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Method for decreasing basic error of pressure sensor

A pressure sensor, basic error technology, applied in the direction of measuring fluid pressure, instruments, measuring devices, etc., can solve the problem that the basic error of the pressure sensor cannot be reduced, and achieve the effect of improving the basic measurement accuracy, simple method, and reducing the basic error

Inactive Publication Date: 2010-09-29
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] In order to overcome the inability of the prior art to reduce the basic error of the pressure sensor, the present invention provides a method for reducing the basic error of the pressure sensor, which overcomes the weakness of the prior art and reduces the basic error of the pressure sensor , to improve measurement accuracy

Method used

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  • Method for decreasing basic error of pressure sensor
  • Method for decreasing basic error of pressure sensor

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Embodiment 1

[0019] Such as figure 2 Shown, the present invention comprises the following steps:

[0020] 1. Select the range of the pressure calibrator = the range of the pressure sensor = 10KPa, and divide the range of the pressure calibrator into 10 {P 预校准1 ,...,P 预校准10} Pre-calibrated pressure is applied to the pressure sensor, adjust the output of the pressure calibrator so that the pressure sensor produces 10 pressure measurement data {P 测量1 ,...P 测量10} and the corresponding voltage measurement {V 测量1 ,...V 测量10}, and respectively store 10 pressure data and 10 voltage measurement values ​​according to the order of measurement.

[0021] 2. Put 10 {P 测量1 ,...P 测量10} As the data used for calibration, input to the pressure calibrator one by one in sequence, start the pressure calibrator again to apply to the pressure sensor, use 10 calibration data {P 测量1 ,...,P 测量10} Calibrate the range of the pressure sensor one by one to get 10 pressure calibration coefficients {C 校准系数1 ,.....

Embodiment 2

[0028] Such as figure 2 Shown, the present invention comprises the following steps:

[0029] 1. Select the range of the pressure calibrator = the range of the pressure sensor = 2MPa, and divide the range of the pressure calibrator into 200 {P 预校准1 ,...,P 预校准200}The pre-calibrated air pressure is applied to the pressure sensor, and the output of the pressure calibrator is adjusted so that the pressure sensor produces 200 pressure measurement data{P 测量1 ,...,P 测量200} and the corresponding voltage measurement {V 测量1 ,...,V 测量200}, and respectively store 200 pressure data and 200 voltage measurement values ​​according to the order of measurement.

[0030] 2. Put 200 {P 测量1 ,...,P 测量200} As the data used for calibration, input to the pressure calibrator one by one in sequence, start the pressure calibrator again to apply to the pressure sensor, use 200 calibration data {P 测量1 ,...,P 测量200} Calibrate the range of the pressure sensor one by one to get 200 pressure calibrati...

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Abstract

The invention discloses a method for decreasing the basic error of a pressure sensor. The measuring range of a pressure calibration instrument is equally divided, the pressure sensor generates M pressure measurement data and the corresponding voltage, the measuring range of the pressure sensor is calibrated one by one to obtain M pressure calibration coefficients, the M pressure calibration coefficients are respectively multiplied by X times to obtain the calibration m of pressure calibration values C, the calibration m of the M pressure calibration values C is multiplied by the measurement m of M voltage measurement values V generated by the pressure sensor at the corresponding pre-calibrated air pressure to obtain M pressure values Pm, and the accuracy grades of a group of pressure values Pm are determined and are compared; and when the detected accuracy grades are not increased any more, the optimal value of the coefficients of the measuring range of the sensor is obtained. The invention can decrease the basic error of the pressure sensor and enhances the basic measurement accuracy of the measurement of the pressure sensor.

Description

technical field [0001] The invention relates to the technical field of pressure sensor calibration and measurement, in particular to a method for reducing the basic error in the system error of the pressure sensor. Background technique [0002] Various sensor systems have errors due to various reasons, and pressure sensors are no exception. During the measurement process, there are systematic errors in the pressure sensor. Finding out and reducing the system error is beneficial to improve the measurement accuracy. Therefore, it is very important to study how to reduce the system error of the pressure sensor. For this reason, scholars at home and abroad have done a lot of research on reducing the pressure sensor error from different angles, and applied for a large number of patents, such as: 1. The "pressure sensor error correction method" disclosed by the Chinese patent application number CN200610088029. 2. The Chinese patent application number CN200910004648.5 "system and ...

Claims

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Application Information

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IPC IPC(8): G01L27/00
Inventor 金承信高正红高永卫惠增宏焦予秦
Owner NORTHWESTERN POLYTECHNICAL UNIV
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