Patent ID: 7520002

Claim:
A method for identification of manipulation to an arrangement comprising a sensor which emits pulses and a recording unit (RM), the method comprising the steps of: transmitting, by the sensor, real-time pulses from a measurement to the recording unit, transmitting by, the recording unit, cyclically, a first request instruction to the sensor, in response to which transmitting, by the sensor, a first data signal which includes information about intermediate real-time pulses to the recording unit, providing a real-time signal interface which adds the real time pulses to form a number of real time pulses, providing a data signal evaluation module in the recording unit which determines the number of pulses based on the data signal to form a number of data signal pulses, transmitting by the data signal evaluation module a second request instruction to the real time signal interface in response to which the real time signal interface transmits the number of real time pulses to the data signal evaluation module, wherein the first request instruction and the second request instruction follow one another offset by a specific time interval, and wherein the data signal evaluation module compares the number of real time pulses and the number of data signal pulses with one another to provide a high level of security against deceitful manipulation of recordings.