Design prototype of audio guidance system for blind by using raspberry pi and fuzzy logic controller

Abstract

With almost 3.75 million people with visually impaired in Indonesia, according to statistical data shown that most of them not live in prosperity. To increase their productivity they need an assistive device that’s allows them to navigate freely. This paper presents a novel Audio guidance system for blind in the shape of simple bag with earphone for giving them an audio guidance efficiently and safety. Different with other audio guidance, we propose a simple system consist of Raspberry Pi Camera and Ultrasonic Sensor as input, Raspberry Pi, Earphone and Power bank. This system is initiated by providing a voice command of the direction where the blind person must walk or go through, so they can avoid from obstacles. We also apply Fuzzy Logic Controller (FLC) to detect the obstacles along they walk by using 3 ultrasonic sensors. The experimental result shows that by using FLC and interfacing by Raspberry Pi the proposed system can effectively to detect the obstacles and give direction with 2.32% distance error.

Educational Software System For Teaching STEM To Visually Impaired People

“…The stick assists the alertness and movement of the blind by detecting objects. D. VijendraBabuetal [13] developed a small, comfortable, and user-friendly device to detect obstacles ahead of a blind person. The paper discussed developing a jacket with a belt to make blind communication easier and safe.…”

“…The paper discussed developing a jacket with a belt to make blind communication easier and safe. The Jacket comes with an ultrasonic sensor on its Waist for detecting obstacle while moving and the vibrator connected to the sensor picks up the signal and indicate to the blind/ visually challenged person moving through the vibration signal [13,5,6] Ni'matulMa'muriyah et al discussed designing a prototype of an audio guidance system for the blind by using raspberry pi and fuzzy logic controller. V. Siddeswara Prasad et al [7,8]discussed the implementation of a device to assist visually impaired people in navigating through the buses.…”

“…The RX and TX LEDs on the board flash when data is being transmitted via the USB-to-serial chip and USB connection to the computer. The MAX7219 (as shown in Figure 4) is a serial input/output common-cathode display driver that interfaces microprocessors (µPs) to 7-segment numeric LED [13,14] displays of up to 8 digits, bar-graph displays, or 64 individual LEDs.…”

“…Figure 4.MAX7219 Dot Matrix DisplayThe MAX7219 (as shown in Figure4) is a serial input/output common-cathode display driver that interfaces microprocessors (µPs) to 7-segment numeric LED[13,14] displays of up to 8 digits, bar-graph displays, or 64 individual LEDs.Max7219 has an on-chip BCD code-Binary decoder, multiplex scan circuitry, segment, digit drivers, and an 8x8 static RAM that stores each digit. One external resistor is required for updating the segment current for all LEDs.…”

Audible Obstacle Warning System for Visually Impaired Person Based on Image Processing

“…Here, the user has difficulties to make their own decisions which direction to go. Another research on visual aids using embedded system and image processing also developed in [7], [8]. In [8] a guiding system developed uses ultrasonics and a camera to detect the obstacles and estimate the distance using Fuzzy Logic Inference System.…”