Pressure measurement system with photo-elasticity pressure sensor

Abstract

The invention relates to the field of pressure measurement, in particular to a pressure measurement system with a photo-elasticity pressure sensor. The pressure measurement system comprises the photo-elasticity pressure sensor and a data collection operation platform opposite to the photo-elasticity pressure sensor in position. The distance between the photo-elasticity pressure sensor and the data collection platform is adjustable. The photo-elasticity pressure sensor comprises an external circular ring, a curved-surface cushioning bock and a test piece, wherein the curved-surface cushioning block and the test piece are arranged inside the circular ring. A cambered surface protruding block bent downwards is arranged on the upper portion of the inner side of the circular ring, the lower portion of the inner side of the circular ring is a platform, the curved-surface cushioning block is located on the upper portion inside the circular ring, the test piece is located on the lower portion inside the circular ring, and the curved-surface cushioning block and the test piece are located on the vertical symmetry axis of the circular ring. The photo-elasticity material test piece serves as a core component, in this way, influences from the environment are small, long-term stress monitoring can be performed, the core component can be replaced, and then the range of the sensor is changeable.

Description

technical field [0001] The invention relates to the field of pressure measurement, in particular to a pressure measurement system using a photoelastic pressure sensor. Background technique [0002] Nowadays, the core components of pressure sensors are mostly strain gauges and piezoelectric materials. This kind of sensor is greatly affected by the environment and is not suitable for long-term monitoring of force, and the core components in the sensor cannot be replaced. [0003] Photoelasticity is an experimental technique that combines optics and mechanics for stress analysis. Put a transparent material with birefringence effect in a polarized light field, and when a load is applied to it, you can see the resulting interference fringe pattern. By measuring this interference fringe and calculating it, the stress of the material under load can be determined. In mining and civil engineering, photoelastic sensors for measuring rock mass stress can be used to measure stress cau...

AI Technical Summary

Problems solved by technology

However, it places the photoelastic material directly inside the structure, which is easy to cause damage to the sensor and affects its long-term monitoring of the structure.

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