TAMPER-PROOF ODOMETER SYSTEM
First Claim
1. A method comprising:
- determining, by a tamper-proof sensor, when a target wheel'"'"'s angular rotation (Δ
θ
t) reaches a threshold;
incrementing a measured count in a counter in the tamper-proof sensor in response to the rotation-determining step; and
determining a first measured distance based on the measured count of the counter;
determining, by an odometer, a second measured distance; and
producing an error value based on a difference between the first measured distance and the second measured distance.
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Accused Products
Abstract
Various embodiments relate to a system and related method of validating a distance based on a plurality of sensor measurements in a vehicle. A tamper-proof odometer system may comprise an odometer and a tamper-proof sensor that independently determine distances based on measurements of vehicle components. The tamper-proof sensor may maintain a non-modifiable count based on the angular rotation of a target wheel from which to calculate a vehicle'"'"'s distance traveled. An odometer may maintain a count based on the rotation of a wheel mounted to the transmission. An electronic control unit (ECU) or dashboard control unit (DCU) may compare the distance derived from the odometer with the distance derived from the tamper-proof sensor by comparing the error to a defined threshold. When the error value is above the defined threshold, this may indicate that one or more of the components of the odometer system have been manipulated.
21 Citations
20 Claims
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1. A method comprising:
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determining, by a tamper-proof sensor, when a target wheel'"'"'s angular rotation (Δ
θ
t) reaches a threshold;incrementing a measured count in a counter in the tamper-proof sensor in response to the rotation-determining step; and determining a first measured distance based on the measured count of the counter; determining, by an odometer, a second measured distance; and producing an error value based on a difference between the first measured distance and the second measured distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system comprising:
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a tamper-proof sensor comprising; a processor that determines when a first target wheel'"'"'s angular rotation (Δ
θ
t) reaches a threshold;a counter that increments a measured count in response to the processor determining that the first target wheel'"'"'s angular rotation reached the threshold, wherein the processor determines a first measured distance based on the measured count; an odometer that determines a second measured distance; and a dashboard control unit (DCU) that produces an error value based on a difference between the first measured distance and the second measured distance. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification