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Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2014年 8918卷 245-255页

作者： Xu, He Xu, Yan Wang, Yantao Gao, X.Z. Alipour, Khalil College of Mechanical and Electrical Engineering Harbin Engineering University Harbin150001 China Department of Automation and Systems Technology Aalto University School of Electrical Engineering Aalto00076 Finland Department of Mechatronics Engineering University of Tehran Tehran Iran

The fast and accurate automatic extraction of pollutants on cameras of mobile robots plays a vital role in the follow-up camera’s automatic cleaning. Currently, most of the researches focus on the extraction algorithm for pollutants, and there are almost no relevant studies on the effects of camera’s movement forms on pollutant’s extraction algorithm. Consequently, this paper explores the impact on pollutant’s extraction algorithm when the camera is at the same speed, but in different movement forms, which provides some suggestions for the improvement of the pollutant’s automatic extraction algorithm. © Springer International Publishing Switzerland 2014.

关键词： Cameras

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An investigation and review into microwave thermography for NDT and SHM

An investigation and review into microwave thermography for ...

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Far East Forum on Nondestructive Evaluation/Testing: New Technology & Application (FENDT)

作者： Ruizhen Yang Hong Zhang Teng Li Yunze He Department of civil and architecture engineering Changsha University Changsha China School of Electronic and Information Engineering Fuqing Branch of Fujian Normal University Fuqing China School of Electrical Engineering Beijing Jiaotong University Beijing China College of Mechatronics engineering and automation National University of Defense Technology Changsha P. R. China

ISBN: (纸本)9781467369992

Infrared (IR) thermography is a fast-growing Nondestructive Testing (NDT) technique. Various sources can be used as the thermal stimulation, such as flash lamps, laser, ultrasound, and eddy current etc. Currently, various quantification methods for defect depth estimation are built based on the surface heating, heat conduction or thermal wave diffusion. Microwave heating is a new heating technique, which has a lot of advantages, such as strong penetrability, selective heating, volumetric heating, significant energy savings, uniform heating, and good thermal efficiency. In this work, the basic principle of microwave thermography (MWT) is introduced. The developments and case studies of microwave thermography are reviewed.

关键词： Electromagnetic heating Microwave imaging Microwave radiometry Microwave technology Microwave antennas

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An Investigation into Atmospheric Corrosion Detection under Paint with K-band Microwave NDT

An Investigation into Atmospheric Corrosion Detection under ...

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2015 IEEE Far East Forum on Nondestructive Evaluation/Testing:New Technology & Application(IEEE FENDT 2015)

作者： Hong ZHANG Lin Xu Luxiong XU Jusheng Wu Yunze HE School of Electronic and Information Engineering Fuqing Branch of Fujian Normal University The Institute of Innovation Information Industry Fuqing Branch of Fujian Normal University Institute of Applied Electronic Technology Fuqing Branch of Fujian Normal University College of Mechatronics engineering and automation National University of Defense Technology

Microwave based technique plays a vital role in non-destructive testing(NDT) field. A microwave based NDT method has been developed to detect and evaluate atmospheric corrosion under paint. The results are promising, the measurement sensitivity and resolution of microwave NDT can be significantly improved with known the lift-off(air layer) in the corrosion detection applications. The aim of this investigation was achieved by using electromagnetic computer simulation technology(CST 2012) describing the interaction of microwave signals radiated out of an open-ended rectangular waveguide with a layered medium. This CST program calculates the reflection coefficient(simulating corrosion measurements), and describes the field distribution in multiple layered media. Steel sample with 12 months exposure time has been measured. The experimental results were obtained by using a microwave NDT scanning system that was built according to the results of the theoretical investigation, and they confirmed the theoretical results.

关键词： Near-field microwave NDT open-ended rectangular waveguide lift-off corrosion detection

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The virtual assembly simulation and optimization design on single screw pump of offshore petroleum well cementing LADS device

The virtual assembly simulation and optimization design on s...

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作者： Wang, Zhan Xu College of Mechatronics Engineering and Automation Shanghai University 200072 China College of Mechanical and Electrical Qingdao University of Science and Technology Qingdao 266061 China

ISBN: (纸本)9783038351221

The single screw mathematical model is established based on dynamics analysis, and the numerical simulation and optimization design is analyzed. Through the virtual assembly simulation and digital assembly experiments on the single screw, to obtain the compatibility of the improved single screw structure. Thereby, the matching and assembly interference of model design is tested, to optimize the improved single screw compatibility between the stator and rotor, and the device is achieved a dynamic interactive digital assembly in virtual reality environments. © (2014) Trans Tech Publications, Switzerland.

关键词： Virtual reality

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A new laser point offsets eliminating method for airborne LiDAR by compensating laser pointing deviations

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Lasers in engineering 2015年第5-6期32卷 375-391页

作者： Tian, X. Xu, L. Xu, T. Jing, L. State Key Laboratory of Inertial Science and Technology School of Instrument Science and Opto-electronic Engineering Beihang University Beijing100191 China Key Laboratory of Precision Opto-mechatronics Technology of Ministry of Education School of Instrument Science and Opto-electronic Engineering Beihang University Beijing100191 China College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing210016 China

When the airborne light detection and ranging (LiDAR) instrument is in operation, the flight platform is expected to be in uniform linear motion, thus the obtained laser points distribute approximately uniformly on the ground. Unfortunately, due to existence of engine vibration and airflow disturbance, etc., the flight platform cannot be kept in ideal uniform linear motion in actual applications, which makes the platform attitude nonstationary and deviate from the planned route. As a result, the laser points deviated from the ideal positions, and distribute disorderly on the ground. In order to eliminate the influence of the attitude disturbances on the distribution of laser points, a new compensation method for laser pointing deviations was proposed. The scanning mirror was fixed on the centre of a two-axis compensation device that was ever constructed by the research group to which the authors belong. The normal direction of the scanning mirror can be changed to keep the reflected light along ideal direction and hence counteract the influence caused by attitude disturbances. The compensation method can be implemented in the following three steps: (i) Measure the attitude disturbances and the scanning angle using the inertial measurement unit (IMU) and the angle encoder in real time, respectively;(ii) calculate the required rotation angles of the inner and outer frames of the two-axis compensation device according to the attitude disturbances and the scanning angle;and (iii) rotate the inner and outer frames of the compensation device to the expected angle positions. To validate the new compensation method, numerical simulations and physical experiments were both carried out. The obtained results demonstrated that the laser point offsets have been greatly eliminated. © 2015 Old City Publishing, Inc.

关键词： Numerical methods

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Study of advanced process control technology and its application for ammonia-based flue gas desulfurization process 4

Study of advanced process control technology and its applica...

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4th International Workshop of Advanced Manufacturing and automation, IWAMA 2014

作者： He, Ren Chu He, Ren Chu Gu, Xiao Jing Gu, Xiao Jing College of Mechatronics Engineering and Automation Shanghai University Shanghai China Shanghai Key Laboratory of Intelligent Manufacturing and Robotics Shanghai China

ISBN: (纸本)9783038352532

As a new environmental-protection technology, large-scale ammonia-based Flue Gas Desulfurization (FGD) requires high control and process technology. The process of FGD almost includes all the operation units in chemical industry. In order to make the equipment adapt to some complex changes of original flue gas and operate on better work conditions like low energy consumption, optimum liquid/gas ratio, minimum water consumption, completely nitrites oxidization, the multivariable predictive control and soft sensor based on mechanism model are studied in this paper. And the results show that these problems of variables correlation, large delay and variables coupling of FGD are resolved. In addition, ammonia consumption is lower, by-products quality is improved, Besides, the process operation is more smooth and safe, so the equipment can run effectively and economically after carrying on advanced process control. © (2014) Trans Tech Publications, Switzerland.

关键词： Flue gases

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A method for amplitude and phase calibration in a spaceborne multibeam receiver

A method for amplitude and phase calibration in a spaceborne...

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第五届中国卫星导航学术年会

作者： Zhigang Huang Chunjie Qiao Yueke Wang College of Mechatronics Engineering and Automation of NUDT

ISBN: (纸本)9783642547362

This paper presents a method for amplitude and phase calibration in a spaceborne multibeam receiver, which is based on the satellite-ground link, to solve the inconsistent problem in amplitude and phase between different channels. In this method, the calibrating signal is firstly immitted by a ground control station, and then the discrepancy of amplitude and phase between different channels and the reference channel in the receiver are determined by signal processing. And self-calibration would finally be achieved by some inversion operations. Additionally, this paper adopted an advanced discrete fourier transform method to determine the parameters which is help to overcome the spectral leakage caused by the doppler frequency shift. Results denote that errors of amplitude and phase would heavily influence the beam pointing and beam shape for a spaceborne multibeam receiver which will lead to a distinct decline in performance. However, this problem is meliorated after our adapting the method in this paper to calibrate the amplitude and phase errors of the receiver.

关键词： multibeam receiver digital beam forming calibration of amplitude and phase parameter estimation

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Research on wearable human motion capture and virtual control 5

Research on wearable human motion capture and virtual contro...

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2014 5th International Conference on Information Technology for Manufacturing Systems, ITMS 2014

作者： Jiang, Fei Yu, Ying Jie Yan, Da Wei Department of precision mechanical engineering School of mechatronics and automation Shanghai University Shanghai China College of Fine Arts Shanghai University Shanghai China

ISBN: (纸本)9783038353263

This paper designed the posture initialization calibration method by the inertial sensor in human limb movement with any attitude toward. By initializing the target specific actions can be implemented to identify timing corresponding sensors and joint, and calculate the coordinate transformation relation of human skeletal coordinates corresponding to each inertial sensor's coordinate system and the 3D human skeleton model. Then through the coordinate conversion of inertial sensor attitude coordinates and depth first traversal calculation on human skeletal tree, real-time update of human motion body attitude data, driven simulation of human skeletal model by human motion, realize the real-time tracking of motion capture. © (2014) Trans Tech Publications, Switzerland.

关键词： Virtual reality

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Finite element analysis and optimization design on single screw pump of offshore petroleum well cementing LADS device

Finite element analysis and optimization design on single sc...

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作者： Wang, Zhan Xu College of Mechatronics Engineering and Automation Shanghai University 200072 China Collegeof Mechanical and Electrical Qingdao University of Science and Technology Qingdao 266061 China

ISBN: (纸本)9783038351214

关键词： Finite element method

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A surface acoustic wave sensor for the treatment of hydrocephalus

A surface acoustic wave sensor for the treatment of hydrocep...

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作者： Zhang, Bing Hu, Hong Li, Tianli Department of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen University Town Shenzhen518055 China College of Mechatronics and Control Engineering Shenzhen University Shenzhen518060 China

The hydrocephalus shunt system has a high risk of malfunction, which could lead to serious problems for patients. It is therefore important to monitor intracranial pressure (ICP). In this paper, a novel ICP sensor is presented to provide real-time pressure measurement for hydrocephalus patients. Surface acoustic wave technology is adopted in the design of the sensor so that it can interrogate wirelessly;and no battery is needed for providing energy, hence it could have a longer life span. The finite element method (FEM) simulation is performed to investigate the input frequency of the sensor;a prototype is fabricated, and the corresponding measurement system based on the NI PXI platform is established to analyze the performance of the sensor. The sensor has a measurement range of 0-14 kPa with sensitivity of 2.95°/kPa. The experimental results strongly suggest that the proposed sensor has the potential in monitoring ICP. © 2014 World Scientific Publishing Company.

关键词： Finite element method

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