With Thermal Lag Compensation Patents (Class 374/169)
  • Patent number: 9995223
    Abstract: A fuel control device and method of a gas turbine combustor, for advanced humid air turbines, in which plural combustion units comprising plural fuel nozzles for supplying fuel and plural air nozzles for supplying air for combustion are provided. A part of the plural combustion units are more excellent in flame stabilizing performance than the other combustion units. A fuel ratio, at which fuel is fed to the part of the combustion units is set on the basis of internal temperature of the humidification tower and internal pressure of the humidification tower to control a flow ratio of the fuel fed to the plural combustion units.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: June 12, 2018
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Kazuki Abe, Tomomi Koganezawa
  • Patent number: 9973074
    Abstract: A conventional power supply device has a problem in miniaturization. A power supply device generates a prediction value of an error signal from first and second error signals, and controls an output voltage so that the prediction value lies between first and second threshold values. The first error signal is obtained by converting an error voltage based on the difference between the output voltage and a reference voltage at a first timing. The second error signal is obtained by converting an error voltage based on the difference between the output voltage and the reference voltage at a second timing.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: May 15, 2018
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Ming Liu, Tatsuo Nakagawa, Kenichi Osada
  • Patent number: 9797794
    Abstract: Providing a fast response to a process step while allowing a sensor response to remain relatively slow. A mechanical component generates a response to a step change in a physical property and an electrical component generates an analog electrical signal indicative of the response generated by the mechanical component over a period of time. The analog electrical signal is converted into digital values and the digital values are used to indicate the final value of the step change in the physical property before the period of time has elapsed.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: October 24, 2017
    Assignee: Invensys Systems, Inc.
    Inventor: William M. Slechta
  • Patent number: 9217673
    Abstract: There is provided a high responsivity device for thermal sensing in a Terahertz (THz) radiation detector. A load impedance connected to an antenna heats up due to the incident THz radiation received by the antenna. The heat generated by the load impedance is sensed by a thermal sensor such as a transistor. To increase the responsivity of the sense device without increasing the thermal mass, the device is located underneath a straight portion of an antenna arm. The transistor runs substantially the entire length of the antenna arm alleviating the problem caused by placing large devices on the side of the antenna and the resulting large additional thermal mass that must be heated. This boosts the responsivity of the pixel while retaining an acceptable level of noise and demanding a dramatically smaller increase in the thermal time constant.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: December 22, 2015
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Dan Corcos, Danny Elad, Noam Kaminski, Bernhard Klein, Lukas Kull, Thomas Morf
  • Patent number: 8602643
    Abstract: A method and apparatus is presented for obtaining of accurate measurements of the temperature of a thermocouple and high fidelity measurements of the rate of change of the temperature of a thermocouple. A first sub-circuit is connected to the thermocouple with two conductors made of two different thermocouple alloys which are substantially the same as the alloys used in the construction of the thermocouple. A second sub-circuit is connected to the thermocouple with two conductors made of substantially identical material, such as copper. The first sub-circuit provides an accurate measurement of the temperature of the thermocouple. The second sub-circuit provides a high fidelity measurement of the rate of change of the temperature of the thermocouple.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: December 10, 2013
    Inventor: David Phillip Gardiner
  • Patent number: 8475038
    Abstract: Described is a method and apparatus for compensating for a change in an output characteristic of a temperature sensor due to varying temperature. The temperature sensor includes a temperature sensing core, an analog-to-digital converter, a counter, and a temperature compensating circuit. The temperature sensing core generates a sense voltage corresponding to a sensed temperature. The analog-to-digital converter converts the sense voltage into a digital signal and generates a conversion signal. The temperature compensating circuit generates a counter clock signal that varies according to a temperature change. The counter counts the number of pulses of the counter clock signal according to the conversion signal.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: July 2, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hyung-seuk Kim
  • Patent number: 8308359
    Abstract: An apparatus including a temperature-sensing circuit. The temperature-sensing circuit can include an amplifier. The amplifier can include a positive input and a negative input. The negative input can be configured to be driven by a temperature-independent signal. A first transistor electrically can be connected to the positive input. The first transistor can be configured to be controlled by a temperature signal. A temperature threshold resistance and a hysteresis resistance can be electrically connected in series to the positive input. A second transistor can be electrically connected in parallel with the hysteresis resistance.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: November 13, 2012
    Assignee: Intellectual Ventures Holding 83 LLC
    Inventor: Darryl G. Walker
  • Patent number: 8197132
    Abstract: An electronic thermometer is configured for selectable predictive modes based upon the same predictive algorithm. A mode selector is adapted for user selection between several modes of operation of the thermometer. Each mode of operation utilizes the same predictive algorithm for estimating the temperature of the subject before the thermometer reaches full equilibrium. Different modes offer users a selection for striking the appropriate balance between response time and precision, based upon user preferences and needs.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: June 12, 2012
    Assignee: Covidien AG
    Inventors: Michael E. Bisch, Joseph T. Gierer
  • Patent number: 8136983
    Abstract: A system is disclosed that essentially eliminates the delay in measurement of temperature by a sensor due to exponential response of the sensor. The system finds the rate of change of the sensor signal, multiplies it by the time constant of the sensor signal and adds the result to the instantaneous value of the sensor signal to predict the final value of the sensor signal or the actual value of the temperature. When the sensor is permanently attached to an object, the final temperature of the object is predicted in a similar manner using the combined time constant value of the sensor and the object. The system can be software, analog hardware or digital hardware. The system also allows more accurate temperature control without undershoot or overshoot by providing a control signal proportional to the difference between a desired value and the predicted final value of the sensor signal. The system similarly eliminates the time delay in measurement and control of flow in thermal flow meters.
    Type: Grant
    Filed: January 1, 2009
    Date of Patent: March 20, 2012
    Inventor: Mahmoud Razzaghi
  • Patent number: 8025438
    Abstract: An electronic clinical thermometer having a low frequency of errors can be implemented. The electronic clinical thermometer for predicting an equilibrium temperature based on a temporal change in the actual measurement value of a temperature at a measurement target detected by a temperature detection element includes an abnormal change detection unit which detects an abnormal change of an actual measurement value from the temperature detection element, and a control unit which controls the start timing of a temporal change in actual measurement value used for derivation of a prediction value when the abnormal change detection unit detects an abnormality.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: September 27, 2011
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Kouji Nakamura, Makoto Ikeda
  • Patent number: 7654736
    Abstract: A semiconductor device that may include temperature sensing circuits is disclosed. The temperature sensing circuits may be used to control various parameters, such as internal regulated supply voltages, internal refresh frequency, a word line low voltage, or the like. In this way, operating specifications of a semiconductor device at worst case temperatures may be met without compromising performance at normal operating temperatures. Each temperature sensing circuit may include a selectable temperature threshold value as well as a selectable temperature hysteresis value. In this way, temperature performance characteristics may be finely tuned. Furthermore, a method of testing the temperature sensing circuits is disclosed in which a current value may be monitored and temperature threshold values and temperature hysteresis values may be thereby determined.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: February 2, 2010
    Inventor: Darryl Walker
  • Patent number: 7641390
    Abstract: A method for digitally controlling the resistive output of a temperature probe is disclosed. The system is comprised of a temperature sensor, a processor and a means under the control of the processor for modifying the resistive output such as a digital potentiometer. In one embodiment, the processor reads the temperature sensor and adjusts the potentiometer based on a correlative or predictive technique so as to provide a modified output that matches that of a standard resistive temperature probe and is compatible for display on a multi-parameter monitor.
    Type: Grant
    Filed: April 12, 2008
    Date of Patent: January 5, 2010
    Assignee: YSIS Incorporated
    Inventors: Jack P. Shidemantle, Robert A. Kill
  • Patent number: 7637657
    Abstract: An electronic thermometer includes a temperature sensing means for sensing a temperature of a part to be measured, and a prediction means for calculating an equilibrium temperature according to the temperature being sensed. The prediction means includes a parameter determination unit for calculating parameters of a prediction function having three parameters to obtain an equilibrium predicted temperature, and an equilibrium predicted temperature calculation means for calculating an equilibrium temperature during a period of the thermal equilibrium time, based on the parameters determined by the parameter determination unit. The parameter determination unit determines parameters held by the prediction function, based on three (or two) sensed temperatures and the measuring times thereof.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: December 29, 2009
    Assignee: Citizen Holdings Co., Ltd.
    Inventors: Tetsuya Yamamoto, Isamu Kobayashi
  • Publication number: 20090074029
    Abstract: An electronic thermometer includes a temperature sensing means for sensing a temperature of a part to be measured, and a prediction means for calculating an equilibrium temperature according to the temperature being sensed. The prediction means includes a parameter determination unit for calculating parameters of a prediction function having three parameters to obtain an equilibrium predicted temperature, and an equilibrium predicted temperature calculation means for calculating an equilibrium temperature during a period of the thermal equilibrium time, based on the parameters determined by the parameter determination unit. The parameter determination unit determines parameters held by the prediction function, based on three (or two) sensed temperatures and the measuring times thereof.
    Type: Application
    Filed: March 14, 2006
    Publication date: March 19, 2009
    Applicant: CITIZEN HOLDINGS CO., LTD.
    Inventors: Tetsuya Yamamoto, Isamu Kobayashi
  • Publication number: 20080177496
    Abstract: An electronic clinical thermometer capable of high-precision measurement within a shorter period of time. The electronic clinical thermometer for predicting an equilibrium temperature based on a temporal change in actual measurement value of a measurement target temperature detected by a temperature detection element includes a prediction value derivation unit which derives a plurality of prediction values from actual measurement values in accordance with a plurality of prediction equations, a selection unit which selects one of the plurality of prediction equations based on the selected prediction equation, and a display output which displays a prediction value result based on the selected prediction equation.
    Type: Application
    Filed: January 11, 2008
    Publication date: July 24, 2008
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Kouji Nakamura, Makoto Ikeda
  • Publication number: 20080175302
    Abstract: An electronic clinical thermometer having a low frequency of errors can be implemented. The electronic clinical thermometer for predicting an equilibrium temperature based on a temporal change in the actual measurement value of a temperature at a measurement target detected by a temperature detection element includes an abnormal change detection unit which detects an abnormal change of an actual measurement value from the temperature detection element, and a control unit which controls the start timing of a temporal change in actual measurement value used for derivation of a prediction value when the abnormal change detection unit detects an abnormality.
    Type: Application
    Filed: January 11, 2008
    Publication date: July 24, 2008
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Kouji Nakamura, Makoto Ikeda
  • Patent number: 7318004
    Abstract: A thermometer system and method that rapidly predict body temperature based on the temperature signals received from a temperature sensing probe when it comes into contact with the body. A nonlinear, multi-parameter curve fitting process is performed and depending on the errors in the curve fit, parameters are changed or a prediction of the temperature is made. Criteria exist for the differences between the curve fit and the temperature data. The processor switches to a Continuous Monitor State if the curve fit over a limited number of time frames is unacceptable. Determining the start time on which the measurement time frame for prediction is based is performed by tissue contact threshold coupled with a prediction time delay.
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: January 8, 2008
    Assignee: Cardinal Health 303, Inc.
    Inventor: Robert D. Butterfield
  • Patent number: 7315792
    Abstract: A temperature detector and method of detecting a shifted temperature provides multiple detected temperature points using a single branch. The temperature detector generates multiple detected temperature points in response to temperature control signals sequentially generated in a single branch. Since a shifted temperature for the single branch is found and a trimming operation in response to the shifted temperature is carried out, the test time is reduced. Various refresh periods can be set in response to various trip point temperatures and thus power consumption of a DRAM can be decreased.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: January 1, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-sun Min, Nam-jong Kim
  • Patent number: 7155897
    Abstract: A combustion temperature high speed detection device is provided with a phase lead processing portion, thereby canceling out a detection lag of a temperature detector, and detecting the combustion gas temperature of a combustor at a high speed. The combustion temperature high speed detection device is also provided with a first-order lag filtering portion with a time constant of 0.25 second, a phase lag processing portion with a time constant of 10 seconds, a temperature change filtering portion with a cutoff frequency of 2 to 3 Hz, and a disturbance filtering portion including first-order lag filtering portions with different time constants and a high value selecting portion. Thus, high speed detection of the combustion gas temperature more suitable for a gas turbine system can be performed.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: January 2, 2007
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Shinsuke Nakamura, Fuminori Fujii, Shinya Uchida, Kozo Toyama, Hitoi Ono
  • Patent number: 7109680
    Abstract: An object is to provide an inverter device capable of realizing exact protection of the winding of a motor. An inverter device for generating a pseudo alternating current by switching a direct current to drive a motor, comprises a controller that executes vector control on the basis of a secondary current applied to the motor. The controller calculates a current density from the secondary current to execute a predetermined protection operation on the basis of the calculated current density. The controller imposes a restriction on the operation frequency of the motor on the basis of the current density.
    Type: Grant
    Filed: February 2, 2005
    Date of Patent: September 19, 2006
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Mamoru Kubo, Kenji Nojima
  • Patent number: 6938493
    Abstract: A heat loss gauge for measuring gas pressure in an environment includes a resistive sensing element and a resistive compensating element. The resistive compensating element is in circuit with the sensing element and is exposed to a substantially matching environment. An electrical source is connected to the sensing element and the compensating element for applying current through the elements. The current through the sensing element is substantially greater than the current through the compensating element. Measuring circuitry is connected to the sensing element and the compensating element for determining gas pressure in the environment to which the sensing element and compensating element are exposed based on electrical response of the sensing element and the compensating element.
    Type: Grant
    Filed: October 16, 2002
    Date of Patent: September 6, 2005
    Assignee: Helix Technology Corporation
    Inventors: Daniel G. Bills, Michael D. Borenstein
  • Patent number: 6886978
    Abstract: An electronic clinical thermometer has a probe including a variable-temperature heater and one or more temperature sensors and may also include a heat flux sensor. Physical variables such as temperature, time rate of change in temperature and/or heat flow rate are directly measured at positions on the surface of a patient while being heated by the heater through a thermally insulating member. Such measured values are used to solve a heat transfer equation rewritten as lower-order equations. Measurements may be controlled to be taken at a desired timing such as at specified intervals. The probe for contacting the patient's body may be planar or in an elongated bar-shape.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: May 3, 2005
    Assignee: OMRON Corporation
    Inventors: Muneo Tokita, Satoshi Nakajima, Shigeru Makita
  • Patent number: 6865952
    Abstract: A heat loss gauge for measuring gas pressure in an environment includes a resistive sensing element and a resistive compensating element. The resistive compensating element is in circuit with the sensing element and is exposed to a substantially matching environment. An electrical source is connected to the sensing element and the compensating element for applying current through the elements. The current through the sensing element is substantially greater than the current through the compensating element. Measuring circuitry is connected to the sensing element and the compensating element for determining gas pressure in the environment to which the sensing element and compensating element are exposed based on electrical response of the sensing element and the compensating element.
    Type: Grant
    Filed: May 24, 2004
    Date of Patent: March 15, 2005
    Assignee: Helix Technology Corporation
    Inventors: Daniel G. Bills, Michael D. Borenstein
  • Patent number: 6854881
    Abstract: In accordance with the presence or absence of heat, a transistor shows a relatively rapid change, while a cooling water CLW shows a relatively gentle change. The temperatures of both members settle down to approximately equal temperatures when no heat is generated in the transistor. At this time, the temperature of one of the transistor or the cooling water and the amount of energization of the transistor are used to estimate the temperature of the other member. This method is applied to other temperature estimations, such as estimation of the temperature between a stator coil and a stator iron core of a motor etc.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: February 15, 2005
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Mitsuhiro Nada
  • Patent number: 6698921
    Abstract: A method and device for rapidly predicting the temperature of an object through a sensor reading of the object's temperature by using a processor comprising finite impulse response (FIR) filters to determine the average value, the first derivative, and the second derivative of the sensed temperature based upon a predetermined number of temperature samples, apply a respective weighting factor to each of the average value, the first derivative, and the second derivative respectively, and calculate a temperature estimate by combining the weighted average value, the first derivative, and second derivative together with an offset factor.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: March 2, 2004
    Assignee: Alaris Medical Systems, Inc.
    Inventor: Robert J. Siefert
  • Patent number: 6695471
    Abstract: A temperature meter for measuring temperature of a measurement target object to which a temperature sensor cannot be fixed directly is formed by a temperature sensor configured to measure an observed temperature in a vicinity of the measurement target object; a timer configured to measure a temperature observation time; and a calculation processor configured to calculate the temperature of the measurement target object according to the observed temperature and the temperature observation time by carrying out a prescribed calculation processing.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: February 24, 2004
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Etsu Hashimoto, Yoshitada Katagiri, Tetsuo Abe, Yoshio Suzuki
  • Patent number: 6522990
    Abstract: Methods and apparatus for reducing temperature overshoot in an engine, such as in a gas turbine aircraft engine, are described. In an exemplary embodiment, an unmeasured temperature to be regulated in an engine is determined by measuring a temperature in the engine wherein the measured temperature being related to the unmeasured temperature, determining a bias of the measured temperature wherein the bias being an amount estimated to be a difference between the measured temperature and a steady state measured temperature and adding the bias to the measured temperature to restore the relationship between measured and unmeasured temperature so that the unmeasured temperature may be properly regulated. The bias is determined using a heat transfer model.
    Type: Grant
    Filed: December 3, 1999
    Date of Patent: February 18, 2003
    Assignee: General Electric Company
    Inventors: Mark A. Rains, Sean P. Harper
  • Publication number: 20020191675
    Abstract: An electronic clinical thermometer has a probe including a variable-temperature heater and one or more temperature sensors and may also include a heat flux sensor. Physical variables such as temperature, time rate of change in temperature and/or heat flow rate are directly measured at positions on the surface of a patient while being heated by the heater through a thermally insulating member. Such measured values are used to solve a heat transfer equation rewritten as lower-order equations. Measurements may be controlled to be taken at a desired timing such as at specified intervals. The probe for contacting the patient's body may be planar or in an elongated bar-shape.
    Type: Application
    Filed: June 5, 2002
    Publication date: December 19, 2002
    Applicant: OMRON Corporation
    Inventors: Muneo Tokita, Satoshi Nakajima, Shigeru Makita
  • Patent number: 6471398
    Abstract: A temperature management apparatus for foodstuffs stored in a storage cabinet, wherein a temperature sensor is placed in the storage cabinet to detect an inside temperature of the cabinet thereby to calculate an ambient temperature of the foodstuffs based on the detected inside temperature, and wherein an internal temperature of the foodstuffs is presumed on a basis of the calculated ambient temperature. The temperature management apparatus is provided with a foodstuff temperature indicator for indicating the presumed internal temperature of the foodstuffs and an alarm device for issuing an alarm sound when the presumed internal temperature of the foodstuffs becomes lower than a lower limit temperature or higher than an upper limit temperature.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: October 29, 2002
    Assignee: Hoshizaki Denki Kabushiki Kaisha
    Inventor: Yoshiyuki Ukai
  • Patent number: 6439768
    Abstract: A thermometer having a symmetrical probe with a sensor for sensing temperatures and a processor, a method for calculating temperature of an object by a second-order differential equation comprises the steps of obtaining temperatures from object, performing a first temperature calculation to obtain an initial prediction of temperature of object, adding a compensation coefficient, generating a compensated temperature based on a combination of initial prediction of temperature of object and compensated coefficient, and calculating a stabilized prediction of temperature of object based on compensated temperature before sensor has reached temperature of object. This thermometer can effectively decreasing error during heat transfer process.
    Type: Grant
    Filed: December 27, 1999
    Date of Patent: August 27, 2002
    Assignee: Taidoc Corp. Ltd.
    Inventors: Shu-Mei Wu, Tung-Chuang Jan, Chao-Wang Chen
  • Publication number: 20020075936
    Abstract: A test wafer for use in temperature prediction is prepared. The test wafer includes: first semiconductor layer formed in a crystalline state; second semiconductor layer formed in an amorphous state on the first semiconductor layer; and passivation film formed over the second semiconductor layer. Next, the test wafer is loaded into a device fabrication system and then heated therein at a predetermined period of time. Thereafter, a recovery rate, at which part of the second semiconductor layer recovers from the amorphous state to the crystalline state at the interface with the first semiconductor layer, is calculated. Then, a temperature of the test wafer that has been heated is measured according to a relationship between the recovery rate and a temperature corresponding to the recovery rate.
    Type: Application
    Filed: October 31, 2001
    Publication date: June 20, 2002
    Inventors: Satoshi Shibata, Yuko Nambu
  • Publication number: 20020039379
    Abstract: A temperature management apparatus for foodstuffs stored in a storage cabinet, wherein a temperature sensor is placed in the storage cabinet to detect an inside temperature of the cabinet thereby to calculate an ambient temperature of the foodstuffs based on the detected inside temperature, and wherein an internal temperature of the foodstuffs is presumed on a basis of the calculated ambient temperature. The temperature management apparatus is provided with a foodstuff temperature indicator for indicating the presumed internal temperature of the foodstuffs and an alarm device for issuing an alarm sound when the presumed internal temperature of the foodstuffs becomes lower than a lower limit temperature or higher than an upper limit temperature.
    Type: Application
    Filed: May 10, 1999
    Publication date: April 4, 2002
    Inventor: YOSHIYUKI UKAI
  • Patent number: 6357911
    Abstract: In the processing of an item, particularly a food item, where the final equalized temperature is important to the processing a method and apparatus for predicting the equalized temperature is disclosed. A series of infrared sensors is used to measure the rate of change of the surface temperature of an item after the item is exposed to a known thermal shock such as heating or cooling. The predicted equalized temperature can be calculated from the series of surface temperatures using least squares, non-linear regression techniques. One means for applying a thermal shock to an item would be the use of cryogens such as liquid nitrogen, carbon dixoide snow or synthetic liquid air (SLA).
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: March 19, 2002
    Assignee: The BOC Group, Inc.
    Inventors: Michele L Groen, Mark T. Grace, David G. Wardle
  • Publication number: 20020006154
    Abstract: In accordance with the presence or absence of heat, a transistor shows a relatively rapid change, while a cooling water CLW shows a relatively gentle change. The temperatures of both members settle down to approximately equal temperatures when no heat is generated in the transistor. At this time, the temperature of one of the transistor or the cooling water and the amount of energization of the transistor are used to estimate the temperature of the other member. This method is applied to other temperature estimations, such as estimation of the temperature between a stator coil and a stator iron core of a motor etc.
    Type: Application
    Filed: May 9, 2001
    Publication date: January 17, 2002
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Mitsuhiro Nada
  • Publication number: 20020003832
    Abstract: A method and device for rapidly predicting the temperature of an object through a sensor reading of the object's temperature by using a processor comprising finite impulse response (FIR) filters to determine the average value, the first derivative, and the second derivative of the sensed temperature based upon a predetermined number of temperature samples, apply a respective weighting factor to each of the average value, the first derivative, and the second derivative respectively, and calculate a temperature estimate by combining the weighted average value, the first derivative, and second derivative together with an offset factor.
    Type: Application
    Filed: March 14, 2001
    Publication date: January 10, 2002
    Inventor: Robert J. Siefert
  • Patent number: 6283628
    Abstract: An intelligent input/output (I/O) temperature sensor includes a temperature sensing element which generates a plurality of digital data indicative of the temperature at the temperature sensing element, a processor directly coupled to the temperature sensing element which generates a plurality of compensated digital data from respective the digital data and a digital delta value, and a memory directly coupled to the processor which stores the digital delta value and the compensated digital data. According to one aspect of the invention, the memory is an electrically erasable programmable read only memory (EEPROM). According to another aspect of the invention, the memory, the temperature sensing element and the processor are all disposed within a unified structure, i.e., on a single chip. A method for calibrating an intelligent input/output (I/O) temperature sensor is also described.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: September 4, 2001
    Assignee: Airpax Corporation, LLC
    Inventor: Shaun Goodwin
  • Patent number: 6146015
    Abstract: A digital thermometer, having a sensing tip that is integral with a heater, a display, and a microcontroller which samples for rise time and proportionally operates the heater to increase the temperature of the sensing tip in an alternating control sequence that includes a post-heating delay and, thus, the sensing tip quickly arrives at a stable temperature when no further heating is required.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: November 14, 2000
    Assignee: Micro Weiss Electronics
    Inventor: John Weiss
  • Patent number: 6109784
    Abstract: A digital thermometer, having a sensing tip that is integral with a heater, a display, and a microcontroller which samples for rise time and proportionally operates the heater to increase the temperature of the sensing tip in an alternating control sequence that includes a post-heating delay and, thus, the sensing tip quickly arrives at a stable temperature when no further heating is required.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: August 29, 2000
    Assignee: Micro Weiss Electronics
    Inventor: John Weiss
  • Patent number: 6059452
    Abstract: A quick registering thermometer utilizing a sensor that has electrical resistance varying with temperature located at the tip of a probe, the sensor having relatively small thermal mass and short thermal time constant. Within seconds of contact with the patient, the circuitry communicating with the sensor determines the rate of change in resistance of the sensor and, in turn, the temperature that the sensor would reach if allowed the length of time it would need to reach equilibrium with the contact surface of the patient. Based on the equilibrium temperature determined for the surface of the patient, the circuitry calculates and registers the core body temperature.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: May 9, 2000
    Assignee: RTD Technology, Inc.
    Inventors: Richard P. Smith, Ned M. Cole, Jr., Roger B. Whitaker, Dale R. Andrews
  • Patent number: 5725308
    Abstract: A quick registering thermometer utilizing a sensor that has electrical resistance varying with temperature located at the tip of a probe, the sensor having relatively small thermal mass and short thermal time constant. Within seconds of contact with the patient, the circuitry communicating with the sensor determines the rate of change in resistance of the sensor and, in turn, the temperature that the sensor would reach if allowed the length of time it would need to reach equilibrium with the contact surface of the patient. Based on the equilibrium temperature determined for the surface of the patient, the circuitry calculates and registers the core body temperature. Included in the circuitry is an error adjustment mechanism for changing the calculated temperature as a function of the number of displays of the thermometer in a given period of time.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: March 10, 1998
    Assignee: RTD Technology, Inc.
    Inventors: Richard P. Smith, Ned M. Cole, Jr., Roger B. Whitaker, Dale R. Andrews
  • Patent number: 5697552
    Abstract: A thermostat for heating or cooling, operative to maintain an indoor air temperature to a limited setpoint range, is provided with a comparison circuit to prevent tampering intended to exceed a setpoint limit. A first temperature sensor responds to ambient air temperature and can include a first thermistor. A second thermistor is partly thermally isolated from the air, and senses a reference temperature that lags temperature changes in the ambient air. The two thermistors form a voltage divider coupled to one input of a differential amplifier comparator, the other input of which is coupled to a fixed voltage reference. When the ambient and reference temperatures exceed a predetermined temperature difference, the differential amplifier operates a relay that breaks a circuit including the contacts. This occurs when locally cooling the ambient air to generate a spurious call for heat (or vice versa).
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: December 16, 1997
    Inventors: Thomas K. McHugh, Arthur L. Steadman, Jr.
  • Patent number: 5626783
    Abstract: A device and a method for compensating for temperature fluctuations for maintaining the warmth of a cooker having an inverter circuit, which has a system controller which obtains a final compensation data by processing a temperature compensation data outputted from a compensation temperature selection section and a present temperature detected by a temperature detecting section. The system controller outputs a driving signal to drive a bottom heater, a top heater, and a side heater of the cooker according to a calculated final compensation data.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: May 6, 1997
    Assignee: Goldstar Co., Ltd.
    Inventors: Chang W. Lee, Jong I. Park
  • Patent number: 5539381
    Abstract: A heat detector uses a single comparator operating in conjunction with a dynamically changing thermal reference that ensures quick response to rapid rates of thermal change and a fixed threshold that indicates an ambient temperature exceeds a threshold temperature. The inputs of the comparator receive different ones of the output signals of two thermal sensors. One thermal sensor responds nearly instantaneously to changes in ambient thermal conditions. The other thermal sensor is mounted on a printed circuit board operating as a heat sink and responds more slowly to changes in ambient thermal conditions. The difference between the thermal sensor output signals is zero at a lower ambient temperature when the rate of thermal change exceeds a preset amount and at a higher ambient temperature when the rate of thermal change is relatively slow.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: July 23, 1996
    Assignee: Sentrol, Inc.
    Inventor: Kirk R. Johnson
  • Patent number: 5473629
    Abstract: A predictive-type electronic clinical thermometer comprises a temperature sensing unit, a measuring unit for measuring elapsed time from the start of measurement and an arithmetic unit. The arithmetic unit performs a predictive operation in order to obtain a corrective value utilizing one selected prediction function at one time from among a plurality of prediction functions in which elapsed measurement time is a variable, each function defining a temperature change up to a final temperature. The arithmetic unit calculates the equilibrium temperature based upon the obtained corrective value and the sensed body temperature. In a case where an unstable temperature rise curve exhibits a transition not covered by the group of standard curves which are defined by the predictive functions, the prediction operation is suspended immediately and the actually measured temperature value is displayed at such time.
    Type: Grant
    Filed: November 30, 1993
    Date of Patent: December 5, 1995
    Assignee: Terumo Kabushiki Kaisha
    Inventor: Yutaka Muramoto
  • Patent number: 5392031
    Abstract: An electronic clinical thermometer which detects temperature of a measured part and determines equilibrium temperature by prediction calculation based on change of the detected temperature. One of classified temperature rise data groups is selected based on the change of the detected temperature and one of prediction equations and a set of prediction parameters are designated in accordance with the selected data group. The selected data group can be changed based on change of the detected temperature in a predetermined period after the selection of data group. Further, reliability of the measurement is judged based on the detected or predicted temperature and the predicted value can be corrected if the reliability is insufficient.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: February 21, 1995
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Makoto Toriumi, Makoto Ikeda
  • Patent number: 5333953
    Abstract: The present invention provides a method and apparatus for calculating thermal sensitivity and predicted mean thermal sensitivity felt by a person in an environment. According to the apparatus of the present invention, an air temperature Ta, a clothing thermal resistance Icl, and a sensor temperature Tcr of a sensor within the environment are provided as input to an input section of the apparatus. Upon receiving these values, a set temperature calculating section of the apparatus calculates a set temperature .theta..sub.(th). A thermal energy control means supplies thermal energy information H.theta..sub.(th) to a heater so as to heat the sensor in order to maintain the sensor temperature Tcr at the calculated set temperature .theta..sub.(th). An equivalent temperature calculating section then calculates an equivalent temperature Teq.sup.* so that a predicted mean thermal sensitivity PMV.sup.* can then calculated on the basis of the obtained equivalent temperature Teq.sup.*.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: August 2, 1994
    Assignee: Yamatake-Honeywell Co., Ltd.
    Inventor: Akihiko Kon
  • Patent number: 5240329
    Abstract: A method for detecting defects (10) in a workpiece (12) non-destructively, comprising subjecting the workpiece (12) to a temperature difference in relation to ambient temperature. The method provides an infrared radiometric scanner (14) having a field of view (16) which includes the workpiece (12) being tested, the radiometric scanner (14) sensing an emitted temperature pattern representative of the internal structure (10) of the workpiece (12). The method for detecting defects (10) also communicates a controller (18) with the radiometric scanner (14), the controller (18) receiving an output signal (22) from the radiometric scanner (14) indicative of the emitted temperature pattern before the workpiece (12) is allowed to achieve thermal equilibrium with the ambient environment.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: August 31, 1993
    Assignee: Ford Motor Company
    Inventor: Alexander J. Zinkosky
  • Patent number: 5080496
    Abstract: A method and apparatus are disclosed for providing a corrected temperature signal indicative of an actual temperature to be measured. In an exemplary embodiment for a gas turbine engine including a rotor having a plurality of blades for channeling a fluid, a first temperature sensor disposed downstream from the rotor blades for proving a measured temperature signal indicative of temperature of the fluid, and a speed sensor operatively joined to the rotor for providing a speed signal indicative of rotational speed of the rotor, a temperature prediction control system is provided. The control system includes means for modeling the rotor for providing a simulated first temperature signal indicative of temperature of the fluid at the first temperature sensor due to work between the fluid and the rotor blades upon rotation of the rotor at the rotor speed.
    Type: Grant
    Filed: June 25, 1990
    Date of Patent: January 14, 1992
    Assignee: General Electric Company
    Inventors: William J. Keim, Michael S. Idelchik
  • Patent number: 5066141
    Abstract: An electronic clinical thermometer of the present invention can maintain a high precision of prediction in a wider range of changes in temperature by storing a plurality of prediction methods and setting a prediction method for the equilibrium temperature in accordance with changes in detected temperature with the passage of time.
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: November 19, 1991
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Makoto Ikeda, Makoto Toriumi
  • Patent number: 5015102
    Abstract: A method and apparatus for measuring the temperature of a living body, providing a predetermined predictive functional formula in which the value of a shape parameter for reflecting the shape of a sensed temperature curve and the value of coefficient parameters for superimposing said prediction function on said sensed temperature curve are unknown. The temperature of a living body is sensed to obtain temperature data for subsequent processing, and elapsed time from start of temperature measurement is measured to obtain elapsed time data. The value of shape parameter is set on the basis of prescribed temperature data, and the value of coefficient parameters are set by solving simultaneous equations composed of a plurality of said predictive functional formula which includes said set value of shape parameter, and in which temperature data at a plurality of different points in time serve as purposive variables and functions of time data at the plurality of points in time serve as explicative variables.
    Type: Grant
    Filed: August 9, 1989
    Date of Patent: May 14, 1991
    Assignee: Terumo Kabushiki Kaisha
    Inventor: Keiji Yamaguchi