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利用波束成形或L形传感器簇方法对板类结构上的损伤进行定位时存在盲区。本文结合波束成形与L形传感器簇定位方法，通过将五个传感器排列成扇形的方式，提出了一种扇形传感器簇损伤定位方法，可以有效减少损伤定位盲区。使用两组扇形传感器簇以及一个用于发射激励信号的传感器即可准确检测出板中损伤的位置。通过仿真和实验验证了扇形传感器簇损伤定位方法的可行性，并与采用T形传感器簇时的预测结果进行了比较，结果表明扇形传感器簇损伤定位方法可以更准确地识别不同位置的损伤。仿真和实验结果表明，扇形传感器簇损伤定位方法可以减少损伤定位盲区，提高损伤定位的精度。Plate structures are widely applied in large-scale engineering fields such as aerospace, hull manufacturing, and construction. However, the plate structure is easily damaged during long-term service or when it is impacted by foreign objects. Such damage may lead to serious safety accidents.
Beamforming and L-shaped sensor cluster (LSSC) localization method can be used to locate the damage on the plate, when using beamforming or LSSC localization method to locate damages on plate-like structures, there exist blind area.
In this paper, by combining the beamforming and LSSC localization method, a fan-shaped sensor cluster localization method is proposed through arranging five sensors in a fan shape, which can effectively reduce the blind area. The positions of damages in the plate can be accurately detected by using two groups of fan-shaped sensor clusters and one sensor for transmitting the excitation signal. The feasibility of the fan-shaped sensor cluster localization method is verified through numerical simulations and experiments, and the results are compared with those obtained when using the T-shaped sensor cluster. The results show that the fan-shaped sensor cluster positioning method can more accurately identify damages at different positions. Both simulation and experimental results indicate that the fan-shaped sensor cluster localization method can reduce the blind area and improve the accuracy of damage location. -
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