Title:
OPTICAL FIBERING INTERFERENCE SENSOR
Document Type and Number:
Japanese Patent JP2003344147
Kind Code:
A
Abstract:
To provide an optical fibering interference sensor capable of detecting the failure of facilities and devices constituting the optical fibering interference sensor.
Light receiving elements 11-13 receive light propagated through optical fibering 5. Amplifiers 17-19 amplify output signals of the light receiving elements 11-13. The output levels of the amplifiers 17-19 are monitored by circuits 21-23 for monitoring the levels of output signals. An error determining circuit 27 determines the failure on the basis of whether the signal levels detected by the circuits 21-23 for monitoring the levels of output signals lie within a predetermined range or not.
Inventors:
TOKURA TAKESHI
NIKAIDO SHINICHI
TAKASHIMA TORU
NIIMI SHINICHI
NIKAIDO SHINICHI
TAKASHIMA TORU
NIIMI SHINICHI
Application Number:
JP2002154455A
Publication Date:
December 03, 2003
Filing Date:
May 28, 2002
Export Citation:
Assignee:
FUJIKURA LTD
International Classes:
G01L9/00; G01D5/26; G01D5/353; G01H9/00; G01L11/02; (IPC1-7): G01H9/00; G01D5/26; G01L9/00; G01L11/02
Attorney, Agent or Firm:
Hidekazu Miyoshi (4 outside)
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