Infrared Sensor Aperture for Induction Cooking Temperature Control
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Solution Overview
Problem
Induction cooking systems face challenges in accurately measuring the temperature of vessels without direct contact, particularly due to interference from the base surface blocking infrared radiation and varying material properties affecting radiation transmission.
Innovation Solution
An induction cooking system incorporating an infrared temperature sensor positioned within an aperture adjacent to a transparent window in the base surface, coupled with an electronic controller that compensates for material-related radiation losses to provide accurate temperature measurements, allowing for precise temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an infrared temperature sensor is used to measure vessel temperature without direct contact, then measurement safety and ease of operation are improved, but measurement precision deteriorates due to base surface blocking infrared radiation
Solution Approach 1:
A transparent window is introduced as an intermediary component between the infrared temperature sensor and the vessel. This window allows infrared radiation to pass through from the vessel to the sensor while maintaining the physical barrier of the base surface, thus enabling contactless measurement while preserving measurement accuracy.
Solution Approach 2:
The infrared sensor is positioned in a different spatial dimension (below the base surface) relative to the vessel, with the window providing a transmission path through the base surface. This dimensional arrangement allows the sensor to detect infrared radiation without being in direct contact with the vessel or obstructed by the base surface material.
2Measurement precision
If a transparent window is added to the base surface to allow infrared transmission, then temperature measurement capability is improved, but device complexity increases
Solution Approach 1:
The transparent window serves multiple functions: it maintains the structural integrity of the base surface, provides a barrier between the sensor and cooking environment, and simultaneously allows infrared radiation transmission. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The base surface is modified locally at the window position with infrared-transmissive material properties, while the rest of the base surface maintains its original structural and material characteristics. This localized modification minimizes overall device complexity while enabling the required measurement function.
3Measurement precision
If compensation for material-related radiation losses is implemented, then temperature measurement accuracy is improved, but computational complexity increases
Solution Approach 1:
The electronic controller applies parameter changes to the raw temperature measurement by incorporating compensation factors that account for the window material's infrared transmission properties. This mathematical adjustment corrects for radiation losses without requiring complex hardware modifications.
Solution Approach 2:
The system implements a feedback mechanism where the electronic controller continuously processes the raw temperature signal, applies material-specific compensation algorithms, and outputs corrected temperature measurements. This feedback loop ensures accurate temperature readings while maintaining manageable computational complexity through established compensation models.
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 accurate temperature measurement and control of vessels without direct contact, improving the efficiency and accuracy of the cooking process by accounting for material-specific radiation transmission properties.
Implementation Method 1
an infrared temperature sensor positioned within an aperture adjacent to a transparent window in the base surface
Implementation Method 2
compensates for material-related radiation losses
Data Source
AI summary
An induction cooking system. The induction cooking system includes a base, one or more side walls, an induction coil, and an infrared temperature sensor. The base includes a base surface associated therewith. The base surface includes a window. The window is disposed within the base surface. The one or more side walls define a well above the base surface. The well is configured to receive a vessel disposed above the base surface. The induction coil is disposed within the base. The induction coil defines a first surface that is disposed below the base surface. The induction coil also defines a second surface that is disposed opposite from the first surface. The induction coil further defines an aperture disposed adjacent to the window and extending from a first surface toward a second surface of the induction coil. The infrared temperature sensor is disposed adjacent to the window and within the aperture.