| 摘要 |
The sensor (1) comprises a rigid casing (2) which has at least one input (5) for a pressure to be detected, and which defines a chamber (12) in which a movable diaphragm (6) having a surface (6b) that is operatively exposed to the pressure coming from the input (5) is mounted in a leaktight manner. A ferromagnetic core (13) is connected to the diaphragm (6) and is movable under the effect of the pressure, relative to a stationary coil (9), against the action of a reaction spring (16), in a manner such that, in operation, the inductance of the coil (9) varies according to the value of the hydraulic pressure. The casing (2) comprises a first, substantially cup-shaped body (3) with a tubular shank (3a) in which the input (5) is defined, and with an opening (3e) located at the opposite end, and a second, tubular, reel-shaped body (4) fixed in the first body (3) and having: a first end portion (4a) which clamps a peripheral portion (6a) of the diaphragm (6) in a hydraulically leaktight manner, an axially intermediate portion (4b) around which the coil (9) is wound, and a second end portion (4c) which defines a reaction surface (4e) against which the spring (16) associated with the movable core (13) reacts. |
