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Distance Measurements by Taping

Distance Measurements by Taping

Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...

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Updated: Sep 15, 2025

The Measurement of Unsteady Surface Pressure Using a Remote Microphone Probe

The Measurement of Unsteady Surface Pressure Using a Remote Microphone Probe

Published on: December 3, 2016

远程麦克风虚拟传感与嵌套的麦克风子阵列.

Achilles Kappis¹, Jihui Aimee Zhang¹, Jordan Cheer¹

¹Institute of Sound and Vibration Research, University of Southampton, Southampton SO17 1BJ, United Kingdom.

The Journal of the Acoustical Society of America

|July 16, 2025

概括

此摘要是机器生成的。

嵌套的麦克风阵列使用压力和压力梯度数据改善远程声压估计. 与传统方法相比,配对距离近的圆形配置提供了更高的精度和更大的有效区域.

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Published on: May 1, 2018

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

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Last Updated: Sep 15, 2025

The Measurement of Unsteady Surface Pressure Using a Remote Microphone Probe

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Published on: December 3, 2016

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科学领域:

声学声学声学声学
阵列信号处理阵列信号处理
计算物理计算物理

背景情况:

在随机声场中准确的声压估计对于各种应用至关重要.
传统的远程麦克风技术通常仅依赖压力传感器,限制了性能.
远程麦克风技术 (RMT) 是一种在未测量的位置推断声学属性的方法.

研究的目的:

为了研究嵌套子数组用于增强远程声压估计的有效性.
为了比较使用压力对压力和压力梯度信息的阵列配置.
评估数组拓 (线性与圆形) 对估计准确性和空间覆盖率的影响.

主要方法:

远程麦克风技术的实施,使用嵌套的均线性和圆形阵列.
由压力传感器或距离较近的麦克风对组成的子阵列 (压力梯度).
通过实验测量和数值模拟进行性能评估,分析估计误差和空间范围.

主要成果:

结合压力梯度信息的嵌套阵列显著优于仅压力阵列.
圆形阵列配置比同等的线性配置表现出更高的性能.
增加的性能收益与更高的条件数相关,影响了不确定性的稳定性.

结论:

嵌套阵列,特别是那些使用压力梯度数据的阵列,在远程声压估计中提供了显著的改进.
阵列拓和压力梯度信息的整合是优化性能的关键因素.
在实际应用中,必须考虑提高精度和阵列稳定性之间的权衡.