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Hall effect measurement instrument with temperature compensation

  • US 9,063,174 B2
  • Filed: 11/12/2013
  • Issued: 06/23/2015
  • Est. Priority Date: 11/14/2012
  • Status: Active Grant
First Claim
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1. An instrument measuring Hall Effect of at least one Hall sensor magnetically coupled with a target during a measurement session, comprising:

  • a probe including the Hall sensor, a magnetic field source and a temperature sensor configured to provide a probe temperature reading on or at a very close proximity of the magnetic field source;

    a data processing and display console coupled with the probe at a predetermined distance with an electronic coupling means, the console further comprising,a Hall Effect measurement circuit connected with the Hall sensor via the coupling means, the Hall Effect measurement circuitry further including at least partially a Four-Wire Ohm Meter circuit, which captures at least two pairs of differential signals from the Hall Effect sensor,a data acquisition and processing module configured to receive signals from the Hall Effect measurement circuit and provide at least two pairs of uncompensated raw based on the differential signals;

    a temperature compensation module configured to compute based on the at least two pairs of uncompensated raw data and the temperature reading and a probe slope associated with the probe to produce a temperature compensation index;

    a measurement conversion module configured to provide a corrected Hall Effect measurement data by correcting the raw signal data using information corresponding to the temperature compensation index.

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