An Optical Fiber-Grating Borehole-Seismic-Detector

光纤光栅钻孔地震探测器

• 批准号: 9412474
• 负责人: Robert Weis
• 金额: $ 1.01万
• 依托单位: Texas Christian University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-01 至 1995-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9412474&HistoricalAwards=false
• 关键词: Optical; Fiber; Grating; Borehole; Seismic

9412474 Weis High resolution seismic sensing could improve earth-drilling safety and efficiency, and provide a better exploration tool for geophysics. To achieve high spatial resolutions (on the order of 1 m) a seismic detector must have a frequency response up to about 2 kHz. Detectors made of fiber Bragg gratings should provide the required frequency response and be simpler, and more rugged than prior detectors. The immediate goals of this project are to design, fabricate, and test a prototype borehole seismic detection system using optical fiber-Bragg-gratings. The longer term goals of this project are: (1) build and test an array of fiber-grating seismic sensors, (2) refine the proposed seismic detection system, (3) establish a working relationship between RockBit International Inc. (RBI) and the faculty investigator, and (4) work together with RBI on further applications of optical fiber sensors to borehole and measurement-while-drilling (MWD) sensing. This project will be significant in at least three ways. First, the proposed seismic detector will be simple, reliable, easily multiplexed, and potentially less expensive than present detectors. Second, it will allow the faculty investigator and an undergraduate student to learn the problems and challenges of a local manufacturing company. Third, it will provide "real-world" engineering examples for instructional motivation in the classroom. ***

9412474 Weis高分辨率地震传感可以提高地球钻探的安全性和效率，为地球物理提供更好的勘探工具。为了实现高空间分辨率(约1米)，地震探测器的频率响应必须高达约2千赫。由光纤布拉格光栅制成的探测器应该提供所需的频率响应，并且比以前的探测器更简单、更坚固。该项目的近期目标是设计、制造和测试使用光纤布拉格光栅的井下地震检测系统原型。该项目的长期目标是：(1)建造和测试光纤光栅地震传感器阵列，(2)改进拟议的地震探测系统，(3)在RockBit International Inc.(RBI)和教研员之间建立工作关系，以及(4)与RBI合作，进一步将光纤传感器应用于钻孔和随钻测量(MWD)传感。这个项目将至少在三个方面具有重要意义。首先，建议的地震探测器将是简单、可靠、易于多路复用的，并且可能比现有的探测器更便宜。其次，它将让教员调查员和一名本科生了解当地制造公司的问题和挑战。第三，它将为课堂教学动机提供“真实世界”的工程实例。***