Stress measuring method based on dynamic photoelastic system
A dynamic photoelasticity and stress measurement technology, applied in the field of acoustics, can solve problems such as complex operation, and achieve the effect of simple equipment and convenient operation
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[0021] The present invention will be further described below through the accompanying drawings and specific embodiments, but it should be understood that these embodiments are only used for more detailed description, and should not be construed as limiting the present invention in any form, that is, not intended To limit the protection scope of the present invention.
[0022] In one embodiment, the stress measurement method of the present invention can quickly obtain the absolute stress value. It uses a dynamic photoelastic system to first perform dark field imaging, bright field imaging, and dark field compensation field imaging on the internal sound field of the sample, and The light intensity values at the stress measuring points are obtained respectively; then the phase difference is obtained according to the light intensity values obtained under the three conditions; finally, the absolute stress value can be obtained through the relationship between the phase differenc...
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