Blind guiding device and blind guiding method based on dual-frequency ultrasonic waves

Abstract

The invention relates to a blind guiding device and a blind guiding method based on dual-frequency ultrasonic waves. The blind guiding device structurally comprises a control handle, a control press key, a main circuit board, a first ultrasonic wave emitting energy transducer, a second ultrasonic wave emitting energy transducer, a first ultrasonic wave receiving energy transducer and a second ultrasonic wave receiving energy transducer; the control handle is mainly provided with a storage battery; and a main control circuit is arranged inside the main circuit box, and can be used for resolving ultrasonic wave signals with the corresponding frequency received by the first ultrasonic wave receiving energy transducer and the second ultrasonic wave receiving energy transducer and controlling a warning device to send out the warning alarm according to the resolving result so as to tell the distance and the moving state of obstacles to a blind person. The blind guiding method provided by the invention can be used for helping the blind person to judge the moving state of the obstacles in advance on the basis of detecting the distance of the obstacles, and has the advantages that the precision is high; the operation is simple; and the electricity is saved, and the like.

Description

technical field [0001] The invention relates to a blind-guiding device and a blind-guiding method based on dual-frequency ultrasonic waves. Background technique [0002] According to the statistics of the national authoritative department, as of August 8, 2006, China is the country with the largest number of blind people in the world, with about 5 million people, accounting for 18% of the world's blind population. At the same time, there are 450,000 new blind people in my country every year. Experts pointed out that if the current development trend remains unchanged, the number of blind people in China is expected to increase by 4 times by 2020. Compared with able-bodied people, there are many inconveniences in the lives of blind people, the most prominent being walking. When the blind walk alone, they mainly rely on guide devices and guide dogs, but guide dogs are not easy to train and cost more. Many cities have set up sidewalks for the blind, but in many cases, the blin...

AI Technical Summary

Problems solved by technology

However, the problem with this device is that the blind guide equipment can only measure the distance between the user (blind person) and the obstacle, but cannot predict the movement state of the moving obstacle.

However, the problem with this device is that in order to achieve a rough detection of the state of the mobile obstacle, it is necessary to continuously turn on the ultrasonic transducer and always specify a certain detection direction, which seriously wastes the power of the battery and shortens the service life of the battery. reduce

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