Methods to calibrate the absolute receive sensitivity of single-element, focused transducers.
Methods to calibrate the absolute receive sensitivity of single-element, focused transducers.
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DOI：
10.1121/1.4929620
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发表时间：
2015-09
期刊：
影响因子：
--
通讯作者：
Kyle T. Rich;T. D. Mast
中科院分区：
文献类型：
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作者：
Kyle T. Rich;T. D. Mast
改进的宽带接收校准技术将有助于用单元件聚焦被动空化探测器进行声发射的绝对压力测量。在这里，校准方法的特点是绝对的，频率相关的接收灵敏度的球形聚焦，单元件换能器使用脉冲回波和一发一收技术。通过在换能器焦点处产生来自小直径源的脉冲，并使用这里确定的接收灵敏度将由校准水听器测量的绝对压力与聚焦换能器的绝对压力进行比较，来对聚焦接收器上的这些校准方法进行验证。
Absolute pressure measurements of acoustic emissions by single-element, focused passive cavitation detectors would be facilitated by improved wideband receive calibration techniques. Here, calibration methods were developed to characterize the absolute, frequency-dependent receive sensitivity of a spherically focused, single-element transducer using pulse-echo and pitch-catch techniques. Validation of these calibration methods on a focused receiver were made by generating a pulse from a small diameter source at the focus of the transducer and comparing the absolute pressure measured by a calibrated hydrophone to that of the focused transducer using the receive sensitivities determined here.