Direct TPMS systems in product design in the face many difficulties

TPMS's life in general to reach 8 to 10 years, which alone a 500mAh battery (battery capacity over the General Assembly to increase the volume and weight transmitter module) transmitter is designed to maintain the work really is not a small problem. In addition to hardware circuit design power consumption is minimal outside, TPMS transmitter firmware design is very important in ensuring the reliability of the system requirements of the premise, the transmitter sensor measurements, RF data transmission times must be strictly controlled. Therefore, designers often have to system reliability and life requirements for optimization contradiction.

8020 TPMS sensor based on the design, taking into account the transmitter interrupt wake up the MCU to 3s work the way, most of the time the transmitter module in a power saving state, so the power-saving state designed to meet 0.6uA less power, while in the experiments under extreme battery life of the transmitter based on the number of launches statistics, theoretical calculations of the TPMS system life up to 10 years. TPMS transmitter module to be loaded inside the tire, the volume is not too large, too much will tire installation, removal caused a big problem; Second, the transmitter module's weight should be very light, otherwise it will affect tire balancing.

Direct TPMS systems in product design in the face many difficulties. As automotive safety products, should pay more attention to its system failure analysis. With TPMS technology continues to evolve, the new TPMS technology solutions are becoming more integrated, especially the sensor, MCU, transmitter circuit integrated, not only the transmitter module are smaller, lighter, and its performance, function others have greatly improved, such as the increase of LF, LVD, acceleration test and other functions, even through CAN bus with the TPMS system is connected to the vehicle electronic systems, in order to achieve information sharing.


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