Safe merging system using short pulse signal reflectomerty

Details Safe merging system using short pulse signal reflectomerty Safe merging system using short pulse signal reflectomerty

1981-02-20

1983-07-19

Swann, III, Glen R.

Communications: electrical

Selective

Having indication or alarm

340 47, G08G 112

Patent

active

043946402

ABSTRACT:
Electromagnetic pulses of substantially nanosecond duration are transmitted from a merge location along transmission lines paralleling merging guideways to be incident to reflecting or repeating apparatus on vehicles approaching the merge. Coupling of the reflecting or repeating apparatus to the transmission line is such that sufficient electromagnetic energy is returned from the n.sup.th vehicle to the merge location for detection and processing thereafter. The returned signals are used to calculate, for each vehicle, the distance from the merge location and the approach speed.

REFERENCES:
patent: 2685068 (1954-07-01), Goubau
patent: 3582626 (1971-06-01), Stansbury
patent: 3662316 (1972-05-01), Robbins
patent: 3832568 (1974-08-01), Wang
patent: 3971990 (1976-07-01), Ross
patent: 3979749 (1976-09-01), Ross et al.
patent: 4188595 (1980-02-01), Cronson et al.
patent: 4254418 (1981-03-01), Cronson et al.

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