Infra-Through Ultrasonic Piezoelectric Acoustic Vector Sensor Particle Rejection System
Joint Authors
Barrett, Ronald M.
Cravens, Scott E.
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-03-29
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
Sensor elements which employ fine filaments are often vulnerable to particulate fouling when used in certain operational field conditions.
Depending on the size, attraction level, thermal and electrical conduction, and charge accumulation properties of the particles, erroneous readings can be easily generated in such “dirty” environments.
This paper describes the design, development, and testing of an ultrasonic system which dynamically rejects highly tenacious electrostatically charged particles of a wide variety of sizes and even water.
The paper starts with a brief introduction to the field of acoustic vector sensing, outlining its outstanding characteristics and history.
Operational challenges including a statistical analysis of typical Middle-Eastern wind-blown desert sand and charge density are laid out.
Several representative subscale hot-wire filaments were fouled with calibrated dust representing desert sand.
The fouled elements were then exposed to airflows of 13 ft/s (4 m/s) and showed highly erratic shifted conduction levels with respect to baseline (clean) levels.
An ultrasonic cleaning system was designed specifically resonate the filament and cantilever so as to mechanically reject foulants.
When operated at resonance, the ultrasonic cleaning system showed 98.6% particulate rejection levels and associated restoration of uncorrupted filament resistance levels to within 2% of baseline resistance measurements.
American Psychological Association (APA)
Cravens, Scott E.& Barrett, Ronald M.. 2012. Infra-Through Ultrasonic Piezoelectric Acoustic Vector Sensor Particle Rejection System. Smart Materials Research،Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-465390
Modern Language Association (MLA)
Cravens, Scott E.& Barrett, Ronald M.. Infra-Through Ultrasonic Piezoelectric Acoustic Vector Sensor Particle Rejection System. Smart Materials Research No. 2012 (2012), pp.1-6.
https://search.emarefa.net/detail/BIM-465390
American Medical Association (AMA)
Cravens, Scott E.& Barrett, Ronald M.. Infra-Through Ultrasonic Piezoelectric Acoustic Vector Sensor Particle Rejection System. Smart Materials Research. 2012. Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-465390
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-465390