Application research of low-frequency wake-up technology in personnel positioning system

In view of problem of short service time and great maintenance workload of identification card battery used in current personnel positioning system, the paper proposed to apply low-frequency wake-up technology to reduce battery operating time, thereby extend battery life, namely set dormant state for identification card when the miners are outside of the mine, and use low-frequency signal receiver to wake up the identification card when the miners go down the mine. The test results show that the use of low-frequency wake-up technology can greatly improve battery life of identification card, when the signal transmission period is 1-3 s, the battery life is extended to more than 2.7 times of the original, and the improving effect is better as the transmission period becomes shorter.