气压传感器作为0.01到10赫兹的声学对比-校准参考
Thomas B Gabrielson1, Carrick L Talmadge2, Chad M Smith1
1Penn State University, University Park, Pennsylvania 16802, USA.
The Journal of the Acoustical Society of America
|May 8, 2025
概括
一种新的校准方法使用气温计传感器作为超声波声学事件的参考. 这种方法为从直流到几十赫兹的传感器校准提供了低不确定性.
科学领域:
- 声学和信号处理
- 计量学和校准 计量学和校准
背景情况:
- 准确校准的超声波声学传感器 (DC到几赫兹) 对于检测,定位和描述超声波事件至关重要.
- 已建立的校准技术在低频下声范围内面临挑战,这导致在使用传统麦克风引用时的不确定性增加.
- 现有的方法难以提供可追溯的校准,不确定性低于几赫兹以下.
研究的目的:
- 开发一个可靠的参考声学传感器,用于对照-校准的超声波传感器和阵列.
- 建立一种方法,以低不确定性将直流连接到几十赫兹的频率范围.
- 为了使没有初级校准能力的实验室能够进行可追溯的校准.
主要方法:
- 使用气压传感器,以其在零频率的响应而闻名,作为比较校准参考.
- 开发了一个低通模式,用于气流参考传感器的复杂频率响应.
- 专注于保持整个目标频率范围内的空气指标的低不确定性.
主要成果:
- 成功模拟了气压传感器的频率响应,从直流到几十赫兹.
- 证明了使用气压计传感器作为低不确定性基准用于超声波校准的可行性.
- 在百分之一到十分之一赫兹区域实现可追溯的比较校准.
结论:
- 气压传感器,当适当建模时,可以作为低频声学校准的有效参考.
- 这种方法在具有挑战性的超声波范围内显著降低了校准不确定性.
- 这种方法使得更广泛的实验室能够获得准确的超声波校准.
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