工矿自动化

Application of Two-mode Fuzzy Controller with Self-organizing and Self-regulating Factor in PMLSM Precise Servo-system

LV Gang, LI Yu-dong, JIAO Liu-cheng

2004, 30(2): 1-4.

<Abstract>(25)

Abstract:
For servo-system of permanent magnet linear synchronous motor (PMLSM), the paper gave a new fuzzy controller with self-organizing and self-regulating factor. This controller can get fuzzy rules automatically with few expert experiments and improve its static and dynamic characteristics. Two-mode fuzzy controller without steady-state error were designed, which improved dynamic speed of response and static precision of servo-system. The experiment results showed that the servo-system has some advantages such as strong ability of self-organizing and self-study, quick tract, precise location and strong robustness.

Discerning Direction by Software for Encoder Sensor and Its Realizatio

WU Chao, ZHENG Feng-long

2004, 30(2): 5-6.

<Abstract>(64)

Abstract:
When using encoder sensor in precise measurement, the shaking of rotation axis can cause change of output waveform of sensor and wrong count. The paper began with analysis of waveform, then put forward a method based on software, which solves the above-mentioned problems and simplifies the design of circuit.

Design of Communication Interface of Slave Station Based on DeviceNet Fieldbus

WANG Xue, GAN Yong-mei

2004, 30(2): 7-10.

<Abstract>(20)

Abstract:
Being a kind of bottom-layer device interconnect technology, DeviceNet has broad application in industrial field. This paper introduced the design of communication interface of slave station based on DeviceNet fieldbus, the hardware circuit and software designing in detail.

Study on Selective Leakage Protection System Based on Natural DC

SHEN Xiang-yun, YUAN Zhen-hai

2004, 30(2): 10-13.

<Abstract>(27)

Abstract:
On the basis of analyzing disadvantages of principle for all kinds of existing selective leakage protection, this paper analyzed a selective leakage protection system of natural DC according to two branches distribution networks. Finally the selective principle was proved to be feasible.

Simulation of Cycloconverter and Measurement of Zero-current

ZHOU Juan, ZHANG Xian-feng

2004, 30(2): 13-15.

<Abstract>(29)

Abstract:

Discussion on Possibility of Bluetooth Technology Used in Mine Communicatio

ZHENG Guo-xin, WANG Mi

2004, 30(2): 15-17.

<Abstract>(28)

Abstract:
The paper discussed the possibility of bluetooth technology used in mine communication, expounded and proved the applicability of wireless transmission, and put forward the bluetooth technology can be used some places in mine according to characteristics of this technology.

Present Situation of Measuring Technology for Harmonics of Electrified Wire Netting and Its Development

FU Zhou-xing, ZHAO Yong-xiu

2004, 30(2): 18-21.

<Abstract>(30)

Abstract:
Along with the extensive application of nonlinear load, the problem of quality of electric energy became strictness increasingly. On the basis of essentiality of measurement of harmonic of electrified wire netting, the paper looked back developed history of measurement of harmonic in electrified wire netting at home and abroad, analyzed some characteristrics of measuring principle of harmonic in electrified wire netting, gave deve-loping prospect of measuring technology of harmonic of electrified wire netting in our country.

Design and Implementation of RTU Remote Measurement Unit Based on Dual-CPU

NI Yun-feng

2004, 30(2): 22-24.

<Abstract>(31)

Abstract:
The paper introduced a product that designed and implemented for the GEA-2000A remote measurement unit. It introduced the designing idea of RTU remote measurement unit based on dual-CPU, described aspects of hardware structure and software design by detailed data. It emphatically analyzed the problem of data matching of DRAM in data acquisition and processing system based on multi-CPU. It put forward a new matching method for dual-CPU in writing and reading DRAM. The experiment result demonstrated that using dual-CPU mode can improve processing speed and reduce time of data transmission.

Design of Power Protection Module of Three-phase Asynchronous Motor

ZHU Jiang-tu~, WANG Qun~, QI Ben-sheng~

2004, 30(2): 25-27.

<Abstract>(42)

Abstract:
An useful protection module of three-phase power was introduced in this paper. The module can detect each power faults such as phase lines opened, voltage of three-phase unbalanced, phase line reversed, etc. The module was completed fully by electronic components. And it’s working function was reliable and the price was lower. It can work as a protecting module of three-phase asynchronous motor or a control set of relay-contactors. So it has a high value in practice.

Using Delphi to Realize Serial Communication between Upper Computer and 984PLC

SI Ji-chu

2004, 30(2): 27-29.

<Abstract>(29)

Abstract:

Design of a Serial Bus with Low Power Waste and Its Applicatio

XU Le-nian, HUANG He-song, WU Chao

2004, 30(2): 29-30.

<Abstract>(27)

Abstract:

Application of Local Compensation Technology of Reactive Power of Intelligent Static Advancer in Winding Motor

SONG Yu

2004, 30(2): 31-32.

<Abstract>(35)

Abstract:

Application of On-line Fuzzy and Self-adaptive PID in Temperature Control of Diamond Synthesizing

JIA Zong-pu, LIU Qun-po, JIA Xiang-zhi, WANG Fu-zhong

2004, 30(2): 32-34.

<Abstract>(30)

Abstract:

Monitoring and Communication System Based on PON Technology Used in Coal Mine

ZHANG Shou-xiang, WANG Ru-lin, GUO Hui-ling

2004, 30(2): 35-37.

<Abstract>(46)

Abstract:
A new optical technology, PON (Passive Optical Network), was introduced in this paper, which is suitable for coal mine communication. The principle of PON and comparison of two kinds of technology, APON(ATM PON) and EPON (Ethernet PON), were analyzed. It is concluded that EPON will be used for coal mine monitoring and communication system. A design of PON model for mining use was completed and the PON technology may be spreaded out in coal mine.

Application of CAN Bus Technology in Electric Power Dispatching Automation System in Coal Mine

GAO Zheng-zhong, BO Jiang-zhi, XIN Xi

2004, 30(2): 38-39.

<Abstract>(29)

Abstract:

Ratio of Oxygen/Oil and Vapor/Oil of Gasification Furnace and Serial Control System of Temperature

XIANG Wen-jie, WANG Jian-mi

2004, 30(2): 40-41.

<Abstract>(24)

Abstract:

Application of Coal Blending Automation in Jiexiu Coal Washery

LUO Jian-guo, WU Jiang-ping, LU Cui-ping