| Issue |
MATEC Web of Conferences
Volume 61, 2016
The International Seminar on Applied Physics, Optoelectronics and Photonics (APOP 2016)
|
|
|---|---|---|
| Article Number | 02015 | |
| Number of page(s) | 4 | |
| Section | Chapter 2 Electronic Technology and Electrical Engineering | |
| DOI | https://doi.org/10.1051/matecconf/20166102015 | |
| Published online | 28 June 2016 | |
Research on Stealthy Headphone Detector Based on Geomagnetic Sensor
1
Research Institute for Magneto-electronics & nT Magnetic Field Detection, China Three Gorges University, Yichang 443002, China
2
College of Science, China Three Gorges University, Yichang 443002, China
a Corresponding author: zhihui_luo@126.com
A kind of stealth headphone detector based on geomagnetic sensor has been developed to deal with the stealth headphones which are small, extremely stealthy and hard to detect. The U.S. PNI geomagnetic sensor is chosen to obtain magnetic field considering the strong magnetic performance of stealth headphones. The earth’s magnetic field at the geomagnetic sensor is eliminated by difference between two geomagnetic sensors, and then weak variations of magnetic field is detected. STM8S103K2 is chosen as the central controlling chip, which is connected to LED, buzzer and LCD 1602. As shown by the experimental results, the probe is not liable to damage by the magnetic field and the developed device has high sensitivity, low False Positive Rate (FAR) and satisfactory reliability.
© Owned by the authors, published by EDP Sciences, 2016
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