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Method and device for detecting diameter of atmospheric black carbon aerosol particle

A particle diameter and detection device technology, applied in measuring devices, optical devices, instruments, etc., can solve the problem of inability to accurately detect the diameter of black carbon aerosol particles

Inactive Publication Date: 2012-02-15
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The present invention overcomes the deficiency that the existing photoelectric detection method cannot accurately detect the diameter of black carbon aerosol particles, and provides an accurate and reliable detection method and detection device for the diameter of black carbon aerosol particles in the atmosphere

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  • Method and device for detecting diameter of atmospheric black carbon aerosol particle
  • Method and device for detecting diameter of atmospheric black carbon aerosol particle
  • Method and device for detecting diameter of atmospheric black carbon aerosol particle

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Embodiment Construction

[0030] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0031] For ease of description, the present invention figure 1 The existing single particle smoke photometer shown is improved to obtain an embodiment of the atmospheric black carbon aerosol particle diameter detection device of the present invention. Such as figure 1As shown, the device includes a laser generator, a gas injector and 4 photodetectors, where detector 1 detects incandescent light with a wavelength of 630-800nm, and detector 2 detects incandescent light with a wavelength of 350-800nm , detector 3 is a low-gain detector for scattered light, and detector 4 is a high-gain detector for scattered light. The gas injector ejects the gas sample at a constant speed, making it pass through the center of the laser beam vertically. The particles in the gas rapidly become incandescent under the laser irradiation and emit incandescent light. Detectors...

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Abstract

The invention discloses a method for detecting the diameter of an atmospheric black carbon aerosol particle and belongs to the technical field of photoelectric detection. With the improvement of the conventional photoelectric detection method, the method comprises the following steps of: forming a gap on a photoelectric sensor, and thus forming an obvious notch in scattered light intensity time series data which is obtained by detection; and selecting an appropriate time series data segment for fitting by using the notch as a reference point, and thus obtaining a complete Gaussian function curve, so that the diameter of the atmospheric black carbon aerosol particle can be accurately detected. The invention also discloses a device for detecting the diameter of the atmospheric black carbon aerosol particle.

Description

technical field [0001] The invention relates to a particle detection method, in particular to a method and a detection device for detecting the diameter of atmospheric black carbon aerosol particles using a photoelectric sensor, and belongs to the technical field of photoelectric detection. Background technique [0002] Atmospheric black carbon aerosol is an important factor affecting the greenhouse effect of the atmosphere. Black carbon aerosol is mainly amorphous carbonaceous produced by incomplete combustion of carbonaceous substances, and the main sources are natural sources and anthropogenic sources. The content detection of black carbon aerosol and the characteristic analysis of black carbon aerosol particle diameter are of great significance to the study of the impact of black carbon aerosol on the atmospheric environment. At present, the detection methods of black carbon aerosol content include optical analysis method, chemical oxidation method, thermal oxidation me...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/08
Inventor 邹应全程珊蓉刘晓林张宏群
Owner NANJING UNIV OF INFORMATION SCI & TECH