工矿自动化

Monitoring and Control System for Coal Mine Safety Based on Zigbee Technology

LIU Yuan, ZHU Hua

2007, 33(4): 1-3.

<Abstract>(59)

Abstract:
The paper put forward a scheme of monitoring and control system for coal mine safety established by combining a new wireless communication technology in short distance of Zigbee with existing monitoring equipments based on wire transmission so as to realize real-time monitoring and control of dynamic and all of the underground, summarized Zigbee technology and introduced the design of structure and node of Zigbee network in details, and pointed out that the monitoring and control system for coal mine safety based on Zigbee technology has characteristics of really realizing real-time monitoring of dynamic and all of the underground, low in power consumption and cost.

Analysis of Transmission Characteristics of Electromagnetic Wave in Rectanglar and Curved Tunnel

SUN Ji-ping~, ZHANG Hong-wei~, ZHANG Long~

2007, 33(4): 4-6.

<Abstract>(29)

Abstract:
From the field components of polarization mode along the horizontal direction in(rectanglar) and curved tunnel,the formula of attenuation rate of transmission of(electromagnetic) wave was deduced under the condition of boundary,thereby the relation curve between attenuation rate of transmission of(electromagnetic) wave and bend radius and the changed curve between attenuation rate of transmission of(electromagnetic) wave and frequency were gotten.The results indicated that the attenuation rate of trans-(mission) of electromagnetic wave would greatly increased if curve exists.Under the condition of bend radius constant,the attenuation rate would increase along with frequency if frequency exceeds over a certain(value.) And its changing range relates with bend radius,the smaller the radius is,the quicker the atten-(uation) rate increases.If curvature radius is small,the higher the frequency is,the larger the attenuation rate is.But when curvature radius is large than a certain value,then the higher the frequency is,the smaller attenuation rate is.

Research of Integrated Technology of Isomerous Data of Integrated Monitoring and control System for Coal Mine Safety

JI Wen-li, GONG Shang-fu, CUI Hai-we

2007, 33(4): 6-9.

<Abstract>(39)

Abstract:

Research and Development of Remote Monitoring and Management System of Major Dangerous Sources

SUN Fei, ZHANG Sheng-wen, FANG Xi-feng(

2007, 33(4): 10-13.

<Abstract>(29)

Abstract:
Based on the practical needs of remote monitoring and management of major dangerous sources,the whole framework and structrues of software and hardware of remote monitoring and management system of major dangerous sources were researched.Based on the technology of remote monitoring and theory of fuzzy mathematics, the prototype system of remote monitoring and(management) of major dangerous sources was developed.The example proved the possibility of this research.

Research of Wave Characteristics of Rock AE Based on Wavelet Transform

HE Jian-ping~, WANG Ning~

2007, 33(4): 14-17.

<Abstract>(76)

Abstract:
The relationship between stress and AE rate and wave characteristics of AE in laboratory were analyzed in the paper.Based on wavelet transform,the rock AE wave in laboratory was decomposed into high and low frequency signal,then the original AE wave,detailed signal and approximate signal were(analyzed) and compared,and the result showed that wave characteristics of rock AE in different period were not same in the course of rock distortion,damnification and fracture.So it can build AE wave characteristics storehouse which was used to forecast development trend and regularity in the course of rock distortion,damnification and fracture.The error between the original signal and the reconstructed signal of wave(coefficient) containing signal elements was less than 10~-10, which indicated that the wavelet(analysis) can improve accuracy and reliability of forecasting wave characteristics of rock AE.

Research of the Feasibility of Applying Ionic Smoke Inductor in Coal Mine

CHEN Zhi-gang, WANG Tian-fu

2007, 33(4): 17-19.

<Abstract>(42)

Abstract:
Despite the great differences of geological structure of coal-bed,mining manner and working condition in coal mine in various areas of our country,the air in coal mine has a lot of coal dust,involve PM10 particles that can exist long time in air and its diameter less than 10 μm.These particles will affect resistance value of ionization chamber as same as particles of fire fog.The paper calculated the "base fog value" of ionic smoke inductor aroused by PM10,and the conclusion from the calculation was elicited that the ionic smoke inductor can be used in coal mine to forecast fire.And a mine-used ionic smoke inductor was successfully developed with MC145018.

Research of Data Mining-oriented Data Warehouse of Materials Supply in Coal Mine

FAN Ji, WANG De-yong

2007, 33(4): 20-22.

<Abstract>(36)

Abstract:
Through analysis of the present situation of material supply management of coal industry,the paper indicated that it was important to lead data mining technology for scientific management into the work of material supply management aiming at the existing problems of material supply department, such as bigger stocks, more engrossed capital, low availability and velocity of carital, great work load of material’s import and export and easily to make wrong, low economic benefit etc. And introduced the building technology of data warehouse of materials supply of coal enterprise and its applied data mining technology.

Design of Temporal Data Warehouse and Its Implementatio

BAO Rong~(, 2), SHAO Xiao-gen~

2007, 33(4): 22-24.

<Abstract>(46)

Abstract:
The change of multidimensional mode of data warehouse will influence correctness of the OLAP query result,so it is necessary to maintain the historic change of multidimensional mode.The paper proposed a formal definition of multidimensional model of temporal data warehouse and then designed and implementated a data warehouse with temporal characteristics for coal industry based on this definition.

An Online Detecting Technique for Fiber Based on Bend Loss and Its Implementatio

XING Xue-ning, GU Ya-peng

2007, 33(4): 25-27.

<Abstract>(28)

Abstract:
In this paper an online detecting technique for fiber based on fiber bend loss was introduced. The technique can detect fiber without interrupting the communication, which has greatly reduced the impact on fiber communication system, and has important meaning to it.

Research of the Problem of Spectrum Leakage in Harmonics Measurement of Power System

YIN Qing-ping~, NIU Xiao-ping~

2007, 33(4): 28-30.

<Abstract>(28)

Abstract:
Aiming at the existing problem in harmonics measurement of power system,the paper presented a collecting method based on frequency multiplication phase-locked. Using phase-locked loop to track power wave,this method not only resolved the impact of spectrum leakage on precision of harmonics(measurement),but also realized quick,accurate and real-time measurement.

Research of Self-adaptive Current Protection of Middle-low Voltage Distribution Networks

QIAO Zhan-jun, HU XING-zhi, ZHAO Jian-zhong

2007, 33(4): 30-32.

<Abstract>(34)

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A Reactive Power Optimization Planning of Power System Based on Genetic Algorithm

MA Yan-nan, CHENG Qian-li

2007, 33(4): 33-35.

<Abstract>(38)

Abstract:
The genetic algorithm is an optimization method based on the concept of natural selection.Aiming at the long-term problem of reactive power optimization planning in power system,an algorithm of reactive power optimization planning based on genetic algorithm was presented,which remedied the defects such as no considering the demands of reactive power compensation under system’s minimum load mode and fault condition as well as the different demands of reactive power compensation because of load change at different years.The result showed that the algorithm is reasonable and effective.

Design of Monitoring and Control System for Vehicle of Coal Mine Based on WinCC and CAN Bus

TAN Si-yun, TIAN Geng, YOU Wei-ju

2007, 33(4): 35-37.

<Abstract>(40)

Abstract:
Aiming at the actual situation of control for vehicle of coal mine,the paper presented a(design) scheme of monitoring and control system for vehicle of coal mine,and specific implementing method of(dynamic) playback of monitoring and control for vehicle.

Design of Monitoring and Control System of Hoisting System of Permanent Magnet Linear Synchronous Motor and Its Implementatio

LIU Hui, FU Zi-yi

2007, 33(4): 38-40.

<Abstract>(36)

Abstract:
The paper introduced the working principle of sectional mode hoisting system of permanent magnet linear synchronous motor.Aiming at the features of this system,it designed a monitoring and(control) system,which adopted industry PC as upper-end computer and PLC as lower-end computer,and used configuration software to develop monitoring and control software of hoisting system.The experiment showed that this scheme is reasonable in design,flexible in running,good in reliability.

Development of New Model Intelligent Safety Monitor of Emulsion Pump Statio

WU Zhi-gang, LIU Yin-suo

2007, 33(4): 40-42.

<Abstract>(33)

Abstract:

2007, 33(4): 43-46.

<Abstract>(13)

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Design of Digital Monitoring and Alarming System for Gas

LIAO Gao-hua, PENG Cong, MA Hong-wei

2007, 33(4): 46-48.

<Abstract>(55)

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Implementation of Memory Function of Monitoring and Control System of Mine Hoist

PEI Jiu-fang, CHEN Yu

2007, 33(4): 49-50.

<Abstract>(59)

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Remote Monitoring System of Pressure of Hydraulic Support Based on Configuration Software

LU Jia, ZHANG Shu-qi

2007, 33(4): 51-52.

<Abstract>(45)

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Research of an Improved Multilevel Inverter of Hybrid Cascade

ZHU Mei-qiang, LI Ming, XU Yi-ping

2007, 33(4): 53-56.

<Abstract>(37)

Abstract:
Based on practical withstand voltage value of power switch,a scheme of multilevel inverter for middle-high voltage application was designed by adding lowvoltage hybrid cascade and using optimized PWM algorithm.The improved multilevel inverter of hybrid cascade can prevent reverse current and has good output wave.

Design of Remote Wireless Video Monitoring System for Power System

ZHAO Gui-zhong, WANG Ke-ying

2007, 33(4): 56-58.

<Abstract>(24)

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Development of Mine Feeding Switch with Protection Function of Instantaneous Voltage-loss

ZHANG Chang-yong, LI Zhi-gang, FEI Jiang-hai

2007, 33(4): 59-61.

<Abstract>(36)

Abstract:

Wireless Meter of Unbalanced Traction Current Based on DSP

HE Hong-jiang, HE Ming-xing, WANG Wei, CHANG Ming

2007, 33(4): 61-63.

<Abstract>(40)

Abstract:

Wireless Measuring System of Liquid-level Based on W77E58

HE Gui-fang

2007, 33(4): 64-66.

<Abstract>(47)

Abstract:

Design of Test and Control Terminal of Power Supply System Based on ATmega16 Single-chip Microcomputer

LI Yong, LI Fu-ling

2007, 33(4): 66-68.

<Abstract>(39)

Abstract:

Digital Signal Generator Based on FPGA and Its Application in QPSK Modulatio

SHENG Xiang-zuo, XU Zhao, LUO Wen-chao

2007, 33(4): 69-72.

<Abstract>(60)

Abstract:
Using the carrier to carry digital information in modern communication is a widespread application, such as PSK and QAM technologies,both of them need the carrier with sin wave. The traditional way to generate carrier uses analog circuit,which is hard to integrate and in bad efficacy. The paper discussed how to use FPGA and DDS to get digital signal generator, which had advantages of small volume and strong functions.The practical application of this digital signal generator in QPSK modulation validated the rationality of this scheme.

Design of Wireless Temperature Sensor with Low-power Consumption and Its Implementatio

LIU Guo-wei

2007, 33(4): 72-74.

<Abstract>(37)

Abstract:

Design of Remote Monitoring and Control System of Digitalization and Integration of Coal Mine and Its Implementatio

HE Yao-yi~, YANG Xiao-hua~, JI Xiao-yan~1

2007, 33(4): 75-77.

<Abstract>(39)

Abstract:
Through building of monitoring network system of safety information of coal mine of supervision bureau of coal mine safety and production of Gansu province, the paper introduced network structure,transmission mode of information of remote monitoring and control system of digitalization and integration of coal mine,and the design of system’s software and the key technolgies applied in the system.

Monitoring System for Mine Moving Object Based on CAN Bus and RF Technology

LI Feng-fei, CHEN Qi, CHEN Zong-heng, JIANG Xiang-ju

2007, 33(4): 77-79.

<Abstract>(31)

Abstract:

Research of Model of Information Fusion of Monitoring and Control System of Coal Mine

ZHANG Xiao-qiang, GAO Li, YU Hong-zhe

2007, 33(4): 80-82.

<Abstract>(35)

Abstract:

Communication between S7-200 PLC and Intelligent Remote Receiver Used in Coal Mine Based on Modbus Protocol

JIN Jiang, HOU Lin, HU Shou-xin, GAO Xu-bi

2007, 33(4): 83-86.

<Abstract>(57)

Abstract:
The characteristics of Modbus protocol were introduced, and the protocol libraries of Mod- bus RTU master were analyzed.It made sure that Modbus RTU protocol was adopted in data transmission between S7-200 PLC and intelligent remote receiver used in coal mine, and realized intercommunication between equipment for excavation and remote device. The application indicated that Modbus communication took S7-200 PLC as master has reliability in data transmission and good effect.

Design of Monitoring Device for Brake Shoe-clearance Based on S7-300 PLC

LEI Ru-hai~, WANG Jun~, ZHAO Zhen-ming~

2007, 33(4): 86-88.

<Abstract>(49)

Abstract:
The paper introduced the design of hardware and software of a kind of on-line monitoring device) for disk brake shoe-clearance of hoister and its working principle. The device took S7-300 PLC as main monitoring machine and used correlative sensors to check the parameters of brake shoe-clearance and oil pressures, and realized the functions of real-time monitoring, alarming and cutting off.

Computer Control System of Process for Grinding-classificatio

YU Zhong-an~, WANG Bo-jian~

2007, 33(4): 89-91.

<Abstract>(42)

Abstract:
The working procedure of grinding-classification is a key link in production of mineral concentration. The paper briefly introduced technics of grinding-classification, designed the computer control system of process for grinding-classification, realized automatic control of concentration and flux of grinding-classification, and gave the design of hardware and software of the control system.

Research of Using Web Service as Plug-in Unit of Application Program and Its Applicatio

LIU Tong-hua, ZHANG Jian-ying, MIN Qian-yong, CHEN Guang-pu

2007, 33(4): 92-94.

<Abstract>(38)

Abstract:

Application of PLC and GOT in Transmission Belt

WANG Fu-zhong, WANG Man-li

2007, 33(4): 94-96.

<Abstract>(43)

Abstract:

Reform of Cooling System of Hydraulic Pressure Station at Up-and-down Mine Mouth of Auxiliary Shaft

ZHANG Deng-ling, LIU Juan, MENG Ling-zhi, BIAN Ju