Class / Patent application number | Description | Number of patent applications / Date published |
324633000 | Using resonant frequency | 84 |
20080204043 | Real-Time Assessment of Biomarkers for Disease - A system and methods, thereof, monitor biomarkers from a patient suffering from neural injury in real-time. The system comprises a quartz crystal microbalance wherein a capture molecule specific for certain biomarkers is diagnostic of the type of neural injury, location of neural injury and the degree of severity of neural injury. The system, in particular, provides real-time continuous monitoring of a patient. | 08-28-2008 |
20080218180 | Apparatus, a System and a Method for Enabling an Impedance Measurement - The invention relates to an apparatus ( | 09-11-2008 |
20090009188 | STRUCTURAL HEALTH MONITORING SENSOR SYSTEM AND METHOD USING RESONANT TRANSMISSION LINE SENSORS - A structural health monitoring system and method uses a resonant transmission line sensor. A resonant transmission line sensor, which includes one or more sensor conductors and a dielectric material disposed at least proximate the one or more sensor conductors, is coupled to the structure. The dielectric material exhibits a dielectric constant that varies when at least a portion of the transmission line sensor is subjected to one or more stimuli. One or more resonant frequencies of the transmission line sensor are determined, and the determined one or more resonant frequencies are then correlated to the structural health of the structure. | 01-08-2009 |
20090091335 | Methods for Characterizing Dielectric Properties of Parts - Characterizing dielectric properties of a part includes placing a full-sized part within a dielectric property measurement apparatus. In one embodiment, the full-sized part is a dielectric part of a plasma processing system. The dielectric property measurement apparatus is operated to determine a dielectric constant value of the full-sized part and a loss tangent value of the full-sized part. The determined dielectric constant and loss tangent values are affixed to the full-sized part. | 04-09-2009 |
20090278552 | Method and Measuring Device for Radio Wave Measuring - A generator generates radio-frequency electromagnetic radiation to a resonator whose resonance frequency is affected by a characteristic to be measured of an object to be measured. A receiver receives radio-frequency electromagnetic radiation from the resonator and a signal processing unit searches for a resonance frequency of the resonator for measuring the characteristic to be measured. The generator comprises a digital frequency synthesizer for scanning a frequency of radio-frequency electromagnetic radiation to be applied to the resonator over a desired frequency band by using discrete measuring frequencies. | 11-12-2009 |
20090278553 | SYSTEM AND APPARATUS FOR IN-VIVO ASSESSMENT OF RELATIVE POSITION OF AN IMPLANT - A system and apparatus for providing an in-vivo assessment of relative movement of an implant that is positioned in a living being is provided that comprises a first assembly and a second assembly that are positioned within the living being. The first assembly comprises a passive electrical resonant circuit that is configured to be selectively electromagnetically coupled to an ex-vivo source of RF energy and, in response to the electromagnetic coupling, generates an output signal characterized by a frequency that is dependent upon a distance between the first assembly and the second assembly at the time of the electromagnetic coupling. | 11-12-2009 |
20090295406 | SILICON MEMS RESONATORS - The invention relates to MEMS resonators. In one embodiment, an integrated resonator and sensor device comprises a micro-electromechanical system (MEMS) resonator, and an anchor portion coupled to the MEMS resonator and configured to allow resonance of the MEMS resonator in a first plane of motion and movement of the MEMS resonator in a second plane of motion. In other embodiments, additional apparatuses, devices, systems and methods are disclosed. | 12-03-2009 |
20100019777 | SENSOR SYSTEM AND METHOD FOR OPERATING A SENSOR SYSTEM - A sensor system includes a first sensor, a second sensor, and an analyzer circuit, the first sensor including a first seismic mass having a first resonance frequency and the second sensor including a second seismic mass having a second resonance frequency, and the analyzer circuit being provided for analyzing a first output signal of the first sensor as well as a second output signal of the second sensor and, moreover, the first resonance frequency being unequal to the second resonance frequency. | 01-28-2010 |
20100164513 | NON-DESTRUCTIVE ON-LINE METHOD FOR MEASURING PREDETERMINED PHYSICAL, ELECTROCHEMICAL, CHEMICAL OR BIOLOGICAL STATE TRANSFORMATION OF A SUBSTANCE AND A SYSTEM THEREOF - The present invention discloses a non-destructive on-line method and a system for measuring predetermined physical, electrochemical, chemical and/or biological (PPECB) state transformation of a substance. The method comprises steps selected inter alia from (a) obtaining a non-destructive resonance system (NDRS); (b) determining a resonance frequency characterizing the substance; (c) scanning at least one initial predetermined characteristic parameter around the resonance frequency, and recording the same; (d) plotting an initial 3D chart to obtain a 3D vector which identifies the value of the initial characteristic parameter; (e) providing the examined substance inside the NDRS; (f) on-line scanning at least one corresponding measured parameter around the resonance frequency, and recording the same; (g) plotting a second 3D chart to obtain a 3D vector which identifies the value of the measured parameter; (h) comparing the 3D standard initial vector to the 3D measured vector; (i) obtaining relative characteristic parameter change; and, (j) correlating between the relative characteristic parameter change and the PPECB state transformation. | 07-01-2010 |
20100219840 | Proximity and Contact Sensor and Sensor Element - A proximity and contact sensor ( | 09-02-2010 |
20100231235 | RESONANCE ELECTRIC CURRENT DETECTION SYSTEM - A resonance electric current detection apparatus is disclosed. The above apparatus comprises a detection unit which detects an electric current by a resonance of an inductor L and a capacitor C and outputs to a control unit, and a control unit which controls an electric current detected by the detection unit. With the above construction, It is possible to easily perform a LC resonance electric current control, a speaker network resonance control, an automatic gain control and a LED control by forming the detected resonance electric current as a load circuit or controlling a surge voltage which is generated in a non-load state. | 09-16-2010 |
20110068807 | IMPEDANCE SENSING SYSTEMS AND METHODS FOR USE IN MEASURING CONSTITUENTS IN SOLID AND FLUID OBJECTS - Devices and methods of the invention can be used in many industries, including: utilities, agriculture, food, textile, pharmaceutical, photovoltaic and semiconductor, medical devices, chemical and petro-chemical, material science, and defense, where monitoring and/or analysis of various properties of materials are desired. | 03-24-2011 |
20110128016 | RADIO WAVE INTENSITY MEASURING DEVICE AND RADIO WAVE MEASURING SYSTEM - A radio wave intensity measuring device includes a radio wave absorber ( | 06-02-2011 |
20110133755 | System and Method of Occupant Detection with a Resonant Frequency - An occupant detection system that includes an electrode, an electrical network, and a controller. The electrode is arranged to be proximate to an expected location of an occupant for sensing an occupant presence proximate the location. The electrode is configured to provide an electrode impedance indicative of the occupant presence. The electrical network is coupled to the electrode to form a resonant circuit and is configured to provide a network impedance. The resonant circuit is configured to exhibit a resonant frequency dependent on the network impedance and the electrode impedance. The controller is coupled to the resonant circuit and is configured to determine the resonant frequency and detect an occupant based on the resonant frequency. | 06-09-2011 |
20110169506 | DEVICE AND PROCESS FOR TOUCH AND PROXIMITY DETECTION - The invention relates to a device for touch/proximity detection, especially a capacitive switch device, which is designed to set switching states by approaching the switch device or by touching the switch device, in order to perform, for example, switching actions on an instrument. The invention also relates to a switch device, especially a switch device on a capacitive basis, for a cooktop, for operating the cooktop. | 07-14-2011 |
20110241702 | MEMS-Based Resonant Tunneling Devices and Arrays of Such Devices For Electric Field Sensing - A sensor assembly for electric field sensing is provided. The sensor assembly may include an array of Micro-Electro-Mechanical System (MEMS)-based resonant tunneling devices. A resonant tunneling device may be configured to generate a resonant tunneling signal in response to the electric field. The resonant tunneling device may include at least one electron state definer responsive to changes in at least one respective controllable characteristic of the electron state definer. The changes in the controllable characteristic are configured to affect the tunneling signal. An excitation device may be coupled to the resonant tunneling device to effect at least one of the changes in the controllable characteristic affecting the tunneling signal. A controller may be coupled to the resonant tunneling device and the excitation device to control the changes of the controllable characteristic in accordance with an automated control strategy configured to reduce an effect of noise on a measurement of the electric field. | 10-06-2011 |
20110248724 | DETECTION ELEMENT FOR DETECTING AN ELECTROMAGNETIC WAVE - A detection element for detecting an electromagnetic wave includes: a substrate; a schottky barrier diode disposed on the substrate; and an antenna disposed on the substrate, wherein the antenna includes a first conductive element and a second conductive element which are divided, a third conductive element and a fourth conductive element which are divided, a first connecting member that electrically connects the first conductive element and the third conductive element, and a second connecting member that electrically connects the second conductive element and the fourth conductive element, wherein the first conductive element and the second conductive element, and the third conductive element and the fourth conductive element are formed on multiple surfaces of the substrate, which are spaced apart from each other along an incident direction of the electromagnetic wave, respectively, and wherein the schottky barrier diode is electrically connected between the first conductive element and the second conductive element. | 10-13-2011 |
20110304346 | METHOD FOR TREATING AND SEALING PIEZOELECTRIC TUNING FORKS - Disclosed is an apparatus for estimating a property of a fluid. The apparatus includes: a piezoelectric resonator configured to be disposed in the fluid; an electrode embedded in the piezoelectric resonator and included in a resonator circuit configured to output an electrical signal related to the property; a discontinuity defined by a surface of the piezoelectric resonator, the discontinuity altering an impedance of the resonator circuit if a high-dielectric fluid or a conductive fluid is disposed in the discontinuity; and an insulating material disposed in the discontinuity. | 12-15-2011 |
20120038371 | SYSTEM AND METHOD FOR A NONDESTRUCTIVE ON-LINE TESTING OF SAMPLES - A non-destructive on-line system for detecting a presence of a material in a sample of a substance, including: an MRI device; a flow conduit encompassed by the tunable RF coil of the MRI device and having an input duct and an output duct; a flow of the sample through the flow conduit; a signal detector for detecting frequency-dependent output signals from the MRI device as a function of a frequency variation of the RF tunable coil within a frequency range of an RF resonant frequency of a standard sample of the substance, and a processing unit. | 02-16-2012 |
20120112765 | MEMS In-Plane Resonators - MEMS in-plane resonators include a substrate wafer, at least one resonant mass supported by the substrate wafer and configured to resonate substantially in-plane, and at least one transducer coupled to the at least one resonant mass for at least one of driving and sensing in-plane movement of the at least one resonant mass, wherein at least part of one surface of the resonant mass is configured for exposure to an external environment and wherein the at least one transducer is isolated from the external environment. Such MEMS in-plane resonators may be fabricated using conventional surface micromachining techniques and high-volume wafer fabrication processes and may be configured for liquid applications (e.g., viscometry, densitometry, chemical/biological sensing), gas sensing (e.g., where a polymer film is added to the sensor surface, further degrading the damping performance), or other applications. | 05-10-2012 |
20120112766 | ELECTROMAGNETIC INDUCTION COORDINATE DETECTING SYSTEM AND METHOD THEREOF - An electromagnetic induction coordinate detecting method for detecting the trace of at least one electromagnetic pointing device on an electromagnetic sensor board is disclosed. The method includes the following steps: first, a delayed period for each electromagnetic pointing device is pre-determined. Then, whether a board-trigger signal from the electromagnetic sensor board is received is determined. If yes, the electromagnetic pointing device emits an electromagnetic signal after the delayed period. Finally, the electromagnetic sensor board calculates the coordinate and the pressure of each electromagnetic pointing device according to the received electromagnetic signal. | 05-10-2012 |
20120112767 | CAPACITIVE PROXIMITY SENSOR - A capacitive proximity sensor giving a long front detection range with less erroneous detection. | 05-10-2012 |
20120187959 | Position Detecting Device - A position detecting device includes: a position indicator operable to resonate at a first frequency, upon receipt of an excitation signal, to oscillate at a second frequency different from the first frequency so as to generate an oscillation signal, and to transmit the oscillation signal thus generated; and a position detector operable to generate the excitation signal and to transmit the excitation signal to the position indicator, and configured to perform band pass filtering and amplitude detection upon the oscillation signal received thereby for generating a processed signal, and to obtain information corresponding to position of the position indicator relative to the position detector based on the processed signal. A frequency range of the band pass filtering includes the second frequency and excludes the first frequency. | 07-26-2012 |
20120249163 | SYSTEM AND METHOD FOR DETECTING ARC FORMATION IN A CORONA DISCHARGE IGNITION SYSTEM - A system and method for detecting arc formation in a corona discharge ignition system is provided. The system includes a driver circuit conveying energy oscillating at a resonant frequency; a corona igniter for receiving the energy and providing a corona discharge; and a frequency monitor for identifying a variation in an oscillation period of the resonant frequency, wherein the variation in the oscillation period indicates the onset of arc formation. The method includes supplying the energy to the driver circuit and to the corona igniter; obtaining the resonant frequency of the energy in the oscillating driver circuit; and identifying a variation in the oscillation period of the resonant frequency. | 10-04-2012 |
20120262189 | LAMINATE VARIABLES MEASURED ELECTRICALLY - Embodiments of methods of non-destructively testing whether a laminated substrate satisfies structural requirements are disclosed herein. Additionally, laminated substrates that can be non-destructively tested are also disclosed along with methods of manufacturing the same. To non-destructively test whether the laminated substrates satisfies the structural requirement, an electrical characteristic of the laminated substrate may be detected. Since the detected electrical characteristic is related to a structural characteristic being tested, whether the structural characteristic complies with the structural requirement can be determined based on the electrical characteristic. | 10-18-2012 |
20120319701 | System and Method of Occupant Detection with a Resonant Frequency - An occupant detection system that includes an electrode arranged proximate to an expected location of an occupant for generating an electric field between the electrode and the occupant proximate thereto. An electrical network coupled to the electrode forms a resonant circuit that includes the occupant as part of the resonant circuit. A controller coupled to the resonant circuit is configured to determine a resonant frequency of the resonant circuit indicative of an occupant presence, and a network signal magnitude at the resonant frequency indicative of a humidity value proximate to the electrode. | 12-20-2012 |
20130038337 | MEASUREMENTS IN METALLURGICAL VESSELS - A method, implemented by a software-controlled computer device and/or by dedicated hardware, for probing an electrically conductive target material, e.g. molten metal or semiconductor material, in a metallurgical vessel. In the method, a measurement signal is acquired from a sensor, which is inserted into the target material, during a relative displacement between the electrically conductive target material and the sensor, the measurement signal being indicative of electrical conductivity in the vicinity of the sensor. The measurement signal is generated to represent momentary changes in an electromagnetic field around the sensor, which is created by operating at least one coil in the sensor. Based on the measurement signal, a signal profile is generated to be indicative of the electrical conductivity as a function of the relative movement. The method enables a probing of the internal distribution of the target material in the vessel at any level of detail. | 02-14-2013 |
20130162267 | MULTI PURPOSE CAPACITIVE SENSOR - A multi purpose capacitive sensor suitable for indicating close proximity of a person to a surface along a large-size truck as well as along a medium-size painting or a pocket-size mobile phone is disclosed. The sensor comprises a voltage measuring device provided with a signal ground connected to a first pole of an oscillating voltage source that has a second pole connected to a signal input of the voltage measuring device. This input has a first capacitance to earth and a second capacitance to the signal ground. A third capacitance is exhibited to earth by the second pole of said voltage source. According to the invention, a prebias component is connected between the second pole of the voltage source and the signal input of the voltage measuring device. | 06-27-2013 |
20130234728 | METHOD FOR IDENTIFYING SELF-GENERATED SPURIOUS SIGNALS - A local oscillator (LO) of a test system is set to an initial frequency whereupon a device under test (DUT) transmits a radio frequency (RF) signal to the test system. Characteristics of the RF signal are measured with the test system and used to identify magnitudes and frequencies of spurious signal products. The LO of the test system is reset to one or more subsequent frequencies that are offset from the initial frequency. One or more subsequent RF signals are transmitted from the DUT to the test system, with the DUT maintaining its original signal settings. Characteristics of the subsequent RF signals are measured with the test system and used to identify magnitudes and frequencies of spurious signal products for each of the subsequent LO frequencies. The spurious signal products that have shifted in frequency for each of the subsequent LO frequencies as self-generated signal products can then be identified. | 09-12-2013 |
20130241574 | SEAFOOD PHYSICAL CHARACTERISTIC ESTIMATION SYSTEM AND METHOD - Systems and methods for estimating a physical characteristic of a seafood product are provided. In one system, the estimate is based on a slope defined by a ratio of changes in peak resonant amplitude and frequency of an electromagnetic resonant circuit in loaded and unloaded states. In another system, a first probe of a plurality of probes is driven with a test signal when the plurality of probes is loaded by a seafood product and the estimate is based on received test signals at one or more of the other probes. In another system, the estimate is based on the loading effect of a seafood product on an electromagnetic resonant circuit, which is also used to read an ID from an RFID associated with the seafood product. The systems and methods may be used for individual specimens, or to determine an average estimate for multiple specimens at one time. | 09-19-2013 |
20130285676 | MICROMECHANICAL RESONATORS - Embodiments of the invention include micromechanical resonators. These resonators can be fabricated from thin silicon layers. Both rotational and translational resonators are disclosed. Translational resonators can include two plates coupled by two resonate beams. A stable DC bias current can be applied across the two beams that causes the plates to resonate. In other embodiments, disk resonators can be used in a rotational mode. Other embodiments of the invention include using resonators as timing references, frequency sources, particle mass sensors, etc. | 10-31-2013 |
20140028330 | METHOD AND SYSTEM FOR IMPROVED WIRELESS SENSING - In one embodiment, a RF sensor comprising a sensing antenna and a reference antenna, wherein a sensing material is disposed upon said sensing antenna and wherein the sensing antenna is configured to test for specific analyte by measurement of the resonant impedance spectra, and the reference antenna is configured to mitigate and correct for environmental parameters and positionn. In a further embodiment, a method for sensing comprising; utilizing an RF sensor, wherein the RF sensor comprises a sensing antenna and a reference antenna, wherein said RF sensor is configured to test for a specific analyte; and, measuring a resonant impedance spectra of the sensing antenna and reference antennaat multiple frequencies to provide a subsequent multivariate analysis of a signal response from the RF sensor. | 01-30-2014 |
20140043044 | FUEL SENSOR BASED ON MEASURING DIELECTRIC RELAXATION - Fuel sensor ( | 02-13-2014 |
20140084943 | STRAIN MONITORING SYSTEM AND APPARATUS - This application relates to an apparatus and system for sensing strain on a portion of an implant positioned in a living being. In one aspect, the apparatus has at least one sensor assembly that can be mountable thereon a portion of the implant and that has a passive electrical resonant circuit that can be configured to be selectively electromagnetically coupled to an ex-vivo source of RF energy. Each sensor assembly, in response to the electromagnetic coupling, can be configured to generate an output signal characterized by a frequency that is dependent upon urged movement of a portion of the passive electrical resonant circuit and is indicative of strain applied thereon a portion of the respective sensor assembly. | 03-27-2014 |
20140354299 | SYSTEM AND METHOD FOR A NONDESTRUCTIVE ON-LINE TESTING OF SAMPLES - An MRI-free non-destructive on-line system for detecting a presence of a material in a sample. The system includes: a flow conduit encompassed by a tunable RF coil and having an input duct and an output duct; a flow of the sample through the flow conduit; a signal detector that detects frequency-dependent output signals as a function of a frequency variation of the RF tunable coil within a frequency range of an RF resonant frequency of a standard sample of the substance; and a processing unit. | 12-04-2014 |
20150015275 | PASSIVE WIRELESS ANTENNA SENSOR FOR STRAIN, TEMPERATURE, CRACK AND FATIGUE MEASUREMENT - An apparatus and method is provided for monitoring a condition of a structure using a passive wireless antenna sensor having a known resonant frequency when mounted on the structure. A signal is transmitted with sweeping frequencies around a known resonant frequency to the passive wireless antenna sensor. A signal is received from the passive wireless antenna sensor and a resonant frequency of the passive wireless antenna sensor is determined based on the received signal. The determined resonant frequency is then compared to the known resonant frequency, whereby a change in the resonant frequency indicates a change in the condition of the structure. | 01-15-2015 |
20150028889 | LOW-PROFILE WIRELESS PASSIVE RESONATORS FOR SENSING - A resonator for sensing a physical or an environmental parameter includes a support having a top surface that provides a ground plane, and a polymer-derived ceramic (PDC) element positioned on the top surface including a PDC layer, and a metal patch on the PDC layer. The metal patch is electrically isolated from all surrounding structure, and the resonator has a resonant frequency that changes as a function of the physical or environmental parameter. A system for wirelessly sensing a physical or environmental parameter includes at least one resonator and a wireless RF reader located remotely from the resonator for transmitting a wide-band RF interrogation signal that excites the resonator. The wireless RF reader detects a sensing signal retransmitted by the resonator and includes a processor for determining the physical or environmental parameter at the location of the resonator from the sensing signal. | 01-29-2015 |
20150091584 | CONTACTLESS READABLE PROGRAMMABLE TRANSPONDER TO MONITOR CHIP JOIN - A contactless readable programmable transponder to monitor chip join and method of use are disclosed. The method includes reading a frequency of an oscillator associated with a chip module. The method further includes correlating the frequency with a bond quality of the chip module. | 04-02-2015 |
20150115979 | MULTIPHASE METER - A multiphase meter system including: transmitting and receiving antennas in the flow pipe, wherein the receiving antennas are at different distances from the transmitting antenna, and a control system configured to: apply an electromagnetic field to the transmitting antenna and receive signals from the receiving antenna induced in the fluid or the pipe by the transmission of the electromagnetic field; calculate a resonance quality of the signals received by at least one of the first and second receiver antennas; calculate composition or salinity of the fluid based on the resonance quality if the resonance quality is greater than a threshold value, and calculate composition or salinity of the fluid based on a transmission time difference of the signals received from the first receiver antenna and the signals received by the second receiver antenna if the resonance quality is below the threshold value. | 04-30-2015 |
20150130480 | SYSTEM AND METHOD FOR MONITORING CHARACTERISTICS OF AN ELECTRICAL DEVICE - A remote monitoring system is presented. The system includes a sensor unit disposed in the electrical device, and configured to obtain measurement characteristics in response to a measurand of the electrical device, obtain reference characteristics insensitive to the measurand of the electrical device, and communicate the measurement characteristics and the reference characteristics using time varying electromagnetic fields. Further, the system includes a reader unit to establish a far-field communication with the sensor unit in the presence of at least one metallic interferer in the electrical device, wherein the reader unit is configured to receive the time varying electromagnetic fields associated with the measurement characteristics and the reference characteristics in response to a radio frequency signal transmitted to the sensor unit, and determine the measurand of the electrical device based on at least one property of the received time varying electromagnetic fields associated with the measurement characteristics and the reference characteristics. | 05-14-2015 |
20150346117 | CONDUCTIVITY MEASUREMENTS - The present invention relates to a system for measuring conductivity in a multiphase fluid flow comprising a fraction of water, the system comprising a measuring section including means for emitting electromagnetic signals into a pipe containing said flow within at least one chosen frequency range and means for detecting resonant frequencies within said range. The measuring section comprising features for providing at least two resonanct frequencies within said at least one frequency range, the system also comprising means for based on at least a first resonant frequency and a first Q-factor related to the corresponding resonance peak as well as the Q-factor of a second resonance peak, calculating the conductivity of the water in said flow. | 12-03-2015 |
20150346124 | Method and Apparatus for Determining the Salinity of a Sample - An apparatus for determining the salinity of an ionic sample consisting essentially of: a single current probe having a central aperture large enough to accommodate a tube that contains the ionic sample; a network analyzer electrically coupled to the current probe, wherein the network analyzer is configured to transmit power into the ionic sample when the tube containing the ionic sample is positioned within the central aperture and then further configured to measure the return loss parameter of a signal voltage waveform reflected from the ionic solution; and a reference table of reference sample properties to which the measured return loss parameter may be compared to determine the level of salinity of the ionic sample. | 12-03-2015 |
20160018381 | SENSING SYSTEM AND METHOD - System includes a sensor operably coupled to a device body. The sensor includes a sensing region and at least one resonant inductor-capacitor-resistor (LCR) circuit. The sensing region is configured to be placed in operational contact with an industrial fluid. The at least one resonant LCR circuit is configured to generate an electrical stimulus that is applied to the industrial fluid via electrodes at the sensing region. The device body includes one or more processors configured to receive an electrical signal from the sensor that is representative of a resonant impedance spectral response of the sensing region in operational contact with the industrial fluid responsive to the electrical stimulus. The one or more processors are further configured to analyze the resonant impedance spectral response and determine both a water concentration in the industrial fluid and an aging level of the industrial fluid based on the resonant impedance spectral response. | 01-21-2016 |
20160025656 | Microwave Plasma Spectrometer Using Dielectric Resonator - A dielectric resonator is excited at its natural resonant frequency to produce a highly uniform electric field for the generation of plasma. The plasma may be used as a desolvator, atomizer excitation source and ionization source in an optical spectrometer or a mass spectrometer. | 01-28-2016 |
20160033422 | FANO RESONANCE MICROWAVE SPECTROSCOPY OF HIGH ABSORPTION MATTER - The invention is a method of Fano resonance microwave spectroscopy of high absorption matter. The method comprises: embedding a magnetic-dipolar-mode (MDM) ferrite disk in the microwave cavity, loading a sample of the high absorption matter in the microwave cavity, using a bias magnetic field to tune the MDM resonance frequency of the ferrite disk to the resonance frequency of the cavity; and observing the symmetric Lorentz-like lineshape of the resonance peaks that are obtained. | 02-04-2016 |
20160091544 | APPARATUS AND METHOD FOR HIGH RESOLUTION COMPLEX PERMITTIVITY SENSING USING HIGH Q MICROWAVE SENSORS FOR LOSSY OR NON-LOSSY MEDIUMS AND SAMPLES - Apparatuses and methods for non-contact sensing of physical or chemical properties of a target sample using a planar microwave resonator are provided. In one aspect, a planar microwave resonator is used in combination with an active feedback loop for increasing the quality factor of the resonator to compensate for an existing signal loss in the sample or environment. In another aspect, an active feedback loop is used in combination with a microwave resonator to compensate for signal loss in a lossy medium. In another aspect, a planar microwave resonator comprising a secondary layer defining a sensing interface may be used to facilitate the sensing by exposing the secondary layer to a substance to be investigated. In another aspect, a planar microwave resonator sensor is provided comprising separate resonator and active feedback loop components that are indirectly connected through an electromagnetically coupling and may be constructed on two separate support structure. | 03-31-2016 |
20160141920 | DETECTING DEVICE, POWER RECEIVING DEVICE, CONTACTLESS POWER TRANSMISSION SYSTEM, AND DETECTING METHOD - Disclosed herein is a detecting device including a coil electromagnetically coupled to the external, a resonant circuit that includes at least the coil, and a detecting section that superimposes a measurement signal for measuring the Q-factor of the resonant circuit on a power transmission signal transmitted to the coil in a contactless manner and removes the power transmission signal from an alternating-current signal obtained by superimposing the measurement signal on the power transmission signal. The detecting section measures the Q-factor by using the alternating-current signal from which the power transmission signal is removed. | 05-19-2016 |
20160146742 | SYSTEM AND METHOD FOR MEASURING PERMITTIVITY - A system for measuring a permittivity includes a resonant chamber, a conductive probe, a platform, a pillar, a detector, and a computing module. The resonant chamber has a cavity. The conductive probe is configured for introducing a microwave into the cavity of the resonant chamber. The platform is configured for carrying a sample. The pillar is positioned between the platform and a chamber wall, so that the platform protrudes from the chamber wall. The detector is used to detect a resonant frequency of the microwave when resonance occurs within the cavity. The computing module is configured for calculating a permittivity corresponding to the measured resonant frequency according to a corresponding relationship between resonant frequency and permittivity. The above-mentioned system for measuring a permittivity is capable of measuring a broader range of permittivity with simplified measurement steps and higher accuracy. A method for measuring a permittivity is also disclosed. | 05-26-2016 |
20160146872 | Resonant System and Method of Determining a Dielectric Constant of a Sample - The present invention pertains to a resonant cavity system, more specifically, a resonant system for measuring the dielectric constant of a sample and its method of use. The system and method provide for holding sample materials, which can be in solid, liquid, or powder form, and for reducing the size of the requisite cavity for measurement. The construction incorporates waveguide flange connectors to seal the electromagnetic cavity, which facilitates the measurement of low-loss materials. The design for signal input enables the use of standard calibration techniques and measurement. | 05-26-2016 |
20160161424 | NONCONTACT RESONAMETER, PROCESS FOR MAKING AND USE OF SAME - A noncontact resonameter includes: a resonator to: produce an excitation signal including a field; subject a sample to the excitation signal; produce a first resonator signal in a presence of the sample and the excitation signal, the first resonator signal including: a first quality factor of the resonator; a first resonance frequency of the resonator; or a combination thereof, the first resonator signal occurring in an absence of contact between the sample and the resonator; and produce a second resonator signal in a presence of the excitation signal and an absence of the sample, the second resonator signal including: a second quality factor of the resonator; a second resonance frequency of the resonator; or a combination thereof; a circuit in electrical communication with the resonator to receive the first resonator signal and the second resonator signal; and a continuous feeder to: provide the sample proximate to the resonator; dispose the sample intermediately in the field of the excitation signal during production of the first resonator signal; remove the sample from the resonator; and manipulate a position of the sample relative to the resonator in a continuous motion and in an absence of contact between the sample and the resonator. | 06-09-2016 |
20160187277 | SENSING SYSTEM AND METHOD - A sensor system includes a multi-frequency sensor assembly including a single sensor body housing with a sensing region circuit and a sensor reader disposed in the sensor body. The sensor body is configured to be in operational contact with a fluid. The sensing region circuit is configured to generate different electric fields having different frequencies in the fluid. The sensor reader includes one or more processors configured to examine one or more impedance responses of the sensing region circuit at different frequencies and to determine one or more properties of the fluid based on the one or more impedance responses that are examined. | 06-30-2016 |
20160202105 | DEVICE FOR DETERMINING THE FILL LEVEL OF A MEDIUM IN A CONTAINER | 07-14-2016 |
20160377566 | CARBON BASED CMOS SENSOR RING OSCILLATOR - A structure is provided for sensing an analyte in an environment. The structure may include a ring oscillator on a semiconductor substrate, the ring oscillator includes an AND gate, an odd number of inverters, and a carbon device connected in series, the carbon device is exposed to an environment such that a frequency of the ring oscillator changes when the carbon device is exposed to the analyte in the environment. | 12-29-2016 |
324634000 | To determine water content | 8 |
20080211516 | Method and Measuring Instrument for Measuring Water Content - For measuring the water content of a web in the wire section of a paper machine, at least one radiofrequency-operated resonator sensor forms an electric near field, in which a web affects the resonance frequency of each resonator sensor. The water content of the web is measured as a function of the resonance frequency of each resonator sensor in a measuring unit. | 09-04-2008 |
20090009189 | APPARATUS AND METHOD FOR THE MEASUREMENT OF MASS AND/OR MOISTURE OF DIELECTRIC OBJECTS - An apparatus for the measurement of mass and/or moisture of dielectric objects, with an analysing unit, at least one high frequency generator, at least one high frequency detector and with a high frequency resonator, wherein the at least one high frequency generator can generate at least two modes which are independent from each other, having different resonance frequencies in the resonator, the at least one high frequency detector can measure the occurring frequencies for each mode in the resonator, and the analysing unit can determine a shift of the resonance frequency (A) and a change of the resonance curve for the measured frequencies in each mode, and can calculate the mass and/or moisture of the dielectric object from the determined values for the shift of the resonance frequency (A) and the change of the resonance curve. | 01-08-2009 |
20100141270 | PROCESS AND DEVICE TO MEASURE AT LEAST ONE QUALITATIVE VALUE OF A FIBROUS WEB - A process to measure at least one qualitative measure of a moving fibrous web. The fibrous web being a web of paper or cardboard. The process including the steps of influencing, evaluating and determining. The influencing step includes the influencing of at least one microwave resonator by the fibrous web. The evaluating step including the evaluating of at least one resonance curve of the at least one microwave resonator. The determining step including the determining of at least one quality measure of the fibrous web dependent upon results of the evaluating step. | 06-10-2010 |
20100244855 | Microdevice for the In Situ Detection of Particles of Interest in a Fluid Medium and Operating Method - The invention relates to a detection device of small size, allowing direct in situ detection of particles with no labelling, enabling the particles to be rapidly analysed, and having both a specificity and a sensitivity that are at least equivalent to the existing devices. In one embodiment, the invention provides a device having
| 09-30-2010 |
20110169507 | METHODS AND APPARATUS FOR THE DETERMINATION OF MOISTURE CONTENT - Methods and apparatus for determining water content in a bulk heterogeneous material using electromagnetic radiation. A radiation source and a radiation receiver are positioned such that the material to be measured is located between them. As the radiation signal is transmitted from the source to the receiver, the signal experiences a path loss due, at least in part to the presence of the material located between the source and the receiver. The path loss in the transmitted signal, when recorded over time may be used to determine the water content of the material. | 07-14-2011 |
20110234240 | MONITORING DEHYDRATION USING RF DIELECTRIC RESONATOR OSCILLATOR - Technologies are generally described for monitoring dehydration levels of a subject using Radio Frequency (RF) dielectric resonant oscillators (DROs) that may be affixed to the skin of the subject. According to some example aspects, a sensor comprising a microstrip ring resonator may be affixed to the skin and used to determine the change in hydration of a person quantitatively and/or qualitatively. An RF emitter can be configured to emit a scanning signal to the sensor, where the scanning signal can be swept over a specified frequency range. The sensor is configured to resonate in response to the scanning signal, where characteristics of the sensor's resonance (e.g., the specific frequency and “Q” factor of the resonance) is impacted by dielectric losses of the sensor to the skin due to hydration level of the subject. | 09-29-2011 |
20160123899 | Cavity Resonator System - A cavity resonator system for measuring EM properties of the contents of a pipe portion comprises a primary resonator and a secondary resonator each with the same configuration comprising a conductive casing that defines a cavity and has openings for receiving a pipe portion, insulator material disposed inside the cavity, and antennae for generating and detecting a resonant EM field inside the cavity. In addition, the secondary resonator comprises at least one conductive screening ring that extends around the location occupied by a pipe portion for screening the interior of the ring from the field generated inside the cavity of the secondary resonator. By combining measures of parameters of the field from both resonators, the system may be used to generate a measure representative of EM properties of the contents of the pipe portion that is compensated for variation in the EM properties of the insulator material. | 05-05-2016 |
20160178538 | METHODS OF MONITORING WETNESS UTILIZING A RESONANT CIRCUIT | 06-23-2016 |
324635000 | To determine dimension (e.g., distance or thickness) | 11 |
20090140751 | Microwave paint thickness sensor - A microwave paint thickness sensor includes a single cylindrical cavity, a microwave source, and a signal detector. The cylindrical cavity is open at one end, the open end having a choke joint for interfacing with a painted surface. The cylindrical cavity is designed so that the electronic field is normal to the painted surface. In a preferred embodiment, this is accomplished by providing an optimally designed TM011 mode cavity. In this configuration, the resonant frequency of the cavity is linearly related to the inverse of the paint thickness. In accordance with one aspect of the present invention, the resonant cavity is optimally sized to resonate at a frequency where the sensor footprint can be minimized. Thus with the use of the choke joint, the small sensor interface area of the present invention may easily be applied to a curved surface. | 06-04-2009 |
20100182016 | ELECTRONIC STATUS DETECTION DEVICE - An electronic status detection device for wireless detection of at least one status of an apparatus, wherein the status detection device comprises at least two resonant circuits, of which at least one resonant circuit is active and one resonant circuit is passive, wherein the active resonant circuit comprises at least one control device. A status detection device such as this makes it possible, for example, to reliably detect the presence or the absence of belt clips in safety belt locks. | 07-22-2010 |
20110062964 | METHOD AND APPARATUS FOR MEASURING SURFACE PROPERTIES - A method for measuring surface properties according to the present invention includes the steps of: with distance control feedback applied so that a desired physical quantity to be measured that is attributed to an interaction between a probe and a sample is actually measured while changing a measured distance between the probe and the sample in accordance with a relationship between the desired physical quantity and the measured distance, (i) setting a set value, corresponding to the desired physical quantity, which serves to change the measured distance; and (ii) recording, for each set value thus set, a relationship between the measured distance changed by the set value set in the step (i) and a physical quantity measured with the probe and the sample placed at that measured distance. This allows precise and quick measurement of a physical quantity even in a region where the probe and the sample are very close to each other, while avoiding a collision between them. | 03-17-2011 |
20110095769 | DETECTION OF A DISTANCE VARIATION WITH RESPECT TO A ROTATION AXIS - A method of detection of a distance variation with respect to an axis of at least one point of an object rotating around this axis by a terminal at a fixed position with respect to the axis and capable of emitting a radiofrequency field for at least one resonant circuit attached to the object. The method includes the steps of measuring and recording, on the terminal side, a maximum value of a quantity representative of the coupling between an oscillating circuit of the terminal and the at least one resonant circuit; and detecting a variation of this periodic maximum. | 04-28-2011 |
20120126829 | METHODS AND SYSTEMS FOR MONITORING COMPONENTS USING A MICROWAVE EMITTER - A method for measuring a proximity of a component with respect to a microwave emitter is provided. The method comprises transmitting at least one microwave signal to the microwave emitter. At least one electromagnetic field is generated by the microwave emitter from the microwave signal. Moreover, the method comprises inducing a loading to the microwave emitter by an interaction between the component and the electromagnetic field, wherein at least one detuned loading signal representative of the loading is reflected within a data conduit from the microwave emitter. The detuned loading signal is received by at least one signal processing device. The signal processing device then measures the proximity of the component with respect to the microwave emitter based on the loading signal. An electrical output is generated by the signal processing device. | 05-24-2012 |
20120126830 | Sensor Assembly And Methods Of Measuring A Proximity Of A Machine Component To A Sensor - A microwave sensor assembly includes a signal generator for generating at least one microwave signal and an emitter coupled to the signal generator. The emitter is configured to generate an electromagnetic field from the at least one microwave signal, wherein the emitter is detuned when an object is positioned within the electromagnetic field such that a loading signal is generated. The microwave sensor assembly also includes a detector coupled to the emitter and to the signal generator. The detector is configured to calculate at least one of an amplitude, a phase, and a power of the loading signal at a primary frequency of the loading signal for use in measuring a proximity of an object to the emitter. | 05-24-2012 |
20130134991 | CONDUCTOR LENGTH MEASUREMENT DEVICE AND CONDUCTOR LENGTH MEASUREMENT METHOD - Probes of a conductor length measurement device are connected to piping, and an output voltage is applied to the piping through the probes. A frequency spectrum curve is subsequently calculated by subjecting a voltage signal to FFT. Resonant frequencies of the piping are then determined from this frequency spectrum curve, and the total length of the piping is calculated on the basis of the resonant frequencies. The total length of the piping can therefore be easily measured without the need to install, for example, any measurement instruments at branch terminals. | 05-30-2013 |
20140043045 | Method and Device for Measuring the Position of Segments with Absorbing Substances in Multi-segment Filter Rods of the Tobacco Processing Industry - A method and device for measuring the position of sections with an absorbing substance in multi-segment filter rods of the tobacco processing industry by measuring a varying shift of the resonance frequency A and/or spread of the resonance line B during movement of the rod in the longitudinal direction, using a microwave resonator, which has a field concentration in a spatial area, wherein this spatial area is smaller in the rod direction than the segment length to be determined, forming a difference quotient ΔA of the resonant frequency shift A and/or ΔB of the resonance line spread B relative to the longitudinal direction, determining local extreme values of the respective difference quotients, and assigning local extreme values as a position of a transition from a section with higher content of absorbing substance to a section without, or with lower content, of absorbing substance, and vice versa. | 02-13-2014 |
20150048843 | DEVICE FOR MEASURING COATING THICKNESS - The invention relates to a device for measuring a thickness of a dielectric layer ( | 02-19-2015 |
20160033316 | SYSTEM FOR SENSING FLOWABLE SUBSTRATE LEVELS IN A STORAGE UNIT - A system for estimating a flowable substrate level in a storage unit is disclosed. In one embodiment, the system includes a transmitter and a conductor that extend downwardly into a grain storage bin, which cycles through a range of frequencies in order to determine the resonant frequency of the conductor which changes depending on the amount of grain in the bin. | 02-04-2016 |
20160077022 | METHOD AND DEVICE FOR MEASURING DEPOSITS IN THE INTERIOR OF AN APPARATUS BY USING MICROWAVE RADIATION - The invention relates to a method for measuring deposits in the interior ( | 03-17-2016 |
324636000 | With a resonant cavity | 12 |
20090206844 | ACOUSTIC WAVE DEVICE PHYSICAL PARAMETER SENSOR - An acoustic wave sensor employs an electromagnetic device (EMD) to transduce and amplify the response of an impedance element to a physical measurand. One embodiment uses a magnetic field sensor employing a microelectromechanical system (MEMS) capacitor to affect a change in the response of a SAW filter. | 08-20-2009 |
20090302866 | ANALYTICAL SCANNING EVANESCENT MICROWAVE MICROSCOPE AND CONTROL STAGE - A scanning evanescent microwave microscope (SEMM) that uses near-field evanescent electromagnetic waves to probe sample properties is disclosed. The SEMM is capable of high resolution imaging and quantitative measurements of the electrical properties of the sample. The SEMM has the ability to map dielectric constant, loss tangent, conductivity, electrical impedance, and other electrical parameters of materials. Such properties are then used to provide distance control over a wide range, from to microns to nanometers, over dielectric and conductive samples for a scanned evanescent microwave probe, which enable quantitative non-contact and submicron spatial resolution topographic and electrical impedance profiling of dielectric, nonlinear dielectric and conductive materials. The invention also allows quantitative estimation of microwave impedance using signals obtained by the scanned evanescent microwave probe and quasistatic approximation modeling. The SEMM can be used to measure electrical properties of both dielectric and electrically conducting materials. | 12-10-2009 |
20100201378 | Method and System for Remote Monitoring Deformations of a Structure - A low-cost and non-invasive method for remote monitoring deformations of a structure ( | 08-12-2010 |
20100201379 | Vibrating Wire Ice Indicator - The present invention provides a sensor for detecting the build up of frozen deposits in a cryogen vessel housing a superconducting magnet, comprising a tensioned wire, a source of variable frequency alternating current and a voltage sensor. The tensioned wire is oriented perpendicular to the direction of the stray magnetic field produced by the superconducting magnet. By varying the frequency of the applied current, the resonant frequency of the tensioned wire may be detected as the frequency at which the voltage across the wire is a maximum. Any variation in the frequency or magnitude of the resonant peak may be interpreted as an indication of a frozen deposit hampering the free oscillation of the tensioned wire. | 08-12-2010 |
20120074957 | DEVICE AND METHOD FOR PROCESSING AND MEASURING PROPERTIES OF A MOVING ROD OF MATERIAL - Device and method for processing and measuring properties of a moving rod of tobacco processing industry. Device includes a microwave measurement device in which endless rod is conveyable through microwave resonator from input side to output side. Microwave generator is included to generate a measurement signal having output frequency f | 03-29-2012 |
20130063158 | MICROWAVE CAVITY WITH DIELECTRIC REGION AND METHOD THEREOF - A method and apparatus for obtaining dielectric constant and other measurements of a sample, comprising an open cavity resonator; a microwave energy generator for creating a resonating microwave in the open cavity resonator; a predetermined dielectric material having a high dielectric constant in the range of 2 to 100,000 substantially filling the region in which a microwave resonates; the dielectric material adapted to receive a sample for measurement of the dielectric properties of the sample; whereby during operation the resonating microwave beam is substantially immersed in the predetermined dielectric material such that the effective electrical spot size and beam cross-section along the cylindrical axis of the resonating microwave is reduced as a function of the inverse of the square root of the predetermined dielectric material dielectric constant. The dielectric constant or loss tangent of the sample may be determined based upon the change in the cavity's resonant frequency modes. | 03-14-2013 |
20130181725 | MEANDER-LINE RING RESONATOR - Methods and apparatus for measuring permittivity comprising: a meander-line ring resonator, which may be may be disposed on a substrate proximate to and separated from an input coupler and an output coupler thereon, the resonator ring further including a continuous conductive material having at least two turns to form a single congruent pattern, symmetrical along at least one axis. | 07-18-2013 |
20130207670 | REGENERATIVE FEEDBACK RESONANT CIRCUIT - A regenerative feedback resonant circuit for measuring a transient response in a loop is disclosed. The circuit includes an amplifier for generating a signal in the loop. The circuit further includes a resonator having a resonant cavity and a material located within the cavity. The signal sent into the resonator produces a resonant frequency. A variation of the resonant frequency due to perturbations in electromagnetic properties of the material is measured. | 08-15-2013 |
20140361791 | APPARATUS AND METHOD FOR MEASURING DIELECTRIC CONSTANT - Provided are an apparatus and method for measuring a dielectric constant. The apparatus includes a cavity resonator including a cavity therein, an insertion hole penetrating through the cavity vertically and in which a sample is inserted, and grooves symmetrically formed with respect to the cavity in the insertion hole, a network analyzer configured to generate an electromagnetic signal supplied to the cavity resonator, receive an electromagnetic signal passed through the cavity resonator, and calculate a scattering parameter, a transmission means configured to supply the generated electromagnetic signal to the cavity resonator, a reception means configured to supply the electromagnetic signal passed through the cavity resonator to the network analyzer, and a calculation processor configured to receive the scattering parameter from the network analyzer and calculate a dielectric constant of the sample. | 12-11-2014 |
20150108999 | DEVICE FOR MEASURING THE QUALITY FACTOR OF A CAVITY, IN PARTICULAR A SUPERCONDUCTING CAVITY PERTURBED BY RESONANT ELECTRON DISCHARGES - A device for measuring the unloaded quality factor of a resonant cavity which has an input port to accept incident power and an output port to measure the dissipated power, wherein the device includes: a transmission line designed to be coupled to the input port of the resonant cavity to be characterized, which has a coupling coefficient β | 04-23-2015 |
20150123678 | PASSIVE WIRELESS SELF-RESONANT SENSOR - A sensor for detecting one or more materials includes a substrate, a passivation layer formed on the substrate, a self-resonant structure and a high surface area material disposed on the passivation layer. The self-resonant structure includes a planar spiral inductor and a plurality of planar interdigitated capacitor electrodes disposed within the passivation layer. The planar spiral inductor includes an electrically conductive trace formed on the substrate in a planar spiral pattern having at least two turns and an inter-winding space between parallel segments of the electrically conductive trace. The plurality of planar interdigitated capacitor electrodes are electrically connected to the electrically conductive trace of the planar spiral inductor and formed on the substrate within the inter-winding space of at least one outermost turn of the planar spiral inductor. The high surface area material includes a conformal polymer coating to increase a sensitivity to the one or more materials. | 05-07-2015 |
20160178601 | Measurement of Sugar in a Solution | 06-23-2016 |