Unlock instant, AI-driven research and patent intelligence for your innovation.

A detection method applicable to linear displacement or angular position of objects

A linear displacement and detection method technology, applied in the direction of using electrical devices, measuring devices, using electromagnetic means, etc., can solve problems such as detection errors

Active Publication Date: 2022-03-04
XIAN RAILWAY SIGNAL +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, due to changes in the magnetic field, external interference and other factors, the output signal value of the detection unit may affect the detection results. If there is no relative displacement in the detection direction between the measured part and the detection unit, but the distance changes, the magnetic field will change. , resulting in a change in the value of the output signal. If the detection method is sensitive to the value, a detection error will occur. As in the above case, there is no relative motion, but the detection result will appear motion

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A detection method applicable to linear displacement or angular position of objects
  • A detection method applicable to linear displacement or angular position of objects
  • A detection method applicable to linear displacement or angular position of objects

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as figure 1 and figure 2As shown, the present invention relates to a detection method that can be applied to the linear displacement or angular position of an object, and is characterized in that it includes: a data acquisition processing unit and a detection unit, and the phase angle of the output signal in the detection period of the detection unit is related to the linear displacement of the measured part Or the signal of the measured part proportional to the rotation angle. When the measured part has a specified displacement or rotation relative to the detection unit, the detection unit outputs a sine signal and a cosine signal. In one cycle, the phase angle of the sine and cosine signals and the relative displacement or The rotation angle is proportional to:

[0049] The steps include: the detection unit detects the object to be detected, and the sine and cosine signals are given as voltage signals, the maximum amplitude is max V, the minimum amplitude is 0V...

Embodiment 2

[0074] The signal processing in this embodiment is the same as that in Embodiment 1, but the construction function is different. The construction F(θ)=θ, H(θ)=N×tanθ, the value of N is related to the measurement accuracy, and the phase angle changes from zero to When it reaches π / 4, the corresponding displacement is L / 8, and the corresponding rotation angle is T / 8. If the displacement detection accuracy is ΔS, or the angle detection accuracy is ΔT, considering the linear change, the value of N should satisfy or, in fact, there is nonlinearity In this case, the value of N needs to be increased. When 0≤x≤π / 4, H(x) is discretized into an arithmetic sequence B, the number of items is N, the tolerance is 1, the first item b1=D, 0≤D≤ 1. The general term of the sequence B is expressed as bn=b1+(n-1), and the corresponding F(x) discrete sequence is A, an=arctan(bn / N),

[0075] Similarly, calculate the tangent value of θt by calculating the sampling value of the sine and cosine channel...

Embodiment 3

[0089] The signal processing in this embodiment is the same as that in Embodiment 1, and the construction function is similar to that in Embodiment 2. The structure F(θ)=θ, H(θ)=N×tanθ, the difference from Embodiment 2 is that H(θ ) The discretized sequence B is an integer arithmetic sequence, the tolerance is 1, the first item b1=0 or b1=1, and the general term of the F(θ) discretized sequence A is an=arctan(bn / N).

[0090] The method to obtain F(θt) from tanθt is to round N×tanθt to an integer and record it as INT(N×tanθt), then INT(N×tanθt)=bk, and assign k items of sequence A to F(θt ), that is, F(θt)=ak. All the other is the same as embodiment 1 or embodiment 2, no longer detailed description.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a detection method which can be applied to the linear displacement or angular position of an object. In the present invention, the accuracy of position detection is determined by the difference of the terms of the discretized sequence, and the relevant features of the discretized sequence can be determined according to the required accuracy. , such as item difference, number of items, etc. In the present invention, when the object to be measured and the detection unit undergo relative displacement or relative rotation, the detection unit outputs cosine and sine signals, and the phase angle of the signal in a cycle is proportional to the displacement or rotation angle, through Create constructors F(x) and H(x), F(x)∝x and have F(x+kπ / 4)=F(x)+k×F(π / 4), H(x)∝tanx , discretize F(x) and H(x) in x∈[0,π / 4] and correspond one-to-one, F(x) is discretized as sequence A, and H(x) is discretized as sequence B , when the number of terms is N, let F(π / 4)=aN, H(π / 4)=bN.

Description

technical field [0001] The present invention relates to a detection method applicable to the linear displacement or rotation angle position of an object, specifically a position detection method based on the phase angle of an output signal within a cycle being proportional to the linear displacement or rotation angle of a measured part. Background technique [0002] Using the non-contact method to detect the movement of moving parts has the advantage of having little impact on the parts to be detected. At present, the non-contact detection method is widely used. [0003] Attach a magnetic scale on the surface of the part, and fix the detection unit at a specified distance from the magnetic scale. When the magnetic scale moves relative to the detection unit in the specified direction, the detection unit will output an electrical signal. The currently known detection unit follows As the relative displacement increases, basically one sine voltage signal and one cosine voltage s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/02G01B7/30
CPCG01B7/02G01B7/30
Inventor 黄晨涛丁召荣谢明军李渊秦高强马振人唐一鸣
Owner XIAN RAILWAY SIGNAL