工矿自动化

A New Networking Method of Underground Wireless Communicatio

SUN Ji-ping , TIAN Zi-jian , LIANG Liang , LIU Kun

2003, 29(2): 1-4.

<Abstract>(46)

Abstract:
A new networking method that suits with underground working condition was introduced in the paper. Networking adopted cell system of frequency reusing, base station had 1 carrier frequency, 3 traffic channels and 1 specific signaling channel, radius of a cell is 500 m, adopted TDMA as measure of multi address. In order to improve call loss rate and update the safety of communication system to avoid appearing fade area when base station had fault, a method which allowed two mobile phone to perform point to point communication directly at the range of 0.5 km was introduced. In the process of point to point communication, two mobile phone can receive singling of base station respectively as well.

Fuzzy Control of Auto-discharging System for Jigger Based on PLC

MA Xi-zheng, YANG Jie-ming, CHEN Dong-bing

2003, 29(2): 4-6.

<Abstract>(34)

Abstract:
The paper introduced the application of fuzzy control technology in auto|discharging system for jigger and gave realizing process of fuzzy controller. It also described the performances of controller designed by fuzzy control theory and adjusting method for parameter in detail. It proved that the controller had excellent control effect.

Study on Intelligent Soft Starting System of Motor

YANG A

2003, 29(2): 6-8.

<Abstract>(30)

Abstract:
The paper introduced the soft starting system of asynchronous motor controlled by 80C196KB, and gave the mathematic model of the system and designing method of the software. Compared with traditional starting devices, this system had advantages such as lower starting current, slighter shock to power network, energy saving and multifunction protection. It had also features of high reliability and convenience in use.

Application of Niche Genetic Algorithm in Fuzzy Pattern Recognition of Gangues

XU Qi, KONG Li, LIU Wen-zhong

2003, 29(2): 9-11.

<Abstract>(57)

Abstract:
This paper described a fuzzy neural network(FNN) used for identification of gangues. The niche genetic algorithm(NGA)based on a proposed practical niche operator was responsible for the off line training of FNN. Furthermore, the test results showed that not only the off line trained FNN employing NGA had a satisfying global convergence, but also the fuzzy rules from the resultant quantitative FNN provided the separator with a higher recognition accuracy.

Features of Fieldbus and Its Development

LV Gang, TAN De-jian, MA Fang-qing

2003, 29(2): 12-14.

<Abstract>(54)

Abstract:
The fieldbus is one of the hotspot in the field of automation. Its appearance brings a great reform in control system. This paper briefly summarized the features and status of the fieldbus and pointed that the Ethernet and TCP/IP protocol would be the developing direction of the future fieldbus.

Application of TCR Dynamic Var Compensation Device in Coal Mine

SHI Xin , SUN Fang-gang

2003, 29(2): 14-17.

<Abstract>(35)

Abstract:
The application of TCR dynamic var compensation device in coal mine was mainly introduced in the paper. The basic principle of TCR was analyzed and composition of TCR dynamic var compensation device and its control system were also presented. The importance, limitation and some questions of the application of TCR dynamic var compensation in coal mine were illustrated.

Application of PWC318 in Σ-Δ A/D Convertor

HAN Ya

2003, 29(2): 17-19.

<Abstract>(28)

Abstract:
The paper introduced the construction and characteristics of Σ Δ A/D convertor, proposed a new idea of realizing Σ Δ A/D conversion by combining hardware and software. It also presented hardware and software design of Σ Δ A/D converting circuit with PWC318, integrator, comparator and 89C52.

On-line Monitoring for Braking Moment of Disk Braking System

GONG Zhi-jie , DONG Jun , LIN Shi-yong

2003, 29(2): 19-20.

<Abstract>(52)

Abstract:
The paper presented that braking moment of disk brake was important for hoisting safety, and introduced the principle and method using a displacement transducer and PC to monitor braking moment on line.

Intelligent Grouping Protector of Motor Used in Coal Mine

YU Dao-yang

2003, 29(2): 21-22.

<Abstract>(41)

Abstract:

Design of Fault Safety for Digital Control Hoist

WANG Gong-hua, YANG Feng-zhong, WANG De-tang, HAO Sheng-feng

2003, 29(2): 22-24.

<Abstract>(61)

Abstract:

Design of Intelligent Monitoring Outstation Based on Rabbit2000

KONG Xiu-hong , CHEN Zhi-guo , QIAN Jian-sheng , ZHANG Gang , TIAN Zhong-suo , FEI Yun-he , WU Zhao-he

2003, 29(2): 24-26.

<Abstract>(41)

Abstract:
The paper introduced the designing method and key technology of a new intelligent monitoring outstation using Rabbit2000 and the performance of the outstation, which solved the difficult problem about data collecting of production and safety information for wideband network building in coal mine and made it possible to realize wideband network in coal mine.

Application of PLC in the Control System of Two-sector Gas Producer

DENG Xiao-yun, LU Shi-kui, FENG Ai-wei

2003, 29(2): 26-27.

<Abstract>(28)

Abstract:

Analysis of Single-phase Grounding Over-voltage of Power Network in Mine and Its Harm

LIU Chun-sheng, PENG Hong-xing, YI Xiao-zheng

2003, 29(2): 28-30.

<Abstract>(35)

Abstract:
Combining particularity of production and its power system in mine, all kinds of single phase grounding over voltage were analyzed specially, and their harmfulness was discussed, so that the precautionary measures and the protective measures were taken, and safety in operation of mine power system was ensured.

Application of GM12641 Dot-matrix LCD in Portable Instruments

HU Xia, ZHAO Gui-fang

2003, 29(2): 30-32.

<Abstract>(37)

Abstract:
The main characteristics of GM12641 LCD module, electric speciality and its instruction were presented in the paper. Besides program design, interface circuit between the module and MCS 51 single chip microcomputer was also given.

Study on the Problem about Misalignment of Belt Conveyor

GAO Chao-min, MA Ren-gui

2003, 29(2): 33-34.

<Abstract>(36)

Abstract:

Ventilation Performance Testing Based on Computer-aided Data Processing System

DING Wei-long, PAN Di-li

2003, 29(2): 35-36.

<Abstract>(25)

Abstract:
The paper introduced the ventilation performance testing based on computer aided data processing system, which included designing method, menus and programme design. It proved that this system has characteristics with convient operation and accurate results in practical application.

Image Monitoring and Control System of Power Dispatching Based on Web Video Server

ZHU Nai-peng, LI Ming-xin, LIU Yan, GU Ju

2003, 29(2): 37-38.

<Abstract>(42)

Abstract:

Water Supply System with Constant Voltage Based on Frequency Conversion and Speed Regulatio

LI Jiang-tao

2003, 29(2): 39-40.

<Abstract>(59)

Abstract:

Measures of Improving Measuring Accuracy of Pressure Ability in Model KJ11 Automatic Monitoring System of Pressure Ability Used in Mine

ZHOU Li