A High Precision Fiber Bragg Grating Inclination Sensor for Slope Monitoring

Table 1

Materials and parameters of the FBG inclination sensor.

Name	Parameter	Material
Effective length of optical fiber l	20 mm	Quartz
Optical fiber (FBG) radius R	0.0625 mm
Optical fiber (FBG) elastic modulus E	70 Gpa
Pendulum volume	22×24×47 mm	Lead
Pendulum gravity G	2.8 N
The turning radius of the optical fiber r	5 mm
The turning radius of the pendulum r’	31.5 mm
FBG inclination sensor length	90 mm	Stainless steel
The theoretic sensitivity of the FBG inclination sensor S	400.4 pm/°