Ultrasonic Based Distance Measurement system
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Date
2012
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Abstract
This report describes a distance measuring system based on ultrasonic sound utilizing the AT89C2051 microcontroller. The system transmits a burst of sound waves towards the subject and then receives the corresponding echo. The time delay of the transmitted and the received signal corresponds to the distance between the system and the obstacle. As the human ear's audible perception range is 20 Hz to 20 kHz, it is insensitive to ultrasonic waves, and hence the ultrasound waves can be used for applications in industries/vehicles without hindering human activity. They are widely used as range meters and Proximity detectors in industries also it can be used in parking assistance system. The distance measured is based on the speed of sound at 25°C ambient temperature and shows it on a 7-segment display.
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Keywords
distance measuring system, based on ultrasonic sound