Transportation monitoring system for detecting the approach of a specific vehicle
DC- US 6,958,701 B1
- Filed: 06/04/2003
- Issued: 10/25/2005
- Est. Priority Date: 06/05/2002
- Status: Expired due to Term
First Claim
Patent Images
1. A system for detecting the approach of a vehicle, comprising:
- a vehicle transmitter which operatively transmits at least one code beyond said vehicle transmitter;
a code generator that generates a representative code selected from a plurality of codes which is representative of said vehicle transmitter and discernable from others of said plurality of codes, said code generator operatively coupled to said vehicle transmitter to couple said representative code to said vehicle transmitter for transmission of a signal therefrom;
a receiver remote from said vehicle transmitter having a signal receiver operatively monitoring transmitted signals from said vehicle transmitter at a signal strength at said receiver of at least a first threshold and having a code demodulator responsive to said signal receiver extracting said representative code from said signal;
a code detector comparing said representative code to at least one user-selected code and generating an indication of identity therewith; and
a lock-out for preventing said generation of indication of identity with said at least one user-selected code.
3 Assignments
Litigations
2 Petitions
Accused Products
Abstract
A system and apparatus for detecting the approach of a vehicle includes an encoded signal which identifies a vehicle or route, and which is used to distinguish from different vehicles and routes. A receiver detects transmission signals above a threshold level, and responsive to reception thereof checks for one or a plurality of codes that identify particular vehicles of interest. When a desired signal is received, an alarm or indicator is generated that alerts a person. When the indicator is terminated, a lock-out period prevents undesired re-activation of the alarm or indicator based upon the same code. Unique headers enable transmission and exchange of additional data, and logical text may be provided which enables more ready viewing of coded information. The present invention has industrial applicability to public and private transportation systems, whether for passengers or other cargo.
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Citations
18 Claims
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1. A system for detecting the approach of a vehicle, comprising:
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a vehicle transmitter which operatively transmits at least one code beyond said vehicle transmitter; a code generator that generates a representative code selected from a plurality of codes which is representative of said vehicle transmitter and discernable from others of said plurality of codes, said code generator operatively coupled to said vehicle transmitter to couple said representative code to said vehicle transmitter for transmission of a signal therefrom; a receiver remote from said vehicle transmitter having a signal receiver operatively monitoring transmitted signals from said vehicle transmitter at a signal strength at said receiver of at least a first threshold and having a code demodulator responsive to said signal receiver extracting said representative code from said signal; a code detector comparing said representative code to at least one user-selected code and generating an indication of identity therewith; and a lock-out for preventing said generation of indication of identity with said at least one user-selected code. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A means for alerting a person to a proximity of a transmitter at a first instant of time, comprising:
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a transmitter and a receiver spatially disparate to said transmitter, said transmitter and receiver tuned to a common transmission signal; a threshold of said common transmission signal detectable by said receiver; a code carried by said common transmission signal identifying said transmitter and detectable by said receiver; a means within said receiver for comparing said code to a plurality of stored values and responsive to a match therewith generating a signal indicative of a match; and a means to prevent at least one of said plurality of stored values from being included in said match signal generating. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A system for detecting the approach of a vehicle, comprising:
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a vehicle transmitter which operatively transmits at least one code beyond said vehicle transmitter; a code generator that generates a representative code selected from a plurality of codes which is representative of and uniquely identifies said vehicle transmitter and is discernable from others of said plurality of codes, said code generator operatively coupled to said vehicle transmitter to couple said representative code to said vehicle transmitter for transmission of a Manchester coded signal therefrom; a receiver remote from said vehicle transmitter having a signal receiver operatively monitoring transmitted signals from said vehicle transmitter at a signal strength at said receiver of at least a first threshold and having a code demodulator responsive to said signal receiver extracting said representative code from said signal; and a code detector comparing said representative code to a plurality of user-selected codes and generating an indication of identity with any of said plurality of user-selected codes; and a lock-out for preventing said indication of identity with at least one of said plurality of user-selected codes for a first time interval.
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Specification
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Litigation Data
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Current AssigneeVirtual Fleet Management, LLC (James (Jim) Bennett)
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Original AssigneeJohn D. Storkamp, Mark A. Storkamp, Ronald H. Menzhuber
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InventorsStorkamp, John D., Storkamp, Mark A., Menzhuber, Ronald H.
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Primary Examiner(s)Wu, Daniel
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Assistant Examiner(s)Walk, Samuel J.
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Application NumberUS10/454,903
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Time in Patent Office874 Days
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Field of Search340/994, 340/944, 340/426.13, 340/426.17, 340/426.35, 340/426.36, 340/992, 340/993, 701/207, 246/122.R
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US Class Current340/994
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CPC Class CodesG08B 5/006 Portable traffic signalling...G08G 1/123 indicating the position of ...H04B 17/23 Indication means, e.g. disp...H04B 17/318 Received signal strength
