工矿自动化

A Demodulation Method of BPSK Signal with Large SNR

QI Ben-sheng, SHENG Hui-xing, GAO Yuan

2004, 30(1): 1-3.

<Abstract>(29)

Abstract:
A demodulation method of BPSK signal based on time measurement was presented in this paper. The theory of this method was introduced, and the experiment and its results were given too. It is a noncoherent demodulation method and can be achieved by software. So, little additional hardware is needed to implement the demodulation. Moreover, a clock can be generated to synchronize output data. This method is suitable for the demodulation of middle and low speed BPSK signal with large SNR.

Study on Electrical Control Device of 2 m Explosion-proof Cycloconverter Winch

WANG Xin , DU Qing-nan , LV Hong-qing

2004, 30(1): 3-5.

<Abstract>(21)

Abstract:
This paper presented the necessity of electrical control device of 2 m explosion-proof cycloconverter winch on the basis of analysis of the present situation of 2 m explosion-proof winch. The working principle of cycloconverter was described briefly. For the key technology of 2 m explosion-proof winch, a method of two-variable control theory was put out, and the full scope speed adjustment was solved by combining cycloconverter with speed and voltage adjustment. Therefore, a speed adjustment system of full open loop, non-circulation and non-dead time was achieved. Finally, the implementation method of this system was given.

Automatic Control System of Height Setting of Shearer Based on Single-chip Microcomputer

ZHANG Jun-mei , LI Wen-bin , FAN Xun , KANG Feng-yi

2004, 30(1): 6-9.

<Abstract>(30)

Abstract:
Based on the mathematic model of natural gamma radiation coal interface sensor, the automatic control system of height setting of shearer has been designed, including the control method, hardware components and the controller. This could be a control model for the automatic shearer.

Study on Detectability of Status Fault for Control System

HE Zao-hong , WU Xin-kai , LIU Xiang-yang , TANG Xiu-ming , HU Jun-da

2004, 30(1): 9-11.

<Abstract>(5)

Abstract:
The paper discussed the detectability of status fault of linear systems based on the construction of control systems, put forward and proved the conclusion that status fault of observable linear system can be detected.

Hardware Design of Measuring and Control Module of Auto-paver

NI Hong-jun, LI Ming

2004, 30(1): 12-14.

<Abstract>(15)

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Design of Loading Control System of Derrick Car

WANG Re

2004, 30(1): 14-16.

<Abstract>(14)

Abstract:
The design method of loading control system of derrick car based on ADμC824BS was introduced in this paper, the hardware principle block diagram and software flowchart of the control system were presen- ted. It has better anti-interference ability and high reliability.

Discussion on the Status of Research and Development about Data Base

XIONG Zeng-gang , ZHANG Xue-min , CHEN Jian-xin

2004, 30(1): 17-19.

<Abstract>(32)

Abstract:
Data base technology is the very important technology basis of modern information system. This paper analyzed the status of research and development of data base technology, and introduced several kinds of data base technology, such as Object Oriented Data Base, Distributed Data Base, Data Warehouse, Data Mining, Web Data Base, and so on. At the same time, it provided the application fields and the developing trends of data base technology.

Several Problems about Development of Modern Automatio

JIANG Chuan , XU Shi-fan

2004, 30(1): 20-23.

<Abstract>(28)

Abstract:
The paper discussed the relationship between automation and information in the information economic times and the place of automation in constraction informatization, it also gave out the trend of modern automation, the basic characteristics of comprehensive automation, integrated optimization for enterprise and some questions that should be settled up in development of modern automation.

Overview of Fieldbus Technology

WU Xin-zhong , QIAO Hong-ying , REN Zi-hui

2004, 30(1): 23-25.

<Abstract>(35)

Abstract:
The occurrence, meaning, characteristic and structure of fieldbus were expounded in this paper. Because there can not come to a standard on FCS now and recently, five popular and typical fieldbus standards were introduced. At last, the strategy on how to salute the current technique revolution on fieldbus was analyzed.

Application of EDA9033 in On-line Monitoring System of Ventilator Performance

WANG Yong, SONG Ai-shan, JIANG Shu-guang, WU Zheng-yan

2004, 30(1): 26-28.

<Abstract>(36)

Abstract:
This paper presented the characteristic of data collecting module of EDA9033 for measuring the three-phase electrical parameters of motor. The application of the module in the on-line monitoring system of main mine ventilator performance based on 80C552 SCM and long-distance communication system was introduced. It improved the monitoring accuracy and reliability for three-phase electrical parameters and integration of the system by using this module.

Data Collection Subsystem Based on ADμC812 and Its Application in Multi-channel Monitoring System of Temperature and Humidity

SHENG Xue-jun, WU Ping-hui, ZHOU Xiang-hong

2004, 30(1): 28-30.

<Abstract>(16)

Abstract:
This paper introduced the hardware construction and software designing method of the data collection subsystem based on ADμC812. Its application in multi-channel monitoring system of temperature and humidity was also introduced.

Design of Data Collection and Fussion System of Robot Based on ADμC812 and DSP

LIU Ying, TANG Dong-feng, HUANG Da

2004, 30(1): 30-32.

<Abstract>(18)

Abstract:

Implementation of Information Integration of Safety and Production Monitoring System for State Xinji Energy Co., Ltd.

ZHANG Zhi-hong, YANG Run-quan, DAI Lei

2004, 30(1): 33-35.

<Abstract>(29)

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An Interlocking Logic Control System Realized with LOGO!

LIANG Kai , FANG Kang-ling , WANG Chang-ping

2004, 30(1): 36-37.

<Abstract>(24)

Abstract:
This paper introduced an interlocking logic control system, which realized with Siemens LOGO! The hardware and software design of this system were given.

Structure Reform of Rectifier Transformer with High-voltage Silico

SHEN Jin-lin, WANG Zhu-hua

2004, 30(1): 38-39.

<Abstract>(16)

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2004, 30(1): 40-41.

<Abstract>(10)

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Research and Design of Fieldbus Network

TANG Ming

2004, 30(1): 42-43.

<Abstract>(17)

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Analysis of Technical Performance of Combinatorial Over-voltage Protector

LI Jin-peng, GUO Si-jun

2004, 30(1): 44-46.

<Abstract>(21)

Abstract:
This paper introduced the development of lighting arrester. It analyzed the fundamental principles and characteristic parameters of several combinatorial over-voltage protectors. The paper mainly approached their all-sidedness and reliability as well as self-safety. Its intention was to look for a certain over-voltage protec- ting device which can fit in our country’s electronic power development by analyzing the advantage and shortcoming of the protector.

Method of Improvement Reliability of Communication System of Multi Single-chip Microcomputers

LI Yong, YANG Yu-ju

2004, 30(1): 47-48.

<Abstract>(17)

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Time Set of Overload Protection Circuit of IC Type in 2.5 kVA Coal Electrical Drill

YANG Mao-yu

2004, 30(1): 49-50.

<Abstract>(11)

Abstract:
IC type overload protection circuit has gradually replaced thermal relay overload protection mode. The paper introduced the accurate time set of duration of overload and recovery time of reset.

Application of Monitoring and Control System in Mine Safety and Productio

ZHANG Ping-fang

2004, 30(1): 50-51.

<Abstract>(20)

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Network Management System of Mine Rent Equipment Based on B/S

CAI Mu-ying, ZHANG She

2004, 30(1): 52-53.

<Abstract>(12)

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Comparison of Some Operators of Edge Detectio

MA Yan, ZHANG Zhi-hui