Fiber Bragg grating cavity sensor for simultaneous measurement of strain and temperature

Du, Weichong; Tao, Xiaoming; Tam, Hwa Yaw

doi:10.1109/68.736409

Cited by 151 publications

(24 citation statements)

References 7 publications

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“…This makes it possible to perform measurements at different locations along the fiber length. In addition, the Bragg wavelength favourably shifts linearly with temperature [241]. A typical example of this linear wavelength shift is shown in Fig.…”

Section: Fiber Bragg-grating Sensorsmentioning

confidence: 82%

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A review on various temperature-indication methods for Li-ion batteries

et al. 2019

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Temperature measurements of Li-ion batteries are important for assisting Battery Management Systems in controlling highly relevant states, such as State-of-Charge and State-of-Health. In addition, temperature measurements are essential to prevent dangerous situations and to maximize the performance and cycle life of batteries. However, due to thermal gradients, which might quickly develop during operation, fast and accurate temperature measurements can be rather challenging. For a proper selection of the temperature measurement method, aspects such as measurement range, accuracy, resolution, and costs of the method are important. After providing a brief overview of the working principle of Li-ion batteries, including the heat generation principles and possible consequences, this review gives a comprehensive overview of various temperature measurement methods that can be used for temperature indication of Li-ion batteries. At present, traditional temperature measurement methods, such as thermistors and thermocouples, are extensively used. Several recently introduced methods, such as impedance-based temperature indication and fiber Bragg-grating techniques, are under investigation in order to determine if those are suitable for largescale introduction in sophisticated battery-powered applications.

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Section: Fiber Bragg-grating Sensorsmentioning

confidence: 82%

“…[239]. [241,243]. A typical value for temperature sensitivity is a wavelength shift of 10 pm/ o C [237,239].…”

Section: Fiber Bragg-grating Sensorsmentioning

confidence: 99%

A review on various temperature-indication methods for Li-ion batteries

et al. 2019

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“…FBGs combined with FPIs usually to provide opportunities for measurements of parameters that involve combinations of pressure and temperature, 90,91 strain and temperature, [92][93][94][95] and RI and temperature. [96][97][98][99][100] FP cavities are especially convenient for the design of pressure-sensitive sensor sections and are often realized in different configurations.…”

Section: Multiparameter Sensors Based On Combinations Of Fbg/lpfbgs Amentioning

confidence: 99%

“…A combined strain-temperature sensor can be realized in this way, as described in Ref. 92. A similar approach can also be used to build a sensor for pressure and temperature sensing.…”

Section: Multiparameter Sensors Based On Combinations Of Fbg/lpfbgs Amentioning

confidence: 99%

Multiparameter fiber-optic sensors: a review

2019

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Needs for sensor miniaturization, versatile sensing solutions, and improved measurements' performances in difficult operating environments have recently driven considerable research in optical fiber sensor for multiparameter measurements. Multiparameter sensors not only enable new sensors' functionalities, but can also improve achievable measurement performances for some frequently measured parameters considerably. This study provides a review of work in the field of miniature fiber-optic sensors that allows independent and simultaneous measurements of two or more different physical or chemical parameters. Sensor designs and corresponding signal processing schemes are reviewed and compared.

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“…However, Bragg wavelength is sensitive to strain and temperature simultaneously, which limits its applications. In order to overcome the cross-sensitivity, some solutions [2][3][4][5] have been proposed, most of which used several FBGs and some required two demodulation systems. These bring application inconvenience and considerable cost.…”

mentioning

confidence: 99%

Simultaneous sensing of displacement and temperature with a single FBG

Wei

Qiao

Jia

2011

Optoelectron. Lett.

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A novel fiber Bragg grating (FBG) sensor with simultaneous sensing of displacement and temperature is presented. The FBG is affixed on the cantilever inclinedly. The midpoint of FBG exactly coincides with the zero strain layer of a rectangular beam. The vertical displacement can be measured by the broadened bandwidth of FBG as the bandwidth is insensitive to temperature, while the temperature can be measured by the center wavelength shift as the wavelength shift is insensitive to vertical displacement. With 0.1 nm spectral resolution of the analyzer, sensitivities of bandwidth-displacement and center wavelength-temperature are 0.48 nm/mm and 0.05 nm/ o C, resolutions are 0.2 mm and 2.0 o C, and sensing ranges of displacement and temperature are up to 8.5 mm and 45 o C respectively. Experimental results match theoretical analyses very well.The fiber Bragg grating (FBG) is a new type of passive optical devices [1] , by which physical quantities, such as strain, stress, displacement and temperature can be precisely measured. However, Bragg wavelength is sensitive to strain and temperature simultaneously, which limits its applications. In order to overcome the cross-sensitivity, some solutions [2][3][4][5] have been proposed, most of which used several FBGs and some required two demodulation systems. These bring application inconvenience and considerable cost.Based on the FBG chirped effect and cantilever beam scheme [6,7] , a novel simultaneous sensor is proposed: the vertical displacement can be measured by the broadened bandwidth of FBG as bandwidth is insensitive to temperature, while the temperature can be measured by the center wavelength shift of FBG as wavelength shift is insensitive to vertical displacement. The simultaneous sensing is analyzed theoretically, and a highly linear response is obtained in experiment, which is expected for practical applications in optical fiber sensing field.The reflected bandwidth of FBG varies with the displacement of cantilever and is insensitive to temperature. The basic principle is shown in Fig.1.The research shows that when the temperature remains a constant, the relationship between center wavelength variation of FBG c ' c and the axial strain ax is given by [8] ,(1) c ax c ' c K where ax is axial strain on FBG, ' c is the center wavelength after exerting strain ax on FBG, c is the initial center wavelength, and 78 . 0 K [8] is the strain sensitivity coefficient. We can effectively modulate the reflected chirped bandwidth by exerting a gradient strain on axes of FBG, which will produce FBG's grids gradient variation. By choosing the suitable material, which possesses greater thermal expansion coefficient and better flexibility, a cantilever beam is designed as shown in Fig.1. The cantilever is a rectangular beam, one end of which is fixed and the other end is free. The FBG is inclined to be sticked on one side of the cantilever beam, and the angle between FBG's axes and cantilever's zero strain layer is = 45 o . To ensure that the reflected spectrum is broadened towards...

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Fiber Bragg grating cavity sensor for simultaneous measurement of strain and temperature

Cited by 151 publications

References 7 publications

A review on various temperature-indication methods for Li-ion batteries

A review on various temperature-indication methods for Li-ion batteries

Multiparameter fiber-optic sensors: a review

Simultaneous sensing of displacement and temperature with a single FBG

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