Design and Manufacture of Portable Strong Motion Instrument for Array Observation and Observation/Analysis Manual

便携式强震阵列观测仪的设计与制造及观测/分析手册

• 批准号: 07558056
• 负责人: KUDO Kazuyoshi
• 金额: $ 11.78万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07558056/
• 关键词: mobil observation; portable strong motion instrument; array observation; wide-band, high-dynamic range; propagation of strong motion; surface geology; 軽量小型強震計; 広帯域高ダイナミックレンジ; 強震動伝播; 地震破壊過程; 強震伝播

This study focused on manufacturing portable strong motion observation instruments and developing array observation methods, certifying a easy mobile observation just after a large earthquake occurrence and/or in case of emergency. In the first year of this project, we compared the features of exiting instruments, surveyed the possible new specifications of instruments and manufactured a sensor and a data logger as a trial. Next year, we examined the trials obtaining the results from several tests and determined finally the specifications for new instruments. A moving-coil type accelerometer was selected as a sensor, because it require no power supply. The principal specifications of the sensor are that it is observable from microtremors level until very strong one like the Kobe cases (150cm/s) and it has a flat response from 0.07Hz to 100Hz. The data logger used 24 bits A/D converter achieved a dynamic ange of 130 dB and it needs less power supply. The total weight of the new instrument without battery is 3 kg. In the third year, we examined the new instruments in the field for array observation of earthquake as well as microtremors, not only in Japan but also in U.S.A.and Greece. It was confirmed through the various field tests that the new instruments were very useful for mobile array observations.

这项研究的重点是制造便携式强震观测仪器和发展阵列观测方法，以确保在大地震发生后和/或紧急情况下易于移动的观测。在该项目的第一年，我们比较了现有仪器的特点，调查了可能的新仪器规格，并试制了传感器和数据记录仪。明年，我们审查了从几次测试中获得的结果的试验，并最终确定了新仪器的规格。选用动圈式加速度计作为传感器，因为它不需要电源。该传感器的主要特点是从微震到很强的震级都能观测到，如神户震例(150 cm/S)，从0.07赫兹到100赫兹具有平坦的响应。该数据记录仪采用24位A/D转换器，动态范围可达130分贝，且所需电源较少。不带电池的新仪器总重量为3公斤。在第三年，我们检查了现场地震和微震阵列观测的新仪器，不仅在日本，而且在美国和希腊。通过各种现场试验证实，新仪器对移动阵列观测非常有用。

项目成果

Irikura, k., T.Iwata, H.Sekiguchi, et al.: "Lesson from the 1995 Hyogo-Ken Nanbu earthquake : Why were such destructive motions generated buildings?" J.Nat.Disas.Sci. 17-2. (1997)

Irikura, k.、T.Iwata、H.Sekiguchi 等人：“1995 年兵库县南部地震的教训：为什么这种破坏性运动会产生建筑物？”

Sasatani,Tsutomu,: "Source Characteristics of the 1994 Hokkaido Toho-Oki Earthquake Deduced from Wide Band Strong Motion Records" Jour.Fac.Sci.,Hokkaido Univ.,Ser.VII(Geophysics),. Vol.10,No.2. 269-293 (1997)

Sasatani，Tsutomu，：“从宽带强震动记录推导出的1994年北海道东丰冲地震的震源特征” Jour.Fac.Sci.，北海道大学，Ser.VII（地球物理学），。

Iwata, T., K.Hatayama, H.Kawase, K.Irikura, and K.Matsunami: "Array observation of aftershocks of the 1995 Hyogoken-nambu earthquake at Higashinada ward, Kobe city" J.Natural Disas.Sci.16. 41-48 (1995)

Iwata, T.、K.Hatayama、H.Kawase、K.Irikura 和 K.Matsunami：“神户市东田区 1995 年兵库县南部地震余震的阵列观测”J.Natural Disas.Sci.16。

南雲秀樹・笹谷努・古村美津子 他: "軟弱地盤の地震波増幅特性-北海道上ノ国町-" 地震2. 50. 157-172 (1997)

南云英树、筱谷勉、古村光子等：“软土地基地震波放大特性-北海道上国町-”地震2.50.157-172（1997）

Iwata,T., K.Hatayama, H.Kawase, et al.: "Array observation of aftershocks of the 1995 Hyogoken-nambu earthquake at Higashinada ward, Kobe city" J.Natural Disas.Sci.16. 41-48 (1995)

Iwata,T.、K.Hatayama、H.Kawase 等：“1995 年神户市东田区兵库县南部地震余震阵列观测”J.Natural Disas.Sci.16。