Including A Comparison Or Difference Circuit Patents (Class 324/656)
  • Patent number: 10587153
    Abstract: The present invention discloses an intruding metal detection method for a supplying-end module of an induction type power supply system having a supplying-end coil controlled by a first driving signal and a second driving signal. The method includes periodically generating a detection signal on the first driving signal and the second driving signal, wherein the detection signal controls the supplying-end coil to resonate and generate a coil signal; setting at least one threshold voltage and comparing a plurality of peak values of the coil signal with the at least one threshold voltage, respectively, to generate a plurality of trigger signals; determining whether to perform a pre-charging procedure according to a resonant frequency of the coil signal; and determining whether there is an intruding metal existing in a power supply range of the induction type power supply system according to the plurality of trigger signals and the resonant frequency.
    Type: Grant
    Filed: September 2, 2018
    Date of Patent: March 10, 2020
    Assignee: Fu Da Tong Technology Co., Ltd.
    Inventors: Ming-Chiu Tsai, Chi-Che Chan
  • Patent number: 9649583
    Abstract: A filter assembly has a qualified filter element that filters fuel, a filter housing for the qualified filter element and a water-in-fuel sensor that senses presence of water in the filter housing. An electrical resistance of the water-in-fuel sensor changes based upon whether the qualified filter element is installed in the housing. A filter assembly can also have a plurality of magnetic elements disposed on at least one of the filter housing and the qualified filter element. A plurality of wires are disposed on at least the other of the filter housing and the qualified filter element. The control circuit determines that the qualified filter element is installed in the filter housing based on a change in the electrical current in the plurality of wires.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: May 16, 2017
    Assignee: CUMMINS FILTRATION IP, INC.
    Inventors: Jared M. Gwin, Sainath Reddy Racha, Gregory D. Shope, Yiming Z. Jiang
  • Patent number: 9030209
    Abstract: A failure detecting apparatus that detects an isolation failure between a plurality of coils included in a signal detection apparatus. The failure detecting apparatus includes a voltage applying unit that applies a DC voltage to a coil in the plurality of coils; a differential signal generating unit that generates a differential signal from a voltage at the coil and a predetermined voltage; a threshold voltage setting circuit that outputs a threshold voltage; and a comparator that compares the differential signal with the threshold voltage, thereby detecting whether or not an isolation failure exists. The differential signal generating unit includes either first setting unit for setting an absolute value of the differential signal to be amplified with a predetermined gain or second setting unit for setting the predetermined voltage to be different from a ground potential, and the predetermined gain is set to a value different from one and zero.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: May 12, 2015
    Assignee: Denso Corporation
    Inventor: Yosuke Asako
  • Publication number: 20150109002
    Abstract: A method for recognizing a manipulation of at least one electrical line includes determining a parameter that is dependent on a resistance and a capacity, a resistance and an inductivity, or a resistance, a capacity, and an inductivity of the electrical line; comparing the determined parameter to a reference parameter to provide a comparison result; and recognizing a manipulation of the electrical line based on the provided comparison result.
    Type: Application
    Filed: March 14, 2013
    Publication date: April 23, 2015
    Inventors: Markus Dichtl, Bernd Meyer
  • Publication number: 20150109001
    Abstract: A hardware-only contactless position sensor system is provided that includes a contactless position sensor and hardware-only sensor system electronics. The sensor includes excitation, sine, and cosine coils. The electronics are coupled to the sensor and detect a position of a target relative to the sensor. The electronics include a phase shift and summation circuit that applies a phase shift at a frequency of the excitation coil to one of a sine signal from the sine coil or a cosine signal from the cosine coil as a phase shifted signal and add the phase shifted signal with an unshifted instance of the cosine or sine signal to produce a phase shifted output. The electronics also include a phase detector circuit that detects a phase of the phase shifted output and generate an output voltage corresponding to the phase and proportional to the position of the target.
    Type: Application
    Filed: February 11, 2014
    Publication date: April 23, 2015
    Applicant: Rosemount Aerospace, Inc.
    Inventors: Donald R. Singh, James Joseph McTighe
  • Patent number: 9007071
    Abstract: Present techniques provide an inductive proximity sensor having a multi-receiver coil assembly and an evaluator circuit configured to receive a differential signal from the multi-receiver coil assembly to determine the presence of a target. The multi-receiver coil assembly includes two receiver coils in a differential coil arrangement and a transmitter coil configured to emit an electromagnetic field and induce a voltage on each of the receiver coils. The voltage difference between the two receiver coils is transmitted as a differential signal to the evaluator circuit. Targets which approach the inductive proximity sensor disrupt the electromagnetic field and change the induced voltages on each of the receiver coils, thereby changing the differential signal. The evaluator circuit processes the differential signal to determine whether the changes indicate that a target is present.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: April 14, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Xiaofeng Sean Gong, Qiang Jacky Jin, Frank J. Liao
  • Patent number: 8970541
    Abstract: A sensing device is provided. First to third receiving electrodes extend in a first direction. First and third receiving electrodes are respectively disposed on two sides of the second receiving electrode. The first to fourth transmitting electrodes are disposed on a row extending in a second direction. The first and second transmitting electrodes are respectively disposed on two sides of the first receiving electrode, the third and fourth transmitting electrodes are respectively disposed on two sides of the third receiving electrode, and the second and third transmitting electrode are respectively disposed on two sides of the second receiving electrode. The first, second third and fourth transmitting electrodes are independently controlled by a transmitter. A receiver generates a sensing signal according to a signal level is at least one of the first, second, and third receiving electrodes.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: March 3, 2015
    Assignee: Innolux Corporation
    Inventor: Martin John Edwards
  • Patent number: 8933709
    Abstract: A method for determining residual coupling of an inductive, conductivity sensor, in which the conductivity sensor is surrounded by a measured medium and an equivalent impedance of the medium is calibrated with a variable compensation impedance. The variable compensation impedance and the equivalent impedance of the medium act on a measuring coil of the conductivity sensor with a phase shift of 180°. In order to be able to perform a measuring of the residual coupling with a high accuracy of measurement at any time during operation of the conductivity sensor, the variable compensation impedance is varied until an output voltage of the measuring coil of the conductivity sensor assumes a minimum voltage; wherein the minimum voltage corresponds to the residual coupling of the inductive, conductivity sensor.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: January 13, 2015
    Assignee: Endress+Hauser Conducta Gesellschaft fur Mess- und Regeltechnik mbH+Co. KG
    Inventor: Marco Völker
  • Patent number: 8869591
    Abstract: A method for sensing analyte. The method includes the steps of sensing one or more parameters in reaction to the presence of one or more analytes and outputting a current therefrom in accordance with level of the sensed parameter by each of a plurality of sensors, each of the plurality of sensors being provided in one or more sensor array columns, selectively heating one or more of the sensor array columns by a heating element, and receiving an output current from one of the plurality of sensors from each of the plurality of sensor arrays by a Voltage Controlled Oscillator (VCO) arranged in a VCO array. The method further includes the steps of generating an output oscillation frequency by each VCO in accordance with the level of the received output current, and counting a number of oscillations over a predetermined time received from each of the plurality of VCOs in the VCO array by a plurality of counters arranged in a counter array.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: October 28, 2014
    Assignee: Sensorbit Systems, Inc.
    Inventors: Klaus Dimmler, Thomas Moss, III
  • Publication number: 20140306551
    Abstract: An embodiment relates to an integrated circuit comprising measurement means for detection of a current change, wherein said measurement means comprise at least one coil.
    Type: Application
    Filed: April 14, 2013
    Publication date: October 16, 2014
    Inventors: Franz JOST, Jens BARRENSCHEEN, Philip Georg BROCKERHOFF
  • Publication number: 20140228765
    Abstract: A refillable and implantable infusion apparatus and method that includes a needle penetration detector that detects and indications the position of a needle relative to a septum of a drug reservoir of the implantable infusion apparatus. With the needle position data, medical professionals may better ensure they are injecting drugs into the drug reservoir, thus, improving patient safety.
    Type: Application
    Filed: February 4, 2014
    Publication date: August 14, 2014
    Applicant: Flowonix Medical Incorporated
    Inventors: Paul BURKE, Steve ADLER, Robert M. HANSEN
  • Publication number: 20140167788
    Abstract: An inductive sensor includes a primary winding, two secondary windings and a moveable target, the primary winding being centered about a central axis and carrying a high-frequency alternating current which can induce a voltage in secondary windings, the secondary windings also being centered about the central axis and made up of a number k of substantially identical loops, which are successively crossed and arranged opposite the primary winding. In this case, the target is made up of a part having p=1 angular sector with an angular opening. The opening of the angular sector of the target is less than that of a loop of secondary winding with a deviation calculated such as to eliminate the fourth harmonic of the linearity deviation Fourier decomposition, between the measured angular value and real angular value for the position of the target over the measurement course.
    Type: Application
    Filed: December 4, 2013
    Publication date: June 19, 2014
    Applicants: CONTINENTAL AUTOMOTIVE GmbH, CONTINENTAL AUTOMOTIVE FRANCE
    Inventor: Alain FONTANET
  • Publication number: 20140111019
    Abstract: The disclosure features apparatus, methods, and systems for wireless power transfer that include a power source featuring at least one resonator, a power receiver featuring at least one resonator, a first detector featuring one or more loops of conductive material and configured to generate an electrical signal based on a magnetic field between the power source and the power receiver, a second detector featuring conductive material, and control electronics coupled to the first and second detectors, where during operation, the control electronics are configured to measure the electrical signal of the first detector and compare the measured electrical signal of the first detector to baseline electrical information for the first detector to determine information about whether debris is positioned between the power source and the power receiver.
    Type: Application
    Filed: October 21, 2013
    Publication date: April 24, 2014
    Inventors: Arunanshu Mohan Roy, Noam Katz, Andre B. Kurs, Christopher Buenrostro, Simon Verghese, Morris P. Kesler, Katherine L. Hall, Herbert Toby Lou
  • Patent number: 8633711
    Abstract: This invention provides methods and devices for detecting the viscosity and conductivity of a conductive fluid sample. A sample fluid can be received into a sample chamber between a field inductor and sensor inductor. Electromagnetic fields generated by the field inductor can be modulated due to the counter-emf induced in the sample. The modulations can be detected by the sensor inductor and correlated to electric parameters in the fluid.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: January 21, 2014
    Assignee: MicroPoint Bioscience, Inc.
    Inventors: Michael Huang, Mengya Wu, Mengyou Wu
  • Patent number: 8604807
    Abstract: Operative monitoring of track brakes involves passing an electric current through a winding of a brake magnet, measuring the electric current and comparing the temporal progression of the measured current with a saved temporal progression of a reference current. Comparison is achieved by calculating the difference between the measured current and the reference current. The difference between measured current and reference current may be temporally integrated and compared with a threshold value. To determine a magnetic coupling between track brake and track, a calculation may be made as to whether the measured current has local minima and/or local maxima during the activation of the track brake, only the temporal progression of the measured current as the current increases being subjected to a comparison with the reference current. The current may be activated in pulses, with the comparison of the measured current and the reference current being restarted with each pulse.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: December 10, 2013
    Assignee: Knorr-Bremse Systeme fur Schienenfahrzeuge GmbH
    Inventors: Henry Lehmann, Josef Datzreiter, Franz Daxecker, Peter Schlager
  • Patent number: 8587326
    Abstract: A method for operating a magneto-inductive flow measuring device having a measuring tube, wherein an at least partially electrically-conductive measured material flows through the measuring tube. For determining flow, there is produced by means of at least one coil arrangement a clocked magnetic field, which at least partially passes through the measured material, wherein the magnetic field is produced by an exciter current, which flows through the coil arrangement. The magnetic field is operated with at least a first clocking, wherein, in a case in which the coil arrangement is free of exciter current, an electrical potential difference is sensed between the measured material and a reference potential by means of at least a first measuring electrode communicating with the measured material.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: November 19, 2013
    Assignee: Endress + Hauser Flowtec AG
    Inventor: Markus Rufenacht
  • Patent number: 8587327
    Abstract: A device for use with a conduit having a first conduit end and a conduit second end, into which conduit a cable can be installed using a flow of air into the first conduit end, the device being suitable for confirming that the air is flowing out from the second conduit end. In an embodiment, the device includes a housing, means to enable connection of the device to the second conduit end, a detector arranged to detect an electrical property change, and an actuator for causing an electrical property change detectable by the detector, wherein in use, the air flowing into the device causes the detector and the actuator to move relative to each other, causing an electrical property change detectable by the detector.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: November 19, 2013
    Assignee: British Telecommunications Public Limited Company
    Inventors: David John Taylor Heatley, Philip Alfred Barker, Ian Neild
  • Patent number: 8575942
    Abstract: This invention relates to non-contact measurement methods and an apparatus for the identification of hazardous contact voltages on energized objects and surfaces. The apparatus includes an electric field sensor structured to sense an electric field and a gain amplifier electrically connected to the electric field sensor to amplify electric signals from the electric field sensor. The apparatus further includes a signal conditioning circuit adapted to process the amplified electric signals and form time-coordinated signals and a digital signal processor adapted to evaluate the time-coordinated signals and provide a user with a status of a contact voltage source by activating an appropriate status indicator.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: November 5, 2013
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Douglas Stewart Dorr, Kermit O. Phipps, Thomas A. Cooke, Philip C. Cochrane
  • Publication number: 20130285678
    Abstract: A filter assembly has a qualified filter element that filters fuel, o filter housing for the qualified filter element and a water-in-fuel sensor that senses presence of water in the filter housing. An electrical resistance of the water-in-fuel sensor changes based upon whether the qualified filter element is installed in the housing. A filter assembly can also have a plurality of magnetic elements disposed on at least one of the filter housing and the qualified filter element. A plurality of wires are disposed on at least the other of the filter housing and the qualified filter element. The control circuit determines that the qualified filter element is installed in the filter housing based on a change in the electrical current in the plurality of wires.
    Type: Application
    Filed: April 17, 2013
    Publication date: October 31, 2013
    Applicant: Cummins Filtration IP, Inc.
    Inventors: Jared M. Gwin, Sainath Reddy Racha, Gregory D. Shope, Yiming Z. Jiang
  • Patent number: 8508243
    Abstract: The inductive incremental displacement sensor is characterized in that the first sensor unit and the second sensor unit each have a first inductive sensor and a second inductive sensor disposed at a distance from each other and that the first sensor unit and the second sensor unit deliver a switching signal relevant to a conductive region of the graduated track when the difference or the ratio of the detection signals from the inductive sensors allocated to the respective sensor unit as generated by the conductive region is less than a specifiable threshold. Furthermore, the invention relates to a method for determining the displacement of a first object relative to a second object as well as to an inductive sensor unit.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: August 13, 2013
    Assignee: Pepperl + Fuchs GmbH
    Inventors: Christian Speckmann, Ulrich Ehrenfried
  • Patent number: 8441267
    Abstract: A method for operating an inductive conductivity-measuring cell having a primary circuit with a sending coil, a secondary circuit with a receiver coil, and a short-circuit path, which passes through the sending coil and the receiver coil. The sending coil couples via the short-circuit path inductively with the receiver coil, wherein, in the case of closed short-circuit path, a first electrical signal present in the primary circuit is measured, and wherein the first signal is compared with, and/or weighed against, values, which are furnished or stored.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: May 14, 2013
    Assignee: Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG
    Inventors: Andreas Eberheim, Thomas Nagel, Marco Volker, Hendrik Zeun, Andre Thieme
  • Patent number: 8378660
    Abstract: An integrated circuit device inductive touch analog front end excites selected ones of a plurality of inductive touch sensors and provides analog output signals representative of voltages across the coils of the plurality of inductive touch sensors. Various characteristics of the inductive touch analog front end are programmable. A digital processor controls selection of each one of the plurality of inductive touch sensors and receives the respective analog output voltage signal from the inductive touch AFE. The digital processor may program the characteristics of the inductive touch analog front end. When a sufficient change in the coil voltage is determined by the digital processor, that inductive touch sensor is assumed to have been actuated and the digital processor takes action based upon which one of the plurality of inductive touch sensors was actuated (touched).
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: February 19, 2013
    Assignee: Microchip Technology Incorporated
    Inventors: Sean Steedman, Keith E. Curtis, Radu Ruscu, Petru Cristian Pop
  • Patent number: 8294476
    Abstract: A method for measuring values from a sensor cell having the basic structure of an MOS silicone transistor having and including a polymer material therein. The method includes the steps of expelling an analyte from the polymer material, determining a silicon current signature before analyte accumulation in a sensitive response region, introducing analyte into the polymer material, determining the silicon current signature immediately after analyte introduction, determining the organic current signature immediately after analyte introduction, allowing analyte accumulation in the polymer material, determining the silicon current signature after analyte accumulation, determining the organic current signature after analyte accumulation, and determining the silicon current signature after analyte accumulation in sensitive response region.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: October 23, 2012
    Assignee: Sensorbit Systems, Inc.
    Inventors: Klaus Dimmler, Thomas Moss, III
  • Publication number: 20120242352
    Abstract: Present techniques provide an inductive proximity sensor having a multi-receiver coil assembly and an evaluator circuit configured to receive a differential signal from the multi-receiver coil assembly to determine the presence of a target. The multi-receiver coil assembly includes two receiver coils in a differential coil arrangement and a transmitter coil configured to emit an electromagnetic field and induce a voltage on each of the receiver coils. The voltage difference between the two receiver coils is transmitted as a differential signal to the evaluator circuit. Targets which approach the inductive proximity sensor disrupt the electromagnetic field and change the induced voltages on each of the receiver coils, thereby changing the differential signal. The evaluator circuit processes the differential signal to determine whether the changes indicate that a target is present.
    Type: Application
    Filed: February 21, 2012
    Publication date: September 27, 2012
    Applicant: Rockwell Automation Asia Pacific Business Center Pte. Ltd.
    Inventors: Xiaofeng Sean Gong, Qiang Jacky Jin, Frank J. Liao
  • Publication number: 20120086633
    Abstract: The invention relates to a method for measuring a distance between a coordinate indicator and a coordinate input device, which belongs to the technical field of computer peripheral equipments. The method comprises the steps of measuring an actual amplitude of an output signal of a receiving coil in the electromagnetic induction plate by a measurement circuit in the electromagnetic induction plate; determining a distance between the coordinate indicator and the coordinate input device in accordance with the actual amplitude of the output signal, a nominal amplitude of the output signal, and a preset reference amplitude of signal.
    Type: Application
    Filed: September 16, 2009
    Publication date: April 12, 2012
    Applicant: HANWANG TECHNOLOGY CO., LTD.
    Inventors: Yingjian Liu, Songlin Wu, Guowei Xiang, Yu Tian
  • Publication number: 20120071091
    Abstract: An efficiency monitor for monitoring the efficiency of power transmission by an inductive power outlet. The efficiency monitor includes an input power monitor, for measuring the input power delivered to the primary coil, and an output power monitor, for measuring the output power received by the secondary coil. The input and output powers are used by a processor to determine an index of power-loss. A circuit breaker may be used to disconnect the inductive power outlet in case of excessive power loss.
    Type: Application
    Filed: November 29, 2011
    Publication date: March 22, 2012
    Applicant: POWERMAT LTD
    Inventors: Yossi Azancot, Amir Ben-Shalom, Oola Greenwald, Arik Rofe
  • Publication number: 20110267077
    Abstract: A method for measuring values from a sensor cell having the basic structure of an MOS silicone transistor having and including a polymer material therein. The method includes the steps of expelling an analyte from the polymer material, determining a silicon current signature before analyte accumulation in a sensitive response region, introducing analyte into the polymer material, determining the silicon current signature immediately after analyte introduction, determining the organic current signature immediately after analyte introduction, allowing analyte accumulation in the polymer material, determining the silicon current signature after analyte accumulation, determining the organic current signature after analyte accumulation, and determining the silicon current signature after analyte accumulation in sensitive response region.
    Type: Application
    Filed: June 15, 2010
    Publication date: November 3, 2011
    Applicant: SENSORBIT SYSTEMS, INC.
    Inventors: Klaus Dimmler, Thomas Moss, III
  • Publication number: 20110251809
    Abstract: An inductive loop presence detector for sensing objects, such as rail cars, containing one or more sensing loops. The inductive loop presence detector includes a backup power supply that is connected to a control unit of the detector to power the control unit during an interruption in the line voltage. The backup power supply includes batteries or capacitors that power the control unit when the line voltage is interrupted. The control unit of the inductive loop presence detector operates in a lower power mode when the control unit is supplied with power from the backup power supply. The control unit operates to auto-tune and supply power to the sensing loops to operate at the most desirable frequency based upon the inductance of the sensing loops.
    Type: Application
    Filed: October 12, 2010
    Publication date: October 13, 2011
    Applicant: AAA SALES & ENGINEERING, INC.
    Inventor: Wayne E. Stollenwerk
  • Publication number: 20110181303
    Abstract: Systems and methods for detecting electromagnetic waves are disclosed. A system for use in detecting an electromagnetic wave includes an inductive device and a spintronic device. The inductive device generates an induced electromagnetic field when the inductive device receives the electromagnetic wave. The spintronic device has an impedance that changes when exposed to the induced electromagnetic field from the inductive device. The change in impedance is indicative of the electromagnetic wave received by the inductive device. Another system for use in detecting or transmitting an electromagnetic wave includes a conductive device and an inductive device. The inductive device is configured to generate an induced electromagnetic wave when the inductive device receives an electromagnetic wave passed by the conductive device. Another system for detecting electromagnetic wave permittivity or permeability of an object includes a pair of antennas and an inductive device.
    Type: Application
    Filed: February 18, 2011
    Publication date: July 28, 2011
    Applicant: UNIVERSITY OF DELAWARE
    Inventors: JOHN Q. XIAO, Xin Fan
  • Publication number: 20110156723
    Abstract: This invention relates to non-contact measurement methods and an apparatus for the identification of hazardous contact voltages on energized objects and surfaces. The apparatus includes an electric field sensor structured to sense an electric field and a gain amplifier electrically connected to the electric field sensor to amplify electric signals from the electric field sensor. The apparatus further includes a signal conditioning circuit adapted to process the amplified electric signals and form time-coordinated signals and a digital signal processor adapted to evaluate the time-coordinated signals and provide a user with a status of a contact voltage source by activating an appropriate status indicator.
    Type: Application
    Filed: October 20, 2010
    Publication date: June 30, 2011
    Applicant: ELECTRIC POWER RESEARCH INSTITUTE, INC.
    Inventors: Douglas Stewart Dorr, Kermit O. Phipps, Thomas A. Cooke, Philip C. Cochrane
  • Publication number: 20110109326
    Abstract: Operative monitoring of track brakes involves passing an electric current through a winding of a brake magnet, measuring the electric current and comparing the temporal progression of the measured current with a saved temporal progression of a reference current. Comparison is achieved by calculating the difference between the measured current and the reference current. The difference between measured current and reference current may be temporally integrated and compared with a threshold value. To determine a magnetic coupling between track brake and track, a calculation may be made as to whether the measured current has local minima and/or local maxima during the activation of the track brake, only the temporal progression of the measured current as the current increases being subjected to a comparison with the reference current. The current may be activated in pulses, with the comparison of the measured current and the reference current being restarted with each pulse.
    Type: Application
    Filed: June 10, 2009
    Publication date: May 12, 2011
    Inventors: Henry Lehmann, Josef Datzreiter, Franz Dexecker, Peter Schlager
  • Publication number: 20110109325
    Abstract: This invention provides methods and devices for detecting the viscosity and conductivity of a conductive fluid sample. A sample fluid can be received into a sample chamber between a field inductor and sensor inductor. Electromagnetic fields generated by the field inductor can be modulated due to the counter-emf induced in the sample. The modulations can be detected by the sensor inductor and correlated to electric parameters in the fluid.
    Type: Application
    Filed: September 9, 2010
    Publication date: May 12, 2011
    Applicant: MicroPoint Bioscience Inc.
    Inventors: Michael Huang, Mengya Wu, Mengyou Wu
  • Publication number: 20110006786
    Abstract: A device for use with a conduit having a first conduit end and a conduit second end, into which conduit a cable can be installed using a flow of air into the first conduit end, the device being suitable for confirming that the air is flowing out from the second conduit end. In an embodiment, the device includes a housing, means to enable connection of the device to the second conduit end, a detector arranged to detect an electrical property change, and an actuator for causing an electrical property change detectable by the detector, wherein in use, the air flowing into the device causes the detector and the actuator to move relative to each other, causing an electrical property change detectable by the detector.
    Type: Application
    Filed: December 23, 2008
    Publication date: January 13, 2011
    Applicant: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
    Inventors: David John Taylor Heatley, Philip Alfred Barker, Ian Neild
  • Publication number: 20100301876
    Abstract: A method of diagnosing an electronic display device (1) having a screen (3) and a graphics memory (2) in which image data (14), of an image displayed or to be displayed on the screen (3), are one of stored or changed. A measured value (15) characterizes a current consumption or the change in current consumption of the screen (3) or display device (1) while a reference value (16) characterizes the current consumption or the change in current consumption of the screen (3) or display device (1) on the basis of the image data (14) or the change in image data (14). The method compares the reference value (16) to the measured value (15) to determine any malfunction or error in the electronic display device (1).
    Type: Application
    Filed: December 4, 2008
    Publication date: December 2, 2010
    Applicant: ZF FRIEDRICHSHAFEN AG
    Inventors: Ralf Hartrampf, Ludger Rake, Andreas Giefer
  • Publication number: 20100188104
    Abstract: The present invention relates to an inductive incremental displacement sensor for determining a displacement of a first object relative to a second object, comprising at least one graduated track mountable on the first object and having periodically alternating conductive regions and insulating regions, and having at least one scanning unit mountable on the second object for scanning the graduated track with a first sensor unit and a second sensor unit, which are laterally spaced from each other by a distance d=n*(p/2)+q, wherein n is an integer or zero, p is the pitch of the graduated track and 0 is <|q|<p/2, and, in particular, q=0.25 p and comprising an evaluation unit for determining the displacement on the basis of switching signals delivered by the first sensor unit and the second sensor unit.
    Type: Application
    Filed: March 3, 2008
    Publication date: July 29, 2010
    Inventors: Christian Speckmann, Ulrich Ehrenfried
  • Patent number: 7721397
    Abstract: A capacitive ultrasonic transducer includes a flexible layer, a first conductive layer on the flexible layer, a support frame on the first conductive layer, the support frame including a flexible material, a membrane over the support frame being spaced apart from the first conductive layer by the support frame, the membrane including the flexible material, a cavity defined by the first conductive layer, the support frame and the membrane, and a second conductive layer on the membrane.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: May 25, 2010
    Assignee: Industrial Technology Research Institute
    Inventors: Ming-Wei Chang, Tse-Min Deng, Te-I Chiu, Mu-Yue Chen, Da-Chen Pang, Ping-Ta Tai
  • Patent number: 7663377
    Abstract: Systems and methods are provided for sensing or measuring capacitive or inductive reactance or changes in reactance in which the sensed reactance is coupled with a known resistance in a sensor circuit and a start signal is provided to the sensor circuit, and a programmable delay line is used to generate a programmable delay signal. The outputs of the programmable delay and the sensor circuits are compared to ascertain which transitions first, and the programmable delay value is adjusted in successive approximation fashion to identify a programmable delay that best represents the delay time of the sensor circuit from which the sensed reactance value can be determined.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: February 16, 2010
    Assignee: Pepperl +Fuchs, Inc.
    Inventors: Igor Kurkovskiy, Daniel Royer, Hermann Wieth, James William Clingersmith
  • Publication number: 20090140752
    Abstract: The present invention relates to the use of a nanoparticle film having metal ions incorporated wherein and to a method of detecting a gaseous or volatile or liquid analyte in a medium.
    Type: Application
    Filed: December 4, 2008
    Publication date: June 4, 2009
    Applicant: Sony Corporation
    Inventors: Yvonne JOSEPH, Nadejda KRASTEVA
  • Patent number: 7511585
    Abstract: The present invention discloses an automatic page detector, to determine which page of a book is open. The automatic page detector uses a sensor plate and an inductor as a sensor. In the invention, there is a sensor plate at each page of the book and the locations of the sensor plates for different pages are different. There is an array of inductors just beneath the sensor plates when the book is closed. The inductors are connected to the feedback loop of a LC oscillator through analog switches. The proximity of a sensor plate to an inductor will change the frequency of the LC oscillator. Scanning the analog switches by a microprocessor and detecting the variation of frequency of the LC oscillator during each scanning time period, the status of each sensor plate will be detected and we can determine which page of a book is opened.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: March 31, 2009
    Assignee: Holylite Microelectronics Corporation
    Inventor: Shyuh Der Lin
  • Publication number: 20090058562
    Abstract: A sensor for sensing a measurand is described, the sensor comprising a coplanar waveguide with a first surface and a second surface opposite to the first surface; a first structure with a first periodically varying dielectric characteristic, the first structure being arranged on the first surface of the coplanar waveguide; and a second structure with a second periodically varying dielectric characteristic, the second structure being arranged on the second surface of the coplanar waveguide, wherein a unit-cell of the structures with periodically varying dielectric characteristics is dimensioned such that the sensor has a frequency dependent transfer behavior with at least one transfer minimum, and wherein the sensor is implemented such that the measurand influences the first periodically varying dielectric characteristic of the first structure or the second periodically varying dielectric characteristic of the second structure or a relation between such first structure and second structure.
    Type: Application
    Filed: August 30, 2007
    Publication date: March 5, 2009
    Inventor: Mojtaba Joodaki
  • Publication number: 20090033340
    Abstract: Systems and methods are provided for sensing or measuring capacitive or inductive reactance or changes in reactance in which the sensed reactance is coupled with a known resistance in a sensor circuit and a start signal is provided to the sensor circuit, and a programmable delay line is used to generate a programmable delay signal. The outputs of the programmable delay and the sensor circuits are compared to ascertain which transitions first, and the programmable delay value is adjusted in successive approximation fashion to identify a programmable delay that best represents the delay time of the sensor circuit from which the sensed reactance value can be determined.
    Type: Application
    Filed: December 3, 2007
    Publication date: February 5, 2009
    Applicant: PEPPERL + FUCHS, INC.
    Inventors: Igor Kurkovskiy, Daniel Royer, Hermann Wieth, James William Clingersmith
  • Patent number: 7279909
    Abstract: Signal coincidence detection circuits and methods implemented in such circuits are disclosed. An example signal coincidence detection circuit includes a first differential transistor pair, a second differential transistor pair coupled with the first differential transistor pair and a third differential transistor pair coupled with the first differential transistor pair in parallel with the second differential transistor pair. The circuit also includes a first input signal terminal coupled with the first, second and third differential transistor pairs, wherein, in operation, the first input signal terminal receives a first input signal that is communicated to the first, second and third differential transistor pairs.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: October 9, 2007
    Assignee: Honeywell International Inc.
    Inventor: Said E. Abdelli
  • Patent number: 7168150
    Abstract: A method of making a resonant frequency tag which resonates at a predetermined frequency. The method involves providing a first conductive pattern having an inductive element and a first land and a second conductive pattern having a second land and a third land which are joined together by a link. The second conductive pattern is overlaid the first conductive pattern such that the second land is positioned over the first land. The third land is in electrical communication with the inductive element of the first conductive pattern. The formed resonant frequency tag is energized to determine if the tag resonates at the predetermined frequency. If the tag resonates properly, the third land is electrically coupled to the inductive element. If it does not, the second conductive pattern is adjusted so that overlapping portions of the first and second lands are changed, altering the capacitance to adjust the resonant tag frequency.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: January 30, 2007
    Assignee: Checkpoint Systems, Inc.
    Inventors: Eric Eckstein, Gary Mazoki, Peter Lendering, Luis Francisco Soler Bonnin, Takeshi Matsumoto, Lawrence Appalucci
  • Patent number: 7076858
    Abstract: A method of making a resonant frequency tag having a predetermined frequency comprises forming a first conductive pattern comprising an inductive element and a first land having a first end connected to an inductive element end, and a second end spaced a predetermined distance from the first end; separately forming a second conductive pattern comprising a second land having a predetermined width and a link element; placing the second conductive pattern proximate the first conductive pattern at a first location wherein the second land overlies a portion of the first land with a dielectric therebetween establishing capacitive element plates having a first capacitance along with the inductive element forming a resonant circuit; measuring the resonant circuit frequency and comparing the measured and predetermined frequencies moving the second land along of the first land length to match the resonant frequency; and securing the second conductive pattern to the first conductive pattern.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: July 18, 2006
    Assignee: Checkpoint Systems, Inc.
    Inventors: Eric Eckstein, Gary Mazoki, Peter Lendering, Luis Francisco Soler Bonnin, Takeshi Matsumoto, Lawrence Appalucci
  • Patent number: 6993812
    Abstract: Inner individual electrodes are formed at intervals on a piezoelectric ceramic layer so as to correspond in a one-to-one relationship with ink channels, and an inner common electrode are formed on another piezoelectric ceramic layer. The required number of piezoelectric ceramic layers with inner individual electrodes and with an inner common electrode are laminated alternately. An outer common electrode is connected to the inner common electrodes, and outer individual electrodes are connected to the respective inner individual electrodes. The capacitance between the outer common electrode and each of the outer individual electrodes is measured. A polarization electric field adjusted based on the measured value is applied between the common electrode and each of the outer individual electrodes to perform polarization.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: February 7, 2006
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Yoshikazu Takahashi
  • Patent number: 6967488
    Abstract: The current mirror configuration includes four branches, a biasing branch, a first comparator branch, a second comparator branch and a measurement branch. The measurement branch is connected to a pad of the IC device and a measurement current is charged on to the pad. The measurement current is mirrored from the current of the biasing branch and the measurement current is mirrored to the second comparator branch. The biasing branch is mirrored to the first comparator branch using a scale that the current of the first comparator branch is smaller than the current of the biasing branch. In case of a short-circuit, the current of the measurement branch is larger than the current of the first comparator branch.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: November 22, 2005
    Assignee: Dialog Semiconductor GmbH
    Inventor: Antonello Arigliano
  • Patent number: 6956383
    Abstract: A method and apparatus are provided for implementing automated electronic package transmission line characteristic impedance verification. A sinusoidal voltage source is coupled to a transmission line test structure for generating a selected frequency. Impedance measuring circuitry is coupled to the transmission line test structure for measuring an input impedance with an open-circuit termination and a short-circuit termination. Characteristic impedance calculation circuitry is coupled to the impedance measuring circuitry receiving the input impedance measured values for the open-circuit termination and the short-circuit termination for calculating characteristic impedance. Logic circuitry is coupled to the characteristic impedance calculation circuitry for comparing the calculated characteristic impedance with threshold values for verifying acceptable electronic package transmission line characteristic impedance.
    Type: Grant
    Filed: November 13, 2003
    Date of Patent: October 18, 2005
    Assignee: International Business Machines Corporation
    Inventors: Gerald Keith Bartley, Paul Eric Dahlen, Philip Raymond Germann, Andrew B. Maki, Mark Owen Maxson
  • Patent number: 6925701
    Abstract: A method of making a resonant frequency tag which resonates at a predetermined frequency. The method involves providing a first conductive pattern having an inductive element and a first land and a second conductive pattern having a second land and a third land which are joined together by a link. The second conductive pattern is overlaid the first conductive pattern such that the second land is positioned over the first land. The third land is in electrical communication with the inductive element of the first conductive pattern. The formed resonant frequency tag is energized to determine if the tag resonates at the predetermined frequency. If the tag resonates properly, the third land is electrically coupled to the inductive element. If it does not, the second conductive pattern is adjusted so that overlapping portions of the first and second lands are changed, altering the capacitance to adjust the resonant tag frequency.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: August 9, 2005
    Assignee: Checkpoint Systems, Inc.
    Inventors: Eric Eckstein, Gary Mazoki, Peter Lendering, Luis Francisco Soler Bonnin, Takeshi Matsumoto, Lawrence Appalucci
  • Patent number: 6882162
    Abstract: A system for the wireless transmission of information and energy between a removable vehicle seat and the vehicle body, in which the vehicle seat is detected by measuring the inductance. In this connection, the period of an oscillating circuit is determined, in which the winding of the primary side, and thus the inductance, is connected. In this context, the frequency of the resonance voltage is determined as a function of time. In this context, the zero crossings of the resonance voltage is measured. Alternatively, the secondary side impedance is additionally measured on the primary side by a forced oscillation, namely by a voltage decay in a resonance circuit in which the winding is connected as inductance. A monitoring of the performance reliability of a firing pellet is thereby implemented.
    Type: Grant
    Filed: May 25, 2002
    Date of Patent: April 19, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Juergen Schirmer, Harald Kazmierczak
  • Patent number: 6882163
    Abstract: A measured value detecting apparatus includes a measuring unit possessing a winding coil capable of generating an output signal corresponding to a measured value and independent of a direct-current component, a detecting unit possessing a receiving unit for receiving the output signal and determining the measured value based upon the output signal received by the receiving unit, an output transmitting line for transmitting the output signal from the measuring unit to the detecting unit, a potential offsetting means for changing the direct-current component of the output signal on the output transmitting line, and a malfunction detecting means for detecting malfunction of the output transmitting line based upon the direct-current component of the output signal.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: April 19, 2005
    Assignee: Toyoda Koki Kabushiki Kaisha
    Inventor: Noritake Ura