WO2001001095A1 - Transducteur sensible a la pression - Google Patents
Transducteur sensible a la pression Download PDFInfo
- Publication number
- WO2001001095A1 WO2001001095A1 PCT/JP2000/004234 JP0004234W WO0101095A1 WO 2001001095 A1 WO2001001095 A1 WO 2001001095A1 JP 0004234 W JP0004234 W JP 0004234W WO 0101095 A1 WO0101095 A1 WO 0101095A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- sensitive
- control means
- converter
- output
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2268—Arrangements for correcting or for compensating unwanted effects
- G01L1/2281—Arrangements for correcting or for compensating unwanted effects for temperature variations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/225—Measuring circuits therefor
- G01L1/2256—Measuring circuits therefor involving digital counting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2268—Arrangements for correcting or for compensating unwanted effects
- G01L1/2275—Arrangements for correcting or for compensating unwanted effects for non linearity
Definitions
- the present invention relates to a voltage conversion device having a circuit for reducing output offset and offset drift of a pressure-sensitive resistor.
- FIG. 14 is an explanatory view showing a conventional pressure-sensitive resistor.
- 51 is an upper film as an insulating substrate
- 52 is a lower film also as an insulating substrate
- 53 is an Ag electrode pattern formed on the lower film 52
- 54 is an upper film.
- An Ag electrode pattern is formed on the film 51 so as to face the Ag electrode pattern 53
- 55 is a pressure-sensitive conductor formed by being applied on the Ag electrode pattern 54.
- Lower film 52 and upper film 51 are arranged such that pressure-sensitive conductor 55 is in contact with Ag electrode pattern 53.
- the pressure-sensitive conductor 55 is formed by mixing conductive particles into an insulating rubber material.
- the pressure-sensitive conductor is generally formed by a printing method in order to reduce the cost, and the resistance value and the resistance value change depending on the thickness of the pressure-sensitive conductor. Since the characteristics fluctuate, set them to the desired resistance values and It is difficult to keep the variation of gender change constant. Therefore, it was difficult to obtain a desired output even if the resistance value of the pressure-sensitive resistor was directly converted into a voltage. Disclosure of the invention
- the present invention has been made to solve this problem, and has as its object to provide a pressure-sensitive conversion device including a circuit for reducing the output offset and offset drift of a pressure-sensitive resistor.
- a / D converter for inputting a signal from a resistor, a memory in which a correction value based on an error signal between an electrical characteristic of the pressure-sensitive resistor and a reference electrical characteristic is stored in advance, and a correction stored in this memory Based on the value, the signal from the A / D converter is corrected for electrical characteristics by a change in the resistance value of the pressure-sensitive resistor, and the DZA converter that converts the signal into a signal with predetermined electrical characteristics and outputs the signal is output.
- AZD converter input terminal It is obtained by the one provided an adjustment value input terminal for input signal.
- FIG. 1 is a block diagram of a pressure-sensitive conversion device according to Embodiment 1 of the present invention
- FIG. 2 is a flowchart of a control procedure in a correction value setting operation of the device
- FIG. 3 is an explanatory diagram of a correction operation of the device.
- Fig. 4 is a flowchart of the control procedure during normal operation of the device
- FIG. 5 is a block diagram of a pressure-sensitive conversion device according to Embodiment 2 of the present invention
- FIG. 6 is a flowchart of a control procedure of a correction value setting operation value of the device
- FIG. 7 is a control during normal operation of the device.
- FIG. 8 is a block diagram of a pressure-sensitive converter according to Embodiment 3 of the present invention
- FIG. 9 is a flowchart of a control procedure of a correction value setting operation value of the pressure-sensitive converter
- FIG. 11 is a block diagram of a pressure-sensitive converter according to Embodiment 4 of the present invention
- FIG. 11 is a block diagram of a pressure-sensitive converter according to Embodiment 5 of the present invention
- FIG. 13 is a flowchart for detecting an abnormality of the apparatus
- FIG. 14 is an explanatory view of a conventional pressure-sensitive resistor.
- FIG. 1 shows a pressure-sensitive converter according to Embodiment 1 of the present invention.
- reference numeral 1 denotes a pressure-sensitive resistor, which is disposed in two opposing insulating substrates shown in FIG. 2 is a control means, 3 and 4 are AZD converters included in the control means 2, and an A / D converter 4 is connected to the other of the pressure sensitive resistor 1 which is not grounded.
- 5 is a memory included in the control means 2
- 6 is a D / A converter included in the control means 2
- 7 is an adjustment value input terminal connected to the AZ D converter 3
- 8 is a power supply
- 9 is a power supply.
- This is a resistor connected between the non-grounded side of the pressure-sensitive resistor 1 and the power supply 8.
- the control means 2 roughly performs two operations. One is a correction value setting operation, and the other is a normal operation. The control means 2 performs the correction value setting operation when the correction value is not set, and performs the normal operation when the correction value is set.
- the correction value setting operation When performing the correction value setting operation, The control procedure of the stage 2 will be described with reference to the flowcharts of FIGS. 1 and 2, and FIG.
- To set the correction value an error signal between the output from the DZA converter 6 of the control means 2 and the output reference value of the control means 2 is input to the adjustment value input terminal 7.
- a voltage pulled up to the power supply 8 by the resistor 9 is applied to the pressure-sensitive resistor 1.
- the control means 2 inputs the A / D converter 3 to the A / D converter 3 from the adjustment value input terminal 7 in step S1 and performs AZD conversion.
- another AZD converter 4 inputs a voltage when a certain pressure is applied to the pressure-sensitive resistor 1 bull-uped to the power supply 8 by the resistor 9 to the power supply 8 to perform AZD conversion.
- the difference between the AZD-converted values indicates the offset error of the pressure-sensitive converter.
- the value corrected in step S2 based on the AZD conversion value is output from the DZA converter 6.
- this value is output from the control means 2 and adjusted.
- the control means 2 performs AZD conversion of the signal of the adjustment value input terminal 7 again, and determines whether or not this value is within a predetermined value as a correction error in step S3.
- step S5 the value is set as a correction value in the memory 5 in step S5, and the correction value setting operation ends in step S6. If not, the correction value is adjusted in step S4, and this operation is continued until the value falls within the default value.
- Curve A shows the pressure-voltage characteristic of the output reference value
- Curve B shows the characteristic within the correction error default value
- Curve C shows the output of pressure-sensitive resistor 1 and the output characteristic of DZA converter 6 before correction. Then, the voltage difference between the curves A and C is the error signal, and the voltage difference between the curves B and C is the correction value.
- the curve C is corrected in steps S3 and S4, and if it becomes a value between the curves A and B, it is written in the memory in step S5 and the correction value setting operation is completed.
- step S11 The correction value is read from the memory 5, and the value is output from the DZA converter 6 in step S13. The above operation is repeated during normal operation.
- the output can be converted and output so as to effectively cancel the offset, and the offset due to the variation in the resistance value of the pressure-sensitive resistor can be reduced.
- the memory 5 may be a rewritable memory.
- the correction value setting operation is performed again by providing the adjustment value input terminal 7 in the control means 2 even when the correction value is set. It is possible to do.
- the output of pressure-sensitive resistor 1 is input to adjustment value input terminal 7 and another AZD converter 4, but the switching switch switches between the signal from pressure-sensitive resistor 1 and the signal from adjustment value input terminal 7. The same effect can be obtained with the same A / D converter.
- FIG. 5 shows a pressure-sensitive converter according to Embodiment 2 of the present invention.
- reference numeral 10 denotes a pressure-sensitive resistor which is disposed in two opposing insulating substrates which are shown in detail in FIG.
- Numerals 11 indicate control means, 12 and 13 are AZD converters included in the control means 11, and AZD converters 13 are grounded to the pressure-sensitive resistor 10.
- 14 is a memory included in the control means 11
- 15 is a DZA comparator included in the control means 11
- 16 is an AZD comparator
- 17 is an adjustment value input terminal connected to the AZD converter
- 18 is a power supply
- 19 is the non-grounded side of the pressure-sensitive resistor 10. This is a resistor connected between power supplies 18.
- the control means 11 roughly performs two operations. One is a correction value setting operation, and the other is a normal operation.
- the control unit 11 performs a correction value setting operation when the correction value is not set, and performs a normal operation when the correction value is set.
- the pressure-sensitive converter is installed in a device that can control the temperature of a thermostat (hereinafter referred to as a thermostat).
- the adjustment value input terminal 17 has the DZA converter 1
- An error signal between the output from 5 and the output reference value of control means 11 is input.
- the temperature of the thermostat is controlled so as to trace all the operating temperatures of the pressure-sensitive converter.
- the control procedure of the control means 11 will be described with reference to the flowchart of FIG.
- the control means 11 sets the input of the A / D converter 12 to the temperature sensor 16 and converts the temperature information into AZD in step S21.
- the temperature is set so as to rise from the minimum operating temperature T1, and the temperature rise from the current temperature to the next correction temperature is continuously detected in step S22.
- the temperature rise is detected, it is determined in step S23 whether the temperature is the maximum operating temperature T2. If the maximum operating temperature has been exceeded, the correction value setting operation ends in step S24. If the maximum operating temperature T2 is not exceeded, set the input of the AZD converter 12 to the adjustment value input terminal 17 in step S25 and perform AZD conversion.
- the voltage when no pressure is applied to the pressure-sensitive resistor 10 pulled up to the power supply by the resistor 19 to another A / D converter 13 is input, and AZD conversion is performed. The difference between the AZD converted values is pressure-sensitive conversion 5 shows the offset error of the device.
- the value corrected in step S26 based on the AZD conversion value is output from the DZA converter 15. This value is output from the control means 11 and adjusted in steps S27 and S28.
- the control means 11 performs AZD conversion of the signal of the adjustment value input terminal 17 again, and determines whether or not this value is within a predetermined value as a correction error in step S27. If this value is within the predetermined value, in step S29, this value is set in the memory 14 as the temperature correction value at this time, the temperature is raised, and the detection of the next temperature is started. If not, the correction value is adjusted in step S28, and this operation is continued until the value falls within the default value.
- the control means 11 sets the input of the A / D converter 12 to the temperature sensor 16, and inputs the output of the pressure-sensitive resistor 10 to another AZD comparator 13, and the step S 3 1 Then, AZD conversion of the temperature and AZD conversion of the output of the pressure-sensitive resistor 10 are performed.
- step S32 the correction value for the temperature at that time is read from the memory 14, and in step S33, the value is output from the DZA converter 15. The above operation is repeated during normal operation.
- the offset at each temperature can be reduced, even if the pressure sensitive resistor has a complicated characteristic as a function of the temperature, it can be converted and output so as to effectively cancel the offset temperature drift.
- the relationship between the temperature and the change in the resistance value of the pressure-sensitive resistor 10 is determined by the temperature hysteresis inherent to the pressure-sensitive resistor 10 and the temperature sensor 16 Temperature hysteresis occurs due to the difference between the attachment position and the temperature change of the pressure sensitive resistor 10. As a result, when the temperature rises and when the temperature falls, a correction error occurs due to this hysteresis. When the correction value is determined by changing the minimum operating temperature T1 to the maximum operating temperature T2, the correction error becomes large when the temperature decreases during normal operation.
- the temperature change is cycled between the minimum operating temperature T1 and the maximum operating temperature T2, and the temperature correction value is set to the average value of the values at the time of temperature rise and temperature decrease, and normal operation is performed.
- the correction error at the time can be reduced.
- the AZD converter 12 uses the temperature sensor 16 and the adjustment value input terminal 17 by switching, the same effect can be obtained by using different A / D converters.
- the output of the pressure-sensitive resistor 10 is input to the temperature sensor 16 and the adjustment value input terminal 17 and another AZD converter, but is input to the same AZD converter using a switching switch. Has the same effect.
- FIG. 8 shows a pressure-sensitive converter according to Embodiment 3 of the present invention.
- reference numeral 20 denotes a group of two or more pressure-sensitive resistors which are arranged in two opposing insulating substrates and whose details are shown in FIG. 14 and one of which is grounded.
- 21 is a control means
- 22 and 23 are AZD converters included in the control means 21
- AZD converter 23 is the sensation Connected to the other non-grounded piezoresistor group 20.
- the adjustment value input terminal 27 is connected to the output from the D / A converter 25 of the control means 21 and the control means 2.
- An error signal with the output reference value of 1 is input.
- the control means 21 inputs the AZD converter 22 from the adjustment value input terminal 27 to perform A / D conversion.
- the voltage when a certain constant pressure is applied to each piezoresistive resistor of the piezoresistive resistor group 20 which is pulled up to the power supply 28 by the resistor group 29 by the resistor group 29 is input to another AZD converter 23. A / D conversion. The difference between these AZD-converted values indicates the offset error of the pressure-sensitive converter.
- step S42 The value corrected in step S42 based on the AZD conversion value is output from the D / A converter 25, and the output terminal group 26 is set in advance in a one-to-one relationship with the pressure-sensitive resistor.
- a signal is output from the terminal to determine which pressure-sensitive resistor is output.
- steps S43 and S44 this value is output from each pressure-sensitive resistor of the pressure-sensitive resistor group 20 and adjusted.
- the control means 21 performs A / D conversion of the signal of the adjustment value input terminal 27 again, and determines whether or not this value is within a predetermined value as a correction error in step S43.
- step S45 this value is set as a correction value in the memory 24, and in step S46, the memory 2 is set for all the pressure-sensitive resistors of the pressure-sensitive resistor group 20. Judge whether it is set to 4 If not, change the input of the AZD converter 23 to another pressure-sensitive resistor of the pressure-sensitive resistor group 20 in step S48, and perform the operation from step S42 on for all the pressure-sensitive resistors. Repeat. When all the pressure-sensitive resistors have been completed, the correction value setting operation is completed in step S47. If not, the correction value is adjusted in step S44, and this operation is continued until the value falls within the default value.
- the control means 21 inputs the output of the pressure sensitive resistor group 20 to the AZD converter 23, and performs AZD conversion of the output of the pressure sensitive resistor group 20 in step S51.
- step S52 the correction value is read from the memory 24, and in step S53, the value is output from the DZA converter 25, and the output terminal group previously set in a one-to-one relationship with the pressure-sensitive resistor is set.
- a signal is output from terminal 26 to determine which pressure-sensitive resistor is output.
- the above operation is repeated during normal operation. Therefore, even when there are multiple pressure sensitive resistors, it is possible to reduce the offset due to the variation of the pressure sensitive resistors.Convert and output so that the offset is effectively canceled even if the resistance value varies. Can be.
- the output of the pressure-sensitive resistor group 20 is input to the adjustment value input terminal 27 and another AZD converter in the evening, but the same applies when inputting to the same AZD converter using a switch or the like. The effect is obtained.
- the output terminal group 26 outputs from the terminal set one-to-one with the pressure-sensitive resistor. However, if a signal is output from the output terminal to determine which pressure-sensitive resistor is output by serial communication, the same effect can be obtained with fewer terminals than the number of pressure-sensitive resistors.
- FIG. 11 shows a pressure-sensitive converter according to Embodiment 4 of the present invention.
- reference numeral 30 denotes a pressure-sensitive resistor, which is disposed in two opposing insulating substrates and whose one is grounded, and is an electrical abbreviation, which is a symbol of volume, which is shown in FIG. 14 in detail.
- 31 is a control means
- 32 and 33 are AZD converters included in the control means 31
- an A / D converter 33 is connected to the ground of the pressure-sensitive resistor 30.
- Connected to the other end. 3 4 is a memory included in the control means 31, 35 is a DZA comparator included in the control means 31, 36 is a reference output voltage source, and 37 is a D / A converter 35.
- An error amplifier that inputs the output and the output of the reference output voltage source 36 and outputs it to the AZD converter 32, 38 is a power supply, 39 is a non-grounded side of the pressure sensitive resistor 30 and a power supply 3 8 Is a resistor connected between the two.
- the control means 31 performs a correction value setting operation and a normal operation, and performs the same operation as that shown in the first embodiment.
- the value of the adjustment value input terminal 7 in the first embodiment that has been subjected to AZD conversion is subjected to AZD conversion of the output of the error amplifier 37.
- the output from the error amplifier 37 is the same as that input from the adjustment value input terminal in the first embodiment.
- the output from the reference output voltage source 36 always outputs the center value of the offset of the pressure-sensitive converter, and this value is sufficiently stable over temperature and aging compared to that of the pressure-sensitive converter. Must be.
- the same effects as those described in the first embodiment can be obtained, and in addition, the following effects can be obtained. Since it has an error amplifier 37, there is no need to input an external adjustment value when performing the correction value setting operation. However, in order to improve the correction accuracy, the temperature and aging of the reference output voltage source 36 and the error amplifier 37 must be sufficiently compared with the resolution of the AZD comparator 33 of the control means 31. It must be small.
- FIG. 12 shows a pressure-sensitive converter according to Embodiment 5 of the present invention.
- FIG. 12 shows a pressure-sensitive conversion device according to Embodiment 5 of the present invention.
- reference numeral 40 denotes a pressure-sensitive conversion device arranged in two opposed insulating substrates, the details of which are shown in FIG. One of them is indicated by a volume symbol which is a pressure-sensitive resistor grounded and an electrical abbreviation, and 41 is control means, 42 and 43 are AZD converters included in the control means 41, The AZD converter 43 is connected to the other end of the pressure-sensitive resistor 40 that is not grounded.
- Reference numeral 44 denotes a memory included in the control means 41
- 45 denotes a DZA converter included in the control means 41
- 46 denotes a reference output voltage source
- 47 denotes the above: Error amplifier that inputs the output of the reference output voltage source 46 and the output of the reference output voltage source 46, and outputs it to the AZD converter 42
- 48 is a power supply
- 49 is the non-ground side of the pressure-sensitive resistor 40.
- a resistor 50 is connected between the power supply 48 and the power supply 48, and 50 is an abnormal value detection terminal connected to the control means 41.
- the control means 41 performs the correction value setting operation and the normal operation, and performs the same operation as that shown in the fourth embodiment.
- an abnormality is determined as shown in FIG. As shown in FIG. 13, when performing DZA conversion in step S61 and outputting the DZA converter 45, this value is read by the AZD converter 42, In step S62, AZD conversion is performed.In step S63, it is determined whether or not the DZA value matches the AZD value. In step S64, the abnormal value detection terminal 50 is set to active.
- the temperature abnormality can be detected by activating the abnormality detection terminal.
- the offset and the offset drift of the pressure-sensitive resistor having a large inherent offset and offset drift are reduced by providing the function of correcting the output of the pressure-sensitive resistor by the control means.
- a pressure-sensitive converter is obtained.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Measuring Fluid Pressure (AREA)
- Push-Button Switches (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/763,064 US6507202B1 (en) | 1999-06-29 | 2000-06-28 | Sensed-pressure-data converter |
EP00942357A EP1108999A4 (en) | 1999-06-29 | 2000-06-28 | PRESSURE SENSITIVE TRANSDUCER |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11/182854 | 1999-06-29 | ||
JP11182854A JP2001013016A (ja) | 1999-06-29 | 1999-06-29 | 感圧変換装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001001095A1 true WO2001001095A1 (fr) | 2001-01-04 |
Family
ID=16125626
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/004234 WO2001001095A1 (fr) | 1999-06-29 | 2000-06-28 | Transducteur sensible a la pression |
Country Status (4)
Country | Link |
---|---|
US (1) | US6507202B1 (ja) |
EP (1) | EP1108999A4 (ja) |
JP (1) | JP2001013016A (ja) |
WO (1) | WO2001001095A1 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7671836B2 (en) | 2005-01-03 | 2010-03-02 | Nokia Corporation | Cell phone with shiftable keypad |
JP2013235272A (ja) | 2012-05-10 | 2013-11-21 | Samsung Electronics Co Ltd | 多層型光学フィルム、その製造方法及び表示装置 |
EP3063514B1 (en) * | 2013-11-01 | 2019-05-08 | Mettler Toledo (Changzhou) Precision Instrument Ltd. | Analog sensor with digital compensation function |
JP5586776B1 (ja) * | 2013-12-27 | 2014-09-10 | 株式会社フジクラ | 入力装置及び入力装置の制御方法 |
CN104107032B (zh) * | 2014-06-24 | 2016-05-18 | 深圳市迈泰生物医疗有限公司 | 电子体温计及该电子体温计的校温方法 |
US20170307460A1 (en) * | 2016-04-25 | 2017-10-26 | Pratt & Whitney Canada Corp. | Correction of pressure measurements in engines |
CN109738712A (zh) * | 2018-12-12 | 2019-05-10 | 格力电器(武汉)有限公司 | 一种压缩机的线相序检测装置和方法及检测系统 |
US11478166B2 (en) | 2020-06-26 | 2022-10-25 | J. Brasch Co., Llc | Calibrating a sensing device for improved analog-to-digital converter resolution utilization |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US4399515A (en) * | 1981-03-31 | 1983-08-16 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Self-correcting electronically scanned pressure sensor |
JPS63290922A (ja) * | 1987-05-22 | 1988-11-28 | Matsushita Electric Works Ltd | 体重計 |
JPH0545520U (ja) * | 1991-11-22 | 1993-06-18 | 理化工業株式会社 | センサの補正装置 |
JPH06265425A (ja) * | 1993-03-12 | 1994-09-22 | Yamatake Honeywell Co Ltd | リーク判断機能付圧力センサ |
JPH0961276A (ja) * | 1995-08-23 | 1997-03-07 | Toyota Motor Corp | トルクメータの補正方法及びこれを用いるトルクメータ |
JPH1183420A (ja) * | 1997-09-12 | 1999-03-26 | Tokyo Sokki Kenkyusho:Kk | ひずみ測定モジュール及び多点ひずみ測定システム |
Family Cites Families (4)
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US4912397A (en) * | 1987-09-30 | 1990-03-27 | Eaton Corporation | Transducer linearizing system |
US5146788A (en) * | 1990-10-25 | 1992-09-15 | Becton, Dickinson And Company | Apparatus and method for a temperature compensation of a catheter tip pressure transducer |
JP3004782B2 (ja) | 1991-08-14 | 2000-01-31 | 日東電工株式会社 | 偏光板及び液晶表示装置 |
US5479096A (en) * | 1994-08-08 | 1995-12-26 | Lucas Industries, Inc. | Analog sensing system with digital temperature and measurement gain and offset correction |
-
1999
- 1999-06-29 JP JP11182854A patent/JP2001013016A/ja active Pending
-
2000
- 2000-06-28 WO PCT/JP2000/004234 patent/WO2001001095A1/ja not_active Application Discontinuation
- 2000-06-28 US US09/763,064 patent/US6507202B1/en not_active Expired - Fee Related
- 2000-06-28 EP EP00942357A patent/EP1108999A4/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4399515A (en) * | 1981-03-31 | 1983-08-16 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Self-correcting electronically scanned pressure sensor |
JPS63290922A (ja) * | 1987-05-22 | 1988-11-28 | Matsushita Electric Works Ltd | 体重計 |
JPH0545520U (ja) * | 1991-11-22 | 1993-06-18 | 理化工業株式会社 | センサの補正装置 |
JPH06265425A (ja) * | 1993-03-12 | 1994-09-22 | Yamatake Honeywell Co Ltd | リーク判断機能付圧力センサ |
JPH0961276A (ja) * | 1995-08-23 | 1997-03-07 | Toyota Motor Corp | トルクメータの補正方法及びこれを用いるトルクメータ |
JPH1183420A (ja) * | 1997-09-12 | 1999-03-26 | Tokyo Sokki Kenkyusho:Kk | ひずみ測定モジュール及び多点ひずみ測定システム |
Non-Patent Citations (1)
Title |
---|
See also references of EP1108999A4 * |
Also Published As
Publication number | Publication date |
---|---|
JP2001013016A (ja) | 2001-01-19 |
EP1108999A1 (en) | 2001-06-20 |
EP1108999A4 (en) | 2004-07-28 |
US6507202B1 (en) | 2003-01-14 |
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