Design And Implementation Of Electric Wheelchair Transformer

Abstract

Wheelchairs significantly improve mobility, freedom, and quality of life in the lives of people with disabilities. However, because of their limited financial resources and they may already own a traditional wheelchair, many of them find it difficult to justify investing in a new electric wheelchair. To approach this customer segment, the idea is to develop a device that connects to an existing wheelchair, transforming it into a low-cost electric wheelchair. The design used a hub motor which serves as the primary driving force, providing the necessary propulsion for the wheelchair. The IC controller acts as the central control unit, managing the motor's operation and ensuring smooth and efficient performance. The Li-ion battery acts as the power source, supplying the required energy for the electric conversion, enabling the wheelchair to operate effectively for approximately one hour. To enhance the functionality and safety of the electric wheelchair, additional features have been incorporated. The backward control capability allows users to effortlessly navigate in reverse, offering greater maneuverability. An ultrasonic sensor has been added to detect impediments and sound an alert when they are within a specific distance. Additionally, to identify cases of falls or tilting, a tilt sensor has also been installed which triggers an email to a linked smartphone, alerting caretakers or emergency contacts of the occurrence. The handlebar is adjustable to accommodate various users. By combining these accessories and functionalities, the traditional wheelchair can be transformed into an electric wheelchair that not only offers enhanced mobility but also incorporates advanced safety measures. This thesis report presents the design, implementation, and evaluation of these electric wheelchair accessories based on the force analysis results, simultaneously focusing on their practicality, usability, and overall impact on the user's quality of life.