The Direct Reading Of Ultrasound Distance Meter

Siti Afizah , Mohd Ali Hanafiah (2006) The Direct Reading Of Ultrasound Distance Meter. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Ultrasound is sound with a frequency approximately above 40kHz, greater than the upper limit of human hearing. The ultrasound waves follow the rules of propagation and reflection; it can be reflected and absorbed by a medium. The ultrasound can be produced by sending a high frequency alternating for example using ultrasonic transmitter. Hence this project is done to implement the direct reading of ultrasound distance meter. This approach is used in order to measure the distance (in centimeter) using ultrasound signal to a target. Air is used as the medium for the ultrasound to transmit while the distance is horizontally located The SRF04 consists of transmitter and receiver, requiring a short trigger pulse and providing an echo pulse. The echo line is therefore a pulse whose width is proportional to the distance to the object. Theoretically, ultrasound signal is send to a target then time is taken by counter (clock) and finally the distance will appear at 7- segment display panel.

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