Research On COFDM Wireless Command System For Mine Rescue Based On KTE5 System

Coal mine safety production accidents and natural calamities occur frequently in our nation, coal mine emergency rescue take great responsibility. Conditional and environmental danger and complexity of disaster-stricken area under coal mine decelerate the development of coal mine rescue telecommunication technology which can not effectively reflect the real circumstance of disaster stricken area during rescue procedure. Therefore, it influences commanding decisions during rescue in certain degree.KTE5 type mine rescue command unit is the visual comparison of the leading mine emergency rescue.this study is based disaster special environment to the original KTE5 system uses COFDM modulation technology as well as DSP (digital signal processor) chip as the main hardware of the circuit module, wireless video/audio transmission.First, according to mine environment, transport requirements, select TMS320VC540 as a core DSP processing devices, to achieve the modulation and demodulation process of convolution encoding and decoding in addition to all the work outside, and the A / D, D / A process of communication and data storage work. So as to make underground wireless data and suitable treatment system in the original equipment remains basically unchanged, under the premise of the underground to achieve the wireless transmission of data, and the picture clarity and data transfer speeds are greatly improved. Greatly improve the efficiency of relief work.Then, the design of a data transmission module and receiver module, and KTE5 front-end equipment and the wireless sending and receiving modules and effective communication, so that the collected video / audio data to be accurate, and timely delivery to the underground base and the ground command center, and with the original system, access to good equipment. Makes the command of the ground the first time information can be sent to the disaster area.Finally, and devices used in underground explosion-proof design of the safety, so that sending and receiving wireless data modules adapted to use the coal mine environment.In the original equipment of the system remains basically unchanged, under the premise of the underground to achieve the wireless transmission of data and images, and the screen resolution and data transfer speeds are greatly improved, greatly improved the efficiency of rescue work.