Construction site raising dust detecting device based on digital holography

Abstract

The invention discloses a construction site raising dust detecting device based on digital holography. The device comprises a computer, a light source, a pinhole, an optical filter and an array type detector. A novel method of digital holography is introduced according to requirements for rapid and multi-parameter detection of construction site raising dust; the detecting device with a simple structure is used for recording a hologram, the computer is used for simulating the optical diffraction process and analyzing the hologram, a three-dimensional image of a raising dust particle distribution area is acquired, the raising dust particle concentration information and granularity information are extracted, the dust particle spatial concentration and the granularity distribution are rapidly detected, and various demands in actual application are met.

Description

technical field [0001] The invention relates to the field of construction site dust detection devices, in particular to a construction site dust detection device based on digital holography. Background technique [0002] At present, particulate matter has become the primary pollutant of urban air pollution in my country. Among them, the proportion of particulate matter from construction sites in the total atmospheric particulate matter is increasing year by year, and has become one of the main factors causing urban air pollution. In recent years, my country, especially the central and western regions, is in the peak period of urban infrastructure construction. The construction site dust generated by construction, demolition, road construction, material stacking, transportation and other construction processes has continued to increase. Among them, management measures are not perfect, resulting in The emergence of extensive construction is an important reason for the continuou...

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Problems solved by technology

[0003] At present, the detection of dust on construction sites mainly adopts two methods: sampling method and non-sampling method. Sampling methods mainly include weighing method, β-ray absorption method, piezoelectric crystal oscillation method, etc., which have high detection accuracy. Collecting dust samples from the construction site in advance limits the detection speed, and the detection equipment has high operating requirements and harsh environmental requirements, which cannot meet the needs of on-site detection; the non-sampling method mainly measures the concentration of dust particles on the construction site based on the principle of laser scattering, although It has a fast detection speed and meets the needs of on-site detection, but the scattering method can only obtain the concentration information of particles, that is, the number of particles in the space, and a single detection parameter can no longer meet the needs of increasing particle detection requirements

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