Clapping Sound Control Device Using Dynamic Gate Timing
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Solution Overview
Problem
Existing methods for controlling electronic appliances using clapping sounds face challenges in accurately recognizing intervals between clapping sounds, leading to erroneous operations, and require pre-registration of clapping patterns.
Innovation Solution
A control device comprising a sound detector, edge signal extractor, edge pulse generator, and judgment processing circuit that generates gates with specific time widths to detect clapping sounds, allowing for correct recognition of clapping patterns without prior registration, and reduces erroneous operations by using a band division processing section to distinguish clapping sounds from noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of clapping sounds is increased to improve resistance to surrounding noise and unexpectedly emitted sound, then the reliability of control is improved, but the measurement precision of clapping sound recognition deteriorates because intervals between clapping sounds depend on user habits
Solution Approach 1:
The patent applies dynamics by making the detection gate time width variable rather than fixed. The gate time width is dynamically adjusted based on the interval between the first and second clapping sounds. Specifically, the gate time width is set to a value that is longer than the interval between clapping sounds, allowing the system to adapt to different user clapping rhythms. This resolves the contradiction by enabling reliable detection of multiple clapping sounds while maintaining accurate recognition of the total number of claps, regardless of user-specific timing patterns.
2Device complexity
If a fixed gate time width is used to detect clapping sounds, then the device complexity is reduced, but the measurement precision of clapping sound detection deteriorates when clapping intervals vary among users
Solution Approach 1:
The patent implements dynamics by calculating the gate time width based on the actual interval between the first and second clapping sounds. The control device measures the time interval between detected clapping sounds and sets the gate time width to be longer than this measured interval. This dynamic adjustment ensures accurate detection of all clapping sounds in the sequence without requiring complex pre-programmed time tables, thus maintaining relatively simple device structure while achieving high detection precision for varying user patterns.
Solution Approach 2:
The patent applies parameter changes by adjusting the gate time width parameter based on detected clapping intervals. Instead of using a fixed time parameter, the system dynamically changes the gate duration to match the user's clapping rhythm. The gate time width is set to a value that accommodates the specific user's clapping speed, ensuring that all clapping sounds are captured within the detection window while maintaining a relatively simple implementation approach.
3Measurement precision
If clapping patterns are registered beforehand for each user to improve measurement precision, then the recognition accuracy is improved, but the ease of operation deteriorates because users must perform registration procedures
Solution Approach 1:
The patent implements self-service by enabling the system to automatically adapt to each user's clapping pattern without requiring manual registration. When a user claps for the first time, the device measures the interval between claps and automatically sets the appropriate gate time width for that user. This allows the system to achieve high recognition accuracy tailored to each user's rhythm while maintaining ease of operation, as users simply need to clap without any prior setup or registration procedures.
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 effectively reduces erroneous operations by accurately recognizing clapping patterns and allowing control of electronic appliances without prior registration, improving resistance to noise and varying clapping intervals.
Implementation Method 1
a sound detector (101) which detects a series of sound waves generated at predetermined time intervals for control of the electronic appliance to perform sound-electricity conversion
Data Source
AI summary
An electronic appliance includes a microphone which detects a clapping sound, an edge signal extractor, an edge pulse generator and a judgment processing circuit. The judgment processing circuit generates a first gate having a first time width to detect whether or not a second clapping sound has been generated after elapse of a first predetermined time from a first time when the microphone detects a first clapping sound and the edge pulse generator generates the first edge pulse corresponding to the first clapping sound. Subsequently, the judgment processing circuit generates a second gate having a second time width to detect whether or not a third clapping sound has been generated after elapse of a second predetermined time from a second time when the edge pulse generator generates the second edge pulse corresponding to the second clapping sound.