Instrument For Measuring Length, And Method And Device For Controlling The Size Of A Fuel Rod

摘要

The invention relates, in particular, to an instrument for measuring length, comprising an inductive sensor comprising an elongate body and a tip that is movable along a longitudinal axis. The body contains windings and defines a first cavity receiving a magnetic core. The instrument further comprises a casing which extends the body along the longitudinal axis, and which defines, together with the body, a second sealed cavity containing the tip. The capacity of the casing to resiliently deform along the longitudinal axis is greater than the capacity of said casing to resiliently deform along axes that are orthogonal to said longitudinal axis.

主权项

1. A length measurement instrument (10) comprising an inductive sensor (11) comprising an elongate body (14) having a longitudinal axis and a feeler tip (17) movable along the longitudinal axis (15) of the sensor, in which the body (4) contains windings and defines a first cavity receiving a magnetic core, the instrument further comprising a casing (13) extending the body (14) along the longitudinal axis (15) and co-operating with the body (14) to define a second cavity (16) that is leaktight and that contains the feeler tip (17), the casing comprising a watertight deformable part (18) surrounding the feeler tip (17) and
an abutment portion (19) extending in line with the feeler tip (17) and wherein the capacity of the casing for elastic deformation along the longitudinal axis (15) is greater than the capacity of the casing for elastic deformation along axes orthogonal to the longitudinal axis; and the capacity of the casing for elastic deformation along the longitudinal axis is sufficient for the feeler tip (17) to be sensitive to movement of the abutment portion (19) under the effect of an abutment force exerted on the abutment portion (19).