矿井提升机自适应无线通信系统设计

目前,矿井提升机有线通信系统布线繁琐、检修复杂,而无线通信系统因发射功率、频率和天线辐射方向固定,存在无线通信距离有限、信号无法根据井筒形状和长度灵活覆盖、通信信号不稳定等弊端。针对上述问题,设计了一种矿井提升机自适应无线通信系统。该系统所有设备的数据均通过以太网接口输入,无线通信部分采用接收信号强度自动感知、工作频率和辐射波束自动调整的自适应天线,可以将无线摄像仪、无线电话等矿用设备进行无线互连,实现提升机、罐耳、油缸、钢丝绳及天轮等主要设施的视频监视、数据监测及语音通信。当提升机运行时,系统根据立井井筒的结构、深度与尺寸,自动调整位于井筒顶部的天线的工作参数,使得天线能够始终对准移动中的提升机,通信设备的工作频率和功率始终处于最佳状态,保证了无线信号的良好覆盖。现场应用结果表明,提升机运行时地面调度人员能够实时监视天轮、井筒、罐耳及提升机内部状况,可随时与提升机内人员通话,图像清晰,语音通信流畅,且设备功耗低。

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.