scholarly journals Random Access Addressing of MEMS Electrostatic Shutter Array for Multi-Object Astronomical Spectroscopy

Micromachines ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 782
Author(s):  
Xufeng Liu ◽  
Takuya Takahashi ◽  
Masahiro Konishi ◽  
Kentaro Motohara ◽  
Hiroshi Toshiyoshi
Keyword(s):  
Control System ◽  
Hysteresis Loop ◽  
Microelectromechanical Systems ◽  
Random Access ◽  
Cover Plate ◽  
Extended Version ◽  
Release Behavior ◽  
Movable Electrode ◽  
Galactic Astronomy ◽  
Through Hole

An extended version of cross-bar type addressing technique is developed for three-port electrostatic micro shutters arranged in an arrayed format. A microelectromechanical systems (MEMS) shutter blade suspended by a pair of torsion beams works as a movable electrode that is either attracted upwards to the cover plate to close the aperture or retracted downwards into the through-hole to open it. Tri-state positioning of the shutter—i.e., open, rest, and close—is controlled by the hysteresis loop of the electrostatic pull-in and release behavior using the combination of the voltages applied to the shutter, the cover, and the substrate. Random access addressing of the shutters is demonstrated by a control system composed of MATLAB-coded Arduino electronics. The shutter array developed in this work is for a sub-cluster of a reconfigurable shutter array under development for a multi-object galactic astronomy.

scholarly journals Application of Computer System in Control and Programming of a Robotized Soldering Station

2019 ◽  
Vol 252 ◽  
pp. 02008
Author(s):  
Andrzej Milecki ◽  
Roman Regulski ◽  
Dariusz Sędziak ◽  
Piotr Owczarek ◽  
Zbigniew Proch
Keyword(s):  
Control System ◽  
Visual System ◽  
Computer System ◽  
General Structure ◽  
Data Retrieval ◽  
Robot Programming ◽  
System Software ◽  
Printed Circuits ◽  
Computer Based ◽  
Through Hole

This paper describes a new robotized station for soldering of through-hole elements on printed circuits boards (PCB). The general structure of this station with the SCARA type robot is presented along with the computer-based control system. The software prepared for control and for the programming procedures is described. The developed computer system software, whose structure is also presented, is applied for robot programming. The first main aim is to develop the data retrieval from the Gerber file and to use them to direct soldering robot programming. The second aim of the research presented in this paper is the application of the visual system for pads coordinate recognition. The system is presented and verified.

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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