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International Conference on Optical Communications and Networks (ICOCN)

作者： Yahui Wang Le Zhao Mingjiang Zhang Jianzhong Zhang Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan China

We propose and demonstrate a wide-range dynamic strain measurement system using single-slope assisted chaotic BOCDA. In SBS-based chaotic sensors, the linewidth of chaotic BGS is naturally broaden due to the multi-frequency pump wave. Thus, the linear section is provided a large dynamic range. This experiment is the first that a dynamic strain of 1200 με can be accurately identified using the single-slope assisted method, which is a significant improvement. The proposed method has a great demand potential in large-scale dynamic strain measurement.

关键词： Strain Strain measurement Frequency measurement Probes Scattering Optical fibers Chaotic communication

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A Novel High Energy Efficiency Electronic control Independent Variable Speed Closed Circuit Steering system for Wheel Loader

A Novel High Energy Efficiency Electronic Control Independen...

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International Conference on Fluid Power and Mechatronics (FPM)

作者： Wang Xiangyu Quan Long Yang Jing Feng Jiangjiang Zhang Xiaogang Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan China

ISBN: (数字)9781728103112

ISBN: (纸本)9781728103129

In order to reduce energy loss of steering system, a high energy efficiency electronic control independent variable speed closed circuit steering principle is proposed. All the hydraulic valves of the original steering system are removed, the required flow of the hydraulic steering cylinder is supplied by the fixed displacement pump, independently and directly. The servo motor speed is set proportional to the steering speed of an independent electric controlled steering wheel. Thus the output flow and the output volume of the pump match with steering speed and the steering angular of the wheel loader, respectively. To verify the feasibility and stability of the steering system during the automatic steering process, firstly, a co-simulation model of proposed steering system is built in the SimulationX software. Then, in order to validate the dynamic characteristics of the steering system, the test prototype of it is established. Finally, energy consumption of new steering systems is analyzed. Based on the results, by using the energy-saving closed circle pump controlled flow matching steering system the throttling loss, the relief loss and the median unloading loss of the steering process are eliminated, the energy consumption is reduced by 61%. A wheel loader can save about 83. 6 L of fuel. If this energy-saving steering system is adopted to all wheel loaders in china, the carbon emissions of 3.3 * 10 4 T will be reduced per year.

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Broadband Electromagnetic Wave Tunneling with Transmuted Material Singularity

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Physical Review Letters 2020年第20期125卷 207401-207401页

作者： Yichao Liu Fei Sun Yibiao Yang Zhihui Chen Jianzhong Zhang Sailing He Yungui Ma Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan 030024 China State Key Lab of Modern Optical Instrumentation Centre for Optical and Electromagnetic Research College of Optical Science and Engineering International Research Center for Advanced Photonics Zhejiang University Hangzhou 310058 China Department of Electromagnetic Engineering School of Electrical Engineering Royal Institute of Technology (KTH) S-100 44 Stockholm Sweden

Subwavelength channels filled with near-zero-index (NZI) media can realize extraordinary optical functionalities, for example, tunneling electromagnetic wave without reflections, but usually confined in a narrow wavelength band due to the material singularity (refractive index n≈0), which seriously limits the practical potentials. In this Letter, we show this limit can be fundamentally overcome by an alternative, named near-zero-index-featured (NZIF) structure, with the singularity transmuted via a controlled optical conformal mapping, enabling the device implementation with nonmagnetic normal dielectrics (i.e., relative permittivity >1). Their equivalence is strictly examined through a subwavelength tunneling waveguide. Classic wave tunneling features in a broad frequency range are revealed in various confined geometries. These properties are robust against the disturbance of several kinds of structural defects benefited from the infinite effective local wavelength. The broadband and lossless NZIF medium proposed here provides a promising way to pursue the fascinating light controlling functionalities as initially enabled by singular NZI materials.

关键词： Transformation optics Waveguides

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Chaos generation by a hybrid integrated chaotic semiconductor laser

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Chinese Physics B 2018年第5期27卷 122-130页

作者： Ming-Jiang Zhang Ya-Nan Niu Tong Zhao Jian-Zhong Zhang Yi Liu Yu-Hang Xu Jie Meng Yun-Cai Wang An-Bang Wang Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceTaiyuan University of TechnologyTaiyuan 030024China Institute of Optoelectronic Engineering College of Physics&OptoelectronicsTaiyuan University of TechnologyTaiyuan 030024China

We design a hybrid integrated chaotic semiconductor laser with short-cavity optical *** can be assembled in a commercial butterfly shell with just three *** of them is coated by a transflective film to provide the optical feedback for chaos generation while insuring regular laser *** prove the feasibility of the chaos generation in this compact structure and provide critical external parameters for the fabrication by theoretical *** than the usual changeless internal parameters used in previous simulation research,we extract the real parameters of the chip by ***,the maps of the largest Lyapunov exponent with varying bias current and feedback intensity Kap demonstrate the dynamic characteristics under different external-cavity *** laser chip has its own optimal external cavity length(L)and feedback intensity(Kap)to generate chaos because of the different internal *** have acquired two ranges of optimal parameters(L=4 mm,0.12〈Kap〈0.2 and L=5 mm,0.07〈Kap〈0.12)for two different chips.

关键词： chaotic dynamic characteristics integrated chaotic semiconductor laser short-cavity optical feedback extraction of internal parameters

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GPR detection of underground void based on low-rank and sparse representation 17

GPR detection of underground void based on low-rank and spar...

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17th International Conference on Ground Penetrating Radar, GPR 2018

作者： Liu, Li Han, Yinping Li, Jingxia Xu, Hang Wang, Bingjie Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan China

ISBN: (纸本)9781538657775

Underground void detection is important due to its effects on subsidence higher risk. Ground penetrating radar (GPR) is a nondestructive geophysical electromagnetic method and has been widely used in underground void detection or cavities locator. However, because of heavy clutter conditions, the void response is usually obscured. In this paper, an imaging-followed-removal algorithm based on low-rank and sparse representation is presented to suppress the clutter and obtain the void geometrical properties. The proposed algorithm firstly focus the sparsity of the raw data using Frequency-Wavenumber migration imaging method, and then removal the clutter by the robust principle component analysis (RPCA) method. Simulation results of air-filled void, air-water-filled void, and void with pipeline in its side show that our proposed algorithm can remove the dutter efficiently and then the void information can be easily obtained, which is beneficial to further identification. © 2018 IEEE.

关键词： Ground penetrating radar systems

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Temperature Sensing Characteristics of Surface Acoustic Wave Brillouin Scattering in Optical Microfibers

Temperature Sensing Characteristics of Surface Acoustic Wave...

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Progress in Electromagnetic Research Symposium (PIERS)

作者： Yi Liu Yuanqi Gu Pengfei Chen Rongrong Guo Yao Yao Yajun You Wenjun He Xiu-Jian Chou Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province Taiyuan University of Technology 79 West Yingze Street Taiyuan China Institute of Optoelectronic Engineering College of Physics and Optoelectronics Taiyuan University of Technology 79 West Yingze Street Taiyuan China Strong Digital Technology Co. Ltd. (Thinvent) Nanchang China Key Laboratory of Instrumentation Science and Dynamic Measurement Ministry of Education North University of China 3 Xueyuan Street Taiyuan China College of Mechatronics Engineering North University of China Taiyuan China Science and Technology on Electronic Test and Measurement Laboratory School of Instrument and Electronics North University of China Taiyuan China

ISBN: (纸本)9781665409889

Abstract-Temperature sensing characteristics of surface acoustic wave Brillouin scattering in 1-1.3 $\mu\mathrm{m}$ diameter optical microfibers are simulated by using the elastodynamic equation including the electrostrictive stress. A multi-peak Brillouin gain spectrum with rather high scattering efficiency is observed. The highest temperature sensitivity of the surface acoustic mode is 0.568 MHz/°C. Meanwhile, the temperature sensitivity of the surface acoustic mode is less affected by fiber diameter changes, ranging from 0.05 to 0.25 MHz/°C/$\mu\mathrm{m}$. It can be found that using SAW BS for temperature sensing would put less stress on manufacturing constraints for optical microfibers. Moreover, the results provide guidance for the further improving the performance of temperature sensing in the microelectronics field.

关键词： Temperature sensors Optical fibers Optical fiber sensors Temperature distribution Sensitivity Surface acoustic waves Microelectronics

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Life-detection radar based on wideband chaotic signal

Life-detection radar based on wideband chaotic signal

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IET International Radar Conference 2018, IRC 2018

作者： Xu, Hang Li, Ying Li, Liqiang Zhang, Jianguo Han, Hong Liu, Li Wang, Bingjie Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province Taiyuan University of Technology No. 79 Yingze West Main Street Taiyuan China College of Physics and Optoelectronics Taiyuan University of Technology No. 79 Yingze West Main Street Taiyuan China

We propose a novel life-detection radar using a wideband Boolean-chaos signal as a probe signal. The range between the radar and the human target can be obtained by correlating the echo signal from the target with its delayed duplicate. This range is modulated periodically by human chest's displacements along the recording time axis and the modulation frequency is the same as the respiratory frequency. Therefore, the authors propose a life-detection algorithm based on correlation method to detect the human target's respiratory frequency and range. Experimental results demonstrate that the authors' radar can simultaneously detect the respiratory frequency and range of the human target behind a 20-cm-thick wall. In addition, the high range resolution and excellent anti-jamming property of the chaotic radar have been demonstrated by their previous studies, which make it perform superbly in complex electromagnetic environments. © 2019 Institution of Engineering and Technology. All rights reserved.

关键词： Tracking radar

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Human-like Walking of a Biped Robot Actuated by Pneumatic Artificial Muscles and Springs*

Human-like Walking of a Biped Robot Actuated by Pneumatic Ar...

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IEEE International Conference on Automation Science and Engineering (CASE)

作者： Yixiang Liu Qing Bi Xizhe Zang Yibin Li School of Control Science and Engineering Shandong University Jinan China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China Engineering Research Center of Intelligent Unmanned System Ministry of Education Jinan China Shandong Institute of Advanced Technology Chinese Academy of Sciences Jinan China

ISBN: (数字)9781728169040

ISBN: (纸本)9781728169057

Human walking gait is much more natural looking and energy efficient compared with biped robots. This paper presents a bio-inspired approach to realizing more human-like biped robotic walking. For this purpose, a biped robot actuated coordinately by pneumatic artificial muscles and springs is developed, capable of exploiting passive compliance of the mechanical system in locomotion. And a control scheme for human-like walking is designed based on finite state machine. Experiments show that the biped robot can walk stably on the treadmill even with some small obstacles. The realized gait has the important features of human walking, including heel strike and toe off, stretched knees, and variation in the height of the body's center of mass, which demonstrates the effectiveness of the proposed approach.

关键词： Conferences Automation Computer aided software engineering

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Atom-assisted second-order sideband generation in an optomechanical system with atom-cavity-resonator coupling

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Physical Review A 2019年第6期99卷 063810-063810页

作者： Bin Chen Lei Shang Xiao-Fang Wang Jian-Bin Chen Hai-Bin Xue Xin Liu Jie Zhang Department of Physics College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan Shanxi 030024 China Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province Taiyuan Shanxi 030024 China State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi University Taiyuan 030006 China

Second-order sideband generation (SSG) is investigated in an optomechanical system with atom-cavity-resonator coupling. We focus mainly on the effect of the atomic ensemble trapped in the cavity on the SSG. The numerical results show that the second-order sideband is induced not only for the blue probe-pump detuning resonant case but also for the red one while coupling the atoms with the cavity. Moreover, it is found that the efficiency of the SSG can be significantly enhanced while increasing the atom-cavity coupling strength. More interestingly, the SSG is also sensitive to the atom-pump detuning. It is demonstrated that when optimizing this detuning and the atom-cavity coupling strength together, a robust second-order sideband can be induced and the efficiency of the SSG even surpasses the one of the first-order sideband generation. In addition, the efficiency of the SSG can also be tuned effectively by the decay rate of the atom.

关键词： Atoms, ions, & molecules in cavities Optomechanics Second order nonlinear optical processes Perturbative methods Rotating wave approximation

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Performance analysis of several wavelets in pipeline leak detection and location using Colpitts chaotic signal

Performance analysis of several wavelets in pipeline leak de...

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2018 International Conference on Electronics Technology, ICET 2018

作者： Zhang, Zhaoxia Cui, Gongzhe Xue, Xiaozhen Yang, Lingzhen Wang, Juanfen Xue, Pingping College of Physics and Optoelectronics Taiyuan University of Technology Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan Shanxi030024 China

ISBN: (纸本)9781538657522

In this paper, the performance of wavelet transform on the detection and location of pipeline leak are explored. The effects of three wavelets on different thresholds and different decomposition layers are studied. Firstly, the UWB(Ultra Wideband) chaotic signal generated by Colpittscircuit is used as the signal detection signal, and the leak point of the pipeline is detected and located by analyzing the cross-correlation coefficient between the detection signal and the echo signal after the pipeline reflection. Because there are some questions such as how to choose the optimal threshold function, wavelets and optimal number of decomposed layers, three wavelet thresholds (hard threshold, soft threshold and given threshold)which has different signal-To-noise ratio (5dB, 10dB, 30dB) are used in signal threshold denoising. The paper explores the denoising effects of three wavelets(sym4, db4, Haar) after three, four and five wavelet decomposition, and finally gets the optimal threshold method, wavelet function and decomposition layer. This is important to achieve high-precision detection and location of water pipeline leak. © 2018 IEEE.

关键词： Leak detection

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