With Pressure And/or Temperature Compensation Patents (Class 73/708)
  • Patent number: 10385754
    Abstract: An internal combustion engine fluidly coupled to an exhaust aftertreatment system that includes an exhaust purifying device is described. A pressure monitoring device is disposed to monitor a pressure differential between an inlet and an outlet of the exhaust purifying device. A method of monitoring the exhaust purifying device includes monitoring a pressure differential between an inlet and an outlet thereof, and determining an exhaust gas flowrate associated with operation of the internal combustion engine. A raw flow resistance is dynamically determined based upon the pressure differential and the exhaust gas flowrate, and an estimated flow resistance is determined based upon the raw flow resistance. The exhaust purifying device is evaluated based upon the estimated flow resistance.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: August 20, 2019
    Assignee: GM Global Technology Operations LLC
    Inventors: Raffaele Esposito, Alberto Giordano
  • Patent number: 10317299
    Abstract: A pressure sensor comprising at least a pressure measuring cell, a pressure balancer, as well as at least one measurement line to transfer a pressure applied to the pressure means to the pressure measuring cell, wherein the pressure sensor comprises at least one compensation line showing the same features as the measurement line, which is arranged parallel in reference to the measurement line.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: June 11, 2019
    Assignee: VEGA Grieshaber KG
    Inventor: Clemens Hengstler
  • Patent number: 10288511
    Abstract: The invention is a method for determining an output value, which is equivalent to a pressure or a value proportional to the pressure, comprising a relative pressure sensor with at least one measured capacity formed between a basic body and a measuring membrane and at least one reference capacity formed between the basic body and the measuring membrane, with the determination of the output value comprising at least the following steps: (1) determining the measured capacity, (2) determining the reference capacity, (3) comparing a value of a first function FZ of the reference capacity to the measured capacity and (4) issuing A=FQ(CM,CR) for CM=FZ(CR) A=FCR(CR) for CM>FZ(CR) A=FCM(CM) for CM<FZ(CR) as the output value.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: May 14, 2019
    Inventors: Bernhard Weller, Johannes Seiffe
  • Patent number: 10288515
    Abstract: A pressure difference sensor with at least one pressure difference measuring cell, at least a first pressure means, and at least a first measurement line for transferring a first pressure applied upon the first pressure means to a first side of the pressure difference measuring cell, characterized in that the pressure difference sensor comprises at least a first compensation line, which is arranged parallel to the first measurement line and is connected to a second side of the pressure difference measuring cell.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: May 14, 2019
    Inventor: Clemens Hengstler
  • Patent number: 10288527
    Abstract: A pressure sensing apparatus is provided for sensing gas pressure at a pressure tapping. The apparatus has a pressure sensor which provides a pressure measurement signal in response to the pressure of a gas admitted into the sensor at a gas inlet port thereof. The apparatus further has a gas conduit which extends from the inlet port. An end of the conduit distal from the inlet port is adapted to receive the gas at the pressure tapping. The apparatus further has a condenser on the gas conduit. The condenser contains condensation surfaces on which humidity in the gas flowing from the pressure tapping to the inlet port condenses out. In operation the temperature at the condenser is lower than at the pressure tapping.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: May 14, 2019
    Assignee: ROLLS-ROYCE PLC
    Inventor: Stuart James Kirby
  • Patent number: 10288513
    Abstract: A combined pressure and temperature sensing device includes a sensor port geometry that provides improved contact between a fluid media being measured and a thermistor cavity of the sensor port. The increased contact area provides improved response time and accuracy compared to previously known integrated pressure-temperature sensors. A temperature sensor element is offset from a pressure sensor element relative to a central axis of the temperature-pressure sensor body/package to facilitate substantially increasing a pressures sensor cavity volume without increasing the overall sensor port diameter. A wire-bondable thermistor support portion facilitates high volume automated production line. The temperature sensing element may be resistance welded to the thermistor support portion in a parallel manufacturing process.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: May 14, 2019
    Assignee: Sensata Technologies
    Inventors: Jun H. Bae, Nikhil B. Lal, Guanshi Li, Shuo Robert Chen, Mark W. McBrine
  • Patent number: 10247615
    Abstract: A sensor assembly is provided that allows for a more rapid sensing of thermal changes. In preferred embodiments, the sensor assembly includes a housing, sensor package, bushing, coupling and gasket. The bushing is made from a conductive material like copper or silver and provides a conductive path from the bottom of the sensor package directly into the medium whose temperature is to be sensed or close thereto. A coupling is provided between the conductive bushing the metal housing to prevent heat exchange between the metal housing and the bushing. The gasket is placed in compression and provides a constant force holding the conductive bushing against the bottom of the sensor package.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: April 2, 2019
    Assignee: DUNAN SENSING, LLC
    Inventors: Claudio Martinez, Danny (Duy) Do
  • Patent number: 10240993
    Abstract: A pressure sensor for recording a pressure of a fluid medium in a measuring cell. The pressure sensor includes a sensor housing, at least one first pressure sensor element for measuring a pressure of the medium, and a drive and/or evaluation circuit for outputting a signal indicative of a pressure acting on the first pressure sensor element. The drive and/or evaluation circuit is configured on or in a circuit substrate disposed within the sensor housing. The first pressure sensor element is configured on or in the circuit substrate and is separated from the fluid medium by at least one first separating membrane.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: March 26, 2019
    Inventors: Alexander Lux, Patrik Patzner
  • Patent number: 10215655
    Abstract: A pressure sensor assembly having a sensor unit, a pressure port, and an electrical connector. The sensor unit may include a printed circuit board (PCB), a pressure sensor, a support, and a media isolation layer. The PCB may have a first side and an opposite second side, where the pressure sensor may be secured to the first side. The support may also be secured to the first side of the PCB and may circumferentially surround the pressure sensor and/or may define a media sensing opening. The media isolation layer (e.g., a gel or other material) may be provided in the media sensing opening and encase the pressure sensor, where the media isolation layer may transfer a pressure provided by the media in the pressure port to the pressure sensor and may act as a barrier between the media and the pressure sensor.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: February 26, 2019
    Assignee: Honeywell International Inc.
    Inventors: Todd Eckhardt, Lamar Floyd Ricks
  • Patent number: 10184910
    Abstract: A sensor device package includes a pressure sensor and a humidity sensor mounted on the same substrate and in the same housing with light protection for the pressure sensor a media opening for gas exchange for the humidity sensor. Light protection and rapid response times are provided through strategic positioning of the media opening, strategic arrangement of the pressure sensor, humidity sensor, and the media opening, and/or the use of opaque materials.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: January 22, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Gerhard Lammel, Sibylle Waffenschmidt, Ando Feyh, Gary O'Brien, Andrew Graham
  • Patent number: 10184855
    Abstract: Disclosed is a pressure detecting device having a temperature sensor, the device including: a housing having a first chamber, a second chamber, and a port part having a fluid guide tube that guides a pressure transmitting fluid to the second chamber; a lead frame coupled to the housing and configured for being connected to an external device; a circuit substrate electrically connected to the lead frame and including a first surface and a second surface; a pressure detecting element provided on the second surface of the circuit substrate and generating an electrical signal according to a pressure change; a tube coupled to the port part, whereby a first end of the tube is open and provided inside the first chamber; and a temperature detecting element provided inside the tube and transmitting an electrical signal generated according to a temperature change to the circuit substrate.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: January 22, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Comet Network Co., Ltd.
    Inventors: Min Kyu Lee, Gi Young Nam, Dong Kyun Seo, Hwan Park, Sun Woo Choi, Sang Joo Kim, Jung Min Kim
  • Patent number: 10175137
    Abstract: A pressure measurement device has: a first chamber coupled to at least one fluid utilization unit, a second chamber coupled to a vacuum source, a seat with a passage for the fluid between the first and the second chamber, a plug for allowing or blocking the fluid flow through the passage, a retaining member for retaining the plug against the seat, a pressure sensor, and a measurement cavity coupled to the first chamber. The retaining member has a channel arranged to couple the first chamber and the measurement cavity.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: January 8, 2019
    Assignee: AKWEL SA
    Inventor: Marco Martino Spanevello
  • Patent number: 10161821
    Abstract: A pressure change measuring unit causes a temperature control unit to operate and vary the temperature of a sensor chip in a predetermined temperature range, and measures changes in pressure value output from the sensor chip whose temperature is being varied. A temperature characteristic calculating unit calculates a temperature characteristic of the sensor chip from changes in the temperature of the sensor chip caused by the operation of the temperature control unit and changes in pressure value measured by the pressure change measuring unit.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: December 25, 2018
    Inventors: Takuya Ishihara, Masaru Soeda, Masashi Sekine, Hidenobu Tochigi
  • Patent number: 10119888
    Abstract: A temperature sensor integrated type semiconductor pressure sensor apparatus includes a temperature detection device, a lead wire covered with a lead wire protection material, and a terminal, which are integrated together by a thermoplastic resin. This can prevent the lead wire from being deformed in the assembly process, thereby simplifying the assembly process. Furthermore, the temperature detection device is exposed from the opening at the tip of the protrusion, which can secure enough temperature response. Furthermore, the temperature detection device, the lead wire and the lead wire protection material are covered with the thermoplastic resin, so they are protected from combustion gas component, oil contaminant and corrosion product included in intake air.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: November 6, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventor: Hiroyuki Kishimoto
  • Patent number: 10094725
    Abstract: A production method for a detection apparatus includes: forming at least one sensitive region having at least one exposed sensing area on and/or in a semiconductor substrate, encapsulating at least one part of the semiconductor substrate so that the at least one sensing area is sealed in an air-, liquid- and/or particle-tight fashion from an external environment, and forming at least one opening so that at least one air, liquid and/or particle access from the external environment to the at least one sensing area is created, wherein before forming the at least one opening, at least one first test and/or calibration measurement is performed, for which at least one sensor signal of the at least one sensitive region having the at least one sensing area sealed in an air-, liquid- and/or particle-tight fashion is determined as at least one first test and/or calibration signal. Also described are related detection apparatuses.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: October 9, 2018
    Inventors: Jochen Reinmuth, Timo Lindemann
  • Patent number: 10063195
    Abstract: An amplifier circuit includes a converter configured to convert a predefined physical quantity to a resistance value, and the resistance value converted by the converter is converted to a voltage value and then amplified. The converter includes variable resistance sensors of piezoresistance elements. A bias unit is configured to determine a bias current of the converter, and includes bias resistances. An operation amplifier unit receives, as input signals, output signals from the bias unit and the converter, and includes feedback resistances respectively connected to input and output ends of a first operational amplifier. The first operational amplifier is a whole differential operational amplifier including a common-mode feedback circuit.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: August 28, 2018
    Assignee: Asahi Kasei Microdevices Corporation
    Inventors: Tomohiko Ogawa, Yoshihiko Koizumi
  • Patent number: 10048122
    Abstract: A pyranometer, comprises a thermal sensor, and a diffusing member positioned so as to be opposed to a receiving surface of the thermal sensor.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: August 14, 2018
    Inventors: Toshikazu Hasegawa, Akihito Akiyama, Naoto Shimada
  • Patent number: 10001424
    Abstract: A physical quantity detector includes: a bridge circuit portion that includes a bridge circuit including a first, second, third, and fourth strain gauges each having a resistance value that changes in response to an application of a physical quantity and to temperature, the bridge circuit portion outputting, as a first detection signal, a first voltage, and outputting, as a second detection signal, a second voltage; a temperature characteristic adjustment portion that is connected in parallel to the bridge circuit portion, and outputs, as a third detection signal, a third voltage corresponding to the input voltage; a first signal processing circuit portion that receives the first and second detection signals, and outputs a first differential voltage; and a second signal processing circuit portion that receives the second and third detection signals, and outputs a second differential voltage.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: June 19, 2018
    Inventors: Naoki Hasegawa, Kazuyuki Oono
  • Patent number: 9989432
    Abstract: An impedance sensor and an electronic apparatus using the same are provided. The impedance sensor includes an impedance-bridge circuit, a compensation circuit, and a signal processing circuit. The impedance-bridge circuit has an input side and an output side, and configured to generate a first impedance variation in response to a physical pressure. The compensation circuit is coupled to the input side of the impedance-bridge circuit in parallel, and configured to generate a second impedance variation in response to an environment temperature. The signal processing circuit respectively detects the first and the second impedance variations, and accordingly generates a first sensing signal indicating the first impedance variation and a second sensing signal indicating the second impedance variation, so as to compensate a temperature shift part of the first sensing signal by the second sensing signal and accordingly generate a pressure detection signal.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: June 5, 2018
    Assignees: PROLIFIC TECHNOLOGY INC., UniSense Technology Co., Ltd
    Inventors: Chiung-An Chen, Yun-Kuo Lee, Chih-Yuan Hung, Jia-Chun Huang, Yeow-Chin Chen, Shu-Fan Wu
  • Patent number: 9958337
    Abstract: A protective tube device can protect a temperature sensor against contact with a fluid, and has a distal end containing the temperature sensor and has an outer wall provided for contact with the fluid, and a proximal end which is connected to the temperature sensor by electric lines and is intended for arrangement outside the fluid, wherein, on the outer wall of the distal end, an elastic membrane closes off a resultantly defined pressure transmission fluid reservoir in a fluid-impermeable manner, the pressure transmission fluid reservoir being connected fluidically by a fluid channel running within the protective tube device to a pressure sensor arranged in the proximal end.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: May 1, 2018
    Assignee: ABB Schweiz AG
    Inventors: Guruprasad Sosale, Andrea Pozzi, Paul Szasz, Thomas Scholl, Wilhelm Daake
  • Patent number: 9784632
    Abstract: Sensor signal detection device includes: a sensor element; a temperature detection element connected in series with the sensor element; a constant voltage power supply applying constant voltage to a series circuit of the temperature detection element and the sensor element; a short-circuit switch short-circuiting both terminals of the temperature detection element; and a controller controlling a changeover between a sensor detection state and a temperature detection state. In the sensor detection state, a sensor signal from the sensor element is obtained by turning on the short-circuit switch to apply the constant voltage across both terminals of the sensor element from the constant voltage power supply. In the temperature detection state, a temperature detection signal of the temperature detection element is obtained by turning off the short-circuit switch to connect the temperature detection element to the sensor element in series and applying constant voltage from the constant voltage power supply.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: October 10, 2017
    Inventor: Toru Hirayama
  • Patent number: 9752404
    Abstract: A pressure compensator for a subsea device is provided. The pressure compensator provides pressure balancing between a chamber of the subsea device and the surrounding environment when the subsea device is installed at a subsea location. The pressure compensator includes an intermediate compensation chamber that is provided by a compensator enclosure. The compensator enclosure is sealed against the subsea environment. The compensator enclosure includes a bellows portion that is deformable to change the volume of the intermediate compensation chamber. The pressure compensator further includes a flexible hose disposed inside the intermediate compensation chamber. A volume inside the flexible hose provides a main compensation chamber.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: September 5, 2017
    Inventor: Fredrik Gundersen Aarskog
  • Patent number: 9638598
    Abstract: The invention relates to a capacitive pressure transducer for measuring the pressure of a medium adjacent to the pressure transducer, which has a resilient measuring diaphragm, of which the first side is at least partially in contact with the medium and of which the second side, which faces away from the medium, comprises a measuring electrode and, for measuring a temperature, a resistance element made of a material having a temperature dependent resistance. Furthermore, the pressure transducer has a base body, which is arranged to oppose the second side of the measuring diaphragm, with a counter electrode, which forms a measuring capacitance with the measuring electrode. According to the invention, the resistance element is formed as a resistive layer disposed between the second side of the measuring diaphragm and the measuring electrode.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: May 2, 2017
    Inventors: Josef Fehrenbach, Jörn Jacob
  • Patent number: 9568385
    Abstract: A semiconductor pressure sensor (720) includes a thin film piezoelectric element (701) which applies strain to a portion of a semiconductor substrate that corresponds to a thin region (402). The thin film piezoelectric element (701) is formed at a distance away from diffusion resistors (406, 408, 410, and 412) functioning as strain gauges and is extended to the proximity of a bonding pad (716A) connected to an upper electrode layer of the thin film piezoelectric element and a bonding pad (716F) connected to a lower electrode thereof. The diffusion resistors (406, 408, 410, and 412) constitute a bridge circuit by metal wiring (722) and diffusion wiring (724). During self-diagnosis, a prescribed voltage is applied to a thin film piezoelectric element (701). If the output difference of the bridge circuit between before and after the voltage application falls outside a prescribed range, it is determined that a breakage occurs in the semiconductor pressure sensor (720).
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: February 14, 2017
    Assignee: Rohm Co., Ltd.
    Inventors: Nobuyuki Yamada, Masahiro Sakuragi, Takeshi Yoshida, Kei Hayashi
  • Patent number: 9534976
    Abstract: A pressure sensor includes a sensor housing mounted on a vehicle, a first detector located in the housing and having a first diaphragm facing a sealed space of the vehicle, a second detector located in the housing and having a second diaphragm facing the sealed space, and a protector located in the housing and covering the first and second detectors. A first chamber is formed between the first diaphragm and the housing and isolated from the sealed space so that the first diaphragm can be deformed by a pressure in the sealed space. A second chamber is formed between the second diaphragm and the sensor housing and communicates with the sealed space. The first and second diaphragms produce the same signal when being deformed by the same amount in the same direction.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: January 3, 2017
    Inventors: Masatada Yoshida, Makoto Sakai
  • Patent number: 9486579
    Abstract: A pressure sensor for use with a fluid delivery system having good sensitivity at low pressure, but also configured to remain in operating condition after being exposed to high pressures is disclosed herein. In one variation, the pressure sensor includes a fluid path set, a deformable element associated with the fluid path set and configured to deform in response to an external pressure, and a pressure transducer for monitoring deformation of the deformable element. In certain embodiments, the pressure sensor is configured to measure fluid pressure within the range of between about 0 mm Hg to about 300 mm Hg. However, the sensor pressure is also be configured to remain functional after being exposed to pressure in excess of about 60,000 mm Hg.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: November 8, 2016
    Assignee: Bayer HealthCare LLC
    Inventors: Michael A Riley, Michael A Spohn, Gerald W Callan, Michael J Swantner, Russell M Evans, III
  • Patent number: 9448055
    Abstract: Aspects of the present disclosure relate to a method that includes receiving, at first and second input terminals, first and second input voltages and maintaining the direction of the first and second input voltages and doubling the first and second input voltages. The method also includes measuring, by a Wheatstone bridge, an applied physical parameter; outputting, to a capacitor, and to first and second operational amplifiers, first and second signals substantially indicative of the physical parameter; reducing, by the capacitor, a DC component of the first and second signals; amplifying, by the first and second operational amplifiers, the first and second signals; and adjusting, by a gain resistor, a differential output between first and second output voltages that correspond to the first and second signals output from the Wheatstone bridge. Finally, the method includes outputting, by first and second output terminals, the first and second output voltages.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: September 20, 2016
    Assignee: Kulite Semiconductor Products, Inc.
    Inventor: Wolf Landmann
  • Patent number: 9341499
    Abstract: Disclosed is a method for adjusting a sensor signal and a corresponding sensor system comprising a sensor for providing a sensor signal representative of a measure other than temperature, dynamic components of the sensor signal being dependent on temperature. In addition there is provided a temperature sensor for measuring the temperature. Dynamic components in the sensor signal are adjusted subject to the temperature sensed, and a compensated sensor signal is supplied. Such sensor system helps compensating for long response times of sensors.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: May 17, 2016
    Assignee: Sensirion AG
    Inventors: Markus Graf, Vincent Hess, Dominik Niederberger
  • Patent number: 9316557
    Abstract: A method for monitoring the operation of a pressure measuring cell (10) of a capacitive pressure sensor (1), wherein the pressure measuring cell (10) has a measuring capacitor (CM) and a reference capacitor (CR) and the pressure measuring value (p) is obtained from the capacity values of the measuring capacitor (CM) and the reference capacitor (CR), characterized in that a control pressure measuring value (p?) is obtained with an auxiliary capacitor (CZ) arranged outside the pressure measuring cell (10) and the operability of the pressure measuring cell (10) is inferred by comparing the pressure measuring value (p) to the control pressure measuring value (p?) is provided.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: April 19, 2016
    Inventor: Heinz Walter
  • Patent number: 9283319
    Abstract: Cannula assemblies with pressure sensors made of stacked coplanar layers and ambulatory infusion systems comprising the same are disclosed. The cannula assemblies include a hub and an infusion cannula. The hub includes a pressure sensor and a fluid channel fluidly coupled to the infusion cannula. The pressure sensor is formed from a stack of coplanar layers including a top layer, a base layer an electrode layer and a counter electrode layer. The fluid channel is positioned between the top layer and the base layer. The electrode layer is positioned between the top layer and the base layer and coupled to the fluid channel. The counter-electrode layer is positioned between the top layer and the electrode layer. A spacer layer having a through cut-out defining an electrode cavity is disposed between the top layer and the base layer such that the electrode layer extends across the electrode cavity.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: March 15, 2016
    Inventors: Andreas Geipel, Florian Kuhni, Christoph Huwiler, Ulrich Haueter
  • Patent number: 9267859
    Abstract: The invention relates to a measuring apparatus for measuring a measurement variable of a fluid, particularly a sensor, such as a pressure sensor or a displacement sensor. The measuring apparatus comprises a housing, a diaphragm arranged in and/or on the housing, and a resilient element formed in the manner of a leaf spring for restoring the diaphragm. A signal transmitter is operatively connected to the diaphragm and/or the resilient element, and a signal receiver cooperates with the signal transmitter. The resilient element is fastened on the housing at the edge of the resilient element, more specifically in particular only at parts of the edge.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: February 23, 2016
    Assignee: Marquardt Mechatronik GmbH
    Inventors: Dietmar Weisser, Markus Scheiter
  • Patent number: 9236626
    Abstract: The present application is directed to a gas-generating apparatus (10). Hydrogen is generated within the gas-generating apparatus and is transported to a fuel cell. The generation of hydrogen is regulated automatically by the selective exposure of a catalyst (48) to the fuel mixture depending on the pressure inside the reaction chamber (28) of the gas-generating apparatus. Catalyst sealing mechanisms (40, 42) are provided at least partially within the reaction chamber to regulate the hydrogen pressure and to minimize the fluctuations in pressure of the hydrogen received by the fuel cell.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: January 12, 2016
    Assignee: Intelligent Energy Limited
    Inventors: Alain Rosenzweig, Andrew J. Curello, Paul Spahr, Michael R. Curello
  • Patent number: 9229040
    Abstract: In an existing disconnection detection circuit for a bridge circuit, consideration is not taken into the fact that an offset voltage or temperature characteristic of a bridge output is degraded. Provided is a disconnection detection circuit for a bridge circuit capable of suppressing a change in a characteristic of a sensor to a minimal extent. A disconnection detection circuit 8a for a bridge circuit in accordance with the present invention comprises conducting means 9 and 10 each of which causes a current to flow from an output terminal of the bridge circuit to a predetermined potential, potential difference detecting means 12 and 13 each of which detects a potential difference between the potential at the output terminal of the bridge circuit and the predetermined potential, and a disconnection detecting means 14 that detects a disconnection on the basis of the outputs of the potential difference detecting means.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: January 5, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Masahiro Matsumoto, Hiroshi Nakano, Keiji Hanzawa, Masamichi Yamada
  • Patent number: 9116064
    Abstract: A built-in self-test structure for a pressure tester and a method thereof are provided. The built-in self-test structure includes a substrate, a plurality of membrane layers, a fixing portion, an electrical heating unit and a sensing circuit unit. The membrane layers are formed on the substrate. The fixing portion is configured on the membrane layers and includes a notch. The notch and the membrane layers define a cavity. The electrical heating unit is configured on one membrane layer, and the sensing circuit unit is configured on another membrane layer. The electrical heating unit heats up to increase the pressure in the cavity according to an input voltage, so that the membrane layers have a small deformation. The sensing circuit unit outputs a test signal according to the small deformation.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: August 25, 2015
    Assignee: King Yuan Electronics Co., Ltd.
    Inventor: Wei-Jen Cheng
  • Patent number: 9101958
    Abstract: Provided is an electromechanical transducer which is capable of correcting or compensating a fluctuation in the transmission/reception characteristics of an elastic wave transmitting/receiving unit due to applied pressure. The electromechanical transducer (102) which transmits/receives elastic waves such as ultrasound includes the elastic wave transmitting/receiving unit (201) for transmitting/receiving elastic waves, a pressure detecting unit (203) for detecting pressure that is applied to the elastic wave transmitting/receiving unit, and a correcting unit (204). Based on pressure information which is detected by the pressure detecting unit, the correcting unit performs at least one of a correction of elastic wave transmitted/received signals relevant to the elastic wave transmitting/receiving unit and a correction of the transmission/reception characteristics of the elastic wave transmitting/receiving unit.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: August 11, 2015
    Inventors: Atsushi Kandori, Masao Majima
  • Patent number: 9050001
    Abstract: A monitoring system including a reading device electrically connected to a probe via a wired interface. The probe has a physiological sensor/transducer configured as a Wheatstone resistive bridge balancing circuit. Integrated within the housing of the probe to prohibit separation during use by a user is a memory device arranged in parallel with the sensor. Communication between the reading device and the probe occurs via a wired interface utilizing a same number of electrical wires between the reading device and the Wheatstone as would be required without the memory device. Control circuitry selects between one of two modes for accessing either data detected by the sensor or the memory device.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: June 9, 2015
    Inventors: Salim Kassem, Didier Balli, Nicholas D. Baruch
  • Patent number: 9039278
    Abstract: A ratio meter includes a converter circuit, a first counter, a delay circuit, and a second counter. The converter circuit is configured to receive a temperature-independent signal, to convert the received temperature-independent signal into a first frequency signal during a first phase, to receive a temperature-dependent signal, and to convert the temperature-dependent signal into a second frequency signal during a second phase. The first counter is configured to receive the first frequency signal and to generate a control signal by counting a predetermined number of pulses of the first frequency signal count. The delay circuit is configured to delay the control signal for a predetermined time delay. The second counter is configured to receive the second frequency signal and to generate a count value by counting the second frequency signal.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: May 26, 2015
    Inventors: Mei-Chen Chuang, Jui-Cheng Huang, Alan Roth
  • Publication number: 20150114128
    Abstract: 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.
    Type: Application
    Filed: October 30, 2014
    Publication date: April 30, 2015
    Inventors: Haig Norian, Louis DeRosa, Joseph VanDeWeert
  • Publication number: 20150012235
    Abstract: 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.
    Type: Application
    Filed: September 25, 2014
    Publication date: January 8, 2015
    Inventors: David J. Ferran, Robert J. Ferran
  • Publication number: 20150000416
    Abstract: A fluidic chip device configured for processing a fluid, wherein the fluidic chip device comprises a plurality of layers laminated to one another, wherein at least a part of the layers comprises a patterned section of an alternating sequence of bars and fluidic channels for conducting the fluid under pressure, the patterned section being configured for being displaceable in response to the pressure, and a pressure detector responding to the displacement of the patterned section by generating a detector signal being indicative of a value of the pressure.
    Type: Application
    Filed: September 15, 2011
    Publication date: January 1, 2015
    Applicant: Agilent Technologies, Inc.
    Inventors: Martin Baeuerle, Konstantin Choikhet
  • Patent number: 8893554
    Abstract: 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.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: November 25, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Craig T. Stambaugh
  • Patent number: 8878313
    Abstract: A pressure sensor has a sensor body at least partly formed with an electrically insulating material, particularly a ceramic material, defining a cavity facing on which is a diaphragm provided with an electric detector element, configured for detecting a bending of the diaphragm. The sensor body supports a circuit arrangement, including, a plurality of circuit components, among which is an integrated circuit, for treating a signal generated by the detection element. The circuit arrangement includes tracks made of electrically conductive material directly deposited on a surface of the sensor body made of electrically insulating material. The integrated circuit is made up of a die made of semiconductor material directly bonded onto the surface of the sensor body and the die is connected to respective tracks by means of wire bonding, i.e. by means of thin connecting wires made of electrically conductive material.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: November 4, 2014
    Assignee: Metallux SA
    Inventor: Luca Salmaso
  • Publication number: 20140260644
    Abstract: 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.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Sensonetics, Inc.
    Inventor: Mark Russell Sahagen
  • Patent number: 8833172
    Abstract: A pressure sensing element may include a diaphragm and a stepped cavity. The pressure sensing element may include a plurality of piezoresistors, which are operable to generate an electrical signal based on an amount of deflection of the diaphragm in response to a sensed pressure of the fluid. The pressure sensing element may be mounted onto a housing substrate using an adhesive so that a portion of the adhesive is attached to walls of a first cavity and to a step surface of the stepped cavity to redistribute thermally induced stresses on the pressure sensing element. The stepped cavity may be included in a MEMS pressure sensing element to reduce or eliminate thermal noise, such as temperature coefficient of offset voltage output (TCO).
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: September 16, 2014
    Assignee: Continental Automotive Systems, Inc
    Inventor: Jen-Huang Albert Chiou
  • Patent number: 8838404
    Abstract: A pressure detector detecting a pressure of cold or hot water; a temperature detector detecting a temperature of a pressure sensor; correcting equation storage storing, cold water correcting equation information applied when the temperature detected by the temperature detector is included in a cold water temperature range, and hot water correcting equation information applied when the temperature detected by the temperature detector is included in a hot water temperature range; a temperature range determiner determining the temperature range that includes the temperature detected by the temperature detector as either a cold water temperature range or a hot water temperature range; and a correction calculating portion using the correcting equation corresponding to the temperature range determined by the temperature range determiner correcting the detection signal by the pressure detector, and outputting the post-correction signal as a measurement signal.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: September 16, 2014
    Assignee: Azbil Corporation
    Inventor: Tomohisa Sasaki
  • Patent number: 8820169
    Abstract: Pressure sensors having components with reduced variations due to stresses caused by various layers and components that are included in the manufacturing process. In one example, a first stress in a first direction causes a variation in a component. A second stress in a second direction is applied, thereby reducing the variation in the component. The first and second stresses may be caused by a polysilicon layer, while the component may be a resistor in a Wheatstone bridge.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: September 2, 2014
    Assignee: Silicon Microstructures, Inc.
    Inventors: Richard J. August, Michael B. Doelle
  • Publication number: 20140222363
    Abstract: 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.
    Type: Application
    Filed: January 14, 2014
    Publication date: August 7, 2014
    Inventors: David J. Ferran, Robert J. Ferran
  • Patent number: 8794074
    Abstract: 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.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: August 5, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Eric Ochs, Frieder Haag, Eckart Schellkes
  • Patent number: 8763467
    Abstract: 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 90 includes electrode lead pins connecting between the sensor within the package and the circuit portion within the circuit containing portion, insulated pipes for covering the outer peripheries of the electrode lead pins, and coil springs covering the outer peripheries of the insulated pipes.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: July 1, 2014
    Assignee: Azbil Corporation
    Inventors: Takuya Ishihara, Hidefumi Harada, Masashi Sekine
  • Patent number: 8746073
    Abstract: A method for the compensating temperature gradient influences on a pressure measuring transducer, comprising the steps of: registering a pressure signal Sp(t); registering a temperature signal T(t); ascertaining a pressure measured value ps(Sp(t), T(t)); determining the time derivative of the temperature signal dT/dt; correcting the pressure measured value with a correction function, which depends on the time derivative, wherein, as a function of the sign of the time derivative, another correction function is selected, or other coefficients in a function of equal type are selected.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: June 10, 2014
    Assignee: Endress + GmbH + Co. KG
    Inventors: Igor Getman, Manuel Bondi-Liedtke, Thomas Uehlin, Elmar Wosnitza