Ultra−Wide Range Vibration Frequency Detection Sensors Based on Elastic Steel Triboelectric Nanogenerators for Intelligent Machinery Monitoring

Abstract

Vibration measurement and analysis play an important role in diagnosing mechanical faults, but existing vibration sensors are limited by issues such as dependence on external power sources and high costs. To overcome these challenges, the use of triboelectric nanogenerator (TENG)−based vibration sensors has recently attracted attention. These vibration sensors measure a small range of vibration frequencies and are not suitable for measuring high-frequency vibrations. Herein, a self-powered vibration sensor based on an elastic steel triboelectric nanogenerator (ES−TENG) is proposed. By optimizing the elastic steel sheet structure and combining time-frequency transformation and filtering processing methods, the measurement of medium- and high-frequency vibrations is achieved. These results demonstrate that the ES−TENG can perform vibration measurements in the range of 2–10,000 Hz, with a small average error (~0.42%) between the measured frequency and external vibration frequency values. Therefore, the ES−TENG can be used as a self-powered, highly-accurate vibration sensor for intelligent machinery monitoring.

Anti‐Self‐Excited Oscillation Triboelectric Nanogenerators for Energy Harvesting of Aeolian Vibration in Transmission Line

“…The voltage is then transmitted wirelessly to the power operation control center, enabling intermittent monitoring of the transmission lines' health status. [31][32][33]…”

Advances in Triboelectric Flow Sensor

“…[3,121,[126][127][128] For materials, the output performance can be further optimized by surface treatment. [129][130][131] Based on these advantages, it has been widely used in displacement sensors, [132][133][134][135][136] pressure sensors, [137][138][139][140] vibration sensors, [120,[141][142][143][144][145] velocity sensors [146][147][148] and flow sensors. [149][150][151][152] Compared with the traditional power-supplied sensors, one of the major advantages of these triboelectric sensors is that they do not need additional power supply or chemical battery power supply, [153] because they rely on the electrical output generated by the mechanical trigger directly as the detection signal, which provides an effective solution to realize the intelligent and wireless development of flow monitoring.…”

Triboelectric Nanogenerator with a Rotational Freestanding Mode for Multi-directional Vibration Energy Harvesting

“…The freestanding mode has been proved to have a higher charge-transfer efficiency than the contact-separation mode in vibration conditions with weak excitation and insufficient triboelectric layers contact . Due to the flexibility and no-contact mode, the TENGs based on freestanding mode have received extensive attention . For example, Wang et al proposed a contact-mode freestanding triboelectric nanogenerator (CF-TENG), which can quantify the amplitude and frequency.…”

“…41 Due to the flexibility and nocontact mode, the TENGs based on freestanding mode have received extensive attention. 42 For example, Wang et al 43 proposed a contact-mode freestanding triboelectric nanogenerator (CF-TENG), which can quantify the amplitude and frequency. CF-TENG can effectively sense the subtle vibrations with 3.5 μm amplitude.…”