A comprehensive evaluation method for double stress accelerated life of opgw optical cable

Abstract

The invention discloses an OPGW optical fiber dual-stress accelerated life comprehensive evaluation method which comprises the following steps: (I) evaluating the accelerated life based on temperature stress; (II) determining 48 hours as the time of a cycle test of an accelerated life test based on temperature stress, and distributing the test time on different temperature stress levels in a cycle according to the year-round actual use condition of the OPGW optical cable; (III) determining the conversion coefficient K(temperature) value; and in combination with the test time, obtaining the whole-life T(temperature) of the OPGW optical cable; (IV) evaluating the accelerated life based on vibration stress; (V) determining 48 hours as the time of a cycle test of an accelerated life test based on vibration stress and W(de) as the stress level; (VI) determining the conversion coefficient K(vibration) value; and in combination with the test time, obtaining the whole-life T(vibration) of the OPGW optical cable; and (VII) obtaining the whole-life value T=min{T(temperature), T(vibration)} of the OPGW optical cable according to the whole-life T(temperature) of the OPGW optical fiber under temperature stress obtained in the step (III) and the whole-life T(vibration) of the OPGW optical fiber under vibration stress obtained in the step (VI).

Description

technical field [0001] The invention provides an OPGW optical cable (Optical Fiber Composite Overhead Ground Wire, optical fiber composite overhead ground wire) double stress accelerated life comprehensive evaluation method, which belongs to the technical field of optical fiber equipment and its life evaluation. Background technique [0002] The life of the OPGW optical cable of the present invention generally refers to the working life of the test piece, and may also be called the reliable life. [0003] With the development of modern technology, the reliability of various products has gradually improved. For such high-reliability and long-life products, accelerated life tests are often used to evaluate product reliability and life. Accelerated life test uses accelerated stress for life test, which shortens the test time, improves efficiency, and reduces cost. A series of corresponding research and applications have been carried out in the fields of aviation, aerospace, ma...

AI Technical Summary

Problems solved by technology

However, for products with high reliability, long life, and small samples, the traditional accelerated life test technology has difficulties: first, there are too few failure samples for long-life products within a feasible time, or the cost of a single test sample is too high to provide sufficient Therefore, it is impossible to obtain the key parameters of the conventional acceleration model; the second is that the failure mechanism of some products is too complicated to find a suitable acceleration model

[0005] OPGW optical cable is a high-reliability, long-life product with complex failure mechanisms

In a short test time, it is difficult to obtain enough failure data, and the above-mentioned typical accelerated life model is not suitable for the failure mechanism of this type of product, and it is difficult to achieve the purpose of reliable life estimation for this product

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