Tension Monitoring Technology of Intelligent Cable Based on Fiber-Optic Grating

Xianzhong Xu; Zhiyuan Hu; Huaijian Zhou; Yutao Sun; Jianfeng Xu; Sha Cheng

doi:10.3788/LOP241406

Laser & Optoelectronics Progress, Volume. 62, Issue 5, 0506003(2025)

Tension Monitoring Technology of Intelligent Cable Based on Fiber-Optic Grating

Xianzhong Xu^1、*, Zhiyuan Hu¹, Huaijian Zhou¹, Yutao Sun¹, Jianfeng Xu², and Sha Cheng²

Author Affiliations

¹China Construction Fifth Engineering Bureau Co. Ltd., Changsha 410004, Hunan , China

²College of Civil Engineering, Guilin University of Technology, Guilin 541004, Guangxi , China

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Figures & Tables(12)

Fig. 1. Intelligent cable. (a) Schematic diagram; (b) object picture

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Fig. 2. Calibration experiment of intelligent cable. (a) Stretching bed; (b) control platform; (c) tension diagram; (d) data collection

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Fig. 3. Tension calibration results of three groups. (a) HS 13-measuring point 1; (b) HS 13-measuring point 2; (c) ZS 7-measuring point 1; (d) ZS 7-measuring point 2; (e) ZS 13-measuring point 1; (f) ZS 13-measuring point 2

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Fig. 4. Structure and measuring point layout diagram of Desheng Sports Center Natatorium

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Fig. 5. Flow chart of intelligent cable setting and cable net installation

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Fig. 6. Cloud map of cable force. (a) Stable cable under working condition 9; (b) Stable cable under working condition 14; (c) load-bearing cable under working condition 1; (d) load-bearing cable under working condition 14

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Fig. 7. Cable force values under different working conditions. (a) (d) Measurement 1; (b) (e) measurement 2; (c) (f) theoretical analysis

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Table 1. Calculation of correlation coefficient K of intelligent cable unit: kN·nm^-1
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Table 1. Calculation of correlation coefficient K of intelligent cable unit: kN·nm^-1
Cable number HS 13 ZS 7 ZS 13
Measuring point 1 150.376 387.597 370.370
Measuring point 2 145.773 353.357 350.877

Table 2. Corresponding working conditions of cable installation process

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Table 2. Corresponding working conditions of cable installation process

Mode	Construction process
Mode 1	All load-bearing cables are anchored in place
Mode 2	Stretching HS 1、HS 25
Mode 3	Stretching HS 2、HS 24
Mode 4	Stretching HS 3、HS 23
Mode 5	Stretching HS 4、HS 22
Mode 6	Stretching HS 5、HS 21
Mode 7	Stretching HS 6、HS 20
Mode 8	Stretching HS 7、HS 19
Mode 9	Stretching HS 8、HS 18
Mode 10	Stretching HS 9、HS 17
Mode 11	Stretching HS 10、HS 16
Mode 12	Stretching HS 11、HS 15
Mode 13	Stretching HS 12、HS 14
Mode 14	Stretching HS 13

Table 3. Cable force data record of HS 13 installation process

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Table 3. Cable force data record of HS 13 installation process

Jack /kN	Wavelength /nm	Increment /kN	Actual measurement /kN	Difference /%
—	0	0	41.441	—
115.101	0.453	68.120	109.459	4.9
231.253	1.237	154.135	295.195	－27.7
349.672	2.089	314.135	355.105	－1.6
465.826	2.753	413.985	454.805	2.4

Table 4. ZS data record table of working condition 8 installation process

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Table 4. ZS data record table of working condition 8 installation process

Number	Wavelength /nm			Coefficient K/（kN·nm^-1）	Cable force increment /kN
Number	Before stretching	After stretching	Difference	Coefficient K/（kN·nm^-1）	Cable force increment /kN
3	1532.097	1532.871	0.774	313.480	242.6
5	1539.479	1539.888	0.409	369.004	150.9
7	1531.741	1532.179	0.438	387.597	169.8
9	1540.337	1540.753	0.416	381.679	158.8
11	1530.929	1531.401	0.472	359.712	169.8
13	1539.165	1539.697	0.532	334.448	177.9

Table 5. Proportion of bending influence in the measured value

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Table 5. Proportion of bending influence in the measured value

Number	Cable force /kN	F₁ /kN	Proportion of F₁ /%
ZS 3	584.326	0.368	0.06
ZS 5	707.380	0.368	0.05
ZS 7	854.585	0.368	0.04
ZS 9	825.191	0.368	0.04
ZS 11	628.417	0.368	0.06
ZS 13	603.010	0.368	0.06
HS 7	186.763	0.565	0.30
HS 13	448.649	0.565	0.13
HS 19	365.557	0.565	0.15

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Xianzhong Xu, Zhiyuan Hu, Huaijian Zhou, Yutao Sun, Jianfeng Xu, Sha Cheng. Tension Monitoring Technology of Intelligent Cable Based on Fiber-Optic Grating[J]. Laser & Optoelectronics Progress, 2025, 62(5): 0506003

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