| 摘要 |
The reactor has strain gauges for monitoring the internal structure. Each gauge comprises electrical inductance apparatus wherein the inductance is varied by torsionally straining a ferromagnetic electrical conductor to vary magnetic coupling. The ferromagnetic member is of metal sheathed mineral insulated cable arranged in hairpin form. The hairpin form of the ferromagnetic conductor (1) causes torsion-sensitive signals in the two arms to be additive whilst on undesired signal caused by stray inductive coupling is self-cancelling. Alternatively, the induction apparatus may be a pair of co-axial tubular members of ferromagnetic material with the inner member surrounded by a non-magnetic conductor of solenoid form and having a linear non- magnetic conductor disposed coaxially, the magnetic coupling being created by differential torsional displacement of the tubular members. <IMAGE> |
