Near-field low-frequency wireless positioning method used for automatically-guided vehicle

The invention relates to a near-field low-frequency wireless positioning method used for an automatically-guided vehicle. The method comprises the following steps of: first, initializing a controller of a vehicle-mounted positioning module, reading a calibration parameter, and waiting a positioning starting command from a motor control module; then, after receiving the positioning starting command of the motor control module, sending an initialization command by a guiding module so as to initialize the guiding module; next, transmitting a signal by a low-frequency transmitting base station inthe vehicle-mounted positioning module, returning a signal strength value RSSI (dn) to obtain the distance between each low-frequency transmitting base station and the guiding module after receiving the signal by the guiding module, selecting any three distance values, and calculating three-dimensional coordinate values of the guiding module; later on, averaging all three-dimensional coordinate values of the guiding module to obtain final three-dimensional coordinate values; and finally, sending the final three-dimensional coordinate values to the motor control module to guide a vehicle to move along with the guiding module. The method has the advantages of high adaptive ability and high response speed.