Vacuum laser dam deformation measuring method

Abstract

The invention is a measuring method for vacuum laser dam deformation, which belongs to optical, photo-sensing and geometric position measurement field. The character lies in: there sets a two-dimension position adjusting mechanism between the measuring base and the wave zone plate, when measuring, the invention adjusts the position of wave zone board relative to the measuring base through the adjusting mechanism, makes the laser focus around the centre of the laser receiver, the invention calculates the shift of the measuring point according to the shift of the wave zone plate relative to the measuring point base and the bias of the light-spot on the laser receiver. The invention reduces the diameter of the vacuum channel on the receiving end, at the same time; it also reduces the demands of the receiving range of the laser receiver, thus reduces the vacuum channel diameter, and reduces the system cost.

Description

technical field [0001] The invention belongs to the technical fields of optics, photoelectric detection and geometric position measurement, relates to a method for measuring tiny displacements by using a laser beam in a vacuum pipeline, and in particular to a method for measuring the diameter of a vacuum pipeline that can reduce the vacuum laser dam deformation measurement system. Background technique [0002] Since the laser propagates in a vacuum, it can avoid the influence of atmospheric turbulence, air temperature gradient and pressure gradient, and is an ideal straight line, so it is used in engineering to achieve high-precision deformation measurement. The vacuum laser dam deformation measurement system is a typical application, which is used for high-precision monitoring of the horizontal slippage and vertical settlement of the dam body. Compared with other types of monitoring devices, it has high measurement accuracy, long-term reliability and stability good points. ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an improved vacuum laser dam deformation measurement method, which can use a vacuum pipe with a smaller diameter to solve the problem of large diameter and high cost of the vacuum pipe

[0009] The technical solution of the present invention is to set a two-dimensional position adjustment mechanism between the zone plate and the measuring point base by improving the existing vacuum laser dam deformation measurement device and method, and change the original deviation measurement method to differential measurement method, which can solve the problems of large diameter and high cost of vacuum pipes in existing measurement methods

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