Optical detection system for measuring concentrations of different gases

A technology for optical detection and gas concentration, which is applied in measuring devices, color/spectral characteristic measurement, material analysis through optical means, etc., to achieve the effect of broad application background, high measurement accuracy and strong anti-electromagnetic interference ability

Inactive Publication Date: 2013-05-22
BEIJING RES INST OF TELEMETRY +1
View PDF7 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with previous gas detection methods, there has not yet been a gas detection method for multiple g

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 measuring concentrations of different gases
  • Optical detection system for measuring concentrations of different gases

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings.

[0013] like figure 1 As shown, the measurement of the concentration of various gases is realized through the control of the microprocessor. Since the broadband light source covers the absorption lines of various gases, the broadband light source in the C+L band is very mature at present, and the types of gases that can be measured in this band Including: acetylene (1525nm), ammonia (1544nm), carbon dioxide (1573nm), carbon monoxide (1567nm), etc. Therefore, when measuring the concentration of a certain gas, first select the type of gas to be measured on the display control terminal, and the microprocessor controls the The sawtooth wave amplitude of the signal source drives the adjustable optical filter to scan the gas absorption line, and the concentration of the gas to be measured can be measured through the demodulation circuit behind.

[0014] The realization princ...

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 measuring concentrations of different gases. A microprocessor controls a signal source to generate a voltage drive signal and controls the signal source to output a low-frequency sinusoidal modulating signal and a frequency-doubling square wave reference signal, the low-frequency sinusoidal modulating signal is used for carrying out wavelength regulation on output light of an adjustable optical filter, the frequency-doubling square wave reference signal is used for locking the reference input of an amplifier so as to control the output wavelength of the adjustable optical filter for completing the selection of a measuring gas, and a low-frequency modulation and locking amplification technology is selected according to the characteristic of a device for achieving the demodulation of the concentrations of the gases. Compared with a traditional method for measuring the concentrations of different gases, the optical detection system is capable of selectively measuring different gases, achieves concentration modulation by adopting a hardware circuit, and particularly relates to the absorption characteristic of the gas in a near-infrared band and a wavelength-modulation-based locking and amplifying technology. The optical detection system for measuring the concentrations of different gases has the advantages of high integration degree, strong anti-electromagnetic interference capacity, high measuring degree, stable and reliable performance and long service life and the like.

Description

technical field [0001] The present invention relates to an optical detection system for measuring gas concentration, in particular to an optical detection system which can be used for the measurement of various gas concentrations. places of concentration. Background technique [0002] With the continuous development of science and technology, more and more gas concentration detection is involved in industries, mines, environment, transportation, aerospace and other fields. In our country, the rapid development of industrialization has made environmental pollution more and more serious, among which large factories and mining departments discharge a large amount of toxic, harmful, flammable and explosive gases in the production process, which is one of the main sources of environmental pollution. These harmful gases not only have an impact on human health, but also cause serious pollution to the atmosphere, water, etc., destroying the ecological balance. Real-time and accura...

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): G01N21/31G01N21/01
Inventor 郑林史青孙舟璐王鲜然陈青松
Owner BEIJING RES INST OF TELEMETRY
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