New Self-diagnostic Fiber Optical Sensor Technique for Structural Health Monitoring

Köppe, Enrico; Bartholmai, Matthias; Daum, Werner; Gong, Xun; Holmann, Detlef; Basedau, Frank; Schukar, Vivien; Westphal, Anja; Sahre, Mario; Beck, Uwe

doi:10.1016/j.matpr.2016.03.038

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…[19] describes the use of electrical impedance spectroscopy measurement to enable self-monitoring of semiconductor gas sensor systems. In [20], methods to enable a validation of the sensor functions under operational conditions are suggested, which include the use of a magnetostrictive coated fiber. For piezoelectric wafer active sensors (PWAS), self-diagnosis capabilities exist, which are mainly based on the transducers physics.…”

Section: Introductionmentioning

confidence: 99%

Failure Assessment of Piezoelectric Actuators and Sensors for Increased Reliability of SHM Systems

Mueller¹,

Fritzen²

2018

Structural Health Monitoring From Sensing to Processing

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In the chain from sensing to information extraction, there are many traps where errors can occur, which might lead to false alarms and therefore leave us with the impression of an unreliable system. In this chapter, we deal with the important first element of the chain, the sensor, which can undergo various faults and defects during its lifetime. Especially for the use of acousto-ultrasonic (AU)-based methods or the electro-mechanical impedance (EMI) method, piezoelectric transducers are frequently used. Subsequent steps within the chain of SHM rely on the quality and reliability of these measurements. An overview is given on the usage of piezoelectric transducers within SHM systems, their electromechanical coupling and its modeling as well as frequent faults of these devices and methods on how to inspect them and diagnose defects. The authors show the effects of different transducer faults on the excited wave field, used for AU. It is shown how a sensor fault can be detected before the SHM system indicates a (false) alarm. With the help of application scenarios-including temperature variations-the advantages and disadvantages of the introduced methods of transducer inspection are presented, enabling an increased reliability of SHM systems.

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Section: Introductionmentioning

confidence: 99%

Failure Assessment of Piezoelectric Actuators and Sensors for Increased Reliability of SHM Systems

Mueller¹,

Fritzen²

2018

Structural Health Monitoring From Sensing to Processing

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“…Введение. Одним из наиболее перспективных направлений разработки измерительноинформационных комплексов является использование сенсоров на основе волоконных брэгговских решеток (ВБР) [1,2]. В настоящее время решетки Брэгга широко применяются в волокнах и планарных волноводах для уплотнения каналов (технологии WDM) [3] и фильтрации оптического сигнала, а также в качестве зеркал резонаторов в волоконных и полупроводниковых лазерах [4], сглаживающих фильтров в оптических усилителях и для дисперсионной компенсации в магистральных каналах связи [5,6].…”

Section: ключевые слова: волоконная брэгговская решетка интерферометunclassified

Fiber Bragg gratings inscription using Talbot interferometer and KrF excimer laser system

Stam¹,

Idrisov²,

Gribaev³

et al. 2017

Izv. vysš. učebn. zaved., Priborostr.

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“…The investigation of strain and stress of the fiber-coating system presented in this publication was part of the successful development of a self-diagnostic concept of FBG sensors, using the magnetostrictive properties of the NiFe layers. 6…”

mentioning

confidence: 99%

Fiber Bragg Gratings for In-Situ Stress Monitoring of Electrochemical Deposition

Mitzkus¹,

Sahre²,

Basedau³

et al. 2019

J. Electrochem. Soc.

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The in-situ monitoring of electrochemical deposition (ECD) processes is still a challenge regarding the measurement of the effective temperature of the substrate and the formation of mechanical stress in the layer under given plating conditions. Monitoring problems can be solved by applying a pre-coated fiber Bragg grating (FBG) to the electrolytic process as the shift of the Bragg wavelength is affected by both the temperature of the electrolyte near the substrate and the stress formation in the growing layer. The experimental FBG set-up and the quantitative determination of temperature-and stress-related strain is described for a nickel-iron electrolyte.

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New Self-diagnostic Fiber Optical Sensor Technique for Structural Health Monitoring

Cited by 6 publications

References 4 publications

Failure Assessment of Piezoelectric Actuators and Sensors for Increased Reliability of SHM Systems

Failure Assessment of Piezoelectric Actuators and Sensors for Increased Reliability of SHM Systems

Fiber Bragg gratings inscription using Talbot interferometer and KrF excimer laser system

Fiber Bragg Gratings for In-Situ Stress Monitoring of Electrochemical Deposition

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