2011 Vol. 37, No. 8

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Cover Catalogue
Methods of Filtering of False Data of Mine-used Sensor
ZHANG Li-bin, JIANG Ze, WANG Qi-feng
2011, 37(8): 1-4.
<Abstract>(36) <PDF>(7)
Abstract:
The paper introduced composition and working principle of mine-used sensor, analyzed form of false data of mine-used sensor and their generation causes. It put forward basic methods of filtering false data from design of anti-interference, design of low power-consumption and signal output way. The practical application showed that the method reduces probability of false data generation of mine-used sensor and improves stability of mine-used sensor and reliability of safety monitoring and control system.
Design of a New Type of Electromagnetic Valve Driver for Hydraulic Support
CHEN Zhuo, HE Jia-jian, WU Qing, XU Biao, RONG Liang, LI Peng, GONG Fu-zhang
2011, 37(8): 4-7.
<Abstract>(46) <PDF>(8)
Abstract:
In view of problems of single function and no information collection function existed in traditional electromagnetic valve driver of hydraulic support electro-hydraulic control system , the paper put forward a design scheme of a new type of electromagnetic valve driver for hydraulic support, and introduced hardware composition, design of internal circuit and software of the driver. The driver has been successfully used in working face of automatic combination cutting-and-conveying unit and automatic coal plough unit, and has stable and reliable in running.
Design of Remote and Intelligent Controller of Mine Tunnelling Ventilator Based on CAN Bus
GUO Hui, ZHAO De-qun, SHI Ning
2011, 37(8): 8-11.
<Abstract>(52) <PDF>(8)
Abstract:
In view of problems that current ventilator of mine tunnelling roadway has low efficiency and low anti-interference ability in remote transmission of harmful gases signals, a remote and intelligent fuzzy controller with multivariable of underground tunnelling ventilator based on CAN bus was designed. The controller can collect concentration signals of harmful gases in underground tunnelling working face, uses multivariate fuzzy control method to control frequency of frequency converter intelligently, so as to adjust air volume of ventilator, reduce concentration of harmful gases and power consumption of ventilator. The controller solves the problems of anti-interference of remote transmission of harmful gases signals in tunnelling roadway.
Application of Vibration Monitoring Analyzer in Fault Diagnosis of Coal Mine Electromechanical Equipments
JIA Hong-gang, LI Zhen, CAO Hong
2011, 37(8): 11-13.
<Abstract>(57) <PDF>(6)
Abstract:
To solve problems of large volume, high power-comsumption, complicated installation at site and off-line diagnosis existed in application of traditional vibration analyzer in coal mine, a novel on-line and mine-used I.S. vibration monitoring analyzer was designed. The working principle and application in coal mine ventilator of the analyzer were introduced. The analyzer uses envelope demodulation technology and quantitative diagnostic identification technology to extract characteristic frequency of fault and make quantization calibration, so as to realize on-line monitoring and fault diagnosis of bearing. The practical application showed that the analyzer can meet with requirements of real-time and accuracy in operation statue and on-line diagnosis of large-scale electromechanical equipments of coal mine, which has a wide promotional value.
Design of Remote Control System of Drill of Gas Extraction in Coal Mine Underground
LUO Ming-hua, SHEN Ming, XUE Yan-bo
2011, 37(8): 14-16.
<Abstract>(60) <PDF>(6)
Abstract:
In order to effectively put an end to accidents of coal and gas outburst, injury by drilling machinery, a remote control system of drill of gas extraction in coal mine underground was designed. The system adopts PLC control technology, video and audio monitoring technologies and remote wireless data transmission technology. Operators uses operating handle and button of ground operation platform to realize remote control drilling of drill and automatic loading and unloading of drilling rod with the help of remote video and audio, so as to achieve unmanned gas extraction in coal mine underground. The test result showed that the system is stable and reliable in running.
Design of a New Type of Remote Control Device for Mining Equipments
CHENG Yu-bin, XIE Yun-song
2011, 37(8): 17-21.
<Abstract>(32) <PDF>(5)
Abstract:
In view of problems of poor reliability, weak generality existed in traditional remote control devices, the paper designed a new type of remote control device of mining equipments, and introduced composition, hardware and software design of the device in details. The device adopts technologies of anti-interference design, communication error-controlling, detection of equipment state to improve reliability and generality. The practical application showed that the device can meet with control demands of large-scale mining equipments in coal mine at present.
Development of GPRS Measurement and Monitoring System of Truck Scale under ERP Environment
WU Yan-min, WANG Jun-jie, DENG Wei, FU Dong-peng
2011, 37(8): 22-26.
<Abstract>(56) <PDF>(5)
Abstract:
In view of rigged problem of using remote control signal existed in current truck scale measurement mode, the paper proposed a design scheme of GPRS measurement and monitoring system of truck scale under ERP environment, and introduced design of hardware, software of the system and its function in details. The system adopts stepwise count and worksheet filtering method to process data, can automatically detect vehicle information without infrared positioning system, and can accurately send measurement data to supervision department of enterprise, so as to make the system break through limitation of use place, suit for field of truck scale which is unsuited to install infrared positioning system; the system uses wireless recognition technology to real-timely judge rigged data, and send these data information and alarm signal to enterprise supervision department through GPRS networks and make alarming. The practical application showed that the system is simple, practical and convenient in operation, which effectively prevents man-made cheating combining with enterprise ERP system, and improves working efficiency.
Design of Digital Filter for Voice Noise Based on LabVIEW
WANG Kai, LV Ying-jun, QI Xue-guang
2011, 37(8): 26-28.
<Abstract>(48) <PDF>(5)
Abstract:
In view of problems of complex code program and poor portability in programming method of traditional digital filter, the paper proposed a design scheme of digital filter for voice noise based on LabVIEW. The filter uses graphical programming language LabVIEW 8.6 to realize functions of voice signal filtering, real-time measurement and storage, alarm, which has characteristics of low development fund, simple development process, convenient extend function and easy operation and usage compared with traditional filter.
Existing State of Mine-used Movable Lifesaving Cabin and Design Scheme of Its Environmental Monitoring System
ZHANG Peng, HU Tao-ying, HU Min, JIA Xiang-zhi, WU Wen-tong
2011, 37(8): 29-32.
<Abstract>(65) <PDF>(3)
Abstract:
The paper introduced development state of mine-used movable lifesaving cabin in China and abroad, analyzed design requirements of environmental monitoring system of mine-used movable lifesaving cabin, and put forward design goal and idea of software design ,hardware design and signal transmission of environmental monitoring system of mine-used movable lifesaving cabin. The paper can provide technology reference for development and use of lifesaving cabin in China.
2011, 37(8): 32-34.
<Abstract>(36) <PDF>(3)
Abstract:
Research of Fault Detection and Intelligent Diagnosis Technology of Heavy-loading Machinery in Copper-scandium Metal Mine
ZHANG Guo-Wei
2011, 37(8): 34-37.
<Abstract>(56) <PDF>(3)
Abstract:
By analyzing fault detection and intelligent diagnosis technologies of key devices of coal mine and combining with equipments condition in copper-scandium metal mine, the paper analyzed application feasibility of coal mine technologies to metal mine, and discussed research methods and strategy, extraction methods of fault signal characteristics and methods of evaluation and quantify diagnosis of equipment state of fault detection and intelligent diagnosis of key devices in copper-scandium mine. The paper has great reference value in promoting technology research of emission reduction and rational source utilization in metal mine.
Research of Automatic Control Method of Swing Speed of Cutting Arm of Roadheader
GAO Feng, WANG Su-yu, GAO Juan, LI Rui, WU Miao
2011, 37(8): 38-41.
<Abstract>(42) <PDF>(6)
Abstract:
Because coal and rock in tunnelling roadway has phenomenon of sharp hardness change, so it's difficult to change swing speed of cutting arm of roadheader timely and effectively by manual control, then it will affect life of cutting head pick and cutting motor seriously. To solve the problem, the paper proposed an automatic control method of swing speed of cutting arm based on PID by analyzing relationship between swing speed v of cutting arm, cutting motor current I and hardness of coal and rock f, namely takes the difference of cutting motor rated current I0 and actual current I as input variable to control current I1 controlling valve port opening of electron-hydraulic proportional valve through linear combination of proportion unit, integration unit and differentiation unit, so as to control swing speed of cutting arm. The paper also proposed 5% control precision standard according to coal industry standard MT/T971-2005. The control method achieves aims of replacing artificial manipulation, protecting cutting head pick and cutting motor and makes cutting motor always work with full-load and constant power. Key words:
Selection and Application of DC-link Capacitor for Mine-used 2-quadrant Frequency Converter
ZHUANG De-yu
2011, 37(8): 41-43.
<Abstract>(90) <PDF>(5)
Abstract:
Based on special characteristics of mine-used 2-quadrant frequency converter and analysis and calculation of ripple current and ripple voltage of DC-link capacitor of frequency converter, a simple and easy selection method of DC-link capacitor was presented from point of current flows of inverter side. The correctness of the method was proved by use of Simulink software. At last, it illustrated film capacitors is superior to electrolytic capacitors as DC-link capacitor of frequency converter.
Design of Mine-used Digital Broadcasting System
YANG Juan
2011, 37(8): 44-47.
<Abstract>(63) <PDF>(4)
Abstract:
To solve shortcomings that coal mine underground broadcasting system has short transmission distance, bad anti-interference ability, need separate wiring and only makes whole network voice broadcasting because it uses analog audio broadcasting way, the paper put forward a design scheme of new kind of mine-used digital broadcasting system. It introduced structure, main function, software and hardware design of the system in details. The system adopts computer technology, network technology and audio stream technology, which will make collected real-time radio signal quantization, coding, compression, cache, and transmit to Internet radio terminals by IP packets and broadcast according to the network transmission agreement. The system solves shortages of traditional analog audio broadcast. The laboratory test and operation results showed that the system is stable and reliable, sound and video playback is fluent, operation is simple, which can meet with mine actual needs.
Monitoring of Surface Subsidence Based on D-InSAR Technology in Huainan Mining Area
YAN Jian-wei, WANG Yun-jia, ZHU Yong
2011, 37(8): 48-51.
<Abstract>(61) <PDF>(5)
Abstract:
In view of defects of long monitoring period, high cost and incomprehensive monitoring existed in monitoring technology of surface subsidence in mining areas by use of geodesic leveling and GPS measurements, a monitoring method of surface subsidence based on D-InSAR technology was proposed. Taking Huainan Coal Mining Area as experimental district, two-pass D-InSAR technology was used to get surface deformation image of Huainan Coal Mining Area in experimental time by use of experimental data of two scenes ALOS PALSAR data. The information of surface subsidence of coal mines of Huainan Coal Mining Area was analyzed. The result showed that the subsidence of mining area is 5~25 cm and corresponds to practice. Therefore, the monitoring method based on D-InSAR technology is an effective method to obtain information of surface subsidence for mining area.
Research of Application of Frequency-conversion Energy-saving System Based on PLC in Freezing Construction of Shaft
GUO Lei
2011, 37(8): 52-55.
<Abstract>(48) <PDF>(4)
Abstract:
In view of problems of large installed capacity, high power consumption and characteristics of stage in freezing construction method, a frequency-conversion energy-saving system based on PLC was designed based on analyzing mechanical properties of screw brine units of freezing system under different working conditions and power consumption in various frozen phases. The system takes PLC as control core, makes information feedback of system condition by use of pressure sensor and liquid level gauge , and uses PID algorithm to control frequency output of frequency converter so as to regulate flow of salt water pump and control amount of cooling. The feasibility and high efficiency of application of the system in shaft construction was proved by experimental data.
Application Research of Acoustic Emission Technology in Crack Monitoring of Column Cylinder
YAO Yu-wei
2011, 37(8): 56-60.
<Abstract>(34) <PDF>(5)
Abstract:
In view of problem of fracture of cylinder in strength test and type test for column cylinder, the paper put forward a scheme of crack monitoring of column cylinder based on acoustic emission technology. The scheme uses acoustic emission technology to capture, analyze, process and display elastic wave of crack produced in compression process of column, uses time difference location method to get position of acoustic emission source, and uses wavelet packet technology to process acoustic emission signal to improve location precision. The test result showed that it is feasible to use acoustic emission technology to produce and development and make risk analysis of crack and weld of column cylinder.
A New Type of Arc Suppression Coil with Full Compensatio
SONG Zhao-zhao, MA Xiao-ping, BU Li
2011, 37(8): 61-64.
<Abstract>(64) <PDF>(3)
Abstract:
To solve problems of low compensation precision of pre-adjusted type arc suppression coil and bigger residual current and slow compensation speed of grounding point of post-set arc suppression coil, the paper gave structure of a new type of arc suppression coil with full compensation combining with advantages of pre-adjusted and post-set arc suppression coil. It established a simulation model of characteristics of controlled reactor and 10 kV power network to ground with the new type of arc suppression coil. The simulation results showed that when 10 kV power network happened single-phase ground fault, the main arc suppression coil can quickly operate, and compensate most of capacitive current; subordinate arc suppression coil can compensate accurately with fine turning after response time. The new type of arc suppression coil can improve both speed and accuracy of compensation.
Application of Quadratic Single Neuron Adaptive Algorithm in Motor Control
LIU Ning-ning, SUN Wei, LOU Ben-yue, DING Li-wei
2011, 37(8): 64-67.
<Abstract>(54) <PDF>(3)
Abstract:
In view of problem that current control method of speed-regulation system of DC motor has poor control effect caused by fixed parameters of PID controller, the paper put forward an adaptive PID control algorithm with quadratic single neuron, namely quadratic performance indexes was introduced in adjustment of weighting coefficients, and expecting optimization effect was gotten by calculating control law. The Matlab simulation result showed that the method can improve dynamic process performance of control system, reduce overshoot, shorten settling time and has some certain anti-interference ability.
Design of Three-phase Unity Power Factor PWM Rectifier
LI Xiao-xi, SONG Jian-cheng, QU Bing-ni, GENG Pu-long, LIU Guo-rui
2011, 37(8): 67-70.
<Abstract>(30) <PDF>(3)
Abstract:
In view of problem of electric harmonic pollution produced by diode rectifier and phase-controlled rectifier, a three-phase unity power factor PWM rectifier was designed. The topology of power circuit, control strategy of PWM rectifier and design methods of hardware circuit and software were introduced in details. The experiment result showed that the PWM rectifier adopts control strategy of direct current of double loop-closed of voltage and current, which has high power factor and low total harmonic distortion in AC-side, and reduces pollution to power network.
Research of Control Method of Grid Voltage Orientation of Grid Side Converter of Doubly-fed Generator
LIANG Shuang-quan, LI La
2011, 37(8): 71-74.
<Abstract>(56) <PDF>(3)
Abstract:
A mathematical model of three-phases voltage PWM converter was established, two implementation methods of grid voltage orientation control of PWM converter were analyzed in details. According to vector relation of grid voltage and line voltage, an implementation method of grid voltage orientation of grid side PWM converter of doubly-fed power excitation system was determined. An experimental platform of three-phase voltage PWM converter was built by taking TMS320F2812 as main control chip, and zero-crossing comparator and software were designed. The experimental result indicated that the control method is correct and valid.
Research of DC Voltage Ripple of Single-phase AFE
YANG Yan, ZHU Rong-wu
2011, 37(8): 75-78.
<Abstract>(38) <PDF>(3)
Abstract:
To take single-phase PWM rectifier as AFE of cascaded H-bridge multi-level frequency converter can satisfy requirement that electric drive system of coal mine hoist must have capacity of bidirectional energy flowing, but there are third harmonic in its AC-side current because of the second ripple of output voltage. To slove the problem, a method of steady-state error feed-forward compensation was put forward, namely frequency-doubled sinusoidal error signal of output DC voltage is compensated to set signal of DC voltage in order to reduce influence of voltage ripple on distorted current of power grid. The results of simulation and hardware experiment showed that the method is effective.
Application of Fuzzy Controller in Monitoring of Roof Air Flashover
LIU En-peng, JIA Cun-liang, LI An-ying, JIN Li
2011, 37(8): 78-81.
<Abstract>(42) <PDF>(3)
Abstract:
The paper used point-plate discharging model to simulate roof air flashover, verified feasibility of using two factors of pulses and power current to monitor occurrence of roof air flashover by analyzing experimental data, and obtained change range of two factors. It designed fuzzy controller to monitor occurrence of flashover taking pulses and power current as input variables and verified the controller by use of collected data of laboratory.The experimental result showed that the controller can observed air discharge state at any time, and using the controller to monitor roof air flashover is feasible.
Application of WiFi Wireless Communication System at Underground Drilling Site
ZHU Sai-hu, DONG Ju-hui
2011, 37(8): 82-84.
<Abstract>(33) <PDF>(4)
Abstract:
The paper introduced characteristics of WiFi wireless communication system and its application at underground gas drilling site of Shihao Coal Mine. The actual application showed that WiFi wireless communication system realizes video monitoring and voice communication function at underground gas drilling site, so as to ground control center can make adjustment in time according to the underground scene.
Development of Intelligent Gas Patrol Management System of Coal Mine
LIANG Peng, HUANG Jin-bo, WANG De-wei
2011, 37(8): 84-87.
<Abstract>(44) <PDF>(3)
Abstract:
To ensure accuracy and timeliness of gas monitoring data and realize safety early warning for gas, an intelligent gas patrol management system was developed. The system uses wireless technology and sensor technology, can real-timely monitor, display and voice prompt information of gas concentration, time, battery voltage and other information, and can upload patrol information to computer which can generate patrol routes or gas prediction curve for personnel of mine safety monitoring and management after the information are analyzed by system software. The industrial experiment result showed that the system can operate in reliable and has low failure rate.
Protection Technology of LonWorks Bus Interface of Mine-used Products
MENG Qing-yong
2011, 37(8): 88-90.
<Abstract>(31) <PDF>(2)
Abstract:
For the problem of frequent damage in application of LonWorks bus interface of mine-used products, main causes were analyzed including unisolating sending and receiving signals, electrical surge and long-distance transmission. Three protection circuits were gave which are composed of gas discharge tube, polymeric positive temperature coefficent, transient voltage suppressor and electro-static discharge protector. The test result showed that the three circuits can achieve corresponding standards about anti-interference testing of electrical surge and have good effect in use.
Design of Safety Control System of Trailer Operation of Electrical Locomotive and Its Applicatio
WEI Qi-dong
2011, 37(8): 90-92.
<Abstract>(32) <PDF>(3)
Abstract:
In order to prevent locomotive deviation accident caused by negligence operation of driver in coal yard of inclined shaft, safety control system of trailer operation of electrical locomotive was designed based on machine image recognition, wireless remote control, PLC control. The composition and control principle of the system were introduced. The practical application showed that the system is sensitive and accurate in identification locomotive, timely and reliable in braking, which effectively put an end to the locomotive deviation accident in coal yard of inclined shaft.
Design of Control System of Rapid and Quantitative Loading System Based on S7-400FH PLC
ZHU Zhen, LI Wei, YAN Ya
2011, 37(8): 93-96.
<Abstract>(33) <PDF>(4)
Abstract:
In order to meet with requirements of rapid and quantitative loading system of sulfur for petrochemical industry, a control system of rapid and quantitative loading system based on S7-400FH failure-safe PLC was designed. The paper introduced hardware and software design and network configuration of the control system in details. The practical application showed that the control system achieves rapid and quantitative loading of sulfur in dust environment, which has functions of centralized control, precise blending and self-protection interlock.
Upgrading Reform of Safety Monitoring Network System of Ningxia Coal Industry Group Co., Ltd.
LIN Hong-mei
2011, 37(8): 97-100.
<Abstract>(60) <PDF>(3)
Abstract:
The paper analyzed current situation of network platform of safety monitoring system of Ningxia Coal Industry Group Co., Ltd., introduced hardware platform, software functions and key technologies in construction process of the network system. On the basis of hardware platform with dual machine redundant and B/S model, three-layer logic structure system was designed, upgrading reform of safety monitoring network system of Ningxia Coal Industry Group Co., Ltd. was completed, which meets with new management standard and requirements.
Design of Integrated Automation System of Small and Medium-sized Coal Mines Based on GEPON Network
MEI Hao
2011, 37(8): 100-103.
<Abstract>(67) <PDF>(3)
Abstract:
To solve problems of safety production and information island of Chinese small and medium-sized coal mines, a kind of integrated automation system based on GEPON network was designed. The system uses GEPON redundance network to integrate each control systems and industrial TV video monitoring systems into network platform of automation system, can be free to access all of existing subsystems of coal mine, and has reserve interface so as to conveniently expand. The practical application showed that the system suits for small and middle-sized coal mines.
Design of Mine Integrated Information System
WANG Fu-ku
2011, 37(8): 104-106.
<Abstract>(56) <PDF>(3)
Abstract:
The paper proposed a design scheme of integrated information system for Jizhong Energy Group Co., Ltd., gave realization goal of information integration, and introduced integration platform technology and design of integration way of the system. Software of the system uses configuration software + custom-made information issue way, hardware of the system uses H3C core switchboard with hot standby + metropolitan area network way to transmit and integrate information. The practical application indicated that the system realizes information integration and sharing of main production process, achieves goal of remote monitoring and unification management analysis of information in production scheduling center.
Integration Technology of Enterprise Information Network and Industrial Control Network
WANG Dong, XU Shi-xu, LIU Shi-kui, LI Yu-la
2011, 37(8): 107-110.
<Abstract>(46) <PDF>(3)
Abstract:
The paper introduced integration technologies of enterprise information network and industrial control network, expounded function of industrial database in integration of enterprise information network and industrial control network. It introduced an integration method which uses industrial history database KingHistorian to realize efficient data exchange between information network and PLC control network. The practical application showed that the integration method is safe, reliable and convenient and has strong practicality.
Design of Smoke Sensor Based on MSP430F2012 Single-chip Microcomputer
ZHAO De-yue
2011, 37(8): 110-102.
<Abstract>(35) <PDF>(3)
Abstract:
In view of problems of large power-consumption and bad reliability existed in current smoke sensor, a smoke sensor based on MSP430F2012 was designed, and design of hardware and software of the sensor was introduced. The practical application showed that the sensor is lower in power-consumption, stable in performance and good at practical applicability.
Design of Signal Acquisition Circuit of NAMUR Speed Sensor
ZHANG Shou-fu, LIU Hong-chao
2011, 37(8): 113-115.
<Abstract>(34) <PDF>(2)
Abstract:
In order to obtain accurate signal of NAMUR speed sensor, the paper designed a kind of signal acquisition circuit based on PIC18F2480 single-chip microcomputer, and gave software design process of the circuit. The signal acquisition circuit can collect frequency signal with 0～600 Hz, and can on-line monitor conditions of break, short circuit or normal running of sensor.
Design of Mine-used Signal Converter Based on HART Transducer
WANG Zhong-min, LIANG Yu-wei
2011, 37(8): 116-118.
<Abstract>(39) <PDF>(2)
Abstract:
The paper introduced hardware and software design of a mine-used signal converter based on HART transducer. The converter takes C8051F040 single-chip microcomputer as central processor, which achieves communication with sensors with HART transducer and can display measured signal of sensor through digital tube, and has functions of range set, alarm value set, frequency output and CAN bus output.
Design of Mine-used LCD Display Platform Based on Embedded System
YUAN Xiao-ming
2011, 37(8): 119-121.
<Abstract>(44) <PDF>(2)
Abstract:
To solve problems of large dimensions, high cost and non-uniform programming interface existed in mine-used display, the paper introduced design of a mine-used LCD display platform based on embedded system. The hardware system of the platform adopts ARM9 and integrates many functions of display, communication and A/D sampling ; software system uses operation system of embedded Windows CE as platform and adopts embedded LabVIEW as user interaction software to edit display interface, and has advantages of convenient extend, efficient and beautiful interface. The platform can also match with electrical control devices through some communication methods to display state, alarm message of tunneling machine. The practical application showed that the platform has faster communication and display speed and good display effect.
Design of Wireless Network Interface of Mine-used Camera Based on AR2524 Chip
LIU Dong, WANG Xiang-ju, YU Jing-jing
2011, 37(8): 122-125.
<Abstract>(26) <PDF>(2)
Abstract:
In view of demand that some mine field is unconvenient for cable laying and need video transmission by wireless, wireless network interface of camera based on AR2524 chip was designed on platform of network camera. The wireless network interface uses IEEE802.11b/g protocol and can access Ethernet by wireless AP. The experiment result showed that the wireless network interface can realize wireless connection with wireless monitoring and control substation and transmit video signals, and has long transmission distance, clear image, smooth video, which meets with basic demands of mine video transmission.
Design of Mine-used Automatic Spray and Watering Controller
YU Fang-yang
2011, 37(8): 125-127.
<Abstract>(34) <PDF>(3)
Abstract:
The paper introduced design of a kind of automatic spray and watering controller. The controller uses main controller to control magnetic valve switch to achieve automatic watering of sprayer. The practical application showed that the controller has high reliability, good atomization effect, which average dust-laying rate is 92.7%.
Design of Integrated Automation Monitoring and Control System of Flue Gas Desulfurization and Its Applicatio
LI Guo-feng
2011, 37(8): 127-129.
<Abstract>(41) <PDF>(7)
Abstract:
In view of status of low desulphurization efficiency and no automatic control of desulfurization process in original flue gas desulfurization system of Thermal Power Plant of Daizhuang Coal Mine, the paper analyzed technical process of ammonia flue gas desulfurization, designed integrated automation monitoring and control system of ammonia flue gas desulfurization based on PLC. The system realizes monitoring and control of entire flue gas desulfurization process, and can complete automatic control of desulfurization process according to monitored data in field, which improves automation level of the thermal power plant.
Design of Mine-used DC UPS
LIU Qiang, YANG Fang-fang
2011, 37(8): 130-133.
<Abstract>(48) <PDF>(7)
Abstract:
A DC UPS used in underground exchanger was designed. The UPS uses MAX713 to make intelligent charging for Ni-Cd battery; it takes MSP430F147 as microprocessor, uses external interruption mode to monitor working state of mine-used AC, and it can switchover to start Ni-Cd battery supply when mine-used AC has fault, so as to ensure continuous work of exchanger. The test result showed that the UPS has certain practicality.
Design of a High-precision Digital Controlled DC Power Supply
HUANG Zhao-lin, WU Wen-tong, JING Xiao-jun, QIAO Feng-jie
2011, 37(8): 134-137.
<Abstract>(45) <PDF>(3)
Abstract:
The paper introduced design of an overall scheme and main circuit of high-precision digital controlled DC power supply. The power supply is based on switch regulator chip LM2596 and digital signal controller dsPIC30F4013, which combines high-efficiency of DC voltage-stabilized power and capabilities of high-precision data acquisition and processing of embedded system, and uses digital potentiomete MAX5478 to achieve adjustment of output voltage. The power supply has functions of output current protection, real-time display of voltage and current, matrix keyboard interactive feature. The test results showed that the power supply has advantages of stable output performance, strong load capacity and has practical value.
On-line Calculation and Analysis Management System of Theory Line Loss of Power Grid Based on Web Issue
ZHENG Wei, ZHOU Xi-chao, ZHI Yong, FENG Xiao-qiang
2011, 37(8): 137-139.
<Abstract>(36) <PDF>(2)
Abstract:
The paper put forward a design scheme of on-line calculation and analysis management system of theory line loss of power grid based on Web issue, introduced architecture and functions implementation of the system. The system uses SCADA system to obtain real-time data of power grid, and adopts data mining and data clustering algorithm to realize autofilter of the real-time data, and uses Web method to issue and summary calculation results of theory line loss of power grid, which can provide a good platform for fully grasping status of line loss of power gird and proposing reduction loss measures.
Implementation of Automatic Control System of Coal Preparation Plant
HAN Chao-hui
2011, 37(8): 140-142.
<Abstract>(52) <PDF>(4)
Abstract:
The paper introduced composition and detailed design of automatic control system of coal preparation plant, described implementation of key functions of the system. The actual application showed that the system realizes automatic control of all links of coal preparation plant, which is safe, reliable and has strong expandability.
Application of Modbus Protocol in Communication between S7-226 PLC and Lenze Frequency Converter
ZHANG Zhi-wei, ZHANG Shi-cong, WANG Ran-feng
2011, 37(8): 142-146.
<Abstract>(58) <PDF>(3)
Abstract:
In view of problem of distortion of signal of long-distance transmission when using conventional switch quantity, analogue control method to control frequency converter, the paper put forward a method which adopted Modbus protocol to communicate between S7-226 PLC and lenze frequency converter, introduced its communication debugging procedures in details. The actual application showed that the method can effectively resolve problem of signal in distortion process of long-distance transmission, and PLC can easily control running state of frequency converter and read running information of frequency converter under communication mode, so as to achieve purpose of monitoring of running status.
Research of Current Situation and Development Tendency of Informatization of Coal Industry
CHEN Yang-cai
2011, 37(8): 147-151.
<Abstract>(41) <PDF>(5)
Abstract:
According to development requirements of informatization of coal industry of China in “The 12th Five-Year Plan” period, the paper introduced current situation and existing problems of informatization of coal industry of China, analyzed development needs of informatization of coal industry of China and proposed suggestions of future development of informatization of coal industry of China.
Research and Practice of Preventing Lightning and Galloping Disasters of Transmission Line of Pingmei Mining Area
YU Li-min, CHENG Zhi-ya
2011, 37(8): 151-154.
<Abstract>(56) <PDF>(3)
Abstract:
In view of problems of lighting and galloping of 35 kV transmission line of Pingmei Mining Area, the paper analyzed basic active regularity of lighting and galloping disasters and gave concrete measures of preventing lighting and galloping. The actual application showed that the measures can reduce accident trip rate of transmission line of mining area effectively.
Research of Mine-used 3.3 kV Static Var Compensator Based on SVG
ZHAO Zeng-yu, MA Gang, ZHU Nai-peng
2011, 37(8): 155-158.
<Abstract>(35) <PDF>(4)
Abstract:
For problems of large voltage fluctuation, low power factor, large line loss, difficult starting of device and so on of power supply system in working face, the paper proposed a technical route of var compensation which takes SVG as a core, and introduced design scheme of mine-used 3.3 kV static var compensator based on SVG. The industrial test result showed that the compensator has performances of quick response speed and smooth and correct compensation, which improves power factor of power device in starting and running process, shortens starting time, improves stability of starting and running voltages, restrains harmonic wave efficiently, and has obvious energy-saving effect.
Research of Gas Monitoring System Based on BP Network and D-S Evidence Theory
FU Hua, KANG Hai-chao, LIANG Ming-guang
2011, 37(8): 159-161.
<Abstract>(39) <PDF>(2)
Abstract:
In view of problems of fuzziness and uncertainty of output signal of gas sensor used in coal mine, the paper proposed a design scheme of gas monitoring system based on BP network and D-S evidence theory. The system uses improved BP algorithm to get basic probability assignment of underground environment and uses D-S evidence theory to fusion information of output of BP network, so as to make judgment and decision of underground gas state. The experiment result showed that the system improves accuracy of monitored gas information and rapidity of decision.
Design of Communication Manager of Substation Based on IEC61850 Standard
LAN Xi-zhu, XU Yang
2011, 37(8): 162-164.
<Abstract>(34) <PDF>(3)
Abstract:
In order to access IED which do not support IEC61850 standard into integrated automation system of substation with IEC61850 communication system, the paper introduced overall design schemes of software and hardware of a communication manager of substation based on analysis of function requirements and application mode in communication system of substation of the communication manager. The communication manager is designed by use of Atom 230 microprocessor and Linux embedded operation system, which has multi network ports and multi serial ports for accessing all kinds of IEDs, and has function of converting traditional communication protocols into IEC61850 protocol.
Development of Function Test System of Electrical Control Box for Mining Equipment
TIAN Yua
2011, 37(8): 165-167.
<Abstract>(39) <PDF>(3)
Abstract:
For existing status of multi functions and complex structure of electrical control system of mining equipment, a function test system of electrical control box was developed. The system tests output response of electrical control box through simulating control commands and working status signals, and has testing functions of action control, fault diagnosis performance, protection performance, action performance and so on. Moreover, compared with handheld testing equipments, the system can realize monitoring function of multi-signal composition input and output signal, and simulate more control results caused by incorrect operation in application . The test result showed validity of the system.
Research of Predictive Condition Maintenance System of Compressor and Its Applicatio
HAN Shi-liang, QI Zhen-yua
2011, 37(8): 168-170.
<Abstract>(51) <PDF>(3)
Abstract:
Taking mechanical compressor of coal chemical industry as example, the paper proposed a design scheme of predictive condition maintenance system of compressor. The system uses comprehensive statistic analysis software in database server to evaluate main parameters of important components of compressor, so as to propose optimal operation and maintenance services of compressor. The actual application showed that the system improves maintenance efficiency and prolongs usage life of compressor.
Brief Analysis of Management and Control and Implementation of Informatization Construction of Coal Enterprise
ZHANG Chang-song, WANG Yu, CHEN Hao
2011, 37(8): 170-172.
<Abstract>(37) <PDF>(3)
Abstract:
The paper analyzed current status of informatization of coal enterprises, and expounded keys and implementation strategies of imformatization construction of coal enterprises by taking practice of Zhongping Energy Chemical Group Co., Ltd. as an example, namely constructing enterprise information highway, data storage and usage center, application system groups of safety production management control, operation management and cooperative working, and high integrated ERP platform. The application showed that informatization construction of coal enterprise is good for improvement of management level, working efficiency and economical benefit of coal enterprise.
Management Information System of Large Scale Coal Construction Engineering Group
CHU Yi, ZHANG Jing
2011, 37(8): 173-175.
<Abstract>(34) <PDF>(3)
Abstract:
The paper introduced whole design scheme, platform structure of network and software, and function modules of subsystems of management information system of Zhongping Energy Chemical Construction Engineering Group. The system adopts network structure of intelligent client and technology of universal joint interface platform, realizes all special functions of construction engineering filed and information interaction of all subsystems, and makes institutions works in coordination with each other.
Application of Real-time Monitoring and Control System of Underground Power Supply in a Coal Mine
LIU Jian-fu, LUO Rui-song
2011, 37(8): 175-178.
<Abstract>(34) <PDF>(5)
Abstract:
In view of problems existed in underground high-voltage power system of No.4 Coal Mine of Zhongping Energy Chemical Group Co., Ltd., the paper introduced a reform scheme of real-time monitoring and control system of underground power supply based on industrial Ethernet + field bus. It introduced general design and network structure of the system and gave characteristics and application effect of the system. The actual application showed that the system can ensure real-time, reliability and safety of data transmission.
Research of Scheme of Preventing Override Trip by Use of Power Monitoring System
CAO Liu-zhu, QU De-cheng, LI Min-zhong, WANG Hui
2011, 37(8): 179-182.
<Abstract>(59) <PDF>(5)
Abstract:
In view of problem that scheme of single preventing override trip and scheme of preventing override trip of surface power system cannot solve underground override trip fault effectively, the paper proposed a scheme that using power monitoring system to solve underground override trip fault. Taking power network of Henan Pingbao Coal Industry Company as example, it introduced realizing principle and implementing situation in details. The actual application showed that the scheme can realize cooperation of upper and lower switches and prevent override trip fault effectively.
Application of Power Balance Technology in Multi-motor Driving System of Coal Mine
SHI Zheng-yun, SHI Er-ting, HUANG Bo, SUN Yan-hui, WANG Zhi-jie, CHEN Hua, LI Kui, YU Xin-kuang
2011, 37(8): 183-184.
<Abstract>(44) <PDF>(4)
Abstract:
The paper introduced working principle of power balance technology in multi-motor driving system of coal mine and gave application of the technology in belt conveying system of a coal mine. The application showed that using power balance technology in belt conveying system can make currents of master motor and slave motor change with loads synchronously, so as to reduce ratio of fault shutdown caused by power unbalance of frequency converter.

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