球形传感器的自我互惠校准,使用球形外中的边界反射
Liuqing Yang1,2, Jun Zhang1
1Hangzhou Applied Acoustics Research Institute, Hangzhou, Zhejiang 311400, China.
The Journal of the Acoustical Society of America
|August 13, 2024
概括
一种新的自我互惠方法准确地校准了球形外中的球形传感器. 这种技术为高压和变温度环境提供了优势.
科学领域:
- 声学 声学 在声学方面
- 转换器校准 转换器校准
- 计量学 计量学 计量学
背景情况:
- 球形传感器的准确校准对于各种声学应用至关重要.
- 现有的方法,如三传感器球形波互惠法,需要大量的空间.
- 需要高效且适应性强的校准技术,特别是在具有挑战性的条件下.
研究的目的:
- 开发和验证一种自我互惠方法,用于在球体外内校准球形传感器.
- 将自我互惠方法的准确性和实用性与既有技术进行比较.
- 评估专业环境的自我互惠方法的潜在优势.
主要方法:
- 利用格林函数和电声互惠原理来计算互惠常数.
- 通过计算传感器在各种声场中的接收力,开发了灵敏度校正.
- 实施了一个实验设置,以校准20和30毫米直径的变频器 (2563 kHz) 在一个直径500毫米,厚2毫米的球形外中.
主要成果:
- 与三传感器方法相比,自我互惠方法的准确性很高,最大差异为-1.4dB.
- 在指定的频率范围和外尺寸内,传感器的校准成功实现.
- 这种方法在不同尺寸 (20和30毫米) 的传感器中被证明是有效的.
结论:
- 自我互惠方法为球形转换器在球形外中的校准提供了一个可行的和准确的替代方案.
- 这种方法比传统方法需要更少的体积,使其适合在现场或有限的应用.
- 该技术在极端条件下进行传感器校准,如高水静压和波动温度等,显示出有前途.
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