1. Ultrasonic Sensor Made By: 1.Hadeer Radwan 2.Alaa Mustafa 3.Amany Amr

2. Ultrasonic Sensor Ultrasonic sensors (also known as transceivers when they both send and receive) work on a principle similar to radar or sonar which evaluate attributes of a target by interpreting the echoes from radio or sound waves respectively. Ultrasonic sensors generate high frequency sound waves and evaluate the echo which is received back by the sensor. Sensors calculate the time interval between sending the signal and receiving the echo to determine the distance to an object.radarsonar

3. Systems typically use a transducer which generates sound waves in the ultrasonic range, above 18,000 hertz, by turning electrical energy into sound, then upon receiving the echo turn the sound waves into electrical energy which can be measured and displayed.

4. Advantages Ultrasound can be directed as a beam. Ultrasound obeys the laws of reflection and refraction. Ultrasound is reflected by objects of small size. Disadvantages Ultrasound propagates poorly through a gaseous medium. The amount of ultrasound reflected depends on the acoustic mismatch

5. Main Form Of U.S Instrument

6. Another Form Of U.S Instrument

7. Simple Circuits

9. Actual Circuit

10. Images Taken By U.S For Fetus