Magnetic proximity detector
Abstract
Abstract A DEVICE FOR DETECTING OBJECTS OF MAGNETIC PERMEABLE MATERIAL OR EXTERNAL MAGNETIC FLUX IS PROVIDED WHEREIN ONE OR MORE FLUX SOURCES HAVE OPPOSITE POLES SHUNTED BY A YOKE, OF HIGH PERMEABILITY, WHICH IS NOT PLACED IN SATURATION SOLELY BY THOSE FLUX SOURCES. AN EXTERNAL OBJECT OR FLUX SOURCE CAN SATURATE THE YOKE WITH RESULTING FORCE ON THE DEVICE OR FLUX SURROUNDING THE SATURATED YOKE MAY BE PICKED UP BY A SENSOR. WHERE TWO FLUX SOURCES ARE SHUNTED BY A YOKE AND AN AIR GAP IS BETWEEN THE OTHER SET OF POLES, A FLUX SENSOR NEAR THE YOKE RESPONDS ONLY TO FLUX (SUCH AS DUE TO A FERROUS OBJECT) THAT EFFECTIVELY SHORTENS THE AIR GAP AND EXCEEDS THAT WHICH SATURATED THE YOKE. THE SHARPLY SATURABLE YOKE GIVES THE DEVICE DEFINITE PULL-IN AND DROPOUT CHARACTERISTICS. THE AIR GAP CONFIGUARTION PROVIDES DIRECTIONAL SENSITIVITY.
Inventors
- 👤 Csaba Z Bessko
Bibliographic Details
Claims Analysis
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