Multi- light path optical absorption aerometric measurement instrument

A technology of optical absorption and atmospheric measurement, applied in the field of optical measurement, can solve the problems of heavy instrument maintenance workload and achieve the effect of improving measurement efficiency and coverage area

Inactive Publication Date: 2008-08-13
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this type of instrument is that each instrument can only measure one pollutant, and the maintenance workload of the instrument is large.

Method used

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  • Multi- light path optical absorption aerometric measurement instrument
  • Multi- light path optical absorption aerometric measurement instrument

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Embodiment Construction

[0017] The preferred modes of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] see figure 1 The light source 2 adopts a high-pressure xenon lamp, which is located in the 4-light-path optical transmitting and receiving device 1, and can be collimated and emitted in 4 directions by the 4-light-path optical transmitting and receiving device; in the transmitting and receiving device 1, the first optical route is set in the The first spherical reflector 15 at the entrance end of the optical path, the first plane reflector 11 arranged at the rear of the optical path and at an angle of 45° with the first spherical reflector 15, and the first flat reflector 11 arranged in the middle of the optical path and perpendicular to the first spherical reflector 15 The 5th planar reflector 13 is composed of; the 2nd optical route is arranged on the 2nd spherical reflector 21 of this optical path entrance end, is arranged on this optic...

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Abstract

The invention belongs to the optical measuring technology field, specially to an optical air absorbing admeasuring apparatus of multi-light path, comprising four light path optical emitting and receiving device, a silica fibre, an array detector, a spectrophotometer and so on. Light source is in the emitting and receiving device. Four incident ends of the silica fibre are respectively on four assembling focuses of the emitting and receiving device. The emitting end is in incident window of the spectrograph; the spectrograph is composed of a collimation system and a grating; the array detector is connected at emitting window of the spectrograph, receiving spectral signature on four measuring light paths, connecting simultaneously to the computer by the cable conductor; the computer stores and analyzes the spectral signature, processing refutation concentration of the pollutant and displays pollutant concentration plane distribution above measuring area. The device has compact structure, high integration, measuring simultaneously air pollutant concentration on measuring light path in four directions, which is applied to continuous and online measurement of various pollutants in gas environment of large scale area.

Description

technical field [0001] The invention belongs to the technical field of optical measurement, and in particular relates to an optical absorption atmospheric measuring instrument, which is used for real-time monitoring of large-scale planar concentration distribution of atmospheric pollutants. Background technique [0002] At present, the measurement of air pollution gases such as nitrogen dioxide, sulfur dioxide, and ozone mainly includes air nitrogen dioxide, sulfur dioxide, and ozone automatic monitors, and long-range differential absorption spectroscopy gas pollution monitoring devices. When the automatic monitoring instrument is monitoring, the gas to be tested is first pumped into the instrument through the sampling tube to make it chemically react with certain substances, or to measure with ultraviolet light or the principle of ultraviolet absorption, such as nitrogen dioxide analyzer When working, first convert nitrogen dioxide into nitrogen monoxide, and then let nitro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/00G01N21/01
Inventor 周斌
Owner FUDAN UNIV
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