Department of Music Technology & Acoustics, Hellenic Mediterranean University, 741 33 Rethymno, Greece.
Department of Electronics, Hellenic Mediterranean University, 731 33 Chania, Greece.
Sensors (Basel). 2024 May 12;24(10):3074. doi: 10.3390/s24103074.
In previous research, we presented an apparatus designed for comprehensive and systematic surveillance of trees against borers. This apparatus entailed the insertion of an uncoated waveguide into the tree trunk, enabling the transmission of micro-vibrations generated by moving or digging larvae to a piezoelectric probe. Subsequent recordings were then transmitted at predetermined intervals to a server, where analysis was conducted manually to assess the infestation status of the tree. However, this method is hampered by significant limitations when scaling to monitor thousands of trees across extensive spatial domains. In this study, we address this challenge by integrating signal processing techniques capable of distinguishing vibrations attributable to borers from those originating externally to the tree. Our primary innovation involves quantifying the impulses resulting from the fracturing of wood fibers due to borer activity. The device employs criteria such as impulse duration and a strategy of waiting for periods of relative quietness before commencing the counting of impulses. Additionally, we provide an annotated large-scale database comprising laboratory and field vibrational recordings, which will facilitate further advancements in this research domain.
在之前的研究中，我们提出了一种用于全面系统监测树木蛀虫的仪器。该仪器包括将未涂层的波导插入树干，从而将移动或挖掘幼虫产生的微振动传输到压电探头。随后，以预定的时间间隔将后续的记录传输到服务器，在服务器上手动进行分析，以评估树木的虫害状况。然而，当需要监测广泛空间范围内的数千棵树木时，这种方法受到了很大的限制。在本研究中，我们通过整合能够区分蛀虫引起的振动和树木外部引起的振动的信号处理技术来解决这一挑战。我们的主要创新在于量化由于蛀虫活动导致的木材纤维断裂产生的脉冲。该设备采用了诸如脉冲持续时间和等待相对安静时间段后再开始计数脉冲的策略等标准。此外，我们还提供了一个带注释的大规模数据库，其中包含实验室和野外振动记录，这将有助于推动该研究领域的进一步发展。
