A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 9/08 (2006.01) A61H 3/00 (2006.01) A61H 3/06 (2006.01) G01C 3/00 (2006.01) G01S 17/93 (2006.01) G01S 17/46 (2006.01) G01S 17/88 (2006.01) G01S 17/89 (2006.01)
Patent
CA 2117144
The present invention provides a mobility aid, for example a mobility aid handled in the manner of a flashlight, which allows a totally blind person to hand-scan, such as back and forth or up and down, the surrounding scene in order to hear the unbroken tonal phrases of varying frequencies which continuously indicate to the user the distance to, and, from the position of the hand, the position of objects and surfaces which make up the user's surroundings. A narrow laser beam is used, resulting in much higher angular resolution and distance detail, due to the much shorter wavelength, than that obtainable from practical ultrasonic devices, including those of the said prior art.
La présente invention fait état d'un article d'aide au déplacement, par exemple un article manipulé comme une lampe de poche, qui permet à une personne atteinte de cécité totale de balayer manuellement, de gauche à droite ou de bas en haut, son environnement immédiat afin d'entendre les phases tonales continues de fréquences variables qui indiquent continuellement à l'utilisateur la distance entre la position de sa main et les surfaces et les objets environnants. Un faisceau laser étroit sert au balayage, ce qui se traduit par une résolution angulaire et des détails supérieurs relatifs à la distance, en raison de la longueur d'onde beaucoup plus courte que celles obtenues au moyen de dispositifs ultrasoniques opérationnels, y compris ceux obtenus grâce à la technique existant déjà.
Kelk George F.
Ridout & Maybee Llp
LandOfFree
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