Traffic control malfunction management unit with co-channel...

Details Traffic control malfunction management unit with co-channel... Traffic control malfunction management unit with co-channel...

2006-09-19

2006-09-19

La, Anh V. (Department: 2636)

Communications: electrical

Traffic control indicator

Traffic control or local controller failure indicator

C340S907000, C340S642000

Reexamination Certificate

active

07109886

ABSTRACT:
A method and apparatus for monitoring for Red Fail faults in a traffic signal control system. Traffic control signals generated by a traffic control unit are grouped into channels. A parent-child relationship is established between some channels. When testing for a Red Fail fault, the control signals in both the parent channel and the child channel are examined. A Red Fail fault will occur only if all the control signals examined in both the parent and the child channel are inactive. The control signals examined in the child channel can be limited to the Green and Walk signals; or may include the Yellow signals.

REFERENCES:
patent: 4383240 (1983-05-01), Staats, Jr.
patent: 4586041 (1986-04-01), Carlson
patent: 4734862 (1988-03-01), Marcus et al.
patent: 5734116 (1998-03-01), Schaeffer
Eberle Design Inc., Operations Manual-MMU-16E-BS-Series RMS signal Monitor, Jan. 2001, Eberle Design INC., Sections 1-8- DOC #2.
“To Whom It May Concern”- DOC#1, 1 page.

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