Patent ID: 9651353
Date: 2017-05-16
CPC Classifications: G01B,G01R

Claim:
1. A system for measuring distance without sensor calibrations, comprising: a spherical magnet that produces pure dipole magnetic field configured to be coupled to an object under test; a linear array of at least three Hall sensors, each configured to measure the magnetic field associated with the spherical magnet and to produce at least one Hall voltage reading that corresponds to the measured magnetic field associated with the spherical magnet; a multiplexer configured to receive the at least one Hall voltage reading from each of the linear array of at least three Hall sensors in a time-division manner; a voltmeter configured to receive the at least one Hall voltage reading from each of the linear array of at least three Hall sensors based on the measured magnetic field from the multiplexer; and a controller having a memory to store computer executable instructions, and a processor to execute the computer executable instructions, when executed at the processor, the computer executable instructions are configured to