Automatic Observation System for Debris Flow (AOSFDF for short), as a derived device from the original semiautomatic monitoring system, includes the flowing six components: ① control center, ②ground sound telemetering, ③ mud-depth telemetering, ④ precipitation telemetering, ⑤wired-mud-depth interface and ⑥ impulsive-force interface, each of which is made up with both softwares and hardwares.

The control center conduct the communication both wire-less data and voice with exterior subsystems, receives data from radioor wiredmonitors, exchange the commands and datas between the center box and PC, and set various warning parameters with computers or center box directly .Meanwhile the PC's software do some high level control, some data analysis, data processing, and so on. Furthermore, the control center is capable of visiting the work states at any time and modify all the parameters for every subsystem.

The sorftwares of control center on PC (programed with Visual C++) provide real-time control process and data analysis which work on Windows 98/NT platform. it provide a universal standard form for dada file received for being reused easily.

All of the field devices of subsystems (including precipitation telemertering, ground sound metering, mud-depthmetering, etc.) consist of the corresponding hard components, such as sensor, center processor unit, transceiver, serial process, and so on. After intelligent analysis and process, the field devices send the processed data to the control center, give the right to proceed and save data to the center for next work. The following points characterize the system: (a) All of subsystems serve the intelligent power_supply manage property, this makes it possible for the whole system to work normally in special cases (i.e. A.C. Power failure). (b) Provide the interface for old devices to transform or communicate with digits, made the system through uniform communication protocol, capable of concert working and ensuring the integrity and unity for various data. (c) The control center, besides supporting all of subsystems, offers uniform commands and data interfaces. (d)The parameters of subsystems can be modified either on the spot or through remote control by the control center. (e)The PC provides both the advanced
control manage software based on ChinesWindow software and the standard, uniform dbase files, this makes further work considerably convenient. (f) The instrument board operation function, offered by control center at comprehensive control center provides Chinese LCD menu, is capable of working normally to install warning parameters, setup datetime and read data even in case of the computer's shutdown.