Tire pressure monitoring system

The utility model relates to a tire pressure monitoring system by adopting a direct-type measuring method. The tire pressure monitoring system comprises measurement modules and a display module. Each measurement module comprises a pressure transducer, a temperature transducer, an acceleration transducer, a single chip, a transmission circuit and a power. The measurement modules are four in number and respectively arranged on tire valves of four tires of an automobile, and the transmission circuit comprises an emission chip and an antenna. The display module comprises a touch displayer, a single chip, a wireless receiving circuit and a power, and is arranged in an automobile cab. A wireless radio frequency method is adopted to carry out communication between the measurement modules and the display module. In the process of operation, the measurement modules are high in measurement accuracy and reliability, low in power dissipation, and capable of operating stably in long term. Besides, the touch displayer can be used as a man-machine interaction interface, thereby bringing convenience to a user to setup parameters and look up monitoring data, and pressure and temperature of tires can be monitored at the same time.