Electric Range Container Identity Detection via Loop Coil Damping
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Solution Overview
Problem
Full-free electric ranges face issues with automatic cooking operations being canceled or errors occurring when the position of a container is changed, as they struggle to determine the identity of the container at its new location.
Innovation Solution
A method using a combination of loop coils and temperature sensors to sense and identify containers based on damping vibrations, the number of loop coils sensing the container, and temperature measurements, ensuring continuity of cooking operations by determining container identity before and after position changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the position of a container is changed during automatic cooking operation in a full-free electric range, then user convenience is improved, but the automatic cooking operation may be canceled or an error may occur
Solution Approach 1:
The system continuously monitors container position using loop coils and compares it with the initial position. When a position change is detected, the controller determines whether the container is the same by analyzing damping vibration characteristics. This feedback mechanism allows the system to adapt to position changes while maintaining cooking operation stability, resolving the contradiction between user convenience and operational reliability.
Solution Approach 2:
The system uses damping vibration parameters (frequency, decay rate) as unique identifiers for each container. By monitoring changes in these parameters when a container is moved, the system can determine if the same container has been relocated or if a different container has been placed. This parameter-based identification allows the cooking operation to continue seamlessly, maintaining reliability while permitting position changes for user convenience.
2Adaptability or versatility
If the position of a container is changed during automatic cooking operation, then freedom of movement is improved, but the system cannot determine the identity of the container at the new location
Solution Approach 1:
The system creates a signature or fingerprint of each container based on its damping vibration characteristics when first placed on the cooktop. This signature is stored in memory. When the container is moved to a new position, the system compares the new vibration characteristics with the stored signature to determine if it is the same container. This copying approach preserves container identity information across position changes, enabling both position flexibility and identity recognition.
Solution Approach 2:
The system utilizes the natural mechanical vibration and damping characteristics of containers when they are subjected to the electromagnetic field of the loop coils. Each container exhibits unique vibration patterns based on its material properties, shape, and mass distribution. By analyzing these vibration characteristics, the system can identify containers without physical tags or markers, maintaining adaptability while preventing loss of identity information.
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 the determination of container identity when its position is changed, allowing for seamless continuation of automatic cooking operations without errors, enhancing user convenience.
Implementation Method 1
sensing a first container on the electric range by using at least one loop coil
Implementation Method 2
a first similarity determined based on damping vibration in each of at least one loop coil having sensed the first container and damping vibration in each of at least one loop coil having sensed the second container
Implementation Method 3
a high-frequency voltage of a certain magnitude is applied to a working coil, generating a magnetic field around the working coil. Magnetic lines in the generated induction magnetic field generate an eddy current inside the burner, and the burner is heated by the eddy current
Implementation Method 4
Magnetic lines in the generated induction magnetic field generate an eddy current inside the burner
Implementation Method 5
when a certain power is applied to a heating coil inside the burner, the heating coil emits high-temperature radiant heat by generating heat on its own
Data Source
AI summary
A method includes: sensing a first container on an electric range by using at least one loop coil; sensing removal of the first container by using at least one of working coils; sensing a second container on the electric range by using at least one of loop coils; and determining an identity of the first container and the second container. The determining the identity is on the basis of at least one of: a first similarity determined based on damping vibration in each of at least one loop coil having sensed the first container and damping vibration in each of at least one loop coil having sensed the second container; and a second similarity determined based on the number of loop coils having sensed the first container and the number of loop coils having sensed the second container.