New Family of Inexpensive Broad Band Seismometers

新系列廉价宽带地震仪

• 批准号: 9360412
• 负责人: Igor Abramovich
• 金额: $ 6.5万
• 依托单位: PMD SCIENTIFIC, INC.
• 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: 1994-02-01 至 1995-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9360412&HistoricalAwards=false
• 关键词: New; Family; Inexpensive; Broad; Band

9360412 Abramovich In the past decade seismologists have witnessed a spectacular development in seismic instrumentation. Broad band seismometers now routinely record signals down to milliHertzs with a dynamic range approaching 140dB. Data collected by these instruments teach us much about the Earth's structure and seismic wave propagation. However, increasing demand to sample the wavefield with a much higher density cannot be satisfied by the use of these very expensive instruments. There is a strong need for inexpensive, portable seismometers with a broad band frequency response and dynamic range around 120 dB. We propose to develop a new seismometer based on molecular electronic technology. Previous attempts to use this technology have failed, especially in achieving acceptable transfer characteristics and long term parameter stability. Our preliminary theoretical and experimental studies have yielded new methods of overcoming these problems, which have allowed us to build and successfully test first conceptual prototypes. Our research would focus on proving the feasibility of a practical implementation of a molecular electronic seismometer with a consistent, broad frequency response and wide dynamic range. These instruments would be compact, rugged (no moving parts), very inexpensive and well fitted for field installation (no precise equilibration required).

小行星9360412 在过去的十年中，地震学家们目睹了地震仪器的惊人发展。 宽带地震仪现在通常记录的信号低至毫赫兹，动态范围接近140分贝。 这些仪器收集的数据告诉我们很多关于地球结构和地震波传播的知识。 然而，使用这些非常昂贵的仪器不能满足对具有高得多的密度的波场进行采样的日益增长的需求。 迫切需要具有宽带频率响应和120 dB左右动态范围的廉价便携式地震仪。 我们提出了一种基于分子电子技术的新型地震计。 之前使用该技术的尝试都失败了，特别是在实现可接受的传输特性和长期参数稳定性方面。 我们的初步理论和实验研究已经产生了克服这些问题的新方法，这使我们能够构建并成功测试第一个概念原型。 我们的研究将集中在证明一个实际实施的分子电子地震计具有一致的，广泛的频率响应和宽的动态范围的可行性。 这些仪器将是紧凑的，坚固的（没有移动部件），非常便宜，非常适合现场安装（不需要精确的平衡）。