此程序为毕业设计之防火防盗报警器具有MQ2烟雾报警，DS18B20温度报警，红外传感器感应人体红外，超声波感应人得进入，加上1602液晶显示等功能，同时具有蜂鸣器及LED报警-This procedure for the graduation of the fire alarm system design has MQ2 smoke alarm, DS18B20 temperature alarm, human infrared sen

测量MQ2烟雾传感器的数据并进行处理 可以进行AD转换(The data of the MQ2 smoke sensor is measured and processed to make AD conversion)