Mobile moire interferometer

Abstract

The invention relates to a mobile moire interferometer, comprising a laser, a light path reflecting lens, a beam expanding lens, a collimating lens, a U-V field separation device and an image acquisition device, wherein the entire interferometer is divided into a main light path mobile platform and an image acquisition mobile platform, the U-V field separation device has the function of plus and minus 90 degree rotation, and the displacement field of the orthogonal grating of a measured piece in a non-vertical or non-horizontal direction can be measured; the interferometer has compact structure, convenient mobilization and favorable damping property; and provided with a high power laser, the interferometer can be matched with a large scale testing machine to use, and can meet the requirements of high temperature mechanics test and on-site field measurement.

Description

technical field [0001] The invention relates to a mechanical testing instrument, in particular to a mobile moiré interferometer. Background technique [0002] In mechanical testing, the use of moiré interferometry to measure the change of the displacement field in the plane has been widely used at home and abroad, and many practical problems have been successfully solved. However, most of the original measurement methods and equipment are bulk structures built on the laboratory vibration isolation platform, and the shockproof function of the platform can be better guaranteed. But because it is inconvenient to move, it is inconvenient to be used with large-scale testing machines, and it is also difficult to solve engineering site problems. In recent years, some mobile laser measuring instruments or systems have been launched at home and abroad, such as the systems or equipment provided by Chinese Patent No.: 200410000005.0, 200510027941.5, and 200510025444.1. They can solve ...

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Problems solved by technology

However, because it is not easy to move, it is inconvenient to use with large testing machines, and it is also difficult to solve engineering site problems.

In recent years, some mobile laser measuring instruments or systems have been launched at home and abroad, such as the systems or equipment provided by Chinese Patent No.: 200410000005.0, 200510027941.5, and 200510025444.1. They can solve some practical problems, but there are also some limitations, such as these Most of the systems or instruments only measure the fixed horizontal or plumb direction displacement field (U-V field) in the vertical plane or add a displacement field with an angle of 45° for mechanical measurement, but they cannot complete the general azimuthal crack displacement field measurement. Measurement, and some instruments are limited by the power of the laser source, and it is difficult to complete the mechanical measurement in the high-temperature environment with a large light field

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