Phase control method of acoustic energy conversion under nonlinear mutual action of three acoustic wavetrains

Abstract

The invention relates to a phase control method of acoustic energy conversion under the nonlinear mutual action of three acoustic wavetrains. The phase control method of acoustic energy conversion under the nonlinear mutual action of the three acoustic wavetrains is characterized in that the three acoustic wavetrains are sent in a water medium space position, x=0, in a concurrent mode and in the same direction, the three acoustic wavetrains satisfy the relation that omega1= omega3+ / - omega2, the omega1, the omega2 and the omega3 respectively represent the angular frequency of the first acoustic wavetrain, the angular frequency of the second acoustic wavetrain and the angular frequency of the third acoustic wavetrain, the transmitting sound power of the second acoustic wavetrain and the ransmitting sound power of the third acoustic wavetrain are large, an obvious nonlinear acoustic effect can be triggered in the water medium, and the three acoustic wavetrains have nonlinear mutual action. The control over acoustic energy is achieved by adjusting the phase phi i(x) (i=1, 2 and 3) among the three acoustic wavetrains and the phase relation phi 0(x), wherein the phase relation phi 0(x) = phi 3(x) - phi 2(x). According to the restrictive relation that the phase phi i(x) in the position x depends on the acoustic wave phase phi 0(x) in the initial position x=0, effective control over the space position where acoustic energy conversion occurs and the rising and decreasing effect of the acoustic energy is achieved only by adjusting the phase relation phi 0(0) under the initial condition.

Description

technical field [0001] The invention relates to the field of underwater acoustics, in particular to a phase control method for acoustic energy conversion under the nonlinear interaction of three columns of acoustic waves. Background technique [0002] At present, in the field of underwater acoustics, the energy conversion effect produced by the propagation and interaction of large-amplitude sound waves has very broad application prospects. For example, in the parametric array technology used in the field of underwater acoustics, the nonlinear interaction between two columns of sound Generate highly directional difference frequency waves (Parametric acoustic array: Theory, advancement, and applications. APPLIED ACOUSTICS.2012, 73(12): 1209-1210), and can emit three columns of acoustic waves satisfying a certain frequency coupling relationship in water media To realize the conversion of acoustic energy between three frequency modes (The Theory and Experiment of Parametric Ampl...

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Problems solved by technology

[0002] At present, in the field of underwater acoustics, the energy conversion effect produced by the propagation and interaction of large-amplitude sound waves has very broad application prospects. For example, in the parametric array technology used in the field of underwater acoustics, the nonlinear interaction between two columns of sound Generate highly directional difference frequency waves (Parametric acoustic array: Theory, advancement, and applications. APPLIED ACOUSTICS.2012, 73(12): 1209-1210), and can emit three columns of acoustic waves satisfying a certain frequency coupling relationship in water media To realize the conversion of acoustic energy between three frequency modes (The Theory and Experiment of Parametric Amplification of Three-wave Nonlinear Interaction in Water.Chinese Journal of Electronics.2013,22(2):308-312), although the The method can explain the mechanism of energy conversion in the water medium, but lacks the control means for energy conversion, and cannot effectively and autonomously realize the effective control of the rise and fall of the acoustic energy and the spatial position of the acoustic energy conversion

In the prior art, the phase control method of acoustic energy conversion under the nonlinear interaction of three columns of acoustic waves in water medium is still blank

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