Abstract
It is shown that an array of D-dot sensors can be implemented to not only detect, but for the first time, image very low-frequency electric fields. D-dot sensors sense current proportional to the time derivative of the electric field. The signal of interest is extracted from each D-dot pixel using a lock-in amplifier through an automated multiplexer. We have successfully rendered very low-frequency electric field images from energized wires using the proposed electric field imager. As a proof-of-concept, the arrays were fabricated on both a printed circuit board and a flexible polyethylene naphthalate substrate, the latter of which incorporates a thin-film transistor process. Such a device will have commercial and industrial applications, such as imaging sources of electromagnetic interference as well as security applications for noninvasive monitoring.
| Original language | English (US) |
|---|---|
| Article number | 7407603 |
| Pages (from-to) | 3181-3187 |
| Number of pages | 7 |
| Journal | IEEE Sensors Journal |
| Volume | 16 |
| Issue number | 9 |
| DOIs | |
| State | Published - May 1 2016 |
Keywords
- D-dot sensor
- Flexible electronics
- electric fields
- imaging
- sensor array
- very low frequency
ASJC Scopus subject areas
- Instrumentation
- Electrical and Electronic Engineering