On-line Visual Inspection Of Automobile Display Panels

1985 ◽  
Author(s):  
R M. Atkinson ◽  
J F. Claridge ◽  
S R. Hattersley ◽  
J C. Taunton
Keyword(s):  
Visual Inspection ◽  
On Line

Impact of Feedback Training in Cbt in Visual Inspection

2002 ◽  
Vol 46 (25) ◽  
pp. 2079-2083 ◽  
Author(s):  
Jiao Ma ◽  
Colin G. Drury ◽  
Ann M. Bisantz
Keyword(s):  
Performance Measures ◽  
Performance Feedback ◽  
Visual Inspection ◽  
Search Time ◽  
Difficulty Level ◽  
Process Assessment ◽  
Computer Based Training ◽  
Feedback Training ◽  
On Line ◽  
Inspection Performance

Training has been a consistently effective intervention in improving inspection performance. For example, existing inspection training in the aircraft maintenance domain is mainly a combination of classroom and on-the-job training (OJT). Computer-based training (CBT) has been promoted ever since it was introduced to this domain. In this study we investigate how effectively feedback training can be combined with CBT to improve visual inspection performance. Specifically, we examine the potential positive impacts of performance and process feedback in CBT, given in an on-line manner, on a trainee's performance and process assessment in a visual inspection task. The CBT system for inspection we used was adopted from the ASSIST program (Chen, Gramopadhye and Melloy, 2000). In our computer simulation of a familiar situation, participants were asked to search certain areas inside of a car in order to detect certain targets (dropped coins) with the aid of computerized tools (e.g., a magnifying glass, a flashlight), and fill out an inspection report based upon detection. A significant test effect was found across performance measures. Type of feedback training was found to be significant for search time. Performance measures were significantly correlated with target difficulty level; on-line performance feedback was significantly more efficient in improving performance measures than conventional delayed performance feedback; feedback training did affect process assessment measures.

Generator Stator End Winding Resonance: Problems and Solutions

2013 ◽  
Author(s):  
Bill Moore ◽  
Clyde Maughan
Keyword(s):  
Visual Inspection ◽  
Fatigue Cracking ◽  
Vibration Monitoring ◽  
Stator Winding ◽  
Resonant Vibration ◽  
Primary Methods ◽  
Stator Windings ◽  
Problems And Solutions ◽  
On Line ◽  
Generator Stator

Stator windings that are in resonance will have high levels of vibration, if not properly damped or braced. Windings in resonance can suffer from early conductor strand fatigue cracking, arcing and failure during operation. Evidence of high vibration can sometimes be seen through visual inspection, with observance of dusting and greasing. There are two primary methods to anticipate and detect end winding resonant vibration — the bump test and on-line monitoring. Both are important and play a key role in identifying stator winding resonance problems, as well as implementing the appropriate solution. This paper will discuss the reasons that stator end winding resonance occurs. The technology, as well as the advantages and limitations of both the bump test and vibration monitoring, will be discussed. Solution approaches to end winding vibration are included, as well as one case history.

Crossover is not a consequence of neglect: A test of the orientation/estimation hypothesis

2002 ◽  
Vol 8 (1) ◽  
pp. 107-114 ◽  
Author(s):  
MARK MENNEMEIER ◽  
ELSIE VEZEY ◽  
MELISSA LAMAR, ◽  
GEORGE JEWELL
Keyword(s):  
Brain Injury ◽  
Visual Inspection ◽  
Right Hemisphere ◽  
Line Bisection ◽  
Crossover Effect ◽  
Spatial Direction ◽  
Length Estimation ◽  
On Line ◽  
Left And Right ◽  
Pattern Of Performance

Most patients with neglect demonstrate a crossover effect on line bisection. Crossover refers to a pattern of performance in which long lines (>10 cm) are bisected ipsilateral to brain injury and short lines (<2 cm) are bisected contralateral to brain injury. Crossover bisections on short lines are of interest because they are not predicted by contemporary theories concerning neglect. However, we propose that the effect depends on two independent factors that normally influence bisection performance but are merely exaggerated in neglect—a tendency to overestimate the length of short lines and underestimate long lines and a tendency to orient attention preferentially in one spatial direction. We predicted that both patients with unilateral left and right hemisphere injury would demonstrate crossover on line bisection and that they would overestimate short lines and underestimate long lines upon direct visual inspection. Further, the 2 groups were predicted to demonstrate crossover in opposite directions owing to different lesion-induced biases in attentional orientation. Testing 5 patients with right hemisphere injury and 7 patients with left hemisphere injury confirmed each prediction. Additionally, errors in length estimation were exaggerated among patients with right hemisphere injury, most of whom had neglect. It is concluded that while crossover is accentuated in cases of neglect, it is not a consequence of neglect per se. As such, crossover bisections are not at odds with contemporary neglect theory. (JINS, 2002, 8, 107–114.)

scholarly journals Automated Visual Inspection of Ship Hull Surfaces Using the Wavelet Transform

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Carlos Fernández-Isla ◽  
Pedro J. Navarro ◽  
Pedro María Alcover
Keyword(s):  
Wavelet Transform ◽  
Visual Inspection ◽  
Cost Effective ◽  
Automated Visual Inspection ◽  
Decomposition Level ◽  
Ship Hulls ◽  
Reconstruction Scheme ◽  
Effective Operation ◽  
On Line ◽  
Selection Of

A new online visual inspection technique is proposed, based on a wavelet reconstruction scheme over images obtained from the hull. This type of visual inspection to detect defects in hull surfaces is commonly carried out at shipyards by human inspectors before the hull repair task starts. We propose the use of Shannon entropy for automatic selection of the band for image reconstruction which provides a low decomposition level, thus avoiding excessive degradation of the image, allowing more precise defect segmentation. The proposed method here is capable of on-line assisting to a robotic system to perform grit blasting operations over damage areas of ship hulls. This solution allows a reliable and cost-effective operation for hull grit spot blasting. A prototype of the automated blasting system has been developed and tested in the Spanish NAVANTIA shipyards.

On-line visual inspection techniques for quality control during the deinking of secondary fiber paper

1995 ◽  
Author(s):  
Stephen A. Jones ◽  
G. J. Awcock ◽  
R. L. Thomas ◽  
Kurt Humphrey
Keyword(s):  
Quality Control ◽  
Visual Inspection ◽  
On Line ◽  
Inspection Techniques
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