To provide a distributed water pressure sensor capable of more accurately measuring distortion and reducing cost by commonly using one optical fiber for water pressure measuring and for temperature compensating.
A distributed water pressure sensor is provided with a tubular body having a groove capable of installing optical fibers continuously or intermittently along the longitudinal direction and the optical fibers stranded at the outer periphery of the tubular body. The stranded parts where the optical fibers are stranded at the outer periphery of the tubular body and the linear parts where the optical fibers are installed in the tubular body are arranged alternately along the longitudinal direction of the tubular body. The folding part is set at the tip side of the stranded part to fold and introduce the tip side of the stranded part or the linear part of the optical fibers to inside of the tubular body, and the temperature compensating part is formed with linearly installing the optical fibers, which run from the folding part to the distal end side of the tubular body, inside the tubular body.
SAYAMA TADAYOSHI
SHIMOMICHI TAKESHI
NEUBREX CO LTD
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama