Laser-sensing-based multi-parameter detection method

Abstract

The invention relates to a laser-sensing-based multi-parameter detection method. With the method, a problem that simultaneous detection of concentration and vibration can not be realized in the prior art can be solved. According to the invention, on the basis of laser environment sensing, a spectrum detection principle and a laser speckle effect are combined; and a laser beam irradiates a detected area and a laser speckle passes through an optical imaging system and is detected by a two-dimensional photoelectric sensor. With the out-of-focus imaging technology, the speckle information detected by the two-dimensional imaging photoelectric sensor is processed, thereby realizing measurement of the mechanical vibration characteristic of the detected area. An intensity photoelectric sensor is used for detecting a scattered light signal; and a second-harmonic absorption spectrum analysis algorithm is used to obtain gas concentration information at a path where the light beam passes. The provided multi-parameter detection method has the following characteristics: non-destructive testing and telemetering are realized; detection of object concentration and vibration parameters is realized based on different physical detection principles; the sensitivity and signal to noise ratio are high; shapes and materials of detected objects are diversified; the information content is high; the system is easy to construct; the application range is wide; and the functions are easy to expand and the like.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to a multi-parameter detection method, in particular to a multi-parameter detection method based on laser perception, which is mainly used in material analysis, environmental monitoring, resource exploration, food safety, biological research, life science, medicine Multi-parameter detection methods in the fields of medical treatment, process control, national defense security, engineering testing, hazard assessment, environmental perception, Internet of Things, advanced manufacturing, etc. Background technique [0002] Multi-parameter detection widely exists in many fields such as material analysis, environmental monitoring, resource exploration, food safety, biological research, life science, medical treatment, process control, national defense security, engineering testing, risk assessment, environmental perception, Internet of Things, advanced manufacturing, etc. , Play an importa...

AI Technical Summary

Problems solved by technology

There is a multi-parameter detection method in the prior art, based on the same detection device to measure multiple parameters, there is a Raman spectroscopy detection technology in the prior art, a tip-enhanced Raman spectroscopy technology, (see US patent, patent name: High contrast tip- enhanced Raman spectroscopy, inventors: Alexei P. Sokolov, Alexander Kisliuk, Disha Mehtant, Ryan D. Hartschuh, Nam-Heui Lee, patent number: US7656524B2, patent authorization time: February 2, 2010), although there are certain characteristics , but there are still essential deficiencies. 1) Using the principle of needle-tip-enhanced Raman spectroscopy requires that the needle tip and the substance to be detected need to rent each other at a close distance. Therefore, it is easy to contaminate the substance to be detected and affect the correctness of the detection results; 2) Although To perform multi-parameter detection, but to detect similar physical parameters based on the same physical mechanism, the system construction flexibility is low, the amount of information is small, and the simultaneous detection of vibration characteristics and gas concentration cannot be realized; 3) This detection method is essentially sensitive to the There are essential requirements for the material properties of the detection object, which limits the scope of application

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