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Bubble sensor
Bubble senors are used to detect the presence of bubbles in fluid filled tubes. They play a vital role in many fields, including medical technology, process control, pharmaceuticals, and the petroleum industry. The most common type of sensors used are ultrasonic or capacitor based.
== Ultrasonic sensors ==
Ultrasonic sensors use two techniques to detect bubbles, one method involves transmitting sound waves from a transducer through the fluid to a second transducer that detects the waves. A second method involves pulse-echo, sound waves are transmitted to the fluid, reflected and received by the same transmitter that sent it. In both of these methods bubbles will have an effect on the velocity, attenuation and the scattering of the sound, thus they are easily detected.〔W. N. Bostrom, D. D. Griffin, R. L. Klienberg and K. K. Liang, "Ultrasonic bubble point sensor for petroleum fluids in remote and hostile environments," Measurement Science and Technology, vol. 16, pp. 2336-2343, 2005.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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