2017 No. 05

Publish Date:2017-05-06
ISSN:0258-7998
CN:11-2305/TN
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Special Column-Robot and Industrial Automation

The congestion avoidance mechanism of firefly-inspired synchronicity algorithm

DOI:10.16157/j.issn.0258-7998.2017.05.001

Author:Hao Chuangbo,Song Ping

Author Affilications:School of Mechatronic Engineering,Beijing Institute of Technology,Beijing 100081,China

Abstract:The software-based method of firefly-inspired synchronicity algorithm may cause a terrible congestion when the network is close to getting synchronicity. Thus, a congestion avoidance mechanism is proposed for firefly-inspired synchronicity algorithm. This mechanism uses simplified phase model and disperses the transmission of synchronicity messages in the whole period stochastically, which can relieve the congestion effectively. At the end, this mechanism is evaluated by simulations and experiments, which shows that it can speed up the process, relieve the congestion effectively and get good performance in a network with high nodal density.
Key word:
wireless sensor network
synchronicity
bionic algorithm
firefly-inspired algorithm

Express monitoring system based on ZigBee

DOI:10.16157/j.issn.0258-7998.2017.05.002

Author:Liu Ding1,2,Li Xin′e1,2,Cui Chunsheng1,2,You Wenbin1,2,Wang Peng1,2

Author Affilications:1.National Key Laboratory for Electronic Measurement Technology,North University of China, Taiyuan 030051,China; 2.Instrument Science and Dynamic Test Laboratory,North University of China,Taiyuan 030051,China

Abstract:At present,it needs extensive human to sort the product and check the information and dispatch the express,to achieve the automation and intelligence of express industry,decrease labor costs,and improve the efficiency of express delivery industry. The paper designs an intelligent system on express supervision. It adopts Network Composing Technology of ZigBee,builds coordinator node and electric label point,and realizes efficient management and automatic sorting and quick look of express. Via reliable communication protocols,it makes delivering data stably,safely,reliably come true. It designs and processes automatic sort device,which combines automation and information technology. Large number of experiments show that the system achieves the anticipating targets that sorting the express automatically and quick look of express in dispatching.It increases the efficiency of express greatly.
Key word:
logistics
ZigBee
express
intelligent
automation

Development of 7th axis of spray robot based on off-line programming

DOI:10.16157/j.issn.0258-7998.2017.05.003

Author:Zheng You1,2,Fang Dandan2,Zeng Chunnian2

Author Affilications:1.School of electronic information engineering,Ningbo university of technology,Ningbo 315000,China; 2.School of Automation,Wuhan University of Technology,Wuhan 430070,China

Abstract:The trajectory generation of spray robot based on of off-line programming has become a trend of development of control method of spray robots. On the basis of our analysis and research about existing trajectory generation schemes of 6-axis robots, this essay proposes a scheme that increasing the 7th axis to a 6-axis robot in the design of spray trajectory. The scheme extends the reachable space of the robot by changing movement mode of 6-axis robot, which enables it to accomplish spray on complicated curved surface. Experiments show that the scheme presented in this essay performs better than traditional trajectory generation strategies of 6-axis robot for spray on complex curved surface.
Key word:
off-line programming
spray robot
7th axis

SCARA automatic assembly system based on vision guided

DOI:10.16157/j.issn.0258-7998.2017.05.004

Author:Dang Hongshe,Hou Jinliang,Qiang Hua,Zhang Chao

Author Affilications:School of Electrical and Information Engineering,Shaanxi University of Science and Technology,Xi′an 710021,China

Abstract:Grasping points for industrial robot of the existing production lines are fixed and the artifacts only can be placed with a fixed posture and in a fixed position. The complex industrial production requirements are hard to be satisfied with this assembly model and it is inefficient. The SCARA automatic assembly system based on vision guided is designed to improve the original system. The machine vision system is designed to realize the function of rapid identification, location and attitude determination of the artifacts. The assembly system is designed to achieve the function of precision grasping and placement of the artifacts. The image processing algorithm is actualized by the MFC program of Visual Studio and the coordinate and attitude data are sent to SCARA. The good stability and rapidity of this system are proved by the experiment results. The production requirements can be satisfied and the productivity is improved significantly by this system.
Key word:
machine vision
SCARA
assembly system
Socket communication

Design of indoor positioning system for mobile robot based on ultra-wideband

DOI:10.16157/j.issn.0258-7998.2017.05.005

Author:Lu Jingyu1,2,Yu Wentao1,2,Zhao Xin1,2,Sun Guangyi1,2

Author Affilications:1.College of Computer and Control Engineering,Nankai University,Tianjin 300350,China; 2.Tianjin Key Laboratory of Intelligent Robotics,Nankai University,Tianjin 300350,China

Abstract:In order to solve the problem of poor flexibility and low precision in the indoor localization of mobile robot, a high precision mobile robot indoor positioning system based on Ultra Wideband(UWB) is designed. The system consists of UWB module for wireless sensor networks, including of a UWB radio frequency module, with base station(Anchor) and the tag mounted on the top of the mobile robot(Tag). The system uses the technology of Asymmetric Double Sided Two-Way Range(ADS-TWR) to obtain the distance information between label and each base station, without needing the clock synchronization between base station and Tag. The distance information is transmitted from the base station to the PC through WiFi, and then located after being optimized by using the Kalman filter algorithm. The test results show that the system has the characteristics of simple layout, high precision and high real-time performance. The average positioning error of Static position is less than 13 cm and dynamic position error is less than 20 cm.
Key word:
UWB
indoor positioning
mobile robot
system design

Review and Comment

Survey on security threats of Internet of vehicles

DOI:10.16157/j.issn.0258-7998.2017.05.006

Author:Li Fujuan1,Wang Qun1,2,Qian Huanyan2

Author Affilications:1.Department of Computer Information and Cyber Security,Jiangsu Police Institute,Nanjing 210031,China; 2.School of Computer Science and Technology,Nanjing University of Science and Technology,Nanjing 210094,China

Abstract:With the rapid development of Internet of Vehicles(IoV) technology, its security threats have become more and more obvious and received much attention in academia,industry and government department. As one of the intelligent transportation, IoV is typical and advanced. Compared with the traditional Internet, because of its special application environment more, more complex networking and management more difficult, the more prominent security threats of IoV. From the perspective of data communication, this paper put forward the IoV security architecture, mainly analyzes the vehicle area network security threats, vehicular ad hoc networks security threats and vehicular mobile Internet security threats.
Key word:
Internet of Vehicles(IoV)
security threats
vehicle area network security threats
vehicular ad hoc networks security threats
vehicular mobile Internet security threats

Microelectronic Technology

Design of 0.13 μm CMOS current mode high precision reference source

DOI:10.16157/j.issn.0258-7998.2017.05.007

Author:Peng He,Wang Jun

Author Affilications:School of Information Engineering,Southwest University of Science and Technology,Mianyang 621000,China

Abstract:In order to improve the precision of the reference source, and reduce the power consumption, a low power consumption bandgap reference circuit with curvature compensation was designed. The circuit according to inherent exponential relationship of MOS sub-threshold region compensates higher-order temperature characteristics of PNP transistor emitter junction voltage. The circuit increased only two strands of current mirror making the circuit with low power consumption, and lower temperature coefficient compared with the traditional first order low voltage band gap reference circuit. Based on 130 nm COMS technology of SMIC, simulation show that the temperature is in the range of -20 ℃ to 80 ℃, and the temperature coefficient is 4.6 ppm/℃. The power supply rejection ratio is 60 dB, the output reference voltage is 610 mV. The overall circuit power consumption is 820 nW.
Key word:
band gap reference
sub-threshold
low power consumption
low voltage

An IDCT transform implementation on FPGA in HEVC

DOI:10.16157/j.issn.0258-7998.2017.05.008

Author:Huang Youwen,Dong Yang

Author Affilications:School of Information Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China

Abstract:To reduce the mutl-sized IDCT resource consume in the decoder of the new generation HEVC(High Efficient Video Coding),an IDCT processing circuit was proposed.In order to reduce the using of inner registers ,the embedded RAM units in FPGA were used to process the matrix transposition. A uniform circuit architecture of IDCT was derived from the decomposition of coefficient matrix.Pipeline technology was used to speed up the operation.Meanwhile,parallel data schedule will help to reduce the processing latency. Result showed that the throuput is 3.6 points per clock.It can handle 4k×2k@30 f/s video signal.
Key word:
HEVC
IDCT
FPGA
embedded RAM

A Nuttall window three spectral line interpolation FFT harmonic detection algorithm

DOI:10.16157/j.issn.0258-7998.2017.05.009

Author:Li Ping1,Li Yuan2,Kong Yinchang3

Author Affilications:1.School of Information Engineering,Huanghuai University,Zhumadian 463000,China; 2.State Grid Chongqing Electric Power Company Information and Communications Branch,Chongqing 400014,China; 3.School of Culture and Communication,Huanghuai University,Zhumadian 463000,China

Abstract:In order to obtain the accurate estimation of harmonics in power system, this paper presents the FFT method using Nuttall forms. In order to obtain the abrupt change of waveform, the wavelet transform is used to detect the transient state of the data. In order to judge the performance of this method, we select MATLAB to simulate the experiment. The results show that the amplitude and phase of the test results are more accurate, and the fitting level is only the result of fundamental wave detection.
Key word:
harmonic
Nuttall
FFT
wavelet transform
MATLAB
amplitude

Calibration of timing skew for TIADC with reference-injection single

DOI:10.16157/j.issn.0258-7998.2017.05.010

Author:Yin Yongsheng,Wu Jingsheng,Chen Hongmei,Li Kun

Author Affilications:School of Microelectronics,Hefei University of Technology,Hefei 230009,China

Abstract:A calibration algorithm with a reference-injection single was presented in this paper to calibrate the timing mismatch of Time-Interleaved Analog-to-Digital Converter(TIADC). This algorithm used a reference-injection single,which is sampled by the sub-channal′s CLKs of TIADC. We can acquire the timing skew by the operations of the output of the S/H and then feed it back to the multiphase clk. Achieve the compensation of time-skew with variable delay line. The presented calibration algorithm has lower hardware consumption with no restriction on the input single,and could be extended to arbitrary number of channels. Simulation result of 4 channal 12 bits TIADC with MATLAB shows that, with this calibration algorithm, the SFDR rose from 31.009 4 dB to 95.627 0 dB and the SNDR rose from 31.074 9 dB to 73.480 5 dB at the input frequency fin/fs=0.485,was proofed enough the effectiveness of this algorithm.
Key word:
reference-injection single
time interleaved ADC
timing-skew
variable delay line

Research on fault sensitivity zero-value analysis for concurrent error detection

DOI:10.16157/j.issn.0258-7998.2017.05.011

Author:Yan Yingjian,Wang Shoucheng,Xu Jijun,Wang Zhong

Author Affilications:College of Cipher Engineering,PLA Information Engineering University,Zhengzhou 450001,China

Abstract:Researching the basic principle of zero-value analysis and the essence of fault sensitivity analysis, the universal security evaluation model for concurrent error detection mechanism and a complete selection criteria of differentiation model is proposed to reduce the complexity of attack analysis. To verify the efficiency of the proposed fault sensitivity zero-value analysis method, the platform for fault sensitivity analysis is builted, and the proposed attack method is verified. Experimental results show that the proposed zero-value analysis method has the advantage of low computational complexity, high accuracy, and simple realization.
Key word:
fault sensitivity analysis
zero-value analysis
concurrent error detection
evaluation model
differentiation model

Implementation of low-cost FIR digital filters based on the new structures of extrapolation technique with residual compensation

DOI:10.16157/j.issn.0258-7998.2017.05.012

Author:Xu Hong1,Ye Feng2,Huang Chaogeng3

Author Affilications:1.College of Information Engineering,Zhejiang University of Technology,Hangzhou 310023,China; 2.Hangzhou Nationalchip Science & Technology Co.Ltd.,Hangzhou 310012,China; 3.School of Information,Zhejiang University of Finance & Economics,Hangzhou 310018,China

Abstract:The extrapolation technique with residual compensation utilizes the quasi-periodic nature of FIR filter impulse response to reduce the complexity of multiple constants multiplication, but the extra delay chains are inherent in the extrapolated impulse response structure. The three new extrapolated impulse response structures by changing the positions of extra delay chains in order to reduce the bit-width are proposed. Numerical examples are presented to demonstrate that one of the proposed new structures can efficiently save hardware resources on VLSI for some kinds of FIR filters, and applicable to low-cost design of digital systems.
Key word:
FIR digital filter
extrapolated impulse response
residual compensation
delay chains
ASIC

A task scheduling strategy for 3D engine based on load balance

DOI:10.16157/j.issn.0258-7998.2017.05.013

Author:Deng Yi,Tian Ze,Han Limin

Author Affilications:Xi′an Aeronautics Computing Technique Research Institute,AVIC,Xi′an 710065,China

Abstract:For the problem of how to logically schedule and efficiently allocation the shader resources of unified shader architecture inside of 3D engine, this paper proposes a task scheduling strategy and a hardware design scheme based on load balancing. Firstly, this paper analyses the characteristics of graphics rendering of unified architecture GPU. Secondly, based on the above analysis, two strategies are put forward. One is shader pre-allocating strategy which can avoid deadlock in graphing pipeline, another is resource scheduling and load balancing strategy based on queue statistics. Finally, the results of all simulation tests with complex rendering scene proves that the strategy proposed on this paper can reduce idle time and increase usage rate of shader resources as well as enhance processing efficient of 3D engine.
Key word:
schedule
load balance
unified architecture
Graphic Processing Unit(GPU)

Embedded Technology

Design and implementation of exception handling framework for embedded operating system

DOI:10.16157/j.issn.0258-7998.2017.05.014

Author:Wang Jigang1,Fang Fang2,Zhang Huaqiang1

Author Affilications:1.Technology Planning Department,ZTE Corporation,Nanjing 210012,China; 2.Information Center Department,The IT Electronics 11th Design & Research Institute Science and Technological Engineering Corporation,Chengdu 610021,China

Abstract:Though exception handling is crucial for enhancing the reliability of embedded systems, the traditional exception handling methods for hardware are difficult to adapt the development of embedded systems. In this paper, the exception handling requirements of embedded systems was analyzed, and a structural exception handling framework was proposed, in which some new features were introduced. Then taking the case of CGEL, the concrete realization and applying of this exception handling framework for embedded system was described. Comparison results with other exception handling methods show that the exception handling framework has perfect functions and rich interface, and the principle of escalation can help embedded systems to deal with various types of anomalies from multiple aspects.
Key word:
embedded system
exception handling
state machine
structural model

Research of product surface defects detection system based on image processing

DOI:10.16157/j.issn.0258-7998.2017.05.015

Author:Gao Zhengzhong,Zhao Chenhui,Xue Han,Shang Chunlei

Author Affilications:College of Electrical Engineering and Automation,Shandong University of Science and Technology,Qingdao 266590,China

Abstract:With the development of embedded technology, the advantage of product surface defects detection technology based on image processing is more and more prominent. The technology mainly includes acquisition, matching and recognition of product surface image. This system uses STM32F405 with single-precision floating operation as a core processor, CMOS color digital camera IC OV7610 as an image acquisition sensor, and uses the method of object-oriented with VC++ environment to design control program. They are mainly used for acquisition and processing of image. Experiments show that this system has high stability and meets the demands of real-time and controllable.
Key word:
product surface defects detection
image processing
STM32F405
CMOS image sensor

Design of communication between charger and BMS based on event trigger

DOI:10.16157/j.issn.0258-7998.2017.05.016

Author:Chen Ruyin,Lai Songlin

Author Affilications:College of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China

Abstract:For simplifying the communication between charger and Battery Management System(BMS), identifying and classifying the data that comes from the BMS correctly, a communication system between charger and BMS based on even trigger have been proposed in this report after studying and analyzing the national standard communication protocols(GB/T 27930-11). The system encapsulates logistic functions for communication flow that defined by the new national standard communication protocol based on the sequence of event trigger and applies the way of waiting fixed trigger data for receiving instead of the traditional interrupt mode. The research shows that this communication system can realize functions such as receiving, identifying, analyzing, classifying, transmitting and responding the BMS data. It optimizes the communication process and provides a convenient reference for the design of communication between charger and BMS.
Key word:
electric vehicle
charger
BMS
event trigger

Edge detection hardware acceleration based on Vivado HLS

DOI:10.16157/j.issn.0258-7998.2017.05.017

Author:Peng Xiwu,Zhang Tao

Author Affilications:Institute of Information Science and Engineering,Wuhan University of Science and Technology,Wuhan 430081,China

Abstract:For the issues of large delay and data storage limited by the bandwidth in the handling of high-definition images and video edge detection by computer,an optimized hardware acceleration design scheme using Vivado HLS transform edge detection software code into the RTL hardware circuit is proposed. Hardware acceleration is the computation of function module by the hardware circuit implementation,which is to solve the delay and data bandwidth constrained defect based on the hardware circuit with high working frequency and the custom data width. The results prove that the edge detection hardware acceleration method not only improved in both time delay and data bandwidth, but also shorten the development cycle of the edge detection.
Key word:
HLS
edge detection module
hardware acceleration
SoC

Design of an embedded trusted platform with self-recovery function

DOI:10.16157/j.issn.0258-7998.2017.05.018

Author:Sun Bo1,2,Wen Xuxia1,2,Gong Shuhong3,Liu Xinsheng4

Author Affilications:1.School of Instrument and Electronics,North University of China,Taiyuan 030051,China; 2.Shanxi Baixin Information Technology Co.,Ltd,Taiyuan 030006,China; 3.Shougang Changzhi Iron&Steel Co.,Ltd,Changzhi 046031,China; 4.Jiangsu Shuguang Photoelectrical Co.,Ltd,Yangzhou 225009,China

Abstract:This paper analyzes and discusses trusted chain technology and security boot process based on the TCG specifications, then constructs a trusted chain model suitable for embedded platform and a trusted boot implementation method with self-recovery function.Finally, some experiments are carried out on Beaglebone development board to verify its feasibility and make a conclusion.
Key word:
trusted platform
self-recovery
embedded system
trusted boot

Measurement Control Technology and Instruments

Design of miniaturized real-time CMOS image processing system based on FPGA

DOI:10.16157/j.issn.0258-7998.2017.05.019

Author:Zhang Longxiang,Wang Xiangjun,Cao Yu

Author Affilications:MOEMS Education Ministry Key Lab.,Tianjin University,Tianjin 300072,China

Abstract:Aiming at the problem of real-time and miniaturization of image processing system, a CMOS data acquisition and processing system are designed by Cyclone IV series FPGAs, which realizes image real-time acquisition, process and dual channel output. The miniature design of the system is achieved by structure optimization. The overall framework of the system, the structure of hardware, FPGA internal functions and the algorithm of image preprocessing are introduced. Finally, the functional experiment of the system is carried out, which can realize real-time image processing and enhance image in the case of dual channel real-time display. The result shows that this designed system is reasonable and feasible in applications.
Key word:
image processing system
CMOS
FPGA
real-time
miniaturization

Traceability system of potential transformer based on PCB RFID anti-metal label

DOI:10.16157/j.issn.0258-7998.2017.05.020

Author:Zhang Song1,Hong Tao1,Sheng Quangen2

Author Affilications:1.College of Quality & Safety Engineering,China Jiliang University,Hangzhou 310018,China; 2.Zhejiang Huacai Technology Limited,Hangzhou 310023,China

Abstract:A set of manufacturing traceability system based on PCB RFID anti-metal tag is designed for the discrete manufacturing industry of voltage transformer with voltage transformer. By analyzing product requirements and RFID advantages, this paper describes the various functional modules of the system and build the application architecture of the system. A good anti-metal RFID tag is designed for the product to achieve impedance conjugation matching and low return loss, and the use of three-sided metal enhances the antenna gain and radiation direction. This system enhances the comprehensive competitiveness of enterprises,lays the foundation for intelligent manufacturing and intelligent management.
Key word:
RFID
antenna design
anti-metal tag
voltage transformers
intelligent manufacture

Fault detection method for angular transducer of UAV redundancy actuator

DOI:10.16157/j.issn.0258-7998.2017.05.021

Author:Yang Jinpeng,Liang Dong,Yang Tao,Zhang Zhixin

Author Affilications:Control and Measurement Technology Department,China Academy of Aerospace Aerodynamics,Beijing 100074,China

Abstract:The basic idea of dual redundancy actuator is to ensure the reliability of actuator by switching between different redundancies. In this paper, a method based on the identification reference model is proposed for the fault detection technology of dual redundancy electric actuator of UAV. Firstly, the paper introduces the structure of the dual redundancy actuator, then the model of the actuator system is established through a combination of mechanism and theoretical analysis, and system identification method is used to determine the parameters of the model. Finally, the identified reference model is used to detect the fault of the dual redundancy angle sensor, and the effectiveness of the method is verified by the actual experiment.
Key word:
dual redundancy actuator
angular transducer
fault detection
reference model

Image compressed sensing coding and reconstruction system based on HPS and FPGA

DOI:10.16157/j.issn.0258-7998.2017.05.022

Author:Weng Tianyang1,Zhuang Yu1,Yu Wei2,Liu Yunfei1

Author Affilications:1.College of Information Science and Technology,Nanjing Forestry University,Nanjing 210037,China; 2.Engineering Training Center,Nantong University,Nantong 226019,China

Abstract:In view of the practical demand of the image coding and reconstruction system,this paper designed an image processing system based on HPS and FPGA at the DE1-SoC board which can realize the real-time collection, compression, transmission and reconstruction of the image. The IP core of D5M camera , SDRAM and VGA were designed in FPGA, and then the AXI and Avalon bus were used to connect the IP core in QSYS. Linux C programmed was used to achieve the image of CS coding and transmission in HPS. Finally, receiving data and reconstructing image by MATLAB in the PC,it can reduce the resource of FPAG and the complexity of design. The results show that the system can realize the capturing and compression transmission of any natural image, the image compression ratio is about 8%, PSNR is about 41 dB. It has flexible application and portability,and can meet the needs of practical engineering.
Key word:
HPS
compressed sensing
FPGA
image processing
Peak Signal to Noise Ratio

Design of equivalent sampling system for high-speed oscilloscope based on PLL

DOI:10.16157/j.issn.0258-7998.2017.05.023

Author:Zha Tianyi1,Chen Shengqi2,Ge Junyao3

Author Affilications:1.Jiangsu Province Changshu High School,Suzhou 215500,China; 2.Department of Electrical Engineering,Tsinghua University,Beijing 100084,China; 3.College of Telecommunications & Information Engineering,Nangjing University of Posts and Telecommunications, Nanjing 210023,China

Abstract:Using the fractional-N PLL chip ADF4351 as the sampling clock generator and FPGA for identical precision frequency measurement, an equivalent sampling system which has a maximum equivalent sampling rate of 160 GS/s is designed for high-speed oscilloscope under the beat frequency method sequential sampling principle. Combining the clock divider with the digital delay line to produce alternating sampling clock, and using four 8-bit ADC to finish time-interleaved sampling, this system′s highest real-time sampling rate reached 1 GS/s. Due to the low jitter clock source, the system keeps low noise over the designed bandwidth of DC to 500 MHz, whose signal to noise ratio is better than that of the equivalent sampling system based on DDS.
Key word:
fractional-N PLL
equivalent sampling
time-interleaving sampling
high-speed oscilloscope

Research on non-intrusive load monitoring method based on hidden Markov

DOI:10.16157/j.issn.0258-7998.2017.05.024

Author:Jiang Weihua,Ma Linchao,Zheng Xianfeng

Author Affilications:Department of Electrical Engineering,Henan Institute of Technology,Xingxiang 453000,China

Abstract:In order to achieve accurate, efficient and scalable state-of-the-art electronics decoding, a monitoring method based on hidden Markov model is proposed to embed the handover sparsity and sequence feasibility into the decoding process. Combining single-meter tree decomposition, a fast sequence decoding algorithm is proposed to reduce the time complexity of online decoding to polynomial. Experimental results show that fast sequence decoding makes it possible to monitor the status of a large number of electrical appliances efficiently and accurately.
Key word:
hidden Markov
load monitoring
non-intrusive

Design of seismic data acquisition interface board based on dual CPCI bus

DOI:10.16157/j.issn.0258-7998.2017.05.025

Author:Qiu Yongcheng,Xie Rongqing,Guo Yi

Author Affilications:Geophysical Department,China Oilfield Services Limited,Tianjin 300450,China

Abstract:In order to meet the requirement of large amount of seismic data acquisition, a seismic data acquisition interface board based on dual CPCI bus is designed. The board is designed to double CPCI bus structure, and uses high performance FPGA and DDR2 SDRAM for data processing and storage.It can realize the function of high-speed acquisition, preprocessing and CPCI bus transmission of seismic data. The design and implementation of dual CPCI bus structure, memory and high speed communication are introduced. The application results show that the board can meet the requirements of acquisition, processing and storing in the marine seismic exploration.
Key word:
seismic data acquisition
CPCI bus
LVDS

Communication and Network

Research on direct-to-earth communication performance during mars EDL process

DOI:10.16157/j.issn.0258-7998.2017.05.026

Author:Zhang Tiansheng1,Zhang Xiaolin1,Li Zan2

Author Affilications:1.School of Electronic and Information Engineering,Beihang University,Beijing 100191,China; 2.Beijing Institute of Tracking and Telecommunication Technology,Beijing 100094,China

Abstract:A specialized form of frequency-shift keying-MFSK used on the X-band direct-to-earth communication link during entry, descent, and landing(EDL) of Mars probe and its detection algorithm are analysed. For the problem of how to set the modulation indexes based on Doppler dynamics and the frequency interval between data tones, a lot of research work on how MFSK signal processing performance will be influenced by different modulation indexes, the frequency interval between data tones and the range of Doppler frequency rate during frequency acquisition and tracking has been done. The experiment results are showed as follows. First, the frequency interval between data tones has little influence on signal processing performance and is recommended to be set 80 Hz. Second, the modulation index should be set 45 deg when CNR is below 17 dB-Hz, otherwise, it should be set 48 deg. Third, the value of Doppler frequency rate during carrier frequency acquisition and tracking has large influence on signal processing performance. It may cause signal detection threshold rising by 3 dB when Doppler frequency rate is larger than 500 Hz/s.
Key word:
mars exploration
EDL
MFSK
carrier frequency acquisition and tracking
signal detection

An adaptation of the low SNR differential correlation acquisition method

DOI:10.16157/j.issn.0258-7998.2017.05.027

Author:Shang Sujuan1,2,Xu Yaohua1,Luo Jufeng2,Qiu Yunzhou2

Author Affilications:1.Key laboratory of Intelligent Computing & Signal Processing(Anhui University),Ministry of Education,Hefei 230026,China; 2.Shanghai Internet of Things CO.,Ltd,Shanghai 200050,China

Abstract:Acquisition is a key technology in DSSS system. The differential correlation is usually employed to eliminate the effect of frequency deviation. However, as the length of pseudo-code grows and the decrease of the SNR, the traditional differential acquisition algorithms will result in great loss of SNR. This paper presents an improved differential acquisition method, named as MUAC-DF. In the proposed method, the input signal is multiplied by the complex conjugate of the pseudo-code to eliminate its effect. After that, the product is applied to the M-orders Unbiased Auto-Correlation to compensate the SNR loss caused by the differential process. By means of mathematical model to analyze its acquisition performance. MUAC-DF acquisition algorithm is compared with the differential coherent and non-coherent acquisition algorithms through simulation. The simulation results indicate that this algorithm is approximately 4~5 dB superior to the traditional differential acquisition algorithms in improving acquisition sensitivity and more adaptive to work under low SNR.
Key word:
DSSS
long pseudo-code acquisition
low SNR
differential correlation acquisition

Small target detection in sea clutter based on characteristic spectrum of intrinsic mode functions

DOI:10.16157/j.issn.0258-7998.2017.05.028

Author:Chen Zezong1,2,Yang Gan1,Zhao Chen1,He Chao1

Author Affilications:1.School of Electronic Information,Wuhan University,Wuhan 430072,China; 2.Collaborative Innovation Center for Geospatial Technology,Wuhan University,Wuhan 430079,China

Abstract:Empirical mode decomposition algorithm has potential applications in sea clutter suppression and target detection, but how to realize automatic selection and discrimination of modal functions is the key problem of this algorithm. In this paper, by analyzing the harmonic model of modal functions, characteristic spectrums are extracted, and target is detected adaptively after selecting appropriate features. Firstly, the echoes of radar are preprocessed by complex EMD. Secondly, characteristic spectrum is extracted from each intrinsic mode function, and then distribution characteristics are obtained. Finally, target detection is realized adaptively based on the difference of distribution characteristics in all mode functions between target and sea clutter. Processing of the measured data from microwave Doppler radar shows that the detection results are consistent with the fact, and detection probability is higher than the traditional detection algorithms under a certain false alarm rate. It provides a new guidance for marine radars to detect small targets.
Key word:
microwave Doppler radar
target detection
empirical mode decomposition
characteristic spectrum
sea clutter

Research on cache mechanism based on in-network cache assist

DOI:10.16157/j.issn.0258-7998.2017.05.029

Author:Liu Sheng1,Wang Jiangtao2

Author Affilications:1.Information Center,Sichuan College of Traditional Chinese Medicine,Mianyang 621000,China; 2.School of Software Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China

Abstract:The significant increasing in traffic on mobile data networks results in unacceptable delays for end users and a significant increase in mobile carrier transmission costs. In order to solve this problem, an eNodeB caching mechanism based on intra-cache caching is proposed, its cache performance is improved to realize the efficient application of eNodeB in the cache. Optimizing local caching decisions of eNodeB through cached information within the network. Through the real traffic data collected from the actual network, the proposed cache strategy was experimentally verified. The results show that this mechanism can significantly reduce the network delay and bandwidth consumption.
Key word:
in-network cache
eNodeB
mobile network

A high-throughput routing algorithm for opportunistic networks based on cooperative relays

DOI:10.16157/j.issn.0258-7998.2017.05.030

Author:Ren Zhi,Wang Zhongyong,Zhang Yong

Author Affilications:Chongqing Key Lab of Mobile Communication Technology,Chongqing University of Posts and Telecommunications, Chongqing 400065,China

Abstract:To address the trading deadlock problem in exchanging data packets of Barter routing algorithm for opportunistic networks, a new routing algorithm based on cooperative relays, RACR, is proposed. RACR introduces cooperative relays strategy in the message exchange process, brings in multi-player trade to invoke unidirectional transmission of data packets, and optimizes the judgment of packet deleting, so that it can effectively solve the deadlock problem in message exchange process, which improves the network throughput and reduces the data packets end-to-end delay. Theoretical analysis and simulation results show that RACR can improve network throughput by 7.9%, and the decrease in the average end-to-end delay is more than 8.5%, as compared to Barter routing algorithm and Direct Transmission(DT) routing algorithm.
Key word:
opportunistic networks
Barter
game theory
cooperative relays
routing algorithms

Computer Technology and Its Applications

Local mean decomposition method to eliminate end effects of BP neural network method of closing the mirror

DOI:10.16157/j.issn.0258-7998.2017.05.031

Author:Wang Lina1,Yang Jian2,Meng Qingqiang3

Author Affilications:1.Mathematics and Information Technology,Jiangsu Second Normal University,Nanjing 210036,China; 2.Information Construction and Management Office,Jiangsu Second Normal University,Nanjing 210036,China; 3.Nanjing NARI Group ICT Branch,Nanjing 210003,China

Abstract:Local mean decomposition(LMD) signal processing method is elaborated and is very suitable for non-stationary signals, which can end effect severely restrict its further application. And promotion of local mirror extension is decomposed basic ways end effect processing,which needs to be mirrored surface in local extreme point. Actual signal is sometimes difficult to satisfy this condition,which may lead to serious distortion signal decomposition. To solve this problem, a conventional mirror extension and neural network is proposed to improve new LMD end effect eliminate the effect by a combination of data extrapolation method. The neural network model predictions fit the data points outside the end of original signal, thereby captures one or more endpoints than the extreme point. And then,mirroring technology forms a closed process, thereby inhibits the end effect. Simulation results show that the proposed method can effectively suppress LMD end effect.
Key word:
LMD
BP neural network
simulation signal
end effect

Research and implementation of synchronization method on PT secondary loop voltage drop

DOI:10.16157/j.issn.0258-7998.2017.05.032

Author:Chen Guoqiang1,Zhu Chongye2

Author Affilications:1.Hangzhou Vocational and Technology College,Hangzhou 310018,China; 2.Ningbo Sunrise Instruments Co.,Ltd.,Ningbo 315032,China

Abstract:This paper puts forward a current synchronization method of wireless measurement that can be used for the PT secondary loop voltage drop,and makes up for the inadequacy of tester based on GPS synchronization.It uses the passing zero signal of the loop current sampling signal as source signal of synchronization,and start measurement synchronization is achieved by shaking hands between master-slave machines.The synchronizations of multipoint sampling in whole cycle are achieved by testing step correction method. The test prototype performances can meet the requirements of relevant national standards,and the new test equipment will be used widely in the industry.
Key word:
synchronous method
wireless measurement
secondary loop voltage drop
potential transformer

Research and simulation of four rotor aircraft control system based on cascade PID

DOI:10.16157/j.issn.0258-7998.2017.05.033

Author:Xue Jiale,Cheng hang

Author Affilications:College of Mechanical Engineering,Taiyuan University of Technology,Taiyuan 030024,China

Abstract:Quadrotor aircraft that has four input and six output, is unstable, nonlinear, strong coupling, modeling uncertainties and other characteristics, which is a under actuated system. In view of such systems, scholars have done a lot of research in the design of aircraft control method and controller, such as LQR, sliding mode control, backstepping control and so on. In terms of attitude control that these control algorithms has better effect, but accurate mathematical model need to be established, real time data processing on the processor performance requirement is particularly high, there are a certain difficulties to achieve. Aiming at these problems, this paper takes small quadrotor as the research object, quadrotor dynamics model is established according to the Newton Euler equation. An easy to implement cascade PID controller is designed to control the position and attitude of the aircraft, using Matlab/Simulink to design the controller simulation. The results show that the cascade PID controller can control the attitude and position of the quadrotor quickly, stably and accurately, and has good robustness.
Key word:
small quadrotor aircraft
cascade PID controller
modeling
simulation

Object tracking method based on Mean-Shift of edge adaption

DOI:10.16157/j.issn.0258-7998.2017.05.034

Author:Zhou Yang,Hu Guiming,Huang Dongfang

Author Affilications:College of Electrical Engineering,Guangxi University,Nanning 530004,China

Abstract:A moving object tracking method that a self-adaption searching window based on edge feature is proposed in this paper, which aims at the limitation of the Mean Shift algorithm for the fixed searching kernel window. In video image sequence, when the object is far from or closer to the camera, size of the searching window can change small or big to result in too much background noise existing in the fixed kernel window of Mean Shift searching algorithm either, or does not contain complete object feature, so that the tracking effect becomes worse. This paper uses edge detection to calculate binary image of the field taking the object as the center and slightly larger size than the Mean Shift nuclear window radius as the radius. According to the center of mass of the binary image, this paper utilizes the gradually narrow circle to approach to goal in order to seeking for true Mean Shift kernel window radius, which reached the purpose of kernel functions radius adapting object. Experimental results show that the method of automatically adjusting the Mean Shift nuclear window radius according to the edge feature significantly reduced the effect with the change of the object shape, and accurately and effectively realized moving object tracking.
Key word:
Mean Shift
radius of searching
edge detection
self-adaption
object tracking

Power Supply Technology and Its Application

Research on a low-frequency current ripple PV micro-inverter

DOI:10.16157/j.issn.0258-7998.2017.05.035

Author:Fu Min,Ji Baojian,Huang Shengming

Author Affilications:College of Electrical Engineering and Control Science,Nanjing TECH University,Nanjing 211816,China

Abstract:A new low-frequency current ripple isolated flyback topology to stabilize the output current and voltage of PV modules with ultra-small capacitor is proposed in this paper. Therefore Maximum Power Point Tracking(MPPT) can be easily done and high conversion efficiency and high reliability can be achieved at the same time. Operation principle of the new topologies is analyzed in details. Based on this innovation idea, theory analysis, modelling, simulation and test will be carried out to demonstrate the advantages of this novel topology and its control method. The development of this key technology and the control method will provide technical supports and be very useful for a wide application of solar energy.
Key word:
PV micro-inverter
low-frequency current ripple
current control
flyback

Design and verification of enhanced quasi-Z source inverter

DOI:10.16157/j.issn.0258-7998.2017.05.036

Author:Li Zhengming,Zhou Jianwei,Zhang Guosong

Author Affilications:College of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,China

Abstract:Lower boost capability of traditional Z source inverter limits the Z-source inverter used in some occasions with low input voltage levels. In view of this situation, we propose enhanced quasi-Z-source inverter. Compared to the previous proposed topology, the new topologies have two advantages:voltage boost capacity of the inverter is enhanced to expand the scope of application,higher modulation factor can improve the output power quality. Enhanced topologies were theoretical analyzed in detail. In addition, simulation and experimental results validate the feasibility and superiority of proposed topologies.
Key word:
quasi-Z source inverter
boost capacity
shoot-through

A quasi Z source AC/AC converter with voltage stress of a small capacitor

DOI:10.16157/j.issn.0258-7998.2017.05.037

Author:Fang Xupeng,Ma Bolong,Zhao Ke,Zhao Yang,Yan Peng

Author Affilications:Shandong University of Science and Technology,Qingdao 266590,China

Abstract:In order to overcome the deficiencies of traditional AC-AC converter, this paper designed a quasi-Z -source AC/AC converter with voltage stress of a small capacitor,the topology structure and working principle of the circuit are analyzed, this topology is composed of two series quasi-Z-source networks and a single-phase LC filter. A pulse width modulation method(PWM) is chosen to vary the output voltage by controlling the duty cycle. Using MATLAB/Simulink to perform circuit simulation, and finally, the experimental circuit based on TMS320F2812 is built, both of the simulation results and experimental results verify the validity and reliability of the circuit.
Key word:
quasi-Z-source
AC-AC
PWM
capacitor voltage
buck-boost

Research on topology and control strategy of wireless charging system for electric vehicle

DOI:10.16157/j.issn.0258-7998.2017.05.038

Author:Liu Xintian,Qin Wenwen,Zheng Xinxin

Author Affilications:School of Science and Technology,Hefei University of Technology,Hefei 230009,China

Abstract:In this paper, a new control system is put forward in view of the disadvantages of the existing electric vehicle wireless charging control system. The double closed loop control of AC/DC and double close loop control of DC/DC structure, the removal of the traditional control system of wireless signal feedback module, and joined the power factor correction and soft-switch technology. The charging control system are simulated in the MATLAB/Simulink environment, AC/DC, magnetic coupling and DC/DC converter is built, the simulation experiments are performed to test the battery charging process, and the design of the charging system PCB and eventually to build the hardware platform to verify the feasibility and stability of the scheme.
Key word:
PFC
soft switch
electric vehicle
wireless charging

High Performance Computering

Information Flow and Energy Flow in Industrial Digital Transformation

Special Antenna and Radio Frequency Front End

Radar Target Tracking Technology

Key Technologies of 5G-A and 6G

Key Technologies of 5G and Its Evolution

Key Technologies of 5G and Its Evolution

Processing and Application of Marine Target Characteristic Data

Smart Power

Antenna Technology and Its Applications

5G-Advanced and 6G

Smart Agriculture

5G Vertical Industry Application

Microelectronics in Medical and Healthcare

Key Technologies for 6G

Application of Edge Computing in IIoT

Deep Learning and Image Recognization

6G Microwave Millimeter-wave Technology

Radar Processing Technology and Evaluation

Space-Ground Integrated Technology

Industrial Ethernet Network

5G Vertical Industry Application

FPGA and Artificial Intelligence

Innovation and Application of PKS System

5G Network Construction and Optimization

RF and Microwave

Edge Computing

Network and Business Requirements for 6G

5G and Intelligent Transportation

5G R16 Core Network Evolution Technology

Satellite Nevigation Technology

5G R16 Evolution Technology

5G Wireless Network Evolution Technology

5G Network Planning Technology

5G Indoor Coverage Technology

5G MEC and Its Applications

5G Co-construction and Sharing Technology

Expert Forum

5G and Emergency Communication

5G Slicing Technology and Its Applications

Industrial Internet

5G Terminal Key Realization Technology

5G and Artificial Intelligence

5G and Internet of Vehicles

Terahertz Technology and Its Application

Signal and Information Processing

Artificial Intelligence

5G Communication

Internet of Things and the Industrial Big Data

Electronic Techniques of UAV System

Power Electronic Technology

Medical Electronics

Aerospace Electronic Technology

Robot and Industrial Automation

ADAS Technique and Its Implementation

Heterogeneous Computing

2016 IEEE International Conference on Integrated Circuits and Microsystems

ARINC859 Bus Technology

FC Network Technology

Measurement and Control Technology of Bus Network

GJB288A Bus

Key Techniques of 5G and Algorthm Implement

IEEE-1394 Bus

Signal Conditioning Technology of Sensors

AFDX Network Technology

Discrete Signal Processing

Energy-Efficient Computing

Motor control

2012 Altera Electronic Design Article Contest