Microwave Detection Antenna Correlation Circuit
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Solution Overview
Problem
Existing methods for detecting the operation status of microwave ovens rely on radio-controlled plugs and sockets, which may not be efficient or reliable, and do not utilize the microwave radiation leakage for detection.
Innovation Solution
An apparatus and method that utilize an antenna to send and receive electromagnetic waves, detect microwave signals, and generate an indication signal based on the correlation with a stored signature, with an FM demodulator to correct the center frequency for improved detection, leveraging the radiation leakage of microwave ovens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio-controlled plugs and sockets are used to detect microwave oven operation, then power consumption information can be obtained, but the detection reliability and efficiency are insufficient
Solution Approach 1:
The patent converts the harmful microwave radiation leakage from the microwave oven into a useful detection signal. By using an antenna to receive the naturally emitted microwave signals during operation, the system transforms a potential hazard into a reliable detection mechanism, eliminating the need for additional power consumption monitoring devices.
Solution Approach 2:
The patent replaces the mechanical/electrical radio-controlled plug and socket system with an electromagnetic field-based detection system. Instead of monitoring power draw through electrical connections, the system uses an antenna and signal processing circuitry to detect microwave radiation, simplifying the physical connection requirements and improving reliability.
2Measurement precision
If microwave radiation leakage is utilized for detection, then detection accuracy improves, but signal processing complexity increases
Solution Approach 1:
The patent stores the characteristic signature of microwave signals in advance during system initialization or calibration phases. This pre-stored reference data enables rapid comparison and identification during actual detection, reducing the computational complexity of real-time signal processing while maintaining high detection accuracy.
Solution Approach 2:
The patent creates a simplified representation (copy) of the microwave signal characteristics by storing its signature. Instead of analyzing the complete complex signal waveform in real-time, the system compares received signals against this stored signature, significantly reducing processing complexity while preserving detection precision.
3Reliability
If correlation-based detection with stored signatures is implemented, then detection reliability improves, but processing time increases
Solution Approach 1:
The patent implements a threshold-based correlation detection that stops processing once a predetermined confidence level is achieved. By setting appropriate correlation thresholds, the system performs sufficient comparison to ensure reliable detection without unnecessarily extending processing time, balancing accuracy and speed.
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 approach allows for accurate detection of microwave oven operation by correlating received signals with stored signatures, providing a reliable and efficient method to determine if a microwave oven is on or off, enhancing energy management and user preference insights.
Implementation Method 1
an antenna for sending and receiving electromagnetic waves
Implementation Method 2
an FM demodulator... generating an indication signal if the correlation between the received and the stored microwave signals exceeds a predetermined threshold value
Data Source
AI summary
An apparatus for detecting microwave signals is suggested. The apparatus comprises an antenna for sending and receiving electromagnetic waves a circuit for detecting microwave signals and the signalization stage for generating an indication signal. In addition to that a method for detecting the presence of microwave signals is proposed.