Three-dimensional laser scanning-based blind person navigation device

A blind navigation and laser three-dimensional technology, applied in the field of electronic information, can solve problems such as low resolution, inability to effectively prompt blind people to avoid high-speed objects such as motor vehicles, and difficulty in obtaining motion information of surrounding moving objects, so as to improve resolution High efficiency, avoiding the detection of navigation blind spots, and the effect of large field of view

Inactive Publication Date: 2012-05-16
ANHUI AGRICULTURAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

At present, navigation devices for the blind mainly use passive imaging methods to obtain road obstacle information, which has the defect of low resolution.
At the same time, this method can hardly obtain the motion information of surrounding moving objects, and cannot effectively prompt blind people to avoid high-speed objects such as motor vehicles

Method used

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  • Three-dimensional laser scanning-based blind person navigation device
  • Three-dimensional laser scanning-based blind person navigation device
  • Three-dimensional laser scanning-based blind person navigation device

Examples

Experimental program
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Embodiment Construction

[0014] exist figure 1 Among them, laser 1, laser modulator 2, vertical scanning mirror 3, motor A4, horizontal scanning mirror 5, motor B6, transmitting and receiving mirror 7, detector A8, detector B9, signal detection processing module 10, information processing and navigation module 11 , the voice prompt speaker 12, the beam splitter 13, the angle detector A14, and the angle detector B15 are all arranged on the base 16. The base 16 is configured in the shape of a cane, which is convenient for the blind to hold.

[0015] The laser modulator 2 is connected to the laser 1, and modulates the output laser light according to a specific frequency. The modulated laser signal is irradiated on the beam splitter 13, and part of the signal light is irradiated on the vertical scanning mirror 3 after being transmitted, and then irradiated on the horizontal scanning mirror 5 after being reflected by the vertical scanning mirror 3, and irradiated on the emission mirror 5 after being refle...

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Abstract

The invention discloses a three-dimensional laser scanning-based blind person navigation device. The device consists of a laser signal generation module, a scanning, transmitting and receiving module, a detection processing module and an information processing navigation module, wherein the laser signal generating module is used for transmitting a detection laser signal which is subjected to frequency modulation; the scanning, transmitting and receiving module is used for three-dimensional spatial scanning in the vertical and horizontal directions; the detection processing module is used for processing a laser echo signal and outputting time delay, phase and frequency shift data of laser echoes; and the information processing navigation module is used for processing detection data to acquire information such as positions, sizes, movement speeds and the like of a barrier in the front, judging danger levels of all barriers and informing blind persons of information of the barriers and moving vehicles which can bring danger to the walking of the blind persons through voice. Simultaneously, an internal global positioning system (GPS) module is used for providing specific positions for the blind persons to realize a voice prompt of an ideal destination path.

Description

Technical field [0001] The present invention relates to electronic information, in particular to a navigation device for the blind, especially a navigation device for the blind that uses laser three-dimensional scanning to acquire road obstacle information, processes it through an information processing system, and provides voice prompts. Background technique [0002] There are 16 million blind people in my country. They will face various complex and changeable traffic environments when they travel. The increasing number of motor vehicles and various obstacles on the road will threaten the travel of blind people. Utilizing electronic information technology, developing an effective navigation device for the blind will greatly increase the travel convenience of the blind group. At present, navigation devices for the blind mainly use passive imaging methods to obtain road obstacle information, which has the defect of low resolution. At the same time, this method can be difficu...

Claims

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Application Information

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IPC IPC(8): A61H3/06
Inventor 湛群黄晨冯广东杜兆芳刘明来
Owner ANHUI AGRICULTURAL UNIVERSITY
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