Abnormal vibration is usually a precursor to structural damage and performance degradation industrial equipment and transportation. Vibration detection at critical locations such as electrical motors and bearings within large equipment has emerged as an indispensable method for machinery health monitoring. Current vibration detection instruments mostly need to be powered by cables or batteries, which has application limitations in complex moving equipment and restricted space. In this paper, a disc-like triboelectric nanogenerator (DL-TENG) with a multi-sized honeycomb structure is proposed as an innovative solution for achieving wide band and high precision acceleration detection of the vibration. Multi-diameter polytetrafluoroethylene (PTFE) balls are used as friction materials to achieve the high voltage output of the TENG, providing sufficient energy for the detection circuit. By carefully designing suitable honeycomb structures for PTFE balls of different diameters, the ability to detect broadband vibration signals is obtained. The experimental results demonstrate that DL-TENG with honeycomb structure and multi-size PTFE balls can detect acceleration signals ranging from 10 to 2000 Hz, and the acceleration measurement range can reach 1–11 m/s2 with an acceleration resolution of 0.1 m/s2. Moreover, DL-TENG can output more than 80 V peak-to-peak under vibration conditions of 11 m/s2. And under vibration conditions of 8 m/s2, the DL-TENG can fully charge a 100 μF capacitor to 5 V in just 100 seconds. By equipping a special circuit for DL-TENG, wireless self-powered vibration detection is realized. This study is expected to be applied in the scenario of vibration information collection in complex ring vibration environment and provides a new paradigm for the realization of self-powered vibration sensors.

中文翻译：

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用于自供电机械健康监测的宽频摩擦振动传感器


异常振动通常是结构损坏和性能下降的前兆工业设备和运输。在大型设备中的电机和轴承等关键位置进行振动检测已成为机械健康监测不可或缺的方法。目前的振动检测仪器大多需要由电缆或电池供电，这在复杂的移动设备和有限的空间中存在应用限制。本文提出了一种具有多尺寸蜂窝结构的圆盘状摩擦纳米发电机 （DL-TENG），作为实现宽带和高精度振动加速度检测的创新解决方案。采用多直径聚四氟乙烯 （PTFE） 球作为摩擦材料，实现 TENG 的高压输出，为检测电路提供充足的能量。通过为不同直径的 PTFE 球精心设计合适的蜂窝结构，获得了检测宽带振动信号的能力。实验结果表明，具有蜂窝结构和多尺寸PTFE球的DL-TENG可以检测10至2000 Hz的加速度信号，加速度测量范围可达1–11 m/s2，加速度分辨率为0.1 m/s2。此外，DL-TENG 可以在 11 m/s2 的振动条件下输出超过 80 V 的峰峰值。在 8 m/s2 的振动条件下，DL-TENG 可以在短短 100 秒内将 100 μF 电容器充满电至 5 V。通过配备 DL-TENG 专用电路，实现无线自供电振动检测。 该研究有望应用于复杂环振动环境下的振动信息采集场景，为自供电振动传感器的实现提供新的范式。