CN219495334U - Ultrasonic transducer and ultrasonic flowmeter - Google Patents

Abstract

The present application relates to the field of ultrasonic technology, and in particular, to an ultrasonic transducer and an ultrasonic flowmeter; specifically, the ultrasonic transducer includes: the shell, piezoelectric ceramics, a backing, a first signal wire, a PCB and a sealing piece are arranged in the shell; wherein, the outside of the outer casing is provided with a positioning piece which is used for being matched with an external installation pipeline, and the inside of the outer casing is provided with a first fixing piece; the bottom of the piezoelectric ceramic is provided with a full electrode which is coupled with the shell, and the piezoelectric ceramic is provided with a second fixing piece which is matched with the first fixing piece. The positioning piece matched with the mounting pipeline is arranged outside the shell of the ultrasonic transducer, so that the stability of the transducer for receiving a signal after water pressure is applied can be improved; in addition, the inside of shell and piezoceramics dispose the mounting that mutually supports respectively, can fix piezoceramics's mounted position, overcome piezoceramics and because the signal difference problem that the mounted position is different brings, reduce the product and discern the condition that the signal of telecommunication has the mistake to appear.

Description

Ultrasonic transducer and ultrasonic flowmeter

Technical Field

The application relates to the technical field of ultrasonic waves, in particular to an ultrasonic transducer and an ultrasonic flowmeter.

Background

Currently, piezoelectric ceramics for ultrasonic transducers are generally printed with full electrodes or flanged electrodes; compared with a flanging electrode, the full-electrode receiving signal is more stable and better in consistency effect, but the mounting position of the piezoelectric ceramic in the ultrasonic transducer cannot be well fixed due to the fact that the bottom welding connecting wire is needed by the full electrode, and the receiving and transmitting signals among different products are different due to the fact that the mounting position is not fixed, the stability of the receiving and transmitting signals is poor, and mass production is not facilitated.

Disclosure of Invention

An object of the present application is to provide an ultrasonic transducer and an ultrasonic flowmeter, so as to solve at least one technical problem described above. The scheme provided by the embodiment of the application is specifically as follows:

in a first aspect, the present application provides an ultrasonic transducer comprising: the shell, piezoelectric ceramics, a backing, a first signal wire, a PCB and a sealing piece are arranged in the shell;

wherein, a positioning piece matched with an external installation pipeline is arranged outside the shell, and a first fixing piece is arranged inside the shell;

the bottom of the piezoelectric ceramic is provided with a full electrode which is coupled with the shell, and the piezoelectric ceramic is provided with a second fixing piece which is matched with the first fixing piece.

In a possible embodiment, a damping layer is arranged between the bottom of the piezoelectric ceramic and the housing, and the damping layer is formed by using an adhesive.

In a possible embodiment, the piezoelectric ceramic is welded to the top of the piezoelectric ceramic with one end of the first signal wire through a design structure of a connecting edge; the other end of the first signal wire is connected with the PCB.

In a possible embodiment, the silver-plated locations in the piezoelectric ceramic include a bottom, a top, and a location where the second fixture is disposed.

In a possible embodiment, the portable electronic device further comprises a second signal wire, wherein the lower end of the second signal wire is fixedly connected with the shell through the sealing piece.

In a possible embodiment, a lead wire connected to the PCB is disposed at a lower end of the second signal line.

In a possible embodiment, the positioning member is a boss, and the boss is sized in relation to the position of the ultrasonic transducer in the pipe installation.

In a possible embodiment, when the second fixing member is disposed on the side edge of the piezoelectric ceramic, the first fixing member is disposed on the inner side edge of the housing, and the height of the second fixing member is less than or equal to the height of the piezoelectric ceramic.

In a possible embodiment, when the second fixing member is disposed at the bottom of the piezoelectric ceramic, the first fixing member is disposed on the inner bottom of the housing;

when the first fixing piece is arranged to be convex, the second fixing piece is arranged to be a groove; or when the first fixing piece is provided with the groove, the second fixing piece is provided with the bulge.

In a second aspect, the present application provides an ultrasonic flow meter provided with an ultrasonic transducer according to the first aspect and any one of the preceding claims.

Compared with the prior art, the scheme of this application has following advantage:

the embodiment of the application provides an ultrasonic transducer and an ultrasonic flowmeter provided with the ultrasonic transducer. Specifically, on one hand, the outside of the shell of the ultrasonic transducer is provided with a positioning piece for positioning the ultrasonic transducer and the installation pipeline, so that the stability of receiving a signal after the water pressure is applied to the ultrasonic transducer can be increased; on the other hand, the inside of shell and piezoceramics are equipped with the mounting that mutually supports respectively, can unify the mounted position of piezoceramics among the fixed different products, overcome piezoceramics and because the signal difference problem that the mounted position is different and bring, reduce the product and discern the condition that the signal of telecommunication is wrong to appear, and improved the efficiency of production.

Additional aspects and advantages of the 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 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, in which:

FIG. 1 is a cross-sectional view of an ultrasonic transducer according to one embodiment of the present application;

FIG. 2 is a top view of a housing of an ultrasonic transducer according to one embodiment of the present application;

fig. 3 is a schematic diagram of a piezoelectric ceramic and a silver-coated piezoelectric ceramic according to an embodiment of the present application.

Reference numerals illustrate:

1-a shell, 11-a positioning piece and 12-a first fixing piece;

2-piezoelectric ceramics, 21-a second fixing piece;

3-backing;

4-a first signal line;

5-a PCB circuit board;

6, sealing;

7-second signal lines, 71-lead lines;

8-damping layer.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of illustrating the present application and are not to be construed as limiting the present application.

An ultrasonic transducer and an ultrasonic flowmeter provided in an embodiment of the present application are described below with reference to fig. 1 to 3.

In one aspect, the present embodiments provide an ultrasonic transducer, specifically, including a housing 1, a piezoelectric ceramic 2, a backing 3, a first signal line 4, a PCB circuit board 5, and a sealing member 6.

Wherein, as shown in fig. 1, a positioning piece 11 is arranged on the outer side of the housing 1, which can be used for positioning between the ultrasonic transducer and the mounting pipe. Alternatively, the positioning member 11 may be a boss, and the size of the boss is related to the position where the ultrasonic transducer is mounted in the pipe. It will be appreciated that by arranging the positioning element 11 on the outer side of the housing 1, the stability of the ultrasonic transducer mounted on the ultrasonic flowmeter can be improved, thereby increasing the stability of the ultrasonic transducer for receiving signals after the application of water pressure.

Wherein a first fixing member 12 is provided inside the housing 1, and correspondingly, the piezoelectric ceramic 2 is provided with a second fixing member 21 cooperating with the first fixing member 12. Through the cooperation of first mounting 12 and second mounting 21, can unify the mounted position of fixed piezoceramics 2 on shell 1 to through fixed piezoceramics's position, overcome the unstable problem of receiving and dispatching signal that brings because piezoceramics mounted position is different between the different products, can effectively reduce the product and discern the condition emergence that the signal of telecommunication is wrong, improve the product uniformity.

Alternatively, the bottom of the piezoelectric ceramic 2 is a full electrode coupled with the housing 1. Wherein, be equipped with damping layer 8 between the bottom of piezoceramics 2 and shell 1, and damping layer 8 can adopt the gluing agent to form. The damping layer 8 can effectively reduce the detachment risk of the piezoelectric ceramic 2 when the ultrasonic transducer is used for a long time, so as to effectively improve the stability of receiving signals.

Optionally, considering that the bonding position of the piezoelectric ceramic 2 is difficult to fix and the production efficiency is low due to the fact that the bottom welding connection line is welded, the piezoelectric ceramic 2 provided by the application adopts a design structure with the connecting edge, the bottom is led to the top for welding, one end of the first signal line 4 can be directly welded on the top of the piezoelectric ceramic 2 (as shown in fig. 1), the whole piezoelectric ceramic 2 is not required to be bypassed, and the difficulty of a welding process can be effectively reduced and the production efficiency can be improved due to the design of the structure; and because the bottom of the piezoelectric ceramic 2 is not blocked by a welding point or a signal wire, the installation stability between the piezoelectric ceramic 2 and the shell 1 can be effectively improved. Wherein the other end of the first signal line 4 is connected to a PCT circuit board 5 as shown in fig. 1.

Alternatively, as shown in fig. 3, the silver-plated positions in the piezoelectric ceramic 2 include a bottom, a top, and a position where the second fixing member 21 is provided.

Alternatively, the piezoelectric ceramic 2 may be a circular device, corresponding to the structure of the housing 1.

Optionally, as shown in fig. 1, the ultrasonic transducer further includes a second signal line 7, and a lower end of the second signal line 7 is fixedly connected to the housing 1 through the sealing member 6. Wherein the lower end of the second signal line 7 is provided with a lead 71 connected with the PCB circuit board 5.

In a possible embodiment, the second fixing member 21 is disposed on the side of the piezoelectric ceramic 2, and the first fixing member 12 is disposed on the inner side of the housing 1, as shown in fig. 1. Alternatively, the height of the second fixing member 21 is smaller than or equal to the height of the piezoelectric ceramic 2.

In a possible embodiment, the second fixing member 21 is provided on the bottom of the piezoelectric ceramic 2, and the first fixing member 12 is provided on the inner bottom of the housing 1.

On the basis of the above embodiments, when the first fixing member 12 is set to be convex, the second fixing member 21 may be set to be concave (concave piezoelectric ceramic as shown in fig. 3); or the second fixing member 21 may be provided with a protrusion when the first fixing member 12 is provided with a recess. It will be appreciated that the first fixing member 12 cooperates with the second fixing member 21 to fix the piezoelectric ceramic 2 in the mounting position of the housing 1.

Wherein the backing 3 may be an air backing. The sealing member 6 may be formed by using glue, for example, after the lead 71 of the second signal wire 7 is soldered to the PCB 5, a potting compound is filled in the casing 1 to form the whole ultrasonic transducer as shown in fig. 1.

In another aspect, an embodiment of the present application provides an ultrasonic flow meter, which is equipped with the ultrasonic transducer and the related parts shown in the above embodiment. The ultrasonic flow meter may be a spool piece ultrasonic flow meter for measuring the flow of fluid within the pipe. Alternatively, the ultrasonic flowmeter may also be connected by external clamping, plug-in, or the like.

The terms "first," "second," "third," "fourth," "1," "2," and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the present application described herein may be implemented in other sequences than those illustrated or otherwise described.

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

Claims (10)

1. An ultrasonic transducer, comprising: the piezoelectric ceramic sealing device comprises a shell (1), piezoelectric ceramics (2), a backing (3), a first signal wire (4), a PCB (printed circuit board) and a sealing piece (6), wherein the piezoelectric ceramics (2), the backing (3), the first signal wire (4), the PCB and the sealing piece are arranged in the shell (1);

wherein, a positioning piece (11) which is used for being matched with an external installation pipeline is arranged outside the shell (1), and a first fixing piece (12) is arranged inside the shell;

the bottom of the piezoelectric ceramic (2) is provided with a full electrode which is coupled with the shell (1), and the piezoelectric ceramic is provided with a second fixing piece (21) matched with the first fixing piece (12).

2. Ultrasonic transducer according to claim 1, characterized in that a damping layer (8) is arranged between the bottom of the piezoelectric ceramic (2) and the housing (1), which damping layer (8) is formed by means of an adhesive.

3. The ultrasonic transducer according to claim 1, characterized in that the piezoelectric ceramic (2) is welded to one end of the first signal line (4) on top of the piezoelectric ceramic (2) by a design structure of a connecting edge; the other end of the first signal wire (4) is connected with the PCB (5).

4. An ultrasonic transducer according to claim 3, characterized in that the silver-plated locations in the piezoelectric ceramic (2) comprise a bottom, a top and a location where the second fixture (21) is provided.

5. The ultrasonic transducer according to claim 1, further comprising a second signal line (7), wherein a lower end of the second signal line (7) is fixedly connected with the housing (1) through a sealing member (6).

6. The ultrasonic transducer according to claim 5, characterized in that the lower end of the second signal line (7) is provided with a lead (71) connected to the PCB circuit board (5).

7. An ultrasonic transducer according to any of claims 1-6, characterized in that the positioning element (11) is a boss, the dimensions of which are related to the position of the ultrasonic transducer in the pipe installation.

8. The ultrasonic transducer according to any one of claims 1 to 6, wherein the first fixing member (12) is provided on the inner side of the housing (1) when the second fixing member (21) is provided on the side of the piezoelectric ceramic (2), and the height of the second fixing member (21) is smaller than or equal to the height of the piezoelectric ceramic (2).

9. The ultrasonic transducer according to any one of claims 1 to 6, characterized in that the first fixing member (12) is provided on the inside bottom of the housing (1) when the second fixing member (21) is provided on the bottom of the piezoelectric ceramic (2);

when the first fixing piece (12) is arranged to be convex, the second fixing piece (21) is arranged to be a groove; or, when the first fixing member (12) is provided with a groove, the second fixing member (21) is provided with a protrusion.

10. An ultrasonic flow meter characterized in that an ultrasonic transducer as claimed in any one of claims 1 to 9 is provided.