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Traditionally, visually impaired individuals have relied on conventional walking canes to detect obstacles in their path. However, these canes have limitations in terms of efficiency. This paper focuses on the design and implementation of an electronic travel aid for visually impaired pedestrians, utilizing ultrasonic sensors, infrared technology, and a GSM module. The smart cane integrates ultrasonic sensors and IR technology to detect obstacles using ultrasonic waves and IR signals. When obstacles are detected, the sensor relays this information to a microcontroller (Atmega328P). The microcontroller processes the data and determines the proximity of the obstacle. If the obstacle is not closed, the system remains inactive. However, if the obstacle is close, the microcontroller activates a buzzer, generates continuous alarming sounds, and vibrates a motor, enabling the user to navigate the path more easily. Additionally, the system is equipped with a GSM module, allowing it to send SMS notifications to designated contacts in case of emergencies. By pressing an emergency button, a message is sent to a specified phone number. This integrated system provides both obstacle detection and emergency SMS notifications. The successful implementation of the system demonstrates its effectiveness and efficiency.
Anteneh Tesfaye (2024) studied this question.