CN219319572U

CN219319572U - High-precision sound velocity measuring transducer

Info

Publication number: CN219319572U
Application number: CN202320091355.0U
Authority: CN
Inventors: 尹雅倩; 李珺杰; 赵蔚彬
Original assignee: Haiying Enterprise Group Co Ltd
Current assignee: Haiying Enterprise Group Co Ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-07-07
Anticipated expiration: 2033-01-31

Abstract

The utility model relates to a high-precision sound velocity measuring transducer, which belongs to a component on a physical measuring instrument. The transducer comprises a low linear expansion coefficient microcrystalline glass shell, a transducer probe and a reflecting plate. Compared with the prior art, the utility model has the advantages that: the ultrasonic transducer probe is arranged in the inner groove of the shell, the working radiation surface of the ultrasonic transducer probe is parallel to the external reflecting plate, and the distance between the radiation surface and the sound reflecting plate is the sound path in sound velocity measurement. The shell made of the microcrystalline glass with low linear expansion coefficient has the sound path which can be calculated to be about 0.0022mm in root mean square error of deformation in the temperature change range, and the sound path in sound velocity measurement is ensured to be a fixed value. The device has the advantages of high sound velocity measurement precision, small volume, low loss, simple process, material innovation and the like, and is widely suitable for long-time continuous measurement of marine investigation and underwater mapping.

Description

High-precision sound velocity measuring transducer

Technical Field

The utility model relates to the technical field of measuring instruments, in particular to a high-precision sound velocity measuring transducer.

Background

The underwater sound velocity is used as an important parameter of all sonar equipment and is widely applied to the fields of marine investigation, underwater engineering, underwater surveying and mapping, underwater navigation and the like, and along with the upgrading of various sonar equipment, the accuracy of sound velocity measurement is also required to be higher and higher, so that the high-accuracy underwater sound velocity measuring device plays an important role in the technical improvement of the related fields.

The acoustic velocity in water, which is one of basic physical parameters, is generally in the range of 1400m/s to 1600m/s, changes along with the changes of temperature, salinity and water pressure in water, the acoustic velocity measurement accuracy in water has a direct relation with the deformation amount of sound path, the linear expansion coefficient of the transducer device material of the acoustic velocity meter is higher at present, the probe process operation is complex, the deformation of the sound path along with the changes of temperature, salinity and water pressure is larger, and the acoustic velocity measurement accuracy is low.

In view of the foregoing, it is desirable to provide a high-precision acoustic velocity measuring transducer and a method for manufacturing the same, so as to solve the above-mentioned technical problems.

Disclosure of Invention

In order to solve the above technical problems, a high-precision sound velocity measuring transducer of the present utility model includes:

the transducer probe 1, the transducer probe 1 is composed of an epoxy matching layer 4, a piezoelectric ceramic wafer 5, a glass ceramics support base 6, a backing layer 7, a first lead 8 and a second lead 9, wherein the top of the glass ceramics support base 6 is provided with the piezoelectric ceramic wafer 5, and the first lead 8 connected with the anode and the second lead 9 connected with the cathode are respectively welded below the piezoelectric ceramic wafer 5; the top of the piezoelectric ceramic wafer 5 is provided with an epoxy matching layer 4, and the lower part is provided with a backing layer 7 glued with the piezoelectric ceramic wafer 5;

the glass ceramics support 2, glass ceramics support 2 is equipped with the inner chamber and is used for installing transducer probe 1, and glass ceramics support 2 is equipped with supporting glass ceramics reflecting plate 3.

Compared with the prior art, the utility model has the advantages that: the transducer comprises a low linear expansion coefficient microcrystalline glass shell, a transducer probe and a reflecting plate. The ultrasonic transducer probe is arranged in the inner groove of the shell, the working radiation surface of the ultrasonic transducer probe is parallel to the external reflecting plate, and the distance between the radiation surface and the sound reflecting plate is the sound path in sound velocity measurement. The shell made of the microcrystalline glass with low linear expansion coefficient has the sound path which can be calculated to be about 0.0022mm in root mean square error of deformation in the temperature change range, and the sound path in sound velocity measurement is ensured to be a fixed value. The device has the advantages of high sound velocity measurement precision, small volume, low loss, simple process, material innovation and the like, and is widely suitable for long-time continuous measurement of marine investigation and underwater mapping.

Preferably, the piezoelectric ceramic wafer 5 is glued to the backing layer 7 by means of a solid repair paste.

Preferably, the backing layer 7 is provided with a small opening near the flanging, and the specification of the small opening is matched with that of the first lead 8 and the second lead 9.

Preferably, the gap at the small opening is filled with a waterproof glue.

Preferably, the glass-ceramic support base 6 is bonded to the backing layer 7.

Preferably, the epoxy matching layer 4 is integrally poured around the probe and polished to form a watertight layer structure.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.

Fig. 1 is a schematic diagram of a high-precision sonic velocity measurement transducer according to the present utility model.

Fig. 2 is a schematic diagram of the structure of a transducer probe of a high-precision sonic velocity measurement transducer of the present utility model.

As shown in the figure: 1. the transducer probe comprises a transducer probe body, a glass ceramics support, a glass ceramics reflecting plate, an epoxy matching layer, a piezoelectric ceramic wafer, a glass ceramics supporting base, a backing layer, a wire I, a wire 9, a wire II, a wire 10 and an epoxy composite material.

Detailed Description

As shown in figure 1, the device is a sound velocity measuring transducer, and consists of a microcrystalline glass bracket 2, a microcrystalline glass reflecting plate 3 and a transducer probe 1 positioned in an inner cavity of the microcrystalline glass. The microcrystalline glass bracket 2, the microcrystalline glass reflecting plate 3 and the inner cavity for placing the transducer probe 1 are made of glass microcrystalline materials with low linear expansion coefficients, so that the integration is maintained, the parallel and opposite distance between the radiation surface of the transducer probe 1 and the microcrystalline glass reflecting plate 3 is ensured, namely, the sound path in sound velocity measurement is a fixed value.

In one embodiment of the present utility model, as shown in fig. 2, the piezoelectric ceramic wafer 5 is welded with the first conductive wire 8 and the second conductive wire 9, and the piezoelectric ceramic wafer 5 and the backing layer 7 are glued together by using a solid repair paste.

The backing layer 7 is close to the flanging and is provided with a small opening so that the first lead 8 and the second lead 9 can be conveniently led out, and water tightness is increased in a mode of adding waterproof glue to supplement the waterproof glue. The glass ceramic support base 6 is bonded to the backing layer 7. The corrosion-resistant waterproof epoxy matching layer 4 is integrally poured around the probe, polished to a proper thickness and serves as a watertight layer. After the assembly of the transducer probe 1 is finished, the transducer probe is integrally placed into a microcrystalline glass inner cavity with a low linear expansion coefficient, and the whole sound velocity measuring transducer is manufactured.

In one embodiment of the utility model, as shown in fig. 1 and 2, the transducer probe 1 is mounted in an inner groove of a housing, a working radiation surface of the transducer probe is parallel to an external glass ceramic reflecting plate 3, and the distance of the glass ceramic reflecting plate 3 is the sound path in sound velocity measurement. The shell made of the microcrystalline glass with low linear expansion coefficient has the sound path which can be calculated to be about 0.0022mm in root mean square error of deformation in the temperature change range, and the sound path in sound velocity measurement is ensured to be a fixed value.

The device has the advantages of high sound velocity measurement precision, small volume, low loss, simple process, material innovation and the like, and is widely suitable for long-time continuous measurement of marine investigation and underwater mapping.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims

1. A high accuracy sonic measuring transducer comprising:

the transducer probe (1), the transducer probe (1) is composed of an epoxy matching layer (4), a piezoelectric ceramic wafer (5), a glass ceramics supporting base (6), a backing layer (7), a first lead (8) and a second lead (9), wherein the top of the glass ceramics supporting base (6) is provided with the piezoelectric ceramic wafer (5), and a first lead (8) connected with an anode and a second lead (9) connected with a cathode are respectively welded below the piezoelectric ceramic wafer (5); an epoxy matching layer (4) is arranged at the top of the piezoelectric ceramic wafer (5), and a backing layer (7) glued with the piezoelectric ceramic wafer (5) is arranged below the piezoelectric ceramic wafer;

the glass ceramics support (2), glass ceramics support (2) are equipped with the inner chamber and are used for installing transducer probe (1), and glass ceramics support (2) are equipped with supporting glass ceramics reflecting plate (3).

2. The sound speed measuring transducer of claim 1, wherein: the piezoelectric ceramic wafer (5) is connected with the backing layer (7) through solid repair adhesive in a gluing way.

3. The sound speed measuring transducer of claim 1, wherein: the backing layer (7) is provided with a small opening near the flanging, and the specification of the small opening is matched with that of the first lead (8) and the second lead (9).

4. A sound speed measuring transducer according to claim 3, wherein: the gap at the small opening is filled with waterproof glue.

5. The sound speed measuring transducer of claim 1, wherein: the microcrystalline glass supporting base (6) is adhered to the backing layer (7).

6. The sound speed measuring transducer of claim 1, wherein: the epoxy matching layer (4) is integrally poured and covered around the probe, and polished to form a watertight layer structure.