Soldering fiber Bragg grating sensors for strain measurement

Müller, Mathias S.; Hoffmann, Lars; Lautenschlager, Tobias; Koch, Alexander W.

doi:10.1117/12.786088

Cited by 5 publications

(4 citation statements)

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“…It should be noted that the residual stress after welding was large. To eliminate possible damage to the FBG caused by the high temperature of the welding process, in 2008, Müller et al [132] used a soft-brazing method to encapsulate the metallized FBG on the metal structure using a tin-based brazing material at a temperature of 200°C to achieve the structural health monitoring.…”

Section: Electroplatingmentioning

confidence: 99%

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Recent advances in optical fiber high-temperature sensors and encapsulation technique [Invited]

å¾�,

å�ž,

æ¢�

et al. 2023

Chin. Opt. Lett.

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In the aerospace field, for aerospace engines and other high-end manufacturing equipment working in extreme environments, like ultrahigh temperatures, high pressure, and high-speed airflow, in situ temperature measurement is of great importance for improving the structure design and achieving the health monitoring and the fault diagnosis of critical parts. Optical fiber sensors have the advantages of small size, easy design, corrosion resistance, anti-electromagnetic interference, and the ability to achieve distributed or quasi-distributed sensing and have broad application prospects for temperature sensing in extreme environments. In this review, first, we introduce the current research status of fiber Bragg grating-type and Fabry-Perot interferometer-type high-temperature sensors. Then we review the optical fiber hightemperature sensor encapsulation techniques, including tubular encapsulation, substrate encapsulation, and metalembedded encapsulation, and discuss the extreme environmental adaptability of different encapsulation structures. Finally, the critical technological issues that need to be solved for the application of optical fiber sensors in extreme environments are discussed.

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Section: Electroplatingmentioning

confidence: 99%

“…Up to 600°C Strain monitoring in high temperature environments 2008 [132] Conductive lacquer, electroplating and brazing…”

Section: Sapphire Fiber Single-mode Transmissionmentioning

confidence: 99%

Recent advances in optical fiber high-temperature sensors and encapsulation technique [Invited]

å¾�,

å�ž,

æ¢�

et al. 2023

Chin. Opt. Lett.

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“…The embedded sensor showed good response in both strain and temperature after the joining process [3]. Müller et al observe that by soldering metal-coated FBGs, the spectral response of the fiber Bragg grating change and that wavelength shifts towards shorter wavelengths occur as a result of the strains induced by cooling [13].…”

Section: Introduction and State Of The Artmentioning

confidence: 99%

Feasibility study of using integrated fiber optical sensors to monitor laser-assisted metal–polymer joining

et al. 2020

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The possibilities and challenges of using fiber optical sensors to monitor the laser-assisted joining of metal-polymer joints have been described in this article. Fundamental investigation proves the basic suitability of the measuring method for this application and studies the effect of essential influencing variables of the joining process-e.g., the clamping force-on the resulting sensor signals. In addition, the strain state (because of the process temperature and shrinkage of the polymer) of the parts to be joined can be traced as a function of the joining partners, the process parameters, and the material thicknesses. It is shown that the fiber optical method is suitable for process monitoring directly in the joining zone of metal-polymer hybrids and providing a tool for detailed strain measurements in the joint zone during subsequent component testing.

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“…Light will generate a loss in optical fiber, the main reasons for this loss are the transmission loss of optical fiber itself and the splice loss at fiber joints [1][2][3][4]. Reducing the splice loss of fiber joints can Increase fiber transmission distance and reduce the amount of attenuation of the fiber optic link, so it is important to increase the weld quality [5][6][7].…”

Section: Introduction: Research Purposementioning

confidence: 99%

Optimal FBG Sensor Installation Process for Crane SHM System

Wang¹,

Wang

Huang³

et al. 2013

AMM

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In order to improve the accuracy of measurement results, we should do our best to reduce the optical loss while welding FBG Sensors and adopt appropriate bonding technology. Taking simple tools and suitable approach can also achieve good result. We take three steps while welding FBG sensors, the steps are manufacture end face, welding, and heat shrinkable. Manufacturing end face of a fiber is the key step among them. It is important to adopt the sequence diagonal welding method and use a damp cloth to cool the other parts of the sensor while welding which can increase the accuracy of measurement. Use pen-made red light to check the fiber joints.

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Soldering fiber Bragg grating sensors for strain measurement

Cited by 5 publications

References 0 publications

Recent advances in optical fiber high-temperature sensors and encapsulation technique [Invited]

Recent advances in optical fiber high-temperature sensors and encapsulation technique [Invited]

Feasibility study of using integrated fiber optical sensors to monitor laser-assisted metal–polymer joining

Optimal FBG Sensor Installation Process for Crane SHM System

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