Research Article
Method Research of Coal Mine Roof Strain Detection Based on the Fiber Bragg Grating Sensor with Thermodynamic Couple Numerical Condition
Table 3
Data of FBG tensile strain test.
| Load times | Load | Fiber Bragg Grating strain detected/ | Load/ | Tension/ | FBG1 | FBG2 | FBG3 |
| 0 | 0 | 0 | 0 | 0 | 0 | 1 | 6.53 | 2.22 | 165 | 106 | 5 | 2 | 13.06 | 4.44 | 235 | 196 | 8 | 3 | 19.59 | 6.66 | 347 | 290 | 12 | 4 | 26.12 | 8.88 | 451 | 413 | 15 | 5 | 32.65 | 11.1 | 573 | 506 | 18 | 6 | 39.18 | 13.32 | 650 | 560 | 22 | 7 | 45.71 | 15.54 | 761 | 669 | 25 | 8 | 52.24 | 17.76 | 875 | 734 | 28 | 9 | 58.8 | 20 | 970 | 836 | 32 | 10 | 64.68 | 22 | 1082 | 951 | 37 | 11 | 70.56 | 24 | 1164 | 1070 | 41 | 12 | 76.44 | 26 | 1264 | 1206 | 44 |
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