无人机多通道实时测温系统设计

Design of Multi-Channelreal-Time Temperature Measurement System for UAV

针对目前无人机因未能实时有效监测温度,致使机舱温度失衡而导致飞控系统故障的技术难题,提出了一种模块化测温方法,对不同机舱进行独立测试,基于FPGA的可编程特性,设计了低功耗、多通道机载实时温度监控采集存储系统.制作了温度信号调理模块、CAN接口通讯模块以及FLASH存储模块电路,既可以将温度数据实时传输到飞控系统,又便于操作人员对无人机飞行温度状态进行回读分析.用上位机模拟飞控读数系统进行系统验证,实验结果表明,该系统在-60℃~200℃之间可以稳定工作,误差≤0.2℃,目前已投入使用,为机载环境温度的实时监控提供了一种可靠的解决方案.

Aiming at the current technical problem of flight control system failure due to the unbalance of cabin temperature caused by the failure of real-time and effective temperature monitoring of UAV,a modular temperature measurement method is proposed,which can be independently tested on different engine.Based on programmable features of FPGA,low power consumption,multi-channel airborne real-time temperature monitoring acquisition and storage system was designed,and temperature signal conditioning module,CAN interface communication module and FLASH memory module circuit were fabricated,which can not only transmit the temperature data to the flight system in real time,but also facilitate the operator to read back and analyze the temperature state of UAV flight.The system was verified in host system of the simulation flight control reading system,and the experimental results showed that the system has good accuracy in the range of-60℃~200℃and the error is less more or equal to 0.2℃,which provides a reliable scheme for the monitoring of aircraft cabin temperature.