WEKO3
アイテム
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直視記録方式による長周期地震計 第1報
https://doi.org/10.15083/0000033764
https://doi.org/10.15083/0000033764aaa949aa-b0a2-442b-a403-b7edb07a33cd
名前 / ファイル | ライセンス | アクション |
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ji0404017.pdf (513.0 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2008-05-30 | |||||
タイトル | ||||||
タイトル | 直視記録方式による長周期地震計 第1報 | |||||
言語 | ja | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15083/0000033764 | |||||
ID登録タイプ | JaLC | |||||
その他のタイトル | ||||||
その他のタイトル | A Pen-Writing Long-Period Seismograph Part 1. | |||||
著者 |
辻浦, 賢
× 辻浦, 賢 |
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著者別名 | ||||||
識別子 | 131810 | |||||
識別子Scheme | WEKO | |||||
姓名 | Tsujiura, Masaru | |||||
著者所属 | ||||||
著者所属 | 地震研究所 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We are developing long-period seismographs to add to our radio tele-recording seismograph system. The whole plan for long-period seismograph development is shown in Table 1. A horizotal seismsograph of type No. 1 in the table was designed and constructed. This seismograph has a high sensibility displacement transducer, shunt capacitance for lengthening period of pendulum, and high gain R-C coupled amplifier. The records are made by an ink writing galvanometer of 0.03 sec period. The magnification of seismograph is approximately 500 for a period of 30 sec, while its response covers periods from 1 to 50 sec. (cf. Fig. 5) The appearance of the pendulum is shown in Fig. 1. The free period of the pendulum is 1.5 seconds, and the mass is 200 gr. The boom is 10 cm. long, the weight of both booms is 15 gr., and they are balanced. Characteristics of the displacement transducer are shown in Fig. 2. It is a variable inductance type with high frequency oscillator (4 kc), and acts as a differential transformer (by a secondary winding connected for differential). The sensitivity of this transducer is about 1 v/1 mm when the source signal is supplied with 5 V. The output signal of the transducer is 4kc amplitude modulated wave. Fig. 3 shows characteristics of a pendulum of which period is lengthened by shunt capacitance. Fig. 4 is a diagram of electronic part of the system. Typical seismograms recorded at Tokyo by this seismograph and the Omori Displacement seismograph (lower trace) with constants T0 = 46 sec magnification = 16.5 are shown in Fig. 6. At every 15 mm minute marks are made by a crystal clock. | |||||
書誌情報 |
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo 巻 40, 号 4, p. 899-905, 発行日 1963-03-10 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00408972 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00162258 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
日本十進分類法 | ||||||
主題 | 453 | |||||
主題Scheme | NDC | |||||
出版者 | ||||||
出版者 | 東京大学地震研究所 | |||||
出版者別名 | ||||||
Earthquake Research Institute, University of Tokyo |