Correction method of linear pressure sensor

Abstract

The invention relates to a correction method of a linear pressure sensor. The correction method comprises the steps that 1) when non input or low input pressure is acquired, the actual output voltage of the pressure sensor is used as a low pressure correction parameter; 2) when high input pressure is acquired, the actual output voltage of the pressure sensor is used as a high pressure correction parameter; 3) according to the low pressure correction parameter and the high pressure correction parameter, an input and output equation after correction is acquired; and 4) the output voltage value of the pressure sensor is read, and the actual input pressure value is corrected according to the input and output equation after correction. Compared with the prior art, the correction method provided by the invention has the advantages that dynamic error correction is respectively carried out on each pressure sensor, thus the final sampling value is accurate and is close to the real value.

Description

technical field [0001] The invention relates to a calibration method, in particular to a calibration method for a linear pressure sensor. Background technique [0002] The future of human intelligence is inseparable from sensors, and the development of sensors is constantly advancing to meet the needs of automation applications. Everyone knows that there are many types of sensors, and the corresponding applications of different sensors are equally dazzling. In the huge Chinese sensor market, pressure sensors have always been leading the front-end of intelligence. [0003] Pressure sensors not only play an important role in production measurement, but also have countless applications of pressure sensors in real life. In contemporary times, pressure sensors are widely used in automatic measurement, and pressure sensors also play a very important role in train operation. [0004] The output accuracy of the pressure sensor has always been the concern of our users, but we often...

AI Technical Summary

Problems solved by technology

[0004] The output accuracy of the pressure sensor has always been the concern of our users, but we often rely too much on the output accuracy of the pressure sensor itself, forgetting the individual differences of the pressure sensor and the individual differences in the production and processing of our sampling circuit (resistance, capacitance errors, etc.), resulting in a large deviation in the sampling value of the end product, and even the sampling value exceeds the acceptable range

There is also a method to correct the deviation by means of software. After the pressure value is obtained by the pressure sensor, a fixed error value is added or subtracted to obtain the final value. This method has poor flexibility and large deviation, and cannot eliminate individual differences at all.

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