Method and apparatus for monitoring conditions of a vehicle tire

Abstract

A method for monitoring various physical conditions of pneumatic tires and to a tire which includes a memory device mounted on the interior of the tire within the pressurizable cavity and a separate monitoring device mounted on the tire rim. The memory device contains a battery, an antenna and stored data pertaining to the tire. The monitoring device uses an active self-powered programmable electronic circuitry which obtains data from the memory device and in addition contains one or more sensors which obtains engineering conditions such as temperature, pressure, tire rotation and/or other operated conditions of the pneumatic tire along with the stored information from the memory device. The memory device can be actuated by externally transmitted radio frequency waves from a remote location or by signals from the monitoring device, and the monitoring device can transmit the information to the remote location by a separate, larger and more powerful battery which is mounted on the tire rim than the battery in the memory device.

Dependencies are inferred from the claim text.