Sisniega Beatriz, Gutiérrez Jon, Muto Virginia, García-Arribas Alfredo
Departamento de Electricidad y Electrónica, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Barrio Sarriena s/n, 48940 Leioa, Spain.
BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain.
Materials (Basel). 2020 Oct 22;13(21):4708. doi: 10.3390/ma13214708.
The resonance quality factor Q is a key parameter that describes the performance of magnetoelastic sensors. Its value can be easily quantified from the width and the peak position of the resonance curve but, when the resonance signals are small, for instance when a lot of damping is present (low quality factor), this and other simple methods to determine this parameter are highly inaccurate. In these cases, numerical fittings of the resonance curves allow to accurately obtain the value of the quality factor. We present a study of the use of different expressions to numerically fit the resonance curves of a magnetoelastic sensor that is designed to monitor the precipitation reaction of calcium oxalate. The study compares the performance of both fittings and the equivalence of the parameters obtained in each of them. Through these numerical fittings, the evolution of the different parameters that define the resonance curve of these sensors is studied, and their accuracy in determining the quality factor is compared.
共振品质因数Q是描述磁弹性传感器性能的关键参数。其值可通过共振曲线的宽度和峰值位置轻松量化，但是，当共振信号很小时，例如存在大量阻尼（品质因数低）的情况下，这种以及其他确定该参数的简单方法极不准确。在这些情况下，共振曲线的数值拟合可准确获得品质因数的值。我们开展了一项研究，探讨使用不同表达式对用于监测草酸钙沉淀反应的磁弹性传感器的共振曲线进行数值拟合。该研究比较了两种拟合的性能以及它们各自获得的参数的等效性。通过这些数值拟合，研究了定义这些传感器共振曲线的不同参数的演变，并比较了它们在确定品质因数方面的准确性。
