Research On The Wireless Communication System Of Coal Mine Rescue Robots

After accident occurred in the coal mine, rescue robots can go down the mine and bring back all the environment and image information, which could help rescuers implement rescue work quickly and precisely. This paper focused on the wireless communication and data transmission technologies used in coal mine rescue robots system, the systems based on CC1100 module controlled by SCM(Single Chip Microcomputer) and based on WIFI are designed.The wireless communication system based on CC1100 module controlled by SCM was designed. In the hardware aspect, the high performance and low power microcontroller ATmega16L is used as the master control chip, and combined with the CC1100 wireless communication module, the robot's bidirectional information transmissions is completed. Data transmission between PC and SCM is through the RS232 bus, SCM controls CC1100 through the SPI bus to receive and dispatch data. In the software aspect, the ATmega16L software is developed in ICCAVR compiler, including configure and control CC1100 through SPI bus, and Serial Port communication program on the SCM. The host computer program is compiled in Visual C++ compiler which mainly analyze and store all kinds of data, exchange all the information and so on.The communication system based on WiFi adopts 802.11n protocol, this system is built by two PCs and a wireless router. Through building a Client/Severs model, data is exchanged and stored between two rescue robots. This system has higher transmit speed, it reached 2Mbit per second for the environment date and images obtained in the coal, and the real-time data transmission is ensured. In the mean time, a third party remote operate function is carried out, and the rescuer can control the robots in a distance so that they could finish the rescue job quickly and safely. The experiments show that the system based on SCM has a better penetrability, however, its transfer speed is slower. The system based on WiFi has a better data transmit speed and stability, and larger signal transmit scale in the straight tunnel, but its penetrability is worse.