关键词：传感器；现场试验；导波；电缆（绳）；技术评估
摘 要：The project was initiated by assembling a panel of experts from the wire rope industry and transportation sectors. The panel was consulted to develop and document a basic inspection specification for bridge suspender ropes and cables less than 3 inches in diameter. Using this specification, an initial laboratory testing plan was documented for single legged and double legged suspender rope which included length of rope, defect type, and location. Field testing of the technology was performed on the Manhattan Bridge suspender ropes. Of the five ropes tested, all of them contained cross-sectional area changes that were identified using guided wave ultrasound. On three of the ropes, it was possible to visually confirm the presence and location of each cross-sectional area change detected. On two of the ropes, it was impossible to visually confirm the presence of the cross-sectional area reduction due to access problems. The Manhattan Bridge suspender ropes were taken out of service and inspected visually to confirm the presence of cable defects. Also, during this reporting period, the feasibility of inspecting the main cable of a cable stay bridge was studied for the first time. From one sensor position, the technology scanned approximately 120 feet from a single sensor position. Ultrasonic data were acquired at 4 four different locations. A total of 4 Collar reflections were observed at every 20 feet. Between the collars, no significant reductions in cross-sectional area due to wire breaks or corrosion were observed. The study showed, for the first time, that main cables may also be inspected with the proposed technology.