Online spraying quality assessment system of plant protection unmanned aerial vehicle based on Android client

文献类型： 外文期刊

第一作者： Xu, Yang

作者： Xu, Yang;Xue, Xinyu;Sun, Zhu;Chang, Chun;Gu, Wei;Chen, Chen;Jin, Yongkui;Peng, Bin

作者机构：

关键词： Plant protection UAV; Online assessment; Spraying quality; Android client; External Microphone; Endpoints extraction; Double-threshold; Gaussian Filtering

期刊名称：COMPUTERS AND ELECTRONICS IN AGRICULTURE （ 影响因子：5.565； 五年影响因子：5.494 ）

ISSN： 0168-1699

年卷期： 2019 年 166 卷

页码：

收录情况： SCI

摘要： We develop an online spraying quality assessment system of plant protection unmanned aerial vehicle (UAV) based on Android Client. The built-in location and motion system of mobile phone are used to acquire the GPS data, speed and height of the UAV placed with Android mobile phone. A pump operation endpoints extraction model based on double-threshold method is developed to determine the pump operation status (on/off) during UAV flight. Adaptive Gaussian Filtering is employed to improve the positioning accuracy. Some assessment indexes including overlap spray and blank spray rates indicating plant protection UAV spraying quality are proposed in this paper. The test results show that: (1) the max deviation of the beginning/end point extracted by double-threshold model is 2 s, and the max deviation of total operation time is 4 s; (2) adaptive Gaussian Filtering can effectively improve the accuracy of static and dynamic positioning. We take filter parameter sigma = 1, to decrease the measured dynamic positioning deviation and avoid clear reduction of measured total distance (when sigma > 1) by smartphone; 0 when (3) = 1, the difference values of effective spray rate, the overlap spray rate and the blank spray rate between smartphone measuring and UAV recording are only 1.08%, 0.68 %and 1.07%, respectively.

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