WEKO3
アイテム
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In that spectrum, long period waves, which have the periods of about 5 to 90 minutes, have been investigated with regard to destructive tsunamis and storm surges, but in recent years small tsunamis caused by earthquakes of small magnitude or long period fluctuations of the sea level caused by meteorological disturbances are being studied. Because the energy of these long period waves is very small in comparison with gravity waves or tides, a specially designed instrument with a band pass filter is necessary for the observation of such waves. The writer illustrates long period wave recorders which are provided with a hydraulic filter and a pressure transducer under water. First of all, the characteristic of the hydraulic filter was investigated by means of the equivalent electric circuits, and the ERI-III type and the ERI-IV type tsunami recorders were designed. The ERI-IV type tsunami recorder is provided with the hydraulic filter which is represented by equivalent circuits shown in Fig. 3 (4), and the schematic diagram of the instrument is shown in Fig. 6, where the two stand pipes act as capacities and the two capillary tubes shown by marks Ru R2, act as resistances. The calibration of this instrument was carried out by means of the application of the water pressure of step function type, and the spectral response curve obtained by this calibration is shown in Fig. 11. This instrument was installed at the Izu-Oshima tsunami observatory of the Earthquake Research Institute in 1960, and now is in continuous operation with a satisfactory performance. The filter similar to the above stated may be applied to other instruments, for example, to the portable long wave recorder (Fig. 15), or the microbarograph (Fig. 16), etc.. As another application of this filtering system, a filtering device was constructed to make easy inspection of a record by attenuating the longer and the shorter period components of waves and taking out a particular period band. This device is schematicaly shown in Fig. 17. For example, if a tsunami record observed by a tide gauge is put on this device, it will be translated into a simple record, because the tide of long period and the short period waves such as seiches of a bay where the tide gauge station is located, will be attenuated in their amplitudes. These practical examples are shown in Figs. 18, 19, 20.", "subitem_description_type": "Abstract"}]}, "item_4_full_name_3": {"attribute_name": "著者別名", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "131838", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Aida, Isamu"}]}]}, "item_4_identifier_registration": {"attribute_name": "ID登録", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.15083/0000033775", "subitem_identifier_reg_type": "JaLC"}]}, "item_4_publisher_20": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "東京大学地震研究所"}]}, "item_4_source_id_10": {"attribute_name": "書誌レコードID", "attribute_value_mlt": [{"subitem_source_identifier": "AN00162258", "subitem_source_identifier_type": "NCID"}]}, "item_4_source_id_8": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "00408972", "subitem_source_identifier_type": "ISSN"}]}, "item_4_subject_15": {"attribute_name": "日本十進分類法", "attribute_value_mlt": [{"subitem_subject": "453", "subitem_subject_scheme": "NDC"}]}, "item_4_text_21": {"attribute_name": "出版者別名", "attribute_value_mlt": [{"subitem_text_value": "Earthquake Research Institute, University of Tokyo"}]}, "item_4_text_34": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"subitem_text_value": "Departmental Bulletin Paper"}]}, "item_4_text_4": {"attribute_name": "著者所属", "attribute_value_mlt": [{"subitem_text_value": "地震研究所"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "相田, 勇"}], "nameIdentifiers": [{"nameIdentifier": "131837", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2017-06-27"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "ji0403009.pdf", "filesize": [{"value": "1.3 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 1300000.0, "url": {"label": "ji0403009.pdf", "url": "https://repository.dl.itc.u-tokyo.ac.jp/record/33775/files/ji0403009.pdf"}, "version_id": "7afb2788-6c6f-4f86-b8d8-2c535ee20707"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "departmental bulletin paper", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "長周期波記録計の製作", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "長周期波記録計の製作", "subitem_title_language": "ja"}]}, "item_type_id": "4", "owner": "1", "path": ["4981", "4982"], "permalink_uri": "https://doi.org/10.15083/0000033775", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2008-05-30"}, "publish_date": "2008-05-30", "publish_status": "0", "recid": "33775", "relation": {}, "relation_version_is_last": true, "title": ["長周期波記録計の製作"], "weko_shared_id": -1}
長周期波記録計の製作
https://doi.org/10.15083/0000033775
https://doi.org/10.15083/0000033775325d7ab2-2a0e-4ae1-b57e-374920108c80
名前 / ファイル | ライセンス | アクション |
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ji0403009.pdf (1.3 MB)
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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 | 長周期波記録計の製作 | |||||
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 | 10.15083/0000033775 | |||||
ID登録タイプ | JaLC | |||||
その他のタイトル | ||||||
その他のタイトル | Design and Construction of Long-period Wave Recorders | |||||
著者 |
相田, 勇
× 相田, 勇 |
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著者別名 | ||||||
識別子 | 131838 | |||||
識別子Scheme | WEKO | |||||
姓名 | Aida, Isamu | |||||
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 | It is well known that the spectrum of ocean waves has a wide range of periods from capillary waves to tides. In that spectrum, long period waves, which have the periods of about 5 to 90 minutes, have been investigated with regard to destructive tsunamis and storm surges, but in recent years small tsunamis caused by earthquakes of small magnitude or long period fluctuations of the sea level caused by meteorological disturbances are being studied. Because the energy of these long period waves is very small in comparison with gravity waves or tides, a specially designed instrument with a band pass filter is necessary for the observation of such waves. The writer illustrates long period wave recorders which are provided with a hydraulic filter and a pressure transducer under water. First of all, the characteristic of the hydraulic filter was investigated by means of the equivalent electric circuits, and the ERI-III type and the ERI-IV type tsunami recorders were designed. The ERI-IV type tsunami recorder is provided with the hydraulic filter which is represented by equivalent circuits shown in Fig. 3 (4), and the schematic diagram of the instrument is shown in Fig. 6, where the two stand pipes act as capacities and the two capillary tubes shown by marks Ru R2, act as resistances. The calibration of this instrument was carried out by means of the application of the water pressure of step function type, and the spectral response curve obtained by this calibration is shown in Fig. 11. This instrument was installed at the Izu-Oshima tsunami observatory of the Earthquake Research Institute in 1960, and now is in continuous operation with a satisfactory performance. The filter similar to the above stated may be applied to other instruments, for example, to the portable long wave recorder (Fig. 15), or the microbarograph (Fig. 16), etc.. As another application of this filtering system, a filtering device was constructed to make easy inspection of a record by attenuating the longer and the shorter period components of waves and taking out a particular period band. This device is schematicaly shown in Fig. 17. For example, if a tsunami record observed by a tide gauge is put on this device, it will be translated into a simple record, because the tide of long period and the short period waves such as seiches of a bay where the tide gauge station is located, will be attenuated in their amplitudes. These practical examples are shown in Figs. 18, 19, 20. | |||||
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 3, p. 545-560, 発行日 1962-11-30 |
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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 |