| 用于微动探测的低成本自存储式数字地震检波器 |
| |
| 引用本文： | 卢川,王肃静,张妍,游庆瑜,戴靠山.用于微动探测的低成本自存储式数字地震检波器[J].地球物理学报,2015,58(6):2148-2159. |
| |
| 作者姓名： | 卢川 王肃静 张妍 游庆瑜 戴靠山 |
| |
| 作者单位： | 1. 中国科学院地质与地球物理研究所油气资源研究重点实验室, 北京 100029;
2. 中国科学院大学, 北京 100049;
3. 同济大学, 上海 200092 |
| |
| 基金项目： | 国家重点基础研究发展计划(973)(2013CB733204)和国家自然科学基金(41304045)联合资助. |
| |
| 摘 要： | 微动探测是利用地球表面的天然震动信号进行探测的被动源探测方法.相对于传统的物探方法,微动探测野外施工灵活,阵列形状多样,受施工场地限制小,对施工环境影响小.目前进行微动探测所用的地震检波器大多成本较高、重量和体积大,不便于运输与大规模布设.本文由微动探测方法的特点出发,优化改造了自行研发的低成本自存储式数字地震检波器,使其性能满足微动探测的需要.通过对地震计系统噪声的详细分析、微动探测原理的讨论,结合现场试验数据,探讨了该检波器应用于大规模微动探测的可行性.
|
| 关 键 词： | 地震检波器 微动勘探 噪声 低成本 |
| 收稿时间： | 2014-05-13 |
A new low-cost no-cable digital geophone for microtremor survey |
| |
| LU Chuan,WANG Su-Jing,ZHANG Yan,YOU Qing-Yu,DAI Kao-Shan.A new low-cost no-cable digital geophone for microtremor survey[J].Chinese Journal of Geophysics,2015,58(6):2148-2159. |
| |
| Authors: | LU Chuan WANG Su-Jing ZHANG Yan YOU Qing-Yu DAI Kao-Shan |
| |
| Institution: | 1. Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Tongji University, Shanghai 200092, China |
| |
| Abstract: | Microtremor survey is a kind of passive-source methods which uses ambient ground tremors for geological investigation. Compared with traditional geophysical methods, it is more flexible, cost-efficient, and environmentally friendly. Most currently used geophones are expensive and bulky, and therefore inconvenient to large-scale deployment. In this study, a no-cable low-cost geophone was optimized to suit for large-scale microtremor survey.The method of optimization is based on the following four points: First, it selects a sensor through the analysis of the self-noise of to meet the needs of microtremor survey.Second,it chooses the right operational amplifier and AD conversion module.Third, it integrates design of the entire system without using external module.And fourth,it makes a low-cost design of the geophone system, including selection of low-cost hardware components and reducing the amount of software code. Finally, the optimized geophone was used in three areas with different geological conditions in order to verify the rationality of the improvement and the possibilities for large-scale microtremor survey.The purpose of optimization has been achieved in this research. The no-cable geophone wrights only 600 g, and the maximum average power cost does not exceed 0.1 mW. The entire system costs less than 2000 RMB. The most important thing is the optimized geophone can record the microtremor signal from 0.5 to 20 Hz effectively. Experiments show that in different geological conditions the geophone can be setup quickly and work smoothly and reliably. The results of microtremor survey experiments are consistent with the existing geological data.Because the new geophone is much cheaper than the existing microtremor survey equipment, it is possible to use it in low-cost large-scale survey. The optimized geophone has a very small volume and light weight, and can be rapidly emplacedinto a variety of detector arrays. After the emplacement of large number of geophones, it can easily and quickly conduct survey to two- dimensional or three-dimensional velocity structure of the area. Such microtremor survey with environment-friendly and low-cost advantages has broad application prospects. |
| |
| Keywords: | Geophone Microtremor survey Noise Low-cost |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
|
