| 摘要 |
<p>ltrasonic bubble detection apparatus utilizes a typically one-piece, rigid housing (10) having a channel (12) defined therein for receiving flow tubing (14) in which bubbles are to de detected. First and second ultrasonic sending and receiving transducers (16, 18) are positioned on opposite sides of the channel (12), with an aperture communicating between each of the transducers and the channel, the apperture being filled with an elastomeric material (26, 28) capable of transmitting ultrasound energy between the channel (12) and each transducer. An air-containing slot (30) is positioned at the bottom of the channel to hinder the propagation of ultrasound energy through the housing (10) from the first to the second transducer (16, 18) by a route other than one passing through the elastomeric material.</p> |
