Class / Patent application number | Description | Number of patent applications / Date published |
702098000 | Pressure | 48 |
20080208502 | Method For Improving an Indirectly Measuring Tire Pressure Monitoring System - Disclosed is a method of improving the recognition of a tire pressure loss in a tire pressure monitoring system in which at least one reference value (A) is formed on the basis of signals representing the rotational speeds of several vehicle wheels. A pressure loss is concluded by comparing a currently determined reference value with at least one reference value if the currently determined reference value exceeds or falls short of a predefined value. A noise analysis of the reference value(s) ( | 08-28-2008 |
20080319697 | SYSTEM AND METHOD FOR DETERMINING AN AMOUNT OF PRESSURE APPLIED BY AN OCCUPANT ON A VEHICLE SEAT - A system and a method for determining an amount of pressure applied by an occupant on a vehicle seat are provided. The method includes receiving signals from a pressure transducer, a temperature sensor, and a belt tension sensor. The method further includes determining a compensated pressure value indicative of the amount of pressure applied to the vehicle seat based on the signals from the pressure transducer, the temperature sensor, and the belt tension sensor. | 12-25-2008 |
20090132193 | METHODS AND APPARATUS FOR CALIBRATING STRIATION DENSITY MODELS FOR MATERIALS - A method for generating a calibration for a striation density model with respect to a material includes the steps of generating a first relationship between a striation density and a depth of a crack in a specimen comprising the material, generating a second relationship between the striation density and the depth of the crack in the specimen, and calculating an adjustment, based on a comparison between the first relationship and the second relationship. | 05-21-2009 |
20090222230 | SYSTEMS AND METHODS FOR COMPENSATING PRESSURE SENSOR ERRORS - A pressure sensor compensation system for a control system of an engine includes N engine-off pressure measuring modules. The N engine-off pressure measuring modules calculate differences between pressure values of a corresponding one of N pressure sensors and others of the N pressure sensors when the engine is off. The N engine-off pressure measuring modules calculate N corresponding pressure correction values based on the differences, where N is an integer greater than one. N pressure compensating modules generate N corrected pressure values when the engine is on based on N uncorrected pressure values from the N pressure sensors and the N pressure correction values. | 09-03-2009 |
20090299672 | METHODS AND APPARATUS FOR NON-INVASIVE IMPLANTABLE PRESSURE SENSOR CALIBRATION - An economical, repeatable, and non-invasive method and apparatus for the calibration of implantable pressure sensors that can minimize patient discomfort and risk of infection. In one embodiment, a calibration system for calibrating a first pressure sensor coupled to a management device and implanted into a human patient is provided. The calibration system includes a mouthpiece, a pump, a second pressure sensor, and a computer. The pump provides a positive pressure into an airway of the human patient via the mouthpiece. The second pressure sensor measures the airway pressure of the human patient, and the computer is coupled to the pump and monitors pressures measured by the first and second pressure sensors. Here, the computer also calculates one or more calibration constants based on the pressures measured by the first and second pressure sensors and provides the calibration constants to the management device to calibrate the first pressure sensor. | 12-03-2009 |
20100076711 | METHOD OF AUTO-CALIBRATING AIRCRAFT CABIN PRESSURE SENSORS - A method of auto-calibrating aircraft cabin pressure sensors in a cabin pressure control system while in service, wherein at a constant sensed cabin pressure during a cruise flight phase at least one pressure sensor output voltage from each of two cabin pressure sensors are recorded. Upon landing and opening of the cabin doors the sensed cabin pressure value is compared to an external field pressure. A new software slope variable and a new software offset variable are computed for the pressure/voltage function using an average computed pressure value in cruise and the recorded field atmospheric pressure sensor voltage value on the ground. Thereafter, a new cabin pressure value is calculated and control software is modified. | 03-25-2010 |
20100076712 | GAS ANALYZER - A gas analyzer using a quadrupole mass spectrometric method etc. is provided with an ionizer | 03-25-2010 |
20100076713 | Compact Oscillometric Blood Pressure Simulator - A system for generating pressure pulses to calibrate a blood pressure (BP) monitor or other pressure sensing device is disclosed. The oscillometric blood pressure (BP) simulator of the preferred embodiment comprises an elastomeric bladder pneumatically coupled to the BP monitor, and an actuator adapted to reversibly compress the elastomeric bladder and induce one or more pressure pulses of predetermined magnitude, duration, and frequency in the BP monitor. The elastomeric bladder generally comprises an elastomeric tube such as medical grade hose or tubing that is compressed by a piston and bearing driven by a linear actuator, preferably a stepper motor and cam. The simulator further includes a plurality of serially coupled H-bridges for energizing the stepper motor windings with bipolar square pulses. | 03-25-2010 |
20100121600 | Method and Device For Checking A Pressure Sensor Of A Fuel Injector System - A method for checking a pressure sensor of a fuel injection system, especially of a motor vehicle, the fuel injector system having a pressure reservoir to which the pressure sensor and an injector are assigned; in the method, a fuel quantity being injected under a pressure by the injector, wherein a pressure difference, which is created by a sudden pressure drop caused by the injection process, is ascertained as a function of the pressure and the fuel quantity. | 05-13-2010 |
20100191495 | METHOD, SYSTEM AND COMPUTER PROGRAM OF DETECTING A TIRE PRESSURE DEVICE - The invention is directed to a system, a method and a computer program including program code for carrying out the method, when executed on a processing system, of issuing a tire pressure deviation in a vehicle's tire. The system comprises a calculation unit ( | 07-29-2010 |
20100198545 | METHOD FOR CALIBRATING AND OPERATING A MEASURING CELL ARRANGEMENT - Calibrating a measuring cell arrangement having a diaphragm vacuum measuring cell, a measuring connector connected to circuitry which has a memory, a control and an interface for exchange of data with peripheral devices and a programmable heater for heating the diaphragm vacuum measuring cell to a presettable temperature includes connecting the measuring cell arrangement to a calibration mechanism, connecting the measuring connector to a vacuum volume and connecting the measuring cell interface to a calibration procedure control, as well as switching on the measuring cell arrangement. The method includes setting a first heating temperature on the measuring cell arrangement to a preset constant value, performing a first calibration step of the measuring cell arrangement by generating at least one preset pressure in the vacuum volume with the simultaneous acquisition of vacuum measuring signals of the measuring cell arrangement and at least one reference measuring cell, as well as storage of the acquired pressure values in the memory, determining compensation values with a calibration processor from the determined difference values of the measuring cell arrangement and the reference measuring cell, as well as intermediate storage of these difference values in a calibration data memory of the calibration procedure control and gauging the measuring cell arrangement by transmitting the determined compensation values to the measuring cell data memory for the deviating values determined at the various preset working points for pressures and temperature in relation to the reference measuring cell. | 08-05-2010 |
20100318308 | CALIBRATION IN INDIRECT TIRE PRESSURE MONITORING - A method, system and computer program product for detecting a tire pressure deviation in a tire of a vehicle by determining tire pressure indicating data indicative of a tire pressure condition of the tire and determining tire pressure deviation data indicative of a tire pressure deviation in the tire. | 12-16-2010 |
20110010123 | Method of Pressure Testing - A computer-based method for pressure testing. The method can include determining physical characteristics of a system of conduits. Additionally, the method can include determining a pressure limit associate with the system based on the physical characteristics. The method can also include identifying a target portion of a conduit in the system that may have a thermal gradient and positioning a probe for measuring temperature along a middle portion of the target portion. The method can include determining an average rate of temperature change along the target portion based on the temperature data from the probe for a period of time and determining a thermal mixing zone between the probe and another probe in the system based on a type of substance between the probes. Furthermore, the method can include determining a thermal model for the target portion based on the determined average rate of temperature change, a volume of the target portion, and the determined thermal mixing zone. Moreover, the method can include obtaining pressure data for the target portion by pressure testing the identified target portion, and adjusting the obtained pressure data based on the thermal model. | 01-13-2011 |
20110093229 | METHOD FOR CALIBRATING SENSORS - A method for calibrating sensors in a system including a plurality of sensors which are arranged so that they can be subjected to the same load includes the steps of detecting the level of an operating parameter for a certain load level individually by at least two of the sensors, calculating a mean value of the operating parameter for the sensors for the load level, determining a deviation from the mean value for each of the sensors, and saving the value of the deviations for use in operation of the system. | 04-21-2011 |
20110153252 | ACTUATOR-BASED CALIBRATION SYSTEM FOR A PRESSURE-SENSITIVE CATHETER - A calibration apparatus includes a fixture coupled to hold a distal end of a medical probe. An actuator is configured to press against the distal tip of the probe and apply to the distal tip multiple force vectors having respective magnitudes and angles with respect to the distal end, so as to cause a deformation of the distal tip relative to the distal end. A sensing device is configured to measure the magnitudes of the force vectors applied by the actuator. A calibration processor is configured to receive from the probe first measurements indicative of the deformation of the distal tip in response to the force vectors, to receive from the sensing device second measurements indicative of the magnitudes of the force vectors, and to compute, based on the angles and the first and second measurements, calibration coefficients for assessing the force vectors as a function of the first measurements. | 06-23-2011 |
20110153253 | CALIBRATION SYSTEM FOR A PRESSURE-SENSITIVE CATHETER - A calibration apparatus includes a fixture, which is coupled to accept a probe so that a distal tip of the probe presses against a point in the fixture and produces first measurements indicative of a deformation of the distal tip relative to a distal end of the probe, in response to pressure exerted on the distal tip. A sensing device is coupled to the fixture and is configured to produce second measurements of a mechanical force exerted by the distal tip against the point. A calibration processor is configured to receive the first measurements from the probe, to receive the second measurements from the sensing device and to compute, based on the first and second measurements, one or more calibration coefficients for assessing the pressure as a function of the first measurements. | 06-23-2011 |
20110257921 | METHOD FOR DETERMINING THE PRESSURE OFFSET OF AN IN-CYLINDER PRESSURE SENSOR - An embodiment of the invention provides a method for determining the pressure offset of an in-cylinder pressure sensor of an internal combustion engine, comprising the steps of: setting a plurality of couples of instants during an engine cycle within the cylinder; acquiring the pressure measured by the in-cylinder pressure sensor in each instant of each couple of instants; calculating a plurality of pressure offset values, each of which as a function of the pressures measured in a correspondent couple of instants (θiA, θiB); setting an admissible pressure offset range; selecting the pressure offset values that fall within the admissible pressure offset range; and, if the number of selected pressure offset values is greater than a minimum allowable limit, calculating a final pressure offset as a function of the selected pressure offset values. | 10-20-2011 |
20110264392 | METHOD FOR CORRECTING THE DRIFT OF A PRESSURE SENSOR SIGNAL - A method for correcting the drift of the signal from a sensor measuring the pressure in a cylinder of an internal combustion engine, the signal being comparable to a straight line of equation y=A×x+B, on which signal are overlaid pressure spikes, the correction method includes:
| 10-27-2011 |
20110307207 | WEIGHT-BASED CALIBRATION SYSTEM FOR A PRESSURE SENSITIVE CATHETER - A calibration apparatus includes a fixture, which is coupled to hold a distal end of a medical probe. A plurality of weights, which have respective masses and respective bottom surfaces that are oriented at respective angles with respect to the distal end of the probe, are coupled to rest on a distal tip of the probe so as to apply to the distal tip respective force vectors that cause a deformation of the distal tip relative to the distal end. A calibration processor is configured to receive from the probe measurements indicative of the deformation of the distal tip in response to the force vectors, and to compute, based on the measurements, the masses and the angles, calibration coefficients for assessing the force vectors as a function of the measurements. | 12-15-2011 |
20120046898 | SYSTEMS AND METHODS FOR PRESSURE MEASUREMENT USING OPTICAL SENSORS - Embodiments of systems and methods for pressure measurement using optical sensors are disclosed that include a computer processor that executes logic instructions to receive data based on optical signals from an optical sensor. The data represents velocity of the object after being exposed to a first pressure force. The velocity is determined from an unshifted, reference optical signal and a Doppler-shifted optical signal reflected off the object. The pressure force applied to the object is determined based on the velocity of the object. | 02-23-2012 |
20120136605 | METHODS AND SYSTEMS FOR RECALIBRATING A BLOOD PRESSURE MONITOR WITH MEMORY - Systems and methods are provided for storing and recalling metrics associated with physiological signals. It may be determined that the value of a monitored physiological metric corresponds to a stored value. In such cases, a patient monitor may determine that a calibration is not desired. In some cases, a patient monitor may recall calibration parameters associated with the stored value if it determined that the stored value corresponds to the monitored metric value. | 05-31-2012 |
20120166124 | SENSOR RESPONSE CALIBRATION FOR LINEARIZATION - A method for determining an unknown input measurand P | 06-28-2012 |
20120215476 | METHOD AND DEVICE FOR CALIBRATING LOAD SENSORS - A device and a method for calibrating load sensors which are provided at least one load cross-section of an aerofoil or control surface of an aircraft, the load sensors being calibrated on the basis of load coefficients (α | 08-23-2012 |
20120239335 | AUTOMATICALLY CONFIGURABLE SENSING DEVICE - The present document describes a ready to use sensing device which is auto-configurable when turned on. The sensing device includes one or more sensors and a communication port. When turned on, the system automatically contacts a central server via the communication port and requests the address of a second server with which the sensing device is associated. Upon receipt of the address of the second server, the sensing device contacts the second server and requests its customized configuration settings. When received, the configuration settings are installed, and the sensing device starts to sample the output of the sensors and sends the samples to the second server for storage. The user may view the measurement data by accessing the second server through the internet. The minimum memory capacity required for operating the sensing device is very low, due to the fact that the samples are sent to the second server every time the samples are taken. | 09-20-2012 |
20130090880 | FORCE SENSOR CORRECTING METHOD - The present invention provides a force sensor correcting method which is simple and capable of performing correction, with the force sensor remaining mounted at the end of an arm without an exchange of an end effector. In the present invention, a force sensor | 04-11-2013 |
20130173200 | METHOD FOR SYNCHRONIZING SENSORS - The invention relates to a method for synchronizing sensors in a sensor array, including at least one electronic control unit and at least one sensor, which are connected to each other by a first and a second line, wherein the sensor is supplied with electric power by the first and second lines, and additionally at least one data signal (a) is transmitted by the first and second lines from the sensor to the electronic control unit, wherein the electronic control unit transmits a defined supply voltage signal having varying polarity as a synchronization signal (b, c) to the sensor, whereupon the sensor transmits at least one data signal (a) to the electronic control unit, after the polarity of the synchronization signal has been reversed. | 07-04-2013 |
20130218501 | Temperature Compensated Digital Pressure Transducer - A digital pressure transducer includes a sensor, a memory component and a microprocessor. A correction algorithm and set of correction coefficients are provided and stored in the memory. An application applies the correction coefficients to convert digitized values to pressure values. The transducer may include a read/write port adapted to communicate with a computer terminal; and at least one read-only port adapted to communicate with a host device. A method of calibrating a digital pressure transducer includes storing a correction algorithm and correction coefficients in the digital pressure transducer separate from a host device. | 08-22-2013 |
20130218502 | TEMPERATURE COMPENSATED PRESSURE TRANSDUCER - A pressure transducer includes a sensor, a memory component, and a microprocessor. In one embodiment, a correction algorithm and set of compensation coefficients are provided and stored in the memory. The algorithm applies the compensation coefficients to determine a compensated pressure value. The pressure transducer may store the correction algorithm and the compensation coefficients for use in the field. | 08-22-2013 |
20130275070 | ELECTRONIC CONTROL SYSTEM - An electronic control system includes a microcomputer and a signal processing circuit, and receives output signals of an in-cylinder pressure sensor and a crank angle sensor. The output signal of the pressure sensor indicates an output voltage of a piezoelectric transducer and a reference voltage. The signal processing circuit includes a hold circuit and a differential amplifier circuit. The differential amplifier circuit amplifies a difference between the output signal of the pressure sensor and the output signal of the hold circuit and outputs the result to the microcomputer. The hold circuit switches over the output signals in response to a switchover instruction of the microcomputer. When the switchover instruction is a set instruction, the hold circuit holds as its output signal the output signal of the pressure sensor outputted at the time of receiving the set instruction. The microcomputer outputs the set instruction to the hold circuit in response to the output signal of the crank angle sensor. | 10-17-2013 |
20130317772 | SENSOR DEVICE AND RELATED OPERATING METHODS - Apparatus, systems, and fabrication methods are provided for sensing devices. An exemplary sensing device includes a first sensing arrangement to measure a first property and provide one or more measured values for the first property, a second sensing arrangement to measure a second property, a storage element coupled to the second sensing arrangement to maintain a stored value for the second property measured by the second sensing arrangement, and a control system coupled to the first sensing arrangement and the storage element to determine one or more calibrated measurement values for the first property using the one or more measured values for the first property from the first sensing arrangement and the stored value for the second property. | 11-28-2013 |
20140136136 | NOX DETECTION APPARATUS AND NOX SENSOR SYSTEM | 05-15-2014 |
20140222362 | Automatic Calibration Adjustment of Capacitance Diaphragm Gauges to Compensate for Errors Due to Changes in Atmospheric Pressure - In order to mitigate the negative effects of a change in atmospheric pressure, an improved capacitance diaphragm gauge (CDG) sensor incorporates an independent ambient atmospheric pressure sensor near the CDG sensor body. The ambient atmospheric sensor is located outside the CDG sensor body to sense the ambient atmospheric pressure surrounding the CDG sensor body. The ambient atmospheric sensor provides an output that represents the ambient atmospheric pressure. A sensor output processing circuit receives the output of the ambient atmospheric sensor as well as the output of the CDG sensor. The processing circuit utilizes the output from the ambient atmospheric pressure sensor to fine tune the CDG measurement of pressure by executing an in situ, real time, automatic calibration adjustment of the CDG. | 08-07-2014 |
20140222363 | Multi-Axis Tilt Sensor for Correcting Gravitational Effects on the Measurement of Pressure by a Capacitance Diaphragm Gauge - A system and method compensate for effects of gravity on the diaphragm of a capacitance diaphragm gauge (CDG). The CDG generates a measured absolute pressure value in response to an applied absolute pressure on an input of the CDG. The CDG is subjected to a variable orientation of the CDG with respect to the earth's surface that can cause inaccurate pressure measurements. A pressure measuring circuit generates a measured value of an applied absolute pressure provided to an input of the CDG. A tilt sensor generates at least one tilt sensor output value that is responsive to an orientation of the CDG with respect to the earth's surface. A processing system adjusts the measured absolute pressure value by a calibration factor to generate a calibrated absolute pressure value representing the applied absolute pressure, wherein the calibration factor is selected in response to the at least one tilt sensor output value. | 08-07-2014 |
20140278184 | Zero Deadband Processing for Velocity Transmitters - Systems, apparatuses and methods are disclosure for adjusting and/or modifying outputs of sensors based on deadband effects, where sensor adjustments may be based on a value, which may be a constant, such as an error value for the sensor, or a dynamic value. Differential pressure values measured from the output of sensors are compared to the value, and, in response to the comparison, the output of the sensor may be set substantially to zero if the measured differential pressure value is less than the value. Otherwise, the measured differential pressure values are passed through if they are is equal to or greater than the value. Additional techniques employing zero offsets, span adjustment and error scale adjustments are further disclosed. | 09-18-2014 |
20140278185 | SYSTEMS AND METHODS FOR SENSOR DRIFT COMPENSATION - An exemplary embodiment of the present invention provides systems and methods of compensating sensor drift. In one example embodiment, a system may comprise a primary sensor having a primary full-scale range and configured to output a primary environmental condition signal indicative of an environmental condition; a reference sensor having a reference full-scale range and configured to output a reference environmental condition signal indicative of the environmental condition, wherein the reference full-scale range is less than the primary full-scale range; and a drift compensation system configured to determine a drift compensation signal using the primary environmental signal and the reference environmental condition signal responsive to the reference environmental conditional signal being in the reference full-scale range and compensate the primary environmental condition signal using the drift compensation signal. | 09-18-2014 |
20140350882 | PRESSURE DATA ACQUISITION ASSEMBLY - A method and assembly for acquiring pressure data. A pressure sensor is applied to a target surface on an individual. A calibrator and a processing element are in communication with the pressure sensor. Processing element receives pressure data and provides an integrated pressure value over a measurement time period. The integrated pressure value is compared to an alert value and to a change condition value. Where an alert value is exceeded, an alert is transmitted to an output device for display. Where a change condition value is exceeded, a measurement parameter of the pressure sensor is changed, or the calibrator is applied to the pressure sensor to recalibrate the pressure sensor to a recalibrated pressure range. | 11-27-2014 |
20150012235 | Multi-Axis Tilt Sensor for Correcting Gravitational Effects on the Measurement of Pressure by a Capacitance Diaphragm Gauge - A system and method compensate for effects of gravity on the diaphragm of a capacitance diaphragm gauge (CDG). The CDG generates a measured absolute pressure value in response to an applied absolute pressure on an input of the CDG. The CDG is subjected to a variable orientation of the CDG with respect to the earth's surface that can cause inaccurate pressure measurements. A pressure measuring circuit generates a measured value of an applied absolute pressure provided to an input of the CDG. A tilt sensor generates at least one tilt sensor output value that is responsive to an orientation of the CDG with respect to the earth's surface. A processing system adjusts the measured absolute pressure value by a calibration factor to generate a calibrated absolute pressure value representing the applied absolute pressure, wherein the calibration factor is selected in response to the at least one tilt sensor output value. | 01-08-2015 |
20150057960 | METHOD FOR DETERMINING A STATE OF CREDIBILITY OF MEASUREMENTS MADE BY SENSORS OF AN AIRCRAFT AND CORRESPONDING SYSTEM - A method for determining a state of credibility of measurements made by sensors of an aircraft is provided. This method includes determining a speed of the aircraft, from static and total pressure measurements, determining a coefficient of lift of the aircraft from an incidence measurement and from said speed, determining a weight of the aircraft, determining if an equation of lift of the aircraft is satisfied, activating a state of optimal credibility, wherein the measurements made by said sensors are considered to be reliable if the said equation of lift is satisfied, activating a state of non-optimal credibility, wherein the measurements of at least one sensor are considered to be unreliable if the said equation of lift is not satisfied. | 02-26-2015 |
20150094976 | CALIBRATION OF AIRCRAFT INSTRUMENTS USING A LASER SENSOR - A method for correcting an ambient pressure measurement, a method for calculating a temperature, and an apparatus for affecting the same for an aircraft measuring system are provided. The methods include the steps of receiving an airspeed measurement from a laser sensor, receiving a total pressure measurement, and calculating an ambient pressure correction. A corrected ambient pressure or a calculated temperature may be calculated. The apparatus includes a laser sensor configured to provide an airspeed measurement, an aircraft instrument configured to provide a total pressure measurement, and a processing system. | 04-02-2015 |
20150100265 | METHOD FOR COMPENSATING A SIGNAL FROM A PRESSURE MEASUREMENT DEVICE WITHIN AN INTERNAL COMBUSTION ENGINE - A method for processing a signal (S | 04-09-2015 |
20150127287 | DETERMINING CALIBRATED MEASUREMENTS OF PRESSURE FOR DIFFERENT SENSORS - Systems and methods for calibrating individual pressure sensors using mathematical models to compensate for inaccurate measurements of pressure from those pressure sensors are described. Also described are systems and methods for applying those mathematical models to adjust measurements from those pressure sensors during position computations. | 05-07-2015 |
20150300906 | BOOM CALIBRATION SYSTEM - A method of calibrating strain sensors operatively associated with a machine may involve the steps of: Calculating, for each of n loading conditions, at least one structural load associated with at least one member of the machine to produce n calculated structural loads corresponding to the n loading conditions; measuring, for each of n machine positions, at least one strain associated with the at least one member of the machine to produce n measured strains corresponding to the n loading conditions; and determining curve fit parameters from said n calculated structural loads and said n measured strains, the curve fit parameters relating measured strain and structural loads over n loading conditions. | 10-22-2015 |
20150338304 | ALGORITHM FOR DETECTING ACTIVATION OF A PUSH BUTTON - The invention relates to an algorithm for detecting activation of a tactile pressure sensor having a mechanic structure, acquisition electronics, and a specific sensor behavior. The algorithm includes (a) measuring an input quantity (f | 11-26-2015 |
20160041058 | SYSTEM AND METHOD TO ADJUST A FORCE ZERO REFERENCE - A system and method of adjusting a zero reference may comprise retracting ram of an actuator coupled to a load cell from a first position to a second position. The system and method may comprise reporting a measurement by a load cell, in response to the actuator being in a second position. The system and method may comprise calculating a force being measured by t the load cell. The system and method may comprise creating a zero reference offset value based on the calculation, in response to the force calculation resulting in a non-zero force calculation. The system and method may comprise adjusting a zero reference value of the load cell by the zero reference offset value. | 02-11-2016 |
20160069767 | PHYSICAL QUANTITY SENSOR ADJUSTMENT METHOD, AND PHYSICAL QUANTITY SENSOR - A physical quantity sensor includes a detector that outputs a detection signal in response to an input to a device, and a controller that outputs a signal corresponding to the input to the device based on the detection signal. A method for adjusting the physical quantity sensor is performed based on a value of the detection signal in a steady state and a fluctuation of a value of the detection signal within a predetermined duration. The physical quantity sensor has a first threshold for the value of the detection signal for determining presence or absence of the input, and a second threshold for the fluctuation of the value of the detection signal within a predetermined duration for determining presence or absence of the noise in the detection signal. In this method, a first process for increasing at least one of the first threshold and the second threshold is executed in a case that the value of the detection signal is within a range of the first threshold and that the fluctuation of the detection signal within the predetermined duration is out of a range of the second threshold. This method for adjusting the physical quantity sensor reduces effects of external factors. | 03-10-2016 |
20160097693 | ALGORITHM TO CORRECT FOR OFFSET DRIFT IN CYCLIC SIGNALS - A method for correcting offset drift in a sensor used in cyclic sensing is provided. The method includes: identifying a target value for a parameter of a signal between sensing cycles of the sensor; ascertaining a difference between a measured value for the signal and the target value; ascertaining a duration between the sensing cycles; using the difference and the duration, calculating a number of steps to attain the target value from the measured value; and adjusting the measured value by the number of steps to substantially agree with the target value. A pressure sensor is disclosed. | 04-07-2016 |
20160102995 | OPPORTUNISTIC CALIBRATION OF A BAROMETER IN A MOBILE DEVICE - Disclosed are systems, methods and techniques for calibrating a barometric pressure sensor of a mobile device. In one embodiment, a barometric pressure sensor of a mobile device may be calibrated by determining that a location of the mobile device is on a particular discrete vertical of a plurality of discrete vertical levels. | 04-14-2016 |
20160131550 | METHOD AND APPARATUS FOR CALIBRATING PRESSURE SENSOR INTEGRATED CIRCUIT DEVICES - In an embodiment, a method for calibrating a pressure sensor device is disclosed. The method involves determining the resonant frequency of a membrane of the pressure sensor device after the pressure sensor device has been attached to a circuit board, calculating a change in the resonant frequency from a resonant frequency stored in memory, calculating strain of the membrane of the pressure sensor device from the change in resonant frequency, and calibrating the pressure sensor device based on a capacitance-to-pressure curve calculated using the strain of the membrane of the pressure sensor device. | 05-12-2016 |