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The influence of various external factors on the proposed M-DAVIM visual measurement method is systematically investigated through laboratory tests and field monitoring. After identifying common environmental and operational influencing factors, a series of periodic vibration experiments is conducted under controlled conditions to analyze the effects of illumination intensity, fog concentration, camera elevation angle, target size, and camera vibration. A laser displacement sensor is employed as a reference to quantitatively evaluate measurement errors induced by these factors. Furthermore, the visual monitoring system is deployed at a high formwork construction site in Ningbo, enabling real-time tracking and displacement monitoring of critical structural nodes. The results demonstrate that under optimal lighting conditions (200–400 lx) and with target marker sizes exceeding 18 pixels, the M-DAVIM method achieves sub-millimeter measurement accuracy and maintains high precision and strong robustness under adverse conditions such as fog and vibration. Field monitoring results from May 27, 2023, show that all monitored indicators remain below the code-specified alarm thresholds, indicating structural safety. Nevertheless, due to continuous changes in structural conditions caused by factors such as component aging and load variation, there remains a need for scientific and adaptive methods to determine and dynamically update monitoring and warning thresholds.

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Real-Time Displacement Monitoring of High Formwork Support Structures Based on Computer Vision

  • 章节

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

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  • Qiang Li,
  • Peixuan Wang,
  • Bawar Iftikhar,
  • Yan Jiang,
  • Mingfeng Huang

摘要

The influence of various external factors on the proposed M-DAVIM visual measurement method is systematically investigated through laboratory tests and field monitoring. After identifying common environmental and operational influencing factors, a series of periodic vibration experiments is conducted under controlled conditions to analyze the effects of illumination intensity, fog concentration, camera elevation angle, target size, and camera vibration. A laser displacement sensor is employed as a reference to quantitatively evaluate measurement errors induced by these factors. Furthermore, the visual monitoring system is deployed at a high formwork construction site in Ningbo, enabling real-time tracking and displacement monitoring of critical structural nodes. The results demonstrate that under optimal lighting conditions (200–400 lx) and with target marker sizes exceeding 18 pixels, the M-DAVIM method achieves sub-millimeter measurement accuracy and maintains high precision and strong robustness under adverse conditions such as fog and vibration. Field monitoring results from May 27, 2023, show that all monitored indicators remain below the code-specified alarm thresholds, indicating structural safety. Nevertheless, due to continuous changes in structural conditions caused by factors such as component aging and load variation, there remains a need for scientific and adaptive methods to determine and dynamically update monitoring and warning thresholds.