Entries |
Document | Title | Date |
20080290856 | Device, Probe, and Method for the Galvanically Decoupled Transmission of a Measuring Signal - The invention relates to a device, a probe, and a method for the galvanically decoupling transmission of a measuring signal. A microwave signal is supplied by a transceiver ( | 11-27-2008 |
20080297137 | UNIVERSAL, WIRELESS, NANO-OPTICAL VOLTMETERS - A universal, wireless, nano-optical voltmeter comprises an organic core having at least one voltage-sensitive dye and at least one polymeric shell substantially surrounding the organic core. The nano-optical voltmeter can detect electric fields in cells. The nano-optical voltmeter allows three-dimensional E field profiling throughout the entire volume of living cells. The nano-optical voltmeter may be calibrated externally and then applied for E field determinations inside any live cell or cellular compartment, with no further calibration steps. | 12-04-2008 |
20080303510 | Optical Sensor Arrangement for Electrical Switchgear - An optical sensor configuration contains an optical current sensor and/or an optical voltage sensor. The sensor configuration further contains a first and a second hollow member, preferably ring shaped profiles, which are together disposed to form a hollow section. The sensor configuration further includes an optical fiber of the current sensor disposed in an annular groove, the groove being disposed at the boundary surface between the first hollow member and the second hollow member, and/or an optical fiber of the voltage sensor is disposed in a recess of the second hollow member. The first hollow member has an annular recess into which the second hollow member is disposed whereas the first hollow member is an L-shaped or U-shaped ring with two legs and the recess is formed between the two legs. | 12-11-2008 |
20090102453 | INSPECTING APPARATUS FOR PHOTOVOLTAIC DEVICES - The present invention provides an inspecting apparatus for photovoltaic devices which electrifies the photovoltaic devices in a forward direction thereof to make the photovoltaic devices emit electro-luminescence light and which has a simple-structured and cheap darkroom. The inspecting apparatus of the present invention includes a darkroom | 04-23-2009 |
20090160431 | Measuring Method, Arrangement and Software Product - The invention presents a method for determining the copper concentration of the substrate using the photoconductivity method in a new manner, the method comprising steps in which the photoconductivity property of the substrate is measured for a first time by an arrangement, the surface of the substrate is illuminated by illuminating means emitting photon radiation, the photoconductivity property of the substrate is measured for a second time by an arrangement, and the copper concentration of the substrate is determined from the change between the first and second time of measurement on the basis of the illumination. The invention also presents an arrangement and a software product for determining the copper concentration. | 06-25-2009 |
20090212763 | OPTICAL SENSOR, OPTICAL CURRENT SENSOR AND OPTICAL VOLTAGE SENSOR - [Object] A simple constitution together with an easy calibration of output by realizing a fast light intensity detection method is realized without using the carrier signal. | 08-27-2009 |
20090261810 | SIMULATOR SYSTEM AND METHOD FOR MEASURING CURRENT VOLTAGE CHARACTERISTIC CURVES OF A SOLAR CONCENTRATOR - A simulator system for simulating operation of a solar panel is disclosed which comprises a solar panel, a reflector positioned across from the solar panel, a light source positioned adjacent to the solar panel for directing light from the light source to the reflector for reflecting light to the solar panel, a sensor positioned adjacent to the solar panel for sensing light reflected from the reflector and for generating a signal indicative of a parameter of the reflected light with the signal having an increasing portion, a flat peak portion, and a decreasing portion, and a circuit for measuring a characteristic of the solar panel when the signal reaches the flat peak portion. | 10-22-2009 |
20090289617 | OPTICAL VOLTAGE SENSOR - A voltage sensor includes two optical sensing fibers and a control unit. The sensing fibers carry a first mode of light and a second mode of light, which are orthogonally polarized, with a birefringence between the two modes depending on the electric voltage to be measured. The control unit is configured to generate light for the two modes in the sensing element and to measure the phase delay suffered between the two modes. A 45° Faraday rotator is arranged between the control unit and the sensing fibers. The Faraday rotator allows the behavior and functionality of the sensing fibers and their associated components to be converted to those of a magneto-optical current sensors with polarization-rotated reflection, which in turn allows use of advanced measuring techniques developed for optical gyroscopes and current sensors. | 11-26-2009 |
20100109642 | OPTICAL VOLTAGE TRANSFORMER - An optical voltage transformer is connected with an external electric device and includes a primary electrode to which a measured voltage is applied by the external electric device, a first secondary electrode provided oppositely to the primary electrode, an insulation layer provided between the primary and first secondary electrodes and constituting an insulation cylinder integrally formed with the primary and first secondary electrodes, a ground layer provided on an outer circumference of the insulation cylinder and around the first secondary electrode for securing a capacitance by interposing the insulation layer between the ground layer and the first secondary electrode, and an electro-optic element for measuring a voltage between the first secondary electrode and the ground layer. According to the optical voltage transformer, measurement of the measured voltage can be done with high accuracy without affected by its surrounding environment and its downsizing can be achieved by reducing the number of its components. | 05-06-2010 |
20100194379 | OPTICAL FIBER ELECTRIC CURRENT MEASUREMENT APPARATUS AND ELECTRIC CURRENT MEASUREMENT METHOD - In a reflection type optical fiber electric current measurement apparatus, a standardization reference signal (Xr), which is defined by the intensity (Pr) of the optical reference signal transmitted through a partial transmission mirror by using a reflector ( | 08-05-2010 |
20100201345 | TIME STRETCH ENHANCED RECORDING SCOPE - A time-stretched enhanced recording scope (TiSER) is described using time stretch analog-to-digital conversion in a real-time burst mode. A chirped optical signal is modulated in response to receiving segments of an input signal. The optical signal with its modulated input signal, is stretched through an optical medium and digitized to represent the waveform segment. TiSER provides ultra-fast real-time sampling within short segment bursts of the original input signal while providing an ability to detect non-repetitive events. Methods and apparatus are also described for providing real-time information about inter-symbol information (ISI), rapidly determining bit-error rates (BER), performing time-domain reflectometry (TDR), generating eye diagrams for serial data, facilitating digital correction of data, clock recovery, optical carrier phase recovery, and otherwise increasing the speed and/or accuracy of a diverse range of high-speed signal measurement and processing activities. | 08-12-2010 |
20100253320 | OPTICAL FIBER ELECTRIC CURRENT SENSOR AND ELECTRIC CURRENT MEASUREMENT METHOD - An optical fiber electric current sensor includes a polarization splitter ( | 10-07-2010 |
20100271004 | FARADAY EFFECT CURRENT SENSOR - The present invention relates to a Faraday sensor assembly comprising a first light guiding element adapted to guide electromagnetic radiation along a first propagation direction, and a second light guiding element adapted to guide electromagnetic radiation along a second propagation direction, the second propagation direction being essentially oppositely arranged relative to the first propagation direction. The Faraday sensor assembly further comprises a measurement region arranged between the first and second light guiding elements, the measurement region being adapted to receive an electrically conducting element having, in the measurement region, its primary extension direction in a direction being essentially perpendicular to the first and second propagation directions. The present invention further relates to methods and systems for stabilizing output signal from the sensors, and to methods and systems for processing signals from the sensor assembly. | 10-28-2010 |
20100283450 | Particle detection - Particle detection and characterising apparatus has an insulating tube ( | 11-11-2010 |
20100283451 | Optically measuring electric field intensities - An apparatus includes an optical resonator and a passive optical device. The optical resonator has first and second optical reflectors and an optical cavity interposed between the reflectors. The optical resonator includes an electro-optically responsive material. One of the reflectors is a distributed Bragg reflector. A passive optical device is configured to direct light through the first optical reflector. The optical resonator is configured to return a portion of the light through the first reflector. | 11-11-2010 |
20100283452 | Apparatus and Method for Measuring Real Time Clock Accuracy in an Electric Meter - An arrangement for measuring an internal clock within an electricity meter includes an optical communication circuit within the meter, an optical detector external to the meter, and a frequency counter. The optical communication circuit within the electricity meter is operably coupled to receive a pulse output of the meter's internal clock, and is further configured to generate a corresponding optical pulse representative of the pulse output. The optical detector is configured to detect the pulse output via an optical port of the electricity meter. The frequency counter is operably coupled to receive from the optical detector a signal that is representative of the detected pulse output. | 11-11-2010 |
20100295538 | Monitoring circuit, method for outputting monitor signal, and optical receiver - A monitoring circuit of the present invention provides a monitor signal with which a magnitude of a current flowing across a photodetector, such as a photodiode, can be calculated accurately over a wide temperature range on the basis of a value of the monitor signal. The monitoring circuit of the present invention includes: a current mirror circuit for outputting a monitor current proportional to an input current, the current mirror circuit having an input point for receiving the input current, the input point being connected to a photodetector and a load resistor, which are connected thereto in parallel; and an output circuit for outputting a monitor signal indicating a difference between a monitor electric potential proportional to the monitor current, and an offset electric potential proportional to an offset current which flows across the load resistor concurrently with the monitor current. | 11-25-2010 |
20110037454 | CdSe QUANTUM DOTS DOPED OPTICAL FIBER AND A CURRENT SENSOR USING THE SAME - Disclosed is an optical fiber for a current sensor, the optical fiber comprising a core doped with CdSe quantum dots and a current sensor using the same. | 02-17-2011 |
20110043187 | METHOD AND CIRCUIT FOR TRACKING MAXIMUM POWER OF A PHOTO-VOLTAIC ARRAY - A method and a circuit for tracking maximum power of a photo-voltaic array performs the operation of load increase/decrease with a preset current difference and determines if the photo-voltaic array operates at zone A or zone B based on change of the output voltage before and after the operation to decide the next operation being for load increase or load decrease. It is not necessary for tracking the maximum power with the multiplier to estimate the output power of the photo-voltaic array. Therefore, the circuit for tracking the maximum power of the photo-voltaic array is capable of being simplified and joined to the pulse width modulation circuit to form an integrated circuit with a function of tracking the maximum power. | 02-24-2011 |
20110050207 | HIGH VOLTAGE MEASUREMENT DEVICE USING POLED FIBERS - Two transversely poled fibers are disclosed which can be wound around a holder with their poling directions being anti-parallel. A coupling exchanges the polarization directions of the modes of the fibers. Thermally and mechanically caused birefringence changes can thereby be substantially cancelled, while electrical field induced birefringence changes can be added, to provide a more robust high voltage measuring device. | 03-03-2011 |
20110062944 | FARADAY OPTICAL CURRENT SENSOR ARRANGEMENT - A Faraday optical current sensor arrangement for measuring the current through a power line comprises a Faraday optical current sensor ( | 03-17-2011 |
20110074393 | TEMPERATURE COMPENSATED FIBER OPTIC CURRENT OR MAGNETIC FIELD SENSOR WITH INSENSITIVITY TO VARIATIONS IN SENSOR PARAMETERS - A fiber optic current or magnetic field sensor uses a sensing fiber in a coil for measuring a current or a magnetic field and has a retarder for converting between linearly polarized light and elliptically polarized light. The retardation of the retarder; its temperature dependence as well as its azimuth angle in respect to the plane of the fiber coil are optimized in dependence of the birefringence in the sensing fiber in order to minimize the influence of temperature variations and manufacturing tolerances on the overall scale factor of the sensor. | 03-31-2011 |
20110084688 | 3-PHASE FARADAY OPTICAL CURRENT SENSOR ASSEMBLY - The object of the invention is to provide a method and a system for fixating a Faraday optical current sensor ( | 04-14-2011 |
20110115469 | OPTICAL FIBER ELECTRIC CURRENT SENSOR, ELECTRIC CURRENT MEASUREMENT METHOD, AND FAULT ZONE DETECTION APPARATUS - An optical fiber electric current sensor includes a polarization-splitter ( | 05-19-2011 |
20110127991 | SENSOR DEVICE, METHOD OF DRIVING SENSOR ELEMENT, DISPLAY DEVICE WITH INPUT FUNCTION AND ELECTRONIC UNIT - A sensor device includes sensor elements arranged in a matrix form, and a sensor driving section driving the sensor elements. Each of the sensor elements includes a photoelectric conversion element generating electric charge, a storage node storing electric charge, to show a voltage which fluctuates according to the stored electric charge, a reset transistor resetting the voltage in the storage node and a readout section reading the voltage value resulted from the stored electric charge in the storage node, to output the resultant voltage value. The sensor driving section controls the reset transistor so that the storage nodes of the sensor elements over sensor element lines are reset into the predetermined reset voltage at a time, and then performs read control after a lapse of a predetermined exposure period to allow the sensor detection signals to be sequentially outputted from the respective sensor elements arranged in each sensor element lines. | 06-02-2011 |
20110127992 | SOLAR SIMULATOR AND A MEASURING METHOD OF A MULTI-JUNCTION PHOTOVOLTAIC DEVICES - The present invention provides a solar simulator that measures characteristics of multi junction photovoltaic devices for a short time, and a measuring method of a multi-junction photovoltaic devices using the simulator. | 06-02-2011 |
20110227559 | Electric field measuring device - The electric field measuring device measures an electric field intensity of an electromagnetic wave generated from equipment under test | 09-22-2011 |
20110234202 | OPTICAL VOLTAGE SENSOR - A polarizing optical system ( | 09-29-2011 |
20110260709 | Energy Monitoring Device - A device, system and method for monitoring a switchable load operably coupled to a positionable switch. The device including a face plate mountable on the positionable switch, a sensor mounted on the face plate, wherein the sensor is configured to detect the position of the positionable switch and electronics mounted on the face plate and operably coupled to the sensor, wherein the electronics are configured to determine the amount of time the positionable switch has been in a given position. | 10-27-2011 |
20110279109 | TEST APPARATUS AND TEST METHOD - There is provided a test apparatus for testing a device under test, including a test signal generator that generates a test signal to test the device under test, an electric-photo converter that converts the test signal into an optical test signal, an optical interface that (i) transmits the optical test signal generated by the electric-photo converter to an optical receiver of the device under test and (ii) receives and outputs an optical response signal output from the device under test, a photo-electric converter that converts the optical response signal output from the optical interface into an electrical response signal and transmits the electrical response signal, and a signal receiver that receives the response signal transmitted from the photo-electric converter and a test method. | 11-17-2011 |
20110285383 | METHOD OF MEASURING TERAHERTZ WAVE AND APPARATUS THEREFOR - In a measurement of a time-domain waveform of a terahertz wave based on time-domain spectroscopy, a current signal including a component originating from the terahertz wave is detected using a photoconductive device, and a voltage signal corresponding to the detected current signal is detected. At a pre-processing stage before the voltage signal detection, an offset current included in the detected current signal and having no relation to the terahertz wave is drawn. The offset current is monitored and the magnitude of the drawn offset current is adjusted according to a result of the monitoring. A time-domain waveform of the terahertz wave is acquired based on the voltage signal detected while drawing the offset current. The monitoring of the offset current and the adjusting of the offset current are performed in a waiting state in which measurement of the time-domain waveform of the terahertz wave is not performed. | 11-24-2011 |
20120007584 | FIBER CURRENT SENSOR WITH REDUCED TEMPERATURE SENSITIVITY - A sensor head assembly is provided, comprising a quarter wave device having shape-induced-birefringence and a sensing coil coupled to the quarter wave device and operable to wind around a current conductor. The quarter wave device converts linearly polarized light from a polarization maintaining fiber to circularly polarized light. | 01-12-2012 |
20120086432 | NON-DESTRUCTIVE DETERMINATION OF FUNCTIONALITY OF AN UNKNOWN SEMICONDUCTOR DEVICE - Processes and systems for use in reverse engineering integrated circuits determine functionality through analysis of junctions responding to external radiation. Semiconductor devices include a number of p-n junctions grouped according to interconnected functional cells. A surface of the semiconductor device is illuminated by radiation, e.g., by a laser or an electron beam, producing electron-hole pairs. Such pairs give rise to detectable currents that can be used to determine locations of irradiated junctions. By scanning a surface of the device in such a manner, a layout of at least some of the junctions can be obtained. The layout can be used to identify functional cells according to a lookup process. By selectively providing input test vectors to the device and repeating the scanning process, first level functional cells can be identified. A netlist of interconnected functional cells can thus be determined and expanded by repeating the process with different test vectors. | 04-12-2012 |
20120139526 | VOLTAGE DETECTION CIRCUIT - A voltage detection circuit used to detect a voltage source includes a Zener diode, a thyristor, a first resistor, a second resistor, a first light-emitting diode (LED), and a second LED. A cathode of the Zener diode is connected to the voltage source. An anode of the Zener diode is connected to a control terminal of the thyristor through a first resistor. An anode of the thyristor is connected to the voltage source through a second resistor. The anode of the thyristor is connected to an anode of the first LED. A cathode of the thyristor is connected to a cathode of the first LED. The cathode of the thyristor is connected to an anode of the second LED, and a cathode of the second LED is grounded. | 06-07-2012 |
20120146622 | TEST APPARATUS FOR POWER SUPPLY UNIT - A test apparatus for a power supply unit is provided, which includes a body unit configured to define a space to receive a light emitting diode (LED) and to provide a test environment to test a supply state of power applied to the LED; and a test unit mounted in the body unit to face the LED and configured to detect flicker of the LED occurring when a power supply is abnormal. According to the foregoing structure, power supply with respect to the LED may be regularly detected and analyzed, thereby increasing quality of power supply with respect to the LED. | 06-14-2012 |
20120187937 | Master-Slave Fiber Optic Current Sensors for Differential Protection Schemes - A master-slave current sensor system for measuring, for example, differential current on a transmission line is described. The slave current sensor can be periodically recalibrated (or have a compensation value re-calculated) based on the master sensor's average output, and the slave sensor can be unpowered and remote from an electronics box which receives its measurements. Health monitoring and fault location can also be performed using the master-slave optical current sensor system, optionally in conjunction with one or more voltage sensors. | 07-26-2012 |
20120242325 | Gel Probe Photocurrent Measurement Device and Methods of Use Thereof - Apparatus and methods of use thereof for the measurement of photocurrents are provided. | 09-27-2012 |
20120262150 | Single-Phase Optical Current Transformer - An installation base is secured to part of outer peripheral surface of cylindrical container | 10-18-2012 |
20120274312 | VOLTAGE MEASURING CIRCUIT - A voltage measuring circuit includes a voltage measuring port, a voltage reference unit, a first voltage comparing unit and a light emitting diode. The voltage measuring port is for receiving an external voltage to be measured. The voltage reference unit includes a port providing a reference voltage. The first voltage comparing unit includes a reference port connected to the voltage reference unit, a measuring port connected to the voltage measuring port, and an output port for outputting a high/low level voltage when the external voltage is lower/higher than the reference voltage. The light emitting diode includes a cathode connected to the output port of the first voltage comparing unit and an anode connected to an external voltage port. | 11-01-2012 |
20120286767 | FIBER OPTIC CURRENT SENSOR - A Fiber-optic current sensor for sensing electric current carried in an electric conductor ( | 11-15-2012 |
20120286768 | METHOD FOR MANUFACTURING OPTOELECTRONIC MEMORY DEVICE - The present invention provides an optoelectronic memory device, the method for manufacturing and evaluating the same. The optoelectronic memory device according to the present invention includes a substrate, an insulation layer, an active layer, source electrode and drain electrode. The substrate includes a gate, and the insulation layer is formed on the substrate. The active layer is formed on the insulation layer, and more particularly, the active layer is formed of a composite material comprising conjugated conductive polymers and quantum dots. Moreover, both of the source and the drain are formed on the insulation layer, and electrically connected to the active layer. | 11-15-2012 |
20130063128 | CONDUCTOR TO WHICH CURRENT DETECTION HEAD IS FIXED, AND CURRENT DETECTION HEAD USED IN MANUFACTURE OF SAME - Provided is a technique for mass-producing a conductor to which is fixed a current detection head that detects the value of current flowing in the conductor, and in which the relationship between the detection value and the current value is stabilized. The head comprises a lens, a magneto-optical element, a conductor, and a fixing member, and the lens, the magneto-optical element, and the conductor are respectively fixed to the fixing member. An optical system is formed using the current detection head such that light is guided through the lens to the magneto-optical element, and light affected by a magneto-optical effect due to the magneto-optical element is guided to the lens. All of the members contributing to current detection are fixed to the fixing member, and therefore the relative positional relationships of all the members contributing to current detection are uniquely determined, enabling conductors with little variation in current detection characteristics to be mass-produced. A shape for determining the positional relationship between the fixing member and the conductor may be formed therebetween in advance, and the positioned current detection head and conductor may be fixed to obtain the conductor. | 03-14-2013 |
20130069628 | OPTICAL FIBRE BIREFRINGENCE COMPENSATION MIRROR AND CURRENT SENSOR - Disclosed is an optical fibre birefringence compensation mirror. Also disclosed is a current sensor wherein vibration resistance has been increased due to the optical connection of the optical fibre birefringence compensation mirror. The optical fibre birefringence compensation mirror includes: an optical fibre, a birefringence element, a lens, a magnet, a Faraday rotator, and a mirror. From the light incidence/emission end surface of the optical fibre, the birefringence element, Faraday rotator, and mirror are arranged in said order. Light comes in from the optical fibre, and is separated into two linearly polarised lights by the birefringence element. The polarisation planes of the two linearly polarised lights are rotated by the Faraday rotator, and the two linearly polarised lights are point-symmetrically reflected at one point by the mirror, then again rotated by the Faraday rotator, then re-combined into one light by the birefringence element and made to enter the optical fibre. | 03-21-2013 |
20130076338 | ELECTRO-OPTIC EFFECT BASED OPTICAL VOLTAGE TRANSFORMER - An electro-optic effect based optical voltage transformer comprises an optical voltage sensor head and an electrical unit, wherein the electrical unit comprises an optical closed-loop feedback control unit and a signal processing unit, the optical closed-loop feedback control unit is connected to the optical voltage sensor head and the optical voltage sensor head is connected to the signal processing unit. In this invention, the light source output power is more stable, the light source center wavelength drift is effectively controlled and the output power coastdown caused by light source aging is prevented; the optical power fluctuation of the optical polarization caused by factors such as temperature, optical fiber vibration, etc., is eliminated, which is conductive to stability and reliability of the optical system; the accuracy of data is improved. | 03-28-2013 |
20130093409 | OPTICAL CURRENT TRANSFORMER FOR GAS-INSULATED APPARATUS - At least one conductor is disposed in sealed vessel, which is filled with insulating gas, an hand hole is provided to a part of sealed vessel and is closed by a sealed cover, and optical fibers are disposed that form a closed loop surrounding conductor in sealed vessel. Optical fibers are hermetically led out of sealed vessel from sealed cover and are provided with at least a light source unit and an optical signal processor unit at the lead-out end. An airtight hollow tube disposed looping around leaving a predefined distance of separation is provided to conductor in sealed vessel, the end of tube is hermetically connected to sealed cover by sealing/bonding means, and optical fibers can be inserted in sealing/bonding means. | 04-18-2013 |
20130093410 | HIGH-VOLTAGE SENSOR WITH AXIALLY OVERLAPPING ELECTRODES AND LOCAL FIELD SENSORS - A voltage sensor includes an insulator with mutually insulated electrodes embedded therein. The electrodes are coaxial and cylindrical and overlap axially along part of their lengths. They are mutually staggered and control the surfaces of electric equipotential such that there is a substantially homogeneous electric field outside the insulator and a substantially homogeneous but higher field within a sensing cavity within the insulator. A field sensor is arranged within the sensing cavity to locally measure the field. This design allows for the production of compact voltage sensors for high voltage applications. | 04-18-2013 |
20130099773 | HIGH-VOLTAGE SENSOR WITH AXIALLY OVERLAPPING ELECTRODES - A voltage sensor includes an insulator with mutually insulated electrodes embedded therein. The electrodes are coaxial and cylindrical and overlap axially along part of their lengths. They are mutually staggered and control the surfaces of electric equipotential such that there is a substantially homogeneous electric field outside the insulator and a substantially homogeneous but higher field within a sensing cavity within the insulator. A field sensor is arranged within the sensing cavity to measure the field. This design allows for the production of compact voltage sensors for high voltage applications. | 04-25-2013 |
20130154613 | SIGNALING CIRCUIT AND METHOD TO DETECT ZONE STATUS - A bi-directional current limiter may be configured to receive an AC signal and bi-directionally limit the loop current to a predetermined current value. A first and second zone may be configured in series with the AC signal and bi-directional current limiter. The first and second zone may include unidirectional current limiters to limit a unidirectional current that is proportionately less than the bi-directionally limited current. A first opto-coupler circuit (ISO | 06-20-2013 |
20130234698 | Integrated optical circuit and method for measuring current as well as sensor module and measuring device - In an integrated optical circuit, light from a light source is polarized and coupled to a first and second strip waveguide. A waveguide coupling element couples the two optical signals from the two strip waveguides to different polarization modes of an optical fiber line. The optical fiber line is connected to a measuring head, which reflects the optical signal and in which a phase difference between the two optical partial signals is modulated in a magnetic field. In the waveguide coupling element, the reflected signal is split into two optical partial signals having the same polarization and the phase difference between the two partial signals is determined. A phase modulator device provides for closed-loop operation. Compared to fiber-optical concepts, the number of splices is reduced. | 09-12-2013 |
20130271113 | Diffractive MEMS based fiber optic AC electric field strength/voltage sensor for applications in high voltage environments - A fiber optic AC electric field or voltage sensing system is described for applications in high voltage environment, particularly, in the vicinity of a power line. The system is based on diffractive MEMS device. A condenser antenna positioned in the electric field feeds a voltage signal to the diffractive MEMS device, which then modulates the light signal passing through it. In the optical receiver, the electric filed strength is measured from the received optical signal. | 10-17-2013 |
20130293218 | OPTICAL SENSOR FOR NON-CONTACT VOLTAGE MEASUREMENT - A voltage sensor for obtaining a light signal representative of an AC voltage in a live electrical wire having a surrounding electrical field, comprising: a conducting device adapted to be placed in the surrounding electrical field and in galvanic isolation to the live electrical wire for causing a movement of charges and extracting a current from the movement of charges; a micro-light source for emitting a light signal, the micro-light source being operatively connected to the conducting device for receiving the extracted current and being directly powered by the extracted current, an intensity of the light signal being related to a value of the AC voltage in the electrical wire; a light guide, operatively coupled to the micro-light source, for receiving and propagating the light signal over a distance. | 11-07-2013 |
20140002057 | WIRELESS INTELLIGENT SOCKET ASSEMBLY WITH ENHANCED COMMUNICATION PERFORMANCE | 01-02-2014 |
20140070792 | Handheld fiber optic current and voltage monitor for high voltage applications - A handheld fiber optic current and voltage monitor for applications in high voltage environment. A light source generates constant optical signal that is split by a fiber optic splitter into two paths. One path feeds a DMEMS based current sensor that is driven by a current to voltage conversion device that converts the current in a conductor into a voltage. The other path goes to a DMEMS based electric field sensor driven by a condenser antenna that converts the electric field near a high voltage power line conductor into a voltage. The output optical signals from the current sensor and the electric field sensor are received by respective optical receivers and converted into electric signals. A signal processing unit processes the signals, and a display screen displays the results. All these are mounted on a plastic mast for handheld operation. | 03-13-2014 |
20140132247 | CURRENT SENSOR - A current sensor ( | 05-15-2014 |
20140152294 | TRANSMITTER POWER MONITOR - The invention provides an in-line power monitor for an RF transmission line that is capable of being calibrated in-line during live conditions at the exact power level and frequency where it is used. This device uses forward and reflected directional couplers and a non-directional coupler to sample the RF voltage on the transmission line. The RF voltage of the forward and reflected channels are each split into two paths, one going to a test port and the other leading to additional circuitry which prepares the signals of the forward and reflected channels for output to power displays. Additionally, the monitor allows the user to compensate for any voltage offsets introduced by various circuitry components. Further, the monitor also allows to user to individually calibrate the output of the forward and reflected channels by applying an adjustable gain ratio correction to each channel. | 06-05-2014 |
20140184197 | Characterization and Calibration of Large Area Solid State Photomultiplier Breakdown Voltage and/or Capacitance - Exemplary embodiments are directed to characterizing a solid state photomultiplier (SSPM). The SSPM can be exposed to a light pulse that triggers a plurality of microcells of the SSPM and an output signal of the SSPM generated in response to the light pulse can be processed. The output signal of the SSPM can be proportional to a gain of the SSPM and a quantity of microcells in the SSPM and a value of an electrical parameter of the SSPM can be determined based on a relationship between the output signal of the SSPM and an over voltage applied to the SSPM. | 07-03-2014 |
20140210452 | SYSTEM AND METHOD FOR EVALUATING ORGANIC MATERIAL FOR ORGANIC SOLAR CELL - An evaluation system | 07-31-2014 |
20140232374 | MEASUREMENT OF PLURAL RF SENSOR DEVICES IN A PULSED RF PLASMA REACTOR - In a plasma reactor having pulsed RF plasma power sources, measurements by RF sensors of nulls attributable to pulse duty cycles are replaced by non-zero measurements synthesized from prior non-zero measurements, to prevent feedback control system instabilities. | 08-21-2014 |
20140327429 | VECTOR NETWORK POWER METER - System and method for implementing a Vector Network Power Meter (VNPM) as a new class of electronic test instrument that uses a novel topology based upon a reflectometer to combine the functionality of a Power Meter with that of a Vector Network Analyzer (VNA). The VNPM overcomes application limitations of the two existing classes of test instruments, including parallel and simultaneous measurement capability, in-circuit operation, and improved accuracy and repeatability by eliminating the calibration of interconnecting cabling. Also provided are alternate implementations of a correlator for the reflectometer which reduce the size and complexity of the correlator while extending its frequency range without limit. | 11-06-2014 |
20140333285 | OPTICAL RECEIVER AND LIGHT RECEPTION CURRENT MONITORING METHOD - An optical receiver includes a light reception element for receiving an optical signal, a bias voltage supply/monitoring circuit for supplying a bias voltage to the light reception element and generating a monitoring voltage indicating magnitude of an output current of the light reception element, and a constant current source. The bias voltage supply/monitoring circuit is supplied with a remaining current obtained by subtracting the output current of the light reception element from an output current of the constant current source. The bias voltage supply/monitoring circuit converts the remaining current to the monitoring voltage. | 11-13-2014 |
20140354263 | OPTICALLY BASED VOLTAGE SENSING DEVICE AND METHOD - A method of measuring fluctuations in electric fields is disclosed, the method comprising the step of: placing a Liquid Crystal Device in communication with the electric field, the device having disparate orthogonal polarization sensitivity to an external electric field; utilising an optical probe beam having a known polarization state to interrogate the liquid crystal of the liquid crystal device to produce a response beam; and analyzing the polarization state of the response beam to provide an indicator of the corresponding fluctuations in the electric field. | 12-04-2014 |
20140361762 | SYSTEMS AND METHODS FOR MONITORING FIBER OPTIC CURRENT SENSING SYSTEMS - A system is provided. The system includes a fiber optic current sensor, and a fiber optic current transducer optically coupled to the fiber optic current sensor and configured to receive polarized light from the fiber optic current sensor, generate an electrical signal from the polarized light, and isolate a direct current (DC) component of the electrical signal. The system further includes a monitoring circuit communicatively coupled to the fiber optic current transducer and configured to receive the DC component from the fiber optic current transducer, and generate an output signal based on the DC component, wherein the output signal is indicative of an operational state of the fiber optic current sensor and the fiber optic current transducer. | 12-11-2014 |
20140368186 | INSPECTION APPARATUS AND INSPECTION METHOD - In accordance with an embodiment, an inspection apparatus includes an electron beam applying unit, a voltage applying unit, a substantially flat component with a lattice pattern, and a first detector. The electron beam applying unit generates an electron beam and applies the electron beam to a sample at a first voltage. The voltage applying unit applies a second voltage to the sample. The polarity of the second voltage is opposite to that of the first voltage. The absolute value of the second voltage exceeds the absolute value of the first voltage. The component is provided at a position where the electron beam specularly reflected by the second voltage before reaching the sample is focused. The first detector detects a secondary electron generated from the component which the specularly reflected electron beam has entered and outputs a first signal. | 12-18-2014 |
20150015240 | METHOD OF DETECTING IRREGULAR CURRENT FLOW IN AN INTEGRATED CIRCUIT DEVICE AND APPARATUS THEREFOR - A method of detecting irregular high current flow within an integrated circuit (IC) device is described. The method comprises obtaining infrared (IR) emission information for the IC device, identifying at least one functional component within the IC device comprising a high current flow, based at least partly on the obtained IR emission information, obtaining IR emission information for at least one reference component within the IC device, and determining whether the high current flow of the at least one functional component comprises an irregular high current flow based at least partly on a comparison of respective IR emission information for the at least one functional component and the at least one reference component. | 01-15-2015 |
20150035516 | METHOD AND DEVICE FOR COUNTING OBJECTS - In the field of the counting of objects, a use is provided of a photosensitive assembly comprising at least one photodiode or one photoresistor, and a source of uniform illumination for illuminating the assembly, the establishment of a reference current supplied by the photosensitive assembly for an illuminated region of this assembly corresponding to a given fraction of the surface of the assembly, the disposition of objects to be counted against the photosensitive assembly, the illumination of the assembly by the source, the objects masking a part of the surface of the assembly, measurement of the current supplied by the assembly, and determination of a ratio between measured current and reference current to deduce the proportion between the surface area of photosensitive element illuminated and the surface area masked by the objects disposed. From this ratio, information on the number of objects disposed on the photosensitive assembly is extracted. | 02-05-2015 |
20150069996 | OPTICAL FIBER FOR A SENSOR AND A POWER DEVICE MONITORING SYSTEM - An optical fiber for a sensor that can measure a current or a voltage precisely is provided. The optical fiber for the sensor | 03-12-2015 |
20150091549 | MICROWAVE VOLTMETER USING FULLY-LINEARIZED DIODE DETECTOR - A radio frequency diode detector has a set of diodes having a differential voltage output, and a current source electrically coupled to the ring of diodes, the current source coupled to provide a forward bias current. This is followed by nonlinear signal processing to create an overall linear detector suitable for use in microwave power measurement. | 04-02-2015 |
20150097551 | FARADAY CURRENT AND TEMPERATURE SENSORS - This patent application discloses techniques and devices for sensing or measuring electric currents and/or temperature based on photonic sensing techniques. An optical current sensor head is located near or at a current-carrying conductor so that a magnetic field associated with the current is present at a Faraday material and the optical detection unit detects the light from the Faraday material to determine a magnitude of the current. An optical temperature sensor head is located near or at a location so that the temperature at a temperature-sensing Faraday material is reflected by the optical polarization rotation which is detected to determine the temperature. | 04-09-2015 |
20150102801 | METHOD AND APPARATUS FOR DETECTING AN ENERGIZED E-FIELD - A method for detecting the presence of an energized e-field in a space, wherein the space includes at least one electrically conductive element disposed in the space and coupled with a controller, the method including receiving in the controller a signal from the at least one electrically conductive element, comparing the value to a threshold, and if the value exceeds the threshold, determining that an energized e-field occupies the space, and sending a signal from the controller indicative of the presence of the energized e-field in the space. | 04-16-2015 |
20150115934 | Temperature Compensated Fiber-Optic Current Sensor - In a fiber-optic current sensor, a 22.5° Faraday rotator, which is part of the sensing fiber coil, determines the working point of the sensor. The coil is operated with substantially linearly polarized light or incoherent substantially left and right circularly polarized light waves. In one arrangement, a polarization beam splitter generates two optical signals that vary in anti-phase with changing current. A signal processor determines the current from the two anti-phase signals. Appropriately detuned and oriented fiber-optic half-wave or quarter-wave retarders before the fiber coil are used to reduce or cancel the adverse effects of temperature and bend-induced birefringence on the measurement signal. Moreover, the temperature may be derived from the difference in the bias of the anti-phase signals and may be used to cancel temperature effects in the signal processor. | 04-30-2015 |
20150137793 | SYSTEMS AND METHODS FOR PRECISION OPTICAL IMAGING OF ELECTRICAL CURRENTS AND TEMPERATURE IN INTEGRATED CIRCUITS - Systems and methods for precision optical imaging of electrical currents and temperature in integrated circuits are disclosed herein. In one aspect of the disclosed subject matter, a method for detecting a characteristic of an integrated circuit can include depositing at least one diamond structure, having at least one color center therein, onto a side of the integrated circuit. | 05-21-2015 |
20150295107 | QUANTUM DOT PHOTO-FIELD-EFFECT TRANSISTOR - Photo-field-effect transistor devices and associated methods are disclosed in which a photogate, consisting of a quantum dot sensitizing layer, transfers photoelectrons to a semiconductor channel across a charge-separating (type-II) heterointerface, producing a sustained primary and secondary flow of carriers between source and drain electrodes. The light-absorbing photogate thus modulates the flow of current along the channel, forming a photo-field effect transistor. | 10-15-2015 |
20150362533 | METHOD AND SYSTEM FOR MONITORING EQUIPMENT AT MEDIUM VOLTAGE - A system for monitoring electrical equipment operative at a medium voltage that is isolated from a low voltage environment includes a transmitter unit that is operative at the medium voltage. The transmitter unit produces an optical signal that is indicative of at least one measured property of the electrical equipment. The optical signal is transmitted via an optical fiber to a low voltage receiver within the low voltage environment. | 12-17-2015 |
20160003874 | MEASURING SYSTEM HAVING SEVERAL SENSORS AND HAVING A CENTRAL EVALUATING UNIT - The invention relates to a measuring system for measuring electrical measurement variables (I | 01-07-2016 |
20160011237 | ELECTRIC CURRENT MEASURING APPARATUS | 01-14-2016 |
20160011264 | TESTING SYSTEM AND METHOD | 01-14-2016 |
20160020075 | MULTI-RANGE VOLTAGE SENSOR AND METHOD FOR A VOLTAGE CONTROLLED INTERFACE OF A PLASMA PROCESSING SYSTEM - A voltage sensor for a voltage controlled interface of a plasma processing system. The voltage sensor receives a RF signal generated by a pickup device. The RF signal is indicative of a RF voltage provided at a substrate in a plasma chamber. The voltage sensor includes first and second dividers corresponding to first and second channels and having first and second capacitance ratios. The dividers receive the RF signal and respectively generate first and second reduced voltage signals. A first output of the first channel outputs a first output signal based on the first reduced voltage signal and while the RF signal is in a first voltage range. A second output of the second channel outputs a second output signal based on the second reduced voltage signal and while the RF signal is in a second voltage range. | 01-21-2016 |
20160033556 | Fiber-optic current sensor with spun fiber and temperature compensation - A fiber-optic current sensor uses a highly-birefringent spun fiber as sensing fiber. The light is fed through a retarder, which is a detuned quarter-wave or half-wave retarder. It is shown that such detuning can be used to compensate for temperature dependencies of the sensing head. | 02-04-2016 |
20160061868 | PROCESS AND DEVICE FOR MEASURING INTERMODULATION PRODUCTS BY REFLECTION OF ELECTROMAGNETIC WAVES ON AN OBJECT - A process and a device for measuring intermodulation products by wave reflection on a non-linear object ( | 03-03-2016 |
20160146861 | MOTHERBOARD VOLTAGE TESTING DEVICE - Motherboard voltage testing device includes a power supply module for supplying a DC voltage, an illuminating module, and a switching module for detecting a DC voltage of a motherboard. A first terminal of the switching module is coupled to the power supply module, and a second opposite terminal of the switching module is coupled to the illuminating module. When the switching module detects the DC voltage of the motherboard is in the motherboard, the illuminating module is configured to receive the DC voltage of the power supply module to emit light, and when the switching module detects there is no remaining DC voltage on the motherboard, the illuminating module cannot receive the DC voltage from the motherboard and the illuminating module is power off and does not emit light. | 05-26-2016 |
20160187391 | ELECTRICAL CURRENT MAGNITUDE INDICATOR - An electrical current magnitude indicator includes a housing, a USB plug, and a current detecting circuit. The current detecting circuit includes a current detecting chip, a resistor, and a light emitting diode (LED). The current detecting chip includes an input pin coupled to a power pin of the USB plug, an output pin, and a ground pin coupled to ground. The current detecting chip receives an input power signal from the power pin, converts the input power signal to an output power signal, and outputs the output power signal through the output pin through the resistor to activate the LED. The brightness of the activated LED varies depending on the output power signal, with the output power signal depending upon the input power signal, with a larger input power signal resulting in brighter light emitted by LED. | 06-30-2016 |
20160377660 | FIBER-OPTIC SENSOR AND METHOD - A fiber optic sensor and related method are described, with the sensor including a cross-coupling element in the optical path between a polarizing element and a sensing element, but separated from the sensing element itself; with the cross-coupling element generating a defined cross-coupling between the two orthogonal polarization states of the fundamental mode of a polarization maintaining fiber guiding light from the light source to the sensing element thus introducing a wavelength-dependent or temperature-dependent sensor signal shift to balance wavelength-dependent or temperature-dependent signal shifts due to other elements of the sensor, particularly signal shifts due to the wavelength dependence of the Faraday effect or the electro-optic effect constant. | 12-29-2016 |
20170234912 | REFLECTIVE CURRENT AND MAGNETIC SENSORS BASED ON OPTICAL SENSING WITH INTEGRATED TEMPERATURE SENSING | 08-17-2017 |
20170234913 | POLARIZATION INSENSITIVE CURRENT AND MAGNETIC SENSORS WITH ACTIVE TEMPERATURE COMPENSATION | 08-17-2017 |