设计的酒精浓度检测系统，可实现以下功能：

1、当有特殊情况时可按紧急报警键报警，也可手动取消紧急报警功能。

2、平时可设置酒精浓度和高温报警值，其中酒精浓度有1—9级，环境温度有0--99度，可根据需要设置同时系统的按键还具有连加、减功能，操作起来非常方便，系统还能够在进入设置界面后，如果没有按键按下30秒后会自动退出设置界面。并且有掉电保存功能，设置的参数保存在单片机内部EEPOM中。

3、当MQ-3传感器检测到酒精时，信号由ADC0832进行模数转化得到数字信号，接着传送到AT89S52控制器中处理，当检测到浓度超过设置的酒精浓度时，蜂鸣器会发出报警声。

4、当检测到的温度超过设定的报警温度的时候，蜂鸣器将产生报警声。-Alcohol concentration detection system design can achieve the following functions:

       　1, there are special circumstances when an emergency alarm button alarm can also be manually cancel the emergency alarm.

       　2, usually alcohol concentration and temperature can be set alarm values​ ​ , which have 1-9 alcohol concentration level, ambient temperature 0- 99 degrees, the system can simultaneously connect buttons also have to add, subtract function according to their needs, the operation is very convenient the system is also able to enter the setting interface, the interface will automatically exit the setting after 30 seconds if no button is pressed. And power-down save function, parameter settings are stored in the internal microcontroller EEPOM.

   　3, when the MQ-3 sensor detects alcohol, the signal from the analog to digital conversion ADC0832 get a digital signal, and then transferred to the AT89S52 controller proce