Suspended particulate matter mass concentration real-time detection device, and measuring method

Abstract

The invention discloses a suspended particulate matter mass concentration real-time detection device. The suspended particulate matter mass concentration real-time detection device comprises a photoelectric sensor, a voltage amplitude discriminator, an FPGA multi-channel acquisition module, a microprocessor module, a liquid crystal display module, a humidity sensor module, and a power module; signals collected by the photoelectric sensor are transformed into voltage signals via a signal adjusting circuit, and the voltage signals are send to the voltage amplitude discriminator; the voltage amplitude discriminator is connected with the FPGA multi-channel acquisition module and the microprocessor module successively; the microprocessor module is connected with the liquid crystal display module and the humidity sensor module respectively. According to a measuring method using the suspended particulate matter mass concentration real-time detection device, after establishment of a BP neural network via particle swarm optimization, obtained weight values, threshold values, and a mass concentration calculation formula obtained via relative humidity correction are send to the microprocessor module; and the microprocessor module is used for humidity algorithm compensation of received measuring results based on the mass concentration calculation formula; so that influences of environment change on measuring results are avoided, and measuring data is optimized.

Description

technical field [0001] The invention relates to a real-time detection device and measurement method for the mass concentration of suspended particulate matter, in particular to a compensation for measurement results in a humidity environment based on a particle swarm optimization BP neural network algorithm. Background technique [0002] Atmospheric environment is an important condition for people to survive and develop, and fine particulate matter in the environment is extremely harmful to people's healthy life. At present, there are many methods for measuring particulate matter based on different working principles, mainly including filter membrane weighing method, light scattering method, piezoelectric crystal method, β-ray absorption method, micro vibration balance method, and charge method. The filter membrane weighing method is a standard method stipulated in my country. The sampling equipment of this method is cumbersome, noisy, and not easy to carry, so it is not sui...

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Problems solved by technology

The humidity in the atmosphere may be the main factor affecting these aspects. If the mass concentration of particulate matter in the atmosphere is measured in a certain humidity environment, the measurement results obtained should not be ideal, and a certain degree of error will occur.

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