Using A Comparison Or Difference Circuit Patents (Class 324/647)
  • Patent number: 10498467
    Abstract: In a general aspect, a motion detection system manages leaf nodes used for sounding by one or more access points. For example, an access point identifies one or more static leaf nodes based on presence activity of each leaf node in a calibration window. A health score is determined for each AP-leaf node link for each calibration window based on AP-leaf node link quality information. One or more of the static leaf nodes are selected to be used for sounding in the motion detection system based on the health scores for each of the AP-leaf node links. The motion detection system is then updated to use the selected one or more static leaf nodes for motion detection.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: December 3, 2019
    Assignee: Cognitive Systems Corp.
    Inventor: Mikhail Ravkine
  • Patent number: 10499364
    Abstract: In a general aspect, a motion detection system manages leaf nodes used for sounding by one or more access points. For example, an access point obtains presence information for a plurality of AP-leaf node links for a plurality of calibration periods. Presence activity is determined for each AP-leaf node link in each calibration period based on its respective presence information. Static leaf nodes are identified based on the presence activity for the plurality of AP-leaf node links in a calibration window, the calibration window comprising a number of the plurality of calibration periods. The motion detection system is updated to use at least one of the identified static leaf node as a sounding node for motion detection.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: December 3, 2019
    Assignee: Cognitive Systems Corp.
    Inventor: Mikhail Ravkine
  • Patent number: 10405222
    Abstract: There is provided a method for acquiring information regarding terrain and/or objects within a volume, said method comprising: transmitting signals over time (“node signals”) from one or more nodes of a wireless network (“subject network”); receiving the node signals after their traversing a medium (“node resultant signals”) using one or more receiving units (“node signal receivers”); measuring one or more physical attributes (“signal attributes”) for one or more of the node resultant signals, wherein at least one of the signal attributes is of at least one of the following types: (a) time difference between node signal transmission by the applicable transmitting subject network node and node resultant signal reception by the applicable node signal receiver; (b) phase difference between the transmitted node signal and the received node resultant signal; (c) power ratio between the transmitted node signal and the received node resultant signal; (d) frequency difference between the received node resultant signa
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: September 3, 2019
    Inventor: Gil Zwirn
  • Patent number: 9894091
    Abstract: An intelligent jack provides a physical port identifier (PPID) to an upstream device, such as a network switch. The network switch receives the PPID on a particular physical port. The network switch accesses port configuration data to configure the particular physical port, such as to a particular virtual local area network (VLAN). Port connection data associating the physical port with the PPID may be generated. Changes to the port connection data may generate an alarm.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: February 13, 2018
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventor: Rajdeep Larha
  • Patent number: 9703741
    Abstract: A communication device is provided. The communication device can include a processing device for communicating data via a data connection or receiving power via an electrical connection and a connector for providing the data connection or electrical connection. The connector can include at least one terminal and a sensing module. The terminal can be communicatively coupled to the processing device. The terminal can form the data connection or electrical connection with at least one external terminal of a mating connector. The sensing module can detect a movement associated with removing the mating connector. The sensing module can provide a termination signal to the processing device to terminate the data connection or electrical connection. The processing device can terminate data communication via the data connection or current flow via the electrical connection in response to the termination signal.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: July 11, 2017
    Assignee: CommScope Technologies LLC
    Inventors: Charles B. Morrison, Nelson Christian Schmidt, Jr., Van E. Hanson
  • Patent number: 9478966
    Abstract: A protection relay is provided for protection of an electric network. The protection relay measures an electric signal in the network, converts the measured signal to a frequency domain representation of the measured signal, and generates a measuring phasor based on the frequency domain representation, where the phase rotation of the measuring phasor is dependent on one or more frequency components present in the measured electric signal. The protection relay compares the measuring phasor to the reference phasor, where the phase rotation of the reference phasor is based on either a nominal or a measured frequency of the electric network, and launches protection if the comparison of the of the measuring phasor and the reference phasor fulfils a predetermined criterion.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: October 25, 2016
    Assignee: ABB Schweiz AG
    Inventors: Kari Vanhala, Petri Koivula
  • Publication number: 20150137831
    Abstract: A method of extracting complex impedance from selected volumes of the material under test (MUT) combined with various embodiments of electrode sensor arrays. Configurations of linear and planar electrode arrays provide measured data of complex impedance of selected volumes, or voxels, of the MUT, which then can be used to extract the impedance of selected sub-volumes or sub-voxels of the MUT through application of circuit theory. The complex impedance characteristics of the sub-voxels may be used to identify variations in the properties of the various sub-voxels of the MUT, or be correlated to physical properties of the MUT using electromagnetic impedance tomography and/or spectroscopy.
    Type: Application
    Filed: November 19, 2014
    Publication date: May 21, 2015
    Inventors: Sarah E. Pluta, Donald D. Colosimo, John W. Hewitt
  • 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
  • Patent number: 8990037
    Abstract: A measurement system, for use in RF power measurements, allows an arbitrary Bruene-type RF coupler to be calibrated at a number of different power levels and frequencies with an idealized transfer function being created for each calibration power point. Following calibration, when the coupler is used in an operational (measurement) mode, the DC voltage corresponding to the present power measurement is read, and the discrete idealized transfer functions generated during the power and frequency calibration phases are used to determine a best fit idealized transfer function, which is used in conjunction with the exact DC voltage being measured to create a highly accurate power measurement.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: March 24, 2015
    Inventor: Louis V. Pannone
  • Patent number: 8981794
    Abstract: A Dicke-switched radiometer including a signal channel comprising of an antenna for receiving an input signal and a first stage amplification circuit for amplifying an output of the antenna and generating an amplified input signal; a reference channel comprising of a resistive load, a second stage amplification circuit and a matching filter for matching a frequency and an impedance of the amplified input signal to a frequency and an impedance of the amplified reference signal; a Dicke switch coupled to first stage amplification circuit and the matching filter for inputting the amplified input signal and an output of the matching filter to generate a difference signal; a third stage amplification circuit coupled to an output of the Dicke switch for amplifying the difference signal; and a detector coupled to an output of the third stage amplification circuit to obtain the amplified difference signal and generate a detected difference signal.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: March 17, 2015
    Assignee: Raytheon Company
    Inventors: Michael Aidan Gritz, Steven Marc Lardizabal, Zhaoyang Charles Wang
  • Publication number: 20150054525
    Abstract: A method for measuring distance includes transmitting a first pair of RF pulses from an airborne interrogator, where the first pair of RF pulses are temporally separated from each other by a first time interval and each of the RF pulses in the first pair of RF pulses has a first pulse waveform. The method also includes receiving a second pair of RF pulses transmitted by a ground transponder. The RF pulses in the second pair of RF pulses have a second pulse waveform characterized by a smoothed concave polygonal function and/or a smoothed concave hexagonal function. The method further includes determining an elapsed time between transmitting the first pair of RF pulses and receiving the second pair of RF pulses and determining a distance between the airborne interrogator and the ground transponder based on at least the elapsed time.
    Type: Application
    Filed: July 21, 2014
    Publication date: February 26, 2015
    Inventor: Euiho Kim
  • Publication number: 20150054526
    Abstract: A method for measuring distance includes transmitting a first pair of RF pulses from an airborne interrogator, where the first pair of RF pulses are temporally separated from each other by a first time interval and each of the RF pulses in the first pair of RF pulses has a first pulse waveform. The method also includes receiving a second pair of RF pulses transmitted by a ground transponder. The RF pulses in the second pair of RF pulses have a second pulse waveform characterized by a filtered asymmetric Gaussian function or a smoothed trapezoidal function. The method further includes determining an elapsed time between transmitting the first pair of RF pulses and receiving the second pair of RF pulses and determining a distance between the airborne interrogator and the ground transponder based on at least the elapsed time.
    Type: Application
    Filed: July 21, 2014
    Publication date: February 26, 2015
    Inventor: Euiho Kim
  • Patent number: 8952707
    Abstract: Methods of detecting a plug insertion into a plug aperture of a communications connector are provided in which a control signal is transmitted to a control signal input circuit of the connector that includes a reactive coupling element. The control signal is electromagnetically coupled through the control signal input circuit. The electromagnetically coupled control signal is thereafter detected on a first differential pair of conductive paths that are included in the connector. A determination is made that a plug is present in the plug aperture based at least in part on detecting the electromagnetically coupled control signal on the first differential pair of conductive paths.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: February 10, 2015
    Assignee: CommScope, Inc. of North Carolina
    Inventors: Amid I. Hashim, Scott Lynn Michaelis, Ryan Enge
  • Patent number: 8947103
    Abstract: An inductive proximity switch for detecting the presence of an object in a monitored area includes a coil (2), a pulse source (4) for supplying the coil (2) with transmitting current pulses (S1, S2, S3) at a period (T) larger than the duration (Ts) of the transmitting current pulses, and a processing circuit (6) for generating an output signal (9) based on received voltages (Ui1, Ui2, Ui3) varying in dependence of a change of position of the object. The received voltages are induced in the coil (2) after the duration (Ts) of a transmitting current pulse by the decaying current which previously flows in the object due to the voltage induced therein by the coil. The proximity switch has a suppression circuit (13, 13a, 13b, 13c) for suppressing a signal duration lower than a predetermined perturbation time (Tc1, Tc2) in the output signal (9).
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: February 3, 2015
    Assignee: Optosys SA
    Inventors: Marc De Huu, Peter Heimlicher
  • Patent number: 8947106
    Abstract: Methods of detecting a plug insertion into a plug aperture of a communications connector are provided in which a control signal is received that is electromagnetically coupled across a plug aperture of the communications connector using a reactive coupling element. A determination may be made that a mating plug (e.g., an RJ-45 plug or a connector on a fiber optic jumper cable) has been inserted into the plug aperture based on this received control signal. Related connectors are also provided.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: February 3, 2015
    Assignee: CommScope, Inc. of North Carolina
    Inventors: Scott Lynn Michaelis, David Heckmann, Jeff Oberski
  • Patent number: 8933708
    Abstract: A proximity switch assembly and method for detecting activation of a proximity switch assembly is provided. The assembly includes a plurality of proximity switches each having a proximity sensor providing a sense activation field and control circuitry processing the activation field of each proximity switch to sense activation. The control circuitry monitors the signal responsive to the activation field and determines a differential change in generated signal, and further generates an activation output when the differential signal exceeds a threshold. The control circuitry further distinguishes an activation from an exploration of the plurality of switches and may determine activation upon detection of a stable signal.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: January 13, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Pietro Buttolo, Stuart C. Salter, Cornel Lewis Gardner, James Stewart Rankin, Matthew Majkowski
  • Patent number: 8928336
    Abstract: A vehicle proximity switch and method are provided having sensitivity control based on a user selected sensitivity input. The switch includes a proximity sensor such, as a capacitive sensor, installed in a vehicle and providing a sense activation field. The proximity switch also includes control circuitry for processing the sense activation field to sense user activation of the switch by comparing the sense activation field to a threshold. The proximity switch further includes a user sensitivity input for receiving a user selected sensitivity input. The control circuitry controls sensitivity of the comparison based on the user selected sensitivity input.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: January 6, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Stuart C. Salter, Cornel Lewis Gardner, Jeffrey Singer, Michael James Whitens
  • Publication number: 20140375336
    Abstract: A Dicke-switched radiometer including a signal channel comprising of an antenna for receiving an input signal and a first stage amplification circuit for amplifying an output of the antenna and generating an amplified input signal; a reference channel comprising of a resistive load, a second stage amplification circuit and a matching filter for matching a frequency and an impedance of the amplified input signal to a frequency and an impedance of the amplified reference signal; a Dicke switch coupled to first stage amplification circuit and the matching filter for inputting the amplified input signal and an output of the matching filter to generate a difference signal; a third stage amplification circuit coupled to an output of the Dicke switch for amplifying the difference signal; and a detector coupled to an output of the third stage amplification circuit to obtain the amplified difference signal and generate a detected difference signal.
    Type: Application
    Filed: June 25, 2013
    Publication date: December 25, 2014
    Inventors: Michael Aidan Gritz, Steven Marc Lardizabal, Zhaoyang Charles Wang
  • Patent number: 8860435
    Abstract: A locating appliance configured to sense an article includes a push-pull measurement bridge and a comparator. The push-pull measurement bridge is configured to actuate a first electromagnetic device and a second electromagnetic device, in each case in a variable ratio. The first electromagnetic device takes the actuation as a basis for producing an electromagnetic alternating field in a region of the article. The comparator is configured to sense the article if the variable ratio differs from a predetermined ratio by more than a predetermined amount.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: October 14, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Reiner Krapf, Tobias Zibold, Andrej Albrecht
  • Patent number: 8836344
    Abstract: In one aspect, a method to detect an object in an area includes forming a wireless network among a plurality of nodes, each of the nodes being configured to generate an electromagnetic field (EMF) in the area and determining changes in the EMF between two nodes based on: a first difference in received signal strength values between a previously determined received signal strength value and a currently determined received signal strength value, a second difference in received signal strength values between the currently determined received signal strength value and an average received signal strength value and a third difference in link quality values between a previously determined link quality value and a currently determined link quality value. The method further comprises detecting the object based on the changes in the EMF.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: September 16, 2014
    Assignee: Raytheon Company
    Inventors: Toni S. Habib, Wassim S. Habib, Teh-Kuang Lung
  • Patent number: 8823392
    Abstract: A system and method for controlling an impedance tuner system. In one embodiment, a web-enabled electronic controller controls an impedance tuner system including a signal transmission line and an electronically-controllable impedance-varying system coupled to the signal transmission line for affecting the impedance presented by the signal transmission line. The controller has a communication port, and an electronic processor configured to process external command signals and generate electronic control signals to configure the impedance-varying system in response to the command signals. An electronic memory stores sets of data and one or more web pages. The controller has a communication server and is configured to receive or send signals through a communication channel from or to a client computer system. The communication server is configured to be responsive to a request message from a client computer system to send a response comprising a web page to the client computer system.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: September 2, 2014
    Assignee: Maury Microwave, Inc.
    Inventor: Roman Meierer
  • Patent number: 8797051
    Abstract: A device determines a first voltage measurement of an output of a first brick. The device further determines a second voltage measurement associated with a second brick. The first brick is larger in size than the second brick. The device ramps up an output voltage of the second brick when the second voltage measurement is less than the first voltage measurement.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: August 5, 2014
    Assignee: Juniper Networks, Inc.
    Inventors: Jaspal Gill, David Owen
  • Publication number: 20140209587
    Abstract: A method includes receiving data corresponding to a voltage level over time and a current level over time. The method also includes determining a first ratio corresponding to a voltage ramp percent or a voltage falling edge percent with respect to a peak in the voltage level and determining a second ratio corresponding to a current ramp ratio or a current falling edge ratio with respect to a peak in the current level. The method further includes determining, based on a comparison between the first ratio and the second ratio, whether to increment, decrement, or maintain an inductance compensation estimation value corresponding to an estimated inductance present in one or more secondary components associated with the welding operation.
    Type: Application
    Filed: January 31, 2013
    Publication date: July 31, 2014
    Applicant: ILLINOIS TOOL WORKS INC.
    Inventors: Robert R. Davidson, Thomas A. Bunker, Richard Schuh
  • Publication number: 20140176158
    Abstract: A method and apparatus of determining the condition of a bulk tissue sample, by: positioning a bulk tissue sample between a pair of induction coils (or antennae); passing a spectrum of alternating current (or voltage) through a first of the induction coils (or antennae); measuring spectrum of alternating current (or voltage) produced in the second of the induction coils (or antennae); and comparing the phase shift between the spectrum of alternating currents (or voltages) in the first and second induction coils (or antennae), thereby determining the condition of the bulk tissue sample.
    Type: Application
    Filed: December 17, 2013
    Publication date: June 26, 2014
    Inventors: Boris Rubinsky, Cesar A. Gonzalez
  • Patent number: 8760176
    Abstract: Systems provide for a test system for capacitors in a digitally controllable oscillator (DCO). The system includes: capacitor toggling logic configured to switch on and off a selected one of the capacitors at a modulation frequency; a tone generator configured to generate a tone; a mixer configured to receive the tone and an output carrier signal from the DCO while the capacitor toggling logic is switching the selected one of the capacitors on and off and to output an intermediate frequency signal having FM sidebands based on the modulation frequency and relative capacitor size; and an evaluation circuit configured to evaluate a frequency deviation associated with the selected one of the capacitors based on at least one of the FM sidebands.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: June 24, 2014
    Assignee: St-Ericsson SA
    Inventor: Jeroen Kuenen
  • Patent number: 8754658
    Abstract: A method for controlling an amplitude of an incoming light is provided. The method includes attenuating a portion of the incoming light within a first band having a tunable peak attenuation wavelength using a tunable filter; passing a portion of the incoming light from the tunable filter within a second band using a fixed filter; and controlling the amplitude of the incoming light by tuning the peak attenuation wavelength of the tunable filter.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: June 17, 2014
    Assignee: Lockheed Martin Corporation
    Inventors: Timothy N. Miller, Kathleen A. Morse, Kevin William Russell Crispin
  • Publication number: 20140091814
    Abstract: An FET RF signal detector circuit comprising two unbalanced differential transistor pair circuits is disclosed. A current mirror output circuit is included for generating an output current derived from currents flowing in the differential transistor pair circuits. The first unbalanced differential transistor pair circuit comprises two branches, each with a respective tail, and a first variable resistor between the branch tails. The first unbalanced differential transistor pair circuit connects to a first current source tail arrangement. The second unbalanced differential transistor pair circuit comprises two branches, each with a respective tail, and a second variable resistor between the branch tails. The second unbalanced differential transistor pair circuit connects to a second current source tail arrangement.
    Type: Application
    Filed: September 18, 2013
    Publication date: April 3, 2014
    Applicant: NXP B.V.
    Inventors: Claire Boucey, Fabian Rivière, Sidina Wane
  • Patent number: 8659305
    Abstract: In a sensor control circuit, an impedance signal output unit has a HPF, a P/H circuit, a LPF, etc., and detects an element impedance of a sensor element on the basis of an impedance response signal which is alternately changed in response to an alternating current signal supplied to the sensor element. The P/H circuit has an input comparator which inputs an impedance detection voltage Vz after the HPF, a rectifying element connected to the P/H circuit, and a hold capacitor which is charged by the output of the input comparator. The input comparator has a constant current circuit and a transistor. The constant current circuit limits an updating value of a hold voltage value Vph of the hold capacitor every alternating current period. The sensor control device detects the element impedance of the sensor element with high accuracy while preventing influence of noise.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: February 25, 2014
    Assignee: Denso Corporation
    Inventor: Toshiyuki Suzuki
  • Publication number: 20140015547
    Abstract: A device with at least one channel for measuring high dynamic range, radio frequency (RF) power levels over broad-ranging duty cycles includes a power sensor circuit comprising at least one logarithmic amplifier; at least one directional RF coupler electrically connected to the at least one power sensor; at least one RF attenuator electrically connected to the at least one RF coupler; and at least one sampling circuit electrically connected to the at least one RF attenuator and the at least one RF coupler. The at least one sampling circuit performs analog-to-digital conversion of electrical signals received to provide digitals signals for measuring the RF power level in the at least one channel.
    Type: Application
    Filed: March 22, 2012
    Publication date: January 16, 2014
    Applicant: The Johns Hopkins University
    Inventors: Paul A. Bottomley, William Edelstein, Abdel-Monem M. El-Sharkawy, Di Qian
  • Publication number: 20140009171
    Abstract: For proximity detection, capacitance of a sensing element to ground is measured as one or more objects move into or out of proximity to the sensing element.
    Type: Application
    Filed: March 18, 2013
    Publication date: January 9, 2014
    Inventor: Daniel Arthur Ujvari
  • Publication number: 20140002108
    Abstract: A capacitive proximity sensor circuit capable of distinguishing between instances of detected user proximity includes one or more guard electrodes, a first sensor, and a second sensor. The capacitive proximity sensor is installed in a device such that a first sensor faces a first component of the device, and the second sensor faces a second component of the device. The first and second sensors measure a capacitance to detect proximity of a user relative to the respective sensor. The guard electrode is provided to mitigate stray capacitance to reduce error in the capacitance measurements obtained by the first and second sensors.
    Type: Application
    Filed: July 2, 2012
    Publication date: January 2, 2014
    Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD
    Inventors: Jenn Woei Soo, Kien Beng Tan
  • Patent number: 8598865
    Abstract: A measuring device with at least one control unit and an electrical current controller. The measuring- and operating electronics is connected to a current loop and the control unit is connected with the electrical current controller and provides the electrical current controller a reference input. The reference input corresponds to a desired value of the measurement signal current and the electrical current controller is suppliable with a primary feedback signal. The primary feedback signal corresponds to an actual value of the measurement signal current set in the current loop. The electrical current controller outputs a control signal formed from a control error signal, wherein at least one evaluation unit is provided, which compares at least one value of the control signal output by the electrical current controller with at least one reference value. The comparison indicates whether the value of the control signal exceeds or subceeds the reference value.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: December 3, 2013
    Assignee: Endress + Hauser Flowtec AG
    Inventors: Jiri Karbula, Andreas Fuz
  • Publication number: 20130307564
    Abstract: Various embodiments include solutions for in-process material characterization. Various particular embodiments include a computer-implemented method including: providing instructions for transmitting oscillating electromagnetic field signals to a material under test (MUT); obtaining a return signal associated with the transmitted oscillating electromagnetic field signals; comparing the return signal with the oscillating electromagnetic field signals to determine a difference in an aspect of the return signal and the aspect of the oscillating electromagnetic field signals; comparing the difference in the aspect to a predetermined threshold; and determining a characteristic of the MUT based upon the compared difference.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 21, 2013
    Applicant: TransTech Systems, Inc.
    Inventors: Donald D. Colosimo, Sarah E. Pluta
  • Publication number: 20130291439
    Abstract: A capacitive sensor unit is disposed for contactlessly actuating a vehicle door. The sensor unit has an electrode assembly with at least three electrodes that are disposed in a spaced relationship. The electrodes include a first transmitting electrode, a second transmitting electrode, and a receiving electrode arranged between the two transmitting electrodes.
    Type: Application
    Filed: July 11, 2013
    Publication date: November 7, 2013
    Inventors: HOLGER WUERSTLEIN, ANDRE GUNREBEN
  • Publication number: 20130271157
    Abstract: A proximity switch assembly and method for detecting activation of a proximity switch assembly is provided. The assembly includes a plurality of proximity switches each having a proximity sensor providing a sense activation field and control circuitry processing the activation field of each proximity switch to sense activation. The control circuitry monitors the signal responsive to the activation field and determines a differential change in generated signal, and further generates an activation output when the differential signal exceeds a threshold. The control circuitry further distinguishes an activation from an exploration of the plurality of switches and may determine activation upon detection of a stable signal.
    Type: Application
    Filed: April 11, 2012
    Publication date: October 17, 2013
    Applicant: Ford Global Technologies, LLC
    Inventors: Pietro Buttolo, Stuart C. Salter, Cornel Lewis Gardner, James Stewart Rankin, Matthew Majkowski
  • Patent number: 8482299
    Abstract: A method of detecting the position of the armature (3) of an electromagnetic actuator arranged and able to move between first and second coils (1, 2), in which a voltage jump (UB) is applied to the first and the second coils (1, 2) of the actuator connected in series. The first and the second coils (1, 2) form a voltage divider in accordance with the impedance coil principle. The voltage (U1) of the first coil (1) and the voltage (U2) of the second coil (2) are measured and, from the measurement data for the voltages at the first and the second coils (1, 2), the quotient of the difference (?U) between the two voltage values and the voltage jump (UB), normalized in relation to the size of the voltage jump (UB) is calculated, and a specific armature stroke is correlated one-to-one with each value of the quotient.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: July 9, 2013
    Assignee: ZF Friedrichshafen AG
    Inventors: Michael Pantke, Jorg Kurth
  • Patent number: 8482297
    Abstract: A system for testing a DC power supply performance includes a comparison module, a judge module, and an alarm module. The comparison module receives DC voltage signals from the DC power supply, compares the DC voltage signals with a reference voltage respectively, and outputs a voltage level signal when the DC power supply is normal. The judge module receives the voltage level signal, and outputs a control signal according to the voltage level signal. The alarm module receives the control signal, and indicates status of the DC power supply according to the control signal.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: July 9, 2013
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventor: Ling-Yu Xie
  • Publication number: 20130120004
    Abstract: A locating appliance configured to sense an article includes a push-pull measurement bridge and a comparator. The push-pull measurement bridge is configured to actuate a first electromagnetic device and a second electromagnetic device, in each case in a variable ratio. The first electromagnetic device takes the actuation as a basis for producing an electromagnetic alternating field in a region of the article. The comparator is configured to sense the article if the variable ratio differs from a predetermined ratio by more than a predetermined amount.
    Type: Application
    Filed: November 6, 2012
    Publication date: May 16, 2013
    Applicant: Robert Bosch GmbH
    Inventor: Robert Bosch GmbH
  • Publication number: 20130038337
    Abstract: A method, implemented by a software-controlled computer device and/or by dedicated hardware, for probing an electrically conductive target material, e.g. molten metal or semiconductor material, in a metallurgical vessel. In the method, a measurement signal is acquired from a sensor, which is inserted into the target material, during a relative displacement between the electrically conductive target material and the sensor, the measurement signal being indicative of electrical conductivity in the vicinity of the sensor. The measurement signal is generated to represent momentary changes in an electromagnetic field around the sensor, which is created by operating at least one coil in the sensor. Based on the measurement signal, a signal profile is generated to be indicative of the electrical conductivity as a function of the relative movement. The method enables a probing of the internal distribution of the target material in the vessel at any level of detail.
    Type: Application
    Filed: April 27, 2011
    Publication date: February 14, 2013
    Applicant: AGELLIS GROUP AB
    Inventors: Albert Rodfalk, Jan-Peter Nilsson, Patrik Bloemer, Anthony Lyons
  • Publication number: 20120313648
    Abstract: A vehicle proximity switch and method are provided having sensitivity control based on a user selected sensitivity input. The switch includes a proximity sensor such, as a capacitive sensor, installed in a vehicle and providing a sense activation field. The proximity switch also includes control circuitry for processing the sense activation field to sense user activation of the switch by comparing the sense activation field to a threshold. The proximity switch further includes a user sensitivity input for receiving a user selected sensitivity input. The control circuitry controls sensitivity of the comparison based on the user selected sensitivity input.
    Type: Application
    Filed: June 9, 2011
    Publication date: December 13, 2012
    Inventors: Stuart C. Salter, Cornel Lewis Gardner, Jeffrey Singer, Michael James Whitens
  • Publication number: 20120303305
    Abstract: An electronic circuit detecting proximity includes an excitation coil emitting an inductive excitation field toward a target. A first pair of detection coils obtains a first differential inductive signal that is modified by a transition of the target within the inductive field. An out-of phase second pair of detection coils obtains a second differential inductive signal that is modified by a transition of the target within the inductive field. A comparator generates a transition signal when the difference between the first and second differential signals reaches a threshold value. A stationary target, in a ferromagnetic or conductive material, creates an offset to the signals at the outlet of the coil pairs. The offset is decreased during the presence of a movable target within the same type of material or increased during the presence of a movable target within another type of material. A comparator detects the offset level.
    Type: Application
    Filed: June 13, 2012
    Publication date: November 29, 2012
    Inventors: Johan Bergqvist, Sietse Wouters
  • Patent number: 8314621
    Abstract: A unit cell of a narrow band filter is provided. The unit cell includes a matrix body having a first permittivity and an inclusion body having a second permittivity and disposed in the matrix body. The matrix body and the inclusion body are configured to reflect electromagnetic radiation incident on electromagnetic radiation facing surfaces of the matrix body and the inclusion body. A bandwidth of the reflected electromagnetic radiation is based on a difference between the first permittivity and a third permittivity, which is an average permittivity between the first permittivity and the second permittivity based on volumes of the inclusion body and a portion of the matrix body. The inclusion body is configured such that the second permittivity is adjustable to adjust the third permittivity, thereby adjusting the difference between the first permittivity and the third permittivity. A narrow band filter and a method are also disclosed.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: November 20, 2012
    Assignee: Lockheed Martin Corporation
    Inventor: Kathleen A. Morse
  • Publication number: 20120112768
    Abstract: Systems provide for a test system for capacitors in a digitally controllable oscillator (DCO). The system includes: capacitor toggling logic configured to switch on and off a selected one of the capacitors at a modulation frequency; a tone generator configured to generate a tone; a mixer configured to receive the tone and an output carrier signal from the DCO while the capacitor toggling logic is switching the selected one of the capacitors on and off and to output an intermediate frequency signal having FM sidebands based on the modulation frequency and relative capacitor size; and an evaluation circuit configured to evaluate a frequency deviation associated with the selected one of the capacitors based on at least one of the FM sidebands.
    Type: Application
    Filed: May 19, 2011
    Publication date: May 10, 2012
    Applicant: ST-ERICSSON SA
    Inventor: Jeroen KUENEN
  • Publication number: 20120062242
    Abstract: An inductive proximity switch for detecting the presence of an object in a monitored area includes a coil (2), a pulse source (4) for supplying the coil (2) with transmitting current pulses (S1, S2, S3) at a period (T) larger than the duration (Ts) of the transmitting current pulses, and a processing circuit (6) for generating an output signal (9) based on received voltages (Ui1, Ui2, Ui3) varying in dependence of a change of position of the object. The received voltages are induced in the coil (2) after the duration (Ts) of a transmitting current pulse by the decaying current which previously flows in the object due to the voltage induced therein by the coil. The proximity switch has a suppression circuit (13, 13a, 13b, 13c) for suppressing a signal duration lower than a predetermined perturbation time (Tc1, Tc2) in the output signal (9).
    Type: Application
    Filed: September 2, 2011
    Publication date: March 15, 2012
    Inventors: Marc DE HUU, Peter HEIMLICHER
  • Publication number: 20120025849
    Abstract: In one aspect, a method to detect an object in an area includes forming a wireless network among a plurality of nodes, each of the nodes being configured to generate an electromagnetic field (EMF) in the area and determining changes in the EMF between two nodes based on: a first difference in received signal strength values between a previously determined received signal strength value and a currently determined received signal strength value, a second difference in received signal strength values between the currently determined received signal strength value and an average received signal strength value and a third difference in link quality values between a previously determined link quality value and a currently determined link quality value. The method further comprises detecting the object based on the changes in the EMF.
    Type: Application
    Filed: July 22, 2011
    Publication date: February 2, 2012
    Applicant: Raytheon Company
    Inventors: TONI S. HABIB, WASSIM S. HABIB, TEH-KUANG LUNG
  • Publication number: 20110267215
    Abstract: A method for determining a phase constant for a dielectric medium is provided. The method includes deploying a calibration object with a known free-space spectral response within a dielectric medium of interest, determining the spectral response of the calibration object deployed in the dielectric medium, and determining the phase constant for the dielectric medium using a relationship between the free-space spectral response of the calibration object and the spectral response of the calibration object when deployed in the dielectric medium.
    Type: Application
    Filed: August 13, 2008
    Publication date: November 3, 2011
    Inventors: Samuel Allan Barr, William David Maynard
  • Publication number: 20110074442
    Abstract: A method for impedance measurements, using synchronous detecting and modified rectangular signals. The method comprises introducing a first modified rectangular signal into a bioobject, receiving a response signal from said bioobject, introducing said response signal and a second modified rectangular signal into a synchronous detector, whereas either one or both rectangular signals are modified to remove particular higher harmonics from the signal. In one embodiment, either one or both the first and the second modified rectangular signals are generated by summing at least two modified rectangular signals, wherein at least one of such rectangular signals have a zero amplitude segment introduced between rectangular half periods.
    Type: Application
    Filed: May 12, 2009
    Publication date: March 31, 2011
    Applicants: TALLINN UNIVERSITY OF TECHNOLOGY, OU ELIKO TEHNOLOOGIA ARENDUSKESKUS
    Inventors: Mart Min, Paul Annus, Jaan Ojarand
  • Patent number: 7812616
    Abstract: A system and method to detect changes in composite structures using RF signal pattern data interpretation. An RF signal is transmitted from a composite material manufactured structure and a plurality of sensors are employed to measure the RF signal. The measured RF signal is compared to a stored baseline RF signal for the particular structure. Deviations in the measured RF pattern for the structure, or for a structurally-similar composite structure, are automatically analyzed to detect non-visually-detectable defects or other changes in the composite structure. A baseline RF signature is developed for a structure by transmitting a reference RF signal from the composite structure. RF signals are detected by a variety of methods, and the detected signals are compiled and translated into reference and/or test RF signal patterns for the structure.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: October 12, 2010
    Assignee: Arinc Incorporated
    Inventor: William George Doyen
  • Patent number: 7805265
    Abstract: A method for measuring electric circuit parameters of a 2-terminal circuit having first and second terminals, includes steps of: terminating one of the first and second terminals with a terminal impedance Z1, to measure reflection characteristics ?1 for the other terminal; terminating one of the first and second terminals with a terminal impedance Z2 different from the terminal impedance Z1, to measure reflection characteristics ?2 for the other terminal; terminating one of the first and second terminals with a terminal impedance Z3 different from the terminal impedances Z1 and Z2, to measure reflection characteristics ?3 for the other terminal; and calculating electric circuit parameters of the 2-terminal circuit based on the resultant reflection characteristics ?1, ?2 and ?3, whereby measuring electric circuit parameters, such as S-parameters, Z-parameters or the like, even of a DUT having a weak ground, in a simple way with high accuracy and low cost.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: September 28, 2010
    Assignee: Panasonic Corporation
    Inventors: Akihiko Namba, Tetsuyoshi Ogura, Toru Yamada
  • Patent number: 7616008
    Abstract: An AC impedance measurement system is used for measuring the impedance of a DUT. A measured voltage is applied to a first DUT terminal by a first digital to analog converter, the voltage appearing at the second terminal of the DUT is monitored through an analog to digital converter and forced by a second digital to analog converter to a desired negligible value, and a digital controller determines the impedance of the DUT from the measured voltage and the current necessary to force the voltage appearing at the second terminal to the desired negligible value.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: November 10, 2009
    Assignee: Keithley Instruments, Inc.
    Inventors: Michael D. Rayman, Gregory Sobolewski, Wayne C. Goeke