Patimisco Pietro, Sampaolo Angelo, Mackowiak Verena, Rossmadl Hubert, Cable Alex, Tittel Frank K, Spagnolo Vincenzo
IEEE Trans Ultrason Ferroelectr Freq Control. 2018 Oct;65(10):1951-1957. doi: 10.1109/TUFFC.2018.2853404. Epub 2018 Jul 5.
Quartz tuning forks (QTFs) are piezo-transducers that have been implemented for numerous applications, such as chemical gas sensing, atomic force microscopy, rheology, and industrial process control. The most important parameter for QTFs' sensing application is the resonance quality factor (Q-factor). An experimental investigation and theoretical analysis of the influence of QTFs' geometries on the Q-factor of the flexural fundamental and first overtone resonance modes are reported. The resonance frequencies and related Q-factors for five different QTFs have been measured. The QTF response was recorded at different air pressures to investigate the influence of the surrounding medium on the Q-factor. A data analysis demonstrated that air viscous damping is the dominant energy dissipation mechanism for both flexural modes. Thermoelastic and support losses are additional contributions that depend on the QTF geometry. A study of the QTF damping mechanism dependence upon the prong geometry is also provided.
石英音叉（QTFs）是一种压电换能器，已被应用于众多领域，如化学气体传感、原子力显微镜、流变学和工业过程控制。QTFs传感应用中最重要的参数是共振品质因数（Q值）。本文报道了关于QTFs几何形状对弯曲基模和第一泛音共振模式的Q值影响的实验研究和理论分析。测量了五种不同QTFs的共振频率和相关Q值。在不同气压下记录QTF响应，以研究周围介质对Q值的影响。数据分析表明，空气粘性阻尼是两种弯曲模式下主要的能量耗散机制。热弹性损耗和支撑损耗是取决于QTF几何形状的额外因素。本文还研究了QTF阻尼机制对叉指几何形状的依赖性。
