Differential type laser-measuring-impact method and device based on partial period demodulation

A technology of impact device and residual period, applied in the field of photoelectric measurement, can solve the problem of poor quality of laser Doppler signal waveform, and achieve the effects of good adaptability, high demodulation efficiency, strong adaptability and robustness

Inactive Publication Date: 2015-05-13
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of poor quality of the laser Doppler signal waveform obtained during ultra-high shock measurement calibration and testing, and propose a differential laser shock measurement method and device based on residual period

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
  • Differential type laser-measuring-impact method and device based on partial period demodulation
  • Differential type laser-measuring-impact method and device based on partial period demodulation
  • Differential type laser-measuring-impact method and device based on partial period demodulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] Such as figure 1As shown, a kind of differential laser shock measuring device based on residual period demodulation of the present invention consists of a laser 1, a beam splitting prism 2, a focusing lens 3, a grating measurement surface 4, a shock table 5, a mirror 6, a mirror 7, The focusing lens 8, the photoelectric converter 9 and the data acquisition system 10 are composed; the laser light emitted by the laser 1 is divided into two by the beam splitting prism 2, and then reaches the diffraction grating of the grating measurement surface 4 respectively through the focusing lens 3, and passes through the grating measurement surface. The beams are combined into one beam after being reflected by the diffraction grating of 4, reflected by the mirror 6 and the mirror 7, and then reach the focusing lens 8 to generate interference, and finally the interference signal is received by the photoelectric converter 9 and converted into an electrical signal, and the electrical si...

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 a differential type laser-measuring-impact method and device based on partial period demodulation, and belongs to the technical field of photoelectric measurement. The method is characterized by comprising the following steps: performing optimal estimation of sine parameters by using a model section smaller than one carrier period; applying an estimation result to differential type laser-measuring-impact data processing, so as to complete instantaneous frequency demodulation of a laser Doppler signal and further acquire impact speed waveforms and impact acceleration waveforms. The device provided by the invention consists of a laser 1, a beam splitter prism 2, a focusing lens 3, a measuring surface (a grating) 4, an impact table 5, a reflecting mirror 6, a reflecting mirror 7, a focusing lens 8, a photoelectric converter 9 and a data acquisition system 10. The impact measurement carried out by utilizing the method and the device provided by the invention has the advantages that the temporal resolution is high, the algorithm is absolutely convergent, the high adaptation and robustness for non-stable laser Doppler time-domain signals are achieved, and traceable calibration can be conveniently carried out.

Description

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

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
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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