Real-time Monitoring of Exhaust Fan Operation Status in a Livestock House Using Image Analysis
文献类型： 会议论文
第一作者： Luyu Ding
作者： Luyu Ding 1 ; Yang Lv 2 ; Qifeng Li 1 ; Ligen Yu 2 ; Ronghua Gao 1 ; Weihong Ma 2 ; Qinyang Yu 1 ;
作者机构： 1.National Engineering Research Center for Information Technology in Agriculture,Beijing 100097,China
2.Beijing Academy of Agriculture and Forestry Sciences,Beijing 100097,China
关键词： Variable frequency fan;ventilation rate;running state;image processing;dense optical flow;Hough transform
会议名称： International Symposium on Animal Environment and Welfare
主办单位：
页码： 334-341
摘要： Real-time monitoring of fan operation status is helpful to supervise and regulate the ventilation rate in a mechanical ventilated livestock house.This study tried to monitor the operation state including fan position and ventilation levels of frequency adjustable fans in a pig house with image processing and mathematical modelling.Hough transform was used to locate the position of the fan,the motion of pixels obtained from the image of running fans were calculated with dense optical flow.The dense optical flow data in the Cartesian coordinate system was converted in polar coordinates,and the fan operation status was judged by the relationship between the threshold value and the polar diameter.The numerical characteristics of dense optical flow data were extracted and examined for curve fitting to obtain the airflow rate of exhaust fan at different operating levels(15,25,35,and 50 Hz).Ventilation rates were effectively estimated when fans ran under 70％of the maximum power(50 Hz; 18,000 m3 h-1).At this condition,the average error of ventilation rate monitored using the method in this study was 1.84％(115.30 m3 h-1).The detection accuracy of the fan running status reached 99％,and all fans in sight of the camera could be monitored at the same time.This study provided a new approach to monitor the operation status of exhaust fans using video and image analysis.
分类号： s8
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