On the ocean wave recorder and wave analyser.
In this paper, an Ocean Wave Recorder developed by the Japan Hydrographic Department is described. The instrument is essentially a Froude’s type wave pole, combined with a step resistance wave recorder, and is designed for the purpose of measuring large oceanic waves on the high sea. The seawater forms a part of electric circuit and the change of water level corresponds linearly to that of the electric current intensity. The latter is converted into the frequency change of 1.0-2.0 kHz and recorded on a magnetic tape in the instrument. It is also possible to monitor the operation on board a ship by means of cable. Furthermore, a wave analyser for processing the data by the instrument has been also developed. This wave analyser computes automatically the H-mean, H-1/3 and H-1/10 from the magnetic tape. Field observations using this instrument has been carried out several times and the results are satisfactory for the most part.
| Main Authors: | , |
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| Format: | Journal Contribution biblioteca |
| Language: | Japanese |
| Published: |
1973
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| Online Access: | http://hdl.handle.net/1834/16348 |
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