Lever type laser detection device for material tension

Abstract

The invention discloses a lever type laser detection device for material tension. The lever type laser detection device comprises a support frame and laser detection assemblies, wherein at least two groups of laser detection assemblies are arranged in parallel along the tensile direction of a test piece; staff gauges for reading laser line corners are correspondingly arranged on laser transmission lines of lasers of the laser detection assemblies; and a gauge length setting fork is arranged on the support frame. According to the lever type laser detection device disclosed by the invention, a structure with a plurality of lasers is arranged on the test piece and is twisted for a certain angle along the tension of the test piece; the deflection angle of the transmitted laser light path is read by the staff gauge; and material tensile strain multipoint data are obtained according to respective reading of each laser and the material tensile Hooke's law is verified. Therefore, the lever type laser detection device can be used for testing multiple points of the test piece; the test process is direct-viewed and open, thus the test process and the change of parameters can be clearly seen by people on the scene and the lever type laser detection device is suitable for classroom teaching and testing. The invention has the advantages of simple structure, easiness for disassembly, assembly and operation and lower test cost compared with that of equipment in the prior art.

Description

technical field [0001] The invention relates to teaching experiment equipment, in particular to a laser detection device for material tensile strain detection. Background technique [0002] In the material mechanics experiment, in order to measure the deformation of the test piece within the proportional limit, special instruments with high sensitivity and precision are needed. Existing instruments and equipment generally include mechanical, electronic and optical structures, all of which have the disadvantages of small working space and small viewing window, such as dial gauges, millivoltmeters, and monocular telescopes, which can only be used by a single person. Read, other personnel involved in the detection passively accept, thus affecting the learning effect. [0003] At the same time, the existing stretching equipment has the characteristics of large size and high noise, while the detection equipment of the prior art must be installed in the stretching equipment to re...

AI Technical Summary

Problems solved by technology

Existing instruments and equipment generally include mechanical, electronic and optical structures, all of which have the disadvantages of small working space and small viewing window, such as dial gauges, millivoltmeters, and monocular telescopes, which can only be used by a single person. Read, other participants in the test passively accept, thus affecting the learning effect

[0003] At the same time, the existing stretching equipment has the characteristics of large size and high noise, while the detection equipment of the prior art must be installed in the stretching equipment to read nearby. Due to the large noise, it is not conducive to on-site teaching, and There are also some auxiliary equipment such as wires arranged on site, which is not conducive to group on-site teaching; as for remote observation equipment such as telescopes, which are affected by light and are easily disturbed by the outside world, they are suitable for single-person operation and not suitable for group teaching.

Moreover, the structure and use of the above-mentioned detection equipment are relatively complicated, and only one standard moment of the specimen can be tested during the experiment, which has limitations.

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