Dust sampling and incremental control system

Abstract

The invention discloses a dust sampling and incremental control system which is characterized by comprising a filtration membrane sampling device, a laser optical measuring device and a mixed signal processor, wherein the filtration membrane sampling device comprises a sampling head, a flow sensor and an air pump I, the sampling head is connected with the air pump I, and the flow sensor is arranged between the sampling head and the air pump I; the laser optical measuring device comprises an optical sensor, an air filter and an air pump II, and the optical sensor is provided with a slit and a measurement chamber; and the flow sensor, the optical sensor and a temperature and pressure sensor are respectively connected with the mixed signal processor which is respectively connected with the air pump I and the air pump II. Compared with the prior art, the dust sampling and incremental control system has the advantages that the weight increment in dust filtration membrane sampling can be controlled through the optical measuring system, and thus the pass percent of dust samples is ensured; and the optical measuring system can respectively measure total dust concentration and respirable dust concentration.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a dust sampling increment control system. Background technique [0002] At present, the dust samplers used and sold at home and abroad use higher technology in terms of constant flow, but because the occupational health standards stipulate that the dust concentration detection in the workplace must use the filter membrane weighing method, and the weight of the filter membrane is increased. Corresponding regulations have also been made, but neither the sampler itself nor the testing personnel can accurately judge the weight gain of the dust filter membrane with the naked eye. Through novelty checks and consultation with some occupational health experts, there is currently no method and equipment for measuring dust concentration by the filter membrane weight gain method that can automatically judge the filter membrane weight gain and automatically control the sampling time a...

AI Technical Summary

Problems solved by technology

[0002] At present, the dust samplers used and sold at home and abroad use higher technology in terms of constant flow, but because the occupational health standards stipulate that the dust concentration detection in the workplace must use the filter membrane weighing method, and the weight of the filter membrane is increased. Corresponding regulations have also been made, but neither the sampler itself nor the testing personnel can accurately judge the weight gain of the dust filter membrane with the naked eye

Through novelty checks and consultation with some occupational health experts, there is currently no method and equipment for measuring dust concentration by the filter membrane weight gain method that can automatically judge the filter membrane weight gain and automatically control the sampling time according to the filter membrane weight gain.

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