CN215952753U - Hydrophone - Google Patents

Abstract

The embodiment of the application provides a hydrophone. The hydrophone includes: a metal substrate comprising a first surface; an insulating layer over the first surface of the metal substrate; and the piezoelectric ceramic is arranged on one side of the insulating layer, which is far away from the metal substrate. The method and the device can effectively avoid charge interference of piezoelectric ceramics, ensure the sensitivity of the hydrophone, further improve the charge interference resistance of the hydrophone, and have higher stability and reliability.

Description

Hydrophone

Technical Field

The application relates to the technical field of hydrophones, in particular to a hydrophone.

Background

A hydrophone is a transducer for receiving acoustic signals in water and converting the acoustic signals into electrical signals. The core component of the piezoelectric hydrophone is a piezoelectric element, and the change of the water pressure is converted into the change of the output voltage by utilizing the piezoelectric effect principle, so that the underwater vibration signal is detected. The hydrophone is widely used for underwater communication, continent exploration, target positioning, tracking and the like, is an important part of sonar, and is used for underwater detection, identification and communication, marine environment monitoring and marine resource development.

At present, in order to solve the insulation problem of the piezoelectric ceramics and the metal support sheet, paint and film are generally plated between the piezoelectric ceramics and the metal support sheet, but the vibration mode is weakened, and the firmness of the product is insufficient.

Disclosure of Invention

The hydrophone is provided aiming at the defects of the prior art and is used for solving the problem that vibration mode is weakened due to the fact that paint is plated and a film is plated between piezoelectric ceramic and a metal support sheet in the prior art, and charge interference of the piezoelectric ceramic can be effectively avoided.

The embodiment of the application provides a hydrophone, includes:

a metal substrate comprising a first surface;

an insulating layer over the first surface of the metal substrate;

and the piezoelectric ceramic is arranged on one side of the insulating layer, which is far away from the metal substrate.

In some embodiments, the first surface of the metal substrate is partially covered with the insulating layer, and an area of the first surface not covered by the insulating layer forms an exposed area.

In some embodiments, the piezoelectric ceramic comprises a second surface on a side away from the insulating layer;

the hydrophone further comprises:

and the protective layer is positioned on one side of the piezoelectric ceramic, which is far away from the insulating layer, and covers the second surface and the exposed area.

In some embodiments, further comprising:

and the shell is connected to the metal substrate, and a cavity is formed between one side of the metal substrate, which is far away from the insulating layer, and the metal substrate.

In some embodiments, the housing includes a stepped portion inside to support both ends of the metal substrate, and the stepped portion includes a first bearing step to support a first end of the metal substrate and a second bearing step to support a second end of the metal substrate.

In some embodiments, the cavity bottom is provided with at least one boss.

In some embodiments, further comprising:

and the signal wire comprises a first signal wire used for connecting a positive electrode and a second signal wire used for connecting a negative electrode, one end of each of the first signal wire and the second signal wire is connected on the piezoelectric ceramic, and the other end of each of the first signal wire and the second signal wire penetrates through the protective layer and is connected to the outside.

In some embodiments, the insulating layer is one of a glass layer and a piezoceramic layer.

In some embodiments, the housing is a stainless steel housing.

In some embodiments, the protective layer is a rubber protective layer.

Compared with the prior art, the hydrophone provided by the embodiment of the application has the following beneficial technical effects:

the hydrophone comprises a metal substrate, an insulating layer and piezoelectric ceramics, wherein the metal substrate comprises a first surface, the insulating layer is positioned on the first surface of the metal substrate, and the piezoelectric ceramics are arranged on one side, far away from the metal substrate, of the insulating layer, so that the metal substrate and the piezoelectric ceramics are mutually insulated by arranging the insulating layer between the metal substrate and the piezoelectric ceramics, the problem that in the prior art, paint and a film are plated between the piezoelectric ceramics and the metal support sheet, the piezoelectric ceramics and the metal support sheet are insulated, but the vibration mode is weakened due to the fact that the piezoelectric ceramics are simultaneously insulated is solved, the sensitivity of the hydrophone is guaranteed while the charge interference of the piezoelectric ceramics is effectively avoided, the anti-charge interference capability of the hydrophone is further improved, and the hydrophone has high stability and reliability. In addition, the hydrophone of the embodiment of the application has the advantages of simple structure, small size and low manufacturing cost.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a hydrophone provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a metal substrate, an insulating layer, and a piezoelectric ceramic according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

Referring to fig. 1, a schematic structural diagram of a hydrophone provided in an embodiment of the present application is shown, where the hydrophone provided in the embodiment of the present application includes:

a metal substrate 1, said metal substrate 1 comprising a first surface 11;

an insulating layer 2, said insulating layer 2 being located on said first surface 11 of said metal substrate 1;

and the piezoelectric ceramic 3 is arranged on one side of the insulating layer 2 far away from the metal substrate 1.

It should be noted that, in order to solve the insulation problem between the metal substrate and the piezoelectric ceramic in the prior art, the vibration mode is weakened by coating paint and film between the metal substrate and the piezoelectric ceramic. In this application, referring to fig. 2, a schematic structural diagram of a metal substrate, an insulating layer, and a piezoelectric ceramic provided in an embodiment of the present application is shown, in which the insulating layer 2 is disposed between the metal substrate 1 and the piezoelectric ceramic 3, and the metal substrate 1 and the piezoelectric ceramic 3 are insulated from each other, so that the charge interference resistance of the piezoelectric ceramic is improved, and the vibration mode of the hydrophone is not affected.

Further, when the hydrophone works, the metal substrate 1 vibrates and amplifies signals under the action of external stress, the signals are transmitted to the piezoelectric ceramics 3, the piezoelectric ceramics 3 convert the signals into electric signals, at the moment, the metal substrate 1 and the piezoelectric ceramics 3 are mutually insulated, the charge interference of the metal substrate 1 to the piezoelectric ceramics 3 is prevented, the vibration of the metal substrate 1 is not influenced, and the sensitivity of the hydrophone is ensured.

In some embodiments, the insulating layer 2 is one of a glass layer and a piezoceramic layer.

The insulating layer 2 may be a glass layer or a single piezoelectric ceramic layer. Illustratively, the thickness of the insulating layer 2 is set to be 1-200um, and the insulating property and the reliability of the insulating layer are good, and the coupling degree with the piezoelectric ceramic 3 is good.

In some embodiments, the metal substrate 1 needs to have high hardness and elasticity in order to support the piezoelectric ceramic 3 and to realize the vibration function of the metal substrate 1. Preferably, beryllium copper alloy is used for the metal substrate 1.

In some embodiments, the first surface 11 of the metal substrate 1 is partially covered with the insulating layer 2, and the area of the first surface 11 not covered by the insulating layer 2 forms an exposed area.

In this embodiment, referring to fig. 1 and 2, the piezoelectric ceramic 3 is completely attached to one side of the insulating layer 2, and the insulating layer 2 covers a part of the first surface 11 of the metal substrate 1, so as to prevent the insulating layer 2 from contacting the housing 5 to weaken vibration, increase the risk of damage, and simultaneously enable the piezoelectric ceramic 3 and the metal substrate 1 to be better combined, thereby improving the stability of the hydrophone. Further, since the first surface 11 of the metal substrate 1 is partially covered with the insulating layer 2, and an orthographic projection of the insulating layer 2 on the first surface 11 is smaller than an area of the first surface 11, a region of the insulating layer 2 not covering the first surface 11 of the metal substrate 1 is taken as an exposed region.

In some embodiments, the piezoelectric ceramic 3 comprises a second surface 31 on a side remote from the insulating layer 2;

the hydrophone further comprises:

and the protective layer 4 is positioned on one side of the piezoelectric ceramic 3, which is far away from the insulating layer 2, and covers the second surface 31 and the exposed area.

In this application, the protective layer 4 plays a role of sealing protection and vibration isolation, and is required to have good sealing property and corrosion resistance to seawater, and its characteristic impedance is close to that of water. Preferably, the protective layer 4 is a rubber protective layer, and further, the rubber protective layer may be made of polysulfide rubber. In the present embodiment, referring to fig. 1, the protection layer 4 is located on a side of the piezoelectric ceramic 3 away from the insulation layer 2, that is, on the second surface 31 of the piezoelectric ceramic 3, and covers the second surface 31 of the piezoelectric ceramic 3, the side surface of the insulation layer 2, and the exposed area on the metal substrate 1, so as to protect and isolate the piezoelectric ceramic 3, the insulation layer 2, and the metal substrate 1.

In some embodiments, the hydrophone further comprises:

and the shell 5 is connected to the metal substrate 1, and a cavity is formed between the metal substrate 1 and one side of the metal substrate 1 far away from the insulating layer 2.

In this embodiment, referring to fig. 1, in order to realize the vibration of the metal substrate 1, the housing 5 is used to support the metal substrate 1, and the bottom inside the housing 5 and the metal substrate 1 form a cavity, so that the inside of the housing 5 is in a groove structure, and a space is provided for the vibration of the metal substrate 1.

Preferably, the housing 5 is a stainless steel housing with good corrosion resistance.

In some embodiments, the housing 5 includes a step portion 51 for supporting two ends of the metal substrate 1, and the step portion 51 includes a first bearing step 511 for supporting a first end of the metal substrate 1 and a second bearing step 512 for supporting a second end of the metal substrate 1.

Referring to fig. 1, in order to support the metal substrate 1, in this embodiment, a step portion 51 is disposed on a side wall inside the housing 5, the step portion 51 includes a first carrying step 511 and a second carrying step 512, and the first carrying step 511 and the second carrying step 512 can be symmetrically disposed and are respectively used for supporting two ends of the metal substrate 1, so that a cavity is formed between the metal substrate 1 and the bottom inside the housing 5, and the vibration performance of the hydrophone is ensured.

In some embodiments, at least one boss 52 is provided inside the housing 5 at the bottom of the cavity.

In the present embodiment, referring to fig. 1, the height of each boss 52 is smaller than the distance between the metal substrate 1 and the bottom of the cavity, so as to ensure that the metal substrate 1 can normally vibrate. In the embodiment, the boss 52 is arranged to limit the large deformation of the metal substrate 1, so as to protect the metal substrate 1. In addition, in the embodiment, three bosses 52 are provided at the bottom of the cavity, so as to improve the protection of the metal substrate 1, but the specific number of the bosses is not limited in the present application.

In some embodiments, the hydrophone further comprises:

and the signal line 6 comprises a first signal line 61 for connecting a positive electrode and a second signal line 62 for connecting a negative electrode, one end of each of the first signal line 61 and the second signal line 62 is connected to the piezoelectric ceramic 3, and the other end of each of the first signal line 61 and the second signal line 62 penetrates through the protective layer 4 to be connected to the outside.

In the present embodiment, referring to fig. 1, the metal substrate 1 is vibrated by an external force, so that the piezoelectric ceramic 3 converts the vibration signal into an electrical signal for detecting the change of the water pressure. Therefore, the present embodiment obtains the generated positive and negative electrodes by providing the signal lines 6, and transmits the positive electrical signal and the negative electrical signal to the outside via the insulating protective layer 4.

The utility model provides a hydrophone, hydrophone includes metal substrate, insulating layer and piezoceramics, and the metal substrate includes the first surface, and the insulating layer is located the metal substrate on the first surface, and piezoceramics sets up the insulating layer is kept away from one side of metal substrate is through setting up the insulating layer between metal substrate and piezoceramics like this for mutual insulation between metal substrate and the piezoceramics, be used for solving among the prior art between piezoceramics and the metal backing sheet paint, coating film, make between piezoceramics and the metal backing sheet insulating, but arouse the problem that the vibration mode weakens simultaneously, guaranteed the sensitivity of hydrophone when can effectively avoid piezoceramics's charge interference, further improved the ability of hydrophone's anti-charge interference, higher stability and reliability have. In addition, the hydrophone of the embodiment of the application has the advantages of simple structure, small size and low manufacturing cost.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims (10)

1. A hydrophone, comprising:

a metal substrate comprising a first surface;

an insulating layer over the first surface of the metal substrate;

and the piezoelectric ceramic is arranged on one side of the insulating layer, which is far away from the metal substrate.

2. The hydrophone of claim 1, wherein the first surface of the metal substrate is partially covered with the insulating layer, and wherein areas of the first surface not covered by the insulating layer form exposed areas.

3. The hydrophone of claim 2, wherein the piezoelectric ceramic comprises a second surface on a side remote from the insulating layer;

the hydrophone further comprises:

and the protective layer is positioned on one side of the piezoelectric ceramic, which is far away from the insulating layer, and covers the second surface and the exposed area.

4. The hydrophone of claim 1, further comprising:

and the shell is connected to the metal substrate, and a cavity is formed between one side of the metal substrate, which is far away from the insulating layer, and the metal substrate.

5. The hydrophone of claim 4, wherein the interior of the housing comprises a step portion for supporting the ends of the metal substrate, the step portion comprising a first load-bearing step for supporting a first end of the metal substrate and a second load-bearing step for supporting a second end of the metal substrate.

6. The hydrophone of claim 4, wherein the bottom of the cavity is provided with at least one boss.

7. The hydrophone of claim 3, further comprising:

and the signal wire comprises a first signal wire used for connecting a positive electrode and a second signal wire used for connecting a negative electrode, one end of each of the first signal wire and the second signal wire is connected on the piezoelectric ceramic, and the other end of each of the first signal wire and the second signal wire penetrates through the protective layer and is connected to the outside.

8. The hydrophone of claim 1, wherein the insulating layer is one of a glass layer and a piezoceramic layer.

9. The hydrophone of claim 4, wherein the housing is a stainless steel housing.

10. The hydrophone of claim 3, wherein the protective layer is a rubber protective layer.

Images