Vibration mechanical energy may be highly destructive in many scenarios, such as bridges, pipelines, precision instruments and subways. These energies may convert into electrical power to apply not only to power the wireless sensor nodes but also to serve to protect vibrating objects. However, in pipelines complex vibration environments, the mechanical energy harvesting from a single direction is insufficient. In this study, a sandwiched electromagnetic energy harvester is designed with an alternating north- and south-orientation magnet array to convert both horizontal and vertical vibration mechanical energy into electrical power. Experimental results have shown that the device is capable of collecting vibration energy from both horizontal and vertical directions, and the collection of vibration energy from both directions can be performed simultaneously. This innovative energy harvester has the potential to convert pipeline vibration energy from multiple directions into electricity, which can both protect the pipelines and self-power to the detection of pipeline working conditions.

振动机械能在许多场景中可能具有高度破坏性，例如桥梁、管道、精密仪器和地铁。这些能量可以转换成电能，不仅可以为无线传感器节点供电，还可以保护振动物体。然而，在管道复杂的振动环境中，从单一方向收集机械能是不够的。在这项研究中，夹层电磁能量收集器设计有交替的南北方向磁体阵列，可将水平和垂直振动机械能转换为电能。实验结果表明，该装置能够同时采集水平和垂直两个方向的振动能量，并且可以同时采集两个方向的振动能量。这种创新的能量采集器能够将管道多个方向的振动能量转化为电能，既可以保护管道，又可以自供电来检测管道工况。