Target detection method for bubbles in plate heat exchanger
A plate heat exchanger and target detection technology, which is applied in neural learning methods, instruments, characters and pattern recognition, etc., can solve the problems of large calculation amount, complex operation process and high experience requirements of the sliding window method, and improve the overall recognition accuracy. , The operation process is simplified, and the effect of solving the large amount of calculation is solved.
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[0054] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the schematic embodiments and descriptions are only used to explain the present invention, but not as improper limitations to the present invention.
[0055] A target detection method for air bubbles in a plate heat exchanger, see figure 1 , first use a high-speed camera to shoot a video of two-phase flow in a specific flow channel, and after decomposing the video into single-frame pictures, select a suitable picture to make a bubble data set. Then input the training set and verification set of the data set into the YoLov3-tiny network model for training until the network converges. Then input the video to be detected into the trained network model to get the prediction result, and use the improved three-frame difference method to detect the bubbles of the video. Finally, the IoU screening algorithm is used to remove the repeated candi...
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