一种汽车落水应急救护系统的设计

设计了一种基于HT66F70A型单片机的汽车落水应急救护系统，系统由供电电路、汽车落水检测电路、HT66F70A单片机电路、逃生救护报警电路4部分构成.本系统利用液位变送器测取液体压力并将其转换成电压信号输出，电压信号经过HT66F70A内部的12位A/D转换器转换成数字信号，单片机根据数字信号来控制逃生救护报警电路.该系统能够在汽车落水时启动语音报警、点亮呼救灯、显示汽车在水中的下沉深度，开启呼吸通道为乘客提供呼吸环境，并打开车窗为乘客开辟逃生通道.通过仿真测试，表明本系统具有反应灵敏、测试精度高、体积小巧、价格低廉的优点，故本系统具有很好的推广应用价值.

A kind of emergency rescue system for the car falling into the water

A kind of auto emergency rescue system was designed based on the microcontroller of HT66F70A. The system consists of a power supply circuit, auto water detection circuit, HT66F70A circuit, ambulance escape alarm circuit composed of four parts. The system uses the liquid level transmitter to measure liquid pressure and transform it into the signal of voltage output, and voltage signal is converted into digital signal by the internal conversion of HT66F70A. The system can start the voice alarm when the car falls down, lighting distress lamps, and showing that the car in the sink is in the water depth, opening the channel breathing environment for passengers, and the window for passenger emergency to exit. By simulation test, it shows that it has the very good application value with sensitive response, high precision, small volume and low cost.