Simple Magnetic Tape Recorder of Vibration

DOI

Bibliographic Information

Other Title
  • 振動の磁気テープ記録器の試作

Abstract

A simple vibration recorder is developed to analyze the vibrations produced by the micro-tremour of the earth or building. Its covering frequency ranges 1-30c/s. A magnetic tape recording method is adopted instead of a smoked paper recording method, for the latter is not appropriate to process the recorded data. As the frequency characteristic of an ordinary magnetic tape recorder is very poor in the range of these vibrations, the pulse width modulation system is used to record and play back the vibrations. The fundamental pulse frequency is 500c/s, and the wow and flutter due to the recording and play-back mechanism offer no problem in practical use. Some improvements have been made in the wave shaping circuits.

Journal

Details 詳細情報について

  • CRID
    1390282680097750912
  • NII Article ID
    130003935190
  • DOI
    10.11499/sicejl1951.10.356
  • ISSN
    18838154
    04500024
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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