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Pressure sensor calibration system

A pressure sensor and calibration system technology, applied in the direction of force/torque/work measurement instrument calibration/test, measurement of fluid pressure, instruments, etc., can solve problems such as the absence of pressure sensors, achieve fewer measurement points, and enhance prediction and forecasting capabilities and statistical control effect, the effect of improving accuracy

Inactive Publication Date: 2018-01-05
SHANGHAI RES INST OF MICROELECTRONICS SHRIME PEKING UNIV
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Problems solved by technology

At present, most pressure sensors believe that their static output characteristics are linear, and the most common processing method is to use the least squares straight line to fit the working curve. However, in the experimental calibration, there is no pressure sensor whose static output characteristics are completely linear. of

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, specific embodiment of the present invention is described further:

[0024] Such as figure 1 As shown, the implementation flow chart of the pressure sensor calibration system described in the patent of the present invention includes the following processes:

[0025] Download the firmware to the chip.

[0026] Set the ambient temperature point as T1, under this ambient temperature, set the pressure points as P1T1, P2T1 and P3T1 respectively, measure and save the corresponding sensor output voltage and power supply voltage.

[0027] Set the ambient temperature point as T2, under this ambient temperature, set the pressure points as P1T2, P2T2 and P3T2 respectively, measure and save the corresponding sensor output voltage and power supply voltage.

[0028] Calculate the pressure coefficient to be solved according to the multiple regression equation model and the calibration data obtained above, and obtain the calibration equ...

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Abstract

The invention provides a pressure sensor calibration system, which adopts a multiple regression equation to fit output characteristics of a pressure sensor. The pressure sensor calibration system comprises that two groups of calibration data at an environmental temperature T1 and an environmental temperature T2 are acquired; a pressure coefficient to be solved is calculated according to a multipleregression equation model and the acquired two groups of calibration data; and two pressure points are set to check whether the pressure sensor passes the test or not. The output characteristics of the pressure sensor are fit by adopting the multiple regression equation, thereby being capable of eliminating the influences brought about by the nonlinearity, and improving the accuracy of the pressure sensor. The number of acquired calibration data measurement points is small, and only six groups of data at two temperatures are required to obtain calibration equation parameters. In addition, thepressure sensor calibration system is not affected by the power supply voltage, that is, a pressure sensor under test can also be accurately calibrated when the power supply voltage changes.

Description

technical field [0001] The invention relates to the technical field of pressure sensor calibration, in particular to a pressure sensor calibration system. Background technique [0002] A pressure sensor is a device that can sense a pressure signal and convert the pressure signal into an electrical signal output according to a certain rule. It is the most commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools, pipelines and many other industries. [0003] In order to ensure the measurement uncertainty of the pressure sensor, it is necessary to calibrate the newly developed or in-use pressure sensor. And due to the influence of temperature, its zero point often drifts, so it needs to be temperature compen...

Claims

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Application Information

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IPC IPC(8): G01L25/00G01L27/00
Inventor 沈立程玉华
Owner SHANGHAI RES INST OF MICROELECTRONICS SHRIME PEKING UNIV
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