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A method for weakening the anharmonic mode interference of a bending vibration disk

A bending vibration, non-resonant technology, applied in the ultrasonic field, can solve the problems of phase disorder, heat generation, and inability to work properly.

Inactive Publication Date: 2018-11-20
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Usually, in the high-power working state, the disk radiator will not only excite the resonant mode required for the work, but also excite the non-resonant mode near the resonant mode, and these modes will be coupled with the resonant mode. As a result, the phase of each vibration element on the radiator is chaotic, and the resulting radiation sound field will no longer be the sound field generated by the pure resonance frequency mode, but a sound field with no sharp directivity and energy dispersion after interference cancellation. There will be noise and heat
Can't even work properly in severe cases

Method used

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  • A method for weakening the anharmonic mode interference of a bending vibration disk
  • A method for weakening the anharmonic mode interference of a bending vibration disk
  • A method for weakening the anharmonic mode interference of a bending vibration disk

Examples

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Effect test

Embodiment 1

[0031] A stepped disk radiator is taken as an example for illustration.

[0032] Such as figure 1 and 2 As shown, the radius of the stepped disc is 35.1 mm, the thickness of the base 1 is 5 mm, and the thickness of the step 2 is 8.5 mm. Now, a circular adjustment groove a is processed on the back of the disc radiator to widen the resonance frequency of the radiator and its adjacent The interval between the non-resonant frequencies, in order to weaken the interference of the non-resonant mode near the resonant frequency to the resonant mode, so that the radiation sound field generated by the vibration of the bending vibration disk is kept at the radiation sound field corresponding to the resonant mode to the greatest extent, It will not be affected by the interference and destructive effect of the sound field generated by the non-resonant mode and the sound field generated by the resonant mode, thereby improving the efficiency of sound action. The annular adjustment groove a ...

Embodiment 2

[0052] Take the flat disc radiator as an example for illustration.

[0053] Such as image 3 and 4 As shown, the radius of the plane disc radiator is 118mm, the radius of the first section line is 23mm, the radius of the second section line is 52.5mm, the radius of the third section line is 82mm, the radius of the fourth section line is 107.6mm, and the axis is symmetrically curved The resonant frequency in the vibration mode is 22246kHz, now by processing an annular adjustment groove a on the back of the disc radiator to widen the interval between the resonant frequency of the radiator and its adjacent non-resonant frequency, so as to weaken the vibration near the resonant frequency The interference of the non-resonant mode on the resonant mode keeps the radiation sound field generated by the vibration of the bending vibration disk at the radiation sound field corresponding to the resonant mode to the greatest extent, without being affected by the sound field generated by th...

Embodiment 3

[0072] Take the two-step disc radiator as an example for illustration.

[0073] Such as Figure 5 and 6 As shown, the radius of the radiator of the two-step disk is 57.5mm, the thickness of the base 1 is 5mm, the thickness of the step 2 is 8.5mm, the radius of the inner pitch line is 22mm, and the radius of the outer pitch line is 46mm. A ring-shaped adjustment groove a is processed on the back of the body to widen the interval between the resonant frequency of the radiator and its adjacent non-resonant frequency, so as to weaken the interference of the non-resonant mode near the resonant frequency to the resonant mode, so that the bending vibration disc The radiation sound field generated by the vibration is kept at the radiation sound field corresponding to the resonance mode to the greatest extent, and will not be affected by the interference and cancellation of the sound field generated by the non-resonance mode and the sound field generated by the resonance mode, thereby...

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Abstract

The invention relates to a method for reducing non-resonance mode interference of a flexural vibration disc. According to the method, an annular adjusting groove is processed on a back surface of a disc radiator to widen an interval between axisymmetric resonance frequency of the radiator and an adjacent non-resonance frequency so as to widen an interval of the resonance frequency and the non-resonance frequency when the flexural vibration disc is in a large power vibration work state, so interference of a non-resonance mode near the resonance frequency on a resonance mode can be weakened, a radiation sound field generated by vibration of the flexural vibration disc can be kept at a radiation sound field corresponding to the resonance mode to the maximum degree, destructive interference of a sound field generated by the non-resonance mode and a sound field generated by the resonance mode can be avoided, and thereby sound action efficiency is improved.

Description

technical field [0001] The invention belongs to the field of ultrasonic technology, in particular to a method for reducing non-resonance mode interference generated by an ultrasonic vibration radiator. Background technique [0002] The ultrasonic vibration transducer excites the disk radiator connected to it, and the disk radiator produces axisymmetric bending vibration. The radiation impedance of the bending vibration radiator can be better matched with the air medium, so it can radiate strong power into the air. Ultrasound has important applications in the fields of ultrasonic coagulation, ultrasonic defoaming, and ultrasonic suspension. In many of these applications, it is hoped that the vibrating body can work in an axisymmetric bending harmonic vibration state, generate directional and sharp sound waves, and work efficiently. [0003] Disc radiators include planar discs, one-step discs and two-step disc structures. The first-step disc radiators and two-step disc radiat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D19/02G10K11/175
CPCG05D19/02G10K11/175
Inventor 贺西平闫秀丽
Owner SHAANXI NORMAL UNIV