文章以LTC4364作为核心器件,实现了航空磁力仪的电源过压、欠压、过流和极性反接的保护电路,并在发生过压或过流情况时,输出故障指示信号。该电路输出的故障指示信号,提醒飞行员测量设备故障,及时返航,减少了设备因电源故障带来的损失。该电路已在航空磁测无人值守系统上应用,减少了损失,提高了工作效率。 The article takes the LTC4364 as the core device to realize the protection circuit of overvoltage, undervoltage, overcurrent and reverse polarity of the air magnetometer, and outputs the fault indication signal in case of overvoltage or overcurrent. The circuit output fault indication signal, to remind pilots to measure equipment failure, return promptly, reducing the equipment loss due to power failure. The circuit has been unmanned aerial magnetic system on the application, reducing losses and improve work efficiency.