Tire Pressure Monitoring System based on Resonant Frequency of Wheel Speed Spectrum

The tire pressure monitoring system(TPMS) is the module implemented in vehicles detecting whether the tire is under-inflated to avoid puncture and destabilization. This paper presents a scheme for indirect TPMS based on wheel speed sensors and onboard hardware. Firstly, a wheel speed signal processing method is raised, including denoising, rim error filtering, and resampling. Secondly, a resonance frequency identification method based on the wheel speed spectrum is proposed based on the characteristics of tire vibration. Finally, the whole process of the method was deployed on the actual vehicle, and the test results proved the effectiveness of the proposed method.