2011 Vol. 37, No. 12

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Cover Catalogue
Design of Mine-used M2M Terminal System Based on WCDMA
LI Ji-lai, WANG Xiao-chen
2011, 37(12): 1-4.
<Abstract>(48) <PDF>(8)
Abstract:
In order to transfer information of underground personnels, devices and environment to information center of coal mine through existing underground communication network, the paper put forward a design scheme of mine-used M2M terminal system based on WCDMA, and introduced hardware and software design of the system in details. The system realizes functions of information acquisition of underground targets, human-computer interaction operation and data communication, and realizes Internet of Things of things and things, things and people, and things and network by transmitting data through WCDMA.
Automatic Hydraulic Braking System of Mine-used Vehicle
JIANG Shi-wen, ZHANG Da-nü
2011, 37(12): 5-7.
<Abstract>(46) <PDF>(8)
Abstract:
In view of requirement of over-speed protection or rope breaked protection of underground track haulage, the paper put forward a solve scheme of automatic hydraulic braking system of vehicle. It introduced principle, functions of components of the system. The system uses high-precision hydraulic valve to test, extract, filter, amplify, choice speed signal of tram, then to complete clamping rail brake through brake valve. The practical application showed that the system can on-line measure speed of tram and has advantages of stable and reliable working, high measurement accuracy, easy operation, long working life.
CDMA Wireless Communication System of Coal Mine Based on the Telecom Public Network
GU Yi-dong
2011, 37(12): 8-10.
<Abstract>(58) <PDF>(6)
Abstract:
The paper introduced a mine-used CDMA wireless communication system based on the Telecom Public Network. The system introduces the Telecom Public Network CDMA signals into coal mine underground and makes integration of the Telecom Public Network CDMA signals and underground CDMA signals, which can ensure covering wireless signals in mine area and meanwhile the mobile phone users can freely roam in whole country. The system can also expand functions of PTT talkback, data and video communication, remote monitoring and management of hidden danger with mobile phone on CDMA network platform.
Design of Digital Voice Conversational Terminal of Coal Mine Based on LWIP
BAO Jian-jun, XU Wei, LUO Ke
2011, 37(12): 11-14.
<Abstract>(68) <PDF>(7)
Abstract:
Based on analysis of function limitation of underground speak telephone system, a novel scheme of digital voice conversational terminal of coal mine with network interface based on open-source LWIP protocol stack was proposed, the terminal's application function, hardware composition and software model were introduced, the LWIP protocol stack and its transplanting to FreeRTOS embedded operating system were described, and design points of LWIP in applications layer of the terminal were analyzed. The terminal has functions of digital broadcasting and talkback, uses standard RTP protocol, and supports voice interaction with 8 kHz and 16 kHz sampling frequencies and on-line streaming broadcasting of MP3 with up to 44.1 kHz sampling frequency. Feasibility and effectiveness of the scheme were verified by experiment results.
Bearing Monitoring and Diagnosis System of Belt Conveyor of Coal Mine and Its Applicatio
LI Zhen, CAO Hong, JIA Hong-gang, FAN Xu-feng
2011, 37(12): 15-18.
<Abstract>(55) <PDF>(10)
Abstract:
To solve problem of bearing fault diagnosis for belt conveyor of coal mine, a design scheme of new bearing monitoring and diagnosis system of belt conveyor of coal mine was put forward. The system takes vibration monitoring analyzer and vibration acceleration sensor as core and combines with database server and KingView software, and realizes functions of signal acquisition and processing of vibration and temperature, real-time analysis and intelligent diagnosis, trend analysis and report generation of bearing of belt conveyor. The actual application showed that the system can monitor and diagnose condition of bearing of belt conveyor of coal mine and meets requirements of real-time and accuracy in condition monitoring and on-line diagnosis of belt conveyor of coal mine.
2011, 37(12): 18-20.
<Abstract>(37) <PDF>(4)
Abstract:
Research of Technologies of Water Level Detection for Water Supply and Drainage System
LIU Liang, DENG Shi-jian, ZHANG Jian, HU Yuan-yuan
2011, 37(12): 21-24.
<Abstract>(37) <PDF>(8)
Abstract:
The paper introduced principle, characteristics and applicable situation of water level detection of float type, capacitive type, pressure type, ultrasonic wave type and bubble type. It indicated that the technologies of water level detection have different characteristics: float type water transmitter is suitable to detect water level of water tower and reservoir with the maximum water of depth 6 m and clear water quality; capacitive type water transmitter is suitable to detect water level of rivers and lakes with clear water quality, big diameter of water container and deep water level; pressure type water transmitter is suitable to detect water level of well with smaller diameters of water container; ultrasonic wave type and bubble type water transmitter need be chosen carefully with complex structure and high cost although they overcome influence of water quality on measuring accuracy.
2011, 37(12): 24-26.
<Abstract>(36) <PDF>(13)
Abstract:
Application Research of Networking System of Coal and Gas Outburst
WANG Yong-qiang
2011, 37(12): 27-31.
<Abstract>(34) <PDF>(6)
Abstract:
The paper introduced overall structure and networked data formation of networking system of coal and gas outburst. The system obtains comprehensive analysis indexs for judgment of coal and gas outburst accident through analyzing and calculating of close relationship of coal structure, ground pressure activities and gas rate, so as to predict and prevent accidents. The practical application showed that the system realizes function of prediction of coal and gas outburst.
Statistical Analysis Method of Gas Monitoring Data and Its Applicatio
ZHANG Jian-rang, SHEN Qing-tao, CHANG Xin-tan
2011, 37(12): 31-34.
<Abstract>(54) <PDF>(4)
Abstract:
In view of problems of data redundancy and uncertainty caused by mass data of mine gas monitoring and control system，the paper put forward a statistical analysis method of gas monitoring data. For historical data known time series, firstly, the method uses Matlab toolbox to draw histogram and cumulative graph of probability density function and cumulative distribution function to obtain statistical characteristics; secondly, it uses Crystal Ball software CB Predictor tool to assess the historical monitored data and to predict their future trends; finally, it analyzes the predicted result and obtaines detailed reports of forecasting method.
Optimal Routing Algorithm in WSN Based on Maximi
WANG Xiao-yong
2011, 37(12): 34-39.
<Abstract>(53) <PDF>(4)
Abstract:
Wireless sensor networks are composed of energy-constrained nodes. Therefore, it is to design routing algorithms to optimize energy usage of nodes. In view of the maximizing network lifetime, the paper put forward an optimal routing algorithm based on the maximin model, defined data transmission matrix, and designed selection system of nodes for avoiding possible routing loops. Based on energy consumption for sending and receiving data and available residual energy of nodes, it designed mathematical programming model to find optimal routing, so as to optimize data sent routing paths and data sent volume and balance energy consumption of nodes. The simulation results showed that the algorithm can balance the energy consumption of nodes effectively and extend network lifetime.
Research of Mathematical Model of Photovoltaic Array Based on Matlab
WANG Zhuo-ling, LI Xiao-ying
2011, 37(12): 40-43.
<Abstract>(44) <PDF>(2)
Abstract:
Through research of single physical model for photovoltaic array, the paper gave a mathematical model of photovoltaic array easy to solve and simulate, which can calculate I-V characteristics of photovoltaic array at any temperature and solar radiation intensity. Based on the model, it also gave calculate formula at the maximum power point in allowable error of project. The Matlab simulation result of the mathematical model showed that output characteristics of the photovoltaic array vary with temperature and light intensity, moreover , I-V and P-V characteristics of the photovoltaic array is nonlinear; in different light intensities and temperatures, the output of the maximum power point is different , which can reflect actual characteristics of photovoltaic array.
Research of Health Diagnosis Strategy with Neural Network of Vacuum Circuit Breakers of 10 kV Switchgear
HE Lan, LIU Xing, WANG Dan-dan
2011, 37(12): 43-47.
<Abstract>(62) <PDF>(6)
Abstract:
In order to solve problems of lack maintenance and blind repair existed in vacuum circuit breakers of 10 kV switchgear , the paper put forward a health diagnosis strategy of vacuum circuit breaker of 10 kV switchgear based on RBF neural network on basis of analysis of fault type and portent. The strategy uses sensor to extract characteristic parameters of vacuum breaker, obtains characteristic quantity of state of health, and takes these characteristic quantities as input of RBF network to diagnose health condition of vacuum circuit breaker, so as to achieve preventive goal. The simulation results by Matlab proved effectiveness of the strategy.
Research of a Combined Model of Power Flow Calculation and Re-scheduling Generation Based on Operational Reliability
YANG Fei-hu, SU Bo-xia
2011, 37(12): 48-51.
<Abstract>(30) <PDF>(3)
Abstract:
In view of problems of off-line reliability evaluation, the paper proposed a combined model suitable for on-line algorithm for operational reliability evaluation process through research of model of power flow calculation and re-scheduling generation. The combined model not only meets need of engineering applications in aspect of calculation accuracy, but also more importantly shows better performance in aspect of time consumed for calculation through tests with RTS-24 standard system and a real provincial power grid system, which has great practical value in engineering applications.
Research of Control Strategy of Induction Motor Based on Sliding Mode Variable Structure
HUANG Wen-tao
2011, 37(12): 52-55.
<Abstract>(46) <PDF>(2)
Abstract:
Induction motor is a high-level, non-linear, strong coupled and multi-variable system. When it's running, its parameters are influenced by temperature and load and caused the motor to run into unstable region. To adapt to its non-linear system property, a control strategy based on sliding mode variable structure was proposed. Sliding surface was established corresponding to current, rotate speed, flux error, variable structure controller of each link was constructed, and self-adaptive control law was derived. The simulation results showed that the control strategy has effectiveness and feasibility.
Simulation Research of Low-voltage Ride Through Technology of Direct Drive Type Wind Power System
HAN Guo-qing
2011, 37(12): 56-59.
<Abstract>(43) <PDF>(2)
Abstract:
The paper gave topological structure of permanent magnet direct drive type wind power system, analyzed working principle and topological structure of DC unloading circuit, established model of permanent magnet wind power system, and constructed simulation model of low-voltage ride through technology of permanent magnet direct drive type wind power system based on DC unloading circuit on Matlab/Simulink platform. The simulation result proved feasibility and good ride through capability during low-voltage ride through of the system. The system is foundation of product realization.
Design and Simulation of FIR Digital Filter Based on Matlab
YIN Yu-xing, LIU Zhen-jian, XIANG Zhi-wu
2011, 37(12): 60-63.
<Abstract>(45) <PDF>(3)
Abstract:
The paper analyzed principle of FIR digital filter and introduced implementation process of designing FIR digital filter with Window function method. Matlab simulation verified that parameters of designed filter can be adjusted according to repuirment to achieve desired filtering function. The design is simple and convenient, and has strong applicability.
Research of Three-level PWM Rectifier Based on Improved SVPWM Algorithm
ZHANG Jie, WANG Bin, WANG Feng
2011, 37(12): 63-67.
<Abstract>(58) <PDF>(5)
Abstract:
Topdogical structure of neutral-point-clamped three-level rectifier was analyzed. A mathematical model of the rectifier was established based on switching function in d-q frames. On the basis, current d-q decouple control was realized by means of dual closed loops control, so dynamic performance of the rectifier was improved. In view of shortcoming that there are a large number of trigonometric calculations in determining sector and solving action time of space vector in traditional SVPWM algorithm, a SVPWM algorithm based on non-orthogonal 60°coordinate system was proposed. The algorithm optimizes vector calculation of the three-level rectifier. The results of simulation and experiment valified correction of the algorithm.
Probe on Problem of Coal Mine Monitoring Data Integratio
CHEN Zhen-jiang, WANG Yong
2011, 37(12): 67-70.
<Abstract>(82) <PDF>(3)
Abstract:
Coal mine monitoring data integration is necessary premise of comprehensive utilization of coal mine data. The paper discussed problems of data integration protocol, data integration methods, agreement of data compression and data recover of coal mine monitoring data integration, and proposed corresponding solutions.
Design of Noise Measuring Instrument and Its Implementatio
ZHAO En-biao, LIU Wei-dong, DENG Nan
2011, 37(12): 71-73.
<Abstract>(58) <PDF>(4)
Abstract:
In view of noise hazard of coal mine underground, the paper proposed a design scheme of noise measuring instrument based on STC single-chip microcomputer, and introduced hardware and software design of the instrument. The test results showed that the instrument realizes accurate measurement of noise level, measurement error is less than ±1.25%, which reaches 2-level of sound level meter.
Design of Mine-used Multi-function WiFi Signal Converter
SUN Gang, LIU Wei, JING Zhen-xing
2011, 37(12): 74-75.
<Abstract>(61) <PDF>(4)
Abstract:
The paper introduced composition and signal transform mode of mine-used multi-function WiFi signal converter.The converter uses wireless antenna to receive and transmit wireless signals, and realizes mutual change of wireless signal and wire signals of RS485, Ethernet port, sensor and voice port, so as to expediently realize interconnection among various interfaces of mine monitoring device, and effectively slove compatibility problem among various kinds of monitoring systems and communication systems.
Development of Inquire Subsystem of Process Mineralogy
DENG Hai-bo, WANG Na
2011, 37(12): 76-78.
<Abstract>(50) <PDF>(2)
Abstract:
In view of requirements of searching mineralogy data in minerals processing research, an inquire subsystem of process mineralogy was developed by use of Microsoft Visual Studio 2008, SQL Server 2005 and Power Desinger as development tools, and a minerals informatiom database was constructed. The subsystem can offer a series of process mineralogy data and great convenience for gathering data, which has certain practical value.
2011, 37(12): 79-81.
<Abstract>(37) <PDF>(7)
Abstract:
Application of RIA Technology in Construction of Coal Mine Safety Management Information System
HAN Liang, CAO Xia
2011, 37(12): 82-84.
<Abstract>(47) <PDF>(4)
Abstract:
A coal mine safety management information system was designed and realized with RIA technology, and structure, working process and main function of the system were introduced. RIA has advantages of good user experience of desktop software and easy deployment of Web applications program, and can make develop platform of coal mine safety management information system simply and quickly, and interface be beautiful.
Design of Management System of Coal Mine Digging Linking and Its Implementatio
HAN A
2011, 37(12): 84-86.
<Abstract>(31) <PDF>(4)
Abstract:
Characteristics of coal mine digging linking and importance of management of the digging linking were analyzed, a kind of digital management system of digging linking based on WebGIS was designed, and structure, implementation and function of the system were introduced. The system integrates digging plan,linking of working face of production process and analysis and prediction of production volume together, and realizes organically integration of coal resources, farthest protects existed mine resources, and provides an integrated solution scheme to realize active control, running and optimal management of production plan and actual production of coal enterprises.
2011, 37(12): 87-89.
<Abstract>(35) <PDF>(3)
Abstract:
Application of Automation Control System of Coal Screening and Transportatio
QIAO Kun-yuan, YAN Jun, HU Cheng-yong
2011, 37(12): 90-92.
<Abstract>(81) <PDF>(3)
Abstract:
The paper put forward a reform scheme of coal screening and transportation system with automation control system according to current situation of a coal mine. It introduced selection principle of automation control system of coal screening and transportation systems, gave composition, main configuration and application of automation control system in a coal mine. The actual application showed that the automation control system has advantages of good real-time performance, high reliability, low failure rate, which improves production efficiency and ensures safe production of coal mine.
Dynamic Monitoring System of Coal Mine Main Lifting Equipment
MA Guang, SHI Er-ting, QU Li-wen, MA Shu-hua, GUO Jin-long, DONG Jun-hao, WU Guang-shuai
2011, 37(12): 93-95.
<Abstract>(44) <PDF>(3)
Abstract:
In view of problems of single monitoring existed in traditional condition monitoring systems of coal mine main lifting equipment, the paper proposed a design scheme of dynamic monitoring system of lifting equipment. The system realizes real-time monitoring of dynamic tension of steel wire rope, broken wire monitoring of steel wire rope and on-line monitoring of distance shaft guide, which provides guarantee for safe operation of lifting equipment.
Design of Automatic Location System of Sampling Head of Bridge-type Sampler
DOU Quan-qi
2011, 37(12): 95-97.
<Abstract>(57) <PDF>(3)
Abstract:
In view of defect that location way of sampling head of traditional bridge-type train coal sampler is inaccuracy, an automatic location system of sampling head of bridge-type train coal sampler was designed based on PLC and shaft encoder according to detection principle of encoder for location and speed of equipment. The hardware configuration and software diagram of the system were given. The system can accurately calculate position and speed of the sampling head by detecting pulse signal of the shaft encoder, and can real-time display numerical value on HMI through touch panel and embedded configuration software.
Research of 3D Personnel Positioning and Information Management System in Coal Mine Underground
WANG Bao-de
2011, 37(12): 98-100.
<Abstract>(50) <PDF>(3)
Abstract:
The paper introduced composition, working principle, function and key technologies of 3D personnel positioning and information management system in coal mine underground.The system adopts technolgies of radio frequency identification, ZigBee and 3D to real-timely recognize and track underground personnel, and carry on data collection and transmission through computer network. It can also simulate virtual reality of mine personnel checking, distribution state and movement track, which can provide reliable position information for mine personnel's rescue after taking place accident to improve efficiency of rescue and relief work.
2011, 37(12): 101-103.
<Abstract>(52) <PDF>(3)
Abstract:
Electrical Parameter Acquisition System Based on S7-300/200 PLC and Modbus Protocol
XU Peng-peng
2011, 37(12): 104-107.
<Abstract>(34) <PDF>(4)
Abstract:
The paper introduced hardware structure of electrical parameter acquisition system based on S7-300/200 PLC and Modbus protocol and design of program of S7-200 PLC, and expounded process that S7-300 PLC reads electrical parameters stored in S7-200 PLC through MPI communication. The practical application showed that the system is simple and convenient in application, stable and reliable in running, which has certain reference value in engineering.
Reform of 220 kV GIS SF6 Pressure Protectio
MENG Xiang-xi
2011, 37(12): 108-111.
<Abstract>(72) <PDF>(3)
Abstract:
The paper introduced general situation of GIS SF6 pressure protection,analyzed problems of design defect and faulty start existed in GIS SF6, discussed reform necessity.Taking bus-tie switch 2245 as example, it put forward a reform scheme used PLC for GIS SF6 and gave some further suggestions of optimal protection of GIS SF6. The reformed bus couple jumping with bus has selectivity, prevents accident to be expanded.
Reform of Automation Control of 73-01-K4 N032 Type Centrifugal Ventilator
WANG Hai-sheng, LI Chao, WANG Bo
2011, 37(12): 111-113.
<Abstract>(40) <PDF>(4)
Abstract:
In view of problems of low measuring accuracy, few functions and high fault rate existed in original control system of ventilator, a reform scheme using automation control technology was put forward. The reformed electric control system of ventilator achieves functions of remote and centralized control and management, on-line monitoring of some parameters and networking. The result of practical application validated reliability of the reform scheme.
Reform of Mine Low-voltage Feed Switch
LU Wei-feng, LI Da-feng, LIU Wan-de
2011, 37(12): 114-115.
<Abstract>(52) <PDF>(4)
Abstract:
In view of problems that there is less protection functions, data upload failure, big error, and no fault recorders existed in current mine-used low-voltage feed switch, the paper proposed a reform scheme by use of a new type of comprehensive protector, namely replacing built-in integrated protector of low-voltage feed switch, reconstructing accessories and wiring of feed switch, so as to ensure accurate, real-time uploading of power monitoring data and realize functions of remote operations such as opening/closing operation, reset, leakage and others. And it meets demands of power monitoring and management system.
Reform of Integrated Automation of 35/6 kV Coal Mine Substatio
CUI Bao-liang
2011, 37(12): 116-118.
<Abstract>(68) <PDF>(3)
Abstract:
Taking Gequan Coal Mine as example, the paper proposed an improved scheme of automation technology of 35/6 kV coal mine substation. Through reform of integrated automation, the substation realizes functions of relay protection and control, remote operation, metering, fault recording, data processing and five anti-lock operation, on-line monitoring, which meets with need for later post-expansion and reform of substation line.
Design of Network Monitoring and Control System Based on SOPC Technology
YUWEN Hui-biao, CHEN Ye, CHEN Wei
2011, 37(12): 118-122.
<Abstract>(36) <PDF>(5)
Abstract:
In view of problems of high packet loss rate and bad expandability existed in traditional network monitoring and control system because of adopting centralized control way, the paper put forward a design scheme of network monitoring and control system based on SOPC technology. It introduced hardware platform and software design of the system in details. The testing data validated feasibility of the system.
Application of XML in High Speed Data Access Interface
XU Wei, XU Qi, CHEN Hai-dong
2011, 37(12): 123-125.
<Abstract>(36) <PDF>(3)
Abstract:
The IEC61970 standard provides component interface specification (CIS) of high speed data access (HSDA), but does not provide specific provisions of data format, so manufacturers have different custom formats to cause problem of disunion data format and isomerism application systems. To solve the problem, the paper put forward a scheme with XML technology and mainly introduced how to use XML to realize unified data format in HSDA.

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