工矿自动化

Computer Vision Device in Production of Floatation Industry

WANG Wei-xing

2002, 28(6): 1-4.

<Abstract>(73)

Abstract:
This is a EU research project with an investment about 1.3 million EU dollars. From 1997 to 2000, three EU countries, four Universities and two large industrial companies were involved in the project. The main contents in the project are :(1) Set up a image acquisition system. (2) Image processing and sementation. (3) Image analysis and mineral concentration modeling. (4) Production (processing) control. The key of the project is to use computer vision, instead of human eyes, to monitor the variation of mineral froth in real time, and the research results have been applied into industry. Currently, there are about thirteen computer vision systems have been used in European countries.

Serial Communication with PLC by MSComm ActiveX

JU Rong, JU Yong

2002, 28(6): 5-7.

<Abstract>(27)

Abstract:
The method of serial communication between computer and PLC by MSComm ActiveX of VB is explained with examples of application, which has been applied successfully in electrical control system of a mine.

Study on Internet Remote Control of Digital Servo-system

DENG Zhi-liang , JIANG Wen-gang , XIE Cheng-xiang

2002, 28(6): 7-9.

<Abstract>(33)

Abstract:
This paper gave a method of the Internet remote control of digital servo system. The key techniques and faced problems in application practically were researched.

Performances Analysis of Anti-disturbance of Direct-sequence Spread-spectrum System

WU Ming-jie, ZHANG Wei

2002, 28(6): 10-12.

<Abstract>(86)

Abstract:
Spread spectrum communication is suit to coal mine communication, which has some advantages such as strong anti disturbance, easy to realize CDMA. So introducing the new technology of spread spectrum communication can promote the mine communication and achieve the demand of modernization. The paper analyzes resist ability for all kinds of disturbances in spread spectrum system, and calculates the processing gain for these disturbances.

Research on the On-line Measuring for Arrester

HAN Yan, XU Yu-ming

2002, 28(6): 13-15.

<Abstract>(33)

Abstract:
The paper gave a brief introduction of the principle and feasible design about the on line measurement for arrester with the presentation of the measuring system’s theoretical system, hardware make up, diagram of electric principle, flow chart of software, and presented the anti disturbance measurement.

Study on Computer Automatic Control of Diffuse Stove

ZHU Yu

2002, 28(6): 16-18.

<Abstract>(30)

Abstract:
This paper analysed the characteristics of direct control and two level PC control of diffuse stove, and introduced the methods used in the control. It gave the object of group control of diffuse stove by the examples of modern hardware and software.

Analysis and Research of Network Intrusion-detection System (NIDS)

GONG Shang-fu, ZHAO Wei

2002, 28(6): 18-20.

<Abstract>(26)

Abstract:
The paper discussed the significance of network security and introduced some traditional techniques of network security, analysed and researched the model and the theory of intrusion detection system. It also introduced the research developments inward and outward of NIDS. At last it presented the research and development trend of NIDS.

Structure Analysis of Automatic Drill

SHI Wan-zhou , XU Shi-fan , HE Feng-you , JIANG Chuan

2002, 28(6): 21-23.

<Abstract>(83)

Abstract:
Based on the robotized automatic drill(RAD), the structure analysis of complex system was studied briefly in the paper. Human machine relation of the system used in special environment was proposed. Then the sub system′s configuration of RAD was analysed. The design of fault tolerance, control and diagnosis of the main control unit were introduced finally.

Calculation of the Temperature Difference Between the Top and Bottom of Vapor-bag of Coal-boiler

XUE Guo-xin, XIAO Li-chua

2002, 28(6): 24-25.

<Abstract>(27)

Abstract:
During the starting process of coal boiler, the speed of feed water should be limited to avoid thermal plastic deformation. The key for better understanding of this mechanism lies on calculation of the temperature difference between the top and bottom part of the vapor bag. During the starting process, the two phase flowing state inside the vapor bag changes continuously, making the related calculation of temperature distribution will be more complicated. Experimental and extrapolating method of math has been used to get the strength of thermal source inside the vapor bag. Limited element method has been used to solve the related thermal transferring problem, which got useful results.

Electric Coltrol System of Mine DC Digitized Hoist Based on PROFIBUS Network Structure

XU Xi-kang , HUANG Xian-hua , WANG De-tang , WANG Jin-quan , WANG Gong-hua , ZHEN Ben-guang

2002, 28(6): 26-28.

<Abstract>(32)

Abstract:
In the research of hoist control based on PROFIBUS network structure, a new electric control system of mine DC digitized hoist was developed which made the electric control system of hoist realize the requirement of digitalization and network.

System of Fault Diagnosis and Monitoring for Electric Haulage Shearer Based on Field-bus

LIU Yun-xia, HUANG Jing-wen, TAN De-jia

2002, 28(6): 29-31.

<Abstract>(44)

Abstract:

The Temperature Display and Control Device of Digitized Predeterminatio

HE Hong-jiang , WANG Zhen-tao , ZHAO Hong-hai

2002, 28(6): 31-33.

<Abstract>(60)

Abstract:
The paper introduced a kind of digital temperature control and display device which is made up of AD590. It can automatically indentify the postive and negative difference between controlled temperature and surrounding temperature, and realizes heating and cooling. The predetermined temperature step is 0.098 °C , so that it can realizes high precision control.

Development of Serial Communication Board Based on PC/104 Bus

QU Peng-yu, ZHOU Chun-liang

2002, 28(6): 33-35.

<Abstract>(38)

Abstract:

Application of PLC in Monitoring and Protection Device of Air Compressor

ZHOU Shu-ying

2002, 28(6): 36-37.

<Abstract>(31)

Abstract:

Design and Realization of Embedded Signal Processing Circuit of Gas Sensor

NIE Xiao-hua, JIANG Jian-guo