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IET International Radar Conference 2015

作者： Gu, Chengfei Chang, Wenge Li, Xiangyang Jia, Gaowei Liu, Zhaohe College of Electronic Science and Engineering National University of Defense Technology Changsha410073 China Science and Technology on Near-Surface Detection Laboratory Wuxi214000 China

ISBN: (纸本)9781849199940

This paper presents a compact Ku-band Frequency Modulated Continuous Wave Synthetic Aperture Radar (FMCW SAR) with the capability of real-time imaging. In this compact radar, an eight-core Digital Signal Processor (DSP) is used as the signal processing kernel. With the application of the high-performance processor, the efficiency is significantly improved. During the real-time imaging, the imaging algorithm is modularized, and each processing module of the imaging algorithm is efficiently realized in parallel. To demonstrate the high performance of the parallel processing, the ratio of speedup is analyzed specifically. Beneficial results have been achieved after times of airborne tests.

关键词： Synthetic aperture radar

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Bucking coil used in unexploded ordnance detection with transient electromagnetic system 4

Bucking coil used in unexploded ordnance detection with tran...

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4th IEEE Advanced Information technology, Electronic and Automation Control Conference, IAEAC 2019

作者： Jiang, Hejun Luan, Xinqun Hao, Jun Zhang, Shuang Chen, Shudong Science and Technology on Near-Surface Detection Laboratory Wuxi214035 China Jilin University College of Electronic Science and Engineering Changchun130012 China

ISBN: (纸本)9781728119076

Off-time response is usually measured by transient electromagnetic (TEM) system to detect subsurface targets. Compared with off-time response, on-time response of TEM system is more sensitive to high-conductivity targets, such as UXOs. However, it is difficult to obtain on-time response directly due to the strong primary field response. The key problem for on-time measurement is to eliminate the primary field response. Bucking coil is adopted here to compensation the primary field of transmitter coil at receiving coil for on-time response measuring. Firstly, the structure of the sensor with transmitting coil, bucking coil, and receiving coil is presented. Then, the primary field of transmitting coil and bucking coil at the position of receiving coil is calculated theoretically. With the side length of transmitting coil, bucking coil and the receiving coil fixed, the number of turns for transmitting coil and bucking coil are optimized for the best compensation. Calculated results show that the best compensation effect can reach 0.53%. Finally, the sensor with a transmitting coil (constructed with a side length and number of turns of 96 cm and 30, respectively), a bucking coil (constructed with a side length and number of turns of 26 cm and 8, respectively), and a receiving coil (constructed with a side length of 6 cm) was built. Measured results show that the primary field response after compensation is no more than 1% of the original response, and the maximum amplitude is only 0.4V. The on-time response of targets can be accurately recorded. © 2019 IEEE.

关键词： Transient analysis

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detection of UXO-like Targets with Portable Transient Electromagnetic System 4

Detection of UXO-like Targets with Portable Transient Electr...

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4th IEEE Advanced Information technology, Electronic and Automation Control Conference, IAEAC 2019

作者： Zhu, Jun Zhang, Haiyang Xu, Yuelin Qiu, Yu Zhang, Shuang Chen, Shudong Science and Technology on Near-Surface Detection Laboratory Wuxi214035 China Jilin University College of Electronic Science and Engineering Changchun130012 China

ISBN: (纸本)9781728119076

With the advantages of strong anti-interference ability and high spatial resolution, electromagnetic induction (EMI) has proven to be successful in unexploded ordnance (UXO detection. Portable transient electromagnetic system can work in a variety of complex conditions where the large and heavy vehicular systems cannot be readily used. The detection of UXO-like targets with portable transient electromagnetic (TEM) system is discussed detailed in this paper. Firstly, with description of the single dipole model for UXO response approximation, the location and characteristic response extraction for UXO-like targets is talked with the DE algorithm. Then, the improved sensor of the portable TEM system with a single-layered transmitting coil and five 3-component receiving coils is introduced. The transmitting coil is constructed with a diameter, number of turns, and transmitting current of 0.5 m, 30, and 5 A, respectively. The receiving coil is constructed with a length, number of turns, and resonant frequency of 6 cm, 600, and 180 kHz, respectively. Finally, 12 UXOs and 6 harmless targets buried in the area of 10 m × 6 m at different depths in different orientations have been detected with the improved portable TEM system. Target location and characteristic response have been estimated by DE algorithm with the measured response. The experimental results show that the high-quality data provided by the improved portable TEM system combined with the DE algorithm based on the dipole model can locate and characterize the separated targets accurately. Most of the position errors are within 10cm in x position and 5cm in depths for separated buried targets. For the multiple-targets buried together, the system can still locate and characterize the targets even if the response of two targets overlaps. © 2019 IEEE.

关键词： Electromagnetic induction

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UXO localization procedures applied to potable TEM sensor 4

UXO localization procedures applied to potable TEM sensor

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4th IEEE Advanced Information technology, Electronic and Automation Control Conference, IAEAC 2019

作者： Qiu, Yu Zhang, Shuang Chen, Shudong Luo, Chaopeng Jilin University College of Electronic Science and Engineering Changchun130012 China Science and Technology on Near-Surface Detection Laboratory Wuxi214035 China

ISBN: (纸本)9781728119076

Localization of unexploded ordnance (UXO) with transient electromagnetic (TEM) system is a principle and necessary problem in detection procedures, especially beset by low data diversity and high positioning uncertainty. In this paper, procedures for targets location are presented in detail with cued data collected by potable TEM sensor JPMD, which is designed to provide diverse time-domain data of high quality with one transmitter coil and five 3-component receiving coils. Based on the single dipole model, the target is located with the data collected at a single spatial point by the differential evolution (DE) optimization algorithm which can be subdivided into three steps. With the structure and parameters of JPMD sensors and data inversion process described briefly, a field test site of 5 m × 5 m measurement grid was conducted to present the specific UXO localization procedures at Jilin University. Results indicate that all the UXO-like targets can be detected distinctly with JPMD. The location of single object can be inversed rapid in tolerable error at one single point. For two objects with overlapping signals as one, the inverted horizontal position is basically in the middle of them and depth is a bit smaller than theory. © 2019 IEEE.

关键词： Electromagnetic induction

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RDSM: Underwater multi-AUV relay deployment and selection mechanism in 3D space

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Cognitive Robotics 2024年第1期4卷 204-216页

作者： Liu, Yafei Liu, Na Li, Hao Jiang, Yi zhu, Junwu CSSC Ocean Exploration Technology Institute Co. Ltd Jiangsu 214153 China College of Information Engineering Yangzhou University Jiangsu 225000 China Science and Technology on Near-Surface Detection Laboratory Jiangsu 214000 China

Underwater Wireless Sensor Networks (UWSNs) are widely used in naval military field and marine resource exploration. However, challenges such as resource inefficiency and unbalanced energy consumption severely hinder their practical applications. In this paper, we establish a model of underwater multi-hop wireless sensor network with multiple AUVs as relay nodes, which describes the data transmission process within the network. Based on this, an underwater multi-AUV Relay Deployment and Selection Mechanism in 3D space (RDSM) is proposed to achieve efficient underwater networking. Specifically, the RDSM includes the following key components. Firstly, an optimized relay node deployment strategy (RNDS) is used to deploy AUV nodes to effectively ensure network connectivity. Compared with traditional methods, this strategy has unique advantages in considering underwater space characteristics and can better adapt to the complex underwater environment. Secondly, a new utility function is constructed by integrating factors such as throughput, energy consumption, and load. The relay selection strategy based on utility maximization (RSS-UM) is used to select the next-hop relay node. This strategy is innovative in improving relay selection efficiency and optimizing network performance. Finally, in response to the problem of rapid energy consumption of relay nodes close to the base station, a power adjustment scheme is introduced to achieve a balance in node energy consumption, which is of great significance for prolonging network lifetime and improving overall stability. Experimental results show that compared with existing methods, the proposed mechanism achieves high utility and throughput, while maintaining balanced node energy consumption. © 2024

关键词： Sensor nodes

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Novel radome design for RF integration 4

Novel radome design for RF integration

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4th International Applied Computational Electromagnetics Society Symposium in China, ACES-China 2021

作者： Ren, Jinjing Zheng, Yezhen Jing, Shenhui Tang, Qi Research Center for Electromagnetic Environmental Effects Southeast University Nanjing China Science and Technology on Near-surface Detection Laboratory Wuxi China

ISBN: (纸本)9781733509619

RF integration is widely needed by modern shipborne radars. A novel dual-band FSS radome with mathrm{S}+mathrm{X} passband is designed and simulated with angular stability. The passband are 1.55~3.4GHz and 9.2~9.7GHz. This radome achieves good performance in the finite large FSS simulation and cylindrical radome simulation. © 2021 Applied Computational Electromagnetics Society (ACES).

关键词： Radomes

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Camouflaged target tracking based on a scale-adaptive correlation filter algorithm

Camouflaged target tracking based on a scale-adaptive correl...

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2021 China Automation Congress, CAC 2021

作者： Liu, Yang Wang, Congqing Zhou, Yongjun College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing China Science and Technology on Near-Surface Detection Laboratory Wuxi China

ISBN: (纸本)9781665426473

Catering the continuous development of intelligent technology and the wide application prospects of unmanned aerial vehicles (UAVs), the target tracking technology will be applied in future combat. In order to deal with the complex battlefield environment and the scale change of the target during tracking, an improved scale-adaptive correlation filter algorithm based on fusion features is proposed to realize the tracking of military personnel. First, the fast histogram of oriented gradient (FHOG) features and the local binary pattern (LBP) features are adaptively weighted and fused to achieve the target location. Then the translation filter of kernelized correlation filters(KCF) and the scale filter of discriminative scale space tracking(DSST) are combined to comprehensively improve the calculation speed and scale adaptation performance of the algorithm and track the target in time. The experimental results prove the robustness and practicability of the proposed method, which can accurately track military targets in real time. © 2021 IEEE

关键词： Local binary pattern

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Cascaded sliding window based real-time 3D region proposal for pedestrian detection

Cascaded sliding window based real-time 3D region proposal f...

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2019 IEEE International Conference on Robotics and Biomimetics, ROBIO 2019

作者： Hu, Jun Wu, Tao Fu, Hao Wang, Zhiyu Ding, Kai National University of Defense Technology College of Intelligence Science and Technology Changsha Hunan Province China Science and Technology on Near-Surface Detection Laboratory Wuxi Jiangsu Province China

ISBN: (纸本)9781728163215

Pedestrian detection is an indispensable technology for designing autonomous driving systems. This paper proposes a cascaded sliding window based real-time approach to generate 3D pedestrian proposals on point clouds only. After rasterizing the raw point cloud, a 3D sliding window is adopted to extract pedestrian candidates. Two features are proposed to improve the proposal performance. One is the central points density feature, which acts as a filter to speed up the process and reduce false alarms. The other is the location feature, including the density distribution and height difference distribution of the point cloud, which describes the profile and location of an object in a sliding window. The scores generated by this feature are then applied to non-maximum suppression (NMS) to remove sub-optimal boxes. Experiments on the KITTI 3D object detection benchmark show that our approach achieves state-of-the-art results among comparable methods, while maintaining the speed and accuracy trade-off. © 2019 IEEE.

关键词： Object detection

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Research on digital instantaneous frequency measurement based on passive positioning system 4

Research on digital instantaneous frequency measurement base...

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4th IEEE International Conference on Computer and Communications, ICCC 2018

作者： Yingjiao, Rong Wenfang, Lu Science and Technology on Near-Surface Detection Laboratory Wuxi China Yangzhou Baojun Subei Electronics Co. Ltd. Yangzhou China

ISBN: (纸本)9781538683392

The passive microwave detection and positioning technology is introduced into the low-altitude area alert and azimuth system for near-earth ground. The technique of single pulse orientation measurement receiver and digital instantaneous frequency measurement are used to locate the pulse description word (PDW) of the enemy target parameters. This paper studies an instantaneous frequency measurement technique using a seven-channel digital delay line frequency discriminating system in the frequency range of 8 to 18 GHz, and monitors and corrects the frequency measurement error caused by temperature in real time. Theoretically, it has a high accuracy of frequency measurement. © 2018 IEEE.

关键词： Broadband Delay line detection High accuracy Instantaneous frequency measurement Passive microwave positioning

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Gaussian Mixtures Match and Fusion Algorithms for Multi-Sensor Multi-Target Tracking 22

Gaussian Mixtures Match and Fusion Algorithms for Multi-Sens...

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22nd International Conference on Information Fusion, FUSION 2019

作者： Shen-Tu, Han Rong, Yingjiao Guo, Yunfei Luo, Ji-An Shi, Yifang Institution of Information and Control Hangzhou Dianzi University Hangzhou310018 China Science and Technology on Near-Surface Detection Laboratory Wuxi214035 China

ISBN: (纸本)9780996452786

The results of single sensor Gaussian Mixture PHD Tracker (GM-PHDT) will deteriorate when tracking targets in dense clutter and low detection rate environments. In this work, we propose three multi-sensor multi-target GM-PHD fusion algorithms. For the proposed algorithms, we obtain the multi-sensor posterior GMs by fusing the matched GMs from multiple sensors. Specifically, the GM matching and fusing methods are proposed to fullfill the applicable GM-PHD algorithms. The simulation results demonstrated the efficiency of the proposed algorithms. © 2019 ISIF-International Society of Information Fusion.

关键词： Target tracking

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