Design and fabrication of patient’s assistant robotic arm
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Date
2019-08
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UMT Lahore
Abstract
The Robotic arm was designed and implemented which did a job of drinking for disabled patients or for eldery persons. Basically, the designed was inspired from the human arm. The objective of this project is to develop an automated robot using the available resources at low manufacturing cost. We use the combined knowledge of designed, programming and electrical subjects. Each link has been first designed using Creo Parametric and then fabricated by using a 3mm thick aluminum sheet. The mechanical system of the robot comprised of locomotion, gripping and lifting mechanism. Each servo motor served the purpose of the movements of the elbow and shoulders joints. The electrical system of the robot comprised of servo motors, gripper motors and some other sensors like force sensitive resistance(Measures change in pressure). Servo motor of gripper took the voltage of 5V. A single buck convertor is used for the controlling of each servo whose main purpose is to convert +12V of AC supply to +12V of DC supply. The arduino has been programmed which provides specific motion to each motor. Grippers were designed to grip a glass from a predefined position and pre-defined shape of glass. The rotation of the gripper is 1800. Gear motors are used in gripper. The links were gave a motion in upward, downward, forward and backward. Ball bearings were used in the base for their rotaion. In fabrication of the prototype robot weight was always a pivotal factor.