Laser-diode-based pseudo-heterodyne interferometer for online process control of wire bonders

2000 ◽  
Author(s):  
Andrew C. Lewin ◽  
F. Ritter ◽  
Georg Siegmund
Keyword(s):  
Process Control ◽  
Laser Diode ◽  
Heterodyne Interferometer ◽  
Online Process

Bench to Full-Scale Enhanced Primary Treatment of Municipal Wastewater under Wet Weather Flow for Minimized Pollution Load: Evaluation of Chemical Addition and Process Control Indicators

2020 ◽  
Author(s):  
Mirna Alameddine ◽  
Abdul Rahim Al Umairi ◽  
Mohammed Zakee Shaikh ◽  
Mohamed Gamal El-Din
Keyword(s):  
Process Control ◽  
Municipal Wastewater ◽  
Weather Conditions ◽  
Primary Treatment ◽  
Full Scale ◽  
Operation Conditions ◽  
Wet Weather ◽  
Slow Mixing ◽  
Load Evaluation ◽  
Online Process

The enhanced primary treatment of municipal primary influent under wet weather conditions was studied through a comprehensive approach from bench to full scale. The study delivered a practical solution for managing seasonal fluctuations in the influent wastewater by determining the most effective operation conditions for coagulation/flocculation. Three metal-based coagulants were tested through a series of jar tests. Alum outperformed other coagulants since 1 mg of Al added as alum with low mixing was able to remove 22 NTUs, 19 mg COD and 0.8 mg ortho-P. Three-factor ANOVA indicated that TSS removal depended mostly on rapid mixing while COD and ortho-P removals depended on slow mixing and coagulant dose. In bench and full-scale operations, the addition of polymer did not lead to any pronounced improvements. Finally, turbidity and percent ultraviolet transmittance showed good correlation with TSS and ortho-P which evokes their use as surrogates for micropollutants removal and online process control.

Online-Process Control of Air Bending for Thin and Thick Sheet Metal

2004 ◽  
Vol 15 (6) ◽  
pp. 455-462 ◽  
Author(s):  
B. Heller, ◽  
S. Chatti, ◽  
N. Ridane, ◽  
M. Kleiner,
Keyword(s):  
Process Control ◽  
Sheet Metal ◽  
Thick Sheet ◽  
Air Bending ◽  
Thick Sheet Metal ◽  
Online Process

scholarly journals Online Process Control of Alkaline Texturing Baths: Determination of the Chemical Concentrations

2014 ◽  
Vol 05 (03) ◽  
pp. 205-210
Author(s):  
Martin Zimmer ◽  
Katrin Krieg ◽  
Jochen Rentsch
Keyword(s):  
Process Control ◽  
Online Process

Online process control for directional solidification by ultrasonic pulse echo technique

Ultrasonics ◽  
2004 ◽  
Vol 42 (1-9) ◽  
pp. 105-108 ◽  
Author(s):  
A Drevermann ◽  
C Pickmann ◽  
R Tiefers ◽  
G Zimmermann
Keyword(s):  
Process Control ◽  
Directional Solidification ◽  
Ultrasonic Pulse ◽  
Pulse Echo ◽  
Online Process

scholarly journals Double heterodyne interferometer using a multimode laser diode

1994 ◽  
Author(s):  
Sen Han ◽  
E. Dalhoff ◽  
Edgar W. Fischer ◽  
S. Heim ◽  
Hans J. Tiziani
Keyword(s):  
Laser Diode ◽  
Multimode Laser ◽  
Heterodyne Interferometer ◽  
Multimode Laser Diode

New Rule to Incorporate Inspection Errors in Process Control Using Markov Chains

2020 ◽  
Vol 28 (01) ◽  
pp. 2150002
Author(s):  
William S. Griffith ◽  
Michelle L. Depoy Smith
Keyword(s):  
Process Control ◽  
Markov Chains ◽  
Inspection Errors ◽  
Inspection Process ◽  
Online Process ◽  
Number Of Authors

A number of authors have considered the procedure of online process control in which every [Formula: see text]th item produced is inspected. The process is judged to be in control and continues if the inspected item is judged to conform to specifications. If the inspected item is judged to be nonconforming, then the process is judged to be out of control and stopped, examined, and adjusted as necessary. This inspection process is subject to misclassification and different schemes have been suggested for dealing with this. In this paper, we propose a new rule in which the final judgment that an item is conforming, and thus the process is in control, if and only if [Formula: see text] consecutive classifications as conforming occur before a total of [Formula: see text] classifications as nonconforming. We will examine various aspects of this protocol and provide advice on how to determine values of [Formula: see text] and [Formula: see text] for this rule.

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