Abstract: A scheme of the data acquisition of tire vertical load and the design of signal processing system is presented in this paper based on embedded platform. Specifically, MEMS sensors are embedded inside the tires to obtain their basic real-time data of radial acceleration, pressure and temperature, from which characteristic information is extracted to represent tire vertical load. Then bench test and real vehicle test are conducted respectively to verify the measurement method of vertical load of intelligent tire and characteristics extraction algorithm. The results show that the vertical load measurement method of intelligent tire is feasible,with its accuracy meeting the requirements of engineering application

Key words: intelligent tire, load measurement, embedded system, median filtering, polynomial fitting