Research Of Personnel Orientation System In Coal Mine Based On MSP430

The coal plays a dominant role in primary energy in China, the coal minesthroughout the contory. However our country coal seam occurrence condition is verycomplex and all kinds of mine disaster happened frequently. How to ensure that the coalmine production safety and improve the efficiency of coal mine production management,has become one of the bottlenecks restricting the development of coal industry. Thetechnology of personnel orientation in coal mine, which makes the real-time dataacquisition and monitoring of the underground workers’ personal information anddynamic position distribution become feasible. It provides a favorable safeguard formine disaster and disaster relief becomes the focus of the industry. Therefor, it hasimportant practical significance to carry out further study of underground personnelorientation.This paper has introduced present research and development of the undergroundpersonnel orientation system at home and abroad. According to the actual undergroundenvironment，combined the radio frequency technology with CAN bus technology, apersonnel orientation system in coal Mine based on MSP430is proposed. The overallstructure of the system is introduced and the low-power solution is given. The hardwarepart mainly introduces the circuit design of the reading and writing part of theunderground sub-station, which including the master module, RF module, various typesof interface modules and LCD module. The master module uses the MSP430F449of TIas the main control chip, the chip has the advantages such as the ultra-low powerconsumption，liquid crystal drive and so on. The RF module selects the low-powerchip CC1100which can work at433MHz. Test results show that all modules have goodstability，and it can better meet the requirement of coal mine environment and lowpower consumption requirements.In addition, after the hardware debugging，the unavoidable collision problem inRFID is also analyzed detailedly. Then bring forward an improved anti-collisionalgorithm, which has better performance and can avoid the large number of conflicts ina large number of labels. The new algorithm uses a priority to shorten the retransmissiondelay, thereby reducing the number of conflicts and improving the efficiency of data transmission. The simulation result shows that the improved algorithm is more suitablefor underground personnel orientation system.