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Synchronous particle and gas concentration measurement device and method based on infrared light modulation technology

A technology of gas concentration and modulation technology, which is applied in the field of optical measurement, can solve the problems that the signal-to-noise ratio cannot meet the measurement, is easily affected by external light sources, and the scattered light intensity is small, so as to achieve lower detection limit, high sensitivity, and improved signal-to-noise than the effect

Active Publication Date: 2019-05-28
SOUTHEAST UNIV
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Problems solved by technology

[0006] When the particle concentration is extremely low, the scattered light intensity is extremely small, and it is easily affected by external light sources, and optical path jitter, mechanical vibration, and detector noise will all affect the detection signal, so that the signal-to-noise ratio cannot meet the measurement requirements

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  • Synchronous particle and gas concentration measurement device and method based on infrared light modulation technology
  • Synchronous particle and gas concentration measurement device and method based on infrared light modulation technology
  • Synchronous particle and gas concentration measurement device and method based on infrared light modulation technology

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Embodiment Construction

[0023] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings, but the scope of protection claimed by the present invention is not limited thereto.

[0024] Such as figure 1 As shown, the particle and gas concentration synchronous measurement device based on infrared light modulation technology of the present invention sequentially includes a signal sending module 1, a particle and gas measurement module 2, a signal receiving module 3 and a signal processing module 4; the signal generating module 1 includes a function generator 5, laser controller 6, distributed feedback laser (DFB) 7, optical fiber beam splitter 8 and optical power amplifier 9; particle and gas measurement module 2 includes optical etalon 10, heat tracing tube belt 13, measurement cell 11 and package The heating module 12 outside the measuring pool 11; the signal receiving module 3 is composed of three photodetectors 15; the particulate m...

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Abstract

The invention discloses a synchronous particle and gas concentration measurement device and method based on an infrared light modulation technology. According to the method, a light scattering measurement light path is coupled with a wavelength modulation measurement light path, so that synchronous concentration measurement of low-concentration particles and gas is realized. According to the method, there is no need to additionally consider low-frequency noise such as background dark current of a detector, so that the signal-to-noise ratio of the concentration measurement of the low-concentration particles and gas is effectively increased; the sensitivity is higher; the limit to existing concentration measurement of particles and gas is lowered. Therefore, the method has an important application value in realization of synchronous online monitoring of to-be-detected particles and gas in a coal-fired power plant with ultra-low emission demands.

Description

technical field [0001] The invention relates to a particle and gas concentration synchronous measurement device based on light scattering and spectroscopy technology, and also relates to a measurement method of the particle and gas concentration synchronous measurement device based on infrared light modulation technology, which belongs to the field of optical measurement technology. Background technique [0002] In recent years, with the country's increasing emphasis on environmental protection and the need to ensure safe and efficient industrial production, accurate monitoring of the concentration of particulate matter and pollutant gas components is of great significance for controlling air pollution emissions. In order to facilitate the supervision and management of the environmental protection department and minimize the discharge of pollutants, it is imminent to research and manufacture technologies and equipment that can accurately and quickly measure the concentration ...

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Application Information

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IPC IPC(8): G01N15/02G01N21/39
Inventor 周宾陈慈伟祝仰坤王一红梁伟灿
Owner SOUTHEAST UNIV
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