Vehicle tracker mileage-time monitor and calibrator
First Claim
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1. Apparatus for determination of the length of a path traveled by a vehicle at a sequence of selected times, the apparatus comprising:
- a location determination (LD) unit, transported by a vehicle, that receives and processes LD signals to determine location coordinates of a present location L and speed v of the LD unit at one or more selected observation times and to determine a location at which a vehicle arrest event occurs, at which the LD unit speed v is no greater than a selected positive speed threshold for a continuous time interval of length Δ
t that is greater than a selected positive time interval length; and
a distance measuring mechanism that measures a cumulative distance traveled by the vehicle from a selected earlier time to the present time.
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Abstract
A system for monitoring location and speed of a vehicle, using a location determination system such as GPS, GLONASS or LORAN and an optional odometer or speedometer, for determining and recording the locations and times at which vehicle speed is less than a threshold speed for at least a threshold time (called a "vehicle arrest event"). Vehicle arrest event locations, times and time intervals are stored and/or printed to provide trip and mileage records and for efficiency monitoring. A vehicle odometer and/or speedometer can also be calibrated and/or corrected using this approach.
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Citations
34 Claims
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1. Apparatus for determination of the length of a path traveled by a vehicle at a sequence of selected times, the apparatus comprising:
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a location determination (LD) unit, transported by a vehicle, that receives and processes LD signals to determine location coordinates of a present location L and speed v of the LD unit at one or more selected observation times and to determine a location at which a vehicle arrest event occurs, at which the LD unit speed v is no greater than a selected positive speed threshold for a continuous time interval of length Δ
t that is greater than a selected positive time interval length; anda distance measuring mechanism that measures a cumulative distance traveled by the vehicle from a selected earlier time to the present time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for determination of the length of a path traveled by a vehicle at a sequence of selected times, the method comprising the steps of:
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receiving and processing location determination (LD) signals at an LD unit, transported by a vehicle, and determining location coordinates of a present location L and speed v of the LD unit at one or more selected observation times, and determining a location at which an vehicle arrest event occurs, at which the LD unit speed v is no greater than a selected positive speed threshold for a continuous time interval of length Δ
t that is greater than a selected positive time interval length; andestimating and recording the distance traveled by the vehicle from a selected earlier time to the present time. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification