Method for avoiding fraud on a taximeter or tachograph
First Claim
1. A method for avoiding fraud on a taximeter or tachograph associated with a vehicle, the taximeter or the tachograph including a sensor which supplies electrical data to said taximeter or tachograph, such as a train of pulses which is representative of the speed of the vehicle, the method comprising the step wherein an anti-fraud action is triggered if voltage applied to the taximeter or tachograph and representative of said speed of the vehicle is modulated in amplitude.
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Abstract
A method and device for avoiding fraud on a Taximeter or Tachograph, by connecting an auxiliary generator between the censor and the Taximeter or Tachograph. The signal which is applied to the Taximeter or Tachograph is analyzed by sampling, in an anti-fraud action is triggered off if this analysis shows that this signal has undergone a regular amplitude modulation.
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Citations
11 Claims
- 1. A method for avoiding fraud on a taximeter or tachograph associated with a vehicle, the taximeter or the tachograph including a sensor which supplies electrical data to said taximeter or tachograph, such as a train of pulses which is representative of the speed of the vehicle, the method comprising the step wherein an anti-fraud action is triggered if voltage applied to the taximeter or tachograph and representative of said speed of the vehicle is modulated in amplitude.
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10. A method for triggering an anti-fraud action on a taximeter or tachograph of a vehicle, wherein a sensor provides a first signal representing speed of the vehicle and the taximeter or tachograph receives a second signal, the method comprising the steps of:
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a) determining whether the second signal is a modulated version of the first signal; and b) triggering an anti-fraud action if the second signal is determined to be modulated. - View Dependent Claims (11)
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Specification