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An apparatus for on‐line measuring electric field intensity during microwave heating: a theoretical consideration
Author(s) -
Fu YiChung,
Yang Binghuei B.,
Chen ChungJen,
Sheen ShiowShuh
Publication year - 2005
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.2005.00994.x
Subject(s) - electric field , intensity (physics) , electromagnetic field , microwave , field (mathematics) , dielectric , line (geometry) , computational physics , temperature measurement , optics , materials science , dissipation , mechanics , acoustics , physics , optoelectronics , thermodynamics , mathematics , geometry , quantum mechanics , pure mathematics
Summary A simple minimally perturbing method and an apparatus for on‐line measuring the electric field ( E ‐field) intensity at a particular small region, or a localized point in an electromagnetic field is described. The theoretical considerations and methodology for on‐line measuring electric field intensity are presented. They are based on measurement of the differential heating of the temperature rise using a fiberoptic temperature sensor at which a selected droplet of dielectric medium is dissipated in an electromagnetic field. The performance of the apparatus was examined and verified from power dissipation calculations of the water load. There was good agreement between the experimental and predicted value of average water temperature based on electric field on‐line measurement.