Handheld acoustic imaging instrument with magnetic fast release soundproof cover

Abstract

The utility model discloses a handheld acoustic imaging appearance of quick release formula sound shield with magnetic attraction. It includes acoustic imaging appearance body and microphone shell, is equipped with a detachable tubular sound shield in the microphone shell front. The sound shield is made of flexible sound insulation material, and its inner diameter is adapted to the contour of the microphone shell, and is detachably connected with the microphone shell through a quick release connection mechanism. The magnetic attraction mechanism includes a plurality of first magnets provided on the imaging instrument shell and second magnets provided on the rear end edge of the sound shield, and the two are attracted to each other to achieve quick installation and disassembly. The inner wall of the sound shield can also be attached to a porous sound-absorbing material layer to reduce sound reflection. The utility model can effectively isolate lateral and rear environmental noise, significantly improve the detection signal-to-noise ratio and imaging clarity, the magnetic attraction quick release structure is convenient to operate, does not need tools, and greatly improves the flexibility and efficiency of on-site detection in complex noise.

Description

Technical Field

[0001] This utility model belongs to the technical field of acoustic infrared imager structure, and particularly relates to a handheld acoustic imager with a magnetic quick-release soundproof cover. Background Technology

[0002] Handheld acoustic imagers acquire sound signals through microphone arrays and process them using beamforming algorithms to visually present the location of the sound source in image form. They are widely used in fields such as gas leak detection, abnormal noise location, and equipment status monitoring. However, in actual field applications, ambient background noise (such as wind noise, distant traffic noise, and factory environmental noise) can severely interfere with the microphone array's acquisition of the target sound source, leading to problems such as decreased imaging signal-to-noise ratio, inaccurate positioning, and inability to identify weak signals.

[0003] Most current acoustic imaging devices are used directly exposed to the environment. Although algorithms perform some filtering, there is a lack of effective physical noise isolation. Some attempts to add soundproof enclosures also suffer from problems such as cumbersome installation and removal, poor versatility, and reduced portability, making it difficult to meet the needs of rapid and flexible on-site testing. Utility Model Content

[0004] The purpose of this invention is to provide a handheld acoustic imaging device with a magnetic quick-release soundproof cover to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the specific technical solution of this utility model for a handheld acoustic imaging device with a magnetic quick-release soundproof cover is as follows: A handheld acoustic imager with a magnetic quick-release soundproof cover includes an acoustic imager body and a microphone housing. A detachable cylindrical soundproof cover is provided in front of the microphone housing. The soundproof cover is made of sound-insulating material, is hollow inside, and its inner diameter is adapted to the contour of the microphone housing. The soundproof cover is detachably connected to the microphone housing through a magnetic quick-release connection mechanism.

[0006] Furthermore, the magnetic quick-release connection mechanism includes a second magnet disposed at the edge of the rear opening of the soundproof cover, and a plurality of first magnets disposed on the housing at the corresponding position of the acoustic imaging device body; the first magnet and the second magnet attract each other to achieve connection.

[0007] Furthermore, the first magnet is a neodymium magnet; the second magnet is a flexible soft magnet.

[0008] Furthermore, there are multiple first magnets, which are evenly distributed around the microphone array.

[0009] Furthermore, the inner wall of the soundproof cover is coated with a layer of sound-absorbing material to reduce the reflection of sound waves inside the pipe.

[0010] Furthermore, the sound-absorbing material layer is a porous material.

[0011] Furthermore, the sound insulation material is a flexible sound insulation material.

[0012] Furthermore, the length L of the soundproof cover is twice its inner diameter D.

[0013] The handheld acoustic imaging device with a magnetic quick-release soundproof cover of this utility model has the following advantages: (1) Significantly improves signal-to-noise ratio: The cylindrical soundproof cover physically isolates the ambient noise from the side and rear, forcing the microphone array to mainly receive the sound from the front of the tube opening, greatly reducing interference and making the imaging of the target sound source clearer and more accurate.

[0014] (2) Extremely convenient operation: The magnetic quick-release design allows users to complete the installation or disassembly in 1-2 seconds without using any tools, perfectly meeting the needs of handheld devices that require frequent use and movement.

[0015] (3) Protective equipment: When in use, this structure can also prevent the microphone array from being accidentally bumped or knocked. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model after the soundproof cover is assembled; Figure 2 This is an axial cross-sectional view of the soundproof enclosure structural component; Figure 3 This is a magnified view of the magnetic connection between the soundproof cover and the imaging device.

[0017] The markings in the diagram are as follows: 1. Screen; 2. Grip; 3. Soundproof cover; 4. Microphone housing; 5. First magnet; 6. Second magnet; 7. Camera. Detailed Implementation

[0018] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a handheld acoustic imaging device with a magnetic quick-release soundproof cover.

[0019] like Figures 1 to 3 As shown, the present invention provides a handheld acoustic imaging device with a magnetic quick-release soundproof cover, which mainly includes two core parts: the acoustic imaging device body and the detachable soundproof cover 3.

[0020] The acoustic imaging device body is a prior art device, typically including a housing, a screen 1 disposed on the front of the housing, a handle 2 for easy gripping, a microphone housing 4 located at the front of the housing (the microphone housing 4 contains a microphone array), and a camera 7 for auxiliary positioning. The improvement of this utility model lies in the microphone array area at its front end.

[0021] The soundproof enclosure 3 is a cylindrical structure with an opening at the front and an opening at the rear. Its core function is to provide a physical acoustic barrier for the microphone array.

[0022] The main body of the soundproof enclosure 3 is made of flexible sound-insulating material, preferably high-density polyurethane foam, rubber, or silicone. These materials have excellent sound wave damping characteristics, effectively absorbing and blocking mid-to-high frequency environmental noise from the sides and rear. Choosing flexible materials reduces the overall weight and also acts as a buffer when the equipment is subjected to minor bumps, protecting the microphone array.

[0023] The inner diameter D of the soundproof enclosure 3 is slightly larger than the maximum outer dimension of the microphone housing 4, ensuring that it can be easily fitted onto the outside of this area without the inner wall interfering with the microphone housing 4. The length L of the soundproof enclosure 3 is a key parameter. Experiments have shown that when the length L is twice its inner diameter D, the best balance can be achieved between ensuring good lateral noise isolation and equipment portability (avoiding inconvenience due to excessive length).

[0024] To further optimize the acoustic environment inside the enclosure and reduce standing wave interference caused by multiple reflections of sound waves within the pipe, a layer of sound-absorbing material (not shown separately in the figure) is tightly adhered to the inner wall of the soundproof enclosure 3. This sound-absorbing material layer is preferably a porous material, such as black sound-absorbing cotton or velvet, whose acoustic impedance matches that of the main material of the soundproof enclosure, maximizing the absorption of transmitted residual sound energy.

[0025] The soundproof cover 3 is quickly attached to and detached from the microphone housing 4 via a magnetic quick-release connection mechanism. The specific structure of the magnetic quick-release connection mechanism is as follows: A plurality of first magnets 5 are uniformly embedded around the microphone housing 4 (or at the corresponding location on the housing) in a manner that surrounds the microphone array. The first magnets 5 are preferably high-performance permanent magnets, such as neodymium iron boron magnets, to ensure sufficient attraction force. In this embodiment, four rectangular or disc-shaped neodymium magnets are used, symmetrically distributed.

[0026] At the rear opening edge of the soundproof enclosure 3, a ring-shaped second magnet 6 is fixed by overmolding or embedding. The second magnet 6 is preferably a flexible soft magnet (such as a rubber magnet) or a magnetic ring made of magnetic stainless steel. This design allows the mounting end of the soundproof enclosure 3 to have a certain degree of deformation capability, enabling it to better fit the curved surface of the imager body shell and ensuring tight adhesion and airtightness.

[0027] The positions and polarities of the first magnet 5 and the second magnet 6 are precisely designed to ensure that they automatically align and generate a strong magnetic force when brought close together. When the user brings the open end of the soundproof cover 3 close to the microphone housing 4, the magnetic force guides the soundproof cover 3 to automatically return to its position and quickly snap into place. This process requires no tools and usually takes only 1-2 seconds. For disassembly, the user simply holds the soundproof cover 3 and applies a pulling force slightly greater than the magnetic force along the axial direction to easily pull it off, which is equally quick and damage-free.

[0028] In quiet laboratories or environments with low background noise, users can directly use the acoustic imager for testing without installing the soundproof cover 3, thus achieving the widest field of view and flexibility. When entering noisy environments such as factory workshops or outdoor vents, users can take the soundproof cover 3 out of the carrying case, align it with the microphone housing 4, and instantly install it using magnetic attraction. At this time, the tubular structure of the soundproof cover 3 will effectively shield most of the ambient noise from the sides and rear, forcing the microphone array to primarily receive sound from directly in front of the tube opening, thereby greatly improving the signal-to-noise ratio of the target sound source signal. After testing, users can easily remove the soundproof cover 3 and store it together with the imager body, which is extremely convenient.

[0029] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A handheld acoustic imaging device with a magnetic quick-release soundproof cover, comprising an acoustic imaging device body and a microphone housing (4), characterized in that: A detachable cylindrical soundproof cover (3) is provided in front of the microphone housing (4). The soundproof cover (3) is made of soundproof material, hollow inside, and its inner diameter is adapted to the contour of the microphone housing (4). The soundproof cover (3) is detachably connected to the microphone housing (4) by a magnetic quick-release connection mechanism.

2. The handheld acoustic imaging device with a magnetic quick-release soundproof cover according to claim 1, characterized in that: The magnetic quick-release connection mechanism includes a second magnet (6) disposed at the edge of the rear opening of the soundproof cover (3), and a plurality of first magnets (5) disposed on the housing at the corresponding position of the acoustic imaging device body; the first magnets (5) and the second magnets (6) attract each other to achieve connection.

3. A handheld acoustic imaging device with a magnetic quick-release soundproof cover according to claim 2, characterized in that: The first magnet (5) is a neodymium magnet; the second magnet (6) is a flexible soft magnet.

4. A handheld acoustic imaging device with a magnetic quick-release soundproof cover according to claim 2, characterized in that: The number of the first magnets (5) is multiple and they are evenly distributed around the microphone array.

5. A handheld acoustic imaging device with a magnetic quick-release soundproof cover according to claim 1, characterized in that: The inner wall of the soundproof cover (3) is attached with a layer of sound-absorbing material to reduce the reflection of sound waves in the pipe.

6. A handheld acoustic imaging device with a magnetic quick-release soundproof cover according to claim 5, characterized in that: The sound-absorbing material layer is a porous material.

7. A handheld acoustic imaging device with a magnetic quick-release soundproof cover according to claim 1, characterized in that: The sound insulation material is a flexible sound insulation material.

8. A handheld acoustic imaging device with a magnetic quick-release soundproof cover according to claim 1, characterized in that: The length L of the soundproof cover (3) is twice its inner diameter D.

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