An intelligent monitoring system is proposed, based on the acceleration sensor and GSM message communication platform, which is able to detect falling of human body, automatically send text messages and alarm in an emergency to realize telemonitoring of home-bound elders in an unexpected accident. The system is made up of three modules, thereinto the cores of the acquisition module, communication module and control module are respectively TC35 SIEMENS module, MMA7260QT acceleration sensors and low power consumption MCU STC12LE5204AD. Using AT instructions, it can control the GSM module automatically and send messages for help just with single-chip microcomputer. The experiment proves that this monitoring system can effectively provide reliable guardianship for the aged. It has practical significance in guaranteeing the safety of the aged.%提出了基于MEMS和GSM短信沟通平台的检测人体跌倒、自动发送手机短信报警以及紧急呼救的智能监护系统,以实现对居家老人的远程监护和突发意外的及时警报.系统由三大模块组成,其中采集模块、通讯模块和控制模块分别为SIEMENS TC35模块和MMA7260QT加速度传感器以及低功耗单片机STC12LE5204AD,采用AT指令程序实现单片机控制GSM模块自动发送跌倒求救短信.该系统较一般检测算法不同:对人体进行动静态姿势分类,自动检测是否进入省电模式并启用随时唤醒机制；预设的紧急报警按钮使用户能够及时自主求救.实验证明,基于MEMS和GSM的老人监护系统能够及时有效地对居家老人进行可靠监护,对保障老人生命安全具有重要应用意义.
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