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Proof-testing and probabilistic lifetime estimation of glass fibers for sensor applications

机译:传感器应用的玻璃纤维的验证测试和概率寿命估算

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摘要

The mechanical reliability of sensing glass fiber is one of the important problems in the practical use of fiber-optic sensors. To ensure long-term reliability on a mass-production level, a method of proof-testing is applied to a sensing glass fiber that will be subjected to mechanical deformation in its service situation. We propose to employ a higher strain level (screening level) in the proof-testing with a fiber-recoating technique that can suppress excessive damage during the testing. We consider a standard lifetime of 15 years of automotive applications and ensure a practical level of failure probability by a model calculation by using the strength data of a prototype fiber with the method of fracture-mechanics theory.
机译:传感玻璃纤维的机械可靠性是光纤传感器实际使用中的重要问题之一。为了确保在批量生产水平上的长期可靠性,对检测的玻璃纤维采用了验证测试的方法,该玻璃纤维在使用状态下会发生机械变形。我们建议在纤维测试中采用较高的应变水平(筛选水平),这种纤维重涂技术可以抑制测试过程中的过度损坏。我们考虑汽车应用的标准寿命为15年,并通过使用断裂力学理论方法使用原型纤维的强度数据进行模型计算来确保实用的故障概率水平。

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