Microwave Popcorn End Detection Using Sound and Humidity
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Solution Overview
Problem
Existing popcorn popping methods in microwaves lack effective end status indicators to determine the optimal completion of the popping cycle, leading to potential overcooking or undercooking of popcorn kernels.
Innovation Solution
The method employs a microwave with a microphone sensor to detect popping sounds and a humidity sensor to determine when to stop the energy source, using predetermined sound and humidity indicators to ensure perfect popping, such as reaching a certain number of popping sounds per interval, total sounds, or humidity levels, thereby preventing burning or undercooking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the microwave operates for a fixed predetermined time, then the device complexity is low, but the manufacturing precision of popcorn popping is poor
Solution Approach 1:
The patent implements feedback control by detecting popping sounds during the microwave operation and using this information to determine when to terminate the popping cycle. The system continuously monitors the acoustic environment and compares the detected popping rate against threshold values to dynamically adjust the cooking process, ensuring precise completion detection without requiring complex pre-programmed timing sequences
Solution Approach 2:
The patent replaces mechanical or electronic timing mechanisms with an acoustic detection system. Instead of relying on predetermined time intervals or complex sensor arrays, the system uses a simple microphone to detect popping sounds and processes this acoustic information to control the popping process, achieving high precision with minimal device complexity
2Reliability
If the microwave stops operating early based on insufficient indicators, then energy consumption is reduced, but the reliability of popcorn cooking quality deteriorates
Solution Approach 1:
The system uses feedback from acoustic detection to determine the optimal termination point. By continuously monitoring popping sounds and comparing against established thresholds, the system ensures that the popcorn is cooked to the precise point of completion, maintaining consistent quality while avoiding unnecessary energy consumption from overcooking
Solution Approach 2:
The patent employs a threshold-based detection system that allows for slight variations in the popping process. The system continues operation until the popping rate falls below a predetermined threshold, ensuring that even if the exact completion moment varies slightly, the final product quality remains consistent and reliable
3Measurement precision
If multiple sensors are used to detect popping status, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The patent replaces complex multi-sensor systems with a simple acoustic detection approach. By using a microphone to detect popping sounds, the system achieves high measurement precision for determining popcorn completion status without requiring multiple physical sensors, thereby maintaining low device complexity while improving detection accuracy
Solution Approach 2:
The acoustic detection system serves multiple functions: it detects the start of popping, monitors the popping rate throughout the cycle, and determines the end point. This single detection mechanism provides comprehensive popping status information, eliminating the need for separate sensors for different detection purposes
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 ensures that popcorn is cooked to the desired state by accurately determining the end of the popping cycle, avoiding overcooking or undercooking, and providing consistent results.
Implementation Method 1
The popping sounds generated when the popcorn kernels are popped are detected
Implementation Method 2
a humidity sensor to detect a humidity level within the cooking chamber
Implementation Method 3
an energy source which provides energy to the cooking chamber
Data Source
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AI summary
A method of popping popcorn in a microwave (10) having a cooking chamber (12), an energy source (14) which provides energy (42) to the cooking chamber (12), a humidity sensor (60), and a microphone sensor (16), includes the steps of placing a plurality of popcorn kernels (40) in the cooking chamber (12). The energy source (14) is operated during a popcorn popping cycle. Popping sounds generated when the popcorn kernels (40) are popped are detected, as is the humidity level in the cooking chamber (12). The energy source (14) is directed to stop operating when the popping sound and the humidity level satisfy one or more end status indicators. The current disclosure also includes a microwave (10) for carrying out the above described process.