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Correction method and device for sensor characteristic curve, equipment and storage medium

A sensor characteristic and sensor technology, applied in the sensor field, can solve the problems of affecting sensor calibration and low accuracy.

Active Publication Date: 2019-01-01
SHENZHEN YIHUA COMP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method only roughly determines the linear interval, and the accuracy is not high, which may affect the calibration of the sensor

Method used

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  • Correction method and device for sensor characteristic curve, equipment and storage medium
  • Correction method and device for sensor characteristic curve, equipment and storage medium
  • Correction method and device for sensor characteristic curve, equipment and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 It is a flow chart of the correction method of the sensor characteristic curve provided by Embodiment 1 of the present invention. This embodiment can be applied to the situation of determining the start and end points (including the starting point and the cut-off point) of the linear interval of the sensor characteristic curve and correcting the sensor characteristic curve. The method can be carried out by means for correcting the sensor characteristic curve, for example a device with processing and calculation functions. Such as figure 1 As shown, the method specifically includes the following steps:

[0030] Step 110, acquiring sample point data of the sensor.

[0031] Among them, the input value of the sensor and its corresponding output value can be obtained by testing the sensor, and the input value (corresponding to the X coordinate) and its corresponding output value (corresponding to the Y coordinate) constitute a point in the coordinate system, and t...

Embodiment approach

[0041] On the basis of the first embodiment above, this embodiment provides a preferred implementation manner of determining the start and end points of the linear interval in step 130, including the following steps:

[0042] (1) Calculate the deviation between the current sample point and the fitted straight line.

[0043] Preferably, the following formula can be used to calculate the deviation D between the sample point and the fitted straight line: D=|kx i +b-y i |, where, the fitting straight line equation is y=kx+b, k and b are both constants of the straight line, k≠0; the coordinates of the sample point i are (x i ,y i ).

[0044] (2) Judging whether the above deviation is smaller than a preset threshold.

[0045] (3) If the above deviation is smaller than the preset threshold, acquire a first preset number of sample points on the preset side of the current sample point in a preset order.

[0046]Wherein, the preset side can be the left side or the right side, which...

Embodiment 3

[0053] On the basis of the first and second embodiments above, this embodiment provides a preferred implementation manner of determining the fitted straight line according to the sample point data in step 120, and the fitting accuracy is relatively high. Specifically include the following steps:

[0054] (1) Extract sample points whose ordinate value is less than the median value in the sample point data.

[0055] Wherein, the median may be the median of the Y-axis values ​​of the sample points. Based on the characteristics that the characteristic data of the sensor is high first and then low, and the stable interval is the low numerical interval, this step can exclude the points in the undesired interval.

[0056] (2) Segment the extracted sample points.

[0057] Among them, the sample points can be segmented according to the X-axis data, because the change of the Y-axis data in the linear space is too small to be distinguished. The extracted sample points may be segmented...

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Abstract

The invention discloses a correction method and device for a sensor characteristic curve, equipment and a storage medium. The method includes the following steps: obtaining sample point data of a sensor; determining a fitting straight line according to the sample point data; determining a starting point and a cut-off point of a linear interval of the sensor characteristic curve according to a deviation and a preset threshold of a current sample point and the fitting straight line and according to a preset sequence; and correcting the fitting straight line according to the sample point betweenthe starting point and the cut-off point to obtain a corrected sensor characteristic curve. The correction method and device can ensure the accuracy of the determined starting and cut-off points, andthen the characteristic curve is corrected according to the starting and cut-off points, and the corrected characteristic curve can more accurately represent sensor characteristics and provides more accurate reference data for sensor calibration.

Description

technical field [0001] Embodiments of the present invention relate to sensor technology, and in particular to a correction method, device, equipment and storage medium of a sensor characteristic curve. Background technique [0002] As a detection device, the sensor can obtain the measured information and convert it into electrical signals or other required forms of information output according to certain rules, so as to meet the requirements of information transmission, processing, storage, display, recording and control. . The static characteristics of the sensor can be described by an algebraic equation without time variables, or by a characteristic curve drawn with the input quantity as the abscissa and the corresponding output quantity as the ordinate. The main parameters that characterize the static characteristics of the sensor are: linearity, sensitivity, resolution and hysteresis. [0003] Under normal circumstances, the actual static characteristic output of the s...

Claims

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Application Information

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IPC IPC(8): G01D18/00
CPCG01D18/00
Inventor 李杰
Owner SHENZHEN YIHUA COMP
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