Particulate matter concentration detection device and method

Abstract

The invention discloses a particulate matter concentration detection device and method. The detection device comprises a measurement unit, a reference correction unit and a controller connected with the measurement unit and the reference correction unit. The measuring unit comprises a light source for emitting laser to the to-be-measured particles and a second optical probe for receiving scatteredlight signals scattered by the to-be-measured dust particles, converting the scattered light signals into dust concentration signals and sending the dust concentration signals to the controller. Thereference correction unit comprises a first optical probe and an optical splitter which is used for dividing the light source into two optical paths. One light beam split by the optical splitter is emitted to dust particles to be detected, and the other light beam is received by the first optical probe, converted into a reference electric signal and sent to the controller. The controller is connected with the first optical probe and the second optical probe and used for receiving the reference electric signal and the dust concentration signal and obtaining a dust particle concentration signalthrough the reference electric signal and the dust concentration signal.

Description

technical field [0001] The invention relates to a particle concentration detection device and a detection method. Background technique [0002] With the rapid development of the national economy, many fields of industrial production, such as coal-fired power plants, cement, etc., will emit smoke and dust into the atmosphere during the production process, resulting in increasingly prominent environmental pollution, causing serious damage to people's lives and health. adverse effects. Therefore, it is urgent to limit the emission of soot concentration, and the real-time monitoring of dust provides data support for limiting emission. At present, the industrial measurement mainly adopts the laser scattering method, and the in-situ installation method is used for measurement at the industrial site. Due to the harsh environment of the site, it will have a certain impact on the dust equipment and affect the measurement accuracy. This is especially evident when measuring low conce...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a particle concentration detection device to solve the problem that the laser scattering dust meter is prone to measurement errors due to interference from external factors such as ambient temperature, humidity, and pressure on the measurement signal during the working process.

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