METHOD FOR DETECTING THE PRESENCE OF BUBBLES DURING OPERATIONS OF INJECTING RESIN FOR THE MANUFACTURE OF FIBRE COMPOSITE COMPONENTS

摘要

A method of detecting bubbles during operations for injecting resin for the manufacture of fibre composite components, is noteworthy in that the electrical capacitance or conductivity of at least one part of the medium formed by the fibres and the liquid is measured.

主权项

1. A method of detecting bubbles during resin injection operations for a manufacture of fiber composite components, by means of an installation comprising:
at least one mould and one counter-mold; at least one pair of electrodes respectively disposed in the mould and the counter-mould; a source of alternating current input voltage (Vin (t)) connected to one of the electrodes; an RC circuit connected firstly to one of the electrodes and secondly to a mass (M), at an end of which is found an alternating current reference voltage (Vref(t)); and means for signal processing, adapted to exploit measurements of said alternating current input voltage and alternating current reference voltage, wherein a rate of bubbles included between said electrodes is calculated from said measurements.