CN108956009B - Piezoelectric pressure sensor calibration method and device - Google Patents
Piezoelectric pressure sensor calibration method and device Download PDFInfo
- Publication number
- CN108956009B CN108956009B CN201811154852.0A CN201811154852A CN108956009B CN 108956009 B CN108956009 B CN 108956009B CN 201811154852 A CN201811154852 A CN 201811154852A CN 108956009 B CN108956009 B CN 108956009B
- Authority
- CN
- China
- Prior art keywords
- sensor
- pressure
- calibrated
- sensitivity
- standard
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000035945 sensitivity Effects 0.000 claims abstract description 35
- 238000001514 detection method Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 description 3
- 229910005540 GaP Inorganic materials 0.000 description 1
- 238000009838 combustion analysis Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- HZXMRANICFIONG-UHFFFAOYSA-N gallium phosphide Chemical compound [Ga]#P HZXMRANICFIONG-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/08—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of piezoelectric devices, i.e. electric circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a piezoelectric pressure sensor calibration method, which comprises the following steps of S1, applying continuous pressure to a standard sensor and a sensor to be calibrated; s2, acquiring a first pressure curve of a standard sensor and a second pressure curve of a sensor to be calibrated; s3, determining time points Ta and Tb corresponding to 10% Pmax and 90% Pmax in the first pressure curve according to the maximum value Pmax of the first pressure curve; s4, equally dividing the time period from Ta to Tb into n parts to obtain time points T1 to Tn-1; s5, calculating the sensitivity Sca, scb, sc 1-Scn-1 of the sensor to be calibrated at time points Ta, tb and T1-Tn-1 according to the pressure value of the first pressure curve and the corresponding sensitivity and the pressure value of the second pressure curve; and S6, linearizing the sensitivity Sca, scb, sc-Scn-1 to obtain the linearity error of the sensor to be calibrated. The invention also discloses a piezoelectric pressure sensor calibration device corresponding to the method. The invention can calibrate according to the continuous pressure value, has high working efficiency and high result accuracy.
Description
Technical Field
The invention relates to the technical field of sensor calibration, in particular to a piezoelectric pressure sensor calibration method and device.
Background
The piezoelectric pressure sensor is a pressure sensor made of materials with piezoelectric effect (such as quartz, gallium phosphide and the like), and has the characteristics of small volume, good dynamic characteristics and high temperature resistance, so that the sensor is often used for measuring in-cylinder pressure in combustion analysis tests of an internal combustion engine. The sensitivity of the piezoelectric pressure sensor changes after a period of use, and the piezoelectric pressure sensor needs to be calibrated regularly to ensure the accuracy of the measured pressure.
The current calibration method of the piezoelectric pressure sensor mainly uses a single-point constant value calibration method: the calibrating device mainly comprises a pressure generator, a pressure indicator, a charge amplifier and a data acquisition instrument, wherein after the sensor is installed in the calibrating device, the pressure generator is used for pressurizing the sensor, the pressurizing is stopped after the pressure is increased to a fixed value PN, and the data acquisition instrument records the voltage V0 output by the charge amplifier at the moment. The sensitivity Sc of the sensor to be calibrated is equal to:
Sc＝(V0×F×SN)/PN；
wherein Sc is the sensitivity [ pC/bar ] of the sensor to be calibrated, V0 is the voltage [ V ] output by the charge amplifier, F is the gain [ bar/V ] of the charge amplifier, SN is the sensitivity [ pC/bar ] of the sensor set by the charge amplifier, PN is the pressure value [ bar ] displayed by the pressure indicator.
According to the single-point fixed value calibration method, only one pressure fixed value PN can be set for calibrating the sensitivity Sc of the sensor at a time, the sensitivity Sc values of different PN value sensors are different, multiple times of calibration are required for obtaining the Sc values of the sensors under different PN values, the working efficiency is low, errors are easily generated when the pressure indicator is manually read, and the accuracy of the calibration result is affected.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and aims to provide a piezoelectric pressure sensor calibration method which can calibrate according to continuous pressure values, is high in working efficiency and is high in result accuracy.
The invention aims at providing the piezoelectric pressure sensor calibration device which has a simple structure, is convenient to use and can collect continuous pressure values for calibration.
In order to achieve the above object, the present invention provides a piezoelectric pressure sensor calibration method, comprising the steps of,
s1, simultaneously applying continuous pressure to a standard sensor and a sensor to be calibrated;
s2, acquiring a first pressure curve detected by a standard sensor and a second pressure curve detected by a sensor to be calibrated;
s3, determining a time point Ta corresponding to 10% Pmax and a time point Tb corresponding to 90% Pmax in the first pressure curve according to the maximum value Pmax in the first pressure curve;
s4, equally dividing the time period from the time point Ta to the time point Tb into n parts to obtain corresponding time points T1 to Tn-1;
s5, calculating the corresponding sensitivity Sca, scb, sc-Scn-1 of the sensor to be calibrated in the time period according to the pressure value of the first pressure curve, the sensitivity of the corresponding standard sensor and the pressure value of the second pressure curve at the time points Ta, tb and T1-Tn-1 respectively;
and S6, linearizing the sensitivity Sca, scb, sc-Scn-1 to obtain the linearity error of the sensor to be calibrated.
As a further improvement, in step S3, the time points Ta and Tb are each time points within the same continuous pressure increasing section.
Further, in step S4, the time period equal fraction n++5.
Further, in step S5, the sensitivity formula of the sensor to be calibrated is calculated as: sc=pc/ps·ss, where Sc is the sensitivity of the sensor to be calibrated, ss is the sensitivity of the standard sensor, pc is the pressure value of the sensor to be calibrated, ps is the pressure value of the standard sensor.
Further, in step S6, the sensitivities Sca, scb, sc to Scn-1 are linearized using a least square method.
In order to achieve the second purpose, the invention provides a piezoelectric pressure sensor calibration device, which comprises a pressure generator for applying continuous pressure, a signal amplifier for amplifying sensor detection signals, a data acquisition card for acquiring multiple paths of signals and a logic operation unit, wherein the signal amplifier, the data acquisition card and the logic operation unit are connected in sequence; the pressure generator applies continuous pressure to the standard sensor and the sensor to be calibrated simultaneously, detection signals of the standard sensor and the sensor to be calibrated are amplified by the signal amplifier and then input into the data acquisition card, and the logic operation unit calculates the linear error of the sensor to be calibrated according to the detection signals of the standard sensor and the sensor to be calibrated obtained by the data acquisition card.
Advantageous effects
Compared with the prior art, the invention has the advantages that:
1. the sensitivity of the sensor to be calibrated is obtained by acquiring a first pressure curve of the standard sensor and a second pressure curve of the sensor to be calibrated and calculating the pressure value of the first pressure curve, the sensitivity of the corresponding standard sensor and the pressure value of the second pressure curve at a plurality of time points, so that the sensor to be calibrated can be calibrated according to continuous pressure values, the working efficiency is high, and the result accuracy is high;
2. according to the maximum value Pmax in the first pressure curve, the time points Ta and Tb corresponding to the two values of 10% & Pmax and 90% & Pmax in the first pressure curve are determined, so that the influence of curvature of the first pressure curve at the maximum value and the minimum value can be reduced, and the accuracy of a calibration result is ensured;
3. the time points Ta and Tb are time points in the same continuous pressure increasing section, so that the influence of pressure fluctuation on detection can be reduced, and the calibration precision is improved;
4. and the sensitivity is linearized by using a least square method, so that the fitting precision is high and the speed is high.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic illustration of a first pressure curve and a second pressure curve;
FIG. 3 is an enlarged schematic view of a first pressure curve and a second pressure curve;
fig. 4 is a schematic structural view of the present invention.
Wherein: 1-pressure generator, 2-signal amplifier, 3-data acquisition card, 4-logic operation unit, 5-standard sensor, 6-sensor that waits to calibrate.
Detailed Description
The invention will be further described with reference to specific embodiments in the drawings.
Referring to fig. 1-4, a method of calibrating a piezoelectric pressure sensor, comprising the steps of,
s1, simultaneously applying continuous pressure to a standard sensor and a sensor to be calibrated;
s2, acquiring a first pressure curve detected by a standard sensor and a second pressure curve detected by a sensor to be calibrated;
s3, determining a time point Ta corresponding to 10% of Pmax and a time point Tb corresponding to 90% of Pmax in the first pressure curve according to the maximum value Pmax in the first pressure curve, so that the influence of curvature of the first pressure curve at the maximum value and the minimum value can be reduced, and the accuracy of a calibration result is ensured;
s4, equally dividing the time period from the time point Ta to the time point Tb into n parts, obtaining the corresponding time points T1 to Tn-1, wherein the greater the n value is, the higher the calibration accuracy is, but the slower the data processing speed is, and the time period equal fraction n is not less than 5 as the optimization is, so that the accuracy of the calibration result can be effectively ensured;
s5, calculating the corresponding sensitivity Sca, scb, sc-Scn-1 of the sensor to be calibrated in the time period according to the pressure value of the first pressure curve, the sensitivity of the corresponding standard sensor and the pressure value of the second pressure curve at the time points Ta, tb and T1-Tn-1 respectively;
and S6, linearizing the sensitivity Sca, scb, sc-Scn-1 to obtain the linearity error of the sensor to be calibrated.
In step S3, the time points Ta and Tb are both time points in the same continuous pressure increasing section, so that the influence of pressure fluctuation on detection can be reduced, and the calibration accuracy can be improved.
In step S5, the sensitivity formula of the sensor to be calibrated is calculated as: sc=pc/ps·ss, where Sc is the sensitivity of the sensor to be calibrated, ss is the sensitivity of the standard sensor, pc is the pressure value of the sensor to be calibrated, ps is the pressure value of the standard sensor.
In step S6, the sensitivities Sca, scb, sc to Scn-1 are linearized by using the least square method, and the fitting accuracy and the fitting speed are high.
As shown in fig. 2 and 3, a curve a shows a first pressure curve, a curve B shows a second pressure curve, and in fig. 3, the time periods from the time point Ta to the time point Tb are equally divided into 5 parts, and intermediate time points T1, T2, T3, and T4 are obtained, respectively.
The sensitivity of the sensor to be calibrated is obtained by acquiring the first pressure curve of the standard sensor and the second pressure curve of the sensor to be calibrated and calculating the pressure value of the first pressure curve, the sensitivity of the corresponding standard sensor and the pressure value of the second pressure curve at a plurality of time points, so that the sensor to be calibrated can be calibrated according to continuous pressure values, the working efficiency is high, and the result accuracy is high.
The piezoelectric pressure sensor calibration device comprises a pressure generator 1 for applying continuous pressure, a signal amplifier 2 for amplifying sensor detection signals, a data acquisition card 3 for acquiring multipath signals and a logic operation unit 4, wherein the signal amplifier 2, the data acquisition card 3 and the logic operation unit 4 are sequentially connected; the pressure generator 1 applies continuous pressure to the standard sensor 5 and the sensor 6 to be calibrated at the same time, detection signals of the standard sensor 5 and the sensor 6 to be calibrated are amplified by the signal amplifier 2 and then input into the data acquisition card 3, and the logic operation unit 4 calculates the linear error of the sensor 6 to be calibrated according to the detection signals of the standard sensor 5 and the sensor 6 to be calibrated obtained by the data acquisition card 3 and outputs the linear error; the device has simple structure and convenient use, and can collect continuous pressure values for calibration.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these do not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (5)
1. A piezoelectric pressure sensor calibration method is characterized in that: comprises the steps of,
s1, simultaneously applying continuous pressure to a standard sensor and a sensor to be calibrated;
s2, acquiring a first pressure curve detected by a standard sensor and a second pressure curve detected by a sensor to be calibrated;
s3, determining a time point Ta corresponding to 10% Pmax and a time point Tb corresponding to 90% Pmax in the first pressure curve according to the maximum value Pmax in the first pressure curve;
s4, equally dividing the time period from the time point Ta to the time point Tb into n parts to obtain corresponding time points T1 to Tn-1;
s5, calculating the corresponding sensitivity Sca, scb, sc-Scn-1 of the sensor to be calibrated in the time period according to the pressure value of the first pressure curve, the sensitivity of the corresponding standard sensor and the pressure value of the second pressure curve at the time points Ta, tb and T1-Tn-1 respectively;
s6, linearizing the sensitivity Sca, scb, sc-Scn-1 to obtain the linearity error of the sensor to be calibrated;
in step S5, the sensitivity formula of the sensor to be calibrated is calculated as: sc=pc/ps·ss, where Sc is the sensitivity of the sensor to be calibrated, ss is the sensitivity of the standard sensor, pc is the pressure value of the sensor to be calibrated, ps is the pressure value of the standard sensor.
2. A method of calibrating a piezoelectric pressure sensor according to claim 1, wherein: in step S3, the time points Ta and Tb are each time points within the same continuous pressure increasing section.
3. A method of calibrating a piezoelectric pressure sensor according to claim 1, wherein: in step S4, the time period equal fraction n+.5.
4. A method of calibrating a piezoelectric pressure sensor according to claim 1, wherein: in step S6, the sensitivities Sca, scb, sc1 to Scn-1 are linearized using a least square method.
5. An apparatus for performing the method of calibrating a piezoelectric pressure sensor according to any of claims 1-4, characterized in that: the device comprises a pressure generator (1) for applying continuous pressure, a signal amplifier (2) for amplifying sensor detection signals, a data acquisition card (3) for acquiring multipath signals and a logic operation unit (4), wherein the signal amplifier (2), the data acquisition card (3) and the logic operation unit (4) are sequentially connected; the pressure generator (1) applies continuous pressure to the standard sensor (5) and the sensor (6) to be calibrated simultaneously, detection signals of the standard sensor (5) and the sensor (6) to be calibrated are amplified by the signal amplifier (2) and then input into the data acquisition card (3), and the logic operation unit (4) acquires the detection signals of the standard sensor (5) and the sensor (6) to be calibrated according to the data acquisition card (3) to calculate the linear error of the sensor (6) to be calibrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811154852.0A CN108956009B (en) | 2018-09-30 | 2018-09-30 | Piezoelectric pressure sensor calibration method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811154852.0A CN108956009B (en) | 2018-09-30 | 2018-09-30 | Piezoelectric pressure sensor calibration method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108956009A CN108956009A (en) | 2018-12-07 |
| CN108956009B true CN108956009B (en) | 2023-09-19 |
Family
ID=64472469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811154852.0A Active CN108956009B (en) | 2018-09-30 | 2018-09-30 | Piezoelectric pressure sensor calibration method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108956009B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110632679B (en) * | 2019-09-23 | 2022-04-19 | 深圳市深创谷技术服务有限公司 | Signal calibration method, test device and computer readable storage medium |
| JP7425867B2 (en) * | 2019-11-12 | 2024-01-31 | キストラー ホールディング アクチエンゲゼルシャフト | A cutting machine with a force transducer, a method of operating the cutting machine, and a method of calibrating the force transducer of the cutting machine |
| CN112284435B (en) * | 2020-09-23 | 2022-09-23 | 北京致感致联科技有限公司 | Piezoelectric substrate device, self-calibration method and system thereof, and monitoring system |
| CN113504004B (en) * | 2021-06-01 | 2023-03-24 | 东风柳州汽车有限公司 | Cylinder pressure sensor calibration system and method |
| CN113340525B (en) * | 2021-06-07 | 2022-08-23 | 安徽工业大学 | Method for acquiring working characteristic parameters of piezoelectric pressure sensor for implementing quasi-static calibration |
| CN114859021B (en) * | 2022-05-13 | 2023-10-03 | 江苏徐工工程机械研究院有限公司 | Calibration method and device for lubricating oil pollution degree sensor |
| CN118362037A (en) * | 2024-06-20 | 2024-07-19 | 珠海格力电器股份有限公司 | Sensor calibration method, device, medium, terminal equipment and program product |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334330A (en) * | 2008-07-29 | 2008-12-31 | 中北大学 | Method for metering sensitivity of electronic pressure detector |
| WO2011029182A1 (en) * | 2009-09-08 | 2011-03-17 | Microbridge Technologies Canada Inc. | Sensor response calibration for linearization |
| EP2490003A1 (en) * | 2011-02-18 | 2012-08-22 | Airbus Operations GmbH | Method and device for calibrating load sensors |
| DE102012009120A1 (en) * | 2011-05-19 | 2012-11-22 | Mazda Motor Corporation | Oil pressure determining apparatus, method and computer program product for an engine |
| CN103837300A (en) * | 2014-03-19 | 2014-06-04 | 成都千嘉科技有限公司 | Pressure sensor calibration method with temperature compensation function |
| CN105716787A (en) * | 2016-02-19 | 2016-06-29 | 云南电网有限责任公司电力科学研究院 | Calibration method of fiber grating pressure sensor |
| CN206038317U (en) * | 2016-08-29 | 2017-03-22 | 浙江华天机械有限公司 | Engine oil pump test bed |
| CN106768613A (en) * | 2016-12-08 | 2017-05-31 | 广西玉柴机器股份有限公司 | The measurement apparatus of combustion knock |
| CN108956147A (en) * | 2018-09-30 | 2018-12-07 | 广西玉柴机器股份有限公司 | A kind of method and device of the interior detection engine steering pump of rack |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2415980B1 (en) * | 2009-03-31 | 2019-05-22 | Toyota Jidosha Kabushiki Kaisha | Oil pressure control apparatus of internal combustion engine |
| DE102015001500A1 (en) * | 2015-02-05 | 2016-08-11 | Hella Kgaa Hueck & Co. | Method for calibrating at least one sensor, in particular a pressure sensor, with at least one signal-conducting connection to at least one signal converter |
-
2018
- 2018-09-30 CN CN201811154852.0A patent/CN108956009B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334330A (en) * | 2008-07-29 | 2008-12-31 | 中北大学 | Method for metering sensitivity of electronic pressure detector |
| WO2011029182A1 (en) * | 2009-09-08 | 2011-03-17 | Microbridge Technologies Canada Inc. | Sensor response calibration for linearization |
| EP2490003A1 (en) * | 2011-02-18 | 2012-08-22 | Airbus Operations GmbH | Method and device for calibrating load sensors |
| DE102012009120A1 (en) * | 2011-05-19 | 2012-11-22 | Mazda Motor Corporation | Oil pressure determining apparatus, method and computer program product for an engine |
| CN103837300A (en) * | 2014-03-19 | 2014-06-04 | 成都千嘉科技有限公司 | Pressure sensor calibration method with temperature compensation function |
| CN105716787A (en) * | 2016-02-19 | 2016-06-29 | 云南电网有限责任公司电力科学研究院 | Calibration method of fiber grating pressure sensor |
| CN206038317U (en) * | 2016-08-29 | 2017-03-22 | 浙江华天机械有限公司 | Engine oil pump test bed |
| CN106768613A (en) * | 2016-12-08 | 2017-05-31 | 广西玉柴机器股份有限公司 | The measurement apparatus of combustion knock |
| CN108956147A (en) * | 2018-09-30 | 2018-12-07 | 广西玉柴机器股份有限公司 | A kind of method and device of the interior detection engine steering pump of rack |
Non-Patent Citations (4)
| Title |
|---|
| 基于多传感器数据融合的准静态校准数据处理方法;沈静华;裴东兴;张瑜;;传感技术学报(第07期);全文 * |
| 水中压力传感器灵敏度校准的研究;殷俊兰;苏健军;陈君;;传感器与微系统(第12期);全文 * |
| 水击压力传感器现场校准方法研究;混平;单琳;刘军;耿直;;火箭推进(第03期);全文 * |
| 高压压电传感器静态与准静态校准方法研究;狄长安 等;《弹道学报》;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108956009A (en) | 2018-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108956009B (en) | Piezoelectric pressure sensor calibration method and device | |
| CN103837300B (en) | With the pressure sensor calibration method of temperature compensation | |
| CN101936791B (en) | Digital pressure gauge | |
| CN101858811B (en) | Method for compensating signal of high-precision pressure sensor | |
| CN100554902C (en) | Be applicable to the temperature simple calibrating method of reflection-type polarization-preserving fiber temperature sensor | |
| CN101706346B (en) | Method for compensating for nonlinear temperature drift of measurement of intelligent force sensor | |
| CN206057424U (en) | A kind of current measuring device | |
| CN103162901A (en) | Nonlinear calibrating method for multiple temperature points of pressure sensor | |
| CN107478382B (en) | Automatic detection device and detection method for pressure instrument | |
| CN101750185A (en) | Method for measuring accuracy of small pressure | |
| CN106443543A (en) | Linearity testing method for current sensor | |
| CN106679842A (en) | Temperature measuring method and circuit adopting reference voltage compensation technology | |
| CN101915869A (en) | Method for reducing measuring error introduced by excitation signal amplitude fluctuations and implementation device | |
| CN106343974A (en) | Temperature drift compensation device and method for measuring micro signal | |
| CN102519666B (en) | Digital temperature compensation system and method | |
| CN105527056A (en) | Temperature reference-based pressure compensation calibration method | |
| CN205607567U (en) | Multrirange array pressure sensing chip and check out test set thereof | |
| CN103604525A (en) | Thermal resistor temperature measuring instrument based on verification data | |
| CN103398793A (en) | Temperature measuring device based on thermocouple cold end compensation technology | |
| CN106344039A (en) | Weak signal precision measurement device and method of bio-sensors | |
| CN113951859A (en) | Intracranial pressure sensor signal conditioning method | |
| CN109253781A (en) | The calibration method and calibration system of throttle type differential pressure flow sensor | |
| CN102768096B (en) | Pressure measuring device with temperature drift compensation function | |
| CN107643095A (en) | A kind of calibration method of sensor chip and the chip calibration programmable device of application this method | |
| Chen et al. | Embedded electronic scale measuring system based on STM32 single chip microcomputer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |