| 波谱分析仪 |
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| 引用本文： | 何鹤方.波谱分析仪[J].地球物理学报,1954,3(2):103-111. |
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| 作者姓名： | 何鹤方 |
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| 作者单位： | 中国科学院地球物理研究所 |
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| 摘 要： | 在地球物理學中,我們常常遇到這樣的問題:如何從在一定的觀測時間內所觀测得到的數據中,找出在所觀測的對象中潛伏着的週期性。众所周知,我們可以利用諧波分析及自相關方法（autocorrelation method）的數字計算以達到這個目的。但是,這樣做是頗為繁冗的。這里我們將要介紹一種波譜分析儀,用電子學
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| 关 键 词： | 频放大器 地球物理研究 波谱分析 波形 波分析 频率 谱分析仪 整流器 振幅 正弦波 |
| 收稿时间： | 1954-08-20 |
AN ELECTRIC WAVE-ANALYZER |
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| Ho Ho-Fang.AN ELECTRIC WAVE-ANALYZER[J].Chinese Journal of Geophysics,1954,3(2):103-111. |
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| Authors: | Ho Ho-Fang |
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| Abstract: | The present paper describes an electric wave analyzer which may be used to find out the hidden periodicities of a set of geophysical data. The rec rd of observational data, after being converted to a form of black and white "variable area", is wrapped around a rotating drum. The wave form on the record is picked by a photo-tube, the output of which is selectively amplified at a particular frequency, rectified and sent to a cathode ray tube. As the drum is made to rotate at a certain speed and let die down freely, the cathode ray trace is displaced by a slow time base at the same time. The photographic record of the display shows the periodogram of the observational data directly. The results of analyses of several records of known periods are given and the resolving power of the instrument is discussed. |
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