A Highly Sensitive Triboelectric Quasi‐Zero Stiffness Vibration Sensor with Ultrawide Frequency Response

Abstract

Sensors based on triboelectric nanogenerators (TENGs) have gained worldwide interest owing to their advantages of low cost and self‐powering. However, the detection of most triboelectric vibration sensors (TVS) is restricted to low frequency, whereas high‐frequency vibration signals are successfully measured in recent studies; their sensitivity still requires improvement. Hence, a highly sensitive vibration sensor based on TENG (HSVS‐TENG) with ultrawide frequency response is presented. This study is the first to introduce a quasi‐zero stiffness structure into the TENG to minimize the driving force by optimizing the magnetic induction intensity and the weight of the moving part. The results show that the HSVS‐TENG can measure vibrations with frequencies ranging from 2.5 to 4000 Hz, with a sensitivity ranging from 0.32 to 134.9 V g−1. Moreover, the sensor exhibits a good linear response versus the applied acceleration, and the linearity ranges from 0.08 to 2.81 V g−1. The self‐powered sensor can monitor the running state and fault type of the key components with a recognition accuracy of 98.9% by leveraging machine‐learning algorithms. The results reach a new height for the ultrawide frequency response and high sensitivity of the TVS and provide an idea for a follow‐up high‐resolution TVS.

Two Degrees of Freedom in Two Directions Structure Triboelectric Nanogenerator for Vibration Energy Harvesting and Self-Powered Sensing

“…For the horizontal TENG, the optimal additional mass was 10 g due to the smaller vibration amplitude and smaller excitation acceleration in the horizontal direction. For the structural optimization of the TFTD-TENG, the balance between driving resistance force and mass is also very important …”

“…For the structural optimization of the TFTD-TENG, the balance between driving resistance force and mass is also very important. 58 Through optimization of each parameter, the output performance of the TFTD-TENG can be significantly improved. In the above structural optimization experiments, we only used the output voltage as the criterion, and the change law of I sc was consistent with the output voltage.…”

A Low-Frequency Vibration Sensor Based on Ball Triboelectric Nanogenerator for Marine Pipeline Condition Monitoring

“…Numerous studies have shown that TENG has become a versatile and efficient energy-harvesting and self-powered sensing technology with applications ranging from small-scale portable electronics to large-scale blue energy harvesting [ 30 , 31 , 32 , 33 , 34 ]. TENG has the advantages of low cost, light weight, simple structure, strong environmental compatibility, wide material selection, etc., showing obvious advantages in the field of self-powered vibration sensing technology [ 35 , 36 , 37 , 38 , 39 , 40 , 41 ]. In this paper, a vibration sensor based on ball TENG (B-TENG) was designed for marine pipelines condition monitoring.…”

Surface-Engineered High-Performance Triboelectric Nanogenerator for Self-Powered Health Monitoring and Electronics

“…TENGs convert mechanical vibration into electrical energy based on triboelectrification and electrostatic induction, generating alternating current (AC) signals through repeated contact and separation of materials under the mechanical stimulus. − One advantage of TENGs is that they can work with readily available mechanical energy, which is present everywhere. The majority of mechanical signals from the human body use to communicate, such as sound, body movements, and muscle contractions, could also be used in sensors or health monitoring devices with sensitive TENGs. − Therefore, TENGs have been considered to be one of the most successful methods for extracting low-frequency mechanical energy for sensor development. By wearing a TENG device on the body respirator, cardiovascular and physical activity can be monitored.…”