SAW Sensor Wireless Temperature Monitoring for Cooking Hobs
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Solution Overview
Problem
Existing cooking hobs lack an effective and integrated solution for accurately monitoring the temperature of cookware, which is crucial for controlling the cooking process, as current methods either rely on external sensors or integrated sensors with limited flexibility and accuracy.
Innovation Solution
A temperature information assembly for cooking hobs that includes a surface acoustic wave (SAW) temperature sensor and antenna system, where the SAW temperature sensor is attached to or integrated within the cooking pot and wirelessly connected to a reader antenna on the hob, allowing for precise temperature monitoring and control of the cooking process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is placed below the glass ceramic panel to detect cookware temperature, then the temperature can be monitored, but the measurement precision and reliability are insufficient
Solution Approach 1:
The patent introduces a SAW temperature sensor as an intermediary element that is attached to the cookware itself rather than placing sensors in the hob. This mediator (SAW sensor on cookware) enables accurate temperature measurement without requiring complex sensor arrangements in the hob structure, thus improving measurement precision while avoiding increased device complexity.
Solution Approach 2:
The patent replaces mechanical/contact-based temperature sensing (physical sensors in the hob contacting cookware) with wireless SAW (Surface Acoustic Wave) technology. This substitution eliminates the need for physical connection between the hob and temperature sensing, improving measurement accuracy while simplifying the overall system architecture.
2Reliability
If external sensors are used to detect cookware temperature, then the cooking process can be monitored, but the integration and reliability are limited
Solution Approach 1:
The SAW temperature sensor acts as a reliable intermediary attached directly to the cookware, providing consistent and accurate temperature data. This direct attachment improves reliability compared to external sensing methods, while the wireless communication maintains attachment flexibility across different cookware types.
Solution Approach 2:
The patent creates a universal temperature monitoring solution where the SAW sensor can be attached to various types of cookware (pots, pans, etc.) regardless of material or design. This universal approach enhances both reliability through direct contact and adaptability across different cooking scenarios.
3Loss of information
If wireless SAW temperature sensing is implemented, then temperature data can be obtained, but the system complexity increases
Solution Approach 1:
The patent replaces complex wired temperature information transmission with wireless SAW technology. This substitution eliminates physical connections while maintaining reliable temperature data transmission, reducing mechanical complexity while preserving information flow.
Solution Approach 2:
The SAW temperature sensor is self-contained and autonomously transmits temperature data wirelessly to the hob control unit. This self-service capability eliminates the need for complex external wiring and connection management, reducing system complexity while ensuring continuous temperature information transmission.
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 real-time temperature data from the cooking pot to the hob, enabling precise control of the cooking process, improving cooking efficiency and flexibility by allowing the reader antenna to be placed optimally relative to the cooking zones, regardless of the hob's configuration, such as glass ceramic, induction, or gas heating elements.
Implementation Method 1
at least one SAW (surface acoustic wave) temperature sensor permanently or removably attached or attachable at or in a cooking pot
Data Source
AI summary
The present invention relates to a temperature information assembly for a cooking hob (18). The temperature information assembly comprises at least one SAW (surface acoustic wave) temperature sensor (10) permanently or removably attached or attachable at or in a cooking pot (24), at least one sensor antenna (12) permanently or removably attached or attachable at the cooking pot (24) and electrically connected to the SAW temperature sensor (10), at least one reader (14) permanently or removably attached or attachable in or on the cooking hob (18), and at least one reader antenna (16) permanently or removably attached or attachable in or on the cooking hob (18) and electrically connected to the reader (14). The SAW temperature sensor (10) is wireless connected or connectable to the reader (14) via the sensor antenna (12) and the reader antenna (16). The reader (14) is electrically connected or connectable to a control unit (22) of the cooking hob (18) in order to control the cooking process. Further, the present invention relates to a cooking hob (18) with the temperature information assembly. Moreover, the present invention relates to a cooking pot (24) with the SAW temperature sensor (10) and the sensor antenna (12) or prepared for receiving said SAW temperature sensor (10) and sensor antenna (12).