Title:
SIGNAL PROCESSING DEVICE AND LASER MEASUREMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/115150
Kind Code:
A1
Abstract:
A signal processing device and a laser measurement device, having: an A/D converter that converts a light reception signal to digital data; a DFT calculation unit that obtains a one-frame portion of the digital data for the light reception signal converted by the A/D converter, discrete Fourier transforms the obtained one-frame portion of digital data using a specified frequency, which is a modulation frequency multiplied by an integer, and frequencies having the specified frequency as the center frequency and differing by an integral multiple of the step frequency, and calculates a DFT component using the specified frequency and frequencies having the specified frequency as the center frequency and differing by an integral multiple of the step frequency; a convolutional calculation unit that performs convolutional calculation on the DFT component calculated by the DFT calculation unit; and an inverse DFT calculation unit that performs inverse discrete Fourier transformation of the result calculated by the convolutional calculation unit, and generates a spectroscopic signal.
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Inventors:
KONDOU AKIO
KOBAYASHI YASUYUKI
TAKAKUWA YOSHINAO
SHIGEKI KENJI
KOBAYASHI YASUYUKI
TAKAKUWA YOSHINAO
SHIGEKI KENJI
Application Number:
PCT/JP2012/054277
Publication Date:
August 30, 2012
Filing Date:
February 22, 2012
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
LOARANT CORP (JP)
KONDOU AKIO
KOBAYASHI YASUYUKI
TAKAKUWA YOSHINAO
SHIGEKI KENJI
LOARANT CORP (JP)
KONDOU AKIO
KOBAYASHI YASUYUKI
TAKAKUWA YOSHINAO
SHIGEKI KENJI
International Classes:
G01N21/39
Foreign References:
| JP2010169449A | 2010-08-05 | |||
| JP2010169487A | 2010-08-05 | |||
| JP2005502895A | 2005-01-27 | |||
| JP2007127425A | 2007-05-24 |
Attorney, Agent or Firm:
SAKAI, Hiroaki et al. (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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Claims: