Compensation process for detecting temperature for temperature sensor

Abstract

The invention provides a method for compensating the temperature detected by a temperature sensor, belonging to the sensing measurement and control field. Firstly, a Chinese Standard No.1 mercury thermometer is taken as the temperature detecting standard, a mathematic model of the temperature sensor Pt100 is established, and a transfer function is determined; secondly, parameters of the transfer function of the temperature sensor Pt100 is determined through experiments, a third-order model is introduced to describe the temperature property of the temperature sensor, an MATLAB software is used to fit the experimental data, a penalty function is introduced, and a penalty algorithm is determined; and finally, a difference equation realized by computer language is transferred to fulfill the purpose of automatically detecting the temperature. The compensating method ensures that the dynamic property of the temperature sensor Pt100 approaches the dynamic property of the Chinese Standard No.1 mercury thermometer well, which is verified in the practical application well. The method is convenient and easy to implement and has accurate measurement result.

Description

technical field [0001] The invention belongs to the field of sensor measurement and control, in particular to a compensation method for temperature detection by a temperature sensor, which is applied to the field of precise temperature performance detection of automatic detection instruments. Background technique [0002] Early temperature detection was mostly manual operation, and the national standard No. 1 mercury thermometer was commonly used for temperature detection. With the development of computer technology, automatic detection instruments have gradually replaced manual instruments, and it is the general trend to use temperature sensors instead of liquid thermometers. The disadvantages of the manual detection instrument using the national standard No. 1 mercury thermometer are: low efficiency, inability to realize process control, especially inability to realize automation and informatization. The automatic detection instrument uses a temperature sensor Pt100 inste...

AI Technical Summary

Problems solved by technology

The disadvantages of manual detection instruments using the national standard No. 1 mercury thermometer are: low efficiency, inability to realize process control, especially inability to realize automation and informatization

This method of selecting a special temperature point and using linear calibration between specific temperature points, although it makes the two have the same dynamic characteristics at a fixed temperature point, has great limitations, and needs to be adjusted for each Instrument-by-instrument correction

Images