Optical traffic preemption detector

Details Optical traffic preemption detector Optical traffic preemption detector

G - Physics

08

G

G08G 1/09 (2006.01) G08G 1/087 (2006.01)

Patent

CA 2070251

An optical traffic preemption detector as shown in Figure 2 for detecting pulses of light emitted by an approaching emergency vehicle and providing an output signal which is processed by a phase selector. The phase selector can request a traffic signal controller to preempt a normal traffic signal sequence to give priority to the emergency vehicle. A detector assembly is mounted in proximity to an intersection and can have multiple detector channels. A detector channel can have multiple photocells. The detector includes a housing having a base, at least one detector turret, a cap, and a detector circuit which further comprises a circuit board, a photocell with a lens placed over the photocell, and circuitry to produce an output signal.

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