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Sensor nonlinear compensation method

A nonlinear compensation and sensor technology, which is applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve the problems of reducing the accuracy of prediction results and the difficulty of ensuring model prediction accuracy, etc., to achieve improved calculation accuracy and good real-time performance , the effect of expanding the scope of application

Inactive Publication Date: 2018-10-30
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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Problems solved by technology

In the actual use of the model, these three parameters are usually empirical values, and it is difficult to guarantee the prediction accuracy of the model under different types of data
Once the parameters are selected improperly, the accuracy of the prediction results will be greatly reduced.

Method used

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Embodiment Construction

[0041] 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.

[0042] Such as figure 1 As shown, a nonlinear compensation method of a sensor is provided, and the main idea of ​​the method is as follows: set the input of the platinum resistance sensor as x, the output as y, and y=f(x) is a nonlinear relationship, if the platinum resistance sensor A compensation link is connected in series after the sensor, and the inverse function of y=f(x) can be obtained by using the BA-SVM support vector machine, then the nonlinear compensation of the platinum resistance sensor is realized. In order to simplify the operation, this embodiment uses the SVM support vector machine to take the resistance value of the temperature sensor experimental simulation as input, and the standard temperature va...

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Abstract

The invention relates to the technical field of sensor software compensation and specifically discloses a sensor nonlinear compensation method. The method comprises the steps of selecting resistance values corresponding to a plurality of pieces of temperature sensed by platinum resistor in a certain temperature interval as sample data; optimizing parameters of a support vector machine through adoption of a bat algorithm, thereby obtaining the optimum parameters, and establishing the optimum nonlinear support vector machine through adoption of the optimum parameters; and predicting the sample data through utilization of the optimum nonlinear support vector machine. According to the method, a nonlinear compensation model is established through application of a bat algorithm (BA-SVM) supportvector machine, so the platinum resistor nonlinear compensation method is realized. Nonlinear characteristics of a platinum resistor sensor is compensated. A compensated system can be processed according to linear characteristics. The computing accuracy is improved. The timeliness is good. An platinum thermistor temperature measurement application range is greatly expanded.

Description

technical field [0001] The invention belongs to the technical field of sensor soft compensation, in particular to a nonlinear compensation method of a sensor. Background technique [0002] As a temperature measurement sensor, platinum resistance thermometer has the advantages of large measurement range, good stability, high reproducibility of indication value and oxidation resistance, etc., and is often used as an international standard thermometer. It is due to the material, manufacturing process, packaging structure and other factors, as well as the nonlinearity of the platinum resistor itself and the nonlinearity of the unbalanced bridge, etc., which will bring errors to the measurement. If the error problem is not solved, the advantages of high precision and high sensitivity of platinum resistance thermometers cannot be realized, and even the feasibility and reliability of the entire system will be affected. Therefore, it is necessary to study the calibration method of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 杨舟李刚蒋雯倩唐利涛龙东黄富凡
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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