Two-axis accelerometer used for train speed measurement and system using the same
First Claim
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1. A system for monitoring a dynamic value of a vehicle, comprising:
- a two-axis accelerometer having a first axis and a second axis and at least one output for each of said first axis and said second axis; and
a processor coupled to both of said outputs for said first and second axis, wherein said processor uses data from each of said outputs to determine at least one of the speed, acceleration, grade, slippage or sliding of said vehicle.
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Abstract
The present invention is a two-axis accelerometer, and a system in which the accelerometer is incorporated, to measure the acceleration/deceleration of train, while independently dynamically measuring the grade on which the train is traveling. The two-axis accelerometer is mounted in a longitudinal plane at a mounting angle δ, and through measuring the train'"'"'s acceleration and gravity components along an axis ax and ay, the accelerometer provides a measurement of both the acceleration/deceleration of a train, while also providing an independent dynamic measurement of the grade on which the train is traveling.
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22 Claims
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1. A system for monitoring a dynamic value of a vehicle, comprising:
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a two-axis accelerometer having a first axis and a second axis and at least one output for each of said first axis and said second axis; and
a processor coupled to both of said outputs for said first and second axis, wherein said processor uses data from each of said outputs to determine at least one of the speed, acceleration, grade, slippage or sliding of said vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 19)
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13. A system for monitoring a dynamic value of a train, comprising:
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a two-axis accelerometer having a first axis and a second axis and at least one output for each of said first axis and said second axis;
a tachometer; and
a device which determines at least one of the speed and acceleration of said train coupled to said outputs of said two-axis accelerometer and said tachometer;
wherein said device uses data from each of said outputs and said tachometer to determine at least one of the speed, acceleration, grade, slippage or sliding of said train. - View Dependent Claims (14, 15, 16, 17, 18, 20, 21, 22)
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Specification