Title:
SIGNAL CALIBRATION DEVICE, SIGNAL CALIBRATION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2022/130917
Kind Code:
A1
Abstract:
This signal calibration device 1 comprises a signal acquisition unit 10 for acquiring an output signal, a time window segmenting unit 12 for segmenting the output signal using a plurality of time windows, a window function multiplication unit 14 for multiplying the output signal of each time window by a window function, a discrete Fourier transform calculation unit 16 for carrying out a discrete Fourier transform on the products of the window function and the output signals of the time windows, a calibration unit 18 for calibrating each frequency in the frequency domain, an all-frequency-waveform calculation unit 20 for calculating the waveforms of each frequency, a window function deviation estimation unit 22 for estimating the deviation of the window function using a transfer function for the signal acquisition unit, a deviation window function division unit 24 for dividing the waveforms of each frequency by a window function including the deviation, an all-frequency-waveform addition unit 26 for adding the waveforms of each frequency across all the frequencies, and a time window linking unit 28 for linking the calibrated data for each of the time windows across all the time windows.
Inventors:
KITAHARA MASAHIRO (JP)
MIYOSHI YOSHIZUMI (JP)
MIYOSHI YOSHIZUMI (JP)
Application Number:
PCT/JP2021/042911
Publication Date:
June 23, 2022
Filing Date:
November 24, 2021
Export Citation:
Assignee:
NATIONAL UNIV CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEM (JP)
International Classes:
G01R13/20; G01R23/16
Domestic Patent References:
| WO2007099971A1 | 2007-09-07 | |||
| WO2014136628A1 | 2014-09-12 |
Foreign References:
| JP2017513052A | 2017-05-25 |
Other References:
ROBERT P., CORNILLEAU-WEHRLIN N., PIBERNE R., DE CONCHY Y., LACOMBE C., BOUZID V., GRISON B., ALISON D., CANU P.: "CLUSTER–STAFF search coil magnetometer calibration – comparisons with FGM", GEOSCIENTIFIC INSTRUMENTATION, METHODS AND DATA SYSTEMS, vol. 3, no. 2, 1 January 2014 (2014-01-01), pages 153 - 177, XP055944373, DOI: 10.5194/gi-3-153-2014
Attorney, Agent or Firm:
MORISHITA Sakaki (JP)
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