The students use the principles of Sound Navigation and Ranging (SONAR) technique in this design. This principle is used for finding the distance and direction of a remote object underwater by transmitting sound waves and detecting reflections from it. First, a series of short ultrasonic pulses are transmitted using a transducer that changes voltage into sound waves.
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This parking aid device can detect an object within a range of 40cm with accuracy of 1cm in the distance interval of 15 to 40cm. For more details, visit: Ultrasonic Parking Aid.
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