Digital demodulator unit of laser vibrometer standard for in situ measurement

Authors

  • Akihiro Oota AIST
  • Hideaki Nozato AIST
  • Wataru Kokuyama AIST
  • Yoshinori Kobayashi Neoark Corporation
  • Osamu Takano Neoark Corporation
  • Naoki Kasai Neoark Corporation

DOI:

https://doi.org/10.21014/acta_imeko.v2i2.116

Abstract

To establish an easy-to-use traceability system for laser vibrometers in vibration acceleration standard, a highly accurate reference standard is required. In this study, we investigated the measurement reliability of a commercial laser vibrometer with an analog demodulator. The results confirmed a large measurement deviation from nominal sensitivity values due to characteristics of the analog demodulator. To reduce such deviation, a high-accuracy digital demodulator, which can be utilized as a reference standard, was developed. The experimental results confirmed the improved measurement accuracy of the developed digital demodulator.

Author Biography

Akihiro Oota, AIST

Section Chief of vibration and hardness section, acoustics and vibration metrology division, NMIJ AIST.
ACTA IMEKO Vol 2 No 2 (2013)

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Published

2014-01-15

Issue

Vol. 2 No. 2 (2013)

Section

Research Papers

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