Optical power cable(OPC) current sensing models and experiments based on the optical transmission properties of magnetic fluids are proposed. Firstly, the models of OPC, magnetic fluid current sensor and OPC current s...Optical power cable(OPC) current sensing models and experiments based on the optical transmission properties of magnetic fluids are proposed. Firstly, the models of OPC, magnetic fluid current sensor and OPC current sensing are established. Secondly, the relationship between the magnetic field and the current of the OPC is demonstrated. Finally, the relationship between the optical transmission properties of magnetic fluids and the OPC current is studied. The results show that there is a good linear relationship between the transmitted power and the current of the OPC.展开更多
Distributed optical fiber sensor based on Brillouin scat- tering was fn＇st proposed by Farahi et al in 1989[1], and has attracted intense interest due to the potential applica- tion in monitoring large civil structur...Distributed optical fiber sensor based on Brillouin scat- tering was fn＇st proposed by Farahi et al in 1989[1], and has attracted intense interest due to the potential applica- tion in monitoring large civil structures, power cables, oil and gas pipelines and geological disaster[2＇3]. One of the subjects mainly investigated is Brillouin optical time domain reflectometer （BOTDR） for single-fiber-ended measurement only and simple implementation. The backscattered spontaneous light is used to measure the round-trip time of optical pulses entering into the sens- ing fiber and the optical intensity at each sampling point. By analyzing the measured round-trip time and the spon- taneous Brillouin intensity, the distributed physical quantities, such as temperature and strain, can be ob- tained [4,5].展开更多
基金supported by the National Natural Science Foundation of China(Nos.61775057 and 61377088)the Hebei Province Science and Technology Support Program(No.15212103D)。
文摘Optical power cable(OPC) current sensing models and experiments based on the optical transmission properties of magnetic fluids are proposed. Firstly, the models of OPC, magnetic fluid current sensor and OPC current sensing are established. Secondly, the relationship between the magnetic field and the current of the OPC is demonstrated. Finally, the relationship between the optical transmission properties of magnetic fluids and the OPC current is studied. The results show that there is a good linear relationship between the transmitted power and the current of the OPC.
基金supported by the National Natural Science Foundation of China(No.61775057)the Natural Science Foundation of Hebei Province of China(Nos.E2015502053 and F2015502059)
文摘Distributed optical fiber sensor based on Brillouin scat- tering was fn＇st proposed by Farahi et al in 1989[1], and has attracted intense interest due to the potential applica- tion in monitoring large civil structures, power cables, oil and gas pipelines and geological disaster[2＇3]. One of the subjects mainly investigated is Brillouin optical time domain reflectometer （BOTDR） for single-fiber-ended measurement only and simple implementation. The backscattered spontaneous light is used to measure the round-trip time of optical pulses entering into the sens- ing fiber and the optical intensity at each sampling point. By analyzing the measured round-trip time and the spon- taneous Brillouin intensity, the distributed physical quantities, such as temperature and strain, can be ob- tained [4,5].
