Accelerometer temperature compensation method

An acceleration sensor and temperature compensation technology, which is applied in the direction of using inertial force to measure acceleration and reduce unwanted effects, can solve the problems of cumbersome least squares method and ill-conditioned matrix, so as to improve calculation accuracy, good real-time performance, The effect of expanding the scope of application

Inactive Publication Date: 2018-12-11
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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The least squares method is cumbersome, and sometimes whe...

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[0033] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0034] Such as figure 1 As shown, a kind of acceleration sensor temperature compensation method is provided, and the main idea of ​​this method is: set the input (acceleration standard value) of the acceleration sensor, that is, the target parameter as x, the temperature of the environmental influence factor as t, and the output as y (acceleration measurement value), obviously y=f(x, t) is a nonlinear relationship, the sensor output y and temperature t are used as the input samples of the particle swarm PSO-SVM support vector machine model, after being processed by the particle swarm PSO-SVM support vector machine model The output acceleration value h is the target parameter x after eliminating the influence of tempera...

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Abstract

The invention discloses an accelerometer temperature compensation method, and relates to the technical field of sensor soft compensation. The method comprises the following steps that in different acceleration environments, acceleration values sensed by an accelerometer in the different temperature conditions in each acceleration environment are selected as sample data; a particle swarm algorithmis used to optimize a parameter of a support vector machine to obtain an optimal parameter, and the optimal parameter is to establish an optimal nonlinear support vector machine; and the optimal nonlinear support vector machine is used to predict the sample data, a nonlinear compensation model is established via the support vector machine of a PSO-SVM particle swarm regression machine, and the test accelerations of the accelerometer at different temperatures are compensated nonlinearly. The calculating accuracy is improved, the instantaneity is high, and the speed measuring application range of the accelerometers is widened greatly.

Description

technical field [0001] The invention belongs to the technical field of sensor soft compensation, and in particular relates to a method for temperature compensation of an acceleration sensor. Background technique [0002] With the improvement of modern industry and automation, dynamic testing and real-time automatic detection have become the inevitable trend of development. Accurate measurement of vibration and shock is very important for dynamic testing. Piezoelectric acceleration sensors have the advantages of good dynamic response, wide measurement range and high sensitivity. They are often used in dynamic measurement and control systems to obtain vibration and shock signals. However, in practical applications, since the sensitive element does not convert non-electrical signals into electrical signals in a linear relationship, the characteristic function of the acceleration sensor is not a linear function either. On the other hand, due to the change of the internal enviro...

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Application Information

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IPC IPC(8): G01P15/09G01P15/08G01D3/028
Inventor 杨舟蒋雯倩李刚唐利涛黄富凡何艺梁捷颜丹丹
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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