Proximity and Orientation Sensing Using Magnetoquasistatic Fields and Complex Image Theory

A sensing technique to determine the height and orientation (pitch, roll) above a conducting half-space using magnetoquasistatic fields and complex image theory is presented. The technique is based on measuring the fields due to the complex image of a magnetic dipole source at different locations. Examples for use of this sensor include applications as diverse as aerial vehicle landing, take-off and hovering, terrain-relative navigation, and motion sensing or tracking.