Study on Electrofusion Welding Process Based on Real-time Ultrasonic Phased Array Video Recording

2020 ◽  
Author(s):  
Yang-Ji Tao ◽  
Wei-Can Guo ◽  
Cun-Jian Miao ◽  
Jian-Feng Shi
Keyword(s):  
Real Time ◽  
Phased Array ◽  
Video Recording ◽  
Welding Process ◽  
Ultrasonic Phased Array

Real-Time 3D Imaging using an Air-Coupled Ultrasonic Phased-Array

2020 ◽  
pp. 1-1 ◽  
Author(s):  
Gianni Allevato ◽  
Jan Hinrichs ◽  
Matthias Rutsch ◽  
Jan Adler ◽  
Axel Jager ◽  
...  
Keyword(s):  
Real Time ◽  
3D Imaging ◽  
Phased Array ◽  
Ultrasonic Phased Array

Ultrasonic phased array contribution to the knowledge of the flow fusion welding process used to make the Roman large bronze statues

2013 ◽  
Vol 57 (4) ◽  
pp. 477-486 ◽  
Author(s):  
Aurélia Azéma ◽  
Florent Angelini ◽  
Benoît Mille ◽  
Gaëlle Framezelle ◽  
Daniel Chauveau
Keyword(s):  
Phased Array ◽  
Welding Process ◽  
Fusion Welding ◽  
Ultrasonic Phased Array

Real-Time Weld Penetration Depth Monitoring With Laser Ultrasonic Sensing System

2005 ◽  
Vol 128 (1) ◽  
pp. 280-286 ◽  
Author(s):  
Bao Mi ◽  
Charles Ume
Keyword(s):  
Real Time ◽  
Penetration Depth ◽  
Weld Pool ◽  
Phased Array ◽  
Welding Process ◽  
Analytical Relationship ◽  
Correlation Technique ◽  
Weld Penetration ◽  
Weld Quality ◽  
Sensing System

A real-time ultrasound-based system for controlling robotic weld quality by monitoring the weld pool is presented. The weld penetration depth is one of the most important geometric parameters that define weld quality, hence, remains a key control quantity. The sensing system is based on using a laser phased array technique to generate focused and steered ultrasound, and an electromagnetic acoustic transducer (EMAT) as a receiver. When a pulsed laser beam is incident on the surface of a condensed matter, either the thermoelastic expansion or ablation induces mechanical vibrations that propagate as ultrasound within the specimen. Both the ultrasound generation by the laser phased array and the reception by the EMAT are noncontact, which eliminates the need for a couplant medium. They are capable of operating at high temperatures involved in the welding process. The ultrasound generated by the laser phased array propagates through the weld pool and is picked up by the EMAT receiver. A signal-processing algorithm based on a cross-correlation technique has been developed to estimate the time-of-flight (TOF) of the ultrasound. The relationship between the TOF and the penetration depth of the weld has been established experimentally and analytically. The analytical relationship between the TOF and the penetration depth, which is obtained by the ray-tracing algorithm and geometric analysis, agrees well with the experimental measurements.

Enhancing Clinical Supervision Using High-Definition Real-Time Digital Recording, Annotation, and Bluetooth Technology

2019 ◽  
Vol 4 (2) ◽  
pp. 356-362
Author(s):  
Jennifer W. Means ◽  
Casey McCaffrey
Keyword(s):  
Graduate Students ◽  
Data Collection ◽  
Real Time ◽  
Clinical Supervision ◽  
Video Recording ◽  
Advanced Technology ◽  
High Definition ◽  
Recording Technology ◽  
Self Confidence ◽  
Additional Data Collection

Purpose The use of real-time recording technology for clinical instruction allows student clinicians to more easily collect data, self-reflect, and move toward independence as supervisors continue to provide continuation of supportive methods. This article discusses how the use of high-definition real-time recording, Bluetooth technology, and embedded annotation may enhance the supervisory process. It also reports results of graduate students' perception of the benefits and satisfaction with the types of technology used. Method Survey data were collected from graduate students about their use and perceived benefits of advanced technology to support supervision during their 1st clinical experience. Results Survey results indicate that students found the use of their video recordings useful for self-evaluation, data collection, and therapy preparation. The students also perceived an increase in self-confidence through the use of the Bluetooth headsets as their supervisors could provide guidance and encouragement without interrupting the flow of their therapy sessions by entering the room to redirect them. Conclusions The use of video recording technology can provide opportunities for students to review: videos of prospective clients they will be treating, their treatment videos for self-assessment purposes, and for additional data collection. Bluetooth technology provides immediate communication between the clinical educator and the student. Students reported that the result of that communication can improve their self-confidence, perceived performance, and subsequent shift toward independence.

The idiodynamic method: willingness to communicate and anxiety processes interacting in real time

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Peter D. MacIntyre ◽  
Tammy Gregersen
Keyword(s):  
Real Time ◽  
Complex Dynamics ◽  
Video Recording ◽  
Research Participant ◽  
Willingness To Communicate ◽  
Human Communication ◽  
Cognitive States ◽  
Communication Anxiety ◽  
Observer Ratings ◽  
Teacher Empathy

Abstract The idiodynamic method is a relatively new mixed-method approach to studying in real time the complex dynamics of integrated affective and cognitive states that interact continuously with human communication. The method requires video recording a sample of communication from a research participant and then using specialized software to play the video back while collecting contemporaneous self-reported ratings (approximately one per second) on one or more focal variables of interest to the researcher, such as willingness to communicate (WTC) or communication anxiety (CA). After the participant rates the communication sample, a continuous graph of changes in the focal variable is printed. The final step is to interview the speaker to gather an explanation for changes in the ratings, for example at peaks or valleys in the graph. The method can also collect observer ratings that can then be compared with the speaker’s self-ratings. To date, studies have been conducted examining WTC, CA, motivation, perceived competence, teacher self-efficacy, teacher empathy, and strategy use, among other topics. The strengths and limitations of the method will be discussed and a specific example of its use in measuring WTC and CA will be provided.

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