Fault detection for traffic light systems using electronic lighting elements

Fault detection for traffic light systems using electronic lighting elements

An indicator controller (18), an optical assembly (10) having the indicator controller (10), a traffic light system that comprises at least one of the optical assembly (10) and a method for fault indication by the indicator controller (10) is disclosed. A control signal from a control signal generat...

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Hauptverfasser: RAMASWAMY MUTHURAMAN, CHENG TAI LEONG, CHAN HUA TEK
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PHYSICS
SIGNALLING
TRAFFIC CONTROL SYSTEMS
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creator RAMASWAMY MUTHURAMAN
CHENG TAI LEONG
CHAN HUA TEK
description An indicator controller (18), an optical assembly (10) having the indicator controller (10), a traffic light system that comprises at least one of the optical assembly (10) and a method for fault indication by the indicator controller (10) is disclosed. A control signal from a control signal generator (20) of the indicator controller (18) is disabled to block off current supply to a diode chain of three light emitting diodes (LEDs) of an array (12) of LEDs. Input to the control signal generator (20) has a frequency setting section that sets the control signal at a predetermined frequency. Consequently, the three LEDs are made to blink according to the predetermined frequency. The control signal is generated when the amplitude of current supply to the array (12) exceeds a threshold setting.
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subjects ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PHYSICS
SIGNALLING
TRAFFIC CONTROL SYSTEMS
title Fault detection for traffic light systems using electronic lighting elements
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