| 摘要 |
<p>A magnetic field-dependent,inductive proximity switch, consisting of a high frequency oscillator with oscillator coil and core, and an evaluation circuit which determines the oscillation amplitude as a function of the degree of saturation of the core and, when a specific limit value of the amplitude is reached, triggers a circuit process. The core consist, for example, of ferrite and posssesses a yoke-like body. Th switch makes it possible to have smaller sensor design shapes, with a higher sensitivity, and enables manufacture at an advantageous price by the use of a soft magnetic material for the yoke-like body such that the permeability curve, related to a quadrant of the co-ordinate system, has a pronounced S-shape.</p> |
