Blind person guide device

Details Blind person guide device Blind person guide device

1987-02-24

1987-12-08

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250215, 340555, 342 24, G01S 1706

Patent

active

047120037

ABSTRACT:
There is disclosed a blind person guide device comprising a walking stick, a source mounted on a front face of the walking stick for emitting a beam of infrared radiation in a forward direction, a photoelectric element mounted on the front face of the walking stick for receiving infrared radiation reflected from an object irradiated by the beam, an electric circuit for producing information as to a distance to the object based on the illuminance or energy of received radiation on the photoelectric element, an oscillator for generating electric vibrations having a frequency and an amplitude which are dependent on the distance information produced by the electric circuit, and a vibrator vibratable in response to the electric vibrations and having a vibrating surface against which a human skin can be pressed.

REFERENCES:
patent: 3546467 (1970-12-01), Benjamin
patent: 3718896 (1973-02-01), Mowat
patent: 4280204 (1981-07-01), Elchinger
patent: 4356393 (1982-10-01), Fayfield
patent: 4459476 (1984-07-01), Weissmueller et al.
patent: 4591710 (1986-05-01), Komadina et al.

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