Portable intelligent blind guide device and method

Abstract

The invention provides a portable intelligent blind guide device and method. The portable intelligent blind guide device is characterized in that a light and portable Raspberry Pi is used as a controlcenter of the device, a vertical row of ultrasonic wave sensors which are arranged at fixed intervals are additionally arranged in a traditional blind guide walking stick, the ultrasonic wave sensorsare controlled by a steering engine to rotate to measure distance, and the information of a space obstacle within the range of 0-180 degrees in front of a blind person is detected; Raspberry Pi simulated PWM waves are output through a GPIO to control rotation of a steering engine module, the PWM pulse width is 0.278 ms, and the steering engine rotates 10 degrees each time; if the width, detectedby every two adjacent ultrasonic wave sensors, of the obstacle is 5 centimeters higher than a warning value, it can be judged that there is the obstacle, the shape and position of the obstacle are calculated according to the ultrasonic wave sensing distance and the rotation angle of the steering engine, and voice broadcast is conducted through a mobile APP. The device further has a one-key warningfunction. The device is simple in component, both the portability and the intelligence are considered, and the device can be expanded to be applied to a portable intelligent blind guide walking stick.

Description

technical field [0001] The invention relates to the field of portable intelligent blind-guiding equipment, in particular to a portable intelligent blind-guiding device and method. Background technique [0002] Statistics released by the World Health Organization in October 2018 show that globally, an estimated 1.3 billion people suffer from various forms and degrees of visual impairment, and most of the visually impaired are over 50 years old. In recent years, with the development of computer software and hardware technology, all kinds of portable electronic devices have entered our lives. While bringing a lot of convenience and fun, it also makes us more capable of bringing benefits to the lives of blind people, a disadvantaged group. Some changes allow them to personally enjoy the gospel brought by technological progress. Existing assistive tools for the blind are mainly divided into three categories through continuous development. [0003] The first category is a blind-...

AI Technical Summary

Problems solved by technology

However, in the process of realizing intelligent obstacle detection, voice broadcast and one-key alarm in the cane-type blind-guiding equipment, it is necessary to continuously add embedded control subsystems, wireless ranging subsystems, and road condition recognition subsystems to the original blind-guiding canes. , navigation subsystem and other modules increase its size and weight, which affects the portability of this type of equipment

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