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Blindness guide magnetic electronic compass

An electronic compass and blind guidance technology, applied in directions such as compass, surveying and navigation, measuring device, etc., can solve the problem of not having the function of direction indication.

Inactive Publication Date: 2008-11-12
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above device only sends out an alarm when the difference between the walking direction and the designated direction exceeds the limited range, and does not have the function of providing exact direction indication

Method used

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  • Blindness guide magnetic electronic compass

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Embodiment Construction

[0015] Such as figure 1 As shown, the blind-guiding magnetic electronic compass involved in the present invention is mainly composed of the following parts: a geomagnetic measurement sensor, a microprocessor system including an analog-to-digital converter, a walking direction voice prompt device, a power supply, a power switch, and buttons. The blind-guiding magnetic electronic compass is powered by batteries, and the installed 3 batteries supply power to each part of the whole device. The on and off of the power supply is controlled by a switch, press the switch to turn on the power supply when in use. The geomagnetic measurement sensor is responsible for the measurement of the horizontal component of the geomagnetic field. The microprocessor (C8051F005) used has a 12-bit analog-to-digital converter. The analog-to-digital converter converts the forward and right components of the geomagnetic field horizontal component into digital The microprocessor collects the correspondin...

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Abstract

A blind-guiding magnetic electronic compass relates to direction measurement and blind-guiding techniques. The compass measures geomagnetic field horizontal component by using a geomagnetic sensor, transmits to a microprocessor after digital / analog conversion, obtains a geomagnetic azimuth through calculation in the microcomputer, adds the geomagnetic azimuth with the magnetic declination data stored in the memory to obtain the direction data relative to the north, divides the measured 0-360 DEG direction angle information according to 8 extents and converts into forms such as 'north-by-east X DEG', 'east-by-north X DEG', 'positive east', and the like, which are convenient for understand, and outputs in voice prompt. The direction measurement and voice prompt device is capable of implementing accurate determinant function of direction, and also provided with magnetic field abnormality prompt function, can be convenient for user to determine accurately the reliability of the provided information, which is suitable not only for the blind, but also for the ordinary people for outdoor activity.

Description

technical field [0001] The invention relates to direction measurement and blind-guiding technology, in particular to a device for realizing direction measurement and voice prompt by using the earth's magnetic field. Background technique [0002] Blind people are unable to distinguish directions (east, west, north, south) due to their visual impairment, which brings great inconvenience to travel and life. The Chinese invention patent "A Direction Guide Method and Device" with the application number 2006100060154.5 proposes a blind guide device consisting of an electronic compass, a comparator, a designated direction memory and an alarm device. The direction guide device provided by the invention sets the direction indicated by the current electronic compass or the direction setting signal transmitted remotely as the designated walking direction. When the difference between the walking direction and the specified direction exceeds the limit range, a continuous alarm of "drip"...

Claims

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Application Information

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IPC IPC(8): G01C17/30
Inventor 李希胜舒雄鹰王绍纯
Owner UNIV OF SCI & TECH BEIJING
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