A positioning method of tire pressure sensor applied in a positioning system of tire pressure sensor applied in a vehicle, the vehicle comprising a plurality of wheels, each of the plurality of wheels provided with a tire pressure sensor, the positioning system comprising a plurality of positioning devices and a receiving device, the positioning method comprising:
- receiving a plurality of Bluetooth signals from the plurality of tire pressure sensors, and obtaining a set of positioning data according to the plurality of Bluetooth signals by each of the plurality of positioning devices;
- and
- determining a matching relationship between the plurality of tire pressure sensors and the plurality of wheels according to preset positions of the plurality of positioning devices and the plurality of sets of positioning data, to locate the plurality of tire pressure sensors on the vehicle by the receiving device;
- wherein each of the plurality of positioning devices comprises a radio frequency (RF) modulator and a positioning controller, receiving a plurality of Bluetooth signals from the plurality of tire pressure sensors, and obtaining a set of positioning data according to the plurality of Bluetooth signals by each of the plurality of positioning devices comprises:
- converting frequencies of the plurality of Bluetooth signals from high frequencies to base frequencies by the RF modulator;
- parsing a plurality of signal field strength indications of the plurality of Bluetooth signals of the base frequencies by the positioning controller;
- determining a plurality of calculated distances between the plurality of positioning devices and the plurality of tire pressure sensors corresponding to a plurality of strengths of the plurality of signal field strength indications according to the plurality of strengths by the positioning controller;
- and
- determining a plurality of correspondences between the plurality of calculated distances and a plurality of identity documents carried by the plurality of Bluetooth signals, and obtaining the set of positioning data according to the plurality of correspondences by the positioning controller;
- wherein determining the matching relationship between the plurality of tire pressure sensors and the plurality of wheels according to the preset positions of the plurality of positioning devices and the plurality of sets of positioning data by the receiving device comprises:
- determining a set of matching relationship according to one of the plurality of correspondences between one of the preset positions of the plurality of positioning devices and one of the plurality of sets of positioning data, the one of plurality of correspondences is a relationship that one of the plurality of identity documents corresponding to each of the plurality of calculated distances is located on one of the plurality of wheels;
- counting a plurality of sets of matching relationship based on the plurality of positioning devices;
- and
- in a counting result, determining one of the plurality of sets of matching relationship with the highest probability to be the matching relationship between the plurality of tire pressure sensors and the plurality of wheels.