针对现有矿用智能手机大多只具有语音通话、视频拍照、数据传输等功能，没有精确定位、位置坐标显示、消息联动等功能，设计了一种基于UWB技术的用于手机定位的标识卡。该标识卡内置于智能手机，通过低功耗蓝牙（BLE）与智能手机实现双向数据通信；标识卡采用TOF定位算法与UWB基站完成精确定位，获得位置坐标信息，通过低功耗蓝牙（BLE）发送至智能手机，在智能手机APP矿井GIS巷道图上显示当前具体位置坐标。详细介绍了标识卡的矿井巷道位置坐标模型、精确定位算法、消息联动可靠传输机制、低功耗休眠技术等关键技术。测试结果表明：该标识卡的定位精度≤±0.3 m，定位距离可达400 m，消息联动传输时延小于2 s，位置坐标显示准确，休眠电流小于25 μA，平均电流满足低功耗设计要求。

In order to solve the problem that most of the existing mine-used smart phones only have the functions of voice calls, video photos, data transmission and so on, and do not have the functions of precise positioning, position coordinate display, message linkage, an identification card based on UWB technology is designed. The identification card realizes two-way data communication with the smart phone through low-power bluetooth. The identification card completes the precise positioning with the UWB station using the TOF positioning algorithm, obtains the position coordinate information, sends it to the smart phone through the low-power bluetooth (BLE), and displays the current specific position coordinates through the mine GIS roadway map on the smart phone APP. This paper introduces the key technologies of the identification card in detail, including mine roadway position coordinate model, precise positioning algorithm, message linkage reliable transmission mechanism, low power consumption sleep technology. The test results show that the positioning accuracy of the identification card is less than ± 0.3 meters, the positioning distance can reach 400 meters, the message linkage transmission delay is less than 2 seconds, the position coordinate display is accurate, the sleep current of the positioning module is less than 25 uA, and the average current meets the low power consumption design requirements.