Muhammad Adnan, Dirk Hammerschmidt, Mario Huemer,
"Phase Demodulation of Magnetic GMR Signal for Virtual Sensing Applications by using Hilbert Transform"
: Proceedings of the International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO 2015) ? Microelectronics, Electronics and Electronic Technology (MEET), Seite(n) 133-136, 5-2015
Original Titel:
Phase Demodulation of Magnetic GMR Signal for Virtual Sensing Applications by using Hilbert Transform
Sprache des Titels:
Englisch
Original Buchtitel:
Proceedings of the International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO 2015) ? Microelectronics, Electronics and Electronic Technology (MEET)
Original Kurzfassung:
GMR (Giant MagnetoResistance) sensors, which are used in conjunction with magnetic encoders (magnetic pole wheels), have a huge number of applications in automotive and machine industry, where they are used to compute the rotational
speed of rotating parts like wheels and shafts. In this paper, we present an analytical model of magnetic pole wheel signal as it is sensed by a GMR sensor. Experimental measurements are performed to check the validity of the mathematical model. Furthermore, we present a novel digital signal processing technique,
which incorporates the Hilbert transformer to phase demodulate this GMR signals to compute high resolution instantaneous position and speed information. A frequency domain Analysis is then deployed to analyze the signal for any low frequency vibrations present in the rotating part.
Forschungs-