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Zero position temperature drift estimation method of Wheatstone bridge type sensor

A zero temperature drift and sensor technology, which is applied in the direction of instruments, special recording/indicating devices, measuring devices, etc., can solve the problems of the zero drift of the Wheatstone bridge sensor, and achieve the effect of improving the calibration accuracy

Active Publication Date: 2021-07-09
PEKING UNIV
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Problems solved by technology

Therefore, it is impossible to theoretically calculate the zero drift of the Wheatstone bridge sensor

Method used

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  • Zero position temperature drift estimation method of Wheatstone bridge type sensor
  • Zero position temperature drift estimation method of Wheatstone bridge type sensor
  • Zero position temperature drift estimation method of Wheatstone bridge type sensor

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Embodiment 1

[0043] This embodiment provides a method for estimating zero temperature drift of a Wheatstone bridge sensor, such as figure 1 As shown, the method includes the following steps:

[0044] S100: Establish a quasi-linear model of the zero temperature drift of the Wheatstone bridge sensor based on the known Wheatstone bridge sensor;

[0045] The Wheatstone bridge structure can be used in various fields, such as pressure sensors, magnetoresistive sensors, electric field sensors, and so on. For ease of understanding, this embodiment takes a magnetoresistive sensor as an example for description. There are many kinds of magnetoresistive sensors, taking HMC1001 as an example, figure 2 The equivalent circuit of the Wheatstone bridge magnetoresistive sensor is shown, which is a typical application circuit of the Wheatstone bridge magnetoresistive sensor. The meaning of each variable in the figure is shown in Table 1 below:

[0046] Table 1 Definition of variables in the equivalent cir...

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Abstract

The invention provides a zero-position temperature drift estimation method of a Wheatstone bridge type sensor. According to the method, a quasi-linear model for describing zero-position temperature drift of the Wheatstone bridge type sensor is established. By means of the quasi-linear model, the theoretical temperature dependency relation of the Wheatstone bridge type sensor zero position can be deduced, and the zero position temperature drift distance of the Wheatstone bridge type sensor at any temperature can be estimated. Data support is provided for calibration of the Wheatstone bridge type sensor, and the calibration precision of the Wheatstone bridge type sensor is improved. The quasi-linear model provides a clear physical image for explaining the reason of the zero-position temperature drift of the Wheatstone bridge type sensor, and is beneficial to understanding the reason of the temperature drift of the Wheatstone bridge type sensor. The quasi-linear model is suitable for Wheatstone bridge type magnetoresistive sensors, weighing elements adopting Wheatstone bridge structures, temperature sensors, electric field sensors and other Wheatstone bridge structure sensors.

Description

technical field [0001] The present application relates to the technical field of zero calibration of sensors, in particular to a method for estimating zero temperature drift of a Wheatstone bridge sensor. Background technique [0002] The Wheatstone bridge is a detection circuit, although its structure is simple, its accuracy and sensitivity are relatively high, and it is widely used in detection instruments. The measurement sensitivity of the Wheatstone bridge is of great significance in scientific research and production applications. [0003] The Wheatstone bridge structure is widely used in various sensors including magnetoresistive sensors. The Wheatstone bridge structure achieves better sensitivity and linearity than any other structure consisting of the same elements. Wheatstone bridge magnetoresistive sensors are widely used in industrial automation, automobile industry, aviation industry, instrumentation and space science research and other fields. Before applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D3/036G01D18/00
CPCG01D3/036G01D18/00
Inventor 于向前宗秋刚肖池阶刘斯曲亚楠陈鸿飞邹鸿施伟红王永福陈傲宋思宇高爽邵思霈
Owner PEKING UNIV
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