System for adjusting a magnetic sensor to detect the presence of

Details System for adjusting a magnetic sensor to detect the presence of System for adjusting a magnetic sensor to detect the presence of

1997-12-18

2000-10-03

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Calibration

3242072, 32420726, 32420721, G01B 714, G01B 730, G01R 3500

Patent

active

061278211

ABSTRACT:
A proximity detector that employs a Hall-effect flux sensor disposed between the like poles of two magnets. The opposing fields of the magnets define a null flux field at a sensing plane of the Hall-effect sensor. A proximate ferrous object will deflect the null point and will therefore apply flux to the sensor. The sensor generates a signal indicative of the presence or absence of the ferrous object. In manufacturing a preferred spatial position of the null point with respect to the Hall-effect sensor is defined by adjusting the field strength of at least one of the opposed magnets.

REFERENCES:
patent: 3179856 (1965-04-01), Kuhrt et al.
patent: 4156191 (1979-05-01), Knight et al.

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