Cable strain monitoring

Details Cable strain monitoring Cable strain monitoring

1980-11-13

1982-09-21

Myracle, Jerry W.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Specified electrical sensor or system

57 19, 57265, G01B 716

Patent

active

043500463

ABSTRACT:
A major problem in the manufacture of optical fibre cables is the strain to which the fibres are subjected, which strain could damage the fibres. To enable this strain to be monitored, and hence remedial action to be taken, one or more metallic elements are incorporated in the cable, each such element with its insulation being similar in thickness to an optical fibre with its sheath. The electrical resistance of the metallic elements varies very little with temperature, but does vary with strain, so by monitoring resistance, one monitors strain.
Although mainly intended for use during manufacture, the method can be used whenever strain monitoring is needed.

REFERENCES:
patent: 3779071 (1973-12-01), Thomas, Jr. et al.
patent: 4278835 (1981-07-01), Jackson
Mitsunaga, Y. et al. Strain Measurement in Coated . . . Wire, from Transactions of IECE of Japan, vol. E62, No. 9, Sep. '79, pp. 620 and 621.

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