Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Grating speed measurement method and device

A speed measurement and grating technology, applied in the field of grating Moiré fringe subdivision technology, can solve problems such as the inability to realize speed measurement, and achieve good linearity, increase the number of subdivisions, and achieve good pixel uniformity.

Inactive Publication Date: 2016-07-06
SHENYANG POLYTECHNIC UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: The present invention provides a grating velocity measurement method and device, the purpose of which is to solve the problem that the previous devices cannot realize the velocity measurement

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
  • Grating speed measurement method and device
  • Grating speed measurement method and device
  • Grating speed measurement method and device

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0035] Specific embodiments: the patent of the present invention will be further described below in conjunction with the accompanying drawings:

[0036] A grating speed measurement method, using CMOS to collect the Moiré fringe light intensity signal of the grating sensor, and modulate it to the frequency of the wavelet base, and then perform wavelet transformation on the modulated signal to determine the frequency value corresponding to the largest ridge, according to the frequency value Then calculate the velocity value, the steps of this method are as follows:

[0037] ① Extract two grating signals with a difference of 90° in CMOS

[0038] A complex number is composed of two orthogonal grating signals: U(x)=U c (x)+jU s (x),

[0039] ②Wavelet FM signal:

[0040] The wavelet basis function can be optional. When the complex Shannon wavelet basis function is selected, the output signal of the grating sensor is modulated by the complex Shannon wavelet basis function is to m...

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

In the position control system, multiple feedbacks such as displacement and speed are used to improve control accuracy. The grating has the advantages of precision, large range, and low cost as displacement feedback. This paper proposes the use of wavelet transform to realize the dual-parameter simultaneous extraction of the displacement and velocity of grating Moiré fringes. The scale factor corresponds to the velocity, the translation factor corresponds to the displacement, and the modulation changes The traditional grating Moiré fringe only measures single parameter of displacement and multi-parameter sensor realizes multi-parameter feedback, which is of great significance for improving positioning accuracy and simplifying the structure of the positioning system.

Description

Technical field: [0001] The patent of the present invention mainly involves the measurement of multiple parameters such as grating displacement, velocity, and acceleration, and the subdivision technology of grating moiré fringes. Background technique: [0002] Metering grating is a sensor that uses grating Moiré fringe phenomenon to measure length and angle. Because of its high measurement resolution, reliable use, small size, and easy maintenance, it is widely used in industrial control detection systems. For example, the grating sensor is used in the position and speed measurement system of the robot, which converts physical quantities such as position and speed into corresponding digital quantities, and realizes the measurement and control of the position and speed of the robot. Therefore, the grating sensor is an important part of the robot system, and its measurement accuracy and resolution directly affect the accuracy and performance of the robot system. At present, t...

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 Patents(China)
IPC IPC(8): G01P3/36G01B11/02
Inventor 常丽
Owner SHENYANG POLYTECHNIC UNIV
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com