工矿自动化

Development of Automatic Blending Control System

ZHOU Jian-hong

2003, 29(6)

<Abstract>(40)

Abstract:
The paper introduced an automatic blending control system adopted OMRONC PLC as master, which realizing blending control through frequency control. This system has advantages such as high precision, good feasibility, strong anti interference, etc., which has extend value.

Automatic Identifying Algorithm of Fractures by Computer Based on Minimum Moment Theory

XUE Guo-xin, XIAO Li-chuan

2003, 29(6): 1-3.

<Abstract>(31)

Abstract:
Considering about the distribution of underground fractures, the image logging information should be made the best because well drilling is very expensive. If the fracture plane is vertical to the reference plane, the project of the common line of the fracture plane and the well wall on the paper plane would be a line segment and the fracture plane position could be determined through line fitting. In the reference paper1, an algorithm was proposed, which alternately calculated the angle of the fracture plane to the reference plane and the fitted line. Yet how to get rid of the noise points near to the fracture plane is still a subject to be studied. To this end, it proposed a minimum moment theory determining the angle of the fracture plane to the reference paper plane. Further it took the advantages of line fitting and differentiates noise points from real sample points. Also it found out the difference between the direction of the linking line of two local sample points and that of the fitted line. If this difference is greater than a given small positive number, one of the end point of the linking line would be removed. Repeat this process several times to get rid of the noise points. Afterwards fit out a line with the remained sample points. Compared with previous methods, it could identify the noise points near to the fracture better.

Development of SVPWM Frequency Converter Based on DSP

HUANG You-rui, LING Liu-yi

2003, 29(6): 4-6.

<Abstract>(31)

Abstract:
The paper presented a full digital frequency converter based on a control algorithm of space vector pulse width modulation (SVPWM). The theory of SVPWM was discussed in brief. The frequency converter consists of main circuit and control circuit. The output of SVPWM wave was realized by the digital signal processor TMS320LF2407. The main circuit took the intelligent power module PM100CSA120 as power devices. The results of experiment on a 1.5 kW AC motor were satisfied.

Study on Intelligent and Integrated Protection Technology for Small Flameproof Vacuum Magnetic Starter Used in Mine

LIU Chun-sheng, XU Shi-jing, PENG Hong-xing

2003, 29(6): 7-10.

<Abstract>(27)

Abstract:
The protection system of small intelligent flameproof vacuum magnetic starter used in mine which is composed of 80C196KC single chip microcomputer of MCS 96 series was introduced, in which short circuit protection, open phase protection, overload protection were realized by software. Particularly, the function of fault locking settled the problem which causes electric spark after power on because of short circuit, open phase, leak electricity before power on, thus avoiding causing coal dust or gas explosion accidents. The system was proved through the lab simulating test that all its indexes satisfled the demands of design and achieved good results.

Fuzzy Control of Time of Pressing and Filtering for Float Coal

NI Jian-jun, LI Ming

2003, 29(6): 10-12.

<Abstract>(66)

Abstract:
The time of pressing and filtering affects the moisture of the filtering cake directly. The paper used the fuzzy control technology to realize the control of the time and introduced the design method of the fuzzy controller. The simulation results showed that the effect of the controller is good.

Application of Image Procesing and Identifying Technology in Magnetic Particle Nondestructive Detecting System

ZHOU Jun, PENG Pei-xin, FAN Yong-fa

2003, 29(6): 12-14.

<Abstract>(32)

Abstract:

Main Parameters Design and Simulation Research of Shunt Hybrid Active Power Filter

LI Han-shan , REN Yong-feng , ZHENG Hong

2003, 29(6): 15-17.

<Abstract>(17)

Abstract:
Shunt Hybrid Active Power Filter(SHAPF) can compensate the harmonics generated by the harmonics source of current source type well. The AC side’s inductance and the DC side’s capacitance of the SHAPF play a very important role for compensation effect of system. Based on the theory analysis, the paper argued the model of SHAPF and simulation by using the power system toolbox of MatLab. The simulation experimental results showed that the harmonics and reactive current of the power system could be compensated well by SHAPF.

Study on the Configuration of the Hydrogenation Station System about Hydrogen Fuel Used in Vehicles

PAN Ai-hua, MA Jian-xin, GAO Feng, MAI Yun-fei

2003, 29(6): 17-19.

<Abstract>(22)

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The Method of Improving Power of Inductance Circuit of Intrinsic Safety

SHANG Li-qun , JIA Wen-sheng , SHI Wei

2003, 29(6): 20-21.

<Abstract>(21)

Abstract:
Some methods of improving power of inductance circuit of intrinsic safety were introduced, such as connected inductance circuit, resistance, capacitance and diode with inductance in parallel and improving the frequency of power supply. These methods enlarge the application area of intrinsic safety circuit.

Error Analysis of Short-circuit Current Value by Table Look-up Method

HE Zong-ming

2003, 29(6): 22-23.

<Abstract>(46)

Abstract:

Design of a New Remote Monitoring System of Mine Substatio

ZHANG Xiao-ming

2003, 29(6): 24-26.

<Abstract>(40)

Abstract:
This paper developed a new remote monitoring system of mine substation for the characteristics of mine substations and the requirements of the remote monitoring system that users had proposed. The architecture of this system, the primary functions, the main soft hardware design principle of the digital integrated protector were introduced emphatically. Finally, the main trial results were given.

Intelligent Measuring Instrument of Glide Quantity of Electric Hoist

XU Zhi-qiang, GUO Shun-jing, YAN You-yun

2003, 29(6): 29-31.

<Abstract>(29)

Abstract:
On the basis of summarying and analyzing current measuring methods of glide quantity of electric hoist, the paper put forward an intelligent measuring system using single chip microcomputer AT89C52. This system improved measuring accuracy and labour efficiency strikingly, also reduced labour quantity. The running showed that the system worked well and had good reliability.

Study on Intelligent Control System for Temperature with Induction Heating

FU Hua , WANG Yao

2003, 29(6): 32-34.

<Abstract>(26)

Abstract:
The paper introduced structure of temperature control system of midfrequency induction heating based on CAN bus, and its hardware’s circuit principle and software’s designing method. It put forward a new temperature control method which suited to non linear and inertia system. This method provided effect method for realizing optimal temperature control of technique procedure of midfrequency heating precess.

Measuring Technology of Digital and High-power Electric Energy of Three-phase

XU Qing-you, CHEN Jie-ping

2003, 29(6): 34-36.

<Abstract>(23)

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Application of Integrated Automation Technology for Transformer Substation in Mine

LIU Jie, BAI Hong-feng

2003, 29(6): 36-38.

<Abstract>(25)

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Application of Vertical Blanking Interval Transmissioon Technology

LU Yi

2003, 29(6): 39-41.

<Abstract>(50)

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Application of Fuzzy Controller Composed by PLC in the Automatic Control System of Photoelectric Error-correcting

JIANG Yan-lei, SHI Zeng-fang

2003, 29(6): 41-42.

<Abstract>(22)

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Application of Computer Monitoring System Based on Tube of Flux in Forecasting and Prediction of Self-ignite Point in Coal Bed

XI Jian-cai

2003, 29(6): 43-45.

<Abstract>(36)

Abstract:
At present, using modern equipment to forecast and predict is probing direction of self ignite point forecasting and predication in mine. From 1997, Hegang mining bureau put into computer monitoring system based on tube of flux at Junde coal mine, Nanshan coal mine, Xingshan coal mine, Dalu coal mine, Xing’an coal mine in seccession, which basically realized integrated and continuous monitoring for gas such as carbon mono xide in self ignite coal bed, mined out area, and burning section of each mine, and could forecast fire correctly and timely. It provide a realiable measure for early forecasting self ignite in mine.

Monitoring and Control System of Weighbridge Room in Coal Mine Based on CAN Bus

ZHANG Rong-cai , MAO Zhong-ming , JI Zhao-hui

2003, 29(6): 46-48.

<Abstract>(55)

Abstract:
The paper introduced a method about data collecting and management of coal weighbridge based on CAN bus and its realizing process. It also discussed in detail the system’s structure, hardware’s composing, software’s function and principle of CAN interface card.

Static Character Addition of Image of Industrial Televisio

WU Chun-yan, YU Zi-jie

2003, 29(6): 48-50.

<Abstract>(24)

Abstract:
The paper introduced the static character addition technology of image of industrial television. The working principle of the character addition circuit was analyzed, the characteristics of the circuit and its application in optical fiber industrial television system were discussed as well.

Application of the Device of Integrated Protection and Control for ZBK Model Belt Conveyor

YUE Liang

2003, 29(6): 50-51.

<Abstract>(41)

Abstract:

Design and Realization of a GIS Vetor-drawing System Based on VC

XU Shou-kun, MA Zheng-hua

2003, 29(6): 52-54.

<Abstract>(32)

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Hardware Design of Microcomputer Control System for Electric Shovel

SHENG Yi-fa, HONG Zhen-nan, XU Zu-hua