Sensor temperature drift compensation method and pressure sensor box

Abstract

The invention belongs to the field of gas pressure measurement, and relates to a sensor temperature drift compensation method and a pressure sensor box. The pressure sensor box comprises a box body part and a circuit part, wherein the box body part consists of a pressure sensor [2] and an aviation plug [1]; and the circuit part is a compensation circuit consisting of an MAX 1452 chip and a peripheral circuit. According to the sensor temperature drift compensation method provided by the invention, calibration of temperature drift can be realized according to sensor characteristics, and the algorithm is simple and effective; and sensor full-range output temperature drift before correction of the temperature compensation method is 4 percent within a range of -40 to 125 DEG C, and the compensation accuracy can reach 0.5 percent after the compensation by the algorithm. The pressure sensor box integrates the gas pressure measurement of multiple passages, and has the advantages of simple structure, high sensitivity, excellent dynamic response characteristic, high overload resistance capacity, high measurement reliability, wide working temperature range and the like.

Description

Technical field [0001] The invention belongs to the field of gas pressure measurement, and relates to a sensor temperature drift compensation method and a pressure sensor box. Background technique [0002] Common pressure sensors have the advantages of simple structure, high sensitivity, good dynamic response characteristics, strong anti-overload ability, and easy realization of non-contact measurement, and are widely used. However, the common pressure measurement sensors are mostly single-channel measurement. By simply integrating the sensor and the compensation circuit, the test object may even be damaged due to the damage of the integrated system in the harsh test environment. The output of the pressure sensor is not only determined by the pressure it is subjected to, but also affected by the environmental temperature, that is, the pressure sensor has cross-sensitivity to temperature, which affects the performance and measurement accuracy of the sensor. This is suitable for hi...

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Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the shortcomings of scattered sensor installation, inconvenient use, serious temperature drift and low precision in the existing multi-point pressure measurement, the present invention provides a sensor temperature drift compensation method and a pressure sensor, which can improve Measurement Accuracy of Pressure Sensors

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