Method For The Non-Destructive Testing Of An Elastomer Cable Insulation Sheath, Device And Programme

The method according to any one of the preceding claims, characterized in that the first parameter (P1) comprises the average molar mass (Mc) of the elastically active chains (A) of the macromolecular network of the elastomeric polymer,

• the second parameter (P2) includes an elongation (εr) at break having been determined from the average molar mass (Mc) of the elastically active chains (A),
• the assessment step (E3) including the comparison (E32) of the elongation (εr) at break with the prescribed assessment threshold (S) in order to determine that the cable (CB) is at the end of its life when the elongation (εr) at break is below the prescribed assessment threshold (S).

The method according to any one of the preceding claims, characterized in that it includes a step (E1) of taking a sample of the insulating cable sheath, the step (E2) of measurement using proton nuclear magnetic resonance being carried out on the sample.

The method according to any one of the preceding claims, characterized in that the taken mass of the sample of the insulating sheath (G) of the cable (CB) during the sampling step (E1) is from 20 to 40 mg.

The method according to any one of the preceding claims, characterized in that it includes a step (E1bis) of bringing a device for measurement using proton nuclear magnetic resonance into contact with the insulating sheath (G) of the cable (CB), the measurement step (E2) being carried out by the device for measurement using proton nuclear magnetic resonance.

A computer program, including code instructions for implementing the method according to any one of the preceding claims, when it is implemented on a calculator.

A device for non-destructive testing of an insulating sheath (G) made of a material of at least one elastomeric polymer of a cable (CB),

• characterized in that it includes a device (E1, E1bis) for measurement using proton nuclear magnetic resonance on the insulating sheath (G) in order to measure at least a first parameter (P1) characterizing the elastically active chains (A) of the macromolecular network of the elastomeric polymer, the first parameter (P1) comprising the fraction (FCEA) of elastically active chains (A) of the macromolecular network of the elastomeric polymer and/or the average molar mass (Mc) of the elastically active chains (A) of the macromolecular network of the elastomeric polymer,
• and a calculator for implementing an assessment step (E3) including a comparison of the first parameter (P1) characterizing the elastically active chains (A) and/or of a second parameter (P2) having been determined from the first parameter (P1) characterizing the elastically active chains (A), with at least one prescribed assessment threshold (S) in order to determine that the cable (CB) is at the end of its life when the first parameter (P1) and/or the second parameter (P2) is below the prescribed assessment threshold.