Design method of a multi-excitation broadband ring transducer

Abstract

The present invention relates to the technical field of ring transducers, and particularly relates to a design method for a multi-excitation broadband ring transducer with a low water permeability coefficient and a low sound insertion loss. By using two rings with the same outer diameter and height but different inner diameters, they are made to operate at two different frequencies f1 and f2 respectively; when in use, the two rings are connected in series or in parallel, and the resonance frequencies of the two rings themselves are coupled to expand the receiving or transmitting bandwidth. In the state where the two rings are connected in series, the anti-resonance frequencies of f1 and f2 are coupled to expand the receiving bandwidth. In the state where the two rings are connected in parallel, the resonance frequencies of f1 and f2 are coupled to expand the transmitting bandwidth; through the design method, the purpose of multi-excitation coupling to expand the bandwidth is achieved while the external dimensions of the transducer remain unchanged.

Description

Technical Field

[0001] The present invention relates to the technical field of ring transducers, and particularly relates to a design method for a multi-excitation broadband ring transducer. Background Art

[0002] As a simple and reliable transducer, the ring transducer has characteristics such as circumferential non-directionality and a wide design frequency coverage range, and is often used as an underwater transponder. With the continuous development of underwater acoustic technology, new requirements have been put forward for the working bandwidth of transducers.

[0003] The main ways to expand the bandwidth of the ring transducer are to reduce its own mechanical quality factor, multi-modal coupling, and increase the matching layer. Among them, the improvement of the transducer bandwidth by reducing its own mechanical quality factor is relatively limited, and the matching layer technology has relatively strict requirements for the process. The ring transducer working in the low-frequency band mainly realizes broadband operation through the coupling of the liquid cavity resonance mode and the ring resonance mode. However, as the working frequency continues to increase and the ring size continues to decrease, limited by the structural size, it is difficult to achieve the method of expanding the bandwidth by multi-modal coupling. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a design method for a multi-excitation broadband ring transducer, which realizes the purpose of expanding the bandwidth by multi-excitation coupling without changing the external dimensions of the transducer.

[0005] The present invention is realized through the following technical solutions:

[0006] A design method for a multi-excitation broadband ring transducer, which uses two rings with the same outer diameter and height but different inner diameters to operate at two different frequencies f1 and f2 respectively;

[0007] When in use, the two rings are connected in series or in parallel, and the receiving or transmitting bandwidth is expanded through the mutual coupling of the resonance frequencies of the two rings themselves.

[0008] Preferably, when the two rings are connected in series, the anti-resonance frequencies of f1 and f2 are mutually coupled to expand the receiving bandwidth.

[0009] Preferably, when the two rings are connected in parallel, the resonance frequencies of f1 and f2 are mutually coupled to expand the transmitting bandwidth.

[0010] Preferably, the resonance frequency of the ring transducer itself is inversely proportional to the average diameter of the ring and has no obvious correlation with the wall thickness and height of the ring.

[0011] Preferably, through the design method, the purpose of expanding the bandwidth by multi-excitation coupling is achieved without changing the external dimensions of the transducer.

[0012] The beneficial effects of the present invention are as follows:

[0013] The resonant frequency of the ring transducer itself is inversely proportional to the average diameter of the ring and has no obvious correlation with the wall thickness and height of the ring. According to this characteristic, two rings with the same outer diameter and height but different inner diameters are designed to operate at two different frequencies. In actual use, the two rings are connected in series or parallel (as Figure 1 shown), and the receiving or transmitting bandwidth is extended through the mutual coupling of the resonant frequencies of the two rings themselves. The present invention realizes the extension of the bandwidth through multi-excitation coupling while keeping the external dimensions of the transducer unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic structural diagram of two rings of the present invention at frequencies (f1, f2);

[0016] Figure 2 It is the receiving sensitivity curve of two rings with different inner diameters of the present invention when working alone at (f1, f2) and the receiving sensitivity curve when connected in series;

[0017] Figure 3 It is the transmission response curve of two rings with different inner diameters of the present invention when working alone at (f1, f2) and the transmission response curve when connected in parallel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0019] Embodiment 1:

[0020] Please refer to Figures 1 to 3 shown: A design method of a multi-excitation broadband ring transducer, by using two rings with the same outer diameter and height but different inner diameters to operate at two different frequencies f1 and f2 respectively;

[0021] When in use, the two rings are connected in series or in parallel, and the resonant frequencies of the two rings themselves are coupled to each other to expand the receiving or transmitting bandwidth.

[0022] As a preferred embodiment of the present invention, in the state where the two rings are connected in series, the anti-resonant frequencies of f1 and f2 are coupled to each other, expanding the receiving bandwidth.

[0023] As a preferred embodiment of the present invention, in the state where the two rings are connected in parallel, the resonant frequencies of f1 and f2 are coupled to each other, expanding the transmitting bandwidth.

[0024] As a preferred embodiment of the present invention, the resonant frequency of the ring transducer itself is inversely proportional to the average diameter of the ring and has no obvious correlation with the wall thickness and height of the ring.

[0025] As a preferred embodiment of the present invention, through the above design method, the purpose of expanding the bandwidth by multi-excitation coupling is achieved while the external dimensions of the transducer remain unchanged.

[0026] Figure 2 The figure shows the receiving sensitivity curves of two rings (f1, f2) with different inner diameters when working alone and the receiving sensitivity curve when connected in series; Figure 3 The figure shows the transmitting response curves of two rings (f1, f2) with different inner diameters when working alone and the transmitting response curve when connected in parallel. In the series state, the anti-resonant frequencies of f1 and f2 are coupled to each other, expanding the receiving bandwidth; in the parallel state, the resonant frequencies of f1 and f2 are coupled to each other, expanding the transmitting bandwidth. The present invention realizes the expansion of the bandwidth by multi-excitation coupling while the external dimensions of the transducer remain unchanged.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A design method for a multi-excitation broadband ring transducer, characterized in that: By using two rings with the same outer diameter and height but different inner diameters, enabling them to operate at two different frequencies f1 and f2 respectively; During use, the two rings are connected in series or parallel, and the resonance frequencies of the two rings are coupled with each other to expand the receiving or transmitting bandwidth; In the state where the two rings are connected in series, the anti-resonance frequencies of f1 and f2 are coupled with each other, expanding the receiving bandwidth; In the state where the two rings are connected in parallel, the resonance frequencies of f1 and f2 are coupled with each other, expanding the transmitting bandwidth; The resonance frequency of the ring transducer itself is inversely proportional to the average diameter of the ring and has no obvious correlation with the wall thickness and height of the ring; Through the design method, the purpose of expanding the bandwidth by multi-excitation coupling is achieved while keeping the external dimensions of the transducer unchanged.

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