| 摘要 |
<p>PURPOSE: To enable endureraue against a high external environmental pressure and an oscillation and an impact by a method wherein a support post is provided between a sensor core and a sensor face of a housing. CONSTITUTION: A sensor core 18 serving as variable inductance means of a magnetic field core structure is disposed inside a housing 2 via a cylindrical insert 24 for positioning, and magnetic coils 20, 22 are disposed enclosing the core 18, There coils20, 22 are connected to conductors 14, 16, and in cleansed bride variable inductance structure, the existence of an external iron system body is detected by a change of inductance, At this time, a non-magnetic support post 26 is arranged between sensor faces 6 on an objective axis of the core 18 at the end part, a load from the sensor face 6 is transmitted to an objective axis of the core 18, shell effects by an external pressure are cancelled and core inductance is improved. Further, an insert 28 made of elastomer encloses a projecting end part of the post 26 and acts as a barrier between the sensor faces 6.</p> |
