Title:
TEMPERATURE DISTRIBUTION MEASUREMENT DEVICE AND TEMPERATURE DISTRIBUTION MEASUREMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2013/024525
Kind Code:
A1
Abstract:
[Problem] To provide a temperature distribution measurement device and temperature distribution measurement method capable of readily configuring an appropriate transfer function in accordance with variation in the total length of an optical fiber. [Solution] A temperature distribution measurement device (20) comprises a laser light source (21) optically connected to an optical fiber (24), a photodetector (26) for detecting backscattered light inside the optical fiber (24), and a temperature distribution measurement unit (27) for making a corrective calculation using a transfer function for a provisional measured temperature distribution obtained from the output of the photodetector (26) to arrive at a true measured temperature distribution. The temperature distribution measurement unit (27) stores the transfer function data configured for each total length of the optical fiber (24) and each position in the lengthwise direction. The temperature distribution measurement unit (27) uses transfer function data to modify the transfer function employed in the corrective calculation when the length of the optical fiber (24) is modified.
Inventors:
KASAJIMA TAKEO (JP)
UNO KAZUSHI (JP)
ISHINABE MINORU (JP)
TADAKI KYOKO (JP)
TAKEI FUMIO (JP)
UNO KAZUSHI (JP)
ISHINABE MINORU (JP)
TADAKI KYOKO (JP)
TAKEI FUMIO (JP)
Application Number:
PCT/JP2011/068503
Publication Date:
February 21, 2013
Filing Date:
August 15, 2011
Export Citation:
Assignee:
FUJITSU LTD (JP)
KASAJIMA TAKEO (JP)
UNO KAZUSHI (JP)
ISHINABE MINORU (JP)
TADAKI KYOKO (JP)
TAKEI FUMIO (JP)
KASAJIMA TAKEO (JP)
UNO KAZUSHI (JP)
ISHINABE MINORU (JP)
TADAKI KYOKO (JP)
TAKEI FUMIO (JP)
International Classes:
G01K11/12
Domestic Patent References:
| WO2010125712A1 | 2010-11-04 |
Foreign References:
| JP2009265077A | 2009-11-12 | |||
| JP2010107279A | 2010-05-13 | |||
| JPH0450624A | 1992-02-19 | |||
| JPH03135743A | 1991-06-10 | |||
| JP2009265077A | 2009-11-12 | |||
| JP2010160081A | 2010-07-22 |
Other References:
See also references of EP 2746741A4
Attorney, Agent or Firm:
OKAMOTO, KEIZO (JP)
Keizo Okamoto (JP)
Keizo Okamoto (JP)
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