IMPROVEMENT OF VERY LOW-FREQUENCY PRIMARY VIBRATION CALIBRATION SYSTEM AT NMIJ/AIST |
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| W. Kokuyama, T. Ishigami, H. Nozato, A. Ota |
- Abstract:
- The very low-frequency primary vibration calibration system at NMIJ/AIST was improved with a new signal processing framework. It contains commercial hard disk drive so that photoelectric signals from homodyne interferometer can be recorded. Sine-approximation method with a digital band-pass filter is applied to boost signal-to-noise ratio. By calibrating a reference accelerometer, compatibility with the existing primary vibration calibration system was confirmed.
- Keywords:
- very low frequency, primary vibration calibration, band-pass filter, sine approximation method
- Download:
- IMEKO-WC-2015-TC22-431.pdf
- DOI:
- -
- Event details
- Event name:
- XXI IMEKO World Congress
- Title:
Measurement in Research and Industry
- Place:
- Prague, CZECH REPUBLIC
- Time:
- 30 August 2015 - 04 September 2015