Multi-spectral back scattering type soot grain size and concentration measuring device and measuring method thereof

A backscattering and concentration measurement technology, applied in the field of environmental pollution monitoring, can solve problems such as complicated installation, poor effect, and little change in light intensity

Inactive Publication Date: 2012-08-15
HARBIN ENG UNIV
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Problems solved by technology

However, the detector and the light source of the forward scattering method and the edge scattering method are still placed separately, so the installation is complicated and the angle is required to be precise; while the currently commonly used turbidity method has little change in light intensity w

Method used

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  • Multi-spectral back scattering type soot grain size and concentration measuring device and measuring method thereof
  • Multi-spectral back scattering type soot grain size and concentration measuring device and measuring method thereof
  • Multi-spectral back scattering type soot grain size and concentration measuring device and measuring method thereof

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Embodiment Construction

[0021] The present invention will be further described below with examples in conjunction with the accompanying drawings, but the protection scope of the present invention should not be limited by this.

[0022] The core of the present invention is: after the wide-spectrum light source enters the flue through the reflective optical fiber, it has a scattering effect with the smoke particles, wherein the backscattered light is obtained through the reflective optical fiber probe, and the backscattered multi-spectral light intensity signal is obtained through the spectroscopic device. The data acquisition system uploads this signal to the PC in real time, and performs data processing on the obtained information through the neural network algorithm in the non-independent mode, and inverts the particle size and concentration, so as to realize the simultaneous measurement of the smoke particle size and concentration in real time .

[0023] The inversion algorithm for simultaneous mea...

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Abstract

The invention belongs to the field of environmental pollution monitoring, and particularly relates to a multi-spectral back scattering type soot grain size and concentration simultaneous measuring device and a measuring method thereof. Visible light emitted from a wide-spectrum light source is emitted into a flue via an illuminating optical fiber in a reflecting type optical fiber probe, and is scattered by soot in the flue so as to form scattered light, the scattered light enters a readout optical fiber via dustproof glass with a fixed-period purging device, and is split by a light splitter, multi-spectral light intensity information of the back scattered light is acquired by a linear array CCD (charge coupled device), and a signal acquisition and data processing portion realizes modeling, inverting and monitoring. A detector of the measuring device can be integrated with the light source, angle debugging is omitted, and the measuring device has higher sensitivity according to a scattering theory. The measuring method has the advantages of simple solution procedures, fast inverting speed, stable inverting results and the like.

Description

technical field [0001] The invention belongs to the field of environmental pollution monitoring, and in particular relates to a simultaneous measurement device and measurement method based on multispectral backscattering smoke particle size and concentration. Background technique [0002] Scattering occurs when light interacts with particles. The detector is installed at a certain scattering angle, and after obtaining the scattered light intensity data, the inversion of the particle size and concentration of smoke and dust is realized based on the scattering theory. The light scattering method retains the advantages of long-distance and long-term continuous measurement of emission sources in the turbidity method. However, the detector and the light source of the forward scattering method and the edge scattering method are still placed separately, so the installation is complicated and the angle is required to be precise; while the currently commonly used turbidity method ha...

Claims

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Application Information

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IPC IPC(8): G01N15/02G01N15/00
Inventor 邢键孙伟民孙晶华
Owner HARBIN ENG UNIV
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