Stay cable dynamic displacement monitoring method and system based on combined visual target

• Main Authors: WU ZHAN, SUN HEMING, MAO WEIQI, CHENG KANGNING, QIN GUANG, LI MING, TONG YIYANG, HUANG HUANZI, LIU YANG, JIANG WUYI, MEI XIAOTENG, WANG YAFEI, JIANG YUYIN, ZHONG JIWEI, LI CHENG, WANG LIANGBO, YANG YU, QIU YUN, CHEN RUI, XU ZHAOYUAN, LI RUICHANG
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2024
• Subjects: CALCULATING; COLORIMETRY; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; RADIATION PYROMETRY; TESTING

The invention relates to the technical field of bridge health monitoring, and discloses an inhaul cable dynamic displacement monitoring method and system based on a combined visual target, the combined visual target is arranged on an inhaul cable of a bridge, and the visual target comprises a retroreflection mark target and an infrared LED target; the method comprises the steps that whether ambient light is sufficient or not is evaluated, and when the ambient light is insufficient, images of a retroreflection mark target and an infrared LED target on the inhaul cable are obtained; evaluating the local imaging quality of the combined visual target to obtain imaging quality evaluation indexes of the retroreflection mark target and the infrared LED target; displacement calculation values of the retroreflection mark target and the infrared LED target are obtained; and fusing to obtain the displacement of the combined visual target, and taking the displacement as the displacement of the inhaul cable. When the ambi