Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Laser phase generated carrier doppler vibration signal detection system and demodulation method

A vibration signal and phase carrier technology, which is applied in measuring devices, using wave/particle radiation, measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problems of large bandwidth B value and low vibration detection sensitivity, and achieve high precision and good environment Adaptability, the effect of improving sensitivity

Active Publication Date: 2015-10-07
江苏安智光电科技有限公司 +1
View PDF4 Cites 19 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 technical problem that the bandwidth B value is too large when the acousto-optic shift method is used as the heterodyne frequency shift at present, resulting in low vibration detection sensitivity

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
  • Laser phase generated carrier doppler vibration signal detection system and demodulation method
  • Laser phase generated carrier doppler vibration signal detection system and demodulation method
  • Laser phase generated carrier doppler vibration signal detection system and demodulation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Now, the present invention will be described in further detail in conjunction with the accompanying drawings and embodiments. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention, and should not be construed as limiting the present invention.

[0033] Such as Figure 1-3 Shown, the detection system of a kind of laser phase carrier Doppler vibration signal of the present invention comprises figure 1 The signal generation unit shown, figure 2 The optical path unit shown and image 3 The demodulation unit shown;

[0034] The signal generating unit includes a signal generator 9, the output signal of the signal generator 9 is divided into two paths, the first path outputs two paths of orthogonal signals sin(Csin(ωt)) and cos(Csin(ωt) ), the second channel outputs the phase shift drive signal sin(ωt) after passing thro...

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 discloses a laser phase generated carrier doppler vibration signal detection system including a signal generation unit, an optical path unit, and a demodulation unit, and the input end of the demodulation unit is connected two orthogonal signals sin (Csin (Omega t) and cos (Csin (Omega t) from the signal generation unit and an interference signal from the optical path unit, so that the demodulation unit can demodulate the vibration signal to be detected. The invention discloses a laser phase generated carrier doppler vibration signal demodulation method. Through the adoption of an orthogonal phase lock +DCM demodulation method, a vibration signal, after being subjected to electro-optical modulation, of a target to be detected is demodulated by multiplication, low-pass filtering, differentiation, subtraction, and integration calculation. According to the invention, the environmental disturbance resistance property of a conventional homodyne detection can be greatly improved at a low cost; and meanwhile, compared with a conventional laser doppler vibration detection method based on acousto-optic frequency shift, the method provided is high in precision, and the system is simple in optical structure and has good environment adaptability.

Description

technical field [0001] The present invention relates to a detection system of laser phase carrier Doppler vibration signal, and to a demodulation method of laser phase carrier Doppler vibration signal, in particular to a laser phase carrier Doppler vibration signal based on quadrature demodulation A detection system and a demodulation method for a Puller vibration signal. Background technique [0002] Vibration detection technology is currently more and more widely used, and the requirements are getting higher and higher. It is required to be able to detect the tiny vibration amplitude of the target to be measured, so as to obtain more information or discover hidden dangers in time, that is, for vibration listening technology , it is hoped that the smaller the vibration amplitude of the detected object, the better. According to the report in Random speckle Modulation Technique for Laser Interferometry published by Peter B et al.: the accuracy of heterodyne interference detec...

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
IPC IPC(8): G01H9/00
Inventor 曾华林李博皓陆小英李耀祖张心宇
Owner 江苏安智光电科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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