Abstract
In this paper, we designed a triboelectric acceleration sensor with excellent multiple parameters. To more easily detect weak vibrations, the sensor was founded on a multilayer suspension structure. To effectively improve the electrical properties of the sensor, a surface roughening and internal doping friction film, which was refined with a room temperature vulcanized silicone rubber (RTV) and some thermoplastic polyurethanes (TPU) powder in a certain proportion, was integrated into the structure. It was found that the optimization of the RTV film increases the open circuit voltage and short circuit current of the triboelectric nanogenerator (TENG) by 223% and 227%, respectively. When the external vibration acceleration is less than 4 m/s2, the sensitivity and linearity are 1.996 V/(m/s2) and 0.999, respectively. Additionally, when it is in the range between 4 m/s2 and 15 m/s2, those are 23.082 V/(m/s2) and 0.975, respectively. Furthermore, the sensor was placed in a simulated truck vibration environment, and its self-powered monitoring ability validated by experiments in real time. The results show that the designed sensor has strong practical value in the field of monitoring mechanical vibration acceleration.
Highlights
Acceleration monitoring is an important source for people to obtain human–computer interaction information
This study provides an in-depth theoretical investigation into the fabrication of a highly sensitive self-powered acceleration sensor
The thermoplastic polyurethanes (TPU)-RTV films with different roughness were scanned by scanning electron microscope (SEM, SU8020, Hitachi, Tokyo, Japan) (Figure 2a–e)
Summary
Acceleration monitoring is an important source for people to obtain human–computer interaction information. Wang et al [14] invented a composite self-powered sensor for vibration and drop monitoring. Xiang et al [11] invented a shock-resistant self-powered acceleration sensor, which has excellent linearity, but its monitoring range and sensitivity are only 0–6 m/s2 and 1.33 mV/(m/s2 ), respectively. The vertical contact separation mode of the TENG is more suitable for mechanical vibration environments due to its high instantaneous power output and the ease of multilayer integration [20,21,22]. A multilayer suspended self-powered acceleration sensor (MSSAS) is designed. Traditional acceleration sensors are composed of masses, dampers, elastic elements, and sensitive elements In this design, the internal vibration column is used as the mass of the sensor, and the tension spring as the damper and elastic element. This study provides an in-depth theoretical investigation into the fabrication of a highly sensitive self-powered acceleration sensor
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