The Research Of Emergency Wireless Voice System Of Mine Based On Internet Of Things

As the mining industry, coal mine safety is critical to the miners, it could bring huge economic losses to the enterprise. All countries in the world really do lots of research in the areas of mine safety and made some achievements. The existing mine monitoring technology has a certain role in environmental monitoring, but monitoring network is unable to cope with the sudden accident of the underground damage.When we are most in need of information caused by accidents in downhole situation, however, the monitoring system paralyzed and unable to work, which carry out difficulty to the rescue work.This paper studies in the Bluetooth technology and Zigbee network technology,and think that the ZigBee technology has low power, flexible networking and self-healing ability, low cost, so it is suitable for the underground environment. With the wide application of Bluetooth technology, the ZigBee technology has irreplaceable advantages in the terminal access. Due to lack of Zigbee network in the transmission rate, this paper do research in the working principle of several simple voice compression encoding algorithm, combined with the system needs to select the adaptive differential pulse ADPCM encoding algorithm as a system of speech compression algorithm. Based on Zigbee wireless communication technology and Bluetooth technology, we use this new method as the voice of emergency rescue system for underground transmission network.According to the difference of the frequency of the signal transmission, the system transfers the signal type is divided into a main signal level and the secondary signal, continuous transmission of environment monitoring data and information as the primary signal, speech signal into secondary signals, usually work priority to meet the bandwidth of the primary signal, when the accident occurred artificially switching signal priority, to ensure that the voice signal transmission bandwidth. We choose chip CC2530 as the ZigBee module, CC2540 as Bluetooth module and Samsung micro2440 development board as ZigBee, Bluetooth gateway hardware platform to build mine emergency wireless voice system, and through the function simulation test of the system can meet the bandwidth requirements of voice communication. In practical application combined with parameter monitoring and personnel positioning can provide help for the relief efforts after the accident.