Distributed continuous high-accuracy bidirectional displacement fiber-optic measurement system and measurement method thereof

A distributed continuous high-accuracy bidirectional displacement fiber-optic measurement system for measuring the displacement of a measurement target, comprising:

• a Brillouin analysis device, the Brillouin analysis device being connected with an optical fiber strain gauge, the optical fiber strain gauge being arranged in the measurement target, the Brillouin analysis device being operable to analyze a displacement of each interval of the optical fiber strain gauge to generate continuous data;
• a fiber-optic sensor assembly, the fiber-optic sensor assembly comprising:
• a reference fiber-optic sensor device, the reference fiber-optic sensor device being arranged in the measurement target, and
• a plurality of fiber-optic sensor devices, the fiber-optic sensor devices being arranged in the measurement target, the fiber-optic sensor devices being arranged in a same axial direction as the reference fiber-optic sensor device, the fiber-optic sensor devices being operable to individually measure a displacement with respect to the reference fiber-optic sensor device to generate single-spot data;
• and
• an operation module, the operation module being connected with the Brillouin analysis device and the fiber-optic sensor assembly, the operation module being operable to receive the continuous data and the single-spot data transmitted from the Brillouin analysis device and the fiber-optic sensor devices, and to calculate an accurate displacement for each interval of the optical fiber strain gauge according to the continuous data and the single-spot data so as to form continuous displacement data.