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针对精确定位系统中多个定位卡与读卡器测距时存在无线信号碰撞问题,提出了一种防碰撞方法及其实现方案,通过双信道方式和时分方式保证测距无线信号与入网及通信无线信号工作在不同信道,而且不同定位卡的测距无线信号工作在不同测距时隙,彼此相互不干扰,极大地提高了读卡器并发测距容量。解决了测距无线信号碰撞问题,提高了测距成功率和定位精度。
A collision avoidance method and its realization scheme are proposed to solve the problem of wireless signal collision when multiple positioning cards and card readers are located within the precise positioning system. Two-channel and time-sharing methods are used to ensure that the ranging wireless signals are connected with the network and communication Wireless signals work on different channels, and ranging wireless signals of different positioning cards operate in different ranging slots, and do not interfere with each other, which greatly improves the capacity of concurrent reading of the card reader. Solve the problem of ranging wireless signal collision, improve the success rate of ranging and positioning accuracy.