Flow control apparatus and flow control generation device thereof for generating DC control signal based on audio signal
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Solution Overview
Problem
Conventional flow controllers fail to accurately control the flame of fire dances to match the rhythm of music composed of various instruments and human voice, as they do not effectively translate volume changes into corresponding flame adjustments.
Innovation Solution
A flow control signal generation device that converts audio signals into direct current (DC) control signals, using a module comprising an audio receiving module, filter rectifier module, and microprocessor to adjust the flow of flammable gas through a proportional valve, ensuring the flame responds to the music's rhythm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional flow controller controls flame based on audio volume, then flame changes with volume, but flame cannot show rhythm change when music is composed of various instruments and human voice
Solution Approach 1:
The audio signal is segmented into multiple frequency bands using a polyphase filter bank, with each band processed independently to detect rhythm patterns. This segmentation allows the system to identify rhythmic components even when overall volume remains constant due to mixed instruments and vocals.
Solution Approach 2:
A DC control signal is introduced as an intermediary between the audio signal and the flame control mechanism. This DC signal serves as a mediator that translates complex audio rhythm patterns into simplified control commands for the proportional valve, enabling rhythm-based flame modulation without directly processing the complex audio waveform.
2Ease of operation
If flow controller uses simple volume-based control, then device complexity is low, but cannot deliver rhythm of music when volume is kept high by mixing various instruments
Solution Approach 1:
The system dynamically adjusts the DC control signal based on real-time rhythm detection from the audio signal. The proportional valve opening ratio is dynamically modulated according to detected rhythm patterns, allowing the flame to respond dynamically to musical rhythm rather than static volume levels.
Solution Approach 2:
The conventional mechanical volume-based control system is replaced with an electronic signal processing system that uses digital filtering, rectification, and rhythm detection algorithms. This substitution enables sophisticated rhythm analysis while maintaining ease of operation through automated electronic control.
3Measurement precision
If conventional controller keeps large flame due to high volume from mixed audio, then volume control works, but rhythm change is not reflected in flame
Solution Approach 1:
The system changes the control parameter from overall audio volume to rhythm-specific frequency band analysis. By monitoring parameter changes in the DC control signal based on rhythm detection across multiple frequency bands, the system can modulate flame size according to rhythm patterns while maintaining appropriate gas flow levels.
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 device generates a DC control signal based on audio signals, allowing the proportional valve to adjust the gas flow, thereby synchronizing the flame with the music's rhythm, enhancing the visual representation of the music's rhythm in fire dance performances.
Implementation Method 1
The filter rectifier module is electrically connected to the audio receiving module, for filtering the audio signal to generate at least one DC audio signal
Implementation Method 2
The first rectifier filter is electrically connected to the second low-pass filter, for converting the second low frequency-band signal into a DC control signal
Implementation Method 3
transmitting the DC control signal to a proportional valve to have the proportional valve adjusting opening ratio of the proportional valve based on the DC control signal
Data Source
AI summary
A flow control apparatus includes a flow control signal generation device for generating a DC control signal based on an audio signal and at least one proportional valve. The flow control signal generation device includes an audio receiving module, a filter rectifier module, a microprocessor and a proportional valve control signal generation module. The filter rectifier module generates at least one DC audio signal by filtering the audio signal provided by the audio receiving module. The microprocessor generates a plurality of period attenuated values based on the DC audio signal. The proportional valve control signal generation module filters the audio signal, attenuates the signal based on the period attenuated values, and then performs filtering and rectification processing to generate the DC control signal, such that the proportional valve may control the opening ratio of the proportional valve based on the DC control signal.