An Acoustic Signal Enhancer Based on Parameter Excitation

A parameter excitation and acoustic signal technology, applied in the direction of sensor, gain control, amplification control, etc., can solve the problem of poor manipulation and amplification of the acoustic signal enhancer, and achieve the effect of wide working bandwidth

Active Publication Date: 2022-06-28
HARBIN ENG UNIV
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Problems solved by technology

[0004] However, this acoustic signal booster has certain requirements on the frequency of the signal wave. If this theoretical model is used to make an acoustic signal booster, it can only amplify some high-frequency signal waves; and the underwater target signal frequency is generally Low frequency acoustic signals less than 3kHz, so this acoustic signal booster is not effective at manipulating and amplifying underwater target signals
At the same time, the acoustic wave amplification gain of this acoustic signal intensifier is related to the nonlinear parameters of the nonlinear medium layer and the intensity of the pumping wave, but there is no linear relationship with the nonlinear parameters and the intensity of the pumping wave, so it is difficult to control the nonlinear parameter , The strength of the pumping wave to precisely control the amplification gain of the sound wave

Method used

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  • An Acoustic Signal Enhancer Based on Parameter Excitation
  • An Acoustic Signal Enhancer Based on Parameter Excitation
  • An Acoustic Signal Enhancer Based on Parameter Excitation

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Embodiment approach

[0029] like figure 1 shown, a novel parametric excitation-based acoustic signal booster comprising a dielectric liquid layer with controllable sound velocity. The speed of sound in the TWT is periodically modulated by changing the properties of the dielectric liquid layer in the TWT by the control circuit of the alternating electric field. Embodiments of the present invention include the following steps:

[0030] Step 1: Set the mathematical model of the control circuit of the alternating electric field so that the traveling wave tube system filled with polar dielectrics can be periodically modulated, namely

[0031] Step 2: Add a sound source to the left end of the traveling wave tube, and apply a sine wave signal at the sound source, the sine wave signal P s =P 0 ·sin(2πf 0 t) Incident into the traveling wave tube.

[0032] Step 3: Use the traveling wave tube system in Step 1 to construct a small-amplitude acoustic wave equation in an ideal medium under the parameter ...

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Abstract

The invention discloses an acoustic signal enhancer based on parameter excitation, which belongs to the field of artificial acoustic devices. In particular, it relates to an acoustic signal enhancer capable of manipulating and amplifying acoustic energy, specifically amplifying a weak target acoustic signal by utilizing the parametric excitation resonance effect. The acoustic signal intensifier is composed of a control circuit providing an alternating electric field and a traveling wave tube filled with a polar dielectric, including a dielectric liquid layer with controllable sound velocity. The invention controls and amplifies the target acoustic signal by combining the frequency and amplitude of the parameter excitation introduced, and ensures that the target acoustic signal of any frequency is processed by regulating the frequency of the parameter excitation. At the same time, it solves the problem that the existing acoustic signal booster has a weak ability to amplify signals in the underwater acoustic frequency band, and can improve the detection distance and target recognition accuracy of the sonar system.

Description

technical field [0001] The invention relates to an acoustic signal intensifier based on parameter excitation, belonging to the field of artificial acoustic devices. In particular, it relates to an acoustic signal intensifier capable of manipulating and amplifying acoustic energy. Background technique [0002] The electronic triode is a semiconductor device that can amplify electrical signals; thanks to the appearance of the electronic triode, large-scale integrated circuits have developed rapidly and brought great changes to human society. Electricity and sound are different forms of energy carriers, and there are many similarities in their properties and applications. In the field of acoustics, the research of acoustic signal booster will have great historical significance and practical application value. Especially for underwater target detection, underwater long-distance communication, medical ultrasound and other fields that require precise control of sound energy, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R23/00H01P3/16H03G3/20
CPCH04R23/00H01P3/16H03G3/20
Inventor 张昊阳李祥时洁徐宇孙闻伯时胜国李松陈广智李洪道
Owner HARBIN ENG UNIV
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