System and method for fault tolerant roadway worker safety system
First Claim
1. A system for detecting an approaching train on an active railroad track or an adjacent track and providing an alert to roadway workers near a section of one or more of the active railroad track or the adjacent track over a secure wireless network, the system comprising:
- at least one train detector cone operable to detect the approaching train and transmit an alert signal in response, wherein said at least one train detector cone comprises a sensor unit comprising a plurality of simultaneously active sensors for detecting an oncoming train; and
at least one personnel warning cone operable to receive said alert signal and generate one or more of an audible alert warning or a visual alert warning in response to said alert signal,wherein said at least one train detector cone transmits a tilt alert signal to said at least one personnel warning cone upon detection of a change in orientation of said at least one train detector cone, the tilt alert signal communicating a call for corrective action,wherein one or more of said at least one train detector cone or said at least one personnel warning cone are configured to perform a first routing algorithm to discover a first communications path between each of said at least one train detector cone and each of said at least one personnel warning cone, andwherein said at least one train detector cone is further configured to identify a subset of said at least one personnel warning cone that are one or more of malfunctioning or not functioning and to discover, based on the identified subset, a second communications path between each of said at least one train detector cone and each of said at least one personnel warning cone.
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Accused Products
Abstract
A system for reliable detection of an approaching train and warning the roadway workers in proximity of the track is described. The system comprises at least one train detector cone (TDC) deployed along a side of an active railroad track and one or more personnel warning cones (PWC) placed near the work site, the cones configured in a wireless mesh network to provide redundant communication links. Detection of a train by the train detector cone is transmitted to the personnel warning cones which provide audible and visual warnings to nearby roadway workers. The system also includes a remote server for centralized tracking and monitoring of the train detector cones and personnel warning cones.
62 Citations
34 Claims
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1. A system for detecting an approaching train on an active railroad track or an adjacent track and providing an alert to roadway workers near a section of one or more of the active railroad track or the adjacent track over a secure wireless network, the system comprising:
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at least one train detector cone operable to detect the approaching train and transmit an alert signal in response, wherein said at least one train detector cone comprises a sensor unit comprising a plurality of simultaneously active sensors for detecting an oncoming train; and at least one personnel warning cone operable to receive said alert signal and generate one or more of an audible alert warning or a visual alert warning in response to said alert signal, wherein said at least one train detector cone transmits a tilt alert signal to said at least one personnel warning cone upon detection of a change in orientation of said at least one train detector cone, the tilt alert signal communicating a call for corrective action, wherein one or more of said at least one train detector cone or said at least one personnel warning cone are configured to perform a first routing algorithm to discover a first communications path between each of said at least one train detector cone and each of said at least one personnel warning cone, and wherein said at least one train detector cone is further configured to identify a subset of said at least one personnel warning cone that are one or more of malfunctioning or not functioning and to discover, based on the identified subset, a second communications path between each of said at least one train detector cone and each of said at least one personnel warning cone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of forming a self-healing wireless network of at least one train detector cone and a plurality of personnel warning cones for alerting one or more roadway workers of an approaching train, the method comprising:
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powering up said at least one train detector cone and said plurality of personnel warning cones; executing a routing algorithm to discover one or more cones in a vicinity of said at least one train detector cone and said plurality of personnel warning cones; transmitting network join requests to the one or more cones; accepting said network join requests and transmitting responsive network join acknowledgments; transmitting via said at least one train detector cone a tilt alert signal upon detection of a change in orientation of said at least one train detector cone, the tilt alert signal communicating a call for corrective action; and acknowledging receipt of said tilt alert signal via one or more of said plurality of personnel warning cones, wherein said at least one train detector cone is operable to detect an oncoming train and transmit an alert signal in response and at least one personnel warning cone is operable to receive said alert signal and generate one or more of an audible alert warning or a visual alert warning in response to said alert signal. - View Dependent Claims (30, 31, 32, 33, 34)
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Specification