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Definition of "Ultrasonic Proximity Sensors" |
A special sonic transducer is used for the ultrasonic proximity sensors, which allows for alternate transmission and reception of sound waves. The ultrasonic transducer emits a number of sonic waves which are reflected by an object, back to the ultrasonic transducer. After emission of the sound waves, the ultrasonic sensor will switch over to receive mode. The time elapsed between emitting and receiving is proportional to the distance of the object from the sensor. |
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