Design of an adaptive wireless communication system for mine hoist

At present, mine hoist's wired communication system is complicated in wiring and maintenance, however, due to fixed transmission power, frequency and radiation direction of antenna, the mine hoist's wireless communication system has disadvantages of limited wireless communication distance, the signal cannot be flexibly covered according to shape and length of shaft, and communication signal is unstable. In view of the above problems, an adaptive wireless communication system for mine hoist was designed.The data of all equipments in the system is input through Ethernet interface, and wireless communication part adopts the adaptive antenna with automatic sensing of received signal strength, automatic adjustment of working frequency and radiation beam, which can wirelessly interconnect wireless camera,wireless telephone and other mine-used equipments, so as to realize video monitoring, data monitoring and voice communication of main equipments such as hoist, cage ear, oil cylinder, steel wire rope and hoisting sheave. When the hoist is in operating, the system can automatically adjust working parameters of the antenna located at the top of the shaft according to structure, depth and size of vertical shaft, so that the antenna can always be aligned with the moving hoist, communications equipment operating frequency and power is always in the best state, ensuring good coverage of wireless signals.The field application verifies when the hoist is in operating, the ground dispatching personnel can real-timely monitor internal conditions of the hoisting sheave, shaft, cage ears and hoist, and can realize telephone and broadcasting with the relevant personnel in the cage at any time, the image is clear, the voice communication is smooth, and the equipment power consumption is low.