EM Field Head Tracking System specifications

Introduction

The EMF head tracking system consists of field coils in the walls of a booth that create X,Y and Z (or Horizontal, Frontal and Vertical) oscillating EM fields with different frequencies. The fields are sensed by a small pick-up coil mounted on a glasses frame worn by a subject. The signal is analysed and converted into a position of the subjects head relative to his/her default forward looking resting position.

Parts

EMF Head Tracking System Schematics.png %todo

• X, Y and Z Oscillators
• three amplifiers
• three resonance circuits
• three sets of opposite facing wall coils
• pick-up coil
• three lock-in amplifiers
• three ADC's
• recording device (RZ6 or RA16)