Effect of the spectral width of optical sources upon the output of an optical current sensor

Wang, Zheng Ping; Xiao-zhong, Wang; Liu, Xiaoyu; Ouyang, Chunmei; Tan, Qiao

doi:10.1088/0957-0233/16/8/007

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…Also, it was shown that the errors introduced by a small bandwidth optical source are very small and therefore it is reasonable to use the models which assume a monochromatic light source [38]. As in the all-fiber optic sensors, bulk-optic ones also have temperature dependency of the Verdet constant.…”

Section: Bulk-optic Current Sensorsmentioning

confidence: 99%

Optical Current Sensors for High Power Systems: A Review

et al. 2012

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Abstract:The intrinsic advantages of optical sensor technology are very appealing for high voltage applications and can become a valuable asset in a new generation of smart grids. In this paper the authors present a review of optical sensors technologies for electrical current metering in high voltage applications. A brief historical overview is given together with a more detailed focus on recent developments. Technologies addressed include all fiber sensors, bulk magneto-optical sensors, piezoelectric transducers, magnetic force sensors and hybrid sensors. The physical principles and main advantages and disadvantages are discussed. Configurations and strategies to overcome common problems, such as interference from external currents and magnetic fields induced linear birefringence and others are discussed. The state-of-the-art is presented including commercial available systems.

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Section: Bulk-optic Current Sensorsmentioning

confidence: 99%

Optical Current Sensors for High Power Systems: A Review

et al. 2012

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“…A more complex though efficient self‐healable system was obtained by Yang et al [ 31 ] They prepared a [CNT/EP/EMAA]s interleaf hierarchical structure composed by a CNT/EMAA membrane embedding EP phase into the columnar periodic porosity. Thanks to this structure, it was possible to self‐heal interface cracks within carbon fiber reinforced plastic (CFRP) by electrical‐heating the CNTs, without compromising the in‐plane strength.…”

Section: Self‐healing Materialsmentioning

confidence: 99%

A review on self‐healing polymers and polymer composites for structural applications

et al. 2022

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Polymer composites when employed for structural applications undergo dynamic stresses and strains that initiate fatigue‐induced microcracks, which by their coalescence cause the failure of the materials, thus limiting their service life. To overcome this hurdle, one of the recent approaches relies on the development of smart self‐healing polymers that, analogously to biological systems, can use damage as a trigger to activate the self‐repair phenomenon, thus extending their service life. This work reviews the self‐healing approach in polymer‐based materials for structural applications. It focuses on three main aspects, which are also explained with schematics that illustrate the mechanisms involved. The first aspect describes the different strategies adopted for self‐healing polymeric structures, the self‐healing agents used, as well as the reactions responsible for repairing the damage. The second part is focused on the methods used to disperse the self‐healing agents and catalysts within the polymer systems. The third section details the different self‐healing mechanisms and the effectiveness of self‐healing approaches in terms of mechanical and dynamical‐mechanical behavior of materials. Challenges and future research outlook highlighting the importance of relaxation time and fatigue characterization and to understand the mechanisms and possible improvements are also presented.

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“…The dominant source of dispersion is the wavelength dependence of the Verdet constant. It was theoretically proven that that the error accumulation due to spectral width variation is so small that it can be neglected, and a monochromatic model can be used even for broadband optical current sensors [Wang 2005].…”

Section: Bulk Magneto Optical Sensorsmentioning

confidence: 99%

Electric current sensors: a review

Ripka

2010

Meas. Sci. Technol.

222

125

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The paper makes a brief overview of traditional methods of measuremet of electric current and shows in more detail relatively new types of current sensors. These include Hall sensors with field concentrators, AMR current sensors, magnetooptical and superconducting current sensors. The influence of the magnetic core properties on the error of the current transformer shows why nanocrystalline materials are so advantageous for this application. Built-in CMOS current sensor are important tools for monitoring of the health of integrated circuits. Of special industrial value are current clamps which can be installed without breaking the measured conductor. Parameters of current sensors are also discussed, including geometrical selectivity. This parameter specific for current sensors means the ability to suppress the influence of currents external to the sensor (including the position of return conductor) and also suppress the influence on the position of the measured conductor with respect to the current.

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Effect of the spectral width of optical sources upon the output of an optical current sensor

Cited by 4 publications

References 8 publications

Optical Current Sensors for High Power Systems: A Review

Optical Current Sensors for High Power Systems: A Review

A review on self‐healing polymers and polymer composites for structural applications

Electric current sensors: a review

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