Optical detection system for carbon monoxide concentration

A carbon monoxide and optical detection technology, applied in the field of photoelectric information, can solve problems such as difficult gas concentration, and achieve the effect of improving test accuracy and wide detection limit

Inactive Publication Date: 2016-03-09
U COM TELECOM EQUIP CO LTD
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the line width of the molecular spectrum of gas is very narrow, the spectral width is generally on the order of nanometers, and the absorbed powe

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 detection system for carbon monoxide concentration

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] The present invention will be further explained below in conjunction with the drawings.

[0014] Such as figure 1 As shown, the optical detection system for carbon monoxide concentration includes: tunable DFBLD (distributed feedback laser diode), coupler, reference gas chamber, detection gas chamber, photodetector, preamplifier, differential signal device, lock-in amplifier, signal Processor; the tunable DFBLD is connected to the coupler, and the coupler is connected to the reference gas chamber and the detection gas chamber respectively. The reference gas chamber and the detection gas chamber are each connected to a photodetector, and each photodetector is connected to a preamplifier. Connect to the same differential annunciator, and then enter the signal processor after being amplified by the lock-in amplifier.

[0015] The optical detection system for carbon monoxide concentration is characterized in that: the signal processor includes a photoelectric conversion circuit ...

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 an optical detection system for the carbon monoxide concentration. The optical detection system comprises a tunable DFBLD, a coupler, a reference air chamber, a detection air chamber, photoelectric detectors, pre-amplifiers, a differential signal device, a lock-phase amplifier and a signal processor; the tunable DFBLD is connected with the coupler, the coupler is connected with the reference air chamber and the detection air chamber, the reference air chamber and the detection air chamber are each connected with one photoelectric detector, and each photoelectric detector is connected with one pre-amplifier and then connected into the same differential signal device and enters the signal processor after being amplified by the lock-phase amplifier. According to the optical detection system for the carbon monoxide concentration, errors are small, the test precision of the system is improved, and the wider detection limit is achieved.

Description

technical field [0001] The invention relates to an optical detection system for carbon monoxide concentration, which belongs to the technical field of photoelectric information. Background technique [0002] Most of the currently commonly used optical detection technologies for carbon monoxide concentration are based on the absorption spectrum theory of gas analysis, that is, to detect the concentration of gas by using the principle of absorption of light-space gas molecules at specific wavelengths. Due to the narrow line width of the gas molecular spectrum, the spectral width is generally on the order of nanometers, and the absorbed power is small compared with the external noise, it is very difficult to measure the gas concentration directly by detecting the weakening of the light intensity. [0003] Tunable Semiconductor Laser Absorption Spectroscopy (TDLAS) uses the wavelength tuning and scanning characteristics of the laser to obtain the absorption spectrum within the c...

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
CPCG01N21/39G01N2021/399
Inventor 周国锋
Owner U COM TELECOM EQUIP CO LTD
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