Method and device for avoiding fraud in a taxi with a taximeter or in a lorry with a tachograph.

摘要

The anti-fraud method for a taxi-meter or a tachograph, the vehicle having an electronic sensor (1) with its outputs (4,5) connected to the meter (2), involves connecting, in parallel to or to, the two transducer outputs. An anti-fraud operation (18-19, 20-21) of the sensor is activated, and involves modifying the electronic information which is normally transmitted to the metering device, if at least one of the internal characteristics of the active dipole present between the sensor outputs and/or if at least one of the characteristics of the electric signal at the output of the sensor during normal travel of the vehicle, have been modified with respect to preset reference values.