2004 Vol. 30, No. 3

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Cover Catalogue
Development of Continuous Monitoring Software of Electromagnetic Radiation of Coal or Rock
WEI Jian-ping~(, 2), WANG En-yuan~, HE Xue-qiu~
2004, 30(3): 1-3.
<Abstract>(47)
Abstract:
Coal or rock dynamical disasters can be forecasted by monitoring technology for electromagnetic radiation (EMR) in the deformation and fracture process of coal or rock. In this paper, the EMR (continuous) monitoring software based on Windows was developed using (VC++) 6.0. The communication between processes and threads, and real-time collection, display and analysis of multi-signal were realized using DDE and multithread technology. An advanced technology for coal or rock dynamical disasters forecasting was afforded.
Design of Leakage Protection of 3.3 kV Movable Substation in Mine Underground
ZHANG Ji-hong~, LIANG Suo-feng~, CHI Ai-wen~, ZHAO Jian-min~, SONG Jian-cheng~
2004, 30(3): 4-7.
<Abstract>(27)
Abstract:
The working principle and determining method of action resistance value of leakage protection of 3.3 kV movable substation were introduced in this paper. The system’s hardware circuit of 3.3 kV leakage protection was given and the simulation test was carried out under artificial condition. The simulation test showed that the technical scheme is feasible, parameters are reasonable and the tripping is reliable and sensitive.
Study on Nonlinear PID Control for Three-level Rectifier
ZHAO Shao-gang, GAO Sheng
2004, 30(3): 7-9.
<Abstract>(45)
Abstract:
For three-level rectifier, this paper investigated the performance of the unit power factor rectifier controlled by nonlinear PID controller. Simulation results showed that the nonlinear PID controller has some advantages such as short adjustment time, small overshoot and can improve the performance of rectifier.
Detection Principle of the Fifth Harmonic and Its Application in Single-phase Grounding Protection System of High-voltage Power Networks of Mine
MENG Run-quan~, MI Jian-jun~
2004, 30(3): 10-13.
<Abstract>(28)
Abstract:
The installed selective grounding protection equipment for underground high-voltage networks could not work properly owing to the application of the arc-suppression coil, by which the grounding current is compensated. On the basis of analyzing the ground faults, this paper expounded the protection principle based on the fifth harmonic detection, which is suitable for all kinds of underground high-voltage distribution networks. As the application example, a kind of selective single-phase grounding protection system for underground high-voltage distribution networks was introduced, and the result of the experiment was shown.
Application of Neutral Network and Soft-measurement Technology in Performance Testing of Ventilator
DAI Wen, LIN Qing, WU Qing-shou
2004, 30(3): 14-16.
<Abstract>(52)
Abstract:
This paper mainly discussed a way to build the performance model of ventilaor by combination of neutral network and soft-measurement technology. The training experiment of testing data showed that it is an effective way to analyse the performance of ventilator.
Ventilation Control in Mine Based on H_∞ Optimization Control
QU Bai-da
2004, 30(3): 17-19.
<Abstract>(39)
Abstract:
A scheme of ventilation control in mine based on H_∞ optimization control technique was (presented.) A dynamic model with main air flow as current state and ouput power of main fan as control input for the system was built. And in the model, the environment interference and the detection lagging for gas in practices were taken in account. For the model, an H_∞ control strategy with output feedback from gas observers and consideration of control cost were given. The simulation result showed that it is one of the best strategies in the same field under the requirement of the optimization in both technology and economy.
Evaluation of Peformance and Reliability Based on Stochastic Petri Nets
QING Yi-lin~, LIU Kun~
2004, 30(3): 20-22.
<Abstract>(38)
Abstract:
In recent years, stochastic Petri nets have been widely used in the evaluation of performance and reliability of technical systems, such as flexible manufacturing systems, computer and communication systems. In this paper, evaluation of performance and reliability was introduced at first. General stochastic Petri nets were reviewed, together with the state space explosion problem. Finally non-Markovian stochastic Petri nets were discussed.
WEB Issuing of Multimedia Mining Monitoring and Control System
JIA Zong-pu~(, 2), AN Wei-peng~
2004, 30(3): 23-25.
<Abstract>(47)
Abstract:
Multimedia mining safety monitoring and control system is a net system of detecting mining environment and controlling produce equipment. By WEB issuing data on Internet, to provide new management means for coal enterprise administrator. Based on Frontpage 2000, use aidding ASP code to search Acess 2000 dataBase, COOKIES to send information of different pages, finishing ACP to locate control on system graphics simulated pages exactly. And method how to use Microsoft OWC control to draw vary curved lines was given.
Design of Digital Detector of Sound Emissio
XIONG Qing-guo, HE Feng-yu
2004, 30(3): 25-27.
<Abstract>(41)
Abstract:
A new type digital detector of sound emission was introduced in this paper. The detector adopted A/D switch chip, DSP chip and FPGA technology, which is different from analog detector. Implementation methods of hardware and software were given and applicable situation was introduced.
Application of D4J-88 Dispatching and Monitoring System of Railway Transport in Strip Mine
ZHANG Guo-ju
2004, 30(3): 27-28.
<Abstract>(46)
Abstract:
Technical Reform of GKW Series Bulk Oil High-voltage Switch Cabinet Used in Mine
CHEN Guo-qiang, TIAN Qiu-xiang
2004, 30(3): 29-30.
<Abstract>(27)
Abstract:
2004, 30(3): 31-34.
<Abstract>(36)
Abstract:
Data Collection of Reactive Power Compensation System Based on CAN Fieldbus
ZHANG Hai-gang, XIAO Pei, CHENG Sen-cheng, LI Gang-ya
2004, 30(3): 34-36.
<Abstract>(40)
Abstract:
For the constructed reactive power dynamic compensation system based on CAN fieldbus,data co-(llection) subsystem of reactive power dynamic compensation was designed based on 80C916 SCM and SJA1000 CAN controller. The system can collect and calculate the data of three-phase voltage and current by sensors,and transfer all the data by CAN fieldbus.
Fuzzy Control System of Water Level in Industry Boiler Based on CAN Fieldbus
LUO Jia, PAN Xiao
2004, 30(3): 36-38.
<Abstract>(23)
Abstract:
Low price and high quality of industry boiler is one of the taskes of technician. This paper pre-sented a fuzzy control system of water level based on CAN fieldbus and PLC. The system is suitable for middle and small industry boilers. It also can improve security and economy of boiler.
Implementation of Converter Control in DeviceNet Network
SUI Tao~, LIU Xiu-zhi~, LI Hong-tao~
2004, 30(3): 39-41.
<Abstract>(27)
Abstract:
This paper introduced the characteristics of the DeviceNet and the structure of hardware and software for the converter linked to the DeviceNet network in briefly, and described the method of real time monitoring for converter under DeviceNet.
Control System of Production Process for Cement Based on PLC
ZHANG Ming-guang
2004, 30(3): 42-44.
<Abstract>(46)
Abstract:
In accordance with the requirement of production technics of cement,the DCS control system based on PLC was introduced.The designs of software and hardware,communication network,control loops and main functions of control system were expounded.Making PLC and DCS as the core technology and combining industrial control network and configuration software,the system implements concentrative management of whole plant and distributed control of each control station.
Design of a New Digital Intelligent Trigger Module of Thyristor
TAN Guo-jun, XU Zhi-ou
2004, 30(3): 45-47.
<Abstract>(20)
Abstract:
Research about Data Collection and Digital Filter
HE Hong-jiang, WANG Bai-sheng
2004, 30(3): 48-49.
<Abstract>(16)
Abstract:
Long-distance and Real-time Communication Based on MCS51 Single-chip Microcomputer
GONG Bing-jiang, ZHANG Peng, WANG Zhen-xue
2004, 30(3): 49-51.
<Abstract>(40)
Abstract:

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