Method and device for non-falsifiable detection of the rotational speed of a vehicle wheel

Abstract

Abstract The rotational speed of a part which is coupled to the drive and rotates when the vehicle moves is detected by a sensor (28) from whose signals a clock signal is formed and fed to a memory (27) whose content can be transmitted by a transmitter (13, 14) to an interrogation device. The rotational speed is determined with the aid of acceleration quantities which depend on the rotational position of the rotating part and cannot be manipulated, and the supply (10) of the transmitter is performed from outside the vehicle. The said acceleration quantities are preferably formed by the gravitational acceleration and/or by the centrifugal acceleration. Application to recording distance travelled or other events such as, for example, speed violations and the like. The device is secure against manipulation and falsification. <IMAGE>

Inventors

• 👤 Roland Küng
• 👤 René Dr. Hartmann

Bibliographic Details