SPEED DATA TRANSMISSION DEVICE

摘要

The invention relates to a speed data transmission device for use in a motor vehicle, comprising a measuring head (3) for measuring a movement which measuring head is adapted to supply an application control device (5) and a safety control device (4) with a corresponding measurement signal. The measurement signal can be processed by the application control device (5) and the processed data can be forwarded to a comparator of a control device in real time. The measuring signal can be processed in the safety control device (4) and the processed data can be encrypted in an encryption unit and the encrypted data can be stored in a storage unit. The storage content of said storage unit can be forwarded to the control device at defined intervals. The control device has a decryption unit for decrypting the supplied storage content and for forwarding the decrypted storage content to the comparator of the control device. Said comparator can be used to compare the decrypted storage content with the data of the application control device (5) and to produce an alert signal in the event of any deviation. All elements of the measuring head (3) and the safety control device (4) comprising the encryption unit and the storage unit are arranged within a single integrated circuit unit (1).