2009 Vol. 35, No. 4

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Discussion of Thought of Calculation and Risk Assessment of Single Danger Source of Coal Mine Accident
WANG Pei, LI Xin-chu
2009, 35(4): 1-5.
<Abstract>(20) <PDF>(3)
Abstract:
Based on analyzing and summarizing classification and characteristics of single danger source of coal mine accident,the paper gave steps of calculation and risk assessment of single danger source of coal mine accident.In calculation of single danger source of coal mine accident,it is needed to identify danger source according to single danger source data of single coal mine accident collected and decide characteristics of single danger source,so as to select proper calculation method and thought of danger source to do calculation and do assessment to calculation result.In risk assessment of single danger source of coal mine accident,it is needed to calculate probability and risk probability of single danger source of coal mine accident,do loss assessment to single danger source of coal mine accident,and on the basis do risk assessment to single danger source of coal mine accident and divide danger levels of single danger source according to assessment result,so as to make corresponding measures to reduce probability of accidents caused by single danger source.
Visual Interpretation Technology of Multi-target Remote Monitoring for Mineral Development in Gather Phosphorus Area of Western of Hubei Province
PENG Ying~, ZHANG Zhi~, PENG Dan~, WANG Jie~, Yang Qing-hua~
2009, 35(4): 6-9.
<Abstract>(23) <PDF>(4)
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The paper took western of Hubei province as research area and made use of multi-source remote sensing image to monitor development and utilization status of mineral resources in weatern of Hubei province,execution status of plan and status of mineral environment and disruption to environment.Based on collecting satellite remote sensing data in research area widely and relative non-remote sensing data such as mining right data and so on,multi-target information is extracted through processing and enhancing image.It also discussed corresponding methods of visual interpretation in multi-target remote monitoring for mineral resources development.
Predicting Model of Gas Content Based on Improved BP Neural Network
ZHAO Yan-ming
2009, 35(4): 10-13.
<Abstract>(23) <PDF>(2)
Abstract:
Gas content in coal seam is one of important performance indexes of safety production in coal mine,but routine predicting methods based on experience and traditional mathematical model are difficult to predict gas content in coal seam accurately.Aiming at the problem,on base of analyzing model of improved BP neural network based on Fletcher-Reeves conjugate gradient method,combining with kinds of influence factors of gas content in coal seam,the paper established a predicting model of gas content based on improved three-layer BP neural network and did concrete network training and predicting simulation.The results showed that the predicting model of gas content has quick convergence speed and high predicting precision,which can meet requirements of practical production.
Research of Risk Assessment System for Environment Information in Coal Mine Underground Based on MSF
XU Lei~, ZHENG Hua~, SONG Qiang~
2009, 35(4): 14-16.
<Abstract>(30) <PDF>(2)
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Combined with characteristics of environment information in coal mine underground,the paper introduced a risk assessment system of environment information in coal mine underground based on multi-sensor information fusion(MSF).The system establishes model of three-layer error back propagation neural network used in risk prediction of environment information in coal mine underground and adopts information fusion algorithm of neural network to analyze and treat sample data.The simulation results showed that the system can assess risk degree of environment information in coal mine underground more accurately and has better robustness and generalization ability.
Design of Control System of Emulsion Liquid Level Based on Fuzzy-PID Control
LIU Shi-xian, ZHU Hua, WANG Yong, ZHU Feng-pei
2009, 35(4): 17-19.
<Abstract>(10) <PDF>(3)
Abstract:
Aiming at the problems that change of emulsion liquid level of fully mechanized coal face had nonlinear and time-delay,its mathematical model was difficult to be established and so on,the paper introduced design of a control system of emulsion liquid level based on fuzzy-PID control.The system combines fuzzy control with traditional PID control.When difference of practical measurement liquid level and setting liquid level is bigger,the system adopts fuzzy control and when the difference is smaller,it adopts PID control.The control way is flexible and has good robust performance and strong anti-interference ability.The result of Matlab/Simulink simulation showed the system has fast response and high precision,which can meet control requirements of emulsion liquid level of fully mechanized coal face.
Simulink Simulation of Zero Sequence Power Line Selection Algorithm of Underground NUS
ZHUANG Wei~, GONG Mao-fa~, QIAN Feng~
2009, 35(4): 20-24.
<Abstract>(10) <PDF>(2)
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The paper used Simulink toolbox of Matlab to establish simulation model of single phase grounding fault of underground NUS.It expounded principles of zero sequence power line selection algorithm and zero sequence power line selection algorithm with compensation,introduced simulation structure of line selection model based on zero sequence power line selection algorithm,and adopted method of simulating operation mechanism of line selection device to simulate and analyze the both line selection algorithms.The simulation results showed that the zero sequence power line selection algorithm has high veracity of line selection,strong anti-interference ability and quick response speed to faults and suits to be line selection algorithm of single phase grounding fault of underground NUS.
Research of Direct Torque Control System for PMSM Based on Sliding Mode Control
WANG Wei, GUO Feng-yi, CHEN Peng
2009, 35(4): 24-28.
<Abstract>(33) <PDF>(2)
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Traditional direct torque control adopts circle-flux control with six-section and has large torque ripple and bad control performance.When influence of voltage drop of stator resistance is considered,its section chosen has disadvantage.Aiming at above problems,the paper proposed direct torque control strategy based on twelve voltage space vectors.It established direct torque control system of twelve voltage space vector of permanent magnet synchronous motor,made corresponding on-off principle and adopted sliding mode variable structure to design speed regulator,which replaced traditional PI regulator in order to enhance robustness performance of anti-interference and resisting parameter distortion of the system.The simulation results showed that stator flux and torque ripple of the system are small and dynamic and static response of the system are good.
Research of Improved SVPWM Method of 3H-bridges Cascaded Multilevel Inverter
MA Zhi-xun~(, 2), HE Feng-you~(
2009, 35(4): 28-31.
<Abstract>(28) <PDF>(2)
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Clamping multilevel inverter and 2H-bridges cascaded multilevel inverter have complex circuit structure and control,while 3H-bridges cascaded multilevel inverter can overcome the disadvantages.SVPWM control method of five-level inverter is already relized,but if it is used in inverters outputing more levels,then computational complexity would be very large and control would be difficult. While on the base of the control method,through adopting suitable phase-shift angle between space voltage vectors,it is easy to realize SVPWM control of 3H-bridges cascaded multilevel inverter.The paper took 3H-bridges nine-level inverter as an example and adopted Matlab simulation to verify feasibility and correctness of the control method.
Research of Control Method of Energy Feedback System Based on Space-vector
SONG Shu-zhong, WANG Hao-ran, ZHOU Qiu-ya
2009, 35(4): 32-35.
<Abstract>(13) <PDF>(3)
Abstract:
Aiming at the problem that general inverters couldn’t eliminate pumping voltage well produced when motors were decelerating and braking,the paper proposed a SVPWM control method of energy feedback system of inverter.The control method is used in active inverter circuit and adopts SVPWM control strategy based on fixed switching frequency,which can eliminate pumping voltage effectively and realize dynamic tracking of phase and feedback with unity power factor of current.Moreover,the method can make general inverters run in four quadrants with characteristics of high voltage utilization ratio and quick dynamic response.The simulation results verified correctness and validity of the control method.
Analysis of Several Bandwidth Estimate Algorithms of TCP and Its Compariso
JIANG Xiao-yan, LI Shi-yin, ZHANG Ming-sheng, YANG Lei, QIN Li-bo
2009, 35(4): 35-38.
<Abstract>(15) <PDF>(4)
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Analysis of Real-time Performance of EPA and Its Calculatio
JIANG Xiu-zhu~, FENG Dong-qin~, XU Zhao~
2009, 35(4): 39-43.
<Abstract>(82) <PDF>(3)
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On the base of analyzing transmission principle of periodic data in EPA network deeply,the paper discussed communication delay composition of periodic data in end-to-end transmission process of EPA network and end treatment process.And it took a typical EPA network composed of micronet segments as an example to do quantitative calculation of communication delay of periodic data of EPA network, so as to get real-time indexes which EPA network could reach.It also pointed out measures to improve real-time performance of EPA network.
Research Progress of Topology Control Algorithm of Wireless Sensor Networks
ZHU Xiao-ying, LIU Xiao-wen, HU Ming
2009, 35(4): 43-45.
<Abstract>(28) <PDF>(3)
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For wireless sensor networks,topology control is a basic problem and has great influence on performance of the networks,its object is to keep network topology by using the minimum energy.The paper introduced existing topology control algorithms of wireless sensor networks in details and analyzed their advantages and disadvantages.It also studied main research directions of topology control algorithms in the future.
Research of Location Mechanism for Mobile Node in Dynamic Wireless Sensor Networks
LI Xing-chu
2009, 35(4): 46-49.
<Abstract>(26) <PDF>(2)
Abstract:
To improve accuracy of dynamic wirless sensor networks in applications of target tracking,intrusion detection,gesture measuring,enviorment minitoring and control and so on,the paper proposed a location mechanism for mobile nodes.Probability grid scheme was used to determine probability distribution of mobile nodes in monitoring area.Probability distribution of mobile nodes at the studying moment was estimated by discret samping set with weight.Method of statistical experiment was used to complete self-location of mobile nodes.The location mechanism needn’t prior knowledge of wireless sensor networks and hypothesis of mobile directions of nodes.High accurate of node location can be achieved using anchor nodes with low density,which can utilize mobile charaitnitics of dynamic nodes effectively and decrease influence of uncertain factors.The simulation results verified the validity of the location mechanism.
Analysis of Motion Stability of Main Head of Tube Alill and Its Fuzzy Optimizatio
AN Feng, SHI Li-chen, SONG Jia-hui
2009, 35(4): 49-51.
<Abstract>(16) <PDF>(2)
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Analysis Model of Gas Measurement Data Based on Monte Carlo Method
WANG Hong-gang, WU Feng-liang, CHANG Xin-ta
2009, 35(4): 52-55.
<Abstract>(21) <PDF>(2)
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Aiming at the problems that gas measuring system of coal mine couldn’t collect gas data of all tunnels,gas data collected had some non-objectivity and gas history data couldn’t be analyzed and used sufficiently,the paper proposed an analysis model of gas measurement data based on Monte Carlo method.According to topology of coal ventilation network,the model generates upriver area of gas measurement point in each tunnel, and through analyzing history measurement data of measurment point from every (one’s) upriver area,it calculates historical rule of gas emission of each tunnel.Then it uses Monte Carlo method to do random sampling with large sample to the history rule of gas emission so that to get objective rule of gas emission.On the basis,it adopts whole system balancing algorithm and gets statistical rule of gas concentration of whole coal mine.The model provides a method first time which produces unknown(`quasi-history’) data according to known history data on aspect of data processing of gas.Actual application showed that it can get `quasi-history data’ of tunnels cohere there are no measurment points if the model is used to analyze coal gas history data,and rule of gas emission and rule of gas concentration are more objective.
Research of Distributed Optical Fiber Temperature Measurement System in Freezing Monitoring
ZHAO Yu-ming, LI Chang-zhong
2009, 35(4): 55-58.
<Abstract>(45) <PDF>(3)
Abstract:
Application of Mobile Video Technology in Monitoring and Control System of Underground Locomotive Transportatio
LI Jing~, LI Yu-liang~, ZHANG Fa-qi~
2009, 35(4): 59-61.
<Abstract>(14) <PDF>(3)
Abstract:
The paper introduced hardware structure and realization of software of traditional block signal system briefly.On the basis,it proposed a scheme of applicating mobile video technology in monitoring and control system of underground locomotive transportation and its realization method.The improved monitoring and control system of locomotive transportation can display running situation of locomotive real-timely and enhances reliability of the system.Meanwhile,the system has function of video playback,which has auxiliary effect on accident rescue.Actual application showed that the system has clear video and good running effect.
Research of Security Assessment System of Coal Mine Based on AHP-FCE
LI Jin-ming~, LI Run~, QI Shang-long~
2009, 35(4): 61-64.
<Abstract>(20) <PDF>(2)
Abstract:
Security assessment is an important content of security management system of ocal mine.Combined with base theories of analytic hierarchy process(AHP) and fuzzy comprehensive evaluation(FCE),the paper proposed a new security assessment system of coal mine based on AHP-FCE.The system establishes model of hierarchy structure aiming at security assessment factors of coal mine,adopts analytical hierarchy process to build comparison matrixes and takes eigenvectors of coupled comparison matrixes as weights of security assessment.It also adopts method of fuzzy comprehensive evaluation to do comprehensive evaluation to each evaluation factor,so as to make sure influence sequencing of evaluation factors.Results of actual examples showed that the security assessment system of coal mine based on AHP-FCE has simple operation and good generality,as well its calculation results are accurate and stable.
Design of Control System of Mine-used Assembled Switches Based on Embedded System
ZHU Cheng-jie, OUYANG Ming-san, GAO Jun-ling
2009, 35(4): 65-68.
<Abstract>(14) <PDF>(3)
Abstract:
The paper introduced design of a control system of mine-used assembled switches,gave structure of software and hardware of the system and its work ways,and introduced design of software of the system and management system of upper computer in details.The control system is based on embedded technology and industrial Ethernet technology,which can realize functions such as running monitoring and control of underground switches,fault protection,network communication,display of running parameters and state and so on.Result of trial operation showed that the system is stable and reliable,and can meet control requirement of mine-used assembled switches.
Design of a High-voltage Frequency Converting System Based on IGBT
ZHU Yu-qin, ZHENG Xiao-dong, LIAO Xiao-wei, HAN Fang
2009, 35(4): 68-71.
<Abstract>(16) <PDF>(3)
Abstract:
Aiming at the problem that normal frequency converting system couldn’t do frequency converting directly to middle-voltage and high-voltage motors with lager capacity of coal mine,the paper introduced design of a high-high direct frequency converting system.It gave structure and working principle of the system,introduced design and simulation of rectification circuit and inverter circuit in details and analyzed key technology of the system design.The system has simple structure,low cost,small size and easy operation.Actual application showed that the system can save energy effectively and has high reliability,fast response speed,flexible control and small output harmonic with strong field practicability and adaptability.
Design of Intelligent Sampling and Control System for Entree Truck Coal
CUI Ya-liang~, Cui Jin-ling~, WU Hai-yan~, YANG Qing-xiang~
2009, 35(4): 72-77.
<Abstract>(24) <PDF>(2)
Abstract:
Aiming at the problems that labor intensity of manual sampling way for entree truck coal was great and only human operating mechanical sampling equipment was difficult to control falsification phenomena of entree coal,the paper introduced design of a intelligent sampling and control system for entree truck coal.The system is composed of carriage positioning and siting subsystem,coordinate transformation of sampling points subsystem,field control subsystem,database subsystem and communication subsystem,adopts digital image processing technology and improved fuzzy edge-detection algorithm to realize automatic positioning and siting of carriage and field automatic sampling control is completed by PLC when coordinate of sampling points is transferred.Practical application showed the system has high precision,good reliability,convenient operation and can meet practical need.
Research of Fault Diagnosis Method of Mine Ventilator Based on Similarity Measures of Vague Sets
LING Liu-yi, HUANG You-rui
2009, 35(4): 77-80.
<Abstract>(42) <PDF>(4)
Abstract:
Aiming at complexity and uncertainty of relation between fault characteristics and fault types of mine ventilator,the paper proposed a kind of fault diagnosis method of mine ventilator based on similarity measures of Vague sets.The method makes relation between fault types and fault characteristics vectors and fault characteristics vectors collected to be expressed with Vague sets.Through calculating and comparing similarity measures between Vague sets of fault knowledge and Vague sets of fault samples,it gets results of fault diagnosis.The application example showed that the results of applying the diagnosis method to do fault diagnosis to mine ventilator are coincided with actual situation and the method has some rationality.
Development of On-line Monitoring System for Mechanical Characteristics of High-voltage Vacuum Circuit Breaker Based on DSP and LabVIEW
ZHAO Yang~, LIU Han-yu~, ZENG Qing-jun~, QIU Yi-xin~
2009, 35(4): 81-85.
<Abstract>(41) <PDF>(3)
Abstract:
The paper proposed a design scheme of on-line monitoring system for mechanical characteristics of high-voltage vacuum circuit breaker based on DSP and LabVIEW.Data acquisition system of lower computer of the system takes DSP as core,which completes collection of mechanical characteristics parameters,current signal and vibration signal of on-off switching through sensors,signal conditional circuit and so on,and can realize display in-situ and transfer data to upper computer through CAN bus to be displayed and analyzed.Upper computer management system takes LabVIEW as development platform and uses its functions of graphic display and communication with Matlab to realize display,analysis and processing of measurement data.The field test result showed the system runs steadily with better accuracy.
Design of High-voltage (3.3 kV) Frequency Control and Monitoring and Control System of Main Fa
CHEN Ji-ying
2009, 35(4): 85-86.
<Abstract>(19) <PDF>(3)
Abstract:
Design of Hydraulic Automatic Tension Device of Belt Conveyor
YU Hui, YU Yan, SHENG Tao, SONG Lian-kai
2009, 35(4): 87-90.
<Abstract>(12) <PDF>(3)
Abstract:
On the base of analyzing advantages and disadvantages of common tension device of belt conveyor,the paper designed ZYL type of hydraulic automatic tension device and introduced its structure composition,working principle and characteristics in details.The automatic tension device adopts hydraulic technology and converts oil pressure to axial movement of piston rod,thus tension trolley is drived to longitudinal move to change tension travel.The change of tension travel is converted to movement of tension cylinder of the belt conveyor so that to change tension of the belt and insures essential friction between belt conveyor and tension cylinder.It sets electric control cabinet to control running of hydraulic tension device and realizes local control and remote control.Actual application showed the hydraulic automatic tension device has steady running,reliable performance and convenient maintenance and adjustment,which can meet requirements of all kinds of running conditions of belt conveyor.
Development of Tension Device of Belt Conveyor and Its Applicatio
DING Zheng-fa
2009, 35(4): 90-91.
<Abstract>(19) <PDF>(3)
Abstract:
Design of Control System of Semi-mobile Crushing Statio
MENG Ru, WANG Chuan-qi, WU Xiao-chun, ZHANG Wei-qin, ZHANG Jia
2009, 35(4): 92-94.
<Abstract>(20) <PDF>(7)
Abstract:
Research of Rule of Gas Distribution and Method of Gas Extraction in Goaf
SHEN Guang-hui, FAN Yan-hong, FAN Bing, DU Bing
2009, 35(4): 95-96.
<Abstract>(26) <PDF>(8)
Abstract:
Design of Spatial Analysis and Prediction System of Mine Hydrogeology Based on GIS
LIU Hui-de, ZHANG Ying, ZHAO Ren-dong, ZHAO Xin-zhuo
2009, 35(4): 97-99.
<Abstract>(24) <PDF>(3)
Abstract:
Design of Control System of Solid-liquid Pump Based on PLC
ZHANG Jing~(, 2)
2009, 35(4): 99-102.
<Abstract>(15) <PDF>(3)
Abstract:
Aiming at the problem that when solid-liquid pump run,too much or little slurry would cause conveying system to work abnormally,the paper introduced design of a control system of solid-liquid pump based on PLC and introduced its software and hardware design in details.The system uses liquid level sensors to detect liquid level information of raw material groove and storage groove.PLC controls start and stop of solid-liquid pump according to the information and does photoelectric alarm.Simulation results showed correctness and validity of the system.Field application also verified its stability and reliability.
Design of Data Collection System of Gas in Coal Roadway Based on PC104
GUO Tang-rui, CHEN Song-li, WANG Lin, JI Hai-tao
2009, 35(4): 102-104.
<Abstract>(28) <PDF>(2)
Abstract:
Design of Equipment Management System of Xinglongzhuang Coal Preparation Plant and Analysis of Its Key Technology
ZHUANG Li-yun, YU Guo-fang, JIA Dong-qing
2009, 35(4): 104-107.
<Abstract>(16) <PDF>(3)
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Design of Intelligent Protocol Converter
CHEN Hong, SHI Li-ping, GUO Yan, GAO Yang, Wen Qua
2009, 35(4): 107-109.
<Abstract>(11) <PDF>(3)
Abstract:
Design of Control Board of Automatic Testing System for LNB Based on LabVIEW
LU Yi~, LU Xu-ming~
2009, 35(4): 109-112.
<Abstract>(17) <PDF>(2)
Abstract:
It is important to test low noise block downconverter for assuring quality of whole network.The paper introduced design of a control board of automatic testing system for LNB based on LabVIEW.The control board takes 8255 chip as control core and controls position movement of tested LNB and signal switch.And it takes LabVIEW as development platform to program drive of control board and simulates returning end signal of positioning at one time.Trial running result showed that the control board can realize positioning of tested LNB and signal switch and display positioning status of tested LNB real-timely.
Design of Monitoring and Control System of Local Ventilation in Mine
GUO Qing-kai
2009, 35(4): 112-114.
<Abstract>(19) <PDF>(5)
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Control of Mimic Board Display Based on Technology of Dynamic Data Exchange
JIA Min-zhi, MENG Hao, YANG Chun-xia
2009, 35(4): 114-115.
<Abstract>(35) <PDF>(3)
Abstract:
Research of Process Control System for Coment Productio
XIE Qing-hua
2009, 35(4): 116-117.
<Abstract>(42) <PDF>(2)
Abstract:

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