Air particle counting method and device
A technology of air particle and counting method, which is applied in the direction of measuring device, individual particle analysis, particle and sedimentation analysis, etc., can solve the problem of inability to produce correct estimation of suspended particle size, limited accuracy of particle counting and size estimation, and inaccurate test results. Accuracy and other issues to achieve the effect of simple structure, low cost, good prediction and compensation
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Embodiment 1
[0037] A method for counting air particles. The laser beam and the fluid channel are perpendicularly intersected to produce scattered light. The scattered light generated is collected by two scattered light collection boards from two spatial directions at the same time; the two scattered light collection boards generate electrical signals and undergo different The subsequent signal amplifying circuits are amplified separately with different magnifications; the amplified electrical signals and amplitude distributions are statistically analyzed and processed, and the peak morphologies of electrical signals of different intensities are measured, and the number of particles of different sizes is obtained by calculation. The two scattered light collecting plates have the same size and are arranged in parallel on both sides of the fluid channel.
[0038] Since the optical signal, the electrical signal and the light collecting device are on three axes respectively, we use a three-dimensi...
Embodiment 2
[0042] The method for counting air particles provided in this embodiment is basically the same as the first embodiment, except that the amplification factor of each subsequent signal amplifying circuit is adjusted so that the amplification factor of the two subsequent signal amplifying circuits is the same. In this way, the influence of particle shape on the estimation of particle size is eliminated by calculation. When the magnification of the two light collectors is the same, the light reception is increased twice, which can reduce the energy output of the light source, reduce energy consumption, and extend the product life time.
Embodiment 3
[0044] This embodiment provides an air particle counting method, which is basically the same as the first embodiment. The difference is that there are two measurement points, the lasers irradiated at different measurement points have different wavelengths, and two laser beams with different wavelengths are used. To achieve comprehensive detection and improve the accuracy of air particle size estimation.
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