Novel electromagnetic type tire pressure detecting system

A novel electromagnetic type tire pressure detecting system comprises an electromagnetic coil, a return spring, a permanent magnet, an AD conversion module, an MCU and an alarm display module. The return spring is directly connected and fixed with a rim and is communicated with a car tire pressure; when a tire internal pressure changes, gas inside the tire pushes the return spring to move front and back to enable a sensing coil to sense different current signals, and the variable current signals are converted from analogue signals to current signals by virtue of the A/D conversion module and are delivered to a single-chip; the single-chip displays the tire pressure in an alarm displayer by virtue of analytic treatment.