Practical apparatus reporting tyre status

摘要

Practical apparatus that reports tyre status simplistically comprises a magnet (1) inside a wheel that will (proportional to proximity at the bottom) induce differing magnetic polarisation patterns into the steel bracing (7) in a tyre (5). When tyre profile is wrong due to under inflation the magnet will be closer and polarisation will differ. As wheel rotates the moving magnet filed will make a non rotating sensor generate signals that are processed by suitable electronics to deduce the tyre status and if differing from a pre-determined reports unsafe tyre conditions. Polarisation is then erased by another magnet housed with the sensor and the system is automatically reset to monitor the tyre status each revolution. Effectively the apparatus acts as an endless loop recorder to record play and erase status of and on revolving tyre. This invention enables the apparatus to be simple and cheap to make and maintain while being efficient in operation.