DESIGN & IMPLEMENTATION OF CAR DETECTION SYSTEM USING ULTRASONIC SENSORS WITH THE FINITE STATE MACHINE METHOD FOR CAR PARKING INFORMATION SYSTEM
With a steady increase in the number of cars in urban environments, the need for indoor parking area in the places like airports, offices, hospitals, shopping centres, also increases. To assist the visitors to find free parking lots in efficient way, an automatic parking information system is needed...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/46962 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | With a steady increase in the number of cars in urban environments, the need for indoor parking area in the places like airports, offices, hospitals, shopping centres, also increases. To assist the visitors to find free parking lots in efficient way, an automatic parking information system is needed. In this work which is part of an undergraduate final project in developing an automatic indoor parking information system, a car detection module based on ultrasonic sensors has been developed. The car detection module for each parking lot consists of a HC-SR04 ultrasonic sensor submodule and an Arduino-Uno microcontroller board. A finite-state machine (FSM) based algorithm in implemented in this module so that it has the ability to distinguish a car from smaller moving objects such as a person who may also be present in a parking lot. To distinguish a car from a person, the ultrasonic module transmits and receives repetitive ultrasonic signals which are collected as the distance signal timeseries of the object. The presence of a car in a parking lot results in a time-series with a certain pattern which is different from the case if a person instead of car is walking in the parking lot. It was found that the average duration of the detection signals is around 1.5 s if the object is a walking person. If this duration is more than 1.5 s, it will be assumed to be a car. For this application, connectios with long wires between the Arduino Uno and the HC-SR04 ultrasonic submodule are required. It was already confirmed that the use of long connection wires up to 10 m in the measurements does not signifactly change the shape of the received pulse signals of the HC-SR04 submodule, nor does it change the accuracy of the results in the measured distance. |
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