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Metal reflection type absolute grating ruler based on image detector

A technology of absolute grating ruler and image detector, which is applied in the field of image detection, can solve the problems of complex installation and adjustment of absolute grating ruler, poor stability, etc., and achieve the effects of enhancing seismic performance and environmental adaptability, reducing volume, and simple manufacturing process

Inactive Publication Date: 2020-06-26
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention aims to solve the technical problems of complex installation and poor stability of the absolute grating ruler in the prior art, and provides a metal reflective absolute grating ruler based on an image detector

Method used

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  • Metal reflection type absolute grating ruler based on image detector
  • Metal reflection type absolute grating ruler based on image detector
  • Metal reflection type absolute grating ruler based on image detector

Examples

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, a metal reflective absolute grating ruler based on an image detector includes: a metal reflective code ruler and a measuring probe; the metal reflective code ruler and the measuring probe can respectively occur along the metal reflective The longitudinal relative movement of the yardstick; the metal reflective yardstick is provided with a plurality of light and dark stripes; the measuring probe includes: a processing control circuit, a CCD, and a light source system; the CCD and the light source system are respectively connected to the The processing control circuit is connected; the processing control circuit can control the operation of the CCD and the light source system; the light source system can generate parallel light and make it incident on the metal reflective yardstick at a certain angle; the The metal reflective yardstic...

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Abstract

The invention relates to a metal reflection type absolute grating ruler based on an image detector, and solves the technical problems that an existing absolute grating ruler is complex in installationand adjustment and poor in stability. The absolute grating ruler comprises a metal reflection type coded ruler and a measuring probe; the metal reflection type code ruler and the measuring probe canmove relatively in the longitudinal direction of the metal reflection type code ruler. A plurality of bright and dark stripes are arranged on the metal reflection type coded ruler; the measuring probecomprises a processing control circuit, a CCD and a light source system. The traditional Moire fringe technology is replaced by the image processing technology, the line of the code ruler is thick, and the manufacturing process is simple. Moire fringes do not need to be modulated in the working process, only images of the code ruler need to be collected and processed, the time for manufacturing the code ruler and adjusting the grating ruler can be greatly shortened through the design, and the working efficiency is improved. The manufacturing substrate of the coded scale is made of metal, so the anti-seismic property and the environmental adaptability of the absolute grating scale are enhanced; meanwhile, the reflection type measuring probe is designed, the size is reduced, and installation is convenient.

Description

technical field [0001] The invention relates to the technical field of image detection, in particular to a metal reflective absolute grating ruler based on an image detector. Background technique [0002] The grating ruler is a linear displacement sensor, among which the absolute grating ruler is widely used to provide absolute linear displacement for CNC machine tools and other equipment. At present, the main absolute grating rulers are all realized by using the moiré fringes produced by light interference or diffraction, and then using single-track absolute position encoding technology. Due to the complex modulation of light interference or diffraction, and the requirement for the scale density of the yardstick, complex assembly and yardstick manufacturing processes are often required. Usually, the yardstick is made of optical glass with excellent optical performance, but its shock resistance is poor, and its working performance is unstable in harsh environments. Conten...

Claims

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Application Information

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IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 韩庆阳陈赟张晰高胜英
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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