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Title: Acoustic emission feedback control for control of boiling in a microwave oven

This patent describes an acoustic emission based feedback system for controlling the boiling level of a liquid medium in a microwave oven. The acoustic emissions from the medium correlated with surface boiling is used to generate a feedback control signal proportional to the level of boiling of the medium. This signal is applied to a power controller to automatically and continuously vary the power applied to the oven to control the boiling at a selected level.
Authors:
Publication Date:
OSTI Identifier:
6075386
Report Number(s):
US 4996403; A
PPN: US 7-474906
Resource Type:
Patent
Resource Relation:
Patent File Date: 5 Feb 1990
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; 47 OTHER INSTRUMENTATION; CONTROL SYSTEMS; AUTOMATION; LIQUIDS; BOILING DETECTION; MICROWAVE OVENS; ACOUSTIC EMISSION TESTING; DESIGN; HEAT TRANSFER; PLANNING; POWER SYSTEMS; ACOUSTIC TESTING; APPLIANCES; DETECTION; ENERGY TRANSFER; FLUIDS; MATERIALS TESTING; NONDESTRUCTIVE TESTING; OVENS; TESTING 240100* -- Power Systems-- (1990-); 440800 -- Miscellaneous Instrumentation-- (1990-)