Device and method for detecting concentration of human respiration marking gas on line by laser absorption spectroscopy technology

A technology of laser absorption spectrum and detection of human body, which is applied in the direction of color/spectral characteristic measurement, etc., can solve the problems that it is difficult to carry the instrument into the community and family, cannot enter the clinical stage, and the instrument is bulky, etc., so as to make it easy to complete the analysis The effect of detection, simple structure and fast response

Inactive Publication Date: 2014-12-10
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
View PDF6 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional analysis method of gas chromatography-mass spectrometry for breath detection can make the measurement accuracy of breath gas markers reach ppb or even ppt level, but this method takes a long time, the instrument is b

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
  • Device and method for detecting concentration of human respiration marking gas on line by laser absorption spectroscopy technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Such as figure 1 As shown, the system components included in the present invention can be divided into the following three parts: one is the optical system, the other is the signal monitoring and collection and processing system, and the third is the gas circuit system. Among them, the optical system includes: laser temperature control board 1, laser current control board 2, DFB laser 3, signal generation board 4, FC / APC pigtail 5, fiber collimator 6, planar high reflection mirror 7, photoacoustic gas A pool 8, a quartz window 9, a laser beam 10 and two concave mirrors 11 with high reflectivity. The signal monitoring, collection and processing system includes: a miniature microphone 13, a preamplifier 14, a lock-in amplifier 15, a computer 16 and a data acquisition card 17. The gas circuit system includes: a breathing gas nozzle 18, a ...

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 device and a method for detecting the concentration of human respiration marking gas on line by a laser absorption spectroscopy technology. The device is characterized in that a laser temperature control plate and a laser current control plate are used for controlling a DFB (distributed feedback) laser device; a signal generator is used for generating sawtooth waves and sine waves; laser with the specific absorption wavelength is output by the laser device and collimated by an optical fiber collimator, enters a light-sound gas pool, and is reflected for multiple times by two high-reflectivity concave mirrors to interact with gas to be detected; a light-sound signal detected by a microphone is transmitted to a front amplifier, enters a phase-lock amplifier and is finally acquired and processed by a computer and a data acquisition card. The method is characterized in that a tester blows air into a vapor drying bottle through a respiration air nozzle to remove vapor and the air enters the light-sound gas pool, and an air pressure control pump, a temperature detection meter and a pressure detection meter are used for controlling the pressure in the pool and acquiring the temperature and the pressure for inverse concentration calibration. The device is unique in design and novel in structure; the in-situ online detection is performed, the complexity of other detection technologies is avoided, and the detection precision is improved.

Description

technical field [0001] The present invention relates to a device and method for on-line detecting the concentration of human respiration-marking gas by laser absorption spectroscopy, more specifically, a device and method for detecting the concentration of human respiration-marking gas based on photoacoustic spectroscopy and wavelength-modulated absorption spectroscopy. Device and method for online detection. Background technique [0002] With the development of modern medical technology and the integration of multiple disciplines, the early diagnosis technology of major diseases, which is the foreword of medical research, is constantly breaking through and innovating. In particular, respiratory biomarker technology for the diagnosis of major diseases has developed rapidly. Medical research has shown that nitrogen (N 2 ), oxygen (O 2 ), carbon dioxide (CO 2 ), water vapor (H 2 O) and inert gases also contain many ppm (parts-per-million, 10 -6 ) or even ppb (parts-per-b...

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): G01N21/39
Inventor 张志荣董凤忠夏滑韩荦孙鹏帅崔小娟吴边庞涛
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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