Characterization of Self-Powered Triboelectric Tachometer with Low Friction Force

Self-powered triboelectric tachometers have wide application prospects in mechanical and electrical industries. However, traditional disc-type tachometers typically require large contact force, which burdens rotary load and increases frictional wear. To reduce the friction force of triboelectric tachometers, we present an alternative structure defined by flapping between rigid and flexible triboelectric layers. In this work, we further characterize this type of tachometer, with particular focus on the oscillating relationship between output voltage and rotation speed due to the plucking mechanism. This oscillating relationship has been demonstrated both theoretically and experimentally. For future self-powered triboelectric tachometers, the proved oscillating relationship can be applied as calibration criteria for further enhancing sensitivity and linearity in rotation measurement.

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A High Sensitivity Self-Powered Wind Speed Sensor Based on Triboelectric Nanogenerators (TENGs)

Sensors ◽

10.3390/s21092951 ◽

2021 ◽

Vol 21 (9) ◽

pp. 2951

Author(s):

Yangming Liu ◽

Jialin Liu ◽

Lufeng Che

Keyword(s):

Wind Speed ◽

High Sensitivity ◽

Electrical Signal ◽

Geometrical Parameters ◽

Sensor Systems ◽

Speed Sensor ◽

Speed Range ◽

Self Powered ◽

Triboelectric Nanogenerators ◽

Application Prospects

Triboelectric nanogenerators (TENGs) have excellent properties in harvesting tiny environmental energy and self-powered sensor systems with extensive application prospects. Here, we report a high sensitivity self-powered wind speed sensor based on triboelectric nanogenerators (TENGs). The sensor consists of the upper and lower two identical TENGs. The output electrical signal of each TENG can be used to detect wind speed so that we can make sure that the measurement is correct by two TENGs. We study the influence of different geometrical parameters on its sensitivity and then select a set of parameters with a relatively good output electrical signal. The sensitivity of the wind speed sensor with this set of parameters is 1.79 μA/(m/s) under a wind speed range from 15 m/s to 25 m/s. The sensor can light 50 LEDs at the wind speed of 15 m/s. This work not only advances the development of self-powered wind sensor systems but also promotes the application of wind speed sensing.

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Experimental Study of Thermoelectric Generators

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.663.299 ◽

2014 ◽

Vol 663 ◽

pp. 299-303 ◽

Cited By ~ 2

Author(s):

Ubaidillah ◽

Suyitno ◽

Imam Ali ◽

Eko Prasetya Budiana ◽

Wibawa Endra Juwana

Keyword(s):

Output Voltage ◽

Thermoelectric Generator ◽

Electrical Energy ◽

Thermoelectric Generators ◽

Data Logger ◽

Computer Data ◽

Standard Module ◽

Self Powered ◽

Resistive Loads ◽

The Relationship

Thermoelectric generator is solid-state device which convert temperature difference, ∆T into electrical energy based on Seebeck effect phenomenon. The device has been widely used in self-powered system applications. This paper focuses on presentation of methodology for characterizing thermoelectric generators. The measurement of its behavior is performed by varying load resistances. A standard module of thermoelectric generator (TEC1-12710) is used in examination and an instrument setup consists of controllable heat source, controllable cooler, personal computer, data logger MCC DAQ USB-1208LS equipped with two sets of K-type thermocouples. The experiment is performed by measuring output voltage and output current in 4 values of temperature gradient by applying 10 values of resistive loads connected to the thermoelectric output wires. The common parameters studied in this research are output voltage, current and power. Generally, the relationship between parameters agrees with the basic theory and the procedure can be adopted for characterizing other type of thermoelectric generator.

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Study of the micro/nano-texture design to improve the friction properties of DLC thin films

International Journal of Modern Physics B ◽

10.1142/s0217979221400270 ◽

2021 ◽

pp. 2140027

Author(s):

Young Woo Kwon ◽

Mun Ki Bae ◽

Ri-Ichi Murakami ◽

Tae Hwan Jang ◽

Tae Gyu Kim

Keyword(s):

Thin Film ◽

Coefficient Of Friction ◽

Surface Friction ◽

Low Friction ◽

Frictional Wear ◽

The Coefficient Of Friction ◽

Surface Contact Area ◽

Photolithography Process ◽

Texture Design ◽

Pattern Width

In this study, a DLC pattern was fabricated through a photolithography process that constitutes a part of the semiconductor process, to investigate the frictional wear characteristics. The photolithography was used to produce negative patterns with a pattern width of 10 [Formula: see text]m or 20 [Formula: see text]m and a pattern depth of 500 nm on the DLC surface. The change in the coefficient of friction of the surface was investigated through a ball-on-disk tribology test on the fabricated micro/nano-sized DLC pattern. The DLC pattern fabricated by the photolithography process showed a superior coefficient of friction to that of the general DLC sample. These results show that the decrease in the surface friction coefficient of the patterned DLC thin film is due to the reduction in the surface contact area owing to the modification of the micro/nano-texture of the surface as well as the low friction characteristics of the DLC.

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Compositional Characterization of III-V Semiconductor Heterostructures by Friction Force Microscopy

Micro/Nanotribology and Its Applications ◽

10.1007/978-94-011-5646-2_19 ◽

1997 ◽

pp. 275-282 ◽

Cited By ~ 1

Author(s):

R. Garcia ◽

J. Tamayo ◽

L. Gonzalez ◽

Y. Gonzalez

Keyword(s):

Friction Force ◽

Semiconductor Heterostructures ◽

Friction Force Microscopy ◽

Force Microscopy ◽

Compositional Characterization

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On numerical signal processing of an evolutive friction force: characterization of successive stages of wear regime in dry sliding of steel on steel

The Running-in Process in Tribology ◽

10.1016/b978-0-408-01226-3.50018-4 ◽

1982 ◽

pp. 77-83 ◽

Cited By ~ 1

Author(s):

A. Aouichi ◽

J. Blouet ◽

J. Vinh

Keyword(s):

Signal Processing ◽

Friction Force ◽

Dry Sliding

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A Two-Degree-of-Freedom Cantilever-Based Vibration Triboelectric Nanogenerator for Low-Frequency and Broadband Operation

Electronics ◽

10.3390/electronics8121526 ◽

2019 ◽

Vol 8 (12) ◽

pp. 1526 ◽

Cited By ~ 2

Author(s):

Gang Tang ◽

Fang Cheng ◽

Xin Hu ◽

Bo Huang ◽

Bin Xu ◽

...

Keyword(s):

Output Voltage ◽

Low Frequency ◽

Degree Of Freedom ◽

Triboelectric Nanogenerator ◽

Energy Harvesters ◽

Harvesting Technique ◽

Wide Range ◽

Operating Bandwidth ◽

Self Powered ◽

Two Degree Of Freedom

With the continual increasing application requirements of broadband vibration energy harvesters (VEHs), many attempts have been made to broaden the bandwidth. As compared to adopted only a single approach, integration of multi-approaches can further widen the operating bandwidth. Here, a novel two-degree-of-freedom cantilever-based vibration triboelectric nanogenerator is proposed to obtain high operating bandwidth by integrating multimodal harvesting technique and inherent nonlinearity broadening behavior due to vibration contact between triboelectric surfaces. A wide operating bandwidth of 32.9 Hz is observed even at a low acceleration of 0.6 g. Meanwhile, the peak output voltage is 18.8 V at the primary resonant frequency of 23 Hz and 1 g, while the output voltage is 14.9 V at the secondary frequency of 75 Hz and 2.5 g. Under the frequencies of these two modes at 1 g, maximum peak power of 43.08 μW and 12.5 μW are achieved, respectively. Additionally, the fabricated device shows good stability, reaching and maintaining its voltage at 8 V when tested on a vacuum compression pump. The experimental results demonstrate the device has the ability to harvest energy from a wide range of low-frequency (<100 Hz) vibrations and has broad application prospects in self-powered electronic devices and systems.

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Low-friction mechanism of silicon carbide and cemented carbide in water

Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology ◽

10.1177/1350650120928689 ◽

2020 ◽

pp. 135065012092868

Author(s):

Fei Guo ◽

Fan Wu ◽

Fangyong Wu ◽

Yuming Wang

Keyword(s):

Silicon Carbide ◽

Tribological Properties ◽

Rotation Speed ◽

Hydrodynamic Lubrication ◽

Cemented Carbide ◽

Matched Pairs ◽

Low Friction ◽

Friction Mechanism ◽

Friction Coefficients ◽

Test Conditions

The tribological properties of self-mated silicon carbide, self-mated cemented carbide, and cemented carbide/silicon carbide under water lubrication were studied. The three matched pairs could achieve low-friction coefficients (0.01–0.03) under certain test conditions. Additionally, the dependence of the friction coefficients on the rotation speed and load were measured. By combining these results with the observed surface topography and wear measurements, it was determined that the three matched pairs were in the hydrodynamic lubrication. In addition, combined with experiments in ethylene glycol and PAO40, it was shown that the actual viscosity of the lubricant had a significant influence on the realization of low friction. Furthermore, matching materials had an influence on the tribological properties, which may be related to the surface wettability of the lubricant.

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