Wireless power transmission device and control method thereof
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Solution Overview
Problem
Existing wireless power transmission devices struggle to accurately indicate the heating level and temperature of cooking appliances, making it difficult for users to determine the actual heating intensity and temperature of the cooking appliance, especially when the device is not in operation.
Innovation Solution
A wireless power transmission device equipped with a working coil, a sensing coil, a light source driver, and a processor that controls the transmission of power and adjusts the light emission intensity, color, or form based on the induced power, allowing for visual feedback on the heating status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a wireless power transmission device uses existing technology for displaying operation status, then the device can indicate whether it is operating and its operating strength, but it cannot accurately display the degree to which a to-be-heated object is actually heated
Solution Approach 1:
The patent introduces a feedback mechanism where the sensing coil detects the magnetic field generated by the to-be-heated object during heating, and this detected information is fed back to control the light source. The light source then visually indicates the heating level based on the detected magnetic field strength, providing real-time feedback on the actual heating status to the user.
Solution Approach 2:
The patent uses a sensing coil as an intermediary element that indirectly detects the heating status of the to-be-heated object. Instead of directly measuring temperature, the sensing coil detects the magnetic field generated by the object during induction heating, which serves as a proxy indicator of the heating level. This intermediary approach enables accurate heating status detection without direct contact with the heated object.
2Use of energy by stationary object
If a wireless power transmission device does not perform a heating operation, then energy consumption is reduced, but it becomes difficult to inform users about whether a to-be-heated object is in a high temperature state
Solution Approach 1:
The light source continues to provide visual feedback even when the wireless power transmission device is not actively heating. By detecting the magnetic field signature of the to-be-heated object using the sensing coil, the system can indicate whether the object is in a high-temperature state, providing continuous temperature status information without requiring active heating operation.
3Loss of information
If a sensing coil is added to detect heating status, then visual feedback on heating intensity is achieved, but the device complexity increases
Solution Approach 1:
The sensing coil performs multiple functions: it detects the magnetic field generated by the to-be-heated object during heating, determines the heating level based on the detected magnetic field strength, and controls the light source to provide visual feedback. This multi-functional design reduces the need for separate components and simplifies the overall system architecture.
Solution Approach 2:
The patent combines the sensing function and the visual indication function into an integrated system. The sensing coil's detection output is directly used to control the light source, merging the detection and indication processes into a unified mechanism that reduces system complexity while providing accurate heating status 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
The solution provides clear visual feedback on the heating intensity and temperature of the cooking appliance through adjustable light emission, enabling users to easily monitor and control the cooking process without affecting the power transmission efficiency.
Implementation Method 1
wireless power transmission device and control method thereof... wireless power transmitter including a working coil and configured to wirelessly transmit power to a cooking appliance
Implementation Method 2
a sensing coil disposed to surround an outer side edge of the working coil... control the light source driver to measure second power induced in the sensing coil
Data Source
AI summary
A wireless power transmission device and a control method thereof are provided. The wireless power transmission device includes a wireless power transmitter, a communication interface, a sensing coil, a light source driver, a light source, and at least one processor. The at least one processor is configured to control the wireless power transmitter to transmit first power supplied by the working coil to the cooking appliance, control the light source driver to measure second power induced in the sensing coil when the first power is transmitted, and control the light source driver to set at least one of a light emission intensity of the light source, a light emission color of the light source, or a light emission form of the light source, based on the amount of the second power.