Tire pressure monitoring system and method for performing auto-location thereof

A tire pressure monitoring system comprising:

• a tire pressure monitoring module provided in a wheel or a tire, the tire pressure monitoring module measuring pressure of the tire and a wheel phase angle of the wheel,
• transmitting a burst signal comprising consecutive data frames including a tire pressure information and an identification code at a predetermined position of the phase angle, and
• setting a delay time between the consecutive data frames of the burst signal based on the predetermined position of the phase angle;
• a wheel monitoring sensor provided in a vehicle body, the wheel monitoring sensor measuring rotation of the wheel to provide phase angle information of the wheel;
• and
• a control unit, the control unit receiving the burst signal from the tire pressure monitoring module,
• receiving the phase angle information of the wheel at the time of transmitting the burst signal from the wheel monitoring sensor,
• calculating the predetermined position of the phase angle from the delay time, and
• comparing the calculated predetermined position of the phase angle and the phase angle information of the wheel with each other to identify a position of the wheel on which the tire pressure monitoring module is mounted,
• wherein the tire pressure monitoring module partitions the phase angle of the wheel into a plurality of phase angles to assign phase angle numbers to respective partitioned positions,
• stores a plurality of transmission patterns in which the phase angle numbers are randomly arranged,
• randomly selects a transmission pattern among the plurality of transmission patterns, and
• calculates and applies the delay time based on transmission pattern information representing a position indicated by the phase angle number at the position according to each of the phase angle numbers arranged in the plurality of transmission patterns,
• wherein each of the phase angle numbers is generated by using a random variable.