Experiment system for measuring Young's elastic modulus by using linear array CCD imaging method

Abstract

The invention discloses an experiment system for measuring Young's elastic modulus by using a linear array CCD imaging method. The experiment system is characterized by comprising a detected material,a support, a counterweight, a flake, a linear array CCD, an auxiliary illumination light source, a signal acquisition and processing device, an imaging lens, and a stabilization apparatus. The lens imaging is used for amplifying a marked line on the detected sample and imaging the marked line to the linear array CCD, the computer is employed for processing an image signal of the linear array CCD,so that change of the marked line position when the sample is stressed can be obtained, and the Young's elastic modulus of the material can be calculated. The experiment system has the advantages ofnon contacting, simple structure, and convenient adjustment.

Description

technical field [0001] The invention relates to the field of optical experiments, in particular to an experimental system for measuring Young's modulus of elasticity by using a linear array CCD imaging method. Background technique [0002] Young's modulus of elasticity is an important physical quantity describing the ability of solid materials to resist deformation. Measurements are very important. [0003] There are many ways to measure Young's modulus of elasticity, the most common one is to measure with a mirror ruler group combined with an optical lever. This method is difficult to adjust, and there are many indirect measurements, which are likely to cause large errors. [0004] In the experimental research, it is also proposed to use laser levers, capacitors, Loe mirrors, Michelson interferometers, wedge interference, area array CCD image sensors, differential transformers, reading microscopes, optical fiber displacement sensors and other devices or means to measure Ya...

AI Technical Summary

Problems solved by technology

[0003] There are many ways to measure Young’s modulus of elasticity. The most common method is to measure with a mirror ruler group combined with an optical lever. This method is difficult to adjust, and there are many indirect measurements, which are likely to cause large errors.

[0004] In the experimental research, it is also proposed to use laser levers, capacitors, Loe mirrors, Michelson interferometers, wedge interference, area array CCD image sensors, differential transformers, reading microscopes, optical fiber displacement sensors and other devices or means to measure Yang These methods have certain disadvantages in terms of measurement accuracy, system complexity, ease of operation and cost.

[0005] When the most commonly used optical lever is used for measurement, the measurement process is cumbersome. Because the optical lever is very sensitive to vibration, it is also very laborious to adjust the scale and telescope in the device. It requires lightness, stability, and slowness, and the experimental operation is quite troublesome.

[0006] Using area array CCD, Michelson interferometer, Loe mirror and other methods to measure the structure is too complicated and the cost is high

[0007] When using fiber optic sensors to measure, it generally requires fine-tuning of the sensor up, down, left, and right, with fine structure, high cost, and difficult adjustment

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