Mass Sensing with Damped Cantilever Beams

使用阻尼悬臂梁进行质量传感

• 批准号: 2749266
• 金额: --
• 依托单位: University of Glasgow
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2749266
• 关键词: Mass; Sensing; Damped; Cantilever; Beams

There are a range of applications which require the identification of the component molecules of gasses and fluids. These range from fluid purity or contamination sensors in pipes and tanks to atmospheric probes on satellites and probes. There are two dominant methods currently utilised, photo-spectrometry and mass spectroscopy. The former uses imaging systems to identify the light spectrum absorption of known molecules when exposed to light while the latter uses electrical ionisation and electro-magnets to identify the masses of every molecule in a sample and predict the likely molecules present. However, it has also been theorised that a vibrating cantilever beam, damped or undamped, can be utilised to detect the mass of any attached object by comparing the resonance frequencies of the plain beam against those of the same beam with the attached mass. By exposing a fluid or gas sample to a sufficiently small, oscillating cantilever beam, some of the component molecules will temporarily adhere to the beam and act as an attached mass. The shifts in resonance frequency caused by this adhesion would be useable to determine the mass and thus identity of the molecules. To date researchers have proposed equations and methods which would function in one and two dimensions.

有一系列的应用需要识别气体和流体的组成分子。这些传感器的范围从管道和储罐中的流体纯度或污染传感器到卫星和探测器上的大气探测器。目前使用的主要方法有两种，光谱法和质谱法。前者使用成像系统来识别已知分子在暴露于光时的光谱吸收，而后者使用电电离和电磁铁来识别样品中每个分子的质量并预测可能存在的分子。然而，它也已经被理论化，振动悬臂梁，阻尼或未阻尼，可以用来检测任何附着物体的质量，通过比较普通梁的共振频率与相同的梁与附着质量。通过将流体或气体样品暴露于足够小的振荡悬臂梁，一些组分分子将暂时粘附到梁上并充当附着质量。由这种粘附引起的共振频率的偏移将可用于确定分子的质量和身份。迄今为止，研究人员已经提出了在一维和二维中起作用的方程和方法。