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9th Symposium on Novel Photoelectronic Detection technology and Applications

作者： Shuai, Chen Mingkai, Yue Huimin, Chen School of Equipment Engineering Shenyang Ligong University Liaoning Shenyang110159 China Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing100081 China

ISBN: (纸本)9781510664432

In order to analyze the backscattering characteristics of pulsed laser fuze in typical smoke, copper powder and iron powder with a particle size range of 3~15 µm were selected, the detection model of pulsed laser fuzes in typical smoke was established based on Mie scattering theory and Monte Carlo method. The pulsed laser fuze is simulated to scatter echoes behind smoke curtains with different detection distances, different smoke screen thicknesses and different emitting laser pulse widths, and the echo intensities of copper powder smoke screens and iron powder smoke screens under the same smoke screen conditions are compared. The results show that the normalized echo intensity of copper powder smoke screen and iron powder smoke screen is negatively correlated with the detection distance. It is positively correlated with smoke screen thickness and emitted laser pulse width. In addition, under the same smoke screen environmental conditions, the echo intensity of the iron powder smoke screen is significantly stronger than that of the copper powder smoke screen, which can be explained that compared with the iron powder, copper powder is more suitable for use as a smoke generator material, the result can provide support for the anti-smoke interference of the laser fuze. © 2023 SPIE.

关键词： Particle size

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dynamic Accuracy Method of laser imaging system Based on MEMS mirror 3

Dynamic Accuracy Method of laser imaging system Based on MEM...

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3rd International Conference on Machine Learning and Computer Application, ICMLCA 2022

作者： Zhang, Jun Yang, Li Chen, Huimin School of Equipment Engineering Shenyang Ligong University Liaoning Shenyang110159 China Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing100081 China

ISBN: (纸本)9781510664814

As one of the important ways of laser imaging, Microelectromechanical system (MEMS)-based mirror imaging has the advantages of small volume and high frequency. In this paper, the relationship between key parameters of MEMS mirrors is studied. Also, the realization method of scanning imaging based on a one-dimensional MEMS mirror is studied. A method of controlling the number of scanning harnesses based on a MEMS mirror is proposed. The single-lens method is used to design and collimate the transmitting optical system with Zemax simulation software, and the effects of the different numbers of scanning wire harnesses are simulated. The result shows that the number of scanning wire harnesses can be controlled, indicating that the system's dynamic accuracy can be achieved. © 2023 SPIE.

关键词： MEMS

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Current status and trends in the study of penetration fuze initiation control methods

Current status and trends in the study of penetration fuze i...

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2023 International Conference on Automation control, Algorithm, and Intelligent Bionics, ACAIB 2023

作者： Lu, Ying Sui, Li Wang, Dongya Shi, Gengchen Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing100081 China Northwest Industries Group Co. Ltd. Xi’an710043 China

ISBN: (纸本)9781510667662

With the development of the times, the concept of modern warfare is constantly changing and precision strikes have become an important mode and means of combat on the modern battlefield. It is of great strategic value to research and realise hard target penetration munitions that can strike accurately and effectively destroy high-value targets. The key to the efficient destruction of hard targets by penetration munitions is the penetration fuze, the core of which is the initiation control strategy in high overload conditions. By investigating the current state of research on intrusion fuze initiation strategies, the future trends of layer counting identification and cavity counting identification are envisaged. © 2023 SPIE.

关键词： Ammunition

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Design and experimental study of a novel piezoelectric accelerometer 4

Design and experimental study of a novel piezoelectric accel...

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4th International Conference on Sensors and Information technology, ICSI 2024

作者： Zou, Qipeng Sui, Li Zhang, Meiyun Zhang, Li Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing100081 China Northwest Industries Group Co. Ltd. Xi'an710043 China

ISBN: (数字)9781510678699

ISBN: (纸本)9781510678682

The collision or penetration overload signal measured by the general accelerometer may encounter problems such as signal overlap and multi-layer signal adhesion. This paper designs a novel piezoelectric accelerometer with the characteristics of mechanical filtering and switching. The structure and working principle of this accelerometer are described in the paper, and its output characteristics are obtained through experiments. The experimental results show that the output signal of the new piezoelectric accelerometer has the characteristics of less high-frequency interference signal and no signal adhesion, which are conducive to the information extraction of collision and penetration multi-layer target by the flying carrier. © 2024 SPIE.

关键词： Accelerometers

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Improving on HEED protocol of wireless sensor networks with sleep scheduling algorithm

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Journal of Information and Computational science 2015年第13期12卷 5163-5173页

作者： Duan, Yabo Song, Chengtian Xu, Lixin Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing China

Wireless Sensor Networks together hundreds or thousands of sensors allow users to monitor a remote areas. Improving energy efficiency while ensuring a certain coverage ratio in Wireless Sensor Networks (WSNs) is an extremely challenging issue. In some long-term monitoring applications of WSNs, where full coverage is not required, nodes can go to sleep mode to reduce energy consumption and increase network lifetime. In this paper, we propose three sleep scheduling algorithms based on HEED (Hybrid Energy-Efficient Distributed clustering) algorithm: Fixed Node Degree (FND) algorithm, dynamic Node Degree (DND) algorithm and dynamic Node Degree combined with Remaining Energy (DNDRE) algorithm. Our primary goal is to maximize the network lifetime while guaranteeing coverage ratio of the entire WSNs. Furthermore, we propose a simple and practical coverage ratio calculation method. We find the DNDRE performs the best in three sleep scheduling algorithms. ©, 2015, Journal of Information and Computational science. All right reserved.

关键词： Scheduling algorithms

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A Multi-Layer Frequency Selective Surface with Broad Bandpass and High Selectivity

A Multi-Layer Frequency Selective Surface with Broad Bandpas...

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2024 IEEE International Conference on Computational Electromagnetics, ICCEM 2024

作者： Gao, Ruicheng Wen, Shuai Mao, Yongyan Bi, Lige School of Electronic Engineering Xidian University Xian China Science and Technology On Electromechanical Dynamic Control Laboratory China Electronic Engineering Research Institute Xian China

ISBN: (纸本)9798350383317

A novel broadband bandpass Frequency Selective Surface (FSS) is designed with the intention of surpassing the performance of previous designs. Through the utilization of cascading multilayers of capacitive patches and inductive grids, this design achieves our goal of wide bandwidth as well as high selectivity, while maintaining an acceptable thickness. The stimulated results exhibit a broad passband width, ranging from 12.5 GHz to 18.2 GHz, as well as steep out-of-band attenuation with a transitional zone of less than 1 GHz. © 2024 IEEE.

关键词： Frequency selective surfaces

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Design and simulation of high frame frequency CMOS camera image acquisition system

Design and simulation of high frame frequency CMOS camera im...

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International Conference on Automatic control and Artificial Intelligence, ACAI 2012

作者： Wei, Wang Nan, Chen Liming, Sun Ying, Guo Science and Technology on Electromechanical Dynamic Control Laboratory Xi'An Institute of Electromechanical Information Technology Xi'an710065 China School of Optoelectronic Engineering Xi'An Technological University Xi'an 710032 China

ISBN: (纸本)9781849195379

For the requirement of high frame in supervision and control for instruments in compartment and record of missiles lunching outside the compartment of a fighter, a high frame CMOS image acquisition system based on the FPGA is designed. High speed CMOS image sensor LUPA-300 is used in this system. Xilinx's FPGA is used as timing and readout of the image sensor and image transmission controlling. FIFO generated by FPGA using Verilog HDL (Hardware Description Language) achieves high-speed image data buffering. Camera Link interface is used to communicate with the image acquisition card of the host computer. The Experiments of the system show the frame can reach 249.6 fps in a format of 640*480 with the clock of 80 MHz.

关键词： Field programmable gate arrays (FPGA)

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LIGHTWEIGHT MARS SURFACE DETECTION ALGORITHM BASED ON IMPROVED YOLOV7 10

LIGHTWEIGHT MARS SURFACE DETECTION ALGORITHM BASED ON IMPROV...

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10th International Symposium on Test Automation and Instrumentation, ISTAI 2024

作者： Liu, Jingwei Dai, Juan Tian, Kaiyuan Sun, Kedong Beijing Key Laboratory of High Dynamic Navigation Technology Beijing Information Science & Technology University Beijing China Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing China School of Automation Beijing Information Science & Technology University Beijing China

ISBN: (纸本)9781837242672

Mars surface detection is a challenging task that takes into account environmental factors such as terrain complexity, ground flatness, rock distribution, geological features, and storms. In this paper, we address the complexity of rock distribution on the surface of Mars and the resource-constrained difficulties of intelligences in performing the task, and propose the Yolov7-MFGC model on top of Yolov7, which solves the problems of existing rock detection models in terms of large computational load and number of parameters, as well as resource constraints in a specific environment. In this paper, we use a homemade Mars surface rock dataset for training and testing, and the test results show that Yolov7-MFGC improves the accuracy by 1.7%, reduces the amount of parameters by 49%, shrinks the model volume by 49.6%, and reduces the GFLOPS by 70% compared with Yolov7. Therefore, it can be concluded that Yolov7-MFGC is able to better perform the Mars surface rock detection task. © The Institution of Engineering & technology 2024.

关键词： Martian surface analysis

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Optimization design and implementation of a novel dual-channel triangular planar capacitive sensor 9

Optimization design and implementation of a novel dual-chann...

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9th International Conference on Electromechanical control technology and Transportation, ICECTT 2024

作者： Cheng, Biyao Wang, Xiaozhuo Zhang, Yaru Yang, Bo Wang, Yiming Li, Yuwei Xi’an Institute of Electromechanical Information Technology Xi’an710065 China Science and Technology on Electromechanical Dynamic Control Laboratory Xi’an710065 China Henan Institute of Metrology Zhengzhou450000 China

ISBN: (纸本)9781510682399

In this paper, a new type of dual-channel triangular planar capacitive sensor is proposed, which can overcome the problems of small dynamic detection range and low sensitivity in nondestructive testing (NDT) applications. By establishing a three-dimensional simulation model of the sensor, the influence of structural parameters such as excitation electrode, shielding electrode, protective electrode, and thickness of substrate on its various performance indicators was systematically analyzed using ANSOFT finite element analysis (FEA) software. By studying the corresponding relationships between different performance indicators and structural parameters, a mathematical relationship between penetration depth and electrode structural parameters was established, and the general design principles and methods for dual-channel triangular planar capacitive sensors were determined. Finally, through experimental verification, it was proven that the theoretical analysis results were consistent with the experimental results, providing a theoretical basis for the optimization design and application of the dual-channel triangular planar capacitance sensor. © 2024 SPIE.

关键词： Partial pressure sensors

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Sensitivity analysis and probability modelling of the structural response of a single-layer reticulated dome subjected to an external blast loading

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Defence technology（防务技术） 2023年第5期23卷 152-163页

作者： Shao-bo Qi Guang-yan Huang Xu-dong Zhi Feng Fan State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081PR China Key Lab of Structure Dynamic Behaviour and Control of the Ministry of Education Harbin Institute of TechnologyHarbin150090China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of Ministry of Industry and Information Technology Harbin Institute of TechnologyHarbin150090China Beijing Institute of Technology Chongqing Innovation Center Chongqing401120China

The structural response of a single-layer reticulated dome to external explosions is shaped by many variables,and the associated uncertainties imply non-deterministic *** deterministic methods for predicting the consequences of specific explosions do not account for these ***,the impact of the uncertainties associated with these input variables on the structures’response needs to be studied and *** this study,a parametric uncertainty analysis was conducted ***,local and global sensitivity analyses were carried out to identify the drivers of the structural dynamic response.A probabilistic structural response model was established based on sensitive variables and a reasonable sample ***,some deterministic empirical methods for explosion-resistance design,including the plane blast load model of CONWEP,the curved blast load model under the 50%assurance level,and the 20%mass-increased method,were used for evaluating their *** results of the analyses revealed that the structural response of a single-layer reticulated dome to an external blast loading is lognormally ***,the MB0.5 method based on the curved reflector load model yielded results with a relatively stable assurance rate and reliability,but CONWEP did not;thus,the 1.2MB0.5 method can be used for making high-confidence simple *** addition,the results indicated that the structural response is very sensitive to the explosion *** on these results,it is suggested that for explosion proofing,setting up a defensive barrier is more effective than structural strengthening.

关键词： Dome structure Blast load uncertainty Sensitivity analysis Probabilistic investigation Reliability evaluation

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