Ultrasonic hydrophone and noise detection equipment

Abstract

The utility model relates to an ultrasonic hydrophone and noise detection equipment, which comprises an inner shell, a cover plate assembly, piezoelectric ceramics, a circuit board and a cable assembly, and the lower end of the inner shell is open; the cover plate assembly comprises a front cover plate and a rear cover plate, the front cover plate is connected with the inner shell through the opening, and the rear cover plate is arranged in the inner shell; the piezoelectric ceramic is arranged in the inner shell and located between the front cover plate and the rear cover plate. The circuit board is arranged in the inner shell and above the rear cover plate, and the circuit board is isolated from the piezoelectric ceramic through first sealing glue; the cable assembly comprises a four-core shielded cable and a two-core cable, the input end of the four-core shielded cable is connected with the circuit board, the output end of the four-core shielded cable is used for being connected with an upper computer, the input end of the two-core cable is connected with the piezoelectric ceramic, and the output end of the two-core cable is connected with the circuit board. According to the technical scheme of the invention, the piezoelectric ceramic is adopted, and the receiving sensitivity of the piezoelectric ceramic is higher, so that the signal can be captured only by directly installing the ultrasonic hydrophone on the pipeline, and the limitation of installation conditions is avoided.

Description

Technical Field

[0001] The utility model relates to the field of hydrophone detection, in particular to an ultrasonic hydrophone and noise detection equipment. Background Art

[0002] As a marine acoustic remote sensing method, underwater noise measurement can be used to estimate relevant environmental parameters such as wind speed, waves, earthquakes, tsunamis, etc.; monitor underwater biological noise and man-made noise sources; and study the physical mechanisms of underwater noise generation and propagation and their statistical characteristics.

[0003] Existing hydrophone sensors detect the noise generated by the flow of liquid on the outer surface of a pipe. The captured signal is then uploaded to a host computer for analysis. However, existing hydrophone sensors require contact with the liquid to capture the signal, which limits their installation. Utility Model Content

[0004] In view of the above problems, the present application provides an ultrasonic hydrophone and noise detection equipment to solve the technical problem that the existing hydrophone detection sensor needs to be in contact with the liquid to capture the signal and the installation conditions are easily restricted.

[0005] To achieve the above objectives, in a first aspect, the inventors provide an ultrasonic hydrophone, comprising:

[0006] an inner shell, wherein the lower end of the inner shell is open;

[0007] The cover plate assembly includes a front cover plate and a rear cover plate, the front cover plate is connected to the inner shell through an opening, and the rear cover plate is arranged in the inner shell;

[0008] Piezoelectric ceramics are arranged in the inner shell and located between the front cover and the rear cover;

[0009] A circuit board is disposed in the inner shell and above the rear cover, with the circuit board and the piezoelectric ceramic being isolated by a first sealing glue;

[0010] The cable assembly includes a four-core shielded cable and a two-core cable. The input end of the four-core shielded cable is connected to the circuit board, and the output end of the four-core shielded cable is used to connect to the host computer. The input end of the two-core cable is connected to the piezoelectric ceramic, and the output end of the two-core cable is connected to the circuit board.

[0011] Unlike existing technologies, this application's solution utilizes piezoelectric ceramics. Due to their higher sensitivity, the ultrasonic hydrophone can capture signals simply by mounting it directly on the pipe, regardless of installation conditions. Specifically, the piezoelectric ceramic receives the signal and transmits it to a circuit board via a two-core cable. The circuit board then amplifies the signal and transmits it via a four-core shielded cable to a host computer, which analyzes and calculates the location of the leak source.

[0012] As an embodiment of the present invention, the ultrasonic hydrophone also includes an upper cover, which is arranged in the inner shell and located above the circuit board. The input end of the four-core shielded cable passes through the upper cover and the first sealing glue in sequence and is connected to the circuit board.

[0013] Thus, the four-core shielded cable can be fixed conveniently by arranging the upper cover. Therefore, preferably, the upper cover is arranged to be installed on the top of the inner shell.

[0014] As an embodiment of the present invention, the ultrasonic hydrophone further includes an outer shell, which is sleeved outside the inner shell. The outer shell and the inner shell are sealed by a second sealing glue, and the lower end of the front cover protrudes from the outer shell.

[0015] In this way, by providing the outer shell and the second sealant provided between the outer shell and the inner shell, the second sealant can play a waterproof role and further protect the inner components of the inner shell.

[0016] As an embodiment of the present invention, the ultrasonic hydrophone further includes an elastic member, one end of the elastic member is connected to the top of the inner shell, and the other end of the elastic member is connected to the inner top of the outer shell.

[0017] Thus, the elastic member can be provided to enable the front cover to better receive the signal generated on the pipe wall due to the flow of liquid in the detection pipe.

[0018] As an embodiment of the present invention, the ultrasonic hydrophone further includes a magnetic ring, which is installed at the bottom of the interior of the housing.

[0019] In this way, the ultrasonic hydrophone can be conveniently mounted on the detection pipe by magnetic attraction by providing the magnetic ring.

[0020] As an implementation manner of the present invention, the first sealing glue and the second sealing glue are both polyurethane potting glue.

[0021] Thus, the polyurethane potting compound has good waterproof performance.

[0022] To achieve the above objectives, in a second aspect, the inventors provide a noise detection device, comprising:

[0023] As any of the ultrasonic hydrophones provided by the inventors above, the ultrasonic hydrophone is used to be installed on a detection pipeline;

[0024] Host computer, the output end of the four-core shielded cable is connected to the host computer.

[0025] Different from the existing technology, the technical solution of the present application is that the ultrasonic hydrophone transmits the detected signal to the host computer through a four-core shielded cable, and presents an intuitive signal waveform on the host computer through RS485 communication, which can better collect and save data for a long time.

[0026] As an embodiment of the present invention, the noise detection device further includes two or more fixings, two ultrasonic hydrophones are provided, one ultrasonic hydrophone corresponds to at least one fixing, and the two ultrasonic hydrophones are installed on the detection pipe at intervals through the fixings.

[0027] In this way, the ultrasonic hydrophone can be mounted on the detection pipe by providing a fixing member. In actual use, the location of the liquid leakage source is calculated based on the time it takes for two ultrasonic hydrophones, which are spaced a certain distance apart, to capture the noise signal generated by the liquid flowing in the detection pipe.

[0028] As an implementation manner of the present utility model, the fixing piece is a clamp or a pipe clamp.

[0029] In this way, the fixing piece is provided as a clamp or a pipe clamp, which has a simple structure.

[0030] The above-mentioned records related to the content of the utility model are only an overview of the technical solution of this application. In order to enable ordinary technicians in this field to understand the technical solution of this application more clearly, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purposes and other purposes, features and advantages of this application easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of this application and other related contents, and are not to be considered as limiting this application.

[0032] In the drawings of the specification:

[0033] Figure 1 This is a structural diagram of an ultrasonic hydrophone installed on a detection pipe through a fixing member according to an embodiment of the present application;

[0034] Figure 2 This is a schematic diagram of the structure of an ultrasonic hydrophone according to an embodiment of the present application. Figure 1 ;

[0035] Figure 3 This is a schematic diagram of the structure of an ultrasonic hydrophone according to an embodiment of the present application. Figure 2 ;

[0036] Figure 4 This is a schematic diagram of the structure of an ultrasonic hydrophone according to an embodiment of the present application. Figure 3 ;

[0037] Figure 5 This is a schematic diagram of the principle of an ultrasonic hydrophone according to an embodiment of the present application.

[0038] The reference numerals in the above drawings are described as follows:

[0039] 100-ultrasonic hydrophone; 200-detection pipeline; 300-fixing part; 1-inner shell; 11-first sealing glue; 2-cover assembly; 21-front cover; 22-rear cover; 3-piezoelectric ceramic; 4-circuit board; 5-cable assembly; 51-four-core shielded cable; 52-two-core cable; 6-upper cover; 7-outer shell; 71-second sealing glue; 8-elastic part; 9-magnetic ring. DETAILED DESCRIPTION

[0040] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0041] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0042] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0043] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0044] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.

[0045] Without further limitations, in this application, the words "include", "comprise", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.

[0046] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this manner, such as "multiple groups," "multiple times," etc., unless otherwise specifically defined.

[0047] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.

[0048] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0049] According to some embodiments of the present application, this embodiment relates to a noise detection device and a host computer, including an ultrasonic hydrophone 100, which is used to be installed on a detection pipe 200; the output end of a four-core shielded cable 51 is connected to the host computer.

[0050] The upper computer 101 is a computer that can directly issue control commands, generally a PC / host computer / master computer / upper computer, and displays various signal changes (hydraulic pressure, water level, temperature, etc.) on the screen. Among them, the upper computer 101 adopts RS485 serial communication.

[0051] The ultrasonic hydrophone 100 of the technical solution of the present application transmits the detected signal to the host computer through the four-core shielded cable 51, and presents an intuitive signal waveform on the host computer through RS485 communication, which can better collect and store data for a long time.

[0052] According to some embodiments of the present application, optionally, Figure 1 As shown, the noise detection device further includes two or more fixing members 300 , two ultrasonic hydrophones 100 are provided, one ultrasonic hydrophone 100 corresponds to at least one fixing member 300 , and the two ultrasonic hydrophones 100 are installed on the detection pipe 200 at intervals through the fixing members 300 .

[0053] When the detection pipe 200 is an iron pipe or other metal pipe, the ultrasonic hydrophone 100 can be directly magnetically attracted to the detection pipe 200 via the magnetic ring 9. Alternatively, the ultrasonic hydrophone 100 can be further secured to the detection pipe 200 using the fixing member 300 after magnetic attraction. If the detection pipe 200 is a PVC pipe, the ultrasonic hydrophone 100 must be secured to the PVC pipe using the fixing member 300.

[0054] Thus, the ultrasonic hydrophone 100 can be mounted on the detection pipe 200 by providing the fixing member 300. In actual use, the location of the liquid leakage source is calculated based on the time it takes for two ultrasonic hydrophones at a certain distance to capture the noise signal generated by the liquid flow in the detection pipe 200.

[0055] According to some embodiments of the present application, optionally, Figure 1 As shown, the fixing member 300 is a clamp or a pipe clamp.

[0056] Thus, the fixing member 300 is configured as a clamp or a pipe clamp, which simplifies the structure. When the fixing member 300 is a clamp, both sides of the ultrasonic hydrophone 100 are mounted on the detection pipe 200 through the clamps.

[0057] According to some embodiments of this application, please refer to Figures 2 to 5This embodiment also relates to an ultrasonic hydrophone 100, comprising an inner shell 1, a cover assembly 2, a piezoelectric ceramic 3, a circuit board 4 and a cable assembly 5, wherein the lower end of the inner shell 1 is open; the cover assembly 2 comprises a front cover 21 and a rear cover 22, the front cover 21 is connected to the inner shell 1 through an opening, and the rear cover 22 is arranged in the inner shell 1; the piezoelectric ceramic 3 is arranged in the inner shell 1 and is located between the front cover 21 and the rear cover 22; the circuit board 4 is arranged in the inner shell 1 and above the rear cover 22, and the circuit board 4 and the piezoelectric ceramic 3 are isolated from each other by a first sealing glue 11; the cable assembly 5 comprises a four-core shielded cable 51 and a two-core cable 52, the input end of the four-core shielded cable 51 is connected to the circuit board 4, and the output end of the four-core shielded cable 51 is used to connect to the host computer, the input end of the two-core cable 52 is connected to the piezoelectric ceramic 3, and the output end of the two-core cable 52 is connected to the circuit board 4.

[0058] The inner shell 1 can have an IP68 protection grade. The inner shell 1 is hollow and can hold various components.

[0059] like Figure 5 As shown, the three piezoelectric ceramics utilize new piezoelectric ceramics with higher sensitivity and faster response. The collected signals are amplified by the circuit board 4 and then output in two ways: The first is processed at high speed by a 32-bit MCU, and then presented to the host computer via RS485 communication as an intuitive signal waveform. This allows for long-term data collection and storage, facilitating research and analysis. The second is amplified by 10x and 100x, allowing for collection and analysis based on the original analog signal, facilitating research and judgment.

[0060] Circuit board 4 includes an amplifier circuit, an MCU processing module, and an RS485 communication module. The amplifier circuit is used to amplify the received signal. An MCU (Microcontroller Unit), also known as a single-chip microcomputer or single-chip microcomputer, is a CPU (Central Processing Unit) with a reduced frequency and specifications. It integrates memory, timers, USB, A / D converters, UARTs, PLCs, DMA, and other peripheral interfaces, as well as LCD driver circuits, onto a single chip, forming a chip-level computer capable of providing diverse control combinations for different applications.

[0061] Four-core shielded cable 51 is a transmission line that uses a metal mesh braid to encase the signal line. The encased conductor is called the shield, typically made of braided copper mesh or copper foil (aluminum). The shield needs to be grounded, directing any external interference signals to the earth. Four-core shielded cable 51 is a conductor with a metal braided sheath specifically designed to reduce the impact of external electromagnetic fields on power or communication lines, and also prevent the line from radiating electromagnetic energy.

[0062] The two-core cable 52 is welded to the piezoelectric ceramic 3 and then connected to the circuit board 4 .

[0063] The technical solution of this application utilizes piezoelectric ceramics 3. Due to their higher sensitivity, the ultrasonic hydrophone 100 can capture signals simply by mounting it directly on the pipe, regardless of installation conditions. Specifically, the piezoelectric ceramics 3 receive the signal and transmit it to the circuit board 4 via a two-core cable 52. The circuit board 4 then amplifies the signal and transmits it to the host computer via a four-core shielded cable 51. The host computer then analyzes and calculates the location of the liquid leak source.

[0064] According to some embodiments of the present application, optionally, Figures 2 to 4 As shown, the ultrasonic hydrophone 100 further includes an upper cover 6 , which is disposed in the inner shell 1 and located above the circuit board 4 . The input end of the four-core shielded cable 51 passes through the upper cover 6 and the first sealing glue 11 in sequence and is connected to the circuit board 4 .

[0065] Thus, the upper cover 6 is provided to facilitate fixing the four-core shielded cable 51. Therefore, preferably, the upper cover 6 is provided and installed on the top of the inner shell 1.

[0066] According to some embodiments of the present application, optionally, Figure 3 and Figure 4 As shown, the ultrasonic hydrophone 100 further includes an outer shell 7 , which is sleeved on the outer shell 1 . The outer shell 7 and the inner shell 1 are sealed by a second sealing glue 71 , and the lower end of the front cover 21 protrudes from the outer shell 7 .

[0067] The outer shell 7 can be IP68 protection grade. Thus, by providing the outer shell 7 and the second sealant 71 provided between the outer shell 7 and the inner shell 1, the second sealant 71 can play a waterproof role and further protect the inner components of the inner shell 1.

[0068] According to some embodiments of the present application, optionally, Figures 2 to 4 As shown, the ultrasonic hydrophone 100 further includes an elastic member 8 , one end of the elastic member 8 is connected to the top of the inner shell 1 , and the other end of the elastic member 8 is connected to the top of the interior of the outer shell 7 .

[0069] Elastic member 8 is elastic, contracting when subjected to pressure and returning to its original shape when the pressure is relieved. Elastic member 8 can be made of a metallic elastic material, such as a metal spring, or a non-metallic elastic material, such as rubber or silicone. The input end of the four-core shielded cable 51 passes through the housing 7, elastic member 8, upper cover 6, and first sealant 11, before connecting to the circuit board 4.

[0070] In this way, by providing the elastic member 8 , the front cover plate 21 can better receive the signal generated on the pipe wall due to the flow of liquid in the detection pipe 200 .

[0071] According to some embodiments of the present application, optionally, Figure 4 As shown, the ultrasonic hydrophone 100 further includes a magnetic ring 9 , which is installed at the bottom of the interior of the housing 7 .

[0072] The magnetic ring 9 has good magnetic properties and can be magnetically attracted to the metal pipe. In this way, the ultrasonic hydrophone 100 can be magnetically mounted on the detection pipe 200 by arranging the magnetic ring 9 .

[0073] According to some embodiments of the present application, optionally, the first sealing glue 11 and the second sealing glue 71 are both polyurethane potting glue.

[0074] Thus, the polyurethane potting compound has good waterproof performance.

[0075] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An ultrasonic hydrophone, characterized in that: include: an inner shell, wherein the lower end of the inner shell is open; a cover plate assembly, the cover plate assembly comprising a front cover plate and a rear cover plate, the front cover plate being connected to the inner shell through the opening, and the rear cover plate being disposed within the inner shell; a piezoelectric ceramic, the piezoelectric ceramic being disposed in the inner shell and located between the front cover and the rear cover; A circuit board is disposed in the inner shell and above the rear cover, and the circuit board is isolated from the piezoelectric ceramic by a first sealing glue; A cable assembly, the cable assembly comprising a four-core shielded cable and a two-core cable, the input end of the four-core shielded cable being connected to the circuit board, the output end of the four-core shielded cable being used to be connected to a host computer, the input end of the two-core cable being connected to the piezoelectric ceramic, and the output end of the two-core cable being connected to the circuit board.

2. The ultrasonic hydrophone according to claim 1, wherein: The ultrasonic hydrophone further includes an upper cover, which is arranged in the inner shell and located above the circuit board. The input end of the four-core shielded cable passes through the upper cover and the first sealing glue in sequence and is connected to the circuit board.

3. The ultrasonic hydrophone according to claim 1, wherein: The ultrasonic hydrophone further includes an outer shell, which is sleeved outside the inner shell. The outer shell and the inner shell are sealed by a second sealing glue, and the lower end of the front cover protrudes from the outer shell.

4. The ultrasonic hydrophone according to claim 3, characterized in that The ultrasonic hydrophone further includes an elastic member, one end of which is connected to the top of the inner shell, and the other end of which is connected to the top of the inner portion of the outer shell.

5. The ultrasonic hydrophone according to claim 3, characterized in that The ultrasonic hydrophone further includes a magnetic ring installed at the bottom of the interior of the housing.

6. The ultrasonic hydrophone according to claim 3, characterized in that The first sealing glue and the second sealing glue are both polyurethane potting glue.

7. A noise detection device, characterized in that: include: The ultrasonic hydrophone according to any one of claims 1 to 6, wherein the ultrasonic hydrophone is used to be installed on a detection pipe; A host computer, the output end of the four-core shielded cable is connected to the host computer.

8. The noise detection device according to claim 7, characterized in that The noise detection device further includes two or more fixing parts. Two ultrasonic hydrophones are provided. One ultrasonic hydrophone corresponds to at least one fixing part. The two ultrasonic hydrophones are installed on the detection pipe at intervals through the fixing parts.

9. The noise detection device according to claim 8, characterized in that The fixing piece is a clamp or a pipe clamp.

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