Computer for motion sensing device setup

Details Computer for motion sensing device setup Computer for motion sensing device setup

1975-06-09

1976-08-31

Blix, Trygve M.

Railway switches and signals

Electric automatic highway signals, mine doors, and gates

Normally open track circuit

246125, B61L 2928

Patent

active

039776344

ABSTRACT:
A system for calibrating a receiver in a railroad grade crossing protection system having a transmitter and receiver connected to the rails and a defined approach track section, utilizes the receiver detected motion voltage to determine low ballast resistance. A signal representative of the ballast condition is then utilized in conjunction with the signal representative of train motion to calibrate the receiver for the particular ballast condition.

REFERENCES:
patent: 3603786 (1971-09-01), Peel
patent: 3614418 (1971-10-01), Pell
patent: 3777139 (1973-12-01), Peel

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