Study On The Passive TPMS (Tire Pressure Monitoring System)

TPMS (Tire Pressure Monitoring System)as a new type automobile active safety device has been developing rapidly in recent years wordwide. Since it could monitor tire pressure and temperature in real time and alert the driver in time,most taffic accidents caused by flat tire could be avoided to essure safe driving..In view of the TPMS non-battery supply pattern trend of development, studied and has analyzed the domestic and foreign TPMS passive development several realization plan, to the piezoelectricity electricity generation plan, the microseismic movement electricity generation plan, the magnetic field electromagnetic coupling plan carried on the brief analysis, simultaneously attempted designs one kind of new plan to conduct the concrete research. Installs an energy transformation installment on the automobile wheel hub, rotates the kinetic energy using the wheel to transform as the electrical energy, provides in the TPMS system vehicle the sensor job requirement. This installment mainly by the magnet, the coil and the axis is composed, the coil fixes on the axis, or decelerates in the pick-up in the process, the basis law of inertia, the magnet military and political leader regarding the axis rotation, achieved the cutting magnetic line of force has the electrical energy goal, through to the installment law of motion analysis, the transient equilibrium analysis, the energy statistics draws the conclusion, obtains the plan feasibility, provided one to realize the TPMS passive effective way。...