Microwave Heating Abnormality Detection via Power and Temperature Feedback
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Solution Overview
Problem
Conventional microwave heating methods face challenges in detecting abnormalities, such as thermal runaway, due to the shielded nature of microwave irradiation regions, which makes it difficult to observe and address issues like microwave leakage or unexpected changes in the irradiation target.
Innovation Solution
An information processing apparatus that calculates electric energy and temperature changes during microwave irradiation, using a relational expression to judge whether these parameters fall within a tolerable range, and outputs any abnormalities detected, allowing for timely intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If microwave irradiation is used for rapid internal heating, then heating speed is improved, but detection of abnormalities becomes difficult
Solution Approach 1:
The system implements feedback by continuously monitoring electric power values (incident and reflected waves) and temperatures during microwave irradiation, comparing actual values against expected ranges, and issuing alerts when deviations indicate thermal runaway or other abnormalities. This closed-loop monitoring enables detection of rapid heating anomalies despite the shielded nature of microwave cavities.
2Object-affected harmful factors
If the microwave irradiation region is shielded, then safety is improved, but observation of the irradiation target becomes difficult
Solution Approach 1:
The system uses intermediary measurements of electric power values (incident and reflected microwave powers) and temperature changes as proxies for directly observing the irradiation process. These measurable parameters serve as intermediaries that indicate the state of the shielded irradiation region without requiring direct visual observation, thereby maintaining safety while enabling monitoring.
3Productivity
If thermal runaway occurs during microwave heating, then heating efficiency is improved, but safety deteriorates
Solution Approach 1:
The system applies preliminary anti-action by establishing predetermined safe operating ranges for electric power and temperature before microwave heating begins. During irradiation, the system continuously checks whether measurements remain within these pre-established boundaries and takes corrective action (stopping heating, issuing alerts) before thermal runaway can cause safety incidents, thus preventing rather than merely responding to dangerous conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables effective detection and handling of abnormalities in microwave irradiation processes, ensuring safe and controlled heating operations by utilizing easily accessible electric power and temperature data.
Implementation Method 1
heating using microwaves is characterized in that it is internal heating that causes a material itself to generate heat
Implementation Method 2
an electric energy calculating unit that calculates an electric energy supplied during a microwave irradiation time, using the supplied electric power value accepted by the supplied electric power value accepting unit
Implementation Method 3
a temperature change calculating unit that calculates a temperature change during the microwave irradiation time, using the temperature accepted by the temperature accepting unit
Data Source
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AI summary
Provided is an information processing apparatus that can detect occurrence of an abnormality in a microwave irradiation apparatus, including: a supplied electric power value accepting unit 13 that accepts a supplied electric power value, which is a difference between an electric power value of microwaves incident on a microwave irradiation apparatus 2 and an electric power value of microwaves reflected by the microwave irradiation apparatus 2; a temperature accepting unit 15 that accepts a temperature of a content; an electric energy calculating unit 14 that calculates an electric energy corresponding to a microwave irradiation time, using the supplied electric power value; a temperature change calculating unit 16 that calculates a temperature change corresponding to the microwave irradiation time, using the accepted temperature; a judging unit 20 that, using the electric energy, the temperature change, and a relational expression for associating the electric energy and the temperature change, judges whether or not the relational expression is satisfied within a tolerable range by the electric energy and the temperature change; and an output unit 21 that performs output regarding occurrence of an abnormality, in a case where it is judged that the relational expression is not satisfied within the tolerable range by the electric energy and the temperature change.