Class I TPMS alarm method and system based on PEPS antenna and TPMS sensor

Abstract

The invention provides an I-type TPMS alarm method based on the I-type TPMS alarm system based on the PEPS antenna and the TPMS sensor, and the method specifically comprises the following steps: S1, when a vehicle is detected to be in an ON gear, the TPMS control module periodically controls the PEPS antenna to send a trigger signal, and the trigger signal is a high-power carrier signal; s2, each TPMS sensor transmits a high-frequency tire pressure radio-frequency signal to the TPMS control module in a time-sharing manner based on the trigger signal; and S3, the TPMS control module analyzes the received tire pressure radio frequency signal, judges whether the corresponding tire has underpressure or not, and sends out related alarm information. According to the TPMS alarm strategy provided by the invention, on the premise that the hardware cost of the vehicle is not increased, the alarm function of the I-type sensor can be realized only by changing software, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of TPMS alarm, and provides a type I TPMS alarm method and system based on a PEPS antenna and a TPMS sensor. Background technique [0002] The national standard GB 26149 requires the tire pressure alarm strategy for ordinary direct type II TPMS: when a single tire is underinflated, it needs to be alarmed within 10 minutes, and when multiple tires are underinflated, it needs to be alarmed within 15 minutes, system failure (tire pressure loss) etc.) The fault alarm signal device that needs to light up the instrument within 10min, for the common direct type I TPMS alarm strategy requirements: when a single or multiple tires are under-inflated, an alarm needs to be issued within 10S, system failure (tire pressure loss, etc.) A fault alarm signal device that needs to light up the instrument within 10 minutes. [0003] To achieve the alarm time requirement of Class I TPMS 10S, the traditional method is to attach ...

AI Technical Summary

Problems solved by technology

[0003] To achieve the alarm time requirement of Class I TPMS 10S, the traditional method is to attach a low-frequency antenna (4 in total) to each TPMS sensor, and then drive the low-frequency antenna through the TPMS control module (BCM) to trigger the tire pressure sensor to transmit RF signals to the BCM , BCM then sends the relevant alarm signal to the alarm device, with 4 low-frequency antennas to increase the hardware cost of the vehicle, and the corresponding controller needs to add 4 additional output interfaces, which increases the overall cost of the system solution

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