Acoustic signal acquisition device suitable for non-contact acoustic emission sensor

Abstract

The utility model discloses an acoustic signal acquisition device suitable for a non-contact acoustic emission sensor, and relates to the technical field of mechanical engineering. Comprising a collecting cover and acoustic signal sensors arranged on the collecting cover in an annular array mode, and further comprises a limiting assembly, the outer wall of the limiting assembly is fixedly connected with the outer wall of the collecting cover, and the bottom of the limiting assembly is fixedly connected with a damping assembly; according to the collection device, the structural design of the fixing base, the limiting frame, the locking bolt and the locking nut is adopted through the limiting assembly, installation can be completed without complex tools, the collection device is suitable for on-site rapid deployment, the limiting frame can be finely adjusted in the axial direction of the locking bolt, and the collection device is convenient to install and maintain. By loosening and re-locking the locking nut, the acquisition device achieves the purpose of the acoustic signal acquisition device suitable for the non-contact acoustic emission sensor.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, specifically to an acoustic signal acquisition device suitable for non-contact acoustic emission sensors. Background Technology

[0002] In modern industrial production and equipment monitoring, non-contact acoustic emission sensors play a crucial role in numerous scenarios due to their characteristic of not requiring direct contact with the monitored object. For example, in aerospace for health monitoring of aircraft structures, in industrial manufacturing for fault detection of pressure vessels and pipelines, and in geological exploration for monitoring phenomena such as rock fractures, acoustic emission signals contain rich information about the equipment's operating status. Accurately acquiring these signals is critical for timely detection of potential problems, prevention of equipment failures, and ensuring production safety.

[0003] However, existing non-contact acoustic emission sensor acoustic signal acquisition devices have some problems that need to be solved in practical applications. The installation process of traditional acquisition devices is often cumbersome, requiring the use of a variety of complex tools and complicated installation steps, which consumes a lot of time and manpower. This not only increases the installation cost, but also fails to meet the actual needs in some scenarios that require rapid deployment of monitoring equipment, such as equipment testing at emergency accident sites and safety monitoring of temporary projects. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an acoustic signal acquisition device suitable for non-contact acoustic emission sensors, which solves the problem that the installation process of traditional acquisition devices is often cumbersome, requires the use of various complex tools, and involves complicated installation steps, consuming a lot of time and manpower.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sound signal acquisition device suitable for non-contact acoustic emission sensors, comprising: a collection cover and a sound signal sensor arranged in a ring array on the collection cover, and further comprising a limiting component, the outer wall of the limiting component being fixedly connected to the outer wall of the collection cover, and a shock-absorbing component being fixedly connected to the bottom of the limiting component; the shock-absorbing component comprising a mounting base, a top column being fixedly connected to the corners around the mounting base, an airbag being fixedly connected to the top of the top column, the airbag being made of a wear-resistant material, and a fixing shell being fixedly connected to the outer wall of the airbag.

[0008] Preferably, the limiting component includes a fixed base, a locking bolt inserted into the inner wall of the fixed base, a limiting frame inserted into the outer wall of the locking bolt, locking nuts threadedly connected to the outer walls of both sides of the limiting frame, the locking nuts being used to limit the position between the limiting frame and the fixed base, and a fixing plate fixedly connected to the bottom of the limiting frame.

[0009] Preferably, the outer wall of the fixing seat is pressed and fixed to the outer wall of the limiting frame, and the outer wall of the collecting cover is fixedly connected to the outer wall of the fixing seat.

[0010] Preferably, the outer wall of the limiting frame is pressed and fixed to the outer wall of the locking nut, the inner wall of the collecting cover is fixedly installed to the outer wall of the acoustic signal sensor, and the bottom of the fixing plate is fixedly connected to the top of the fixing shell.

[0011] (III) Beneficial Effects

[0012] This invention provides an acoustic signal acquisition device suitable for non-contact acoustic emission sensors. It has the following advantages:

[0013] (I) This acoustic signal acquisition device for non-contact acoustic emission sensors adopts a structural design of fixed base, limit frame, locking bolt and locking nut through the limiting component. It can be installed without complicated tools and is suitable for rapid on-site deployment. Moreover, the limit frame can be finely adjusted along the axial direction of the locking bolt. By loosening and re-tightening the locking nut, the limit frame can be rotated to adjust the orientation of the collection cover to optimize the acoustic signal acquisition angle. This design is particularly suitable for scenarios that require frequent adjustment of the monitoring position. It can flexibly adjust the position and angle of the collection cover according to different monitoring needs, thereby improving the applicability and flexibility of the device.

[0014] (II) This acoustic signal acquisition device, applicable to non-contact acoustic emission sensors, utilizes the combination of an airbag and a top column in its shock-absorbing component to create a dual shock absorption effect of "airbag buffering - top column rigid support." When the device is subjected to external vibration, the airbag absorbs vibration energy through compression deformation, reducing the transmission of vibration to the collection hood. The top column further suppresses residual vibration. Simultaneously, the elastic properties of the airbag create a flexible connection between the device and the mounting surface, blocking the solid-borne sound transmission path and preventing external vibration from directly interfering with the vibration pickup accuracy of the acoustic signal sensor. In industrial environments and other scenarios with significant vibration interference, it effectively reduces the sensor's own vibration noise caused by environmental vibration, improves the signal-to-noise ratio, ensures the acoustic signal sensor operates in a stable environment, and enhances the quality of acoustic signal acquisition. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the limiting component of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the shock absorption component of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the airbag of this utility model.

[0019] In the diagram: 1. Collection cover; 2. Acoustic signal sensor; 3. Limiting component; 4. Shock absorption component; 31. Fixing base; 32. Limiting frame; 33. Locking nut; 34. Locking bolt; 35. Fixing plate; 41. Top column; 42. Fixing shell; 43. Mounting base; 44. Airbag. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides a technical solution: an acoustic signal acquisition device suitable for non-contact acoustic emission sensors, comprising: a collection cover 1 and acoustic signal sensors 2 arranged in a ring array on the collection cover 1, and a limiting component 3, the outer wall of the limiting component 3 being fixedly connected to the outer wall of the collection cover 1, and a shock-absorbing component 4 being fixedly connected to the bottom of the limiting component 3; the shock-absorbing component 4 includes a mounting base 43, a top column 41 being fixedly connected to the corners around the mounting base 43, an airbag 44 being fixedly connected to the top of the top column 41, and a fixed shell 42 being fixedly connected to the outer wall of the airbag 44. Vibration energy is first transmitted to the airbag 44 through the fixed shell 42, and the gas or elastic medium inside the airbag 44 absorbs the vibration energy through compression and deformation, reducing the transmission of vibration to the collection cover 1.

[0022] The limiting component 3 includes a fixed base 31, a locking bolt 34 is inserted into the inner wall of the fixed base 31, a limiting frame 32 is inserted into the outer wall of the locking bolt 34, locking nuts 33 are threaded to the outer walls on both sides of the limiting frame 32, and a fixing plate 35 is fixedly connected to the bottom of the limiting frame 32.

[0023] The outer wall of the fixed base 31 is pressed and fixed to the outer wall of the limiting frame 32. The outer wall of the collection cover 1 is fixedly connected to the outer wall of the fixed base 31. The outer wall of the limiting frame 32 is pressed and fixed to the outer wall of the locking nut 33. The inner wall of the collection cover 1 is fixedly installed to the outer wall of the sound signal sensor 2. The bottom of the fixing plate 35 is fixedly connected to the top of the fixing shell 42. During installation, the inner wall of the limiting frame 32 is aligned with the locking bolt 34 and inserted into the fixed base 31. Then, the locking nuts 33 on both sides are rotated to make the limiting frame 32 and the fixed base 31 press tightly together, thereby fixing the collection cover 1 in the target position.

[0024] The device mainly consists of a collection hood 1, acoustic signal sensors 2, a limiting component 3, and a shock-absorbing component 4. These components work together to improve the accuracy and stability of acoustic signal acquisition. The collection hood 1 serves as the acoustic signal gathering unit, with acoustic signal sensors 2 arranged in a ring array on its inner wall, allowing for omnidirectional reception of acoustic emission signals from the target object. The limiting component 3 is fixedly connected to the outer wall of the collection hood 1 via a fixing base 31, and its bottom is connected to the fixing shell 42 of the shock-absorbing component 4, forming a three-stage support structure of "device-limiting-shock absorption". The airbag 44 of the shock-absorbing component 4, in conjunction with the top column 41, provides buffering and shock absorption for the entire device, ensuring that the acoustic signal sensors 2 operate in a stable environment.

[0025] The fixing seat 31 of the limiting component 3 is tightly attached to the outer wall of the collection cover 1 and is connected to the limiting frame 32 by locking bolts 34. During installation, the inner wall of the limiting frame 32 is aligned with the locking bolts 34 and inserted into the fixing seat 31. Then, the locking nuts 33 on both sides are rotated to make the limiting frame 32 and the fixing seat 31 tightly pressed together, thereby fixing the collection cover 1 in the target position. This design can be installed without complicated tools, is suitable for rapid on-site deployment, and is especially suitable for scenarios that require frequent adjustment of the monitoring position.

[0026] The bottom fixing plate 35 of the limiting frame 32 is fixedly connected to the fixing shell 42 of the shock absorption assembly 4, and the limiting frame 32 can be finely adjusted along the axial direction of the locking bolt 34. When it is necessary to adjust the orientation of the collecting cover 1 to optimize the acoustic signal acquisition angle, simply loosen the locking nut 33, rotate the limiting frame 32 to the appropriate position, and then tighten it again. For example, when monitoring the acoustic emission signal of a pipe crack, the limiting frame 32 can be adjusted to make the axis of the collecting cover 1 perpendicular to the pipe axis, ensuring that the acoustic signal sensor 2 is directly facing the crack location, thus improving the targeting of signal acquisition.

[0027] The top columns 41 of the shock-absorbing component 4 are distributed around the corners of the mounting base 43, and are fixedly connected to the airbag 44 at the top. The airbag 44 is wrapped by a fixed shell 42. When the device is subjected to external vibration (such as high-frequency vibration during the operation of mechanical equipment), the vibration energy is first transmitted to the airbag 44 through the fixed shell 42. The gas or elastic medium inside the airbag 44 absorbs the vibration energy through compression and deformation, reducing the transmission of vibration to the collection hood 1. The top columns 41 are made of rigid material, which can further suppress residual vibration after the airbag 44 has buffered it, forming a dual shock-absorbing effect of "airbag buffering - top column rigid support".

[0028] Mounting base 43 is connected to the bottom of limiting frame 32 via fixing plate 35, evenly distributing the weight of collection cover 1 to each top column 41 of shock absorption assembly 4. The elasticity of airbag 44 creates a flexible connection between the device and the mounting surface, blocking the solid-borne sound transmission path and preventing external vibrations from directly interfering with the vibration pickup accuracy of sound signal sensor 2. For example, in an industrial environment, when the mechanical vibration of equipment is transmitted to mounting base 43 through the ground, the compression and rebound of airbag 44 can consume vibration energy, reducing the vibration amplitude of collection cover 1 and ensuring that the signal captured by sound signal sensor 2 mainly comes from the acoustic emission of the target object, rather than environmental interference.

[0029] The ring-array acoustic signal sensors 2 cover the circumferential space of the collection hood 1, enabling simultaneous acquisition of acoustic signals from different directions and locating the sound source direction through signal processing algorithms. The rigid structure of the limiting component 3 ensures that the collection hood 1 maintains a fixed posture in a vibration environment, avoiding phase deviation of the acoustic signal due to positional shift; the vibration damping component 4 reduces the vibration noise of the sensor itself caused by environmental vibration, improving the signal-to-noise ratio. For example, when monitoring the acoustic emission signal of a pressure vessel, the device is fixed to the outer wall of the vessel by the limiting component, the vibration damping component suppresses vibration interference during vessel operation, and the acoustic signal sensors 2 accurately capture the weak acoustic signals generated by the propagation of internal cracks, providing reliable data for equipment safety assessment.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An acoustic signal acquisition device suitable for use with a non-contact acoustic emission sensor, comprising: The collecting cover (1) and the acoustic signal sensor (2) arranged in an annular array on the collecting cover (1) are characterized in that a limiting assembly (3) is further included, an outer wall of the limiting assembly (3) is fixedly connected with an outer wall of the collecting cover (1), and a bottom of the limiting assembly (3) is fixedly connected with a damping assembly (4). The damping assembly (4) comprises a mounting seat (43), corners around the mounting seat (43) are fixedly connected with jacks (41), top portions of the jacks (41) are fixedly connected with air bags (44), and outer walls of the air bags (44) are fixedly connected with fixed shells (42).

2. The acoustic signal acquisition device for a non-contact acoustic emission sensor according to claim 1, characterized in that: The limiting assembly (3) comprises a fixed seat (31), an inner wall of the fixed seat (31) is inserted with a locking bolt (34), an outer wall of the locking bolt (34) is inserted with a limiting frame (32), outer walls of both sides of the limiting frame (32) are threadedly connected with locking nuts (33), and a bottom of the limiting frame (32) is fixedly connected with a fixed plate (35).

3. The acoustic signal acquisition device for a non-contact acoustic emission sensor according to claim 2, characterized in that: An outer wall of the fixed seat (31) is press-fitted with an outer wall of the limiting frame (32), and an outer wall of the collecting cover (1) is fixedly connected with an outer wall of the fixed seat (31).

4. The acoustic signal acquisition device for a non-contact acoustic emission sensor according to claim 2, characterized in that: An outer wall of the limiting frame (32) is press-fitted with an outer wall of the locking nut (33), and an inner wall of the collecting cover (1) is fixedly installed with an outer wall of the acoustic signal sensor (2).

5. The acoustic signal acquisition device for a non-contact acoustic emission sensor according to claim 2, characterized in that: A bottom of the fixed plate (35) is fixedly connected with a top of the fixed shell (42).

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