Road vehicle information disc for remote identification - has disc with built=in resonator that is actuated by roadside unit to generate output to roadside receiver

摘要

A vignette is attached to the windscreen of a road vehicle and contains a built in resonance circuit. The circuit is excited by a signal generator located at a roadside position. The device responds to generate a signal that is received by a further roadside unit. The information can indicate that the vehicle is authorised. If not then a roadside sign is activated to indicate that the driver must stop at an indicated station. A camera can photograph the vehicle if necessary. USE - Remote interrogation of vehicle identification, motorway authorisation etc.. For anti-theft use in department store.