Cable sheath tensile length measuring device and cable sheath tensile length measuring method based on machine vision

Abstract

The invention relates to a cable sheath tensile length measuring device and a cable sheath tensile length measuring method based on machine vision. The measuring device comprises a tension sensor, a tension transmission mechanism, and a servo motor, and is characterized by further comprising an upper computer, an embedded controller, and an industrial camera, wherein the embedded controller, the industrial camera, the tension sensor, the tension transmission mechanism and the servo motor constitute a lower computer. The embedded controller comprises a touch screen display module, a tension sensor processing module, a camera image processing module, a data processing module, and an upper computer communication module, wherein the input end of the touch screen display module, the output end of the camera image processing module and the input end of the upper computer communication module are connected with the data processing module, the data processing module is connected with the tension sensor through the tension sensor processing module, the input end of the camera image processing module is connected with the industrial camera through a USB cable, and the upper computer communication module is connected with the upper computer through a network cable.

Description

technical field [0001] The invention relates to the technical field of a device for measuring mechanical parameters of materials, in particular to a device and method for measuring the tensile length of a cable sheath based on machine vision. Background technique [0002] As one of the main energy sources in today's society, electricity has penetrated into all aspects of our production and life, and the problem of electricity safety has also followed. As the first line of defense for people's electricity safety, the cable sheath plays a vital role. A cable jacket is an insulating rubber sheath that wraps around a metal wire. If the quality of the cable sheath is not good enough, it will be damaged and deformed within the service life or within the specified maximum external force, resulting in leakage, which will cause electric shock or fire, which will bring huge losses to the lives and property of the masses. Therefore, the performance guarantee of the cable sheath is ve...

AI Technical Summary

Problems solved by technology

This will cause congenital indentation on the tested material, causing most of the tested material to break at the indentation during the experiment, which does not meet the national requirements for the cable sheath tensile test test, and needs to be repeated many times to obtain a relatively satisfactory test. The data, the experimental efficiency is poor, and the experimental data is not accurate enough

Using a vernier caliper to manually measure the tensile length of the material to be tested when it breaks, it is difficult and inaccurate to judge the breakage time of the cable sheath manually. It is relatively large and inefficient. The test data is recorded in writing, and the original data recording takes a long time. The tensile strength and elongation at break are calculated by a manual calculator, which is inefficient

If the traditional tensile testing machine is directly discarded to develop a new tensile testing machine, the development cost will be high and the development cycle will be long. The utilization rate of the motor drive of the traditional tensile testing machine will be poor, resulting in waste of raw materials, which does not meet the principle of resource conservation and full recycling.

[0004] For example, the electronic tensile testing machine designed by Xie Suzhuan et al. It can only measure the tensile force of the tested material and cannot measure the stretched length of the tested material

Bian Ji (Bian Ji. Practical micro-controlled electronic tensile machine [J]. China Rubber, 2003 (9): 26-27.) The practical micro-controlled electronic tensile machine designed uses an encoder to measure the tension of the tested material. Elongation, you need to install tracking clips on the material to be tested, which will affect the measurement of tension

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