本课题要求对水位检测系统的原理和GMS技术作一定的了解，结合给定的设计要求，设计一个完成一个基于GSM短信模块液位检测系统。系统的检测对象为液位，当水位低于或高于给定的设定水位时，液位传感器检测到后，信息会经单片机处理后，并通过GSM短信模块，发送信息到用户手机上。

（2）　　本毕业设计的相关要求：

1、　　系统带有液晶显示提示操作信息，并显示液位信息，并有键盘作为输入设备；

2、　　液位的报警值上限和下限可以通过键盘设置；

3、　　当液位超过设置的报警上限值或下限值时，系统会发送短信到用户手机上。

4、　　短信内容要有相应的提示信息，比如液位超过上限值或者低于下限值，液位信息等。

-The topic of the principles and requirements of GMS technical level detection system for a certain understanding, combined with a given design requirements, design a GSM SMS module to complete a level detection system. Object detection system for liquid level, when the water level is below or above a given set level, the level sensor is detected, the information will be processed by the microcontroller and by GSM SMS module, send the information to the user s mobile phone.

(2) The design of graduation requirements:

1, the system prompts with LCD information and displays the level of information, and there is a keyboard as an input device

2, the level of alarm value upper and lower limits can be set via the keyboard

3, when the upper or lower limit exceeds the set alarm level, the system will send text messages to mobile phone users.

4, the message content must be appropriate message, such as the level exceeds the upper limit or below the lower limit, the level information.