Advanced scanning infrared laser system for dynamic measurements on soft materials

用于软材料动态测量的先进扫描红外激光系统

• 批准号: RTI-2020-00314
• 负责人: Amabili, Marco
• 金额: $ 10.91万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=693676
• 关键词: Advanced; scanning; infrared; laser; system

Mechanical vibrations excited by fluid flow, of which the applicant is a renowned expert, affect the safe operation of systems of crucial importance to the public; they may result in the release of fissile material in the cores of nuclear plants as well as in the collapse of large human arteries such as the aorta and in the failure of relevant aortic grafts. Today it is not sufficient to avoid resonances according to traditional methods, but it is necessary to predict the severity of the vibrations reached during catastrophic events. Vibration testing requires the accurate measurement of prototypes by advanced non-contact systems like scanning laser Doppler vibrometers (SLDVs). These turnkey systems can measure the vibration mode shape of entire surfaces in terms of very accurate velocity and displacement of thousands of points. Decades of experience with SLDVs indicate that no other technology measures with nanometer accuracy slow displacements as well as millions of oscillations per seconds on thousands of points on surfaces in different conditions (e.g. immersed in water). The main experimental asset of the applicant is now one SLDV, the only one at McGill University, that, after allowing disparate researches, reached its end of life. Single point models are available, but for an important fraction of the price they measure one point only, thus they are hundreds of times less time effective. The requested equipment is a SLDV that substitutes and improves the current model. Differently than the old one available, it will employ a novel infrared laser technology, allowing the measurement of non-reflective surfaces such as rubbers and biomedical materials. While it will replicate and improve previous performances on metallic materials, it will also be a key factor in allowing for the first time the ex vivo dynamic characterization of large human arteries (e.g. aortas). The equipment is compact and flexible and, thanks to a video-camera, can be aimed intuitively onto structures giving as output intuitive animations, also used for training purposes. It is complete with PC-based capabilities, easy to use and extremely fast. Thus, it is easily and continuously available to any researcher needing it. It is rugged and can be transported to other locations without delay. It is safe, so it can be shared immediately and with little training between four graduate and two post-graduate students already supervised by the applicant. SLDV is by far the leading technology in vibration testing, so hands-on experience is absolutely necessary for any HQP pursuing employment in this field. The proposed SLDV will visualize on screen the direct impact of vibrations on systems at the base of modern life; they will improve the safety of the Canadian public and give data necessary to develop a new generation of cardiovascular prostheses and nuclear reactor cores. Consequently, the academic success and employability of HQP in these sectors will be highly facilitated.

流体流动的机械振动（申请人是著名专家）会影响对公众至关重要的系统的安全操作；它们可能导致核电核以及大型人动脉（例如主动脉和相关主动脉移植物）的崩溃。如今，根据传统方法避免共鸣是不够的，但是有必要预测灾难性事件期间振动的严重性。振动测试需要通过扫描激光多普勒振动仪（SLDV）等高级非接触系统（SLDVS）进行精确测量原型。这些交钥匙系统可以以非常准确的速度和数千点的位移来测量整个表面的振动模式。数十年的SLDV经验表明，没有其他具有纳米精度的技术度量缓慢位移，以及在不同条件下的表面上的数千点上每秒的数百万个振荡（例如，浸入水中）。申请人的主要实验资产现在是一个SLDV，这是麦吉尔大学唯一的实验资产，在允许不同的研究达到生命之后。单点模型可用，但是对于仅计量一个点的重要比例的重要一部分，因此效率降低了数百倍。请求的设备是替换并改善当前模型的SLDV。与可用的旧产品不同，它将采用一种新型的红外激光技术，可以测量非反射表面，例如橡皮图和生物医学材料。虽然它将复制并改善金属材料的先前性能，但它也将是首次允许大型人动脉（例如Aortas）的离体动态表征的关键因素。该设备紧凑且灵活，并且由于视频相机，可以直观地瞄准结构作为输出直观动画，也用于培训目的。它具有基于PC的功能，易于使用且非常快。因此，任何需要它的研究人员都可以轻松，连续地使用。它是坚固的，可以毫不拖延地运输到其他位置。它是安全的，因此可以立即共享，并且在四个毕业生和两名研究生研究生之间的培训很少，申请人已经监督了。迄今为止，SLDV是振动测试中的领先技术，因此，对于在该领域从事就业的任何HQP来说，动手经验都是绝对必要的。拟议的SLDV将在屏幕上可视化振动对现代生活基础系统的直接影响；他们将提高加拿大公众的安全，并提供必要的数据，以开发新一代的心血管假体和核反应堆核心。因此，HQP在这些领域的学术成就和就业能力将得到高度促进。