接触网在线监测(2)

locations and exits all the time in the network. The rest are scatted monitor modules,which are dynamic and they could be mobile equipments, they would join the network when they are needed. Every unit has its unique identity and has both data acquisition function and data communication function.

IV. ENERGY SUPPLY OF MODULE

There are many kinds of power supply mode for on-line monitor equipment, such as battery, solar energy, laser energy supply and extraction power from overhead wire etc[4]. The solar energy would be influenced by climatic conditions and

The continuous monitor modules use ZigBee network to lack of long-term maintenance-free operation capability, the communicate, they could only communicate with their laser energy supply isn't suit for outdoor use, so the other two

modes should be considered here. neighbouring monitor modules. So if one module would like to

send some data to the local monitor centre, it has to use the The monitor module can be designed very smart when use monitor modules between them as relays. For scatted battery, it's fit to be installed on the contact line because of the modules,because of their mobility they would use ZigBee or GPRS to communicate. All the modules form the wireless sensor network. Every monitor module consists of two modules: data acquisition module and communication module. In the data acquisition module, there would be some sensors connected to Micro Control Unit(MCU), through which data from the sensors would be processed. Inside the communication module, there is a transceiver for data communication. Figure. 2 is the hardware structure of the monitor module.

Figure. 2 Hardware structure of the monitor module

In every traction substation,there is a local monitor centre, which could communicate with all of the monitor modules directly or indirectly. So local monitor centre could send orders to them and get data from them.

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