VEHICLE SPEED MONITOR
First Claim
1. A vehicle speed monitor for monitoring speed of a moving vehicle, the vehicle speed monitor comprising an integrated circuit (IC) card, the IC card comprising:
- an accelerometer being configured to measure instantaneous accelerations of the vehicle along three axes;
a nonvolatile memory;
a contact or contactless interface; and
a processor being programmed to record the instantaneous accelerations measured by the accelerometer over time in the nonvolatile memory and to transmit, via the contact or contactless interface, at least one of (1) the recorded instantaneous accelerations and (2) scalar instantaneous speeds over time determined from the recorded instantaneous accelerations.
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Accused Products
Abstract
A vehicle speed monitor for monitoring the speed of a moving vehicle is provided to the vehicle at an entrance to a road. The vehicle speed monitor records instantaneous accelerations of the vehicle along three axes over time. The vehicle speed monitor may be implemented as a contact or contactless integrated circuit (IC) card. The vehicle speed monitor is returned at an exit from the road, and scalar instantaneous speeds of the vehicle are determined from the recorded instantaneous accelerations in the vehicle speed monitor. The scalar instantaneous speeds are compared to one or more speed limits between the entrance and the exit to determine any speed limit violation. The vehicle speed monitor may also function as an electronic toll card where a toll is determined from the entrance and the exit. At the exit, the driver of the vehicle is charged with a fine and a toll, if any.
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Citations
19 Claims
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1. A vehicle speed monitor for monitoring speed of a moving vehicle, the vehicle speed monitor comprising an integrated circuit (IC) card, the IC card comprising:
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an accelerometer being configured to measure instantaneous accelerations of the vehicle along three axes; a nonvolatile memory; a contact or contactless interface; and a processor being programmed to record the instantaneous accelerations measured by the accelerometer over time in the nonvolatile memory and to transmit, via the contact or contactless interface, at least one of (1) the recorded instantaneous accelerations and (2) scalar instantaneous speeds over time determined from the recorded instantaneous accelerations. - View Dependent Claims (2, 3, 4)
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5. A system for monitoring speed of a moving vehicle, comprising:
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a vehicle speed monitor comprising an integrated circuit (IC) card, the IC card comprising; an accelerometer being configured to measure instantaneous accelerations of the vehicle along three axes; a nonvolatile memory; a contact or contactless interface; and a processor being programmed to record the instantaneous accelerations measured by the accelerometer over time in the nonvolatile memory; and a computer system, comprising; a contact or contactless reader; and an other processor being programmed to; download from the vehicle speed monitor, via the contact or contactless reader, at least one of (1) the recorded instantaneous accelerations and (2) scalar instantaneous speeds over time determined from the recorded instantaneous accelerations; and determine if a speed limit has been exceeded from the scalar instantaneous speeds. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for monitoring speed of a moving vehicle, comprising:
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providing a vehicle speed monitor comprising an integrated circuit (IC) card to the vehicle at an entrance of a road, wherein the vehicle speed monitor measures and records instantaneous accelerations of the vehicle along three axes over time; receiving the vehicle speed monitor at an exit from the road; downloading from vehicle speed monitor, by contact or contactless communication, at least one of (1) the recorded instantaneous accelerations and (2) scalar instantaneous speeds over time determined from the recorded instantaneous accelerations; and determining if a speed limit has been exceeded from the scalar instantaneous speeds. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification