Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optical fiber transceiver integrated air differential optical absorption spectroscopy (DOAS) measuring system

A technology of differential absorption spectroscopy and measurement system, which is applied in the field of monitoring systems for measuring trace gases in the air. It can solve the problems of instrument adjustment and optical path alignment difficulties, and low spectral utilization efficiency of DOAS systems, so as to simplify instrument adjustment and alignment. process, improving spectral utilization efficiency, and avoiding occlusion effects

Inactive Publication Date: 2011-01-05
TIANJIN TONGYANG TECH DEV +2
View PDF2 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low spectrum utilization efficiency and difficulty in instrument adjustment and optical path alignment in the existing DOAS system, and to provide an optical fiber transceiver integrated air differential absorption spectrum measurement system

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 transceiver integrated air differential optical absorption spectroscopy (DOAS) measuring system
  • Optical fiber transceiver integrated air differential optical absorption spectroscopy (DOAS) measuring system
  • Optical fiber transceiver integrated air differential optical absorption spectroscopy (DOAS) measuring system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] figure 2 Shown is the optical fiber transceiver integrated air differential absorption spectroscopy measurement system provided by the present invention, which includes a point light source (xenon lamp) 6 capable of emitting a wide spectrum structure, a telescope and a spectrometer (not shown in the figure). Wherein the telescope includes: a spherical reflector 9, and a corner cube prism 10 at the other end of the optical path of the telescope. In addition, the system also includes a transceiver integrated optical fiber bundle structure (such as image 3 As shown), the fiber bundle structure is composed of a transmitting optical fiber 12 and a receiving optical fiber 13, one end of which is fixed together to become the common end 8 of the transmitting and receiving optical fiber, the common end is located on the optical axis of the telescope, assuming that the radius of the spherical mirror 9 is R, then The distance between the common end of the transmitting and recei...

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 transceiver integrated air differential optical absorption spectroscopy (DOAS) measuring system, which solves the problems of low spectrum utilization ratio and difficulty in instrument adjustment and optical path centering of the existing typical DOAS system. The measuring system comprises a point light source, a telescope, a spectrograph and an optical fiber bundle with a transceiver integrated structure, wherein, the optical fiber bundle with the transceiver integrated structure is composed of transmitting optical fiber and receiving optical fiber and provided with an optical fiber transceiver common port. The spectrum sent by the point light source is transmitted through the optical fiber transceiver common port from one end of the transmitting optical fiber, aligned through a spherical reflector in the telescope, reflected along the original direction after reaching a pyramid prism, focused through the spherical reflector and then enters the optical fiber transceiver common port, and finally transmitted through the other end of the receiving optical fiber and then led into the spectrograph for spectrum detection. Compared with the typical DOAS system, the measuring system reduces two plane reflectors, avoids a light beam being sheltered by the plane reflector during the transmission process, improves the spectrum utilization ratio and simplifies the instrument adjusting and centering process.

Description

【Technical field】: [0001] The invention relates to a differential absorption spectrum air quality monitoring system, in particular to a monitoring system for measuring trace gas in the air. 【Background technique】: [0002] Air pollution destroys the ecosystem and causes great harm to human health. Therefore, it is necessary to monitor various air pollutants first. The monitoring instruments in many cities in my country adopt point sampling, which can only understand the air pollution situation in the sampling space of the monitoring point and the average condition during the sampling period, and the temporal and spatial representation is poor. The telemetry technology using differential absorption spectroscopy (DOAS) is becoming an ideal tool for environmental pollution monitoring due to its large-scale, multi-component detection, and continuous real-time online measurement methods. Using DOAS technology can simultaneously monitor several pollutants in the same spectral abs...

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): G01N21/31
Inventor 魏永杰陈文亮徐可欣
Owner TIANJIN TONGYANG TECH DEV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products