1. Theoretical Analysis and Sensing Technology of Electromagnetic Radiation Field
Where there is a current and voltage, there is an electromagnetic radiation field. The intensity distribution, polarization characteristics and spectral characteristics of the electromagnetic radiation field are related to the characteristics of the radiator itself. Through the measurement of the electromagnetic radiation field, many of the radiator's characteristics and working condition can be obtained. The electric field electromagnetic sensing technology is its core technology.
At present, the research group has a very good research foundation in the field of electric field sensor technology research. The research group uses a linear and nonlinear analytical method to analyze the detected signal of an ultra-wideband electric field probe; moreover, this group has designed a wide range of isotropic electric field probes. This kind of probe has a large dynamic range and is suitable for a variety of ground, aerospace, aerospace and marine applications, and its frequency can cover 10Hz to 40GHz. In addition, the research group also published many papers and obtained a number of patents. Figure 1 shows the electric field sensor with independent intellectual property rights.
[1] Broadband Isotropic Electric Field Detector based on the Koch Fractal Antenna. Guo, Hongfu; Hou, Huanan; Liu, Gaogao; Lv, Fusheng. Chinese invention patent, authorized, 2014.8.4, ZL201410379605.6
[2] Broadband Isotropic Field Intensity Detector. Guo, Hongfu; Hou, Huanan; Liu, Gaogao; Lv, Fusheng. Chinese utility model patent, authorized, 2014.8.4, ZL201420436774.4
Fig. 1. Electric field sensor with independent intellectual property rights
At present, the research group has developed non-contact detection technology for high voltage power lines in the field of electric field sensor application technology research. And this group has also conducted many researches in electromagnetic radiation and electromagnetic propagation analysis, and has published many high-quality papers and monographs.
[1] Non-contact Extra High Voltage Electroscope. Guo, Hongfu; Fu, Mi; Bai, Lina; Guo, Jinxi. Chinese invention patent, authorized, 2012.5.11, ZL201210146374.5
[2] Electrical Inspection Method for High Voltage Transmission Lines based on the Match between the Distribution Curves of the Electric Field Intensity Difference. Guo, Hongfu; Zhang, Fengxia; Gao, Guihua; Xing, Wenjie. Chinese invention patent, authorized, 2014.6.6, ZL201410249821.9
[3] Principle and Experiment of Wave Measurement. Guo, Hongfu. Xidian University Press, 450000, 2015.2
[4] ElectroMagnetic Waves: Transmission, Radiation and Propagation. Wang, Yiping; Guo, Hongfu. Xidian University Press, 441000, 2007.
2. Electromagnetic radiation field measurement and application technology
Based on the theory of electromagnetic radiation, the research group has conducted extensive research in the field of electric field electromagnetic measurement and application technology, such as electromagnetic environment assessment, electromagnetic compatibility analysis, non-contact high voltage detection technology and non-contact high-voltage electrical fault monitoring technology; These studies have a wide range of applications in the electronics, power, aerospace and other fields.
The research group has conducted a lot of research work on partial discharge measurement and fault monitoring technology for high-voltage electric power equipment. This group proposed an equivalent electromagnetic radiation model of a fractal antenna with an insulated discharge, simulated and analyzed the electromagnetic radiation characteristics and propagation characteristics of the partial discharge of the GIS, and the polarization characteristics of the electromagnetic wave during the radiation process, which is a partial discharge detection and fault of the GIS. The evaluation establishes a theoretical basis. Figure 2 shows the electromagnetic wave leakage characteristics of the GIS discharge. In addition, the research group published a number of high-quality papers in the research field and obtained a number of patents.Figure 2-3 shows the results of the team simulated GIS partial discharge electromagnetic wave leakage characteristics.
Fig. 2. Leaking characteristics for electromagnetic wave of GIS partial discharge
Fig. 3. Leaking polarization characteristics for electromagnetic wave of GIS partial discharge
[1] Simulation and Measurement of PD-induced Electromagnetic Wave Leakage in GIS with Metal Belt Guo, Hongfu; Lu, Fusheng; Ren, Kuan Fang IEEE Transactions on Dielectrics and Electrical Insulation, 2014.8, 21(4): 1942~1949 ; SCIE, SSCI, EI, ISTP
[2] Investigation on Polarization Characteristics of PD-induced Electromagnetic Wave Leakage in GIS with Metal Belt Guo, Hongfu; Qiu, Haoyuan; Yao, Lu; Huang, Fen; Ren, Kuan Fang IEEE Transactions on Dielectrics and Electrical Insulation, 2016.6, 23(3): 1475~1481 ; SCIE, SSCI, EI, ISTP
[3] Visualization software design for PD mapping based on C + + and Matlab Guo, Hongfu; Wang, Xunzhi; Tang, Jinfeng; Bai, Lina 2011 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference, CSQRWC 2011, Harbin, China, 2011.7.27-2011.7.30 ; EI
[4] The design of sensitive and wide dynamic range UHF PD detection sensor circuit Guo, Hongfu; Guo, Jinxi; Mei, Xiaoyun; Fu, Zuofeng 2nd Annual Conference on Electrical and Control Engineering, ICECE 2011, Yichang, China, 2011.9.16-2011.9.18 ; EI
[5] A design of ultrasonic detecting circuit on partial discharge Guo, Hongfu; Mei, Xiaoyun; Fu, Mi; Bai, Lina 2011 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference, CSQRWC 2011, Harbin, China, 2011.7.27-2011.7.30 ; EI
[6] Electromagnetic Leakage Characteristics Simulation of PD with the Specific Structure GIS Disc Insulator Guo Hongfu; Fu Mi; Tangjinfeng 10th International Symposium on Antennas, Propagation and EM Theory (ISAPE), Xi'an, China, 2012.10.22-2012.10.26 ; EI, ISTP
[7] Design of a new type of ultra wideband planar antenna Guo, Hongfu; Xu, Caixiang; Tang, Jinfeng 10th International Symposium on Antennas, Propagation and EM Theory (ISAPE), Xi'an, China, 2012.10.22-2012.10.26 ; EI
[8] A Study of the Effect of Absorbing Materials in the UHF Sensor Guo, Hongfu; Fu, Mi; Tang, Jinfeng; Xu, Caixiang 2nd International Conference on Advanced Engineering Materials and Technology (AEMT), Zhuhai, China, 2012.7.6-2012.7.8 ; EI
[9] Feature extraction based on the multiple harmonic analysis of 2-dimensional pattern of partial discharge Gong, Yulong; Guo, Jinxi; Guo, Hongfu International Conference on Sensors, Measurement and Intelligent Materials (ICSMIM 2012), Guilin, China, 2012.12.26-2012.12.27 ; EI
[10]The fractal model of discharge electromagnetic radiation establishment andsimulationHongfu Guo; Huanan Hou 2014 Cross Strait Quad‐Regional Radio Science and Wireless Technology Conference, CSQRWC2014，July 29‐August
This research group has a very good research base in the measurement of electromagnetic properties of liquid media and the application of research techniques. It has conducted a lot of research work, and has published many high-quality papers and obtained a number of patents.
[1] A cylindrical cavity sensor for liquid water content measurement Hongfu Guo; Lu Yao; Fen Huang Sensors and Actuators A: Physical, 2016.2.1, 238: 133~139 ; SCIE, SSCI, EI, ISTP
[2] A new measuring method of the relatively permittivity based on antenna's resonant characteristics. Guo, Hongfu; Xu, Chao; Xu, Caixiang; Gao, Guihua 2nd International Conference on Sensors, Measurement and Intelligent Materials (ICSMIM 2013), Guangzhou, China, 2013.11.16-2013.11.17
[3] The Influence of Antenna S11 Parameter on the Measurement of Medium Characteristics with Microwave Method Hong-Fu Guo; Fen Huang Cross Strait Quad-Regional Radio Wireless Conference 2015, 2015.8.12-2015.8.15
3. Electromagnetic wave measurement and signal processing method
A lot of research work has been done by this research group on the processing methods of electromagnetic wave measurement signals.
[1] Feature extraction based on the multiple harmonic analysis of 2-dimensional pattern of partial discharge Gong, Yulong; Guo, Jinxi; Guo, Hongfu International Conference on Sensors, Measurement and Intelligent Materials (ICSMIM 2012), Guilin, China, 2012.12.26-2012.12.27 ; EI
[2] A new method for sampling and processing power frequency signals, Hongfu Guo, Dajun feng, Lina Bai, Electronics Sci. & Tech. 2009, 12(12): 58-59.
