The simplified diagram in the pressure When the is shown in

Force diagram of simplified model of flat diaphragm.In Figure 11, L would be the distance amongst fixed fiber columns, and R is the radius of elastic diaphragm. It's recognized that the distance involving the fixed columns L = 40 mm, the height from the fixed column m = 10 mm, as well as the radius on the diaphragm is R = 120 mm. As shown in Figure 11, concave deformation on the compressed diaphragm occurs just after Figure 11. Force diagram of simplified model of flat diaphragm.the diaphragm at the fixed column is compression, and then the deformation deflection of = ( R - L). R two Via calculation, the strain variable in the grating is shown in Equation (7). = 2mSin(tan-1 LR).(7)As a result, the sensor sensitivity could be obtained as (eight): k= three(1 - Pe)mR3 1 - . 8Eh3 L (eight)The elastic modulus of 304 stainless steel E = 1.942 GPa, Poisson's ratio = 0.28, sensor radius R = 120 mm, height h = 50 mm, fixed column height m = 10 mm, distance amongst fixed columns L = 40 mm, effective optical fiber elasto-optic coefficient Pe = 0.21 and other relevant values, substituted into Equation (eight) and may get the answer: k = 42.544 pm/Mpa. 4. Experimental Calibration Final results and Evaluation four.1. Pressure Calibration The sensor should be calibrated ahead of use. As a way to lessen the influence of temperature on the transform of grating center wavelength as considerably as you can, the oil stress calibration experiment was carried out inside the continual temperature laboratory of stress Research Institute of Shanxi Institute of Metrology. Within the experiment, the FBG stress sensor made and manufactured is loaded in to the BHY-160B Piston manometer through4. Experimental Calibration Results and Evaluation 4.1. Pressure CalibrationSymmetry 2021, 13,The sensor must be calibrated just before use. So as to reduce the influence of temperature on the change of grating center wavelength as substantially as you possibly can, the oil stress 13 of 20 calibration experiment was carried out within the continual temperature laboratory of pressure Analysis Institute of Shanxi Institute of Metrology. Inside the experiment, the FBG pressure sensor created and manufactured is loaded in to the BHY-160B Piston maa specific fixture, andspecial fixture, after which the sensor is FBG deAlue 0.05 by the Whitney U test. AOH = alternariol; AME = alternariol monomethyl modulator (SM125denometer by means of a then the sensor is connected with all the connected together with the FBG of MOI) and laptop, as shown incomputer, as shown in Figure 12. modulator (SM125 of MOI) and Figure 12.Figure 12. Oil pressure calibration experiment diagram. Figure 12. Oil pressure calibration experiment diagram.The adjust on the central wavelength of your grating inside the method of stress and the adjust with the central wavelength in the grating within the course of action of pressure and depressurization was observed by personal computer. The experiment adopts step-by-step presdepressurization was observed by laptop or computer. The experiment adopts step-by-step pressurization, starting from 1 MPa, every single time the pressurization range is 1 MPa, after which surization, beginning from 1 MPa, each and every time the pressurization variety is 1 MPa, after which progressively enhanced to 50 MPa.The simplified diagram of the stress When the is shown in is subjected diaphragm is shown in Figure 11.Figure 11.