2011 Vol. 37, No. 7

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Cover Catalogue
Design of Wireless Tracking and Positioning System of Underground Personnel Based on WiFi and ZigBee
JIANG Lei, YU Lei, WANG Zhen-chong, ZHANG Yi-chi
2011, 37(7): 1-6.
<Abstract>(68) <PDF>(5)
Abstract:
In order to solve problems of high cost, complex installation and limitation of zone location of current mine personnel positioning system, the paper put forward a design scheme of wireless tracking and positioning system of underground personnel based on WiFi and ZigBee and a real-time positioning method based on one-dimensional linear space which is perfectly fit for realistic requirement of mine underground, and introduced designs of hardware and software of the system in details. The system uses WiFi technology to construct wireless voice local network, uses ZigBee technology to construct wireless sensor monitoring network, and achieves coverage of real-time communication signals and positioning signals through integrated substations which can transmit WiFi and ZigBee signals simultaneously. The system has been applied with a good effect.
Design of Signal Transmission of Mine Locomotive Based on Leakage Communication Technology
WEI Zhen, LI Chao-hai, TANG Jun, TANG Zhao-guang, ZHAO Hui-jun
2011, 37(7): 6-8.
<Abstract>(47) <PDF>(6)
Abstract:
The paper proposed a design scheme of signal transmission of mine locomotive based on leakage communication technology, and focused on how to send state information encoded into DTMF signals of the locomotive to certain handset and display the state information in text fast, accurately and real-timely through leakage communication platform. The scheme realizes wireless transmission of locomotive signals, and can improve security of underground locomotive transport and safety management capability of underground locomotive deployment and transport. The actual application showed the feasibility and effectiveness of the scheme.
Design of Information Authentication System of Driver of Rubber-tyred Vehicle
LIU Li-jing
2011, 37(7): 9-11.
<Abstract>(58) <PDF>(5)
Abstract:
An information authentication system of driver of rubber-tyred vehicle based on MF RC522 was designed and constitution, working principle, radio frequency chip MF RC522 and design of radio frequency antenna circuit of the system were focused on. The system realizes authentication of driver information by reading information from a non-contact key-card to determine whether the driver satisfies driving requirement, and provides a basis for development of driver information management system.
Design of Frequency-conversion Speed-regulation Device of Continuous Shearer
MAO Jin-liang
2011, 37(7): 11-14.
<Abstract>(28) <PDF>(5)
Abstract:
Design schemes of hardware and software of a frequency-conversion speed-regulation device of continuous shearer were introduced. Firstly the vector frequency converter was selected according to requirements of continuous shearer on frequency converter, then designs of main circuit, control circuit, leakage protection circuit, radiate module and software of the device were discussed in details. The device realizes motion control of continuous shearer. The field application indicated that the device is practical and reliable and has easy maintenance.
Design of Acquisition and Analysis System of Load Data of Bolt and Cable
HUANG Jin-bo, LIANG Peng, WANG Qing-niu, WANG De-wei
2011, 37(7): 15-18.
<Abstract>(60) <PDF>(5)
Abstract:
A new acquisition and analysis system of load data of bolt and cable was designed considering disadvantages of low accuracy, difficult reading and low efficiency of current methods of acquisition and analysis of bolt and cable of load data. The load data is acquired by wireless transmission technology and then analyzed by software. The system can improve accuracy of data analysis and provides a more scientific basis for determining safety of tunnel supporting.
Modeling Research of Coal Mine Disaster Predicting System Based on Markov Chai
GUO Qiu-min, XU Bo
2011, 37(7): 18-23.
<Abstract>(52) <PDF>(6)
Abstract:
The paper proposed an opinion of constructing mathematics models which accords with characters of Marcov chain according to characteristics of coal mine, and used Marcov chain as a basic analyzing tool to describe mathematics modeling methods in three fields including fault analysis of electromechanical equipments, early warning analysis of underground waterbursting, and forecasting analysis of emergency rescue in details. The constructed models can predict probability of equipment faults, probability of underground waterbursting and escape situation after emergency, which provides probable data for coal mine disaster predicting and theory support for technology realization of coal mine disaster predicting system.
Renovation and Optimization of Operation Mode of Dual-circuit Power Supply System in Coal Mine
LI Fu
2011, 37(7): 24-26.
<Abstract>(51) <PDF>(6)
Abstract:
For the problem that most dual-circuit power supply systems in coal mine underground could not accord with requirements of version 2009 of Coal Mine Safety Regulations, the paper presented a way of renovation and optimization of operation mode of dual-circuit power supply system, and pointed out that dual-circuit power supply system which uses parallel operation mode still has a problem of uneasy switchover caused by electric resetting and the problem should be further researched.
Probe on Fully Distributed Control Structure of Coal Preparation Plant
XING Mei-su, HOU Lu-jun
2011, 37(7): 26-28.
<Abstract>(35) <PDF>(5)
Abstract:
A fully distributed control structure consisted of intelligent motor control center, local intelligent control box, intelligent instrument and intelligent electric actuator was presented for disadvantage of current centralized control system of coal preparation plant caused by seperation of distribution equipments and control devices, and development and correlated products of intelligent motor control center and intelligent instruments were introduced in details. The structure can achieve integration of power distribution and control, and improve system reliability and production management level.
Probe on Design of Management Information System of Coal Preparation Plant
ZHOU Guo-bi
2011, 37(7): 29-32.
<Abstract>(35) <PDF>(5)
Abstract:
The paper analyzed requirements and design idea of management information system of coal preparation plant, introduced functions of each subsystem and notices of code design, displayed human-machine interfaces of the subsystems, and summarized development trend of the management information system.
Brief Analysis of Leakage Protection System of Coal Preparation Plant
ZHANG Bo, LI Yan-chong
2011, 37(7): 32-33.
<Abstract>(52) <PDF>(6)
Abstract:
The paper analyzed hazards of leakage and current status of leakage protection system of domestic coal preparation plant, and put forward proposals that coal preparation plant should construct leakage protection system.
Current Situation and Development Trend of Database Technology
ZHANG Jun, WU Shao-hui
2011, 37(7): 34-36.
<Abstract>(38) <PDF>(4)
Abstract:
Six stages of database system design were introduced which includes requirements analysis stage, concept and structure design stage, logic structure design stage, physical structure design stage, implementation stage, and stage of operation and maintenance. Then current research situation of database system was described by examples of distributed database system, knowledge base system and active database system. Finally, current research focus and development trend were pointed out combining with introduction of data warehouse, engineering database, statistical database, space database, etc.
Research of Routing Protocol for Wireless Sensor Network in Mine Gob Area
XI Qiang, ZHU Jin-guang
2011, 37(7): 37-40.
<Abstract>(48) <PDF>(7)
Abstract:
A suitable routing mechanism for wireless sensor network in mine gob area was designed.Firstly, LEACH cluster heads selection mechanism was improved by adding remaining energy parameter to threshold function,then a routing algorithm of wireless sensor network was designed with the improved protocol and multi-path routing mechanism. Finally,three experiments were given with NS-2 network simulation platform. The experimental results showed that the improved protocol has improved energy efficiency of nodes and extended life cycle of network.
Probe on Feasibility of Application of Multi-point Optical Fiber Gas Sensor System in Coal Mine
JIANG Ze, LIU Mao-rong
2011, 37(7): 41-44.
<Abstract>(48) <PDF>(4)
Abstract:
The paper introduced structure and working principle of optical fiber gas sensor,and introduced working principle and new technologies of direct detection and tunable diode laser spectroscopy of multi-point fiber gas sensor system OptoSniff. The laboratory test results showed that the system has advantages of long transmission distance,fast response,high accuracy,and no periodic calibration. There is still a problem in application of the system in coal mine,namely the system can’t achieve in-place sound and light alarms.
Research of Layered Overlay Multicast Technology Based on Immune Algorithm
ZHAO Liang, HE Yao-yi, WANG Yong, CHEN Xiao-li
2011, 37(7): 44-49.
<Abstract>(46) <PDF>(2)
Abstract:
In order to solve problems of wasting network bandwidth and server overload existed in traditional real-time streaming data transmission mode of unicast and IP multicast,the paper put forward a method of building multicast tree of application layer of overlay network based on immune algorithm. The method uses immune algorithm to divide multicast island and select multicast service nodes with the minimum system cost by taking round trip time of links and degree of nodes as constraints,and realizes the global optimal selection of multicast service nodes. The simulation results showed the method is effective,and has faster convergence speed and better search ability than traditional genetic algorithm.
Analysis of Delay of Message Transmission of Profibus-DP Single Master-station System
KONG Wei-she
2011, 37(7): 50-53.
<Abstract>(61) <PDF>(2)
Abstract:
The paper used determinate and stochastic Petri net to establish a model of message transmission delay of Profibus-DP single master-station system and did simulation analysis in TimeNet software. It got relationship between message transmission delay and target-token cycle time and gave a method of setting target-token cycle time reasonably according to parameters of Profibus-DP in actual projects taking STEP7 software as an example,so as to make monitoring and control system get better real-time performance. The simulation result showed correctness of the model.
Speed Measuring Method of Underground Locomotive Based on Image Processing Technology
ZHANG Chuan-kai, LI Yu-liang, LIU Jing-yua
2011, 37(7): 53-56.
<Abstract>(70) <PDF>(4)
Abstract:
A new speed measuring method for underground locomotive based on image processing technology was proposed to solve problems of high cost and fault rate of traditional method using sensors to measure speed. Firstly the centroid coordinate of template is obtained by template matching,then the moving distance of the template in two consecutive pictures is got by using the change of the centroid coordinate in the pictures. The moving distance is transformed into actual driving distance of locomotive through scale coefficients next,and the speed of the locomotive is calculated according to time gap between the two pictures. The experiment showed that the method can determine speed of locomotive real-timely and has a reliable performance.
Low-speed Sensorless Control Technology of PMSM Based on Dual PWM Regulators
REN Ju-yong, GU Shan-mao
2011, 37(7): 57-61.
<Abstract>(52) <PDF>(5)
Abstract:
In order to improve the poor performance of sensorless control of PMSM using extended Kalman filter at low speed,the paper proposed a novel low-speed sensorless control technology of PMSM based on dual PWM regulators. The technology takes DC part before the inverter into the adjustment range and realizes demand-based regulation of DC bus voltage according to given speed and torque. At the same level of output voltage,the case of using dual PWM regulators and the one of using fixed DC bus voltage were simulated in Matlab/Simulink,and the simulation result was verified by DSPACE 1103 system. The experimental results showed that extended Kalman filter system can get good control performance at low speed by use of dual PWM regulators.
Application Research of Image Processing in Gas Monitoring of Coal Mine
WANG Meng, LI Yu-liang, WANG Qing-fei
2011, 37(7): 61-64.
<Abstract>(79) <PDF>(6)
Abstract:
There are problems in gas monitoring using portable gas alarm in working face of coal mine,such as gas concentration reporting is tedious and boring. In the paper,camera was used to monitor portable gas alarm real-timely and methods of image processing and automatic identification of images collected by the camera were also put forward. The specific processes in automatic identification of gas concentration including image preprocessing,detection of image edge,and segmentation of displaying region of gas concentration were introduced in details,namely using image graycale method and mid-value filtering method to preprocess the monitored images,using Roberts operator,Prewitt operator and Sobel operator to extract image edges separately and using Hough transformation to detect straight lines of the edge, so as to segment target images.
Research of Fully Automatic Control System of Rapid Quantitative Loading Statio
SUN Guo-shun, ZHANG Xin, QI Mei
2011, 37(7): 65-67.
<Abstract>(81) <PDF>(8)
Abstract:
The paper studied automatic control technologies of feeding system, batching system and loading system of rapid quantitative loading station, and used Matlab to do simulation experiment. The simulation results showed validity and correctness of the control technologies. The paper provides a reference for optimizing design of fully automatic control system of loading station.
Application Research of SVM in Risk Assessment of Coal Marketing
JIA Yan-feng, WANG Chun-lei, XIE Hai-dong, WANG Zhi-dong
2011, 37(7): 68-71.
<Abstract>(57) <PDF>(6)
Abstract:
Statistical learning method of support vector machine and its application in risk management of coal marketing were introduced according to characteristics of coal marketing management. The experiments showed that the method can evaluate credit risk of customers and help coal enterprises to select quality customers, which offers decision basis to coal enterprises for actively preventing and avoiding marketing risks.
Application Research of SQLite Database in Modern Information Management of Coal Mine
TAO Ye
2011, 37(7): 72-75.
<Abstract>(79) <PDF>(4)
Abstract:
In view of problems of complex operation and high maintenance cost existed in application of large databases in modern information management of coal mine, the paper proposed a scheme of modern information management of coal mine by use of SQLite database. It introduced basic structure and characteristics of SQLite database and gave simulation analysis of the scheme. The test result showed that SQLite database can fully play advantages of high efficiency and useability for portal website and office automation system in modern information management of coal mine, but SQLite database has certain limitation for gas monitoring and control system which needs a lot of concurrent operation.
Identification Method of Coal and Rock Interface Based on PCA
HE Jia-jian, CHEN Zhuo, WU Meng-tong, RONG Liang, GONG Fu-zhang, MENG Hai-gang
2011, 37(7): 76-78.
<Abstract>(58) <PDF>(6)
Abstract:
An identification method of coal and rock interface based on principal component analysis was proposed, and principle of principal component analysis and identification process was described in details. The method uses multiple sensors to monitor parameters simultaneously of shearer when the shearer is cutting coal, and does real-time principal component analysis of the parameters. The coal and mine interface is identified by capturing exceptions in cutting course according to statistics of HotellingT2 and SPE which were established with main meta information. The practical application showed that the method can identify coal and rock interface rapidly and accurately.
Design of System of Mine Emergency Rescue and Information Release
BAO Yong-tao, CHENG Wei-gang
2011, 37(7): 79-81.
<Abstract>(263) <PDF>(3)
Abstract:
A design scheme of system of mine emergency rescue and information release was proposed, and the system structure, design of key devices, and system functions were described in details. The system makes up the shortage of current collection systems which collect information from underground to the ground and provides a top-down channel for information release and an effective support for mine emergency rescue.
Design of Dormancy and Wake-up Device Based on MSP430
QIN Wei
2011, 37(7): 82-84.
<Abstract>(80) <PDF>(3)
Abstract:
According to the shortcoming of short working time of battery-powered network video server in mine-used rescue command device, MSP430 with low-power consumption was used to realize a dormancy and wake-up device. The device can prolong service time of the battery of network video server and make multi-rescue and continual operation possible.
Brief Discussion of Structure Design of Mine-used Electrical and Electronic Equipments
XIE Wei-xian, HU Lin-fe
2011, 37(7): 85-88.
<Abstract>(41) <PDF>(5)
Abstract:
The paper introduced basic contents of structure design of mine-used electrical and electronic equipments, pointed out problems which need paying attention to during design by examples, and analyzed problems of working environment and human-machine engineering in details and corresponding solutions. The paper provides reference for structure design of mine-used electrical and electronic equipments.
Design of Temperature Monitoring Node Based on Wireless Sensor Network
WEN Yang-dong, ZHANG Yu-feng, ZHU Mi
2011, 37(7): 89-92.
<Abstract>(32) <PDF>(4)
Abstract:
A design scheme of temperature monitoring node of real-time temperature monitoring system for high-voltage electrical equipments based on wireless sensor network was introduced. The node is consisted of microprocessor MSP430F2012, temperature sensor DS18B20 and wireless transceiver controller nRF24L01. In process of temperature monitoring, the temperature sensor collects temperature data regularly and sends the data to the microprocessor for processing, then the node sends real-time temperature data to base station through the wireless transceiver controller. The node achieves real-time monitoring of high-voltage electrical equipment, satisfies the demand on low power consumption, and improves stability of the equipments and reliability of the monitoring system.
Setting Calculation Method of Microcomputer Protection for Main Transformer of Coal Mine
LI Qing-yang
2011, 37(7): 93-98.
<Abstract>(75) <PDF>(3)
Abstract:
A setting calculation method of microcomputer protection for mine-used main transformer was introduced with an example of a main transformer of a large-scale coal mine. Firstly, the short-circuit current was accurately calculated by normalized value method and verified by MVA method, then setting values of differential protection and standby protection were calculated separately. The practical running result showed that the setting method can cut off fault point sensitively, reliably, quickly and choicely.
Design of Boiler Temperature Control System Based on DSP and Current Loop
WANG Li-hua, GAO Jin-yu, WANG Yan-jie
2011, 37(7): 98-101.
<Abstract>(88) <PDF>(4)
Abstract:
A design scheme of boiler temperature control system based on DSP and current loop was proposed, and designs of generator and receiver of the current loop, DSP processing module and control algorithm were introduced in details. The boiler temperature control was realized by using TMS320F2812 DSP as a controller, 4~20 mA current loop as transmission mode, and PID as control algorithm. The system has high flexibility and reliability.
A New Type of Integrated Protector for Mine Illuminatio
GAO Chao-xiang, SHEN Yi
2011, 37(7): 102-104.
<Abstract>(44) <PDF>(3)
Abstract:
A new type of more secure and convenient integrated protector for mine illumination was proposed to solve problems of traditional integrated protector which has incomplete functions and high failure rate, and the circuit and working principle of the protector were introduced in details. The frequent faults and their solutions were given as well.
Design of Mine-used Multi-resolution Display Board
WEI Jun, LIU Dong, MOU Kai
2011, 37(7): 105-107.
<Abstract>(33) <PDF>(4)
Abstract:
A mine-used multi-resolution display board was designed according to principle of human visual engineering and mine users' actual demands. The display board can change font resolution according to field condition so as to meet requirements of most mines.
Application of Information Monitoring System of Safety Production in Qingdong Coal Mine
SHEN Quan, WANG Nian-song
2011, 37(7): 108-110.
<Abstract>(59) <PDF>(3)
Abstract:
The paper introduced functions, characteristics and application in Qingdong Coal Mine of information monitoring system of safety production, and focused on the system construction and analysis of problems found in the construction and their solutions. The application result showed that the system has characteristics of simple and convenient operation, reliable and stable performance, high real-time performance, and little maintenance, and achieves purpose of downsizing for efficiency in coal mine.
Design of Intelligent Monitoring Software for Mine Ventilator
LI Chun, ZHAI Nai-jiang, YU Zhi-chao
2011, 37(7): 111-113.
<Abstract>(68) <PDF>(7)
Abstract:
A design scheme of intelligent monitoring software for mine ventilator was proposed, and the serial communication module, data management module and intelligent diagnosis module were introduced in details. The software realizes functions of monitoring of running status and fault diagnosing for ventilator by using MSComm control to achieve serial communication and BP neural network to establish an intelligent diagnosis model, and provides a practical method with high accuracy and fast diagnosis for operators to master ventilator running status.
Application Skills of Discoverer-based Statement Compositio
YAN Ya
2011, 37(7): 113-116.
<Abstract>(27) <PDF>(2)
Abstract:
The paper introduced fundamental conceptions, connection methods and basic environment of Discoverer, and gave an example to illustrate basic method and technique of creating custom statements with Discoverer.

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