Laser measurement method and device for light obscuration of inorganization-emission particulate smoke plume

A fugitive emission and laser measurement technology, applied in the direction of transmittance measurement, etc., can solve the problems of insufficient reliability, poor measurement objectivity, and low precision, and achieve simplified operation and debugging, compact device structure, small volume and energy consumption Effect

Inactive Publication Date: 2013-07-03
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of poor measurement objectivity, insufficient reliability and low precision of existing methods, and provide an atmospheric laser transmission based on open-path laser with strong reliability, simple operation, compact structure, high efficiency and strong adaptability Method and device for observing the opacity of fugitive emission particles

Method used

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  • Laser measurement method and device for light obscuration of inorganization-emission particulate smoke plume

Examples

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Effect test

Embodiment 1

[0036] Embodiment 1: Measurement of opacity of dust in construction site, and comparison with digital video camera photographing method

[0037] The measurement location is selected in a construction site under construction in Xiamen. As shown in accompanying drawing 1, the specific implementation process of this measuring method and device is as follows:

[0038](1) Place the transmitting and receiving end A of the shell equipped with light source and other components and the reflecting end B equipped with the reflector respectively on a certain transportation road in the construction site, and the distance can be between 3m and 100m. Sight, adjust the light exit port of housing A to align with reflective end B.

[0039] (2) The light source is selected as a semiconductor laser with an output wavelength of 532nm and a maximum output power of 5 milliwatts. First turn off the laser light source to obtain the respective background and noise of the two detectors: I Na , I Nb...

Embodiment 2

[0045] Embodiment 2: Measurement of opacity of military smoke screen

[0046] Smoke screens play an important role in military self-defense and in interfering with the work of enemy reconnaissance instruments. The opacity of the smoke screen in the infrared band is the main index to measure the shielding performance of the smoke screen. In this example, the laser is selected as an infrared laser with an output wavelength of 808nm. The transceiver end A and the reflection end B are placed on both sides of the smoke curtain wall. The other implementation processes are the same as in Example 1.

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Abstract

The invention relates to a laser measurement method and a device for the light obscuration of inorganization-emission particulate smoke plume. The device disclosed by the invention is used for measuring the light intensity of a light source and the light intensity of a signal after passing through the smoke plume simultaneously, with less interference of environment and background light; and the light-emitting end and the light-receiving end of the device are integrated; the laser emitted by a laser device in the device disclosed by the invention is reflected via a reflector at first, and then divided into a transmitting light and a reflected light by a beam splitter; the transmitting light is detected by a light source signal detector, the reflected light is beam-expanded via an off-axis parabolic mirror and then penetrates through the to-be-measured particulate smoke plume, and then reflected back to the off-axis parabolic mirror via a corner reflector at the other side of the smoke plume; the reflected light is collected by the off-axis parabolic mirror and then received by another detector; and the signals received by the two detectors are converted by an analogue / digital converter and then output to a computer. The invention aims at providing an open-circuit type measurement device for light obscuration, which is compact in structure and strong in portability; and the device is suitable for rapid and continuous detection for the light obscuration of outdoor inorganization-emission particulate smoke plume.

Description

Technical field [0001] The present invention involves the field of atmospheric environment monitoring, especially a laser measurement method and device with non -organized granules with no tissue emissions. Background technique [0002] Urban non -tissue -emile particle smoke mainly includes building dust and motor vehicle dust. Oppositioning is an important parameter for measuring the intensity of non -tissue smoke emissions. [0003] For the observations of non -tissue -emitted granular smoke, the current main method is two types: human eye observation and digital camera technology.(1) Human Eye Observation: Settlers who have received simple training are standing in a specific location and observed the granular smoke or dust with the naked eye.It has been used many times and is listed as a standard method by the U.S. Environmental Protection Agency 1,2 However, no tissue emissions are complicated because of the complicated pollution process and high randomness. This method disa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/59
Inventor 石鹏杜可
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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