3-Axis, Ultrahigh-Sensitivity, Miniature Acceleration Sensor
| Autor: | Marvin H. M. Cheng, Roger A. Kyle, Ezzat G. Bakhoum |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Supercapacitor
Materials science business.industry 020208 electrical & electronic engineering 02 engineering and technology Carbon nanotube Electrolyte 01 natural sciences Capacitance Industrial and Manufacturing Engineering Electronic Optical and Magnetic Materials law.invention Acceleration law 0103 physical sciences Electrode 0202 electrical engineering electronic engineering information engineering Variable capacitor Optoelectronics Sensitivity (control systems) Electrical and Electronic Engineering 010306 general physics business |
| Zdroj: | IEEE Transactions on Components, Packaging and Manufacturing Technology. 8:244-250 |
| ISSN: | 2156-3985 2156-3950 |
| DOI: | 10.1109/tcpmt.2017.2773499 |
| Popis: | This paper introduces a miniature, 3-axis, acceleration sensor with extremely high sensitivity. The sensor is of the variable capacitance type. However, instead of using a conventional variable capacitor configuration, the sensor is based on a variable ultracapacitor (or supercapacitor). A very small droplet of electrolyte is positioned in between six electrodes that are arranged in the form of a cube. The inner surfaces of the electrodes are coated with carbon nanotubes (CNTs), and hence a variable ultracapacitor exists between any two of the six electrodes. Acceleration forces the electrolyte droplet to move in different directions and take different shapes, thereby altering the capacitance between any two given electrodes in the device. The prototype described in this paper has shown an inter-electrode capacitance variation of 7.5 $\mu \text{F}$ under an acceleration increase from 0 to 100 g. The sensitivity is therefore 75 nF/g. |
| Databáze: | OpenAIRE |
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