力学与实践 ›› 2010, Vol. 32 ›› Issue (2): 100-102.DOI: 10.6052/1000-0879-2009-188

• 应用研究 • 上一篇    下一篇

大阻尼高灵敏度复合地震检波器的研究

张改慧 胡时岳   

  1. 西安交通大学航天航空学院工程力学系
  • 收稿日期:2009-04-27 修回日期:2009-05-21 出版日期:2010-04-08 发布日期:2010-04-08

A COMPOSITE GEOPHONE WITH HEAVY DAMPING AND HIGH SENSITIVITY

  • Received:2009-04-27 Revised:2009-05-21 Online:2010-04-08 Published:2010-04-08

摘要: 研制了一种新型高灵敏度、大阻尼、低输出阻抗复合型地震检波器,并 通过利用微电子技术增大检波器阻尼比系数的方法,实现检波器主频区频率特性改造,使速 度检波器在有效使用频带内达到加速度特性. 现场试验结果表明,该检波器单显记录信噪比 较高,视频率高,能量强,具有拓宽地震子波频带和提高主频的能力,适合于高分辨率地震 勘探使用.

关键词: 地震检波器, 高分辨率地震勘探, 阻尼, 灵敏度, 频率特性

Abstract: A new composite geophone, with a number of advantages such as high sensitivity, heavy damping ratio and low output impedance, is developed based on micro-electronic technology, which is adopted to modify the geophone frequency characteristics in the main frequency region to approach the acceleration characteristics by increasing damping of the geophone. The in-situ testing results show that the data recorded by the composite geophone have high S/N ratio, high visual frequency and strong energy, and the geophone has the ability to compensate the high frequency energy and to widen the bandwidth of seismic wavelet, and can be used for high resolution seismic explorations.

Key words: geophone, high resolution seismic exploration, damping, sensitivity, frequency characteristic