The invention relates to a UWB function self-checking method and
system for an underground
coal mine positioning
card reader, and belongs to the technical field of ultra
wide band accurate positioning. Aiming at the problem that the
distance measurement function of an underground UWB one-dimensional positioning
card reader of a
coal mine fails due to environmental interference and hardware aging, a full-closed-loop solution composed of installation calibration, self-inspection triggering,
distance measurement verification and
exception handling is provided. Through the installation constraint that the horizontal distance between the left antenna and the right antenna is larger than or equal to 3 meters, an automatic calibration mode is started to execute a bilateral bidirectional
ranging DS-TWR process to generate a calibration value; when the equipment runs, the left antenna
simulation identification card and the right antenna
simulation identification card periodically initiate a network access request, bidirectional
distance measurement is completed based on a distributed
time sequence, and a measured value is compared with a calibration value; and when the error exceeds the limit or the distance measurement is overtime, the UWB module is automatically initialized and the fault is reported. According to the method, autonomous calibration and function
verification of equipment are achieved, the reliability and maintenance efficiency of an underground
positioning system are remarkably improved, and
safe operation of miners is ensured.