Sound signaling generation device for pedestrians

Details Sound signaling generation device for pedestrians Sound signaling generation device for pedestrians

1991-12-04

1993-08-31

Ng, Jin F.

Communications: electrical

Pedestrian guidance

340925, 340326, 340692, G08G 1095, G08G 107, G08B 2700, G08B 2508

Patent

active

052413071

ABSTRACT:
Sound signaling and optical signaling at a crosswalk are both activated by a single push button. An activation of optical signaling such as green and red figurines is immediate, whereas the transmission of a sound message authorizing or forbidding a crossing is activated only when the pedestrian pushes the button for a predetermined time. The generation device for sound signals is controlled by a microprocessor including logic and analog inputs and outputs, the messages being stored in digital form and transmitted according to the ADPCM method.

REFERENCES:
patent: 3134089 (1964-05-01), Bogoff et al.
patent: 3596238 (1991-07-01), Siklos
patent: 4253083 (1981-02-01), Imamura
patent: 4851836 (1989-07-01), Wilkinson et al.
patent: 5083310 (1992-01-01), Drory
patent: 5097113 (1992-03-01), Aoyama

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