工矿自动化

Study on Computer Control System of the Coal Slurry Flotatio

Yang Xiao-ping, Wu Cui-ping, Xu De-ping, Feng Shao-gua

2000, 26(4): 1-3.

<Abstract>(19)

Abstract:
The coal slurry ash detection is a nodus to on line material goods analyze in the coal preparation plant. Furthermore the ash control of the flotation concentrate can’t be set foot in it. This paper discusses the fundamental principle and the structure of the coal slurry detector, the composition and the work principle of the multi slurry ash detecting system, the basic struture and the working model of the computer control system of the coal flotation, and the using situation in Huaibei Coal Preparation Plant.

Automatic Control System for Prevention of Lump-coal Breaking

LUO Yu-qi, ZHANG Yong-fa

2000, 26(4): 4-5.

<Abstract>(22)

Abstract:

Design and Realization of Distributed Computer Control System Based on CAN Bus

Zhou Feng-yu , Xiao Hai-rong , Su Xue-cheng , Li Yi-bin , Li Cai-hong , Su Tao

2000, 26(4): 5-7.

<Abstract>(45)

Abstract:
CAN Bus is a prospective communication technology in the field bus area. Taking the first of large section shotcrete robot for example, this paper discussed the application of CAN Bus in distributed computer control system.

Research on Mine MF Inductive Communication System

WANG Wen-hua, SUN Ji-ping

2000, 26(4): 8-10.

<Abstract>(8)

Abstract:
The mine MF inductive communication system is analysed and studied, and a new type of MF digital inductive communication system underground is proposed in this paper. In this system, continuously variable slope delta modulation(CVSD) is used to change the analogy signal into digital, GFM is used to modulate the signal, FDMA, PLL frequency synthesizer. This system is provided with good speech quality, simple device and easy realization, good robustness against noise and attenuation, suitable for mine communication.

Application of Theory of Sliding Mode Variable Structure in AC Servo System

XIE Li-hua , WANG Ai-bing , WANG Ming-zheng

2000, 26(4): 11-14.

<Abstract>(13)

Abstract:
Theory of sliding mode variable structure and it’s present situation in AC servo systems are introduced in this paper. The control ideology, advantages and disadvantages are analyzed. Sliding mode variable structure control and other integrated control policies are also introduced. This paper points out that integrated control policy is a effective way to achieve excellent control.

Analyses and Research of Performances of Optical-receiver in Integrated Transmission Network for Coal Mine Underground

DING En-jie, WU Zeng, MA Mu-yan

2000, 26(4): 14-17.

<Abstract>(17)

Abstract:
A general method has been used in this paper to study the performances of front end of optical receiver, with the model of FET and various tuning networks. General formulas have been presented, with which the resonant frequency, SNR and transfer functions can be calculated. As a sample, the performance of a series resonant optical receiver is studied with the formulas presented in this paper.

Fuzzy Control of the Controllable Starting System for Belt Conveyor

JIANG Qi , YU Yan , JIANG Han

2000, 26(4): 18-19.

<Abstract>(21)

Abstract:
The paper analyzes the existing problems in the controllable starting system for belt conveyor that has been widely used in coal mine and puts forward fuzzy control method, then introduces the control principle and its implementation with PLC.

Study on Full-function Traffic Light Based on EDA

CHEN Li-la

2000, 26(4): 20-21.

<Abstract>(7)

Abstract:

A Kind of Centralized and Decentralized Control System with PLC

HU Sui-ya

2000, 26(4): 22-23.

<Abstract>(29)

Abstract:
A kind of centralized and decentralized control system with PLC is introduced in this paper by contrast method. This system has many particulars as compared with remote I/O control system which is widely used now, such as strong in generality, flexible in configuration, high in reliability, econnomic in investment and so on.

Positive Pressure On-line Monitoring for Disk Brake

HU Wan-zhong, YAO Fu-hai, WANG Ju

2000, 26(4): 24-25.

<Abstract>(41)

Abstract:

Application of CST Controllable Driving Device for Mine Conveyor

ZHENG Mao-qua

2000, 26(4): 26-27.

<Abstract>(11)

Abstract:

Development of Computer Control and Monitoring System for Dense Medium Suspension Parameters

ZHAO Chun-xiang

2000, 26(4): 28-29.

<Abstract>(30)

Abstract:
In dense medium coal preparation process, the changes of suspension technological parameters obviously affect the coal preparation result. The paper introduces the designing principle, system structure and software development of computer control and monitoring system.

Analysis of Automatic Regulating Principle for Turbulent Coil

SHI Chao

2000, 26(4): 30-31.

<Abstract>(13)

Abstract:

2000, 26(4): 32-33.

<Abstract>(46)

Abstract:

The Dissipated Heat, Vibration-proof and Maintenance of Variable-frequency Speed Regulating Device in AC Electrical Haulage Shearer

XU Sen-xiang , YING Xiao-mi

2000, 26(4): 34-35.

<Abstract>(28)

Abstract:
This paper has a discussion on the dissipated heat, vibration proof and maintenance of variable frequency speed regulating device in AC electrical haulage shearer, and puts forward some basis of design and methods of maintenance.

Protection Circuit for Motor's Open-phase Running

WANG Da-zhou, LU Shi-kui

2000, 26(4): 36-37.

<Abstract>(16)

Abstract:

Application of Automatic Loading System in Daliuta Preparation Plants

BAO Ya-ping

2000, 26(4): 37-38.

<Abstract>(15)

Abstract:

Cipher Code Installing Technology for Prevention Misoperation on Keyboard

HUANG Hong-yong