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直視記録方式による長周期地震計 第2報
https://doi.org/10.15083/0000033765
https://doi.org/10.15083/00000337656dbb3d10-a4be-4d4a-882a-405c8df7bc53
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
ji0404018.pdf (682.7 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 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2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 | 10.15083/0000033765 | |||||
| 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 2. | |||||
| 著者 |
辻浦, 賢
× 辻浦, 賢 |
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| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 131812 | |||||
| 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 | In order to add long period seismographs to our radio tele-recording seismograph system we are developing a long period seismograph system as shown in Table 1. In this paper, we report on the long period seismograph designated as No. 2 in Table 1. The maximum magnification of the seismograph is approximately 1000 at the period of 30 sec. The response curve covers the period range 10 to 100 sec. The design of the pendulum is shown in Fig. 1. The brass boom is 45 cm long and the mass is 5000 .gr. The axis of rotation is obtained by a knife edge at the point (5) and a steel ribbon at the point (13) as shown in Fig. 1. The pendulum period is adjustable for a range of 10 to 65 sec with good stabilty. The transducer of the seismograph is a moving coil which has a winding of 100,000 turns with a mean diameter of 4.2cm and a resistance of 1 Megaohms. The magnet is made of MK-5 with pole pieces arranged to produce a radial magnetic field of 3500 .gauss. A shunt capacitance is used to lengthen the period of pendulum. The theory for the period lengthener was given by Coulomb (1952). The output of transducer is then put into an integrator with the time constant of 63 sec (2πRC). The function of this network is that of a double integrator having identical time constant. (See Fig. 2 and 3) The D. C. amplifier which is used to amplify the output of the integrator is the chopper type. Its amplification is 20 Volts per 100 micro-volts at the load resistance of 4 Kilo-ohms and the drift is less than ±20 micro-volts in 24 hours. The recorder is an ink-writing galvanometer with period of 0.03 sec and sensitivity of 5 mm per 1 m amp. The seismograph was constructed in February 1962, and has been operated at Yasuda Hall in the campus of Tokyo University. A typical record is shown in Fig. 8, where the upper traces 1 and 2 are the record of Press-Ewing seismograph (To = 30 sec. Tg = 90 sec 3) and the lower trace is that of our seismograph. | |||||
| 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. 907-916, 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Scheme | NDC | |||||
| 主題 | 453 | |||||
| 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 | ||||||
