Automatic zero point tracking algorithm against zero drift of sensor

A tracking algorithm and sensor technology, which is applied in the field of sensor calibration, can solve problems that affect the accuracy of wheel axle identifiers and rarely track zero points, and achieve the effects of accurate identification, elimination of influence, and optimized performance

Inactive Publication Date: 2019-04-16
郑州衡量科技股份有限公司
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Problems solved by technology

[0002] During the use of the piezoelectric wheel axle identifier, due to the influence of temperature changes, unstable power supply voltage and other factors, it is inevitable that "zero drift" will occur, which will affect the accuracy of the wheel axle identifier
In the existing technology, after the zero drift occurs, the cause of the zero drift can be quickly found out, and a method to suppress the zero drift can be found. However, there are few methods in the prior art that can automatically track the zero point

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  • Automatic zero point tracking algorithm against zero drift of sensor

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Embodiment Construction

[0008] The technical solutions of the present invention will be described in further detail below through specific implementation methods.

[0009] as attached figure 1 As shown, an automatic zero point tracking algorithm for suppressing sensor zero drift includes the following steps:

[0010] Step 1, collect the real-time AD value of the piezoelectric sensor with pressure point structure and perform data processing, and judge the current state of the piezoelectric sensor as a loading state or an idle state;

[0011] Step 2, judging whether the duration of the current state of the piezoelectric sensor exceeds a predetermined time value;

[0012] Step 3, if the duration of the current state exceeds the predetermined time value, trigger the zero point tracking program, calculate the current zero point value, correct and store it, otherwise return to step 1.

[0013] The invention can realize the self-adaptation of the zero point drift, automatically start the zero point tracki...

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Abstract

The invention provides an automatic zero point tracking algorithm against zero drift of a sensor. The algorithm comprises the following steps that 1) an AD value of a piezoelectric sensor of a piezoelectric structure is collected and processed to determined a present state of the piezoelectric sensor; 2) whether duration of the present state of the piezoelectric sensor exceeds a preset time valueis determined; and 3) if YES, a zero point tracking program is triggered, the present zero point value is calculated, corrected and stored, and otherwise, the step 1 is returned to. Thus, zero drift is adapted to, the zero point tracking program is started automatically, influence of zero drift on sensor discrimination is eliminated, and further, a wheel shaft can be identified accurately, and performance of the piezoelectric sensor is optimized.

Description

technical field [0001] The invention relates to the field of sensor calibration, in particular to an automatic zero point tracking algorithm for suppressing sensor zero drift. Background technique [0002] During the use of the piezoelectric wheel axle identifier, due to the influence of temperature changes, unstable power supply voltage and other factors, it is inevitable that "zero drift" will occur, which will affect the accuracy of the wheel axle identifier. In the prior art, after the zero drift occurs, the cause of the zero drift can be quickly found out, and a method to suppress the zero drift can be found. However, there are few methods in the prior art that can automatically track the zero point. [0003] In order to solve the above existing problems, people have been seeking an ideal technical solution. Contents of the invention [0004] The purpose of the present invention is to address the deficiencies of the prior art, thereby providing an automatic zero poin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D18/00
CPCG01D18/00
Inventor 楚银龙
Owner 郑州衡量科技股份有限公司
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