Magnetic Field-Powered Temperature Sensing for Electromagnetic Devices
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Solution Overview
Problem
Current temperature measurement methods for electromagnetic devices, such as induction cooktops, face issues with latency and accuracy due to heat conduction and radiation, and the use of batteries poses safety and environmental concerns.
Innovation Solution
A sensing device that utilizes a power module to generate a supply voltage based on the magnetic field of an electromagnetic device, eliminating the need for batteries and directly powering the sensing module and processing module, thereby enhancing accuracy and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is disposed below the panel for detecting temperature through heat radiation, then the temperature can be measured indirectly, but the measurement accuracy deteriorates due to heat conduction latency and poor heat transfer effect
Solution Approach 1:
The patent introduces a magnetic field as an intermediary medium for energy transfer. The electromagnetic device generates a magnetic field that directly induces current in the sensing device, bypassing the need for heat conduction through the panel. This magnetic field intermediary enables direct coupling between the electromagnetic device and the sensing device, eliminating the thermal latency issue.
Solution Approach 2:
The patent replaces the thermal conduction mechanism with an electromagnetic induction mechanism. Instead of relying on heat transfer through the panel (thermal field), the system uses magnetic field induction to transfer energy and activate the sensing device. This substitution of physical fields eliminates the inherent latency of thermal conduction.
2Ease of operation
If the sensing device is powered by connection with the electromagnetic device, then power supply is convenient, but the measurement accuracy deteriorates due to heat conduction latency
Solution Approach 1:
The magnetic field serves as an intermediary that simultaneously provides both power supply and triggers the sensing operation. The electromagnetic device's magnetic field directly induces current in the sensing device's coil, providing power without requiring physical electrical connections. This intermediary mechanism resolves the contradiction by enabling both convenient power supply and accurate measurement through the same magnetic coupling pathway.
3Adaptability or versatility
If batteries are used to power the sensing device, then the device can operate independently, but safety issues arise due to toxic metal compositions and high temperature intolerance
Solution Approach 1:
The sensing device harvests its own operating energy from the magnetic field generated by the electromagnetic device during normal operation. The coil in the sensing device directly converts the magnetic field energy into electrical current, enabling the device to power itself without external batteries. This self-service mechanism eliminates toxic batteries while maintaining independent operation capability.
Solution Approach 2:
The patent converts the electromagnetic device's magnetic field, which is already present during operation, into useful electrical energy for powering the sensing device. By utilizing the existing magnetic field that is necessary for the electromagnetic device's function, the system transforms what could be considered energy loss into a beneficial power source, eliminating the need for harmful batteries.
4Measurement precision
If the sensing device directly contacts with the food or cooking medium, then temperature can be measured directly, but food pollution occurs due to battery compositions
Solution Approach 1:
The sensing device uses the magnetic field from the electromagnetic device to generate its own power, eliminating the need for batteries. This self-powering capability allows the sensing device to be made of food-safe materials without compromising operational independence, thus enabling direct contact with food for accurate measurement without pollution risk.
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
This solution provides accurate and reliable temperature measurement without battery-related safety issues, reduces manufacturing costs, and expands the application scope of sensing devices, ensuring electromagnetic compatibility and user safety.
Implementation Method 1
a power module coupled to the sensing module and the first processing module. The power module is configured to produce a supply voltage based on a magnetic field generated by an electromagnetic device
Data Source
AI summary
A sensing device includes a sensing module configured to obtain a measurement data of an object to be measured, a first processing module coupled to the sensing module and configured to receive the measurement data of the object to be measured from the sensing module, and a power module coupled to the sensing module and the first processing module. The power module is configured to produce a supply voltage based on a magnetic field generated by an electromagnetic device to power the sensing module and the first processing module.