Span Or Set Point Adjustment (e.g., Zero Correction) Patents (Class 73/1.88)
  • Patent number: 9958474
    Abstract: A pointer is rotational relative to the screen. A driver unit rotates the pointer. An imaging device detects an image of the pointer sends a signal of the image. A controller receives the signal of the image from the imaging device. The screen indicates a graphic. The controller modifies the graphic according to the signal of the image.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: May 1, 2018
    Assignees: DENSO International America, Inc., DENSO CORPORATION
    Inventors: Ke Bi, Takaaki Muramatsu, Jill DeGowske
  • Patent number: 9003863
    Abstract: A controlling unit and a method of correcting an actual limit value of a sensor signal is described, wherein above or below the limit value a specific state of the sensor is recognized, the method including the steps of determining a new limit value of the sensor, determining a stability criteria to decide whether the actual limit value is corrected with said new limit value and approaching the actual limit value to the new limit value when the conditions are fulfilled to correct the actual limit value for said sensor.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: April 14, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Andreas Kirsch, Christoph Biggel
  • Patent number: 9000824
    Abstract: An offset cancel circuit includes a first amplifying section, a second amplifying section, a third resistor connected between a non-inverting input terminal of the first amplifying section and a non-inverting input terminal of the second amplifying section, and a current source. In the offset cancel circuit, the current source causes a constant current to flow through the third resistor to cancel an offset voltage from output signals of first and second amplifying sections, the constant current corresponding to the offset voltage contained in first and second output signals output from a bridge resistance type sensor.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: April 7, 2015
    Assignee: Yamaha Corporation
    Inventors: Masato Miyazaki, Toshio Maejima
  • Patent number: 8869585
    Abstract: Methods and systems for calibrating a sensor for measuring an analyte in a patient monitoring system are disclosed. The method includes calculating sensor drift; calibrating the sensor using at least one calibration fluid; and periodically updating the sensor calibration based on the sensor drift calculation. The system adjusts a gas concentration in a fluid. The method in one of several variations includes providing a calibration fluid; setting the analyte concentration in the first fluid to a first concentration with an adjustment mechanism; measuring the first analyte concentration with the sensor; setting the analyte concentration in the first fluid to a second concentration; measuring the second analyte concentration with the sensor; and determining the calibration coefficients for the sensor from the measured first and second analyte concentrations.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: October 28, 2014
    Assignee: Sphere Medical Limited
    Inventors: Gavin Troughton, Peter Laitenberger
  • Patent number: 8838404
    Abstract: A pressure detector detecting a pressure of cold or hot water; a temperature detector detecting a temperature of a pressure sensor; correcting equation storage storing, cold water correcting equation information applied when the temperature detected by the temperature detector is included in a cold water temperature range, and hot water correcting equation information applied when the temperature detected by the temperature detector is included in a hot water temperature range; a temperature range determiner determining the temperature range that includes the temperature detected by the temperature detector as either a cold water temperature range or a hot water temperature range; and a correction calculating portion using the correcting equation corresponding to the temperature range determined by the temperature range determiner correcting the detection signal by the pressure detector, and outputting the post-correction signal as a measurement signal.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: September 16, 2014
    Assignee: Azbil Corporation
    Inventor: Tomohisa Sasaki
  • Patent number: 8770009
    Abstract: An arrangement and method for providing compensation to a cyclical input signal is disclosed. The arrangement comprises a first detection unit (20) for detecting a first event in a cyclical output signal; a compensation signal generation unit (14) for generating a compensation signal; and a signal combination unit (8) for combining the compensation signal and the cyclical input signal to obtain the cyclical output signal. The compensation signal generation unit (14) is arranged to adjust the compensation signal at an instant which has a determined relationship with the detection of the first event. By adjusting the compensation signal at the right instant in a cycle of the cyclical output signal, the adjustment will not influence the further processing of the cyclical output signal. The method can be used to compensate the offset and sensitivity characteristics of a sensor.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: July 8, 2014
    Assignee: Sensata Technologies, Inc.
    Inventors: Tim Tiek, Paulus Thomas Gennissen
  • Patent number: 8689604
    Abstract: An integrated circuit includes a transducer and transducer circuitry and additional elements useful in testing the transducer and transducer circuitry. A first power supply terminal and a second power supply terminal are for being directly connected to an external power supply terminal. A power bus is connected to the first power supply terminal. A logic function is for determining if the second power supply terminal is receiving power and if an automatic calibration test of the transducer and transducer circuitry has been run. An automatic calibration is for running an automatic calibration test on the transducer and transducer circuitry if the logic means determines that the second power supply terminal is receiving power and the automatic calibration test of the transducer and transducer circuitry has not been run.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: April 8, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Peter S. Schultz, Sung-Jin Jo
  • Patent number: 8683850
    Abstract: A bias value associated with a sensor, e.g., a time-varying, non-zero value which is output from a sensor when it is motionless, is estimated using at least two, different bias estimating techniques. A resultant combined or selected bias estimate may then be used to compensate the biased output of the sensor in, e.g., a 3D pointing device.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: April 1, 2014
    Assignee: Hillcrest Laboratories, Inc.
    Inventors: Hua Sheng, Matthew G. Liberty, Christopher D. Roller, Charles W. K. Gritton
  • Patent number: 8590361
    Abstract: Zero and calibration drift errors in a magnetic flow meter can be detected and automatically corrected. A zero error can be detected by measuring an amplifier output when the meter's electromagnet is inactive. Automatic calibration of the span can be done by adding a signal to a measured electrode voltage at an amplifier input, subtracting the expected amplified value of that signal at the output and adjusting the amplifier gain responsive to the difference in signal magnitude.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: November 26, 2013
    Assignee: Onicon, Inc.
    Inventor: Murray F Feller
  • Patent number: 8534115
    Abstract: Systems and methods of determining parameter values in a downhole environment are described. An example method of determining a parameter value using calibration information is described. The calibration information corresponding to different parameter ranges in a downhole environment. The method includes determining a parameter range in the downhole environment using a controller and obtaining first calibration information or second calibration information based on the parameter range. The first calibration information associated with a first parameter range and the second calibration information associated with a second parameter range. The method also includes receiving an output signal from a sensor associated with the parameter and using the obtained calibration information to determine the parameter value based on the output signal received.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: September 17, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Kozue Tomiyama, Toru Terabayashi, Hideyuki Kamei, Takenori Motoki, Tetsuya Tanaka, Martine Hori
  • Patent number: 8447551
    Abstract: An assembly tool is provided. The assembly tool comprises a body and a gripper mount slidably mounted to the body with a first actuator. The first actuator is configured to slide the gripper mount from a first position to a second position along an axis. The assembly tool also comprises a gripper assembly slidably mounted to the gripper mount with a second actuator. The second actuator is configured to facilitate displacement of the gripper assembly with respect to the gripper mount along the axis. The assembly tool also comprises an encoder configured to indicate a displacement distance between an expected position and an actual position of the gripper assembly with respect to the gripper mount along the axis when the gripper mount is in the second position.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: May 21, 2013
    Assignee: Western Digital Technologies, Inc.
    Inventors: Tze Yang Ong, Jit Han Tan
  • Patent number: 8434345
    Abstract: An apparatus for improving the procedure for quantifying the volume of liquid dispensed by a liquid-dispensing mechanism of an analytical instrument. The apparatus of this invention comprises (a) at least one weigh cup; (b) at least one standard mass; (c) at least one transducer assembly to convert a value of weight to an electrical response; and (d) at least one electronic circuit for converting the electrical response to a measurement of volume. This invention provides a method for calibrating readings of the volume of liquid dispensed by a liquid-dispensing mechanism of an analytical instruments so that absolute measurements of the volume of liquid dispensed can be obtained.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: May 7, 2013
    Assignee: Abbott Laboratories
    Inventors: Kurt M. Klosterman, Ganesh Rajagopal, Larry R. Jibson, James L. Dempski, Paul A. Matuszewski, Jeffrey W. Stewart, Jeffrey R. Swanson, David M. Tipotsch, Randall E. Youngs, Noman A. Abunimeh
  • Patent number: 8412478
    Abstract: Device for determining an error induced by a high-pass filter in a signal, including a unit (3) for calculating the error according to the formula: E(t)=Ve(t)?Vs(t)=2·?·Fc·??=t0t(Vs(?)? Vs(?))·d?+E(t0) with: E(t) the value of the error induced by the high-pass filter, as a function of the time variable t, ?the trigonometric constant, Fc the cutoff frequency of the high-pass filter, t0 the initial instant, ?integration variable, Ve the signal input to the high-pass filter, Vs the signal output by the high-pass filter, Vs the mean value of the signal Vs. A method of correcting the error induced is also presented and applicable to the error correction of a piezoelectric pressure sensor.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: April 2, 2013
    Assignee: Continental Automotive France
    Inventors: Alain Ramond, Simon-Didier Venzal, Michel Suquet
  • Patent number: 8407022
    Abstract: A bias value associated with a sensor, e.g., a time-varying, non-zero value which is output from a sensor when it is motionless, is estimated using at least two, different bias estimating techniques. A resultant combined or selected bias estimate may then be used to compensate the biased output of the sensor in, e.g., a 3D pointing device.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: March 26, 2013
    Assignee: Hillcrest Laboratories, Inc.
    Inventors: Hua Sheng, Matthew G. Liberty, Christopher D. Roller, Charles W. K. Gritton
  • Patent number: 8371151
    Abstract: The present invention relates to a method of detecting non-linear operation of a measuring device comprising an array of transducers and at least one receiver channel portion. The method comprises receiving measured signals through transducers of the array, processing the measured signals from the transducers through the receiver channel portion, combining the processed measured signals to produce a combined measurement signal, and detecting non-linearity of the combined measurement signal and non-linear operation of the measuring device by detecting saturation of the receiver channel portion. In one embodiment, the receiver channel portion comprises an analog-to-digital converter, a threshold is assigned to a digital output of the analog-to-digital converter, and saturation of the receiver channel portion is detected when the digital output of the analog-to-digital converter oversteps the assigned threshold. In one application of the invention, the measuring device is a non-destructive testing device.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: February 12, 2013
    Assignee: Olympus NDT
    Inventors: Pierre Langlois, Michael Drummy
  • Patent number: 8111032
    Abstract: An indicating instrument for a vehicle includes a step motor including a field winding, a pointer, a stopper device for stopping the pointer, which is rotating in a zero-reset direction, at a stopper position, a detecting device for detecting induced voltage of the field winding at each of detecting points, a control device for performing zero-reset control, whereby a drive signal is controlled to rotate the pointer in the zero-reset direction. In a state of abnormal detection in which the induced voltage larger than a predetermined set value is detected at a zero point; and the induced voltage equal to or smaller than the set value is detected at a next detecting point to the zero point, the control device assumes synchronization loss of the step motor and continues the zero-reset control until an assumptive electrical angle corresponding to a rotational position of the pointer reaches the zero point.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: February 7, 2012
    Assignee: Denso Corporation
    Inventor: Hideyuki Nakane
  • Patent number: 8102139
    Abstract: An indicating instrument includes a step motor having a field winding, a pointer, a reduction gear mechanism having gears, a stopper device for stopping the pointer at a stopper position, a detecting device for detecting induced voltage of the winding at each of detecting points that include a zero point corresponding to the stopper position, a control device for controlling a drive signal, and an updating device for updating the zero point based on the induced voltage during zero-reset control performed by the control device. The control device performs return control, whereby the pointer rotates to a return point in an indication value increasing direction and then returns to a waiting point in a zero-reset direction to stand by at the waiting point, prior to zero-reset control, whereby the pointer rotates from the waiting point in the zero-reset direction.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: January 24, 2012
    Assignee: Denso Corporation
    Inventor: Hideyuki Nakane
  • Patent number: 7958769
    Abstract: The present invention relates to a method of detecting non-linear operation of a measuring device comprising an array of transducers and at least one receiver channel portion. The method comprises receiving measured signals through transducers of the array, processing the measured signals from the transducers through the receiver channel portion, combining the processed measured signals to produce a combined measurement signal, and detecting non-linearity of the combined measurement signal and non-linear operation of the measuring device by detecting saturation of the receiver channel portion. In one embodiment, the receiver channel portion comprises an analog-to-digital converter, a threshold is assigned to a digital output of the analog-to-digital converter, and saturation of the receiver channel portion is detected when the digital output of the analog-to-digital converter oversteps the assigned threshold. In one application of the invention, the measuring device is a non-destructive testing device.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: June 14, 2011
    Assignee: Olympus NDT
    Inventors: Pierre Langlois, Michael Drummy
  • Patent number: 7950265
    Abstract: A system for preventing overflow of a toilet includes a sensor, a processor and an actuator. The sensor senses a parameter caused by fluid dynamics within the toilet during a flush cycle. The parameter may involve vibration, sound, pressure, fluid flow rate or other detectible characteristics of the toilet. The processor uses information regarding the parameter that is gathered by the sensor to evaluate the condition of the flush cycle to determine if an impeded flush condition exists. In the event of an impeded flush condition, the processor directs the actuator to close a valve, which may be the toilet flapper valve in some embodiments. Also disclosed are methods for preventing toilet overflow, detecting an impeded flush condition and calibrating the system.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: May 31, 2011
    Assignee: Limit, Inc.
    Inventors: Kevin Bowcutt, Ahmed Shishegar, Matthew Ibarra, Daniel L. Corbin, Dennis Repp, Robert M. Connell, Oscar Dufau, Gregory Blake, Sam Iravantchi
  • Patent number: 7913536
    Abstract: An arrangement and method for providing compensation to a cyclical input signal is disclosed. The arrangement comprises a first detection unit (20) for detecting a first event in a cyclical output signal; a compensation signal generation unit (14) for generating a compensation signal; and a signal combination unit (8) for combining the compensation signal and the cyclical input signal to obtain the cyclical output signal. The compensation signal generation unit (14) is arranged to adjust the compensation signal at an instant which has a determined relationship with the detection of the first event. By adjusting the compensation signal at the right instant in a cycle of the cyclical output signal, the adjustment will not influence the further processing of the cyclical output signal. The method can be used to compensate the offset and sensitivity characteristics of a sensor.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: March 29, 2011
    Assignee: Sensata Technologies Holland B.V.
    Inventors: Tim Tiek, Paulus Thomas Johannes Gennissen
  • Patent number: 7844414
    Abstract: A method of calibrating an individual sensor of a particular sensor type whose output varies non-linearly with at least one measured quantity and at least one operating condition. The first step includes producing a set of calibration curves for each sample sensor of the particular sensor type. The resulting sets of calibration curves are then averaged and the results used to produce a generic calibration surface for the particular sensor type showing its variation. Individual calibration measurements are then taken for a number of different values of the measured quantity at a small number of discrete values. The individual calibration readings are then used to map the generic calibration surface to the individual calibration measurements of the individual sensor.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: November 30, 2010
    Assignee: Transense Technologies PLC
    Inventor: Victor Alexandrovich Kalinin
  • Patent number: 7805975
    Abstract: A method of calibrating a metabolic analyzer incorporating an oxygen analyzer and a NDIR carbon dioxide analyzer in the field that does not require the use of gas cylinders containing gases of known concentration is described. In calibrating the CO2 detector, at the time of factory setup, the detector output for a gas of a known concentration is measured and stored in the memory of the metabolic analyzer's microprocessor, as is the detector output voltage when the IR source is dimmed by a known percentage. Subsequently, in the field, CO2 levels in ambient air and cell pressure are measured at two different flow rates through the sample chamber and the IR source is again dimmed by the same percentage as had been used at the time of factory setup. Based upon the resulting readings, both the zeroing and span adjustment factors can be computed.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: October 5, 2010
    Assignee: Medical Graphics Corporation
    Inventors: C. Peter Howard, Yu Chen, Michael G. Snow
  • Patent number: 7730759
    Abstract: For calibrating a humidity sensor, the latter is used to measure the relative humidity (U1, U2) at each of two known gas pressure values (P1, P2), likewise to be measured if necessary. At the same time, other ambient conditions are kept constant. A correction value for correction of the measured values of the humidity sensor to be subtracted from the latter is then obtained from the formula: k=((P1/P2)*U2?U1)/(P1/P2?1). The humidity sensor is thus capable of calibration without measurement of the actual humidity value.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: June 8, 2010
    Assignee: Testo AG
    Inventors: Martin Rombach, Markus Langenbacher
  • Patent number: 7660687
    Abstract: A method of increasing consistency between separate parametric measurement readings that are taken with an electron beam imaging tool at different times within a period of time, by correcting drift in the imaging tool at a time frequency that is less than a time period during which the drift is anticipated to be undesirably large.
    Type: Grant
    Filed: May 25, 2006
    Date of Patent: February 9, 2010
    Assignee: KLA-Tencor Corporation
    Inventors: Indranil De, Mark A. McCord, David L. Adler
  • Patent number: 7614274
    Abstract: A method for verifying the adjustment of a plurality of measurement instruments includes measuring a first value of an un-verified test value of a parameter with a first measurement instrument; measuring a second value of the same un-verified test value of a parameter with a second measurement instrument; comparing the first value with the second value; and determining an adjustment verification state based on the comparison.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: November 10, 2009
    Assignee: Keithley Instruments, Inc.
    Inventor: Wayne C. Goeke
  • Patent number: 7550981
    Abstract: A circuit and method for determining the wiper resistance of a potentiometer that includes the step of electrically coupling a sense resistor having a substantially constant sense resistance to the potentiometer third terminal. The potentiometer is electrically energized, and a potentiometer voltage, which is a voltage potential between the potentiometer first and second terminals, is determined. The wiper position is determined based at least in part on the determined potentiometer voltage. The sense resistor is electrically coupled to a potential that causes a wiper current to flow through the wiper and sense resistor. A magnitude of the wiper current is determined, and the wiper resistance is determined based at least in part on the potentiometer resistance, the determined potentiometer position, the determined wiper current magnitude, and the sense resistance.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: June 23, 2009
    Assignee: Honeywell International Inc.
    Inventor: Mark F. Merry
  • Publication number: 20090100902
    Abstract: A programmable liquid sampler for obtaining and digitally analyzing multiple, sequential samples in real time from an external source of liquid to be analyzed comprises an adaptive feedback algorithm for correcting sample weight measurements occasioned by vacuum delays. A sampling assembly receives and at least temporarily stores a sample drawn by suction through an air port that can also pressurize the chamber. A load cell determines sample mass through a logic controller that implements adaptive feedback by recognizing a desired target sample size, requesting an initial sample, and measuring the initial sample size. A variable scaling factor is derived by comparing the target sample size to said measured sample size and the subsequent requesting size is scaled. Samples can be stored in multiple compartments of a radial table that is indexed by the computer software for proper sample control.
    Type: Application
    Filed: October 19, 2007
    Publication date: April 23, 2009
    Inventors: John Kevin Miller, Tony Ray Sage, Robert M. Gilliom
  • Publication number: 20090100903
    Abstract: An apparatus including: an optical sensor comprising an optical transmitter and an optical receiver; and a calibration system configured to change calibration of the sensor when a measurement taken at the optical receiver, while the optical transmitter is on and the apparatus is in use, passes a test.
    Type: Application
    Filed: October 23, 2007
    Publication date: April 23, 2009
    Inventor: Niko Santeri Porjo
  • Publication number: 20090056410
    Abstract: A self-diagnostic measurement method to detect microbridge null drift and performance. An ASIC can be designed to include a self-diagnostic feature that automatically occurs at start up or upon command in Normal Operation whereby the temperature compensated microbridge null can be measured in a state of very low thermal energy and allows for the tracking of microbridge null stability versus time. An Airflow Combi-Sensor ASIC (Heimdal) with its strategic partner ZMD can be developed and can be implemented in the form of a self-diagnostic feature that occurs when power is first applied to the ASIC or upon command. When the self-diagnostic is initiated, power is removed and after the electronics have settled, a small power can be applied to the microbridge to measure the bridge null with reduced sensitivity to flow due to self-heating.
    Type: Application
    Filed: August 29, 2007
    Publication date: March 5, 2009
    Inventors: Lamar F. Ricks, Paul P. Bey
  • Publication number: 20090049887
    Abstract: A sensor incorporates a dual range ASIC (Application Specific Integrated Circuit) for accurately sensing and measuring sensor input over extensive range along with an improved resolution. The sensor can incorporate an ASIC utilizing signals from a MEMS-based piezoresistive Wheatstone bridge. Signals can also come from capacitive pressure measurement sources. The signals can be converted to digital bit counts where calibration coefficients can be implemented to achieve high precision. The calibration coefficients corresponding to bit counts can be compared with transition points that are recorded into ASIC for effectively distinguishing different sensor ranges. The transition points can be stored in an EEPROM fabricated to suit ASIC applications.
    Type: Application
    Filed: August 22, 2007
    Publication date: February 26, 2009
    Inventor: Richard A. Wade
  • Publication number: 20080282766
    Abstract: An electromagnetic flowmeter for giving a magnetic field to a measurement fluid, detecting an electric signal occurring in the measurement fluid according to the magnetic field, and computing a flow quantity value based on the electric signal includes a zero point measurement section for measuring a zero point of the measurement fluid; a storage section for storing the measured zero point measurement value; a determination section for determining whether or not the difference between the preceding zero point measurement value stored in the storage section and the present zero point measurement value is beyond a predetermined value range; and at least either a transmission section for transmitting the determination result or a display section for displaying the determination result when the determination section determines that the difference is beyond the predetermined value range.
    Type: Application
    Filed: March 10, 2008
    Publication date: November 20, 2008
    Applicant: Yokogawa Electric Corporation
    Inventors: Ikuhiko Ishikawa, Yasumi Koike, Toru Shimura
  • Publication number: 20080236241
    Abstract: In a travel angle detection system for a mobile object having a detector installed in the mobile object to produce angular velocity outputs successively, the detector outputs are read and one output is determined as a provisional calibration value indicative of zero-point. Integrated values of differences between the calibration value and successive outputs and output variation width are calculated. When they are within predetermined permissible ranges, the mobile object is determined to be in static condition and the calibration value is corrected by an average value of the integrated values. The travel angle of the mobile object is detected from the calibrated outputs of the detector, thereby achieving accurate calibration of detector output by enabling accurate determination of the static condition.
    Type: Application
    Filed: December 19, 2007
    Publication date: October 2, 2008
    Inventor: Mitsuyasu Ino
  • Publication number: 20080140331
    Abstract: A method of calibrating an individual sensor whose output varies with at least one operating condition. A generic calibration curve is produced for the variation of the sensor reading with the at least one operating condition for the particular sensor type of the individual sensor. Calibration readings are then taken for the individual sensor at just a small number of discrete values for the at least one operating condition which fall within the full range of operating values for the at least one operating condition for which the sensor is to be calibrated. Using the calibration readings, the generic calibration curve is then scaled in order to fit the generic curve to the individual sensor.
    Type: Application
    Filed: February 22, 2008
    Publication date: June 12, 2008
    Inventor: VICTOR ALEXANDROVICH KALININ
  • Publication number: 20080110236
    Abstract: A method and system for calibrating an analog sensor used in a digital measurement system is provided. The design comprises generating a precise pressure value set at multiple calibration points and supplying said precise pressure value set to an uncalibrated pressure sensor, detecting sensor changes for the uncalibrated pressure sensor based on each precise pressure value generated, polling an actual pressure reading associated with a sensor change for the uncalibrated pressure sensor for each calibration point, and establishing a mathematical relationship between measured value readings and actual pressure for the uncalibrated sensor. Establishing the mathematical relationship converts the uncalibrated sensor to a newly calibrated sensor. A known good sensor may be employed to enhance calibration reliability.
    Type: Application
    Filed: November 9, 2006
    Publication date: May 15, 2008
    Applicant: Advanced Medical Optics, Inc.
    Inventors: Abraham Hajishah, David King, Michael J. Claus
  • Patent number: 7213439
    Abstract: A thermally controlled stage is connected within one arm of a bridge of a capillary bridge viscometer so that the bridge can be balanced in situ to provide accurate measurement signals. The thermally controlled stage includes a tuning capillary tubing portion that is wrapped around a thermally conductive core. A resistance heater or a Peltier thermoelectric device is located in close proximity to the capillary tubing portion. The heater or Peltier device and the capillary tubing portion are located within a thermally insulated housing. The heater or Peltier device varies the temperature of the capillary tubing portion to cause a corresponding change in the flow impedance of the tuning capillary tubing portion of the arm of the bridge in which the thermally controlled stage is connected. The temperature of the tuning capillary tubing portion is monitored and adjusted until any pressure differential across the bridge is eliminated, whereby to trim in the balance of the bridge.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: May 8, 2007
    Assignee: Wyatt Technology Corporation
    Inventor: Steven P. Trainoff
  • Patent number: 7184910
    Abstract: A method of compensating sensor data and a method of evaluating an interlock of an interlock system, in which an allowable variation between sensors varying depending on a driving time for a set of equipment, an RF time, the number of wafers, etc. is minimized, thereby enhancing detection reliability of a defective wafer.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: February 27, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seung-jun Lee, Hak-yong Kim, Yoo-seok Jang, Chang-hun Park, Seung-Yong Doh
  • Patent number: 7174766
    Abstract: A self-calibrating carbon dioxide sensor that includes a carbon dioxide detector and a carbon dioxide gas generator. In some embodiments, the carbon dioxide gas generator includes a heating element and a carbon dioxide gas releasing solid material in thermal communication with the heating element. The carbon dioxide gas releasing solid material releases carbon dioxide when heated by the heating element. Methods of calibrating a self-calibrating carbon dioxide sensor are also disclosed.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: February 13, 2007
    Assignee: Honeywell International Inc.
    Inventors: Steven J. Eickhoff, Roland A. Wood
  • Patent number: 7124621
    Abstract: An acoustic flowmeter calibration method and sampling system address a variation in acoustic transducer delay time with increasing temperature. In one aspect, calibration of the path length between the sending and receiving transducers and calibration of the transducer delay time over a wide temperature range are optimized. In another aspect, the flowmeter output is temperature compensated based on the exhaust flowmeter gas temperature. These two aspects may be embodied in an ultrasonic flowmeter for exhaust gas measurement individually or in combination in accordance with the invention.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: October 24, 2006
    Assignee: Horiba Instruments, Inc.
    Inventor: Timothy A. Nevius
  • Patent number: 7117714
    Abstract: A device which includes an acceleration sensor for outputting small differential voltages VIP and VIN using resistance changes, and an output amplifier for amplifying the voltage difference. The output amplifier includes an offset-voltage adjustment circuit and an instrumentation amplifier. The instrumentation amplifier includes a first Op-amp having inputs connected to VIP and offset-voltage input terminals, a second Op-amp having inputs connected to VIN and VCOM input terminals, and a third Op-amp having inputs connected to outputs of the first and second Op-amps via resistors. The reference voltage VCOM of the instrumentation amplifier output is also applied to the second Op-amp.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: October 10, 2006
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Akira Nakayama
  • Patent number: 7114368
    Abstract: An apparatus for improving the procedure for quantifying the volume of liquid dispensed by a liquid-dispensing mechanism of an analytical instrument. The apparatus of this invention comprises (a) at least one weigh cup; (b) at least one standard mass; (c) at least one transducer assembly to convert a value of weight to an electrical response; and (d) at least one electronic circuit for converting the electrical response to a measurement of volume. This invention provides a method for calibrating readings of the volume of liquid dispensed by a liquid-dispensing mechanism of an analytical instruments so that absolute measurements of the volume of liquid dispensed can be obtained.
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: October 3, 2006
    Assignee: Abbott Laboratories
    Inventors: Kurt M. Klosterman, Ganesh Rajagopal, Larry R. Jibson, James L. Dempski, Paul A. Matuszewski, Jeffrey W. Stewart, Jeffrey R. Swanson, David M. Tipotsch, Randall E. Youngs, Noman A. Abunimeh
  • Patent number: 7082830
    Abstract: A physical quantity sensor detecting physical quantity, such as acceleration or angular velocity, is provided and mounted on, for example, a vehicle. The sensor has a physical quantity transducer and the first to third circuits. The transducer senses physical quantity acting in a direction determined with respect to a predetermined detection axis of the transducer to output a detection signal corresponding in level to the physical quantity. The first circuit receives the detection signal and output a first physical quantity signal depending in level on the detection signal. The second circuit produces a second physical quantity signal from the first physical quantity signal, the second physical quantity signal being larger in magnitude the first physical quantity signal. The third circuit receives the first and second physical quantity signals and outputs a signal consisting of the first and second physical quantity signals alternately selected and lined up sequentially in time.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: August 1, 2006
    Assignee: Denso Corporation
    Inventors: Tomohito Kunda, Yasuki Shimoyama
  • Patent number: 7062950
    Abstract: A measurement device with a cylindrical housing (2), with a sensor element and with an adjustment element (6) made, for example, as a potentiometer, for setting at least one parameter of the measurement device. The measurement device (1) is especially easily and still accurately and reproducibly settable by there being at least one rotary adjustment ring, the adjustment ring being made as a housing sleeve (7) for setting the parameter.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: June 20, 2006
    Assignee: i f m electronic GmbH
    Inventor: Benno Kathan
  • Patent number: 7043961
    Abstract: A standard medical or surgical tool's axis is located by attaching to the tool a plurality of a location indicating elements or markers having a known geometric or spatial relationship, and placing the tool in a tool calibrator that supports the tool in a manner that allows tools of different diameters to be rotated while maintaining the tool's axis in a fixed or stable orientation. As the tool is rotated, a marker locating system tracks the positions of the markers on the tool and then extrapolates or determines the axis of rotation with respect to the markers clamped to the tool. The tool calibrator has a second set of position indicating elements or markers with fixed geometric or spatial relationship with one another and with respect to a stop, against which the end or tip of the tool is placed.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: May 16, 2006
    Assignee: Z-Kat, Inc.
    Inventors: Rajesh Pandey, Louis Arata, Brandon Larocque
  • Patent number: 7034495
    Abstract: An output port open control device (65) allows a port (P3) which outputs PWM signals of a Cos+ side to be in a high impedance state in a period in which respective PWM signals of Cos+ and Cos? supplied to a S-phase coil (22) of a stepping motor (2) are in a ground level, induced voltage corresponding to a magnetic flux variation caused in accordance with rotation of a magnet rotor (23) is generated in the S-phase coil (22), a voltage comparator (72) compares the induced voltage with a previously set threshold value and outputs presence or absence of the induced voltage, and a zero-reset judging device (66) determines that a pointer (4) is in the middle of rotation when the induced voltage is detected, and determines that the pointer (4) is in contact with a stopper mechanism (5) when it is not detected.
    Type: Grant
    Filed: October 28, 2004
    Date of Patent: April 25, 2006
    Assignee: Calsonic Kansei Corporation
    Inventor: Kiyoshi Sasaki
  • Patent number: 7034496
    Abstract: A method of correcting a pointing position of a pointer rotated by a stepper motor includes the steps of: performing a prereset operation in which the pointer is rotated to a reset operation starting position that represents a pointing position of the pointer which is shifted by a predetermined amount in a plus direction of a scale from a reset position where a pin which is rotated in conjunction with a rotation of the pointer abuts against a fixed stopper; after the prereset operation, performing a reset operation in which the pointer is rotated in a minus direction of the scale to the reset position; and after the reset operation, performing a correcting operation in which the pointer is rotated in the plus direction up to a reference pointing position which is indicated by previously stored reference pointing positional information.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: April 25, 2006
    Assignee: Yazaki Corporation
    Inventor: Masaki Oishi
  • Patent number: 7028467
    Abstract: An engine exhaust emission control device determines a differential pressure across a diesel particulate filter (DPF) to enable regeneration of the DPF at optimal timing. An ECU estimates the temperature of a differential pressure sensor provided for the DPF from the output of an intake air temperature sensor when the engine is not running, and determines an offset correction factor for correcting the sensor's offset error. The factor is set using the sensor output at this time as sensor's offset error, and stored in a memory. When detecting the differential pressure across the DPF, the temperature of the sensor at this time is estimated, and an offset correction factor that corresponds to this estimated temperature is selected. The sensor outputs are adjusted with this offset correction factor.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: April 18, 2006
    Assignee: DENSO Corporation
    Inventors: Tsukasa Kuboshima, Shinichiro Okugawa, Hironobu Baba
  • Patent number: 7006938
    Abstract: Reactive sensors typically exhibit nonlinear response to temperature variation. Systems and methods are disclosed for compensating for the nonlinear and/or temperature dependent behavior of reactive sensors and for calibrating the post-compensation output signals relative to known samples of the physical parameter under measure. One call of embodiments includes a housing containing at least part of a reactive sensor, a monolithic integrated circuit and a timing reference. The integrated circuit includes a waveform generator for generating a sensor exciting signal, a detector for detecting the response of the sensor to the combination of the exciting signal and the under-measure physical parameter, a temperature compensating unit and the Pade Approximant nonlinearity compensating unit are tuned by use of digitally programmed coefficients. The coefficients calibrate the final output as well as compensating for nonlinearity and temperature sensitivity.
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: February 28, 2006
    Assignees: AMI Semiconductor, Inc., Matsushita Electric Works, Ltd.
    Inventors: Jose Marcos Laraia, Masahisa Niwa, Robert P. Moehrke, Jose G. Taveira
  • Patent number: 6956351
    Abstract: A driving device, includes a stepping motor having an exciting coil and a rotor; a driven member driven in accordance with a rotation of the rotor; a stopper mechanically stopping the driven member at a zero position; a controller controlling the state of excitation of the exciting coil; an induced voltage detector detecting an induced voltage generated by a change of magnetic flux according to the rotation of the rotor; and a zero position detector detecting a stoppage of the driven member at the zero position. The controller supplies an exciting pattern to the exciting coil at the time of processing of zero position detection. The exciting pattern includes a first exciting step for detecting the induced voltage and a second exciting step for rotation. Total periods of the first exciting step is greater than that of the second exciting step during an electrical angle 90° in the one cycle.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: October 18, 2005
    Assignee: Yazaki Corporation
    Inventor: Yoshihisa Yamada
  • Patent number: 6918282
    Abstract: A test circuit and method provide testing of a capacitive type microsensor. The method includes applying a first signal having a first voltage potential to an input of a microsensor during a non-test operating mode. The method also includes applying a second voltage signal having a second voltage potential different than the first voltage potential during a test mode. The second voltage potential induces a net differential electrostatic force in the microsensor. The method further includes the steps of monitoring an output signal of the microsensor, comparing the output signal to an expected value when the microsensor is in the test mode, and determining if the microsensor is functioning properly as a function of the comparison.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: July 19, 2005
    Assignee: Delphi Technologies, Inc.
    Inventor: Seyed R. Zarabadi
  • Patent number: 6826490
    Abstract: A transducer calibration apparatus and method for transforming both previously established transducer parameters for a transducer calibrated to a first target object material and measured transducer parameters for the transducer monitoring a second different target object material into a calibration parameter and transforming the output of the transducer and thus, the use of the transducer, from the first target object material used to calibrate the transducer to the second different target object material being subsequently monitored by the transducer by linearizing the output of the transducer into gap values as a function of the calculated calibration parameter and then, generating alarms based on the linearized output of the transducer exceeding established limits and using the alarms to automatically shut down a machine being monitored by the transducer and/or automatically annunciate machine problems to personnel.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: November 30, 2004
    Assignee: Bentley Nevada, LLC
    Inventors: Roger A. Hala, Ingrid M. Foster