超声相控阵结构健康监测中通过计算差信号获取损伤散射信号的方法易受环境和结构变化的影响,针对这一问题,提出无参考信号的相控阵结构健康监测成像定位方法.采用窗函数截取散射信号,剔除直达波和边界反射信号.基于相控阵方法,对结构损伤状态时的传感器响应信号进行处理,无需结构健康状态时传感信号作为参考.该方法在碳纤维复合材料板结构上的实验研究证明,采用无参考信号的超声相控阵方法能够精确实时地监测并清晰表征结构损伤;同时,该方法可以大大缩短监测时间,且不受环境条件变化的影响,为该方法的工程化应用奠定基础.
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