Positive signal comparator and method
First Claim
1. A positive signal comparator system comprising:
- a controller located on a train;
a first transmitter connected to the controller for transmitting an interrogation signal to a wayside signal device under the control of the controller;
a wayside signal device including a first receiver for receiving the interrogation signal and a second transmitter for transmitting a wayside signal in response to the interrogation signal;
a second receiver connected to the controller for receiving the wayside signal;
a first input device connected to the controller, the first input device accepting a first signal from an operator of the train and providing the first signal to the controller;
wherein the controller is configured to compare the first signal to the wayside signal and take corrective action if the first signal does not match the wayside signal.
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Accused Products
Abstract
A positive signal comparator system comprises a transceiver located on a train for transmitting an interrogation signal to a wayside signal device and receiving a response signal from the wayside signal device, an input device through which an operator enters a signal in response to the signal received from the wayside signal device, and a controller including a signal comparator for determining if the signal input by the operator matches the signal received from the wayside signal device and taking corrective action if the operator fails to enter the proper signal. In some embodiments, the corrective action comprises activating a warning device and/or activating the train'"'"'s brakes. In some embodiments, the invention further comprises a display for displaying the signal received from the wayside signal generator to the operator.
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Citations
52 Claims
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1. A positive signal comparator system comprising:
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a controller located on a train;
a first transmitter connected to the controller for transmitting an interrogation signal to a wayside signal device under the control of the controller;
a wayside signal device including a first receiver for receiving the interrogation signal and a second transmitter for transmitting a wayside signal in response to the interrogation signal;
a second receiver connected to the controller for receiving the wayside signal;
a first input device connected to the controller, the first input device accepting a first signal from an operator of the train and providing the first signal to the controller;
wherein the controller is configured to compare the first signal to the wayside signal and take corrective action if the first signal does not match the wayside signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for operating a train comprising the steps of:
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determining when a train is near a wayside signal device;
transmitting an interrogation signal from the train to the wayside signal device when the train is near the wayside signal device;
receiving a wayside signal from the wayside signal device in response to the interrogation signal;
accepting a first signal from an operator of the train;
comparing the first signal to the wayside signal;
taking corrective action if the first signal does not match the wayside signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A positive signal comparator system comprising:
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a controller located on a train;
a receiver connected to the controller for receiving a wayside signal from a wayside signal device; and
an input device connected to the controller, the input device accepting a first signal from an operator of the train and providing the first signal to the controller;
wherein the controller is configured to compare the first signal to the wayside signal and take corrective action if the first signal does not match the wayside signal. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A method for ensuring that a train is operated in accordance with a wayside signal comprising the steps of:
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receiving a wayside signal from the wayside signal device;
accepting a first signal from an operator of the train;
comparing the first signal to the wayside signal;
taking corrective action if the first signal does not match the wayside signal. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52)
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Specification