1 MHz Ultrasonic Transducer Operating in Air
Conventional ultrasonic air transducers operating below 100 kHz have been utilized for position sensing in the range of 0.1–10m and provide several unique advantages. A typical application of an ultrasonic air transducer is to the wide range distance measurement of an optically transparent object placed “very close to” up to “relatively far from” the transducer. Additionally the real-time measurement can be done with simple signal processing. However, conventional air transducers have very wide beamwidths and relatively long pulse response characteristics which make it difficult to detect a small and nearby object.
KeywordsAttenuation Ferrite Rubber Acoustics
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