Torsion and displacement measuring sensor based on optical fiber acousto-optic modulation
A technology of displacement sensors and acousto-optic modulators, which is applied in measuring devices, instruments, and optical devices, etc., can solve the problems of complex and slow processing methods of spectral measurement receivers, difficulty in achieving high-speed dynamic monitoring, and unsuitable for reducing sensor costs. , to achieve the effect of being easy to be built, insensitive to temperature and axial stress, and strong in anti-cross-sensitivity
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[0017] The preferred mode of the present invention will be described in further detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, but not used to limit the present invention.
[0018] A sensor for measuring torsion and displacement based on optical fiber acousto-optic modulation (see figure 1 ) Including laser 1, single-mode fiber 2, two-mode fiber 3, piezoelectric ceramic acousto-optic modulator 4, wires 5 and 13, microwave signal generator 6, object to be measured 7, two-mode fiber end 8, zoom collimator lens 9. Transmission beam 10, CCD camera 11, and data processor 12; the laser 1 is directly connected to the single-mode fiber 2, the single-mode fiber 2 is directly connected to the second-mode fiber 3, and the second-mode fiber 3 is closely attached to the piezoelectric ceramic acoustic On the light modulator 4, the piezoelectric ceramic acousto-optic...
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