Automatic Trolley Human Follower

Amir Hafizul, Abd Malek (2014) Automatic Trolley Human Follower. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This project has successfully produced an Automatic Trolley Human Follower for general or industrial user. An automatic trolley human follower is developed to help a user or production industry to reduce the utilization of human energy in order to carry heavy things. This automatic trolley human follower is controlled by a PIC 16F877A microcontroller that can follow the user automatically with integrated circuit of ultrasonic and IR sensor. The 12V DC motor was used as the power supplied to move the trolley automatically follow a user in hypermarket or industrial use. In this project a robotic vehicle is fabricated which runs like a regular trolley by carrying tools from place to another. This is done by using a set of receiver and transmitter ultrasonic sensor to detect a user in a 1 meter range and it will follow the user. Ultrasonic receiver will be placed on the user belt and it transmitter placed in the body of trolley while IR sensor is use to detect an obstacle and completely to trace a user in range 1 meter. The sensitivity of the IR Sensor to detect the blocking object was different based on color. The average distance for bright object detected is 34.7cm while for dark color is 15.2cm. However this trolley has second mode function which can be manually controlled by radio frequency remote control if the automatic was not properly function in the limited space. The Automatic Trolley Human Follower was designed with dimension of sizes 75cm length, 50cm width and 60cm height. The maximum loads that can be carrying by the trolley are 120kg with speed of 13cm/s.

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