Study of new intergrated sensor systems using piezoelectric fibre composites for material evolution

使用压电纤维复合材料进行材料演化的新型集成传感器系统研究

• 批准号: 227091-2009
• 负责人: Wang, Xiaodong
• 金额: $ 2.62万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=523904
• 关键词: Study; new; intergrated; sensor; systems

The development of small, sensitive, durable, inexpensive, real-time sensors has received considerable attention from research and industrial communities in engineering. Piezoelectric sensors show great potential in various engineering applications, ranging from structural health monitoring to chemical and biological agent identification. Their high electromechanical coupling and quick response enable the effective conversion of mechanical measurements into electric signals with high sensitivity and high resolution. The applications of these piezoelectric sensors are widely spread into diverse areas. The detection mechanism is, however, unique and based primarily on measuring characteristic parameters of elastic waves traveling in materials, such as wave speed, amplitude, and attenuation to identify physical changes of these materials. These piezoelectric sensors are currently used, for example, in the nondestructive evaluation of structures to detect cracks, in the characterization of thin films to determine their thickness and modulus, and in chemical and biological surface-acoustic-wave devices to measure the mass absorbed at the surface to identify chemical and biological species. It is the objective of the current project to develop new integrated piezoelectric acoustic sensors for quantitative material evaluation. Piezoelectric fibres, which show much higher electromechanical coupling than traditional piezoelectric materials, will be used to design the integrated sensors. Both theoretical and experimental studies will be conducted. The theoretical study will be focused on the development of micromechanical models capable of describing the complicated electromechanical behaviour of the piezoelectric sensors under both static and dynamic loading conditions. The experimental study will encompass the testing and application of the new sensors. Using such an integrated sensor system, a new technique will be developed to quantitatively evaluate the interior properties of materials. In the long term, the outcome of the current research could be used in the design of the next generation of acoustic sensors not only for engineering materials evaluation but also for chemical and biological species detection.

研制小巧、灵敏、耐用、廉价、实时的传感器已受到工程界和研究界的广泛关注。压电传感器在各种工程应用中显示出巨大的潜力，从结构健康监测到化学和生物制剂识别。它们的高机电耦合和快速响应使机械测量有效地转换为具有高灵敏度和高分辨率的电信号。这些压电传感器的应用广泛分布在各个领域。然而，该检测机制是独特的，主要基于测量弹性波在材料中传播的特征参数，如波速、振幅和衰减，以识别这些材料的物理变化。例如，这些压电传感器目前被用于结构的无损评估以检测裂缝，在薄膜的表征中以确定其厚度和模量，以及在化学和生物表面声波装置中测量表面吸收的质量以识别化学和生物物种。本课题的目标是开发用于材料定量评价的新型集成压电声传感器。压电纤维具有比传统压电材料更高的机电耦合性能，将被用于集成传感器的设计。将进行理论和实验研究。理论研究将集中于能够描述压电传感器在静态和动态加载条件下复杂机电行为的微力学模型的发展。实验研究将包括新传感器的测试和应用。利用这种集成传感器系统，将开发出一种定量评估材料内部特性的新技术。从长远来看，目前的研究成果不仅可以用于工程材料评估，还可以用于化学和生物物种检测的下一代声学传感器的设计。