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学者姓名:谢楠
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During the inspection of transmission lines by unmanned aerial vehicle (UAV), the captured images are typically transmitted to the cloud for processing, and currently, online detection cannot be performed locally on the UAV. This paper proposes a lightweight model based on an improved wavelet scattering convolutional network that enables local online identification of defects and foreign objects on edge devices. This lightweight model comprises an improved wavelet scattering network and a small convolutional neural network (CNN). The improved wavelet scattering network is more flexible than the classical network and can effectively extract the key features of the picture; The small CNN is divided into two parts: a four-layer convolutional network section for further extraction of small target features, and a three-layer fully connected for feature recognition and classification. Experimental results demonstrate that this lightweight model exhibits strong generalization and real-time performance, with accuracy rates for defect and foreign object identification exceeding 90%. The recognition speed is three times faster than that of YOLOv5s and nearly four times faster than YOLOv8s. The recognition speed on various edge devices exceeds 30 frames per second (FPS), meeting the 30FPS of UAV-captured videos, and reaching up to 153.8 FPS on Orange Pi 5B, enabling local online detection frame by frame. © 2025 IEEE.
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GB/T 7714 | He, Zhichao , Zhang, Yong , Shen, Xiangyu et al. Online Recognition of Defects and Foreign Objects Based on Wavelet Scattering Convolutional Networks [C] . 2025 : 1057-1061 . |
MLA | He, Zhichao et al. "Online Recognition of Defects and Foreign Objects Based on Wavelet Scattering Convolutional Networks" . (2025) : 1057-1061 . |
APA | He, Zhichao , Zhang, Yong , Shen, Xiangyu , Xie, Nan . Online Recognition of Defects and Foreign Objects Based on Wavelet Scattering Convolutional Networks . (2025) : 1057-1061 . |
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To enhance the electromagnetic protection performance of ultra-low power Electronic Current Transformer (ECT), a damping oscillatory wave (DOW) disturbance test is conducted on it. A method for generating parallel resonant DOWs is proposed, which involves two-stage following and amplification of the initial waveform, enabling a maximum voltage of over 12V. Finally, considering the characteristics of the output signal from the four-level encoding module of ultra-low power ECT, electromagnetic interference countermeasures combining Transient Voltage Suppressor diodes with RC low-pass filters are proposed. Experimental results show that the four-level encoding module is extremely sensitive to voltage fluctuations due to the nonlinear relationship between the voltage and current of the LED. The normal operation of the four-level encoding module can be ensured through anti-interference measures. © 2025 IEEE.
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GB/T 7714 | Zhang, Yong , He, Zhichao , Shen, Xiangyu et al. Electro Magnetic Compatibility Analysis of Signal Interference on Ultra-Low Power Four-Level ECT [C] . 2025 : 716-720 . |
MLA | Zhang, Yong et al. "Electro Magnetic Compatibility Analysis of Signal Interference on Ultra-Low Power Four-Level ECT" . (2025) : 716-720 . |
APA | Zhang, Yong , He, Zhichao , Shen, Xiangyu , Xie, Nan . Electro Magnetic Compatibility Analysis of Signal Interference on Ultra-Low Power Four-Level ECT . (2025) : 716-720 . |
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This paper proposes a non-contact measurement technique for the voltage of three-phase cables. The technique initially constructs an optimized analytical calculation model for the electric field distribution of three-phase cables. Subsequently, by combining measured electric field data from an array-type capacitive sensor and utilizing the potential coefficient matrix obtained through physical calculations, it enables precise determination of the voltages on the three-phase conductors. The maximum error does not exceed 3.3%. © 2025 IEEE.
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GB/T 7714 | Shen, Xiangyu , Xu, Yihang , Zhuang, Weijian et al. A Non-Contact Voltage Measurement Technology for Three-Phase Cables [C] . 2025 : 676-679 . |
MLA | Shen, Xiangyu et al. "A Non-Contact Voltage Measurement Technology for Three-Phase Cables" . (2025) : 676-679 . |
APA | Shen, Xiangyu , Xu, Yihang , Zhuang, Weijian , Xie, Nan . A Non-Contact Voltage Measurement Technology for Three-Phase Cables . (2025) : 676-679 . |
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The existing busbar energy extraction and laser energy supply methods on the high-voltage side of a light-transmitting current transformer suffer from the problems of power supply dead zones, low energy conversion efficiency, and insufficient service life. Thus an ultra-low power optoelectronic transmission system scheme based on four-level coding and weak light communication is proposed. First, a three-state gate circuit is designed to encode the sampling clock and data signal of the signal sampling module into a four-level signal. Then, the four-level signal is converted into an optical signal and transmitted to the low-voltage side through an optical fiber using an ultra-high brightness and ultra-low power LED. Finally, the signal is decoded at the low voltage side using a high-sensitivity avalanche photodiode detector for weak light detection and then input to the decoding circuit. The ultra-low power system is applied to the light-transmitting current transformer for experimental verification. The results show that it can meet the requirements of 0.2-level accuracy, and the average power consumption of the high-voltage side can be reduced to 3.91 mW. Because of the ultra-low power consumption of the system, the high-voltage side can adopt a reliable energy supply scheme such as a large-capacity battery or low-power photovoltaic system. This solves the problem of power supply and improves stability and reliability. © 2024 Power System Protection and Control Press. All rights reserved.
Keyword :
Decoding Decoding Electric currents Electric currents Electric instrument transformers Electric instrument transformers Electric power transmission Electric power transmission Electric power utilization Electric power utilization Energy conversion efficiency Energy conversion efficiency Energy resources Energy resources Signal sampling Signal sampling Silicon Silicon
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GB/T 7714 | Xu, Wenhao , Xu, Qifeng , Xie, Nan . An ultra-low power optical current transformer based on four-level coding and weak-light communication [J]. | Power System Protection and Control , 2024 , 52 (5) : 148-157 . |
MLA | Xu, Wenhao et al. "An ultra-low power optical current transformer based on four-level coding and weak-light communication" . | Power System Protection and Control 52 . 5 (2024) : 148-157 . |
APA | Xu, Wenhao , Xu, Qifeng , Xie, Nan . An ultra-low power optical current transformer based on four-level coding and weak-light communication . | Power System Protection and Control , 2024 , 52 (5) , 148-157 . |
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Dirac degeneracy is a fourfold band crossing point in a threedimensional momentum space, which possesses Fermi-arc-like surface states, and has extensive application prospects. In this work, we systematically study the exceptional effects of the robust chiral surface wave supported by photonic Dirac semimetal acts on the dielectric particles. Theoretical results show that orthogonal electromagnetic modes and helical or chiral whispering gallery modes (WGMs) of dielectric particles can be efficiently excited by the unidirectional spin-polarized surface wave. More importantly, optical forces exerted by the spin-polarized surface wave exhibit chirality-dependent symmetric behavior and high chiral Q factor with precise size selectivity. Our findings may provide potential applications in the area of chiral microcavity, spin optical devices, and optical manipulations. (c) 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.
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GB/T 7714 | Zhao, Yu , Chan, Hsun-Chi , Bi, Ke et al. Chiral whispering gallery modes and chirality-dependent symmetric optical force induced by a spin-polarized surface wave of photonic Dirac semimetal [J]. | OPTICS LETTERS , 2024 , 49 (15) : 4306-4309 . |
MLA | Zhao, Yu et al. "Chiral whispering gallery modes and chirality-dependent symmetric optical force induced by a spin-polarized surface wave of photonic Dirac semimetal" . | OPTICS LETTERS 49 . 15 (2024) : 4306-4309 . |
APA | Zhao, Yu , Chan, Hsun-Chi , Bi, Ke , Duan, Gaoyan , Liu, Maoxin , Xie, Nan et al. Chiral whispering gallery modes and chirality-dependent symmetric optical force induced by a spin-polarized surface wave of photonic Dirac semimetal . | OPTICS LETTERS , 2024 , 49 (15) , 4306-4309 . |
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An optical voltage sensor with an arbitrary electric field direction modulation (AEFDM) mode is proposed to increase the half-wave voltage. The mode is realized by heterogeneous electrodes arranged in a center-symmetric way, and generates an electric field with a direction at an arbitrary angle to the light propagation direction. The finite element method and coupling wave theory are used to design and optimize the electrodes and field distribution. The experimental results show that heterogeneous electrodes and AEFDM mode are able to regulate the sensor's half-wave voltage in a range from 1 to 30 times (47-1409 kV), with 0.5 class accuracy and 99.99% linearity. This novel AEFDM method proposes a new electrode shape and position, reducing temperature drift to 50% compared to solid-state voltage divider method.
Keyword :
arbitrary- electric-field-direction-modulation arbitrary- electric-field-direction-modulation half-wave voltage half-wave voltage heterogeneous electrodes heterogeneous electrodes optical voltage sensor optical voltage sensor
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GB/T 7714 | Lin, Yifan , Xu, Qifeng , Li, Jun et al. Half-wave voltage controllable optical voltage sensor with arbitrary electric field direction modulation [J]. | MEASUREMENT SCIENCE AND TECHNOLOGY , 2024 , 35 (10) . |
MLA | Lin, Yifan et al. "Half-wave voltage controllable optical voltage sensor with arbitrary electric field direction modulation" . | MEASUREMENT SCIENCE AND TECHNOLOGY 35 . 10 (2024) . |
APA | Lin, Yifan , Xu, Qifeng , Li, Jun , Xie, Nan , Yang, Yang . Half-wave voltage controllable optical voltage sensor with arbitrary electric field direction modulation . | MEASUREMENT SCIENCE AND TECHNOLOGY , 2024 , 35 (10) . |
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In order to solve the problem of energy supply on the high voltage side of the active electronic current transformer (ECT), a signal coding method based on a three-state gate circuit is proposed. The sampling clock signal and sampling data signal of the analog-to-digital converter (ADC) are encoded as a four-level signal by the three-state gate circuit, and then directly drive the ultra-high-brightness LED to be converted into optical signals and transmitted to the low-voltage side for decoding. This method requires only a one-way photoelectric transmission system to realize three-wire SPI communication, which can reduce the power consumption of the high-voltage side to less than 5mW, so it can be selected as a disposable high-capacity battery power supply to solve the problem of the high-voltage side of the energy supply. In addition, for the problem of four-level signal distortion affecting signal recognition and decoding found in the experiment, a recognition method based on support vector machine (SVM) is proposed. The results show that the recognition correct rate can reach 99.25%, and the recognition of a single pulse takes only 11.46μs, which can meet the signal recognition requirements of ECT. © 2023 IEEE.
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GB/T 7714 | Xu, Wenhao , Zhang, Yong , Xie, Nan . Signal Coding and Recognizing Method Based on Three-State Gate Circuit and Support Vector Machine [C] . 2023 : 721-725 . |
MLA | Xu, Wenhao et al. "Signal Coding and Recognizing Method Based on Three-State Gate Circuit and Support Vector Machine" . (2023) : 721-725 . |
APA | Xu, Wenhao , Zhang, Yong , Xie, Nan . Signal Coding and Recognizing Method Based on Three-State Gate Circuit and Support Vector Machine . (2023) : 721-725 . |
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Existing IOT communication protocols such as MQTT(Message Queuing Telemetry Transport) and CoAP(Constrained Application Protocol) cannot meet the requirements of high reliability and real-time performance for the power system. To solve the problem, this paper proposes a reduced IEC61850 9-2SV (Sample Value) protocol for the IOT controller, ensuring high sample time for ADC and high transmission frequency of IOT devices. The protocol simplifies and trims some parameters, and changes the floating-point value into integer data. To decrease the burden of WIFI transmission, we proposed the bundle message and replacement message. The former bundle several sample value at the different time stamp and transmit them just in one payload. The latter tells the receiver how to replace some information in the former message to get a new one. The experiment shows the maximum transmittance frequency of SV messages could be considered as a constant, 1/15us. The bundle number has a linear relationship with maximum transmission bits per second and maximum sample rate. When bundling 45 sample values in one payload, the maximum transmission rate is 163.2 Mbps. © 2022 IEEE.
Keyword :
Digital arithmetic Digital arithmetic Electric power transmission Electric power transmission Internet of things Internet of things
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GB/T 7714 | Lin, Yifan , Xie, Nan . IEC61850 Sample Value Service Based on Reduced Application Service Data Unit for Energy IOT [C] . 2022 : 542-547 . |
MLA | Lin, Yifan et al. "IEC61850 Sample Value Service Based on Reduced Application Service Data Unit for Energy IOT" . (2022) : 542-547 . |
APA | Lin, Yifan , Xie, Nan . IEC61850 Sample Value Service Based on Reduced Application Service Data Unit for Energy IOT . (2022) : 542-547 . |
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Temperature, stress birefringence and low frequency vibration have a negative impact on the long-term operation instability of optical voltage sensors (OVS), resulting in large random and fluctuate errors in the output signal. In order to suppress the error, this paper developed a method based on electrical field modulation with high-speed rotating isomerism electrodes and the digital lock-in amplifier technology. This method can shift the frequency band of the measured signal to 2kHz, avoiding the low-frequency ( © 2022 IEEE.
Keyword :
Birefringence Birefringence Electric fields Electric fields Electrodes Electrodes Isomers Isomers Locks (fasteners) Locks (fasteners) Random errors Random errors Stereochemistry Stereochemistry
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GB/T 7714 | Li, Jun , Lin, Yifan , Xie, Nan . Design of optical voltage sensor based on electric field regulation and rotating isomerism electrode [C] . 2022 . |
MLA | Li, Jun et al. "Design of optical voltage sensor based on electric field regulation and rotating isomerism electrode" . (2022) . |
APA | Li, Jun , Lin, Yifan , Xie, Nan . Design of optical voltage sensor based on electric field regulation and rotating isomerism electrode . (2022) . |
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To achieve linear measurement of electro-optic phase delay and improve the accuracy and measurement range of the optical voltage transducer (OVT), this paper proposes a linear phase delay detection method for an optical voltage transformer based on a strip S-wave plate. Using the strip S-wave plate, the phase delay can be directly converted into the displacement of the dark stripe of the strip spot, and the displacement is located by the dual-quadrant detector. Using the Jones matrix, we confirm the linear relationship between the position of the dark stripe and the phase delay, and propose a positioning method and error compensation scheme of the dark stripe and set up an experimental system to verify its performance. The experimental results show that the OVT realizes the measurement of the electro-optic phase delay; the measuring range of the phase delay is up to +/- 40 degrees, and the measurement error is less than 0.5%.
Keyword :
linear measurement linear measurement optical voltage transducer optical voltage transducer S-wave plate S-wave plate the phase delay of electro-optic crystal the phase delay of electro-optic crystal
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GB/T 7714 | Xie, Nan , Zhu, Defeng , Xu, Qifeng et al. Linear phase delay detection method for optical voltage transformer based on S-wave plate [J]. | MEASUREMENT SCIENCE AND TECHNOLOGY , 2021 , 32 (8) . |
MLA | Xie, Nan et al. "Linear phase delay detection method for optical voltage transformer based on S-wave plate" . | MEASUREMENT SCIENCE AND TECHNOLOGY 32 . 8 (2021) . |
APA | Xie, Nan , Zhu, Defeng , Xu, Qifeng , Tan, Qiao . Linear phase delay detection method for optical voltage transformer based on S-wave plate . | MEASUREMENT SCIENCE AND TECHNOLOGY , 2021 , 32 (8) . |
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