Characterisation of hydrophone sensitivity with temperature using a broadband laser-generated ultrasound source
Characterisation of hydrophone sensitivity with temperature using a broadband laser-generated ultrasound source
复制标题
使用宽带激光产生的超声源表征水听器灵敏度随温度的变化
DOI：
10.1088/1681-7575/ace3c3
复制
发表时间：
2023
期刊：
影响因子：
2.4
通讯作者：
Bakaric M
中科院分区：
文献类型：
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作者：
Bakaric M
在这项工作中，我们提出了一种新的方法来表征水听器灵敏度随温度的相对变化，解决了超声计量领域测量的一个关键方面。我们的研究集中在一个选择的微型超声水听器通常用于医疗应用。该方法是基于使用水作为温度敏感的激光生成的超声（LGUS）源进行校准，允许在很宽的温度范围内灵活的表征。使用LGUS方法和建立的自互易方法进行测量。我们的结果表明，两种方法之间的良好的一致性在5%以内，验证了LGUS方法的有效性。我们发现，在17 ℃至50 ℃的研究温度范围内，受试水听器的灵敏度表现出较低的温度依赖性，小于− 0.2%/℃。所提出的LGUS方法提供了更大的灵活性比目前的方法，因为它允许表征的膜水听器与小元件尺寸和非电换能器。将LGUS法测得的相对灵敏度变化与室温下的标准标定相结合，可以确定水听器灵敏度的绝对值。我们测量的扩展不确定度，在8 ° C的温度间隔下进行评估，平均为10%。我们的工作提供了宝贵的见解水听器灵敏度的温度依赖性，并奠定了基础，在这一领域的进一步调查。LGUS方法有望在未来得到增强，例如增加LGUS源的带宽和频域分析，以探索灵敏度随温度变化的频率依赖性。
In this work, we present a novel method for characterising the relative variation in hydrophone sensitivity with temperature, addressing a key aspect of measurements in the field of ultrasound metrology. Our study focused on a selection of miniature ultrasonic hydrophones commonly used in medical applications. The method is based on using water as a temperature-sensitive laser-generated ultrasound (LGUS) source for calibration, allowing for flexible characterisation across a wide temperature range. The measurements were performed using both the LGUS method and the established self-reciprocity method. Our results demonstrate good agreement within 5% between the two methods, validating the effectiveness of the LGUS approach. We found that the sensitivity of the tested hydrophones exhibited low temperature dependence less than− 0.2% per∘ C within the studied temperature range from 17∘ C up to 50∘ C. The presented LGUS method offers greater flexibility than current approaches as it allows for characterisation of membrane hydrophones with small element sizes and non-electrical transducers. By combining the relative sensitivity variation obtained through the LGUS method with the standard calibration at room temperature, absolute values of hydrophone sensitivity can be determined. The expanded uncertainty of our measurements, which was evaluated at temperature intervals of 8∘ C, was determined to be on average 10%. Our work provides valuable insights into the temperature dependence of hydrophone sensitivity and lays the foundation for further investigations in this area. The LGUS method holds promise for future enhancements, such as increased bandwidth of the LGUS source and frequency domain analysis, to explore the frequency dependency of sensitivity variation with temperature.
影响因子：
--
作者：
J. Laufer;C. Elwell;D. Delpy;P. Beard
通讯作者：
P. Beard