Hall effect measurement instrument with temperature compensation
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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Abstract
Disclosed is a Hall Effect instrument with the capability of compensating for temperature drift consistently, accurately and in real time of operation. The instrument embodies a four-point ohm meter circuit measuring Hall Effect sensor resistance and tracking the effect of temperature on the Hall Effect sensor. The instrument takes into account a relationship between the temperature and a temperature compensation index on a per probe basis, which has exhibited a deterministic difference observed by the present inventor.
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Citations
18 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification