Carrier material impregnation

摘要

For the impregnation of a carrier material, by immersion, the dielectric constant of the material changes during impregnation. A value (C) is measured, related to the dielectric constant, which gives the impregnating penetration (D) of the carrier material. In an Independent claim the monitoring system has a conductor (3) so that the carrier material acts as a dielectric to affect the electrical capacity of the conductor (3), which is measured. The conductor can be an electrically conductive strip, around the carrier material, with the electrical lead of the conductor rod. To measure the value (C), the electrical capacity is used of an electrical conductor, with the carrier material acting as a dielectric. The timed run (C(t)) of the measurement gives the timed run (D(t)) of the impregnation. A functional relationship (DR(C)) between a reference impregnation (DR) and the measured value gives the functional relationship of the impregnation. The timed run (D(t)) of the impregnation (D) is expressed as D(t)=DR(C(t)), where D is the impregnation, DR the reference impregnation, C the measured value and especially capacity, and t is the time. The amount of impregnation is defined as the ratio of impregnated and non-impregnated vols. of the carrier material. To determine the stages of impregnation, according to given parameters, each stage has a reference impregnation provided by a simulation model with a spaced distribution in the carrier material with at least one zone which is not impregnated and one zone which is impregnated. At least one dry zone (4) has an initial dielectric constant and at least one damp zone (5) has another dielectric constant. Each reference impregnation (DR), together with the dielectric constants, is associated with a measured value (C) to give the required functional relationship (CD(C)). Using a porous carrier material, the spaced distribution of the reference impregnation (DR) uses the Darcy law for a current of a Newton impregnation medium or by using a suitable modification of the Darcy law for a non-Newton impregnation medium. From the impregnation (D), the penetration depth is derived of the impregnation medium in the carrier material, in a timed run of the penetration and at least one factor of the filtration coefficient, flow resistance, permeability and relative porosity, which also gives the viscosity of the impregnating medium. The material can be the fibers, to be impregnated and form the compound material, or the carrier material is an electrical insulation.