To maintain a large number of bridges, efficient inspection methods are needed. We have developed a new and efficient method for inspecting reinforced concrete bridge decks by using acoustic emission (AE) monitoring. Notably, we use AE signals acquired during heavy rain, which have generally been considered to be noise in the past. Analysis of rain-induced AE signals reveals severe cracks deep inside a deck, which would have been difficult to recognize by conventional passive non-destructive testing. Our method is also quite efficient with measurements able to be completed in a very short period of time.

中文翻译：

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雨水引起的弹性波对钢筋混凝土桥梁桥面的破损有效检查

为了维护大量的桥梁，需要有效的检查方法。我们已经开发出一种通过使用声发射（AE）监控来检查钢筋混凝土桥面板的新型高效方法。值得注意的是，我们使用在大雨中采集的AE信号，过去通常将其视为噪声。雨水诱发的AE信号的分析表明，甲板内部深处存在严重裂缝，而传统的被动无损检测很难识别出裂缝。我们的方法效率很高，可以在很短的时间内完成测量。