Design of Remote Monitor System of Power Supply Based on GSM

The structure and the design proposal of the remote monitor system of power supply were introduced based on SMS service. In terms of hardware design, the high-precision Hall sensor ACS704ELC was used as signal acquisition; Microchip' s high-speed CMOS processor PIC18f4585 was applied for MCU; And real-time clock chip DS1302 was adopted to record the times unusual events occurred and pack them; Then the package was transmitted to public network GSM by message module TC35i. As to software, PDU(ProtocolDataUnit) mode, the encoding mode of which is 7bit, was used during transmitting SMS. Transmitting and receiving SMS was realized by using AT command. TC35i module' s initialization and the design software of the SMS processing module was the focus to be introduced. The monitor system can be embedded to large industrial monitor and control or unmanned system by use of SMS shortcut performance and comparatively low cost charge of GSM -nubile communication net. It is a real time system with high reliability, convenient maintenance and good stabilization. The hardware and software design was described in detail, including the system principle, the program and the design of the circuit a-bout this monitor system. This system will be well used in the needed field which required less data tran-mission and dispersed detecting point. The system is stable according to practical experience.