Class / Patent application number | Description | Number of patent applications / Date published |
073708000 | With pressure and/or temperature compensation | 59 |
20080210012 | Temperature Compensating Pressure Sensor Having Active And Reference Membranes - Provided is a temperature compensating pressure sensor. The sensor includes a silicon substrate having sealed channels on which is deposited a CMOS layer, and a conductive layer and a passivation layer deposited on the CMOS layer, the conductive layer representing a first electrode. The sensor also includes a conductive active membrane spaced from the conductive layer to form an active chamber, and a conductive reference membrane spaced from the conductive layer to form a sealed reference chamber. Also included is a cap which covers the membranes, said cap having a channel to expose the active membrane to an outside fluid pressure, with the membranes representing a second electrode. The active membrane deflects due to differential stresses so that the first and second electrodes develop a capacitance C between them depending on the electrical permittivity of the fluid, with the reference membrane providing a temperature compensating reference capacitance. | 09-04-2008 |
20080216579 | Personalized gauge kit and method of using - The present invention is a kit for making an automotive gauge with personalized gauge faces that may be interchanged via an in situ removable front cover plate. The kit provides a gauge having a dust proof sealing front cover plate that may be unscrewed from the gauge body and a keyed removable indicating needle that allows a personally stylized gauge face to be installed. The face of the gauge is constructed through the use of a personal computer and printer in conjunction with a software program, provided with the kit, that allows the user to personally design the gauge face. | 09-11-2008 |
20090044630 | TEMPERATURE COMPENSATED MINIATURE PRESSURE SENSOR - The present invention relates to a temperature-compensated pressure sensor assembly for fitting within the valve stem of a vehicle tire. The assembly includes a substrate assembly defining a plurality of holes. A pressure sensor is mounted to the substrate assembly. The pressure sensor includes a first deflectable membrane defining a first chamber and a first cap mounted to the membrane to form a second chamber. A temperature compensation sensor is mounted to the substrate assembly. The temperature compensation sensor includes a second deflectable membrane mounted to the substrate assembly to define a third chamber and a second cap mounted to the other membrane to form a fourth chamber. | 02-19-2009 |
20090049922 | Pressure-measuring device - A pressure-measuring device has an initial pressure-measuring cell ( | 02-26-2009 |
20090056460 | TEMPERATURE COMPENSATING PRESSURE SENSOR - A temperature compensating pressure sensor arrangement includes a capacitive pressure sensor having a substrate carrying CMOS layers. A conductive membrane is arranged on the substrate and defines a reference chamber such that capacitance changes resulting from displacement of the conductive membrane can be converted to pressure change values. A cap covers the conductive membrane and has openings to permit pressure changes to be detected by the conductive membrane. A capacitive temperature sensor is operatively arranged with respect to the capacitive pressure sensor and has a conductive membrane arranged on the substrate and defines a reference chamber such that capacitance changes resulting from displacement of the conductive membrane can be converted to temperature change values. The conductive member defining openings and cap covers and seals the conductive membrane from an external environment. | 03-05-2009 |
20090064788 | Pressure Transducer With Eccentric Sleeve for Adjusting the Position of a Pressure Port - This invention relates to a pressure measuring instrument, as well as a dedicated liner, especially for subsea use and adapted for coupling to a pressurized medium in a container or pipe through at leas tone opening therein and thus measure the pressure in the medium at this location, wherein the pressure measuring instrument is provided with at least one insertion part for positioning in said opening, the insertion part comprising a outward protruding liner, said liner being rotatably coupled to the insertion part and having an inner cylindrical or conical surface and an outer cylindrical or conical surface, said inner and outer surfaces having non-coinciding parallel or essentially parallel centre axis. | 03-12-2009 |
20090064789 | TEMPERATURE COMPENSATING PRESSURE SENSING ARRANGEMENT - The invention provides for a temperature compensating pressure sensing arrangement. The arrangement includes a substrate having sealed channels on which is deposited a CMOS layer, with a conductive layer and a passivation layer deposited on the CMOS layer. The arrangement also includes a conductive active membrane spaced from the conductive layer to form an active chamber, and a conductive reference membrane spaced from the conductive layer to form a sealed reference chamber. Further included is a cap which covers the membranes, said cap exposing the active membrane to an outside fluid pressure. The active membrane further defines a foot which is located between the substrate and cap with a leg extending away from the substrate and terminating in a substantially planar deflectable portion, which deflects due to differential pressure stresses so that an active capacitance is developed between the active membrane and the conductive layer depending on the electrical permittivity e of the fluid. The reference membrane provides a temperature compensating reference capacitance. The arrangement also has sensor circuitry configured to determine a charge imbalance indicative of a pressure difference between the active and reference membranes. | 03-12-2009 |
20090071257 | PRESSURE VESSEL TESTING - A method for determining the maximum allowable working pressure of a microchannel device, particularly a diffusion-bonded, shim-based microchannel device operating at a temperature greater to or equal to a base material threshold temperature where significant creep may predominate, and when employing non-traditional materials of construction, when non-traditional fabrication or joining methods are used, or when spurious artifacts arise. | 03-19-2009 |
20090126498 | Pressure sensor device - The invention relates to a pressure sensor device comprising a membrane body in the form of a membrane whose first side is exposed to a working medium whereas the second side thereof is arranged oppositely to the first side. The inventive device also comprises at least one pressure sensor element ( | 05-21-2009 |
20090193902 | Gas Pressure Sensor With Temperature Compensation - A pressure sensor for sensing a fluid pressure comprising: a first chamber including a first conductive membrane, wherein a fluid is sealed within the first chamber at a reference pressure such that the first conductive membrane deflects from pressure differences between the reference and the fluid pressure; a second chamber including a second conductive membrane sealed from the fluid pressure, wherein the second membrane deflects in response to a change in temperature which the pressure sensor is exposed thereto; and a circuit in electrical communication with the first and second conductive membrane, the circuit being configured to obtain a first and second signal from the first and second conductive membranes respectively, the first and second signals being indicative of the deflection of the first and second conductive membranes, wherein the circuit adjusts the first signal by the second signal to generate an output signal indicative of the fluid pressure. | 08-06-2009 |
20090199646 | OPTICAL FIBER THERMOMETER AND TEMPERATURE-COMPENSATED OPTICAL FIBER SENSOR - This optical fiber thermometer includes one optical fiber for projection that relays light from the light source to a measuring unit, two optical fibers for light-reception that relay light reflected from a reflecting face of a mirror provided at the measuring unit to two light-receiving units, and an arithmetic processing circuit that calculates the pressure of the measuring unit from the ratio of electrical signals from the two light-receiving units; end surfaces of three optical fibers arranged to face the reflecting face being fixed such that an angle θ between the longitudinal direction of the optical fibers and the normal to the reflecting face is not zero, the two optical fibers for light-reception being parallel, fixing angles between each of them and the optical fiber for projection being symmetrical based on the normal to the reflecting face as a reference, and each of the optical fibers being a single-mode fiber at the wavelength being used, According to this invention, it is possible to provide an optical fiber thermometer that is inexpensive and can measure temperature with high precision, and a temperature-compensated optical fiber sensor that uses the optical fiber thermometer in compensating measurement error due to temperature-change, and can achieve highly precise measuring. | 08-13-2009 |
20090249882 | PRESSURE SENSOR ASSEMBLY FOR MEASURING ABSOLUTE PRESSURE - An absolute pressure transducer for outputting a signal indicative of an absolute pressure of a process to be measured is provided. The pressure transducer consists of a pressure-tight pressure port, which is connectable to the process, a housing accommodating pressure sensors and a common circuit board, a first pressure sensor, which analogically detects a difference between the process pressure and an ambient pressure inside the housing, a second pressure sensor, which detects the ambient pressure inside the housing as an absolute pressure, and the common circuit board, which is connected to both the first pressure sensor and the second pressure sensor and furthermore has a data processing unit. Here, the second pressure sensor is adapted to issue an electronic signal indicative of the ambient pressure. The circuit board converts the analogically detected pressure difference into a digital signal, determines the absolute pressure of the process based on the signals from the first and second pressure sensors and outputs a signal indicative of the absolute pressure of the process. | 10-08-2009 |
20090293624 | HYDRAULIC/PNEUMATIC CHARGING VALVE WITH INTEGRATED PRESSURE TRANSDUCER - The present invention is a device that allows the pressure inside an aircraft landing gear shock strut to be measured. A charging valve is modified by integrating a small pressure sensing device into the stem of the part such that the active diaphragm is subjected to the pressure within the charged vessel. The wires from the pressure sensing device are connected to a receptacle or connector in the bore of the stem such that a corresponding electrical receptacle may be mated for the purposes of making a measurement. The internal receptacle is designed such that the flow of air or oil is not excessively impeded and normal servicing tools do not interfere with the receptacle. | 12-03-2009 |
20090293625 | TEMPERATURE COMPENSATION OF A MULTIVARIABLE PRESSURE TRANSMITTER - A multivariable process fluid pressure transmitter includes an electronics module and a sensor module. The sensor module is coupled to the electronics module. A process fluid temperature sensor is coupled to the process fluid pressure transmitter. A differential pressure sensor is disposed within the sensor module and is operably coupled to a plurality of process fluid pressure inlets. A static pressure sensor is also disposed within the sensor module and is operably coupled to at least one of the process fluid pressure inlets. A first temperature sensor is disposed within the sensor module and is configured to provide an indication of a temperature of the differential pressure sensor. A second temperature sensor is disposed within the sensor module and is configured to provide an indication of a temperature of the static pressure sensor. Measurement circuitry is operably coupled to the differential pressure sensor, the static pressure sensor, and the first and second temperature sensors. A processor is coupled to the measurement circuitry and is configured to provide a compensated differential pressure output based on a measurement of the differential pressure sensor and the first temperature sensor, and to provide a compensated static pressure output based on a measurement of the static pressure sensor and the second temperature sensor. | 12-03-2009 |
20090293626 | PRESSURE SENSOR WITH TEMPERATURE COMPENSATION - The invention provides for a pressure sensor with compensation for temperature variations. The sensor has CMOS layers deposited on a substrate, a conductive layer connected to the CMOS and a passivation layer deposited on the CMOS layers. The arrangement also includes a conductive active membrane spaced from the conductive layer to form an active chamber, and a conductive reference membrane spaced from the conductive layer to form a sealed reference chamber. Further included is a cap which covers the membranes, said cap exposing the active membrane to an outside fluid pressure. The active membrane further defines a foot which is located between the substrate and cap with a leg extending away from the substrate and terminating in a substantially planar deflectable portion, which deflects due to differential pressure stresses so that an active capacitance is developed between the active membrane and the conductive layer depending on the electrical permittivity e of the fluid. The reference membrane provides a temperature compensating reference capacitance. The arrangement also has sensor circuitry configured to determine a charge imbalance indicative of a pressure difference between the active and reference membranes. | 12-03-2009 |
20100050775 | PRESSURE SENSOR FOR MEASUREMENTS IN HOT, DYNAMIC PROCESSES - The invention relates to a pressure sensor for measurements in hot, dynamic processes. The pressure sensor comprises a cylindrical housing in which a measuring element is located, and a round or annular membrane having at least one outer support. The outer support is arranged on the housing, offset behind a housing extension. The measuring element is adapted to acquire measurement data as a result of an axial displacement of the membrane. The housing extension is provided with a heat shield which is arranged, except on its edges, interspaced behind a gap. | 03-04-2010 |
20100095776 | Field device with integrated temperature control - A field device with integrated temperature control comprises a housing, a temperature sensor, a controller and a terminal block. The housing encloses internal components of the field device. The temperature sensor and the controller are located inside the housing. The temperature sensor senses an internal temperature of the field device, and the controller controls the internal temperature by regulating heat supplied to the field device. The terminal block connects to the controller in order to regulate the heater power as a function of the internal temperature. | 04-22-2010 |
20100107769 | SENSOR MODULE AND METHOD FOR PRODUCING A SENSOR MODULE - A sensor module is provided having a sensor element, a housing and a substrate, the sensor element being situated on the substrate and the sensor element is provided to be at least partially embedded in the housing; and the sensor module further having a compensation element for compensating for thermal deformations of the housing; the housing being essentially situated between the substrate and the compensation element. | 05-06-2010 |
20100139407 | PRESSURE GAUGE - The invention relates to a pressure measuring device ( | 06-10-2010 |
20100192694 | PRESSURE SENSOR INCLUDING THERMAL SELFTEST - A semiconductor device includes a diaphragm, a sensing element, and a circuit. The sensing element is configured to sense deflection of the diaphragm. The circuit is configured to heat the diaphragm to induce deflection of the diaphragm. | 08-05-2010 |
20100199775 | Method for temperature compensation of a piezoresistive gaged metal diaphragm - There is described a temperature compensation scheme for a pressure sensitive metal diaphragm transducer. The transducer employs a Wheatstone bridge fabricated from p-type piezoresistors. The Wheatstone bridge is glassed directly onto the metal diaphragm. As the temperature of operation increases, the diaphragm exhibits a temperature variation of the Modulus of Elasticity. The Modulus of the metal diaphragm decreases with increasing temperature. Because of this, the same pressure applied to the metal diaphragm causes it to deflect further, which in turns causes increased strain applied to the bridge. Because of this effect, the sensitivity of the transducer increases with increasing temperature. A resistor is now placed in series with the Wheatstone bridge. The resistor is in series with the biasing voltage and because the TCS of the diaphragm is of an opposite sign, the series resistor has an even higher TCR in series with the bridge. In this manner, the bridge voltage is made to decrease with increasing temperature. Due to the fact that the bridge voltage decreases with increasing temperature the change in voltage compensates for the change in the Modulus of the metal diaphragm and therefore provides an accurate output at all temperatures. | 08-12-2010 |
20100218611 | SEMICONDUCTOR PRESSURE SENSOR AND MANUFACTURING METHOD THEREOF - A semiconductor pressure sensor includes a silicon substrate, an active gauge resistance forming portion having a first diaphragm and a first gauge resistance formed on the silicon substrate, and a dummy gauge resistance forming portion for temperature compensation having a second diaphragm and a second gauge resistance, formed on the substrate. The first diaphragm of the active gauge resistance forming portion and the second diaphragm of the dummy gauge resistance forming portion for temperature compensation are formed of a common polysilicon film. The polysilicon film has an anchor portion to be connected to the substrate. The first and second diaphragms have mutually identical or symmetrical structures and the first and second gauges have mutually identical or symmetrical structures. Accordingly, a semiconductor pressure sensor capable of highly accurate temperature compensation and manufacturing method thereof can be provided. | 09-02-2010 |
20110094305 | AIR PRESSURE SENSOR FOR IMPACT RECOGNITION - An air pressure sensor ( | 04-28-2011 |
20110100129 | MEASURING CELL AND A METHOD OF USE THEREFOR - The present invention is a measuring cell comprising a base body. Layered upon the base body is a measurement membrane having a first measuring element, a measurement device, and an intermediate membrane. The intermediate membrane is arranged between the measurement membrane and the base body, and a second measuring element is arranged thereon. When a pressure force is applied to the cell, the measurement membrane is directed outward and undergoes deformation with respect to the intermediate membrane as well as the base body. The deformation causes the measuring capacitance formed by the measuring electrodes to change according to the pressure applied. | 05-05-2011 |
20110100130 | MEASURING CELL AND A METHOD OF USE THEREFOR - The present invention is a measuring cell with a base body, a measurement membrane which is arranged on the base body, and a measurement device, where a clearance between the measurement membrane and the base body is filled with a fluid which presents an increased heat conductivity (κ) compared to air. | 05-05-2011 |
20110132096 | PRESSURE SENSOR WITH ON-BOARD COMPENSATION - The present disclosure relates generally to pressure sensors, and more particularly, to methods and apparatus for compensating pressure sensors for stress, temperature and/or other induced offsets and/or errors. In one illustrative embodiment, a pressure sensor may include a pressure sensing die mounted to a substrate of a pressure sensor package. The pressure sensor die may include on-board compensation. In some instances, the on-board compensation may include an on-board heating element and an on-board zener diode trim network, both situated on or in the pressure sensing die. The zener diode trim network may include one or more zener diodes and one or more resistive elements, where the zener diodes can be selectively activated to “trim” the resistive network to compensate for one or more offsets and/or errors of the pressure sensor. The on-board heating element may be configured to heat the pressure sensor assembly to various temperatures so that temperature related offsets and/or errors may be identified, and then compensated for with the zener diode trim network. | 06-09-2011 |
20110167917 | HOUSING FOR A DRIVE DEVICE, DRIVE DEVICE AND METHOD FOR TESTING THE TIGHTNESS OF A PRESSURE COMPENSATING MEMBRANE - The invention relates to a housing ( | 07-14-2011 |
20110203379 | PRESSURE COMPENSATOR - A pressure compensator is configured to compensate for volume variations of an insulation medium of a subsea installation. The pressure compensator includes a first bellows chamber having walls and a first bellows part. The first bellows chamber is in flow connection with an insulation medium chamber of the subsea installation, and the walls of the first bellows chamber are configured to separate the insulating medium from surroundings. The first bellows chamber is surrounded by a second bellows chamber having walls and a second bellows part. The second bellows chamber is configured to form a closed intermediate space around the first bellows chamber. The walls of the second bellows chamber are configured to separate at least the bellows parts of the first bellows chamber from the surrounding sea water. The second bellows chamber is further filled with an intermediate medium. | 08-25-2011 |
20110308321 | DUAL PHYSICAL QUANTITY SENSOR - A pressure sensor for detecting a pressure of a first object to be measured; a pressure sensor for detecting a pressure of a second object to be measured; a temperature sensor for detecting the temperature of the pressure sensor and the pressure sensor; a first correcting portion for executing a correction that eliminates a fluctuation portion, due to a change in temperature, from the detection signal of the pressure sensor, and for outputting the signal, after the correction, as a measurement signal for the first object to be measured; and a second correcting portion for executing a correction that eliminates a fluctuation portion, due to a change in temperature, from the detection signal of the pressure sensor, and for outputting the signal, after the correction, as a measurement signal for the second object to be measured; wherein the temperature sensor is integrated with the pressure sensor and the pressure sensor so as to be in a state of mutual contact. | 12-22-2011 |
20120000292 | PRESSURE MEASURING DEVICE AND METHOD FOR ASCERTAINING PRESSURE VALUES - A pressure measuring device includes a pressure sensor element and an analog-digital converter. An output signal voltage of the pressure sensor element is a function of a temperature and is applied as an input voltage to an input of the analog-digital converter. The analog-digital converter is adapted to convert any input voltage from input voltage ranges which vary with a temperature into a digital value representing the input voltage. | 01-05-2012 |
20120073377 | ENHANCED STATIC-DYNAMIC PRESSURE TRANSDUCER SUITABLE FOR USE IN GAS TURBINES AND OTHER COMPRESSOR APPLICATIONS - A transducer comprising a filter assembly that measures low amplitude, dynamic pressure perturbations superimposed on top of a high static pressure through the implementation of a low-pass mechanical filter assembly. The filter assembly may comprise a dual lumen reference tube and a removable filter subassembly further comprising a porous metal filter and narrow diameter tube. The transducer, which may be capable of operating at ultra-high temperatures and in harsh environments, may comprise of a static piezoresistive pressure sensor, which measures the large pressures on the order of 200 psi and greater, and an ultrasensitive, dynamic piezoresistive pressure sensor which may capture small, high frequency pressure oscillations on the order of a few psi. The filter assembly may transmit static pressure to the back of the dynamic pressure sensor to cancel out the static pressure present at the front of the sensor while removing dynamic pressure. | 03-29-2012 |
20120103101 | SYSTEMS, METHODS, AND APPARATUS FOR COMPENSATING ATMOSPHERIC PRESSURE MEASUREMENTS IN FIRED EQUIPMENT - Certain embodiments of the invention may include systems, methods, and apparatus for providing compensating atmospheric pressure measurements in fired equipment. According to an example embodiment of the invention, a method is provided compensating pressure measurements. The method includes providing a wind compensating ring tube having three or more apertures to equalize pressure inside the compensating ring tube, installing the wind compensating ring tube adjacent to a furnace, connecting a pressure transmission tube from the wind compensating ring tube to one or more pressure sensors, and transmitting pressure from inside the wind compensating ring tube to the one or more pressure sensors by the pressure transmission tube. | 05-03-2012 |
20120118065 | METHOD FOR PRESSURE MEASUREMENT IN THE CASE OF VARIABLE TEMPERATURES AND PRESSURE MEASURING SENSOR FOR PRESSURE MEASUREMENT IN THE CASE OF VARIABLE TEMPERATURES - A method for the compensating temperature gradient influences on a pressure measuring transducer, comprising the steps of: registering a pressure signal S | 05-17-2012 |
20120247216 | PRESSURE SENSOR DEVICE - A pressure sensor device has a sensor detecting pressure of a gas that is introduced from the outside, a heater for heating the sensor, a package containing the sensor and the heater, a circuit portion producing an output signal that represents the pressure of the gas based on the detection output detected by the sensor, and a circuit containing portion containing the circuit portion. The package and the circuit containing portion are structured from separate cases and are disposed separately with a connecting structural member interposed therebetween. The connecting structural member | 10-04-2012 |
20120260738 | MEASURING CELL WITH A CASING FOR HOUSING A SENSOR, IN PARTICULAR A PRESSURE TRANSDUCER - The invention relates to a measuring cell with a casing for housing a sensor, in particular a pressure transducer, in which the casing has a pressure compensation vent for the sensor; and is provided with a sealing element with an axisymmetrical circumferential surface arranged proximate an internal surface of a casing bore formed operably and complementary hereto, and that the pressure compensation vent is formed as at least one gap resistant to ignition flashovers by interaction of a strip-shaped and plane surface section extending along the casing bore on the circumferential surface of the sealing element with the internal surface of the casing bore. | 10-18-2012 |
20120285253 | AUTOMATIC CALIBRATION PROCEDURE OF TEMPERATURE COMPENSATION FOR DIGITAL PRESSURE GAUGES - An automatic operation method for setting temperature compensation coefficients of a digital pressure gauge is revealed. Primarily, a microcontroller unit (MCU) in the pressure gauge is equipped with built-in calibration procedures. The gauge is placed into a temperature-controlled chamber in order to obtain the temperature coefficient of offset (Tco) and temperature coefficient of span (Tcs). This method is the automatic measuring outputs of zero pressure/full scale at two temperatures to calculate the temperature coefficients Tco/Tcs. The two temperature compensation coefficients are stored in the MCU inside the pressure gauge. As the pressure gauge operates in any working temperature environments, the gauge based on a certain algorithm formula with the two stored temperature coefficients shows an accurate pressure reading. | 11-15-2012 |
20130000411 | PRESSURE MEASUREMENT DEVICE HAVING AN OPTIMIZED SENSITIVITY - A MEMS and/or NEMS pressure measurement device comprising a deformable membrane suspended on a substrate, one of the faces of the membrane being intended to be subjected to the pressure to be measured, detection means with strain gauges for the deformation of the membrane, said detection means being formed on a substrate and a non-deformable arm, transmitting the deformation in an amplified manner of the membrane to the detection means, the arm being rotatably hinged to the substrate about an axis (Y) substantially parallel to the plane of the membrane and which is integral with the membrane so that it transmits a deformation of the membrane to the detection means in an amplified manner. | 01-03-2013 |
20130008255 | TEMPERATURE EXTRACTION FROM A PRESSURE SENSOR - Circuits, methods, and systems to compensate pressure sensor readings for changes in temperature. An example measures temperature in a field-effect-transistor-based pressure sensor or micro-electromechanical system by measuring the device's threshold voltage. This threshold voltage is linearly dependent on the temperature but shows negligible sensitivity to mechanical stress. This allows the pressure sensor's temperature to be determined in an environment of changing pressure. Once the temperature is known, the pressure sensor's pressure readings can be adjusted. The threshold voltage can be extracted by measuring the turn-on transistor characteristic of the device and using device models. Alternately, the threshold voltage can be extracted using threshold voltage extraction circuits. | 01-10-2013 |
20130086989 | Sensor Device - In various embodiments, a sensor device is provided. The sensor includes a sensor receiving portion, a sensor arranged in the sensor receiving portion and a cap covering the sensor and the sensor receiving portion. The cap includes a plurality of recesses in the inner side wall of the cap for reducing the pressure measured by the sensor. | 04-11-2013 |
20130305830 | PRESSURE SENSOR ELEMENT - [Problem] To provide a pressure sensor element which is not greatly decreased in the resistance due to temperature increase. | 11-21-2013 |
20130305831 | TEMPERATURE-INDEPENDENT TURGOR PRESSURE MEASUREMENT DEVICE, METHOD FOR PRODUCING SAID MEASUREMENT DEVICE, AND A METHOD FOR TEMPERATURE COMPENSATION FOR SAID MEASUREMENT DEVICE - The invention relates to a clamp element for a temperature-independent turgor pressure measurement device for measuring the turgor pressure in a plant sample. | 11-21-2013 |
20140000376 | PRESSURE SENSING DEVICE WITH STEPPED CAVITY TO MINIMIZE THERMAL NOISE | 01-02-2014 |
20140020471 | CARBON NANOTUBE TEMPERATURE AND PRESSURE SENSORS - The present invention, in one embodiment, provides a method of measuring pressure or temperature using a sensor including a sensor element composed of a plurality of carbon nanotubes. In one example, the resistance of the plurality of carbon nanotubes is measured in response to the application of temperature or pressure. The changes in resistance are then recorded and correlated to temperature or pressure. In one embodiment, the present invention provides for independent measurement of pressure or temperature using the sensors disclosed herein. | 01-23-2014 |
20140069197 | CAPACITIVE PRESSURE SENSOR - High temperature pressure sensing devices and methods are disclosed. In some embodiments, a high temperature pressure sensor including intrinsic zero output and span correction versus temperature is disclosed. In addition, ways in which to improve high temperature performance through the use of intermediate circuits located towards the distal end of the high temperature pressure sensor as well as configurations to reduce thermally induced stresses within the pressure sensor are disclosed. The disclosed embodiments also detail ways in which to reduce signal loss due to various stray capacitances within the pressure sensor to improve signal fidelity and sensitivity. | 03-13-2014 |
20140076056 | SELF-HEATED PRESSURE SENSOR ASSEMBLIES - The present invention provides a self-heated pressure sensor assembly and method of utilizing the same. The self-heated pressure sensor assembly regulates and maintains the temperature of the pressure sensor, regardless of the external temperature environment, without an external heater as in prior art embodiments. Exemplary embodiments of the pressure sensor assembly incorporate a resistance heater that is built into the sensing chip of the pressure sensor assembly. The pressure sensor assembly also utilizes the resistance of the pressure sensing elements to monitor the temperature of the assembly, which works alongside the resistance heater to maintain a stable temperature within the pressure sensor assembly. | 03-20-2014 |
20140116149 | Sensor with masking - A sensor may include a sensor membrane, wherein one side of the sensor membrane at least partly has a glob top and wherein the glob top furthermore has structurings. | 05-01-2014 |
20140137651 | SYSTEM AND METHOD FOR PASSIVELY COMPENSATING PRESSURE SENSORS - A temperature-compensated pressure sensor system includes a pressure sensing element, a temperature sensing device, and a temperature compensation network. The pressure sensing element provides a first voltage output representative of a sensed pressure value. The temperature sensing device provides a second voltage output representative of a sensed temperature value. The temperature compensation network is connected to receive the first voltage output provided by the pressure sensing element and the second voltage output provided by the temperature sensing device. The temperature compensation network provides a temperature compensated voltage representative of sensed pressure, wherein the second voltage output passively biases the temperature compensation network. | 05-22-2014 |
20140260644 | Modular Systems for Piezoresistive Transducers - The present invention relates to a modular system for sensing pressure and/or temperature. The system uses a piezoresistive transducer that contacts a fluid, a transducer housing for the piezoresistive transducer, a conductor tube, a transition housing, a cable, an adapter housing, a flex conductor, an electronic housing, wherein the transducer housing, the conductor tube, the transition housing, the cable, the adapter housing, the flex conductor, and the electronic housing protect a conductive path for electrical signal(s) from the piezoresistive transducer to the electronic housing. The system may use cable to couple the transition housing to the adapter housing sufficient in length to keep the transducer at the site of interest and the more sensitive electronic circuits away from high pressure, temperature, and/or RF/EMI environments such as that associated with down-hole drilling. In another embodiment, some or all the conductive path is multilayered wire. | 09-18-2014 |
20150114128 | SYSTEMS AND METHODS FOR COMPENSATING A SENSOR - Systems, methods, and apparatus for compensation of a sensor are presented. A method is provided that includes determining a response of a sensor. For example, a temperature response of a pressure sensor may be characterized. In an example implementation, the sensor may be coupled to one or more input terminals, for example, that are configured for connecting to an input voltage source. The sensor may also be coupled to one or more configurable resistor networks. The sensor may further be coupled to one or more output terminals configured for providing an output signal. The method further includes determining one or more compensation resistance values for compensating the determined response of the sensor. The method includes selectively configuring, based at least in part on determining the one or more compensation resistance values, the one or more configurable resistor networks for compensating the response of the sensor. | 04-30-2015 |
20150292971 | COMBINATION STATIC AND DYNAMIC PRESSURE TRANSDUCER EMPLOYING A MICRO-FILTER - A pressure transducer assembly that uses static pressure compensation to capture low-level dynamic pressures in high temperature environments. In one embodiment, a method comprises receiving, at a first tube, a pressure, wherein the pressure includes a static pressure component and a dynamic pressure component; receiving, at a micro-filter, the pressure; filtering, by the micro-filter, at least a portion of the dynamic pressure component of the pressure; outputting, from the micro-filter, a filtered pressure; receiving, at a first surface of a first sensing element, the pressure; receiving, at a second surface of the first sensing element, the filtered pressure; measuring, by the first sensing element, a difference between the pressure and the filtered pressure, wherein the difference is associated with the dynamic pressure component of the pressure; and outputting, from the first sensing element, a first pressure signal associated with the dynamic pressure component of the pressure. | 10-15-2015 |
20150369684 | Pressure Sensors Having Low Cost, Small, Universal Packaging - Pressure sensor package that includes: a pressure sensor support attached to an interconnect housing which is attached to a compensation support; wherein: (a) a pressure sensor device is attached to the pressure sensor support and is electrically connected to pads disposed on the pressure sensor support; (b) compensation circuitry is attached to the compensation support and is electrically connected to pads disposed on the compensation support; (c) connectors disposed in through holes in a wall of the interconnect housing are electrically connected to the pads on the pressure sensor support and to the pads on the compensation support; and (d) a pressure port is disposed in the pressure sensor support. | 12-24-2015 |
20160041056 | SELF-HEATED PRESSURE SENSOR ASSEMBLIES - The present invention provides a self-heated pressure sensor assembly and method of utilizing the same. The self-heated pressure sensor assembly regulates and maintains the temperature of the pressure sensor, regardless of the external temperature environment, without an external heater as in prior art embodiments. Exemplary embodiments of the pressure sensor assembly incorporate a resistance heater that is built into the sensing chip of the pressure sensor assembly. The pressure sensor assembly also utilizes the resistance of the pressure sensing elements to monitor the temperature of the assembly, which works alongside the resistance heater to maintain a stable temperature within the pressure sensor assembly. | 02-11-2016 |
20160054190 | PRESSURE TRANSMITTER WITH IMPULSE LINE PLUGGING DIAGNOSTIC - A pressure transmitter includes at least one impulse line for coupling a fluid pipe or tank to a pressure sensor that measures a process pressure of a process fluid, a temperature sensor measuring an ambient temperature, and a processor accessing baseline data for the process pressure and ambient temperature. The processor implements an automatic impulse line plugging diagnostic (ILPD) algorithm stored in memory. The processor runs the ILPD algorithm implementing utilizing process measurements including a process pressure from the pressure sensor and an ambient temperature from the temperature sensor, comparing a magnitude of the process pressure to a baseline pressure predicted from the baseline data corresponding to the ambient temperature, and uses results of the comparing to determine whether the impulse line is plugged. The comparing can involve comparing a process pressure change to a baseline pressure change predicted corresponding to an ambient temperature change. | 02-25-2016 |
20160054191 | Sintered body comprising a plurality of materials and pressure measuring instrument comprising such a sintered body - A sintered body comprises a first region which comprises a first material having a first effective coefficient of thermal expansion α | 02-25-2016 |
20160084725 | COOLING FOR INDUSTRIAL PROCESS VARIABLE TRANSMITTERS - A pressure transmitter assembly for measuring a process pressure of an industrial process includes a pressure sensor configured to sense the process pressure. A process coupling couples the pressure sensor to the industrial process. In one example configuration, a phase change material carried in the process coupling is configured to reduce heat transfer from the industrial process to the process variable sensor by changing phase in response to heat from the industrial process. In another example configuration, a thermocouple electric cooling element is coupled to the process coupling and configured to conduct heat away from the coupling in response to an applied electric current. | 03-24-2016 |
20160109315 | Compensated Pressure Sensors - Compensated pressure sensor includes a MEMS pressure sensor die having resistors RA and RD connected in series in a first leg of a Wheatstone bridge and resistors RB and RC connected in series in a second leg of the Wheatstone bridge; a first and second fuse; and a first, second third, fourth, fifth and sixth resistor; wherein: a first end of the first resistor is connected in series with the first leg of the bridge and a first end of the second resistor is connected in series with the second leg of the bridge; the first fuse is connected, at a first end, to a first output of the bridge, and at a second end, to a second end of the third resistor and to a first end of the second fuse; the second fuse is connected, at a second end, to a second output of the bridge; a first end of the third resistor is connected to an input to the bridge and to a first end of the fourth resistor; a second end of the fourth resistor is connected to a second end of the first resistor, a second end of the second resistor and a first end of the sixth resistor; and the fifth resistor is connected, at a first end, to the input to the bridge. | 04-21-2016 |
20160123831 | Differential Pressure Transmitter With Intrinsic Verification - A differential pressure transmitter is disclosed, which comprises a body for housing a high-pressure sensor and a low-pressure sensor, a plurality of high-pressure process connectors formed in said body and fluidly coupled to said high-pressure sensor for transmitting a first pressure of a process fluid to said high-pressure sensor, each of said high-pressure process connectors comprising a conduit having an opening for receiving the process fluid, a plurality of low-pressure process connectors formed in said body and fluidly coupled to said low-pressure sensor for transmitting a second pressure of a process fluid to said low-pressure sensor, each of said low-pressure process connectors comprising a conduit having an opening for receiving the process fluid, wherein said second pressure is equal to or less than said first pressure, wherein said openings of the high-pressure connectors are spaced relative to said openings of the low-pressure connectors to allow a plurality of pair-wise connections to the process fluid. | 05-05-2016 |
20170234748 | METHOD FOR DETERMINING A PRESSURE MEASUREMENT SIGNAL, AND A PRESSURE MEASUREMENT ARRANGEMENT FOR SAME | 08-17-2017 |
20190145841 | SELF-HEATED PRESSURE SENSOR ASSEMBLIES | 05-16-2019 |