| 摘要 |
Conventional pulse generators for tachographs have a sensor head comprising at least one sensor that detects mechanical revolutions and generates a corresponding signal. To prevent manipulation of the pulse generator or to significantly complicate manipulation, the invention discloses a pulse generator with a sensor head (11) that comprises several interspaced sensors (11) which generate several sensor signals (S1, S2, S3) corresponding to the detected revolutions. An evaluation unit (20) compares said generated sensor signals (S1, S2, S3) with one another and/or with a saved signal pattern (SM). |
