A Holonic Chain Conveyor Control System: An Application

2009 ◽  
pp. 234-243 ◽  
Author(s):  
Jan Van Belle ◽  
Bart Saint Germain ◽  
Paul Verstraete ◽  
Paul Valckenaers ◽  
Osman Ali ◽  
...  
Keyword(s):  
Control System ◽  
Chain Conveyor

Intelligence Mining with Electro-Hydraulic Control Technology

2011 ◽  
Vol 201-203 ◽  
pp. 425-428
Author(s):  
Ming Xin Lu ◽  
Ming Feng Lv ◽  
Ju Guang Wang ◽  
Min Li ◽  
Jie Zhao ◽  
...  
Keyword(s):  
Control System ◽  
Fault Diagnosis ◽  
Control Technology ◽  
Hydraulic Control ◽  
Coal Face ◽  
Remote Operation ◽  
Speed Reducer ◽  
Cutting Height ◽  
Chain Conveyor ◽  
Hydraulic Control System

The underlying way to reduce accidents is reducing the number of workers on the coal face. Automatic mining can realize this object. The key for unmanned automatic mining is the application of electro-hydraulic control technology used on workface support. The electro-hydraulic control system applied in Wannian colliery has following function: Automatic moving , lowering and rising of support, monitoring and display of roof pressure; Shearer locating, controlling of cutting height and shearer speed, remote operation and procedure running; Automatic tension of conveyor chain, conveyor operation with constant power and monitoring and fault diagnosis of conveyor speed reducer.

A controller for safe, convenient operation of LaB6 emitters on electron-beam instruments

1983 ◽  
Vol 41 ◽  
pp. 408-409
Author(s):  
W. J. Abramson ◽  
H. W. Estry ◽  
L. F. Allard
Keyword(s):  
Electron Beam ◽  
Control System ◽  
Thermal Shock ◽  
Appropriate Care ◽  
Electron Guns ◽  
Tungsten Filaments ◽  
Order Of Magnitude ◽  
Main Components

LaB6 emitters are becoming increasingly popular as direct replacements for tungsten filaments in the electron guns of modern electron-beam instruments. These emitters offer order of magnitude increases in beam brightness, and, with appropriate care in operation, a corresponding increase in source lifetime. They are, however, an order of magnitude more expensive, and may be easily damaged (by improper vacuum conditions and thermal shock) during saturation/desaturation operations. These operations typically require several minutes of an operator's attention, which becomes tedious and subject to error, particularly since the emitter must be cooled during sample exchanges to minimize damage from random vacuum excursions. We have designed a control system for LaBg emitters which relieves the operator of the necessity for manually controlling the emitter power, minimizes the danger of accidental improper operation, and makes the use of these emitters routine on multi-user instruments.Figure 1 is a block schematic of the main components of the control system, and Figure 2 shows the control box.

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