Method and device for preventing fraud on a taxi equipped with a taximeter or on a truck equipped with a tachograph.

摘要

P Method and device capable of at least preventing the complete operation of a taximeter or tachograph (2) in the event of fraud introduced at the level of the output wires (4, 5) of the electronic sensor (1). BR/ It comprises an electronic device (17), placed in a tamper-proof envelope (6, 8, 22), which tests at least one of the internal characteristics of the active dipole present between these output wires (4, 5) and / or at least one of the characteristics of the signal present at its terminals, which compares this or these characteristics to one or more reference values, and which at least triggers an electronic anti-fraud action (20, 21) of the taximeter or tachograph in case non-compliance with this reference value or values. / P