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Integration of Mobile Communication and “3S” Techniques in Electric Power Monitor System 2.4.2.2 GIS system The GIS system, which is the server host, is the center of the whole system. The basic function is to display and analyze the data. All data that come form the terminal through the GSM net will be display in the GIS system, and be analyzed dynamically. Being the extendibility of the system, the more perfect GIS system can send out the particular instruction, can manage all the electric power monitors that may diffuse over different area. It can do real-time monitor in the protean change of the power pipeline. 2.4.2.3 Database system A perfect system should have the support of the database system. Considering the safety and stabilization of the system, we choose the Oracle database system when we develop the mobile “3S” electric power profession pipeline monitor system. Oracle is the most prevalent Relational Database Management System (RDBMS) in the world. Oracle is a large relation database system that based on the SQL language. It is the most popular C/S structure database system in current. The advantage of the Oracle database is: Supporting the business processing of the huge database, multi-user, and high performance. Corresponding the general industrial standard, such as language, OS, interface, protocol. Carrying out the safety and complete control. Supporting distributed database and dealing. Having good compatibility and connection. All the data, which the GIS system received dynamically, will be stored in the Oracle database system safely. 2.4.2.4 Web-GIS system For the sake of the share of data information, our system will include the Web-GIS system. Using the Arc IMS based on the Windows IIS, the data from database can be issued through Geo-web server. For different people, the system gives them different right. 3. Key Techniques of the integration of GSM and “3S” techniques 3.1 Sensor Technique The sensor is an equipment which can transform physics and chemistry value to electric value which can easily be used. For the electric power profession pipeline monitor, we can choose different sensor according to the different requirements. Sensor is a part of the sensor system; it is the first gate of the input of the measured signal. The principle of the sensor system is shown below (fig.2).  Fig.2 The principle of the sensor system The extent of the signal inputted into sensor is very small, and intermix yawp and disturbance. For the later dealing process, we should coordinate these signals to best wave. This job will complete by amplifier, filter and other simulated circuits. In many condition, these circuits directly adjoin to sensor. The best waves are changed to digital signals, and input MCU. In actual application, we must choose different sensor to adopt the different using. 3.2 GPS technique The system including the special GPS module is to realize the function of GPS. Using the special GPS module can reduce the fever and make the monitor work long time. It has lower price, strong applicability and easy to control. It has strong ability of receiving the signal, and supports the GPS and GLONASS at the same time, so it can position more accurately. The structure of the GPS module is shown below (fig.3).  Fig.3 The structure of GPS module |