HALL EFFECT MEASUREMENT INSTRUMENT WITH TEMPERATURE COMPENSATION

摘要

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 ohmmeter 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.

主权项

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 and a magnetic field source, a data processing and display console coupled with the probe 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 ohmmeter 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 signals based on the differential signals;
a temperature compensation module configured to compute based on the at least two pairs of uncompensated raw data 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.