小型无人机活塞式发动机测控仪设计

Design of measurement and control instrument for piston engine of small unmanned aerial vehicle

为实现小型无人机活塞式发动机的机载和内、外场调试与测试,基于Freescale 16位双核微控制器设计便携式发动机测控仪。测控仪控制发动机节气门和停机,定时器中断触发A/D转换进行数据采集,液晶屏显示被测参数,并通过以太网通信接口将数据传输至数据管理系统。后台管理软件以图表形式显示被测参数,计算并绘制曲线。实验结果表明:测控仪可以满足发动机运行控制、多参数测量和高速数据传输的要求。

In order to realize airborne, infield and outfield debugging and testing for small unmanned aerial vehicle( UAV), a portable engine measurement and control instrument is designed based on a Freescale microcontroller of 16 bit dual core. The throttle valve is controlled by the instrument which can achieve the shutdown of the engine. The data acquisition is performed by a timer interrupt to trigger A/D conversion. The measured parameters are displayed by a LCD screen and the parameters are transferred to the data management system through the Ethernet communication interface. The measured parameters are also displayed in the form of graphs, and the parametric curves are drawn through calculation by the background management software. The experimental results show that the measurement and control instrument can meet the requirements for engine operation control, multi-parameter measurement and high-speed data transmission.