Self-heating regeneration type laser scattering method particulate matter sensor

Abstract

The invention provides a self-heating regeneration type laser scattering method particulate matter sensor. The self-heating regeneration type laser scattering method particulate matter sensor comprises a sensing device, a laser transmitter and a laser receiver. A supercharger is arranged in the sensing device, an air inlet is formed in the surface of the supercharger, a guide-out opening is formed in the surface of the supercharger, and a monitoring channel is formed in the sensing device. The self-heating regeneration type laser scattering method particulate matter sensor is based on the cooperative use of the supercharger and the heat conduction pipe. During operation, heat generated by a supercharger can be used for automatically heating the ceramic layer; through the design of the glass layer and the carbon layer, particles on the surface of the carbon layer can be subjected to desorption treatment, and meanwhile regeneration of the carbon layer is achieved. Therefore, the particulate matters can be prevented from being adhered and accumulated in the sensing device, so that the automatic treatment of the particulate matters in the sensing device is realized, and normal monitoring work of the sensing device is guaranteed.

Description

technical field [0001] The invention relates to the technical field of mobile machinery tail gas detection, in particular to a self-heating regeneration type particle sensor by laser scattering method. Background technique [0002] When the mobile machinery is running, most of them use chemical raw materials such as gasoline and diesel as the driving raw materials. When the mobile machinery is working, it will generate a large amount of exhaust gas. The exhaust gas contains harmful gases and solid particles. In order to monitor the particles in the exhaust gas, it will A particle sensor is set in the exhaust passage of the exhaust gas, and the laser particle sensor uses the principle of laser light scattering to monitor the particles in the exhaust gas. [0003] When the laser particle sensor monitors the particles in the exhaust gas of mobile machinery, the particles will continue to adhere to the sensor and accumulate continuously. In order to enable the laser particle sen...

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Problems solved by technology

[0003] When the laser particle sensor monitors the particles in the exhaust gas of mobile machinery, the particles will continue to adhere to the sensor and accumulate continuously. In order to enable the laser particle sensor to monitor the particles in the exhaust gas normally, the existing laser particle sensor It needs to be processed regularly, the cleaning and maintenance of the sensor is inconvenient, and it will affect the effect of exhaust gas supervision

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