Particulate matter concentration monitoring system on basis of mie scattering theories and method for applying particulate matter concentration monitoring system

Abstract

The invention discloses a particulate matter concentration monitoring system on the basis of mie scattering theories and a method for applying the particulate matter concentration monitoring system. The particulate matter concentration monitoring system comprises a transmitting end, a receiving end and a single chip microcomputer system. The transmitting end comprises four laser devices with different wavelengths, a laser driving module and a first signal processing circuit module, the laser devices are provided with PD (potential difference) output ends, the light intensity of emergent laser light of the laser devices can be fed by the PD output ends, and accordingly errors due to change of the emergent light intensity can be corrected; beam expansion mirrors are arranged at the fronts of the laser devices; a first signal processing circuit is used for providing modulation signals for the laser devices, acquiring signals of the PD output ends and uploading the signals to the single chip microcomputer system; the receiving end comprises light intensity receiving assemblies and a second signal processing circuit, silicon photovoltaic cells are used as photoelectric conversion components of the light intensity receiving assemblies, and closed light path systems are formed by the light intensity receiving assemblies, condensing mirrors and filters. The particulate matter concentration monitoring system and the method have the advantages of zero contact, wide range, real-time measurement, accuracy, reliability and convenience in use.

Description

technical field

[0001] The invention relates to the technical field of dust particle concentration measurement, in particular to a particle concentration monitoring system based on mie scattering theory and a method for using the same. Background technique

[0002] The sources of particulate matter in the atmosphere are complex. The research results show that dust is one of the important factors causing atmospheric particulate matter pollution, and its sources are mainly roads, construction sites, dock yards, etc. The dust particle size range is large and the concentration changes rapidly. Therefore, the monitoring of dust changes requires a method with a wide range of applications, fast measurement speed, and online real-time measurement.

[0003] The methods currently used to monitor the concentration of particulate matter are mainly the traditional β-ray method and the oscillating balance method. On the one hand, these two methods require sampling, and the measurement acc...

Examples

Embodiment Construction

[0020] In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] Such as figure 1 As shown, the embodiment of the present invention provides a particle concentration monitoring system based on the mie scattering theory, including a transmitting end, a receiving end, a single-chip computer system and a 3G communication module, and the transmitting end is composed of a laser, a laser driver module, a first signal processing The circuit module is composed of four lasers with different wavelengths, all of which are equipped with PD output terminals to feedback the laser output laser intensity to correct the error caused by the change of the output light intensity; a beam expander is installed in front of t...

technical field

[0001] The invention relates to the technical field of dust particle concentration measurement, in particular to a particle concentration monitoring system based on mie scattering theory and a method for using the same. Background technique

[0002] The sources of particulate matter in the atmosphere are complex. The research results show that dust is one of the important factors causing atmospheric particulate matter pollution, and its sources are mainly roads, construction sites, dock yards, etc. The dust particle size range is large and the concentration changes rapidly. Therefore, the monitoring of dust changes requires a method with a wide range of applications, fast measurement speed, and online real-time measurement.

[0003] The methods currently used to monitor the concentration of particulate matter are mainly the traditional β-ray method and the oscillating balance method. On the one hand, these two methods require sampling, and the measurement acc...

Examples

Embodiment Construction

[0020] In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] Such as figure 1 As shown, the embodiment of the present invention provides a particle concentration monitoring system based on the mie scattering theory, including a transmitting end, a receiving end, a single-chip computer system and a 3G communication module, and the transmitting end is composed of a laser, a laser driver module, a first signal processing The circuit module is composed of four lasers with different wavelengths, all of which are equipped with PD output terminals to feedback the laser output laser intensity to correct the error caused by the change of the output light intensity; a beam expander is installed in front of t...

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