Results 271 to 280 of about 89,157 (306)
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The Journal of the Acoustical Society of America, 1994
A system for real-time analysis of weld quality in an arc welding process. The system includes a transducer which receives acoustic signals generated during the welding process. The acoustic signals are then sampled and digitized. A signal processor calculates the root mean square and peak amplitudes of the digitized signals and transforms the ...
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A system for real-time analysis of weld quality in an arc welding process. The system includes a transducer which receives acoustic signals generated during the welding process. The acoustic signals are then sampled and digitized. A signal processor calculates the root mean square and peak amplitudes of the digitized signals and transforms the ...
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The Journal of the Acoustical Society of America, 1984
A system and method are disclosed for monitoring the acoustic intensity of ultrasonic energy applied to a body by an ultrasonic probe for the purpose of diagnosing an internal target. The probe contacts a limited area of the body skin and a coupling medium, such as a coupling gel, is interposed to enhance acoustic coupling between the probe and the ...
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A system and method are disclosed for monitoring the acoustic intensity of ultrasonic energy applied to a body by an ultrasonic probe for the purpose of diagnosing an internal target. The probe contacts a limited area of the body skin and a coupling medium, such as a coupling gel, is interposed to enhance acoustic coupling between the probe and the ...
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An Automatic Acoustic Bathroom Monitoring System
2005 IEEE International Symposium on Circuits and Systems, 2005A key element in caring for and treating elderly people who are exhibiting symptoms of dementia is understanding the patterns within their activities of daily living (ADL). One class of ADL of importance to both caregivers and doctors is personal hygiene activities within the bathroom, which typically cannot be observed directly for reasons of privacy.
Jianfeng Chen +3 more
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The Journal of the Acoustical Society of America, 1986
Acoustic emission monitoring is a non-destructive testing technique that ects ultra-high frequency sound that stressed metal emits. In straightening a gun tube the workpiece is at first under no stress, is elastically deformed (with total springback when pressure is released), is plastically deformed (with some springback upon release of pressure), or
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Acoustic emission monitoring is a non-destructive testing technique that ects ultra-high frequency sound that stressed metal emits. In straightening a gun tube the workpiece is at first under no stress, is elastically deformed (with total springback when pressure is released), is plastically deformed (with some springback upon release of pressure), or
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Application of acoustic emission to condition monitoring
NDT & E International, 1988With the aim of applying AE technology to condition monitoring, the phenomena producing AE in the materials and acoustic background noise present during plant and structure operation are analyzed. The main characteristics and the needs in performance and reliability of the instrumentation which has to work for a long period, continuous monitoring in
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Monitoring of a heterogeneous reaction by acoustic emission
The Analyst, 2004The feasibility of monitoring the reaction of itaconic acid and 1-butanol by non-invasive acoustic emission measurements has been assessed. A piezoelectric transducer with a resonant mode at 90 kHz was attached to the external wall of a 1 L jacketed glass reactor.
Alison, Nordon +6 more
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Active Acoustic Monitoring of Aquatic Life
2016Active acoustic monitoring (AAM) can be used to study the behavioral response of marine life and to mitigate harm during high-danger anthropogenic activities. This has been done in fish studies for many decades, and there are now case studies in which AAM has been used for marine mammal monitoring as well. This includes monitoring where the ranges, AAM
Peter J, Stein, Patrick, Edson
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2012
Multi-point Acoustic Sensing (MAS) technology makes use of hydrophone sensors placed at discrete distances along pipelines in order to detect third party interference (TPI) and leaks. In fact, any interaction with the pipe generates pressure waves that are guided within the fluid for long distances, carrying information on the source event.
BERNASCONI, GIANCARLO +2 more
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Multi-point Acoustic Sensing (MAS) technology makes use of hydrophone sensors placed at discrete distances along pipelines in order to detect third party interference (TPI) and leaks. In fact, any interaction with the pipe generates pressure waves that are guided within the fluid for long distances, carrying information on the source event.
BERNASCONI, GIANCARLO +2 more
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ACOUSTIC EMISSION MONITORING OF KNOWN FLAWS
NDT & E International, 1992Three are the applications of Acoustic Emission Technique (AET) as a non-destructive test: application to new equipment for qualification, application to installed equipment for requalification and, the most recent one, the monitoring of known flaws. The aim of this last application is to provide informations which may help when deciding about whether ...
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