부산대학교 도서관

Environmental information assists human beings to learn about the source that surround them, most visually impaired people make extensive use of the auditory environment not just to determine the presence of an obstacle, but also to successfully maneuver around it. This paper discusses various methods for improving blind people’s navigation by utilizing readily available technologies. The system includes the ability to detect obstacles for collision avoidance, as well as the ability to detect objects in up, down, and front directions using ultrasonic sensor. The other sensor detects water on the ground and is located near the bottom tip of the walking cane. The system’s whole operation is controlled by a microcontroller-based circuit. In the case of a crisis or loss, the technology also allows the blind person to send an SMS message with his or her GPS position to the caretaker or family. These sensors are critical in detecting objects in all directions, allowing blind persons to be self- sufficient.