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首页> 外文期刊>Journal of Vibration and Acoustics >A Novel Accelerometer Mounting Method for Sensing Performance Improvement in Acoustic Measurements From the Knee
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A Novel Accelerometer Mounting Method for Sensing Performance Improvement in Acoustic Measurements From the Knee

机译：一种新型加速度计安装方法，用于感测膝关节中声学测量的性能改进

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In this study, we propose a new mounting method to improve accelerometer sensing performance in the 50 Hz-10 kHz frequency band for knee sound measurement. The proposed method includes a thin double-sided adhesive tape for mounting and a 3D-printed custom-designed backing prototype. In our mechanical setup with an electrodynamic shaker, the measurements showed a 13 dB increase in the accelerometer's sensing performance in the 1-10 kHz frequency band when it is mounted with the craft tape under 2 N backing force applied through low-friction tape. As a proof-of-concept study, knee sounds of healthy subjects (n = 10) were recorded. When the backing force was applied, we observed statistically significant (p ＜0.01) incremental changes in spectral centroid, spectral roll-off frequencies, and high-frequency (1-10 kHz) root-mean-square (RMS) acceleration, while low-frequency (50 Hz-1 kHz) RMS acceleration remained unchanged. The mean spectral centroid and spectral roll-off frequencies increased from 0.8 kHz and 4.15 kHz to 1.35 kHz and 5.9 kHz, respectively. The mean high-frequency acceleration increased from 0.45 mgRMS to 0.9 mgRMS with backing. We showed that the backing force improves the sensing performance of the accelerometer when mounted with the craft tape and the proposed backing prototype. This new method has the potential to be implemented in today's wearable systems to improve the sensing performance of accelerom-eters in knee sound measurements.
机译：在这项研究中，我们提出了一种新的安装方法，以提高50Hz-10 kHz频带中的加速度计感测性能以进行膝关节测量。该方法包括用于安装的薄双面胶带和3D印刷定制设计的背衬原型。在使用电动振动器的机械设置中，测量结果显示，在通过低摩擦带上的2N支撑力下安装有工艺磁带时，加速度计的感测性能下的测量值为13dB。作为概念验证研究，记录了健康受试者的膝关节（n = 10）。当施加背衬力时，我们观察到谱质心，光谱滚截面频率和高频（1-10kHz）根均方（RMS）加速度的统计显着（P <0.01）增量变化，而低 - 频率（50 Hz-1 kHz）RMS加速保持不变。平均光谱质心和光谱滚动频率分别从0.8 kHz和4.15kHz增加到1.35 kHz和5.9kHz。平均高频加速度从0.45mgrms增加到0.9毫升，背衬。我们表明，当安装工艺胶带和提出的背衬原型时，背衬力提高了加速度计的传感性能。这种新方法具有在当今可穿戴系统中实现的潜力，以改善膝关节测量中加速器-TERERS的传感性能。

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