A
fiber Bragg
grating displacement sensor device includes a housing, a
fiber Bragg
grating, a
cam push rod mechanism, a clamping mechanism, a
temperature compensator, a concentric
pulley, an eccentric wheel, a cylindrical base, a deformable substrate, etc. The measuring probe extends into the housing and is tangent to the upper side of the
cam, and the other end can move freely. A large
pulley is provided on one side of the
cam, and an active
pulley is provided on the upper side of the pulley; a
transmission belt is provided between the active pulley and the passive pulley, and the passive pulley is embedded in the straight groove of the clamping mechanism; the other side of the straight groove slide bar of the clamping mechanism is embedded with the eccentric wheel, and the eccentric wheel is fixed on the base to drive the eccentric wheel to rotate. A thin
rope is connected to the outer side of the eccentric wheel and connected to the slider; the slider is placed on the sensing substrate, and four
fiber Bragg gratings with different directions are built in the sensing substrate. The present invention uses
fiber Bragg grating for displacement measurement, has good durability and is not affected by electromagnetic fields. It is equipped with a
temperature compensator, which can fundamentally eliminate the interference of temperature on the
fiber Bragg grating sensor, avoid the
fiber Bragg grating displacement sensor from contacting with external corrosive substances, and can adapt to harsh environments.