Method and system for automatically activating a warning device on a train
CAFCFirst Claim
Patent Images
1. A computerized method for activating a warning device on a train at a location comprising the steps of:
- maintaining a database of locations at which a warning device must be activated and corresponding regulations concerning activation of the warning device;
obtaining a position of a train and a speed of the train from a positioning system;
selecting a next upcoming location from among the locations in the database based on the speed and the position;
determining a point at which to activate the warning device in compliance with a regulation corresponding to the next upcoming location; and
activating the warning device at the point.
6 Assignments
1 Petition
Accused Products
Abstract
A method and system for automatically activating a train warning device that uses a positioning system such as a global positioning system (GPS) receiver or an inertial navigation system (INS) to determine the train'"'"'s position. The system further includes a database containing locations of grade crossings and other locations at which a train is required to give a warning signal and what regulations govern activation of the warning device at such locations.
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Citations
20 Claims
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1. A computerized method for activating a warning device on a train at a location comprising the steps of:
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maintaining a database of locations at which a warning device must be activated and corresponding regulations concerning activation of the warning device;
obtaining a position of a train and a speed of the train from a positioning system;
selecting a next upcoming location from among the locations in the database based on the speed and the position;
determining a point at which to activate the warning device in compliance with a regulation corresponding to the next upcoming location; and
activating the warning device at the point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for automatically activating a warning device on a train at a location, the system comprising:
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a control unit;
a storage device connected to the control unit, the storage device having stored therein a database of locations at which a warning device must be activated and corresponding regulations concerning activation of the warning device;
a positioning system in communication with the control unit, the positioning system being configured to supply a position of a train and a speed of the train to the control unit; and
a warning device connected to the control unit;
wherein the control unit is configured to perform the steps of selecting a next upcoming location from among the locations in the database;
determining a point at which to activate the warning device in compliance with a regulation corresponding to the next upcoming location; and
activating the warning device at the point. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification