Optically-controlled compass for blind person

Abstract

The invention discloses an optically-controlled compass for a blind person. The optically-controlled compass for the blind person comprises a compass shell, wherein a compass, an optically-controlled acoustic circuit, a power supply, a loudspeaker, a button switch and an optical sensor are arranged in the compass shell; the optical sensor is arranged at a north seeking end of the compass; the length of the north seeking end of the compass is greater than that of a south seeking end and greater than the distance from the optical sensor to the connecting part between the north seeking end and the south seeking end of the compass; the length of the south seeking end of the compass is smaller than the distance from the optical sensor to the connecting part between the north seeking end and the south seeking end of the compass; the optical sensor is connected with the optically-controlled acoustic circuit; the optically-controlled acoustic circuit is connected with the loudspeaker; the loudspeaker is connected with the button switch; and the button switch is connected with the power supply. The optically-controlled compass for the blind person has a simple structure, is convenient to use and can indicate the north direction and the south direction for the blind person, and positions in other directions can be determined according to the known directions.

Description

technical field [0001] The invention relates to a compass, in particular to a light-controlled compass for the blind. Background technique [0002] The compass is a simple instrument used to determine the direction; also known as the compass, the predecessor of the compass is Sinan, one of the four great inventions in ancient China; the main component is a magnetic needle mounted on a shaft that can rotate freely. The magnetic needle can be kept in the tangential direction of the magnetic meridian under the action of the geomagnetic field; the north pole of the magnetic needle points to the geographic North Pole, and this performance can be used to distinguish the direction; it is often used in navigation, geodesy, travel and military affairs; there is also a band with the same name name and movie title. [0003] The compass is affected by the magnetic field force in the earth's magnetic field, so one end points to the north and the other end points to the north. [0004] ...

AI Technical Summary

Problems solved by technology

[0006] Blind people cannot perceive the direction of east, west, north and south due to visual impairment, which will bring a lot of inconvenience to their daily life. The existing compass is not suitable for blind people.

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