Optical grating ruler with double light sources

A grating ruler and dual light source technology, applied in the direction of using optical devices, using optical devices to transmit sensing components, measuring devices, etc., can solve the problems of complex processes, affecting the output signal of the grating ruler, etc., so as to reduce the difficulty of the process and improve the production efficiency. , cost saving effect

Inactive Publication Date: 2012-01-11
GUANGZHOU LOKSHUN CNC EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of multiple light sources is that when the luminous intensity of one of the light sources changes, it will affect the output signal of the entire grating scale
The disadvantage of single light source is: more complicated process, or use of special light source

Method used

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  • Optical grating ruler with double light sources
  • Optical grating ruler with double light sources
  • Optical grating ruler with double light sources

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Experimental program
Comparison scheme
Effect test

Embodiment

[0016] The solution of the present invention adopts two receiving devices (i.e., receiving tubes) for receiving anti-phase signals to correspond to the same light source, and two light sources are required for four phases, so it is called a dual light source, and a corresponding dual light source indicating grating is designed such as Figure 4 As shown, the details are as follows:

[0017] exist Figure 4 In the dual light source indicator grating diagram, the two large circles are 0, 180 and 90, 270 line areas respectively, which correspond to a light source 1 when used. In the dual light source design scheme, 0, 180 and 90, 270 respectively share a luminous tube, when one of the luminous tubes weakens, the amplitude of the S (or C) signal changes, but the average value does not change, so the output square wave A and B will not change and will not affect the counting of the grating scale.

[0018] Embodiments of the present invention, such as Figure 5 , there are two li...

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PUM

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Abstract

The invention discloses an optical grating ruler with double light sources, which comprises light sources, a main optical grating, an indicating optical grating and receiving pipes. The indicating optical grating is parallel to the main optical grating; two light resources are arranged; each light source corresponds to two phases of the indicating optical grating and two receiving pipes; the two light sources and four receiving pipes are respectively arranged on two sides of the main optical grating; and in four phases of the indicating optical grating, a distance between the two phases sharing the same light source is less than that between the two phases which do not share the same light source. The optical grating ruler with the double light sources uses common light resources without a lens; the lens is not necessary to be added additionally; the integral mechanical structure is simple; and the quality problem of the optical grating ruler caused as the light sources are aged is solved.

Description

technical field [0001] The invention relates to a double light source grating ruler. Background technique [0002] There are two types of photoelectric receiving methods for the current grating ruler: the first one, such as figure 1 As shown, each receiving device (ie, receiving tube) corresponds to a light source, so multiple receiving devices correspond to multiple light sources (hereinafter referred to as multiple light sources). Signal waveforms of multiple light sources such as figure 2 As shown, the 0, 90, 180, and 270 four-way signals are the original signals received by the receiving device, and the S and C signals are synthesized by the 0 and 180, 90 and 270 signals respectively. In the existing four-light source design scheme, four-way When one of the original signals is weakened, the middle level of the S (or C) signal will change, so that the duty cycle of the output square wave A (or B) will change, affecting the counting of the grating ruler. The distance b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00
CPCG01D1/00G01D5/38
Inventor 潘伟华梁乘峰詹亮解娜陈南生陈础娟
Owner GUANGZHOU LOKSHUN CNC EQUIP
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