Bluetooth Controlled Robotic Arm

Robotic Arm

• Problem Statement:

Without risking human life or limb, robots can replace humans in some hazardous duty service. Take for example bomb disposal. Robots are used in many bomb disposal squads across the nation. Typically, these robots resemble small armored tanks and are guided remotely by a person using a wireless medium of communication. Robotic arms can grab a suspected bomb and place it in an explosion-proof safe box for detonation and/or disposal.

Similar robots can help clean up toxic wastes. Robots can work in all types of polluted environments, chemical as well as nuclear. They can work in environments so hazardous that an unprotected human would quickly die. The nuclear industry was the first to develop and use robotic arms for handling radioactive materials. Robotic arms allowed scientists to be located in clean, safe rooms operating controls for the robotic arms located in radioactive rooms.

• Aims and Objectives:

Following are the objectives of this project:

• To control the movement of the vehicle having the robotic arm through an android platform and Bluetooth.
• To control the movement of the robotic arm wireless through Bluetooth from an android device.
• To make arm capable of lifting an object from one place and placing it on another place.

• Literature Review:

A wireless control vehicle is an electrical vehicle which is powered by a 12 V DC battery or power supply. It uses motors for movement. These motors are usually gear DC motors. We control the speed and direction of these motors to move the vehicle forward, backward, left and right.

A robotic arm is a type of mechanical arm which is controlled electrically using motors. In robotic arm structures a small scale we usually use servo motors for precise movement at different angles. To grip an object, we also use servo motors for movement and gripping and object.

We use a Bluetooth module for wireless communication. This module takes commands which are sent from an android device through a specific application. Then we write a program and implement it through micro controllers. In the program we specify the tasks for each command received through Bluetooth device. For example, the speed and directions of motors etc. In this project we will control the direction and speed of the servo motors through the Bluetooth module.

A servomotor is a rotary actuator or linear actuator that allows for precise control of angular or linear position, velocity and acceleration. Servo motors are used for movement with precise accuracy. A servomotor is a closed-loop servomechanism that uses position feedback to control its motion and final position. The input to its control is a signal (either analogue or digital) representing the position commanded for the output shaft.

• Experimental Setup:

Figure 1(Experimental Setup for Android controlled Robotic Arm)