工矿自动化

Study on Protection Technology of Overload and Open-phase of Minitype Flameproof Motor

PENG Hong-xing, LIU Chun-sheng

2003, 29(3): 1-3.

<Abstract>(27)

Abstract:
The existing defect of overload, open phase protection of minitype flameproof motor used in coal mine was analysed and its improved protection scheme was presented. The iterative algorithm which according with motor’s heat characteristic was used to protect dynamic overload, fault signal of open phrase was gained by adopting AC sampling and sequence filtration algorithm. Finally, the above schemes were analysed and calculated in detail and their realizing methods were given.

Application of Fault Diagnostic Technology in Insulation Fault Diagnosis of Electrical Equipment Used in Coal Mine

WU Chun-yan, YU Zi-jie, CHEN Zhou-ling

2003, 29(3): 3-5.

<Abstract>(36)

Abstract:

A Self-adapting Nerve Cell Controller Based on Auto-regulating System of Density of Heavy Medium

SI Shu-wei

2003, 29(3): 5-7.

<Abstract>(51)

Abstract:
In this paper, a self adapting nerve cell controller based on auto regulating system of density of heavy medium of coal preparation plant is designed. By constantly adjusting the parameters of the self adapting nerve cell controller, it can get better controlling effect than PID.

Analysis of Dynamic Performance of Close-loop Servo System

SHU Zhi-bing, PU Cheng-lan, SHAO Jun, ZHANG Wei

2003, 29(3): 8-10.

<Abstract>(49)

Abstract:
Servo system is a link between digital controlled device and machine tool. It is an important part of digital controlled systems, it accepts action pulses from servo controller. These pulses are amplified and converted to drive servo worktable. In this paper, the dynamic performance were presented and researched. The results can provide theoretical basis for rapid response and machining precision.

Application Research of Expert System in Fault Diagnosis and Processing of Simulation Training System

XIANG Yan, ZHAO Di-zhi

2003, 29(3): 11-13.

<Abstract>(38)

Abstract:
The main characteristic of intelligent simulation training system(ISTS) and simulation system based on knowledge is that the simulation system incorporates suitably with an expert system. The paper presented the important application of ISTS, using expert system to assist simulation training for fault diagnosis and processing, and an example developed by authors was also introduced.

A ASK Demodulation Method Based on Self-adaptive Filtering and Its Performance

QIAN Zhi-we

2003, 29(3): 14-16.

<Abstract>(41)

Abstract:
A amplitude shift keying(ASK) demodulation method based on adaptive filtering was discussed in this paper. The demodulation and performance of adaptive demodulation method to ASK signals was studied by Least Mean Squares algorithm(LMS) in common use. Simulation results of computer indicated that the adaptive demodulation method had better performance than the traditional demodulation method, and it is easy to realize by digital singnal processing(DSP) technology.

Application Research of H_∞ Control Theory in Flap Fin Stabilizer Control System

LIU Wei-ting, ZHANG Bing, JIANG Jian-guo

2003, 29(3): 16-19.

<Abstract>(28)

Abstract:

Using DS1820 Digital Temperature Sensor to Measure Temperature of Principal Axis of Mine Hoist

LI Hai

2003, 29(3): 20-22.

<Abstract>(46)

Abstract:
As bigger equipment in mine, mine hoists would influence the safety of the mine and person if they don’t work properly. DS1820 digital temperature sensor has many advantages such as high precision in measurement, convenience in linking, and can be used in measuring temperature of the principal axis of mine hoist to insure safety production. The working principle, realizing scheme and some problems in usage of measuring system were introduced in the paper.

Development of Automatic Hydraulic Tensioning Device

LI Cui-lan , SUI Zhen-yan , HUANG Jian-ren

2003, 29(3): 22-23.

<Abstract>(54)

Abstract:
In the basis of working principle of automatic hydraulic tensioning device, structure composing, control principle and function characteristics of the device were introduced in this paper. It also expounded the design key of the control system is to set pressure value and maxim drawing value.

Frequency Conversion Control System of Local Fan of Ventilator

GUO Jia-hu, WANG Jing

2003, 29(3): 24-25.

<Abstract>(77)

Abstract:
Frequency conversion control system of local fan of ventilator was introduced in this paper. According to parameter of gas consistency and control rule of fuzzy control, the system can adjust the rotate speed of ventilator, and realize the gas clean up efficiently and safely. Its result of energy saving is obvious.

Realizing of Backup Fixed-capacity Loading of Main Shaft Hoist and Protection of Coal Stacking at Conveyor Head

ZHANG Rui-ju

2003, 29(3): 26-27.

<Abstract>(66)

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A Method of Remote Signal Transmission of Substation Monitoring System

YAN Chuan-bao, CAO Shu-chu

2003, 29(3): 27-28.

<Abstract>(39)

Abstract:

Image Acquisition for Automatic Inspection of Surface Cracks of Workpieces

FAN Yong-fa, ZHENG Chang-hong

2003, 29(3): 29-30.

<Abstract>(51)

Abstract:
This paper dealed with image data acquisition for automatic inspection of surface cracks of workpieces. Taking a practical system as an example, implementation method of image acquisition by designing classes with VC++ was analyzed.

Digital Video Monitoring System and Its Applicatio

LIU Fu-qiang, LU Chi-ban

2003, 29(3): 31-33.

<Abstract>(48)

Abstract:
After brief explanation of video monitoring system’s development and shortcoming of analog video monitoring, the configuration of digital video monitoring was introduced in this paper as well as characte ristics and development direction.

Design and Implementation of Long-distance Transmission System of Industrial Television Image in Huaibei Mining (Group) Co., Ltd.

GU Jun , WANG Li-bin , GAO Shou-le , ZHANG Yi , CHEN Jin-bao , ZHU Xiao-ming , PI Yu

2003, 29(3): 34-36.

<Abstract>(32)

Abstract:
This paper introduced the design, implementation and its main characteristics of long distance transmission system of industrial television image in Huaibei Mining (Group) Co., Ltd. This System adopted two transmission methods of analog and digital signals, and realized functions such as image transmission, digital kinescope and kinescope query. It can provide viewable and reliable means for safety production, dispatching control, science policy decision and accident tracking.

Fault Analysis of High-voltage Power Cable and Its Detecting Technology

CHEN Peng-fei, LIU Shi-dong, XU Qing-bo, WANG Tai-xu

2003, 29(3): 37-39.

<Abstract>(37)

Abstract:

Design of Automatic Control System of Minitype Boiler of Cycle Flowing Bed

LIU Lei-ting, MAO Wei-qing

2003, 29(3): 39-41.

<Abstract>(26)

Abstract:

Long-distance and Centralized Control System of Main Belt Conveyor

ZHANG Yu-ying