Fang Zhao, Yongbo Yang, Yu Zou, Shaoping Liu, Jinfeng He. Vertical Deformation Monitoring Method Based on Monocular Vision and Near-Infrared Targets[J]. Laser & Optoelectronics Progress, 2024, 61(18): 1812007
- Laser & Optoelectronics Progress
- Vol. 61, Issue 18, 1812007 (2024)
Fig. 1. Layout diagram of deformation monitoring system
Fig. 2. Flow chart of vertical deformation calculation method
Fig. 3. Light spot center image of near-infrared target
Fig. 4. Schematic diagram of camera image coordinates
Fig. 5. Schematic diagram of camera imaging geometry relationship
Fig. 6. Precision testing device. (a) Layout of monocular vision measurement system; (b) layout of altimeter and targets
Fig. 7. Accuracy test data curve
Fig. 8. A certain rail transit bridge
Fig. 9. Installation diagram of bridge deformation monitoring on site. (a) Monocular vision measurement system at bridge pier; (b) near-infrared target light at bridge mid span; (c) near-infrared target light at bridge pier
Fig. 10. Monitoring curve of bridge deformation on a certain day
Fig. 11. Monitoring data during the time period of 5:30‒6:30
Fig. 12. Monitoring data during the time period of 18:30‒19:30
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Table 1. Accuracy test results
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