Flying dust concentration detection device and flying dust detection method
A technology for concentration detection and detection method, which is applied in measurement devices, suspension and porous material analysis, particle suspension analysis, etc., and can solve the problems of low civil use, high cost, limited measurement effect and accuracy
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[0037] This patent uses the combination of SSD (single shot multibox detector) algorithm and SAPD (soft anchor-point object dectection) algorithm to measure
[0038] In the SSD algorithm, VGG16 is used as the basic model, and then a convolutional layer is added on the basis of VGG16 to obtain more feature maps for detection.
[0039] The network structure of the improved SSD algorithm used in this patent is as follows: Figure 14 As shown, multi-scale feature maps are used to achieve the goal of detection.
[0040] This patent uses VGG16 as the basic model, and converts the fully connected layers fc6 and fc7 of VGG16 into 3×3 convolutional layers conv6 and 1×1 convolutional layers conv7 respectively, and the pooling layer pool5 is changed from the original 2×2-s2 becomes 3×3-s1.
[0041] Further, in order to expand the field of view of convolution exponentially without increasing the complexity of parameters and model, conv6 adopts dilated convolution or atrous convolution, ...
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