Low-Frequency Acoustic Wave Generator for Pipeline Blockage Detection
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Solution Overview
Problem
Current pipeline blockage detection methods face challenges in transmitting low-frequency acoustic waves into high-pressure pipelines due to pressure differences and noise interference, limiting the precision and distance of detection.
Innovation Solution
A low-frequency acoustic wave generating device with a sealing shell and a low-frequency electroacoustic transducer, connected to a signal generator, which creates a sealed pressure environment to transmit low-frequency acoustic waves into pipelines, allowing for adjustable waveforms and improved noise resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a general loudspeaker is directly connected to the high-pressure pipeline to transmit acoustic waves, then the acoustic wave transmission function is achieved, but the pressure difference damages the loudspeaker
Solution Approach 1:
The device divides the system into two separate pressure zones: the loudspeaker remains in the atmospheric pressure environment inside the sealing shell, while the pipeline operates in the high-pressure environment. The connecting head with acoustic wave transmission holes serves as an interface between these two zones, allowing acoustic wave transmission without direct pressure exposure to the loudspeaker.
Solution Approach 2:
The connecting head acts as an intermediary component that transmits acoustic waves from the atmospheric pressure environment to the high-pressure pipeline environment. The acoustic wave transmission holes in the connecting head allow the acoustic waves generated by the loudspeaker to pass through into the pipeline without exposing the loudspeaker to high pressure.
2Ease of operation
If negative pressure waves are generated by releasing air through an electromagnetic valve, then acoustic wave transmission into the pipeline is achieved, but the wave characteristics are difficult to control
Solution Approach 1:
The invention replaces the mechanical method of generating acoustic waves (releasing air through an electromagnetic valve) with an electroacoustic transducer (loudspeaker) that can be electrically controlled. This substitution allows for precise control of the acoustic wave characteristics through electrical signals while maintaining the capability to transmit acoustic waves into the high-pressure pipeline environment.
3Length of stationary object
If the detection distance is increased, then more pipeline coverage is achieved, but the acoustic signal attenuation increases
Solution Approach 1:
The invention changes the frequency parameter of the acoustic waves by using a loudspeaker capable of generating low-frequency acoustic waves. Low-frequency waves experience less attenuation in the pipeline environment, enabling the acoustic signals to propagate over longer distances and thus increasing the detection range while maintaining signal quality.
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
Enables precise and long-distance detection of pipeline blockages by transmitting low-frequency acoustic waves with reduced attenuation, enhancing detection accuracy and preventing damage from pressure differences.
Implementation Method 1
A low-frequency electroacoustic transducer disposed inside the sealing shell, the low-frequency electroacoustic transducer is connected to a signal generator and is configured to transmit an acoustic wave into a pipeline
Implementation Method 2
a sealing shell configured to be communicated with a pipeline, and a sealed pressure environment is formed inside the sealing shell
Implementation Method 3
Enables precise and long-distance detection of pipeline blockages by transmitting low-frequency acoustic waves with reduced attenuation
Data Source
AI summary
A low-frequency acoustic wave generating device for detecting pipeline blockage related to the technical field of pipeline detection is provided and includes a sealing shell configured to be communicated with a pipeline, a sealed pressure environment is formed inside the sealing shell. A low-frequency electroacoustic transducer is disposed inside the sealing shell, the low-frequency electroacoustic transducer is connected to a signal generator and is configured to transmit an acoustic wave into the pipeline. The device transmits the acoustic wave signals to a high-pressure gas pipeline, combined with a signal generator capable of generating any waveform, thereby emitting any waveform of acoustic wave signal into the pipeline. The use of acoustic waves with special markings and characteristics for pipeline blockage detection can improve the anti-noise interference ability of the acoustic wave detection, and improve the precision of the detection.