Signal processing unit for a trolley pole switch controller

Details Signal processing unit for a trolley pole switch controller Signal processing unit for a trolley pole switch controller

1996-05-01

2000-02-15

Riley, Shawn

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

191 37, 191 38, 246419, 246468, G05F 140

Patent

active

060257024

ABSTRACT:
A signal processing unit for a controller of a trolley pole switch is disclosed. The trolley pole switch switches the path of travel that an energy collector takes through the switch at a junction of catenaries at which a turn catenary and a straight catenary diverge from the straight catenary. The signal processing unit includes an input stage, a detection stage, turn and straight signal demodulation stages and an output stage. The input stage conditions modulated signals, each of which indicating a request to switch the path of travel through the trolley pole switch to the desired catenary diverging therefrom. The detection stage generates a validation signal if the conditioned modulated signal falls within a predetermined band. If the turn demodulation stage receives a conditioned modulated turn signal from the input stage and the validation signal from the detection stage simultaneously, it generates a low logic signal. If the straight demodulation stage receives a conditioned modulated straight signal from the input stage and the validation signal from the detection stage simultaneously, it generates a low logic signal. If a low logic signal is received from the turn demodulation stage, the output stage energizes a turn relay thereby supplying power to a turn solenoid for switching the path of travel to the turn catenary. If a low logic signal is received from the straight demodulation stage, the output stage energizes a straight relay thereby supplying power to a straight solenoid for switching the path of travel to the straight catenary.

REFERENCES:
patent: 2360064 (1944-10-01), Lewis
patent: 2710316 (1955-03-01), George
patent: 4090452 (1978-05-01), Segar
patent: 5297661 (1994-03-01), Tschurbanoff
patent: 5390772 (1995-02-01), Ta et al.

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