A Study on Construction of ELF Band Electromagnetic Field Measuring System and Application to Tectonic Activity Detection

ELF波段电磁场测量系统构建及其在构造活动探测中的应用研究

基本信息

批准号：
17206042
负责人：
TAKUMI Ichi
金额：
$ 28.79万
依托单位：
Nagoya Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

(1) Construction of phased array network to observe EM radiation: We increased the number of observation sites. We implemented digital filter to narrow down observing frequency band. We achieved accurate timestamp of data by GPS.(2) Development of the high-sensitive magnetic field sensor and high-gain filtering amplifier: We reduced size and weight of the sensor, and set it in the weather-resistant case for easy setting and stability.(3) Development of phase sensitive detector with GPS synchronization and data logging device: We developed the timing synchronous circuit using GPS. We achieve data logging system based on real-time Linux.(4) Development of detection system for electromagnetic radiation from crust by statistical model and acoustic signature: We proposed automatically detection method monitoring on liner prediction errors. We got knowledge that indicates the existence of earthquake-precursor from detected anomalous radiations around occurrence of west-off Fukuoka earthquake.(5) Source Estimation of anomaly electromagnetic radiation and deliberation of probability model: We confirmed the observed data are classified with map position by GTM when using cepstrum coefficients as feature parameter.(6) Deliberation of filtering method and deliberation of anomalous radiation detection method: We proposed background noise reduction methods by TPE using absolute errors, ICA and NMF. Each method removes global background noise well.(7) Signal analysis by neural network: We made neural net using wavelet-transformed observed data as reference. We confirmed our neural net could detect anomalous signal.(8) Analysis of electromagnetic field: We found out anomalous electromagnetic radiation can be detected automatically by monitoring the variance of magnetic field azimuth.

（1）构建相位阵列网络以观察EM辐射：我们增加了观察位点的数量。我们实施了数字过滤器，以缩小观察频带的缩小。我们通过GPS实现了数据的准确时间戳。（2）开发高敏磁场传感器和高增强过滤放大器的开发：我们降低了传感器的尺寸和重量，并将其设置在易于设置和稳定性的耐候性案例中。（3）使用GPS同步和数据游行设备开发相位敏感的探测器：使用定时循环gps gps gps gps gps。我们基于实时Linux实现数据记录系统。（4）通过统计模型和声学签名从外壳中开发用于电磁辐射的检测系统：我们提出了对衬里预测错误的自动检测方法监视。我们得到的知识表明，在发生福库卡地震西部的发生异常辐射中存在地震前体的存在。（5）概率模型的电磁辐射异常的源估计以及概率模型的审议：我们确认了使用GTM在cepstrum cortereff and progient of progient and-aS-soge dodimation and-aps of feative and-aps of feative and progient of-aps of-sop of-afor sogipect and a-soge of。辐射检测方法：我们使用绝对误差ICA和NMF提出了TPE的背景降噪方法。每种方法都很好地消除了全局背景噪声。（7）通过神经网络进行信号分析：我们使用小波转换的观察到的数据作为参考进行了神经网。我们确认我们的神经网可以检测到异常信号。（8）电磁场的分析：我们发现可以通过监测磁场方位角的方差来自动检测到异常的电磁辐射。

项目成果

期刊论文数量（239）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Stationary Signal Estimation Using a Tensor Product that Minimizes Absolute Error (in Japanese)

使用最小化绝对误差的张量积进行平稳信号估计（日语）

DOI：
发表时间：
2006
期刊：
Technical Report of IEICE vol. 105, no. 676
影响因子：
0
作者：
Liu Y.;Matsuhisa H.;Utsuno H.;前田隆太郎;K. Iwai;戸田英樹,小早川達,山田博,山海嘉之;森敬一朗;Akitoshi Itai
通讯作者：
Akitoshi Itai

極超長波ウエーブレット解析による地震前兆電磁波の検出

利用超长波小波分析检测地震前兆电磁波