Fiber optic sensors for the monitoring of cryogenic spacecraft tank structures

Latka, Ines; Ecke, Wolfgang; H÷fer, Bernd; Chojetzki, Christoph; Reutlinger, Arnd

doi:10.1117/12.567353

Cited by 22 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An example of such a transducer is a Palladium coating placed around the fiber in the region of the grating. Palladium is known to expand in the presence of hydrogen gas and thus the concentration of hydrogen around the fiber can be measured [9]. Other parameters that can be measured include pressure and acceleration [10,11].…”

Section: Fiber Bragg Gratingsmentioning

confidence: 99%

Fiber Optic Sensing in Spacecraft Engineering: An Historical Perspective From the European Space Agency

McKenzie

Ibrahim²,

Haddad

et al. 2021

Front. Phys.

View full text Add to dashboard Cite

For over two decades the European Space Agency has investigated the possibility of using fiber optic sensors in spacecraft engineering as tools to advance the monitoring and control of spacecraft. The applications have been diverse covering both launcher and satellite applications and encompassing environments from cryogenic to high temperature re-entry applications. The aim of this review is to capture the history and status of fiber optic sensors for space applications demonstrating the breadth of applications that have been studied and the lessons learnt along the way. Finally, it is the intention of this review to look forward, pointing to how this technology can be used in the future and identifying what are the key remaining challenges to its further successful exploitation.

show abstract

Section: Fiber Bragg Gratingsmentioning

confidence: 99%

Fiber Optic Sensing in Spacecraft Engineering: An Historical Perspective From the European Space Agency

McKenzie

Ibrahim²,

Haddad

et al. 2021

Front. Phys.

View full text Add to dashboard Cite

show abstract

“…For laboratory investigations, the polarised light has been adjusted using rotating fibre coils to a polarisation state at the sensor site, which is characterised by minimum transmitted light intensity. For prototype configuration, a polarisation-stable FBG sensor network has been prepared from polarisation maintaining fibre and fibre-optic components, and highbirefringent D-shaped fibre as sensor element [15]. For optimisation of the reflected intensity, the evanescent field interaction length has to be limited in any case to about 1.5 mm, with the position of the FBG exactly at the same place.…”

Section: Methodsmentioning

confidence: 99%

Opto-chemical fibre Bragg grating sensors based on evanescent field interaction with specific transducer layers

Ecke¹,

Schroeder²,

Bierschenk³

et al. 2005

SPIE Proceedings

Self Cite

View full text Add to dashboard Cite

Fibre side-polishing technology allows for refractive index measurements using optical fibre Bragg grating sensors. Evanescent field interaction between the guided fibre light mode and the analyte near to the core of the side-polished optical fibre yields a Bragg wavelength shift in dependence on the refractive index of the analyte. This refractometric sensor technique has been extended to opto-chemical measurements with specific sensitivity using transducer layers with selective absorption properties deposited on the side-polished fibre core region. Experimental results are presented for the case of a hydrogen gas sensor (palladium transducer) and a pH sensor (polyaniline transducer).

show abstract

“…On the other hand, some particular interests are extreme low temperature as low as a few Kelvin environment, for example, helium or hydrogen gas leak detection in cryogenic condition is critically important in the production and use of liquid fuels. Other applications in aerospace vehicles, superconducting magnets, and high-energy physics experiments also involve advanced technologies and devices designed to operate in cryogenic environments [ 13 , 14 , 15 , 16 , 17 ]. In 2019, the National High Magnetic Field Laboratory of USA used hybrid superconducting magnets to achieve the highest magnetic field of 45.5T to date [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Strain Transfer Characteristics of Multi-Layer Optical Fiber Sensors with Temperature-Dependent Properties at Low Temperature

Yang

Wang

2021

Sensors

View full text Add to dashboard Cite

Optical fiber sensors have been potentially expected to apply in the extreme environment for their advantages of measurement in a large temperature range. The packaging measure which makes the strain sensing fiber survive in these harsh conditions will commonly introduce inevitable strain transfer errors. In this paper, the strain transfer characteristics of a multi-layer optical fiber sensing structure working at cryogenic environment with temperature gradients have been investigated theoretically. A generalized three-layer shear lag model incorporating with temperature-dependent properties of layers was developed. The strain transfer relationship between the optical fiber core and the matrix has been derived in form of a second-order ordinary differential equation (ODE) with variable coefficients, where the Young’s modulus and the coefficients of thermal expansion (CTE) are considered as functions of temperature. The strain transfer characteristics of the optical sensing structure were captured by solving the ODE boundary problems for cryogenic temperature loads. Case studies of the cooling process from room temperature to some certain low temperatures and gradient temperature loads for different low-temperature zones were addressed. The results showed that different temperature load configurations cause different strain transfer error features which can be described by the proposed model. The protective layer always plays a main role, and the optimization geometrical parameters should be carefully designed. To verify the theoretical predictions, an experiment study on the thermal strain measurement of an aluminum bar with optical fiber sensors was conducted. LUNA ODiSI 6100 integrator was used to measure the Rayleigh backscattering spectra shift of the optical fiber at a uniform temperature and a gradient temperature under liquid nitrogen temperature zone, and a reasonable agreement with the theory was presented.

show abstract

Fiber optic sensors for the monitoring of cryogenic spacecraft tank structures

Cited by 22 publications

References 0 publications

Fiber Optic Sensing in Spacecraft Engineering: An Historical Perspective From the European Space Agency

Fiber Optic Sensing in Spacecraft Engineering: An Historical Perspective From the European Space Agency

Opto-chemical fibre Bragg grating sensors based on evanescent field interaction with specific transducer layers

Strain Transfer Characteristics of Multi-Layer Optical Fiber Sensors with Temperature-Dependent Properties at Low Temperature

Contact Info

Product

Resources

About