High-speed strain testing apparatus and high-speed strain testing method based on line scan camera

Abstract

The present invention discloses a high-speed strain testing apparatus and a high-speed strain testing method based on a line scan camera. The apparatus comprises a high speed tension testing machine, a light source, a line scan camera and a computer, wherein the high speed tension testing machine is used for loading a sample to be tested and making the sample to be tested produce tension deformation at a high speed, the sample to be tested is positioned at the upper portion, the middle portion pr the lower portion of the high speed tension testing machine, the light source is arranged at a position capable of irradiating the sample to be tested, the lens of the line scan camera is toward the sample to be tested, and the high speed tension testing machine and the line scan camera are connected to the computer respectively through signal lines. The method comprises: loading a sample to be tested into the high speed tension testing machine, adjusting the line scan camera and the light source, carrying out calibration on the line scan camera, collecting the video images of the sample to be tested from the tension to the breaking, and processing the collected video images to finally obtain a strain-time curve. According to the present invention, the high-speed strain testing apparatus has characteristics of simple structure, easy operation and wide application material range, and can be widely used for material strain testing.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows us to study samples under very small conditions quickly while also being able to measure their properties accurately over large sections without causing damage from external influences such as heat sources like lasers or electrical currents.

Problems solved by technology

This patents describes various technical problem addressed during researches related to mechanics and physical characteristics of materials subjected to rapid changes or shock loading environments like cars collision simulations. Existing measurement techniques require long time periods before reaching their full potential usefulness due to poor response times caused by fast acceleration processes. To address this issue, new tools called laser stretching machines were developed based upon specific experimental measurements conducted over several hours. These instruments provide faster measuring capabilities than existing ones while also being costly less sensitive and more reliable.

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