Method and system for testing gap values of workpieces on basis of laser light

Abstract

The invention discloses a method and a system for testing gap values of workpieces on the basis of laser light. The method includes a process for determining gaps with jump and a process for determining gaps without jump. The process for determining the gaps with the jump includes that whether three continuous planes are available in two-dimensional contour data measured by laser line scanning sensors or not is judged by the aid of gap determination parameters, the middle plane is positioned below the left plane and the right plane, the gaps with the jump are reserved in objects if the three continuous planes are available in the two-dimensional contour data, and the sizes of the gaps are equal to a length value, namely, an absolute value of a difference value of X-axis numerical values ofan intersection B1 of the first plane and the second plane and an intersection C1 of the second plane and the third plane, of the middle plane in the contour data. The process for determining the gaps without the jump includes carrying out point-by-point comparison to judge whether X-axis numerical values of every two adjacent points are larger than gap distance determination parameters or not; determining that the gaps without the jump are reserved in the tested objects if the distance D between every two adjacent points is larger than the gap determination parameters. The gaps without the jump are larger than or equal to the distances D. The method and the system have the advantage that the problems of lower measurement accuracy and insufficient automatic judgment ability of gap measurement at present can be solved by the aid of the method and the system.

Description

technical field [0001] The invention belongs to the technical field of test and measurement, and in particular relates to a method and system for testing the gap value of workpieces based on laser. Background technique [0002] For the detection of workpiece gaps, the traditional method is to use calipers and feeler gauges for manual testing. During the test, observe with the naked eye whether there is a gap in the shape of the workpiece or the splicing part, and then select a combination of caliper and feeler gauge that meets the test range and measurement accuracy by observing the approximate size of the gap. This test method has complicated test steps, low test efficiency, and consumes a lot of manpower in the test process. The test results have a large human error. Moreover, the caliper and feeler gauge are easy to wear the workpiece under test during the test, which cannot meet the non-destructive and rapid measurement of the gap. [0003] Among various new test meth...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method and system for measuring the gap value of workpieces based on laser. The method is used to solve the problems of low measurement accuracy and insufficient automatic judgment ability existing in the existing gap measurement

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