Image collecting circuit of high-speed absolute grating ruler

An absolute grating ruler and image acquisition technology, which is applied in the direction of using optical devices, converting sensor output, and measuring devices, to achieve the effects of increasing the average measurement speed, improving the bottleneck of process difficulty, and improving the measurement resolution

Active Publication Date: 2014-01-15
GUANGDONG UNIV OF TECH
View PDF8 Cites 37 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This measurement method is simple and easy, but in the use of CNC machine tools, it is necessary to return to the absolute zero point and reposition each time, so it is difficult to greatly improve the working efficiency of the machine tool

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Image collecting circuit of high-speed absolute grating ruler
  • Image collecting circuit of high-speed absolute grating ruler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The image acquisition circuit of the high-speed absolute grating ruler of the present invention, such as figure 1 As shown, the grating ruler bar 1 of the present invention is engraved with equidistant incremental code channels 6 and equidistant absolute code channels, the incremental code channel is a rough measurement code channel, and the absolute code channel 7 has a very dense fine line. Code track. The grating ruler 1 is also equipped with a photoelectric converter 5 for reading images and two LED light sources 4, wherein a number of reading data windows 2 and 3 are opened on the photoelectric converter 5, and the image acquisition circuit includes a circuit switcher 8. First A\D converter 9, second A\D converter 10, phase detector 11, first position detector 12, counter 13, second position detector 14, speed detector 15, correction processor 16. Phase correction processor 17, absolute position detector 18, speed discriminator 20, codec 21, storage 22, circuit s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to an image collecting circuit of a high-speed absolute grating ruler. Coarse code channels and high-precision absolute code channels are engraved in the grating ruler. A photoelectricity converter for reading images and two LED light sources are further installed on the grating ruler. Multiple data reading windows are arranged in the photoelectricity converter. The image collecting circuit comprises a circuit switching device, a first A / D converter, a second A / D converter, a phase detector, a first position detector, a counting device, a second position detector, a speed detector, a correcting processor, a phase correcting processor, an absolute position detector, a speed judging device, a coding and decoding device and a storage device. Phases output by the photoelectricity converter are used for finely dividing adjacent absolute coding engraving line intervals to improve measuring precision of the grating ruler, macro-micro composite reading on low-precision incremental code channels and high-precision absolute code channels is achieved with a reading head. In a low-precision measuring stage, high measuring speed is achieved and low-speed high-precision measuring is carried out by switching when an endpoint is close.

Description

technical field [0001] The invention is an image acquisition circuit of a high-speed absolute grating ruler, which belongs to the innovative technology of the image acquisition circuit of a high-speed absolute grating ruler. Background technique [0002] In 1874, Rayleigh (L. Rayleigh) used Moiré fringes for measurement for the first time, and since then there has been Moiré metrology. In 1953, the British Ferranti company invented the multiple reversible counting system, which made a breakthrough in the electronic system corresponding to the metering grating. The company's Edinburgh laboratory designed and built the first prototype to measure displacement using a Moiré fringe system. In the 1960s, NPL in the UK successively developed photoreticle reticle devices for circular gratings and long gratings, which broke through the manufacturing problem of grating masters. GuilD and Buech J.M conducted research on a series of theories of Moiré fringes. At the same time, Buss...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02G01D5/347
Inventor 陈新范朝龙王晗陈新度刘强
Owner GUANGDONG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap