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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/5374

    Title: 台灣現行測震儀器之特性檢測研究;A study of the characteristics of contemporary seismometers in Taiwan
    Authors: 林慶仁;Ching-Ren Lin
    Contributors: 地球物理研究所
    Keywords: 感震器;記錄器;振幅;頻率響應;頻寬;sensor;recorder;amplitude;frequency response;bandwith
    Date: 2000-07-14
    Issue Date: 2009-09-22 09:52:47 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 本研究主要是探討地震儀器的特性檢測方法,由儀器的結構及組成原理來深入研究可動線圈速度式感震器、力平衡加速度感震器和數位式資料收錄裝置(或稱記錄器)各種特性規格的涵意,設計一些檢測的方法來加以檢測,並利用天然震波來驗證感震器的振幅、頻率響應和極向等特性是否與檢測的結果相同,以實驗實例證明這些規格特性能幫助使用者更加瞭解儀器的性能,在進行各種觀測實驗時選用適當的儀器和參數設定能發揮儀器的最大效能。 經由本研究讓我們理解到,了解儀器規格特性所代表的意義,才能充分掌握儀器的性能,進而發揮儀器的最大效能。而同樣一組儀器,適當的記錄參數設定可以導致好的效果,反之,因記錄器某一頻帶(尤其高頻部分)被壓抑會產生不正確的結果。根據頻寬(bandwidth)的定義:在高低半功率點之間的頻率差值,亦即在低頻輸出達到最大電壓增益70%(-3dB)為起點到高頻輸出電壓下降到最大電壓增益70%點的頻率段。所以儀器公司所提供儀器的頻寬規格,最大誤差可能高達30%,在觀測實驗當中要想得到較精確的結果,使用儀器前最好要先經過測試以精確決定頻寬範圍。本文所應用之各種檢測儀器特性的方法,其測試所獲得的結果與利用天然震波測試的結果大致相同,顯示這些檢測方法有一定的可靠性,可幫助使用者更加了解儀器的性能。 The objective of this study was to comprehend the characteristics and their applications of seismometers, velocity sensor, force balance accelerometer, and digital data recorder, through a variety of designed methods based on the fully understanding of the principle and configuration of instruments. Nature waves were used to verify the amplitude, frequency response and polarity of the sensors and compare those results with that of designed methods. This study has proved that better understanding of characteristics of seismometers before use can enhance on the accuracy of observation results dramatically. Due to the limitations of instruments, the better characteristics understanding before operation, the better observation results after use. Thus, a proper parameter assignation can result in a better observation and verifying the characteristics of instruments through various tests before use can also improve the accuracy of the operation. It is always beneficial for users to verify the bandwith before use through designed methods due to nature of the instrument error can up to 30%. The results obtained from the designed methods bear high degree coherence with those from nature waves. This manifests the feasibility of the designed methods of this study.
    Appears in Collections:[地球物理研究所] 博碩士論文

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