A Laser-Based Device for Work Site Stability Assessment

用于工作现场稳定性评估的激光设备

• 批准号: 7278614
• 负责人: XIAOQING SUN
• 金额: $ 36.33万
• 依托单位: AAC INTERNATIONAL
• 依托单位国家: 美国
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-07-01 至 2009-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7278614
• 关键词: Laser; Based; Device; Work; Site

DESCRIPTION (provided by applicant): Summary: A laser-based acoustic emission (AE) detection device is proposed for work site structural stability assessment. This new device will take advantage of innovations in laser ultrasonics, artificial intelligence (Al) and advanced acoustic emission technology to provide mine workers with a unique instant, real time stability assessment of immediate rock structures in the working environment, which was not attainable in the past. Nonlinear optical interferometry based on two-wave mixing / photo-induced electromotive force techniques will be used for AE signal detection from rock structures in mine sites. Al criteria will be established by wave pattern recognition to identify unstable areas in mine sites. This research will also result in a unique non-contact monitoring device for acoustic emission/microseismic studies, which will be very useful in many areas of application. The primary objective of the Phase II research is to develop the prototype of the AE detector and test it in real-world mining facilities. The primary objective consists of six specific aims: 1. instrumentation development, 2. pre-field experiment preparation, 3. in-situ data collection, 4. Al criteria development, 5. system integration and in-situ trial, and 6. documentation and reporting. Relevance to Public Health: The innovation will contribute to a reduction the occupational injuries and fatalities caused by roof falls, sidewall crumples, stope collapses, and slope slides, etc., in the mining industry. The research and development addresses the miner's safety and contributes to ensuring the mineworker's right to "safe and healthful working conditions" (Occupational Safety and Health Act of 1970).

描述(申请人提供)：摘要：提出了一种基于激光的声发射(AE)检测设备，用于工作现场结构稳定性评估。这一新设备将利用激光超声波、人工智能(Al)和先进的声发射技术的创新，为煤矿工人提供独特的即时、实时的工作环境中岩石结构的稳定性评估，这在过去是无法实现的。基于二波混频/光生电动势技术的非线性光学干涉技术将用于矿山现场岩石结构声发射信号的检测。将通过波形模式识别建立AL标准，以识别矿场中的不稳定区域。这项研究还将产生一种独特的非接触式监测设备，用于声发射/微地震研究，这将在许多应用领域非常有用。第二阶段研究的主要目标是开发声发射探测器的原型，并在现实世界的采矿设施中进行测试。主要目标包括六个具体目标：1.仪器开发；2.现场试验准备；3.现场数据收集；4.制定AL标准；5.系统集成和现场试验；6.文件编制和报告。与公共健康相关：这项创新将有助于减少采矿业因顶板坍塌、井壁塌陷、采场坍塌和斜坡滑坡等造成的职业伤害和死亡。研究和开发涉及矿工的安全，并有助于确保矿工享有“安全和健康的工作条件”的权利(1970年“职业安全和健康法”)。