High-precision circular contour dimension measurement algorithm based on non-uniform discrete data

A technology of discrete data and circular contours, applied in the field of signal processing, can solve problems such as inability to meet measurement requirements, and achieve the effect of improving dimensional measurement accuracy

Active Publication Date: 2022-06-24
RES INST OF NUCLEAR POWER OPERATION +1
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Problems solved by technology

Conventional signal processing algorithms have been unable to meet the measurement requirements of such workpieces

Method used

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  • High-precision circular contour dimension measurement algorithm based on non-uniform discrete data
  • High-precision circular contour dimension measurement algorithm based on non-uniform discrete data
  • High-precision circular contour dimension measurement algorithm based on non-uniform discrete data

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Embodiment Construction

[0056] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0057] The invention is a high-precision circular contour size measurement algorithm based on non-uniform discrete data, which locates the circle center position of the inspected workpiece under the premise of not changing the measurement principle and measuring equipment, thereby calculating the high-precision circular contour size.

[0058] A high-precision circular contour size measurement algorithm based on non-uniform discrete data, which specifically includes the following steps:

[0059] Step 1: Calculate the theoretical value rat of the ratio of the circular area of ​​the workpiece to the circumferential phase angle.

[0060] For example, the range from 0° to 270° is a circular area, then rat=0.75;

[0061] Step 2: Calibrate the rotation radius rr of the conventional measurement system

[0062] Step 2.1. Design and make a comp...

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Abstract

The invention discloses a high-precision circular contour dimension measurement algorithm based on non-uniform discrete data, and aims to realize circle center positioning of partial circular contour and improve dimension measurement precision of the circular contour. Comprising the following steps: step 1, calculating a theoretical value rat of a ratio of a circular area of a detected workpiece on a circumferential phase angle; 2, calibrating the rotation radius rr of the conventional measurement system; step 3, positioning the center of circle position CCE of the detected workpiece; and step 4, calculating the overall dimension radius R at any phase angle. The method has the remarkable effects that under the premise that an original measuring system is not changed, circle center positioning of part of the circular contour is achieved, and the size measuring precision of the circular contour is improved.

Description

technical field [0001] The invention belongs to the field of signal processing, and in particular relates to a high-precision circular contour size measurement algorithm based on non-uniform discrete data. Background technique [0002] In modern industry, the high-speed acquisition method of distance sensor is often used to collect the outline size of the circular inspected workpiece. The principle is to use the circumferential motion equipment to drive the distance sensor or the circular workpiece to be inspected, so that the two have relative circumferential motion, and the radius of the motion path is R; in this process, the sensor uniformly collects the distance between the two. d. When the center of the circumferential motion path coincides with the center of the workpiece to be inspected, the contour of the workpiece to be inspected can be obtained to calculate the diameter of the contour, such as figure 1 shown. For the measurement of the inner diameter of the workp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/20G06F17/10
CPCG01B21/20G06F17/10Y02P90/30
Inventor 张益成李树鹏廖思宇
Owner RES INST OF NUCLEAR POWER OPERATION
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