Method and device for detecting surface precision of dish parabolic reflecting mirror

Abstract

The invention discloses a device for detecting the surface precision of a dish parabolic reflecting mirror. The device mainly comprises photoelectric position sensors, a mounting support, a double helix elevating mechanism, a 360-degree plane rotary mechanism, a telescoping mechanism, an extension rod, a photoelectric digital-to-analog conversion device and an upper computer. By adjusting and controlling the arranged double helix elevating mechanism, 360-degree plane rotary mechanism, telescoping mechanism and extension rod and adopting the high-precision photoelectric position sensors and the metered extension rod, precise X and Y axis position coordinate values can be obtained, and the coordinate values for determining the spatial positions of the detection points are obtained accordingto the position coordinate values; and finally, fitting is carried out according to the sampling values of the coordinate values of spatial positions in different positions to obtain the surface precision of the detected dish parabolic reflecting mirror, thus realizing the surface precision measurement of the dish parabolic reflecting mirror.

Description

technical field [0001] The invention relates to the technical field of optical instruments and optical testing, and more specifically relates to a method and a device for detecting the surface accuracy of a dish-type parabolic reflective mirror. Background technique [0002] The dish parabolic reflector is one of the core components in the trough system for high temperature heat collection, and is generally used in solar heat collection systems or heat collectors. The surface shape of the reflector is specifically dish-parabolic, and its opening can be designed according to different heat requirements. There are two types of small-diameter dish-parabolic reflectors and large-diameter dish-parabolic reflectors. [0003] Since the surface accuracy of the dish-type parabolic mirror directly affects the optical energy gathering efficiency in the high-temperature heat collection process, it is necessary to detect the error of the surface accuracy of the parabolic mirror in the pr...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a method and device for detecting the surface accuracy of a dish-type parabolic reflector, so as to overcome the problem that the equipment in the prior art is not targeted and cannot achieve high-precision and accurate measurement of the surface accuracy of a dish-type parabolic reflector. question

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