1996 Vol. 22, No. 2

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Cover Catalogue
Model KDG-1 Anti-Noise Microcomputer-Based Communication System for Dispatching and Broadcasting
WU Jian-peng, ZHAO Guo-dong
1996, 22(2): 3-4.
<Abstract>(6)
Abstract:
The paper described main functions and anti-noise technique in an anti-noise microcomputer-based communication system for dispatching and broadcasting used in preparation plants.
Non-Contact Voltage and Current Sensor for Monitoring High Voltage Cable Status
ZONG Wei-lin, ZHAO Ying-lin, DENG Xian-ming
1996, 22(2): 5-8.
<Abstract>(9)
Abstract:
The paper described a non-contact three-state voltage current sensor for use in monitoring operating status for high voltage cable underground, and their principles, coding methods to identify cable operating status.
Current Harmonic Suppression by Multi-Rectifier Supplying Power to D.C.Motor
MENG Qing-chun, ZHANG Qing-xi
1996, 22(2): 8-10.
<Abstract>(41)
Abstract:
From the point of view of suppressing current harmonic, the author put forward utilizing multi-rectifier to supply power to d.c.motor and controlling the relationship between on-off time for each pulse rectification and current phase for each rectifier.Simulation test result is also given out.
Model KTH1 Automatic Telephone with Amplifying
SHAO Guo-qiang
1996, 22(2): 11-14.
<Abstract>(32)
Abstract:
This paper described a telephone which has automatic telephone functions and special functions like ringing amplifying, speech broadcasting and so on.
Muliti-Media Dispatching System for Comprehensive Monitoring Used in Coal Mine
LIU Fu-qiang, CHEN Ying
1996, 22(2): 14-18.
<Abstract>(52)
Abstract:
Multi-media production dispatching command system is the application of multi-media technology in coal mine safety monitoring and management. The system, which has expanded existing equipment and system underground, is characterstic of real-time monitor, emergency rescue and accident analysis and can improve working efficiency greatly.
The Study of the Tunneller′s Fault Diagnostic Expert System
CHEN Xian-zhong
1996, 22(2): 18-20.
<Abstract>(13)
Abstract:
The fault diagnostic and repair decision expert system of AM-50 tunneller hydraulic system was established. The test showed that the diagnostic result was valid and repair decision was available.
Narrow-Band Transmission of Underground Picture Signals in Coal Mines
WANG Yan-fen, ZHANG Shen, DI Jing
1996, 22(2): 21-24.
<Abstract>(36)
Abstract:
The author introduced an underground picture signal narrow-band transmission system, system features and the two key technique, pictur compression coding and frame storage. System application prospect is also described.
Automatic Dispatching Control System for Trucks in Open cast Coal
LI Kai-sheng
1996, 22(2): 24-26.
<Abstract>(10)
Abstract:
This paper discussed system composition, working principle and communicationcontradiction analysis and testing method of a microcomputer-based truck production dispatching control system.
1996, 22(2): 27-28.
<Abstract>(41)
Abstract:
Principle and Implementation of Microcomputer-Based Line Protectio
SHANG Li-qun, YANG Zhong-ping, ZHANG Yan-mei
1996, 22(2): 29-31.
<Abstract>(26)
Abstract:
Software and hardware composition and main functions were coverd in this paper for a microcomputer-based line protection system.
Model KGF1 Mine Use Ultrasonic Air Velocity and Volume Sensor
JIANG Yu-hua
1996, 22(2): 31-33.
<Abstract>(53)
Abstract:
This paper described ultrasonic detection principle and signal processing method used in ultrasonic air velocity and volume sensor.
Subjects Affecting the Stability of Methane Sensor and Improving Approaches
GONG Meng-jun, CHEN Xi, HONG Yong-rong
1996, 22(2): 34-36.
<Abstract>(39)
Abstract:
Through analysis on subjects affecting stability and measuring accuracy of methane sensor, the author pointed out the approach to improve sensor stability and reliability from the point of view of instrument type selection, parameter debugging, maintenance and checking method. 更多还原
Developing Our Country′s Explosion-proof Special Rubber-tyred Battery Locomotive
LIN Xiang-dong
1996, 22(2): 37-40.
<Abstract>(24)
Abstract:
Based upon induction of the rubber tyred battery locomotive at home, the author pointed out the guidance ideas of developing the locomotive.
MAX1480B in the Application of Model KJD-2 Monitoring and Control System for Belt Conveyors
WEI Ji-xiang
1996, 22(2): 41-44.
<Abstract>(32)
Abstract:
This paper described a complete, electrically isolated RS-485 data interface chip MAX1480B, and the problem to be alerted when it forms communication system with single chip microcomputer AT89C51.
1996, 22(2): 44-46.
<Abstract>(38)
Abstract:
Communication Interface Circuit for Microcomputer and Single Chip Microcomputer
ZHANG Xiao-qiang, YU Hong-zhen, XU Li-zhong
1996, 22(2): 47-50.
<Abstract>(40)
Abstract:
After introducing several practical communication interface circuits for microcomputer and single chip microcomputer networking, the author put forward a communication interface circuit utiliazing RS-422 which is simple in structure and can implement long-distance multi-point communication conveniently and reliably.
1996, 22(2): 50-52.
<Abstract>(29)
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1996, 22(2): 52-55.
<Abstract>(51)
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1996, 22(2): 55-56.
<Abstract>(30)
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Composite Gear Pump of High Volt Balancing Type
XIE Ji-sheng
1996, 22(2): 57-60.
<Abstract>(79)
Abstract:
In order to reduce the radial load for hydraulic gear pump, in this paper a high volt composite gear pump of novel structure was introduced. Because it is special in structure and working principle, it can reduce radial load for the pump and strikingly improve the performance.
1996, 22(2): 60-62.
<Abstract>(43)
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1996, 22(2): 63-64.
<Abstract>(31)
Abstract:
1996, 22(2): 64-66.
<Abstract>(9)
Abstract:

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