Wireless embedded wearable haptic assistance navigation device based on networked technology for the visually impaired

This paper presents HAND (Haptic Assistance Navigation Device), a wearable device designed to help people with visual impairments navigate their surroundings more safely and independently. Worn on the back of the hand, HAND uses a combination of an ultrasonic sensor and an infrared Time-of-Flight sensor to detect obstacles. When an obstacle is detected, HAND provides clear and precise tactile feedback through small vibrating motors, giving the user immediate information about their environment. The paper details the device's design, including its power system, how the sensors work together, and the vibration feedback system. The performance of the device is ensured through extensive testing procedures. Our tests showed that both sensors are highly accurate, detecting distances with very little error. We also confirmed that the vibration motors respond quickly and provide easily noticeable feedback. Demonstrations with users indicate that HAND successfully identifies obstacles and helps users understand their environment through touch. Looking ahead, HAND has the potential for further improvements, such as integrating a sensor to track spatial orientation and refining the vibration system. As a component of a larger electronic travel aid, HAND shows great promise in significantly assisting individuals with visual impairments.