Optical fiber sensing-based laser excitation heat wave signal detection device

A signal detection and optical fiber sensing technology, which is applied in measuring devices, material analysis through optical means, instruments, etc., can solve the problems of unfavorable carrying and handling, bulky, expensive, etc. The effect of simplifying and saving instrument cost

Inactive Publication Date: 2016-04-20
HEFEI ZHICHANG PHOTOELECTRIC TECH
View PDF12 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a laser-excited thermal wave signal detection device based on optical fiber sensing, which uses the characteristics of the optical fiber itself to have a small core diameter and spatial filtering capability, and at the same time combines the chromatic aberration characteristi

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
  • Optical fiber sensing-based laser excitation heat wave signal detection device
  • Optical fiber sensing-based laser excitation heat wave signal detection device
  • Optical fiber sensing-based laser excitation heat wave signal detection device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] The present invention will be further described below with reference to the drawings and specific embodiments.

[0016] Such as figure 1 As shown, a reflection mode laser excited heat wave signal detection device based on fiber sensing includes a pump laser light source 1, a detection laser light source 2 and a first focusing lens 41. The pump laser beam output by the pump laser light source 1 is modulated and enters the center of the first focusing lens 41 through the first optical fiber 31; the detection laser beam output by the detection laser light source 2 enters the first focusing lens through the second optical fiber 32 The edge position of 41; the first focusing lens 41 will converge the pump laser beam and the probe laser beam incident at different incident points to the same area on the sample 5, and the sample 5 is placed at the focal plane of the first focusing lens 41; The focusing lens 41 also collects the detection laser beam reflected from the sample 5. The...

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 provides an optical fiber sensing-based laser excitation heat wave signal detection device, comprising a pumping laser light source, a detection laser light source, a focusing lens and optical fiber. The optical fiber is used to transmit a pumping laser beam and a detection laser light beam, the same focusing lens is used to converge the two beams, and the detection laser light beam reflected or transmitted by a sample is received by also using the optical fiber at a detection end, so that the structure of a whole light path system is greatly simplified, instrument microminiaturization and portability can be realized, instrument cost is greatly reduced, and the popularization and application of a laser excitation heat wave signal detection technology are facilitated.

Description

Technical field [0001] The invention relates to the technical field of laser-excited heat wave detection, in particular to a laser-excited heat wave signal detection device based on optical fiber sensing. Background technique [0002] Laser-induced thermal wave technology is an effective detection method with high sensitivity, non-contact, and diverse measurement methods. It can be used for detection and analysis of different material properties (including material absorption characteristics, thermophysical characteristics, defects, etc.). A common detection method for detecting the laser-excited heat wave signal is: when the pump laser interacts with the material and is excited to generate the heat wave signal, a weaker detection laser is also used to pass the heat wave signal in the material. Area, the detection laser beam can have a certain angle with the pump laser beam, or it can be coaxial. [0003] When the detection laser is excited by the pump laser to generate the therm...

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): G01N21/17
CPCG01N21/17
Inventor 李冰冰陈坚董敬涛吴周令
Owner HEFEI ZHICHANG PHOTOELECTRIC 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