Method and device in order to avoid frauds on a taxi equipped with a taximeter, or on a truck, equipped with a tachograph.

摘要

Method and device able to prevent the complete operation of the taximeter or chronotachograph (2) in the case 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 protective casing (6, 8, 22), which tests at least one of the internal characteristics of the active dipole present between the 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 reference values, and which at least one electronic circuit triggers acting anti - fraud (20, 21) of the taximeter or chronotachograph in the case of a non - conformity with this or these reference values.