- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Chengdu, China (2019.5.21-2019.5.24)] 2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Coordinated Control Strategy of Electric Vehicles and Energy Storage System for Smoothing Power Fluctuations of Photovoltaics
摘要： The increasing penetration of distributed photovoltaic (PV) generation causes significant power fluctuations in the distribution network. To maintain power quality and reliability, some measures must be taken to manage these fluctuations. Energy storage system (ESS) which have the advantages of high power density and fast charging and discharging switching speed are widely proposed to smooth the PV fluctuations. However, the operation cost of ESS is expensive. Dispatching charging and discharging power of EV is an economical way to solve the problem, but the dispatchable capacity of EV is not always sufficient. Therefore, we propose a real-time control strategy that the PV power fluctuations can be smoothed by EVs and ESS, in which a convex optimization model is established to solve the problem. This strategy smooths the PV power under the uncertainties of the PV output using the flexibility of the EV. The smoothing performances can be ensured by ESS output when the dispatching capacity of EV is insufficient. The smoothing error is controllable with the convex optimization model. The proposed strategy is able to reduce the total installed capacity and avoid the overcharge and overdischarge of ESS. Case studies were carried out to demonstrate the validity and application advantages of the strategy.
关键词： power fluctuations,Distributed photovoltaics,real-time optimal dispatching,energy storage system,electric vehicles
更新于2025-09-16 10:30:52
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Water-assisted laser desorption/ionization mass spectrometry for minimally invasive in vivo and real-time surface analysis using SpiderMass
摘要： Rapid, sensitive, precise and accurate analysis of samples in their native in vivo environment is critical to better decipher physiological and physiopathological mechanisms. SpiderMass is an ambient mass spectrometry (MS) system designed for mobile in vivo and real-time surface analyses of biological tissues. The system uses a fibered laser, which is tuned to excite the most intense vibrational band of water, resulting in a process termed water-assisted laser desorption/ionization (WALDI). The water molecules act as an endogenous matrix in a matrix-assisted laser desorption ionization (MALDI)-like scenario, leading to the desorption/ionization of biomolecules (lipids, metabolites and proteins). The ejected material is transferred to the mass spectrometer through an atmospheric interface and a transfer line that is several meters long. Here, we formulate a three-stage procedure that includes (i) a laser system setup coupled to a Waters Q-TOF or Thermo Fisher Q Exactive mass analyzer, (ii) analysis of specimens and (iii) data processing. We also describe the optimal setup for the analysis of cell cultures, fresh-frozen tissue sections and in vivo experiments on skin. With proper optimization, the system can be used for a variety of different targets and applications. The entire procedure takes 1–2 d for complex samples.
关键词： mass spectrometry,SpiderMass,real-time surface analysis,Water-assisted laser desorption/ionization,in vivo analysis
更新于2025-09-16 10:30:52
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[IEEE 2019 Global LIFI Congress (GLC) - Paris, France (2019.6.12-2019.6.13)] 2019 Global LIFI Congress (GLC) - A 5Gb/s $2\times 2$ MIMO Real-time Visible Light Communication System based on silicon substrate LEDs
摘要： In this paper, we propose and experimentally demonstrate a high-speed 2×2 MIMO real-time VLC system (64QAM-DMT) based 64QAM-Discrete Multi-Tone modulation. The system was achieved by utilizing field programmable gate arrays (FPGAs) and silicon substrate LEDs. The effect of attenuation of the attenuator in transmitter and receiver, the aperture diameter of the received signal, code rate and different modulation order have been investigated in our experiment. The experimental results show that our real-time VLC system can transmit over 2m distance for an overall 5Gb/s successfully.
关键词： Discrete Multi-Tone (DMT),Multiple-Input-Multiple-Output (MIMO),real-time Visible Light Communication (real-time VLC)
更新于2025-09-12 10:27:22
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[IEEE 2019 14th IEEE Conference on Industrial Electronics and Applications (ICIEA) - Xi'an, China (2019.6.19-2019.6.21)] 2019 14th IEEE Conference on Industrial Electronics and Applications (ICIEA) - Real-Time 3D Profiling with RGB-D Mapping in Pipelines Using Stereo Camera Vision and Structured IR Laser Ring
摘要： This paper is focused on delivering a solution that can scan and reconstruct the 3D profile of a pipeline in real-time using a crawler robot. A structured infrared (IR) laser ring projector and a stereo camera system are used to generate the 3D profile of the pipe as the robot moves inside the pipe. The proposed stereo system does not require field calibrations and it is not affected by the lateral movement of the robot, hence capable of producing an accurate 3D map. The wavelength of the IR light source is chosen to be non overlapping with the visible spectrum of the color camera. Hence RGB color values of the depth can be obtained by projecting the 3D map into the color image frame. The proposed system is implemented in Robotic Operating System (ROS) producing real-time RGB-D maps with defects. The defect map exploit differences in ovality enabling real-time identification of structural defects such as surface corrosion in pipe infrastructure. The lab experiments showed the proposed laser profiling system can detect ovality changes of the pipe with millimeter level of accuracy and resolution.
关键词： stereo camera,3D profiling,structured IR laser,pipeline inspection,real-time mapping
更新于2025-09-12 10:27:22
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[IEEE 2019 IEEE Energy Conversion Congress and Exposition (ECCE) - Baltimore, MD, USA (2019.9.29-2019.10.3)] 2019 IEEE Energy Conversion Congress and Exposition (ECCE) - Design and Implementation of Switch-mode Solar Photovoltaic Emulator using Power-Hardware-in-the-loop Simulations for Grid Integration Studies
摘要： This paper presents a photovoltaic (PV) emulator based on Power Hardware in the Loop Simulation (PHILS). Use of PHILS for source emulation is getting popular in the modern day due to its advantage in recreating an actual like testing environment. However, selection of proper power interface is crucial to achieve a stable PHILS. This paper utilizes an advanced control algorithm to extend the bandwidth of a switched mode buck-based power amplifier (PA). This allows PA in the interface to minimize the latencies thereby helping in the stability of the PHILS. The PV model inside the real time simulator is used to generate the PV characteristics as required. This allows user to have better flexibility as compared to conventional standalone PV emulator in a test setup for grid integration studies. A 260 W buck converter prototype is designed and implemented to realize the power amplification stage. The PV array model is simulated in real time digital simulator (RTDS). A comparative experimental evaluation is conducted between the real time PV array simulation and PHIL based PV emulator to validate its performance.
关键词： real time simulation,Solar PV emulator,PV simulator,power hardware in the loop
更新于2025-09-12 10:27:22
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[IEEE IEEE INFOCOM 2019 - IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS) - Paris, France (2019.4.29-2019.5.2)] IEEE INFOCOM 2019 - IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS) - Real-Time Experimental Demonstration of Multi-band CAP Modulation in a VLC System with Off-the-Shelf LEDs
摘要： We demonstrate, for the ?rst time, m-CAP modulation using off-the-shelf LEDs in a VLC in real time experimental setup using ?eld programmable gate arrays based in universal software radio peripherals (USRPs). We demonstrate transmission speeds up to ～30 Mb/s can be achieved, which supports high de?nition television streaming.
关键词： real time,?eld programmable gate array,visible light communications,modulation,Digital signal processing
更新于2025-09-12 10:27:22
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[IEEE 2019 41st Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC) - Berlin, Germany (2019.7.23-2019.7.27)] 2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) - A prototype system of portable laser speckle imager based on embedded graphics processing unit platform
摘要： Laser speckle contrast imaging (LSCI) is a high-resolution full-field optical technique for measuring blood flow, which has been widely used in clinical and biomedical research. However, most of the current LSCI instruments are bulky, limiting their application settings. In this work, we proposed a prototype system of portable laser speckle imager. Different from the desktop laser speckle systems that utilize personal computer (PC), our system was designed with embedded GPU system (Jetson TX2, NVIDIA, USA) and a LCD touch screen (16.5 × 12.4 cm in size, 380 g in weight). In-vivo experiments showed that the portable GPU-based system had comparable performance with our laboratory LSCI system. Such a portable LSCI imager could be potentially used in a situation that requires for easy operation and installation, such as intraoperative monitoring or bedside diagnosis.
关键词： Laser speckle contrast imaging,portable,blood flow,embedded GPU,real-time monitoring
更新于2025-09-12 10:27:22
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Real-time spatial intersecting seam tracking based on laser vision stereo sensor
摘要： A real-time robotic weld tracking system based on laser vision sensor is designed for intersecting seam. Firstly, the traditional image processing method is used to determine the weld feature point in the first frame when there has no arc noise. Then, an extending and adopting Kalman Filter with Spatio-Temporal Context algorithm was proposed to extract the weld feature point when the laser stripe was blocked by heavy arc and splash noise during welding. Next, in order to control torch to weld automatically, the torch frame was established through novel three points principle and an expanding circle and arc length method. In addition, a segmentation weld method and an intermediate proportional interpolation method for step-size control of mobile torch were proposed to guarantee the accurate of weld. Finally, Experiments and analyses results show that the tracking system is good in real-time, accuracy, stability and flexible, which can meet the weld requirements.
关键词： Laser vision sensor,Kalman filter,Real-time tracking,Spatio-Temporal Context,Intersecting seam,Trajectory planning
更新于2025-09-12 10:27:22
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Laser processing quality monitoring by combining acoustic emission and machine learning: a high-speed X-ray imaging approach
摘要： In situ and real-time monitoring of laser processes are very challenging due to complex dynamics of the laser-matter interactions. Acoustic emission (AE) technique is often used as non-destructive monitoring of many kinds of processes. However, acoustic emission is not industrialized for laser processing for two reasons. First, the signals are too sensitive to the environmental noises. Second, a correlation of the acoustic emission signal with the real events is very difficult to realize despite being of utmost importance. To overcome these difficulties, we combined fast hard X-ray imaging with acoustic sensors and state-of-the-art machine learning.
关键词： monitoring,machine learning,High speed X-ray,acoustic,in situ and real-time,Laser welding
更新于2025-09-12 10:27:22
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[IEEE 2019 International Conference on 3D Vision (3DV) - Québec City, QC, Canada (2019.9.16-2019.9.19)] 2019 International Conference on 3D Vision (3DV) - Real-Time Multi-Material Reflectance Reconstruction for Large-Scale Scenes Under Uncontrolled Illumination from RGB-D Image Sequences
摘要： Real-time re?ectance reconstruction under uncontrolled illumination conditions is well-known to be a challenging task due to the complex interplay of scene geometry, surface re?ectance and illumination. Nonetheless, recent works succeed in recovering both unknown re?ectance and illumination in an uncontrolled setting. However, they are either limited regarding the scene complexity (single objects / homogeneous materials) or are not suitable for real-time applications. Our proposed method enables the recovery of heterogeneous surface re?ectance (multiple objects and spatially varying materials) in complex scenes at real-time frame rates. We achieve this goal in the following way: First, we perform a 3D scene reconstruction from an input RGB-D stream in real-time. We then use a deep learning based method to estimate Ward BRDF parameters from observations gathered from individual segmented scene objects. Subsequently we re?ne these re?ectance parameters to allow for spatial variations across the object surfaces. We evaluate our method on synthetic scenes and successfully apply it to real-world data.
关键词： deep learning,RGB-D image sequences,Ward BRDF parameters,uncontrolled illumination,Real-time re?ectance reconstruction
更新于2025-09-12 10:27:22