Cheap Optical Transducers (CHOTs)

用（约200）字描述拟进行的研究，适合非专业读者。本项目将开发一系列新颖的廉价光学传感器（CHOT），用于产生和检测超声波。这些CHOT有可能大大便宜（> 3个数量级），并且与现有的基于压电的换能器系统相比具有许多明显的优点，（压电）或非接触式CHOT可能是如此便宜，以至于它们有可能彻底改变NDE/T -而不是拆除结构为了使用昂贵的传统传感器进行测试，可以将许多CHOT永久地安装到结构中。然后可以使用自由空间光学器件来激活和读取这些，而无需任何布线。它们可用于运动部件（例如内部和发动机运行期间），并可用于恶劣环境（例如在高温下无法使用压电材料）。CHOT对结构的影响也非常小，并且可以以极低的成本容易地安装和移除。虽然该提案将集中于开发用于NDE/T应用的CHOT，但还有许多其他应用，例如作为食品和生物样品的传感器

Describe the proposed research using (about 200) words geared to the non-specialist reader.This project will develop a range of novel cheap optical transducers (CHOTs) for the generation and detection of ultrasound. These CHOTs have the potential to be significantly cheaper (> 3 orders of magnitude) than existing piezoelectric based transducers and have many distinct advantages over existing transducer systems either contacting (piezoelectrics) or non contacting (laser ultrasound and EMATs).CHOTs may be so cheap that they have the potential to revolutionise NDE/T - instead of dismantling the structure (say an aircraft engine) for testing using an expensive traditional transducer it will be possible to install many CHOTs permanently into the structure. These may then be activated and read using free space optics without any wiring. They can be used on moving parts (for instance inside and engine during operation) and can be used in hostile environments (for instance at elevated temperatures where piezoelectrics cannot be used). CHOTs also have a very low impact on the structure and may be easily installed and removed at extremely low cost. While this proposal will concentrate on developing CHOTs for NDE/T applications there are many other applications, for instance as sensors for foodstuffs and biological samples