Variable load resistance by using CdS analog linear optical coupler for automated measurement of capacitive energy harvester

[Display omitted] •Automated resistance measurement system for capacitive vibration energy harvesters.•Non-polar, low capacitance, high voltage variable resistance by CdS photo coupler.•Wide range variable resistance from 100 kΩ to 10 MΩ over 50 V with picofarad.•Pulse wave modulation resistance con...

Full description

Saved in:
Bibliographic Details
Published in:Sensors and actuators. A. Physical. 2021-04, Vol.321, p.112399, Article 112399
Main Authors: Fujita, Takayuki, Fujibe, Kohei, Uchida, Hiroki, Yamamoto, Koki, Badel, Adrien, Formosa, Fabien, Kanda, Kensuke, Maenaka, Kazusuke
Format: Article
Language:English
Subjects:
Analog
Automated measurement
Automation
Cadmium
Capacitive type
CdS photo coupler
Couplers
Electric currents
Energy harvesting
Engineering Sciences
Load resistance
Measurement
Microcontrollers
Parasitics (electronics)
Piezoelectricity
Studies
Variable resistance
Vibration
Vibration energy harvester
Vibration measurement
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •Automated resistance measurement system for capacitive vibration energy harvesters.•Non-polar, low capacitance, high voltage variable resistance by CdS photo coupler.•Wide range variable resistance from 100 kΩ to 10 MΩ over 50 V with picofarad.•Pulse wave modulation resistance control using a microcontroller for automation. In this work, we demonstrate a load resistance measurement system aimed at automating a vibration type capacitive energy harvester using a CdS analog linear optical coupler as a variable resistor. The CdS variable resistor exhibits non-polar, very low parasitic capacitance below picofarad and high allowable voltage over a wide range of variable resistance. By controlling a LED driving current of the CdS analog coupler, variable resistance range of 10 MΩ to 100 kΩ was obtained by 0.4 μA–6 μA driving current. The results show that the resistance is reproducible at full scale with a low error rate of less than ±3%. The detailed characteristics of the CdS coupler and the automated measurement results of the piezoelectric MEMS vibration energy harvester by using Arduino microcontroller are also described.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2020.112399