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当前位置: 首页 > 文章 > 低速智能农业车辆多分辨率自适应测速系统设计 农业机械学报 2013,44 (2) 159-164
Position: Home > Articles > Design of Multiresolution Adaptive Speed Measurement System for Low-speed Intelligent Agricultural Vehicle Transactions of the Chinese Society for Agricultural Machinery 2013,44 (2) 159-164

低速智能农业车辆多分辨率自适应测速系统设计

作  者：
田光兆;安秋;姬长英;顾宝兴;王海青;赵建东
单  位：
南京农业大学工学院
关键词：
农业车辆;多普勒雷达;多分辨率;自适应测速;CAN总线;可变滑窗灰色预测
摘  要：
根据智能化农业车辆低速工作的特点,采用CAN总线通信技术和多线程技术,设计并实现了基于脉冲式多普勒雷达的智能测速系统。通过速度分级和可变滑窗灰色预测,为系统建立了多分辨率自适应机制,在保证测量精度的同时降低其对系统资源的消耗。试验表明:启动分辨率自适应机制后,车辆速度为0.2 m/s时,测量平均误差为1.45%,分辨率发生器工作频率降低76.7%;车辆速度为0.8 m/s时,测量平均误差降低到0.61%,分辨率发生器工作频率降低90.0%。变速运动过程中,能够获得9.6 Hz的稳定输出频率,同时大幅降低分辨率发生器工作频率。
译  名：
Design of Multiresolution Adaptive Speed Measurement System for Low-speed Intelligent Agricultural Vehicle
作  者：
Tian Guangzhao An Qiu Ji Changying Gu Baoxing Wang Haiqing Zhao Jiandong(College of Engineering,Nanjing Agricultural University,Nanjing 210031,China)
关键词：
Agricultural vehicle Doppler radar Multiresolution Adaptive speed measurement CAN bus Variable sliding-window gray prediction
摘  要：
A pulse Doppler radar based real-time speed measurement system was designed by using CAN bus communication technology and multithreading technology according to the low speed characteristic of intelligent agricultural vehicle.In order to obtain a high precision result with the least system resource consumption,the multiresolution adaptive policy was designed by dividing speed level and variable sliding-window gray prediction.Experiments showed that the average error was 1.45% and the working frequency of resolution generator was reduced by 76.7% after adaptive policy started when the speed of vehicle was 0.2 m/s.The average error was 0.61% and the working frequency of resolution generator was reduced by 90.0% after policy started when the speed of vehicle was 0.8 m/s.The output frequency of system was steady 9.6 Hz and the frequency of resolution generator was dramatically reduced during variable speed movement.

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