A high-precision sound holography multi-dimensional monitoring device based on multi-channel acquisition

Abstract

The utility model relates to a kind of high-precision acoustic holography multidimensional monitoring device based on multichannel acquisition, belong to acoustic holography multidimensional monitoring device technical field, including box, frame body and bottom plate respectively fixedly connected in the left and right sides of box, fixedly connected between the bottom of left and right frame body, the inside of box is equipped with monitoring component for monitoring, the monitoring component includes motor fixedly connected in the inner top wall of box, the output shaft of motor is fixedly connected with rotating rod, the bottom of rotating rod is fixedly connected with connecting disc, the left and right sides of connecting disc top are all fixedly connected with electric push rod. The high-precision acoustic holography multidimensional monitoring device based on multichannel acquisition, by setting switchable small-aperture microphone array and large-aperture microphone array, and by electric push rod drive selection extension, small-aperture array is suitable for accurate positioning of high-frequency sound wave, large-aperture array is suitable for effective capture of low-frequency sound wave.

Description

Technical Field

[0001] This utility model relates to the technical field of acoustic holographic multidimensional monitoring devices, specifically a high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition. Background Technology

[0002] In fields such as industrial manufacturing, equipment condition monitoring, noise control, and abnormal noise localization, acoustic imaging and acoustic holography are becoming increasingly important as a non-contact, visual means of fault diagnosis and noise assessment.

[0003] Acoustic measurement devices typically employ a single microphone array for data acquisition, which has significant limitations: a single-aperture array cannot simultaneously achieve high-resolution localization of high-frequency signals and high-precision measurement of low-frequency signals, thus limiting its application scenarios; during measurement, factors such as the distance between the array and the target, and ambient temperature and humidity directly affect the accuracy of sound velocity calculation, thereby introducing significant measurement errors; furthermore, complex background noise in the environment can easily interfere with the measured sound source signal, reducing the signal-to-noise ratio. Therefore, a high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition is proposed to address the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition, which has advantages such as high-precision monitoring and solves the problems mentioned in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition includes a housing, frames fixedly connected to the left and right sides of the housing, and a base plate fixedly connected between the bottoms of the left and right frames. The inner side of the housing is provided with monitoring components for monitoring.

[0007] The monitoring component includes a motor fixedly connected to the top wall of the housing. The output shaft of the motor is fixedly connected to a rotating rod. The bottom end of the rotating rod is fixedly connected to a connecting plate. Electric push rods are fixedly connected to the left and right sides of the top of the connecting plate. A small-aperture microphone array is fixedly connected to one end of the movable rod of the electric push rod on the left side, and a large-aperture microphone array is fixedly connected to one end of the movable rod of the electric push rod on the right side.

[0008] Furthermore, an array opening is provided on the top of the inner side of the box, and the array opening is located on the right side of the top of the box.

[0009] Furthermore, a ball bearing is provided at the center of the bottom of the connecting plate, and the ball bearing is in contact with the inner bottom wall of the housing.

[0010] Furthermore, a laser rangefinder and a high-definition camera are fixedly connected to the right side of the enclosure, and a temperature sensor and two reference microphones are fixedly connected to the left side of the enclosure.

[0011] Furthermore, a threaded rod is rotatably connected to the inner bottom wall of the frame, a threaded block is threadedly connected to the outer side of the threaded rod, a fixing plate is fixedly connected to both the front and rear sides of the threaded block, a fixing block is fixedly connected between the opposite sides of the fixing plates on the front and rear sides, a connecting plate is fixedly connected to the bottom of the fixing block, and two movable wheels are fixedly connected to the bottom of the connecting plate.

[0012] Furthermore, a torsion cap is fixedly connected to the top of the threaded rod, a guide channel is provided on the inner side of the fixing block, and a guide rod is slidably connected to the inner side of the guide channel. The bottom end of the guide rod is fixedly connected to the base plate.

[0013] Furthermore, the inner side of the connecting plate is provided with an opening that is adapted to the guide rod and communicates with the guide channel, and the guide rod is slidably connected to the inner side of the opening.

[0014] Furthermore, lifting wheel openings adapted to the moving wheels are respectively opened at the four corners of the inner side of the base plate.

[0015] Compared with the prior art, this utility model provides a high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition, which has the following beneficial effects:

[0016] This high-precision acoustic holographic multidimensional monitoring device, based on multi-channel acquisition, features switchable small-aperture and large-aperture microphone arrays, with electric push rods driving the extension selection. The small-aperture array is suitable for precise positioning of high-frequency sound waves, while the large-aperture array is suitable for effective capture of low-frequency sound waves. This multi-functionality significantly broadens the application range of the device and improves the dimensionality and accuracy of monitoring. In addition, the temperature sensor can monitor the ambient temperature in real time, automatically correct the calculated sound velocity value, and eliminate temperature drift errors. The reference microphone can collect ambient background noise and effectively suppress interference through signal processing technology, thereby improving the signal-to-noise ratio. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0018] Figure 2 This is a front view of the structure of this utility model;

[0019] Figure 3 This is a perspective view of the fixing plate, fixing block, connecting plate, and guide rod in the structure of this utility model.

[0020] In the diagram: 1. Housing; 2. Frame; 3. Base plate; 4. Motor; 5. Rotating rod; 6. Connecting plate; 7. Electric push rod; 8. Small aperture microphone array; 9. Large aperture microphone array; 10. Ball bearing; 11. Laser rangefinder; 12. High-definition camera; 13. Temperature sensor; 14. Reference microphone; 15. Threaded rod; 16. Threaded block; 17. Fixing plate; 18. Fixing block; 19. Connecting plate; 20. Moving wheel; 21. Guide rod. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 3 This embodiment of a high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition includes a housing 1, a frame 2 fixedly connected to the left and right sides of the housing 1 respectively, and a base plate 3 fixedly connected between the bottoms of the left and right frame 2. The inner side of the housing 1 is provided with a monitoring component for monitoring.

[0023] Please see Figure 1 In this embodiment, the monitoring component includes a motor 4 fixedly connected to the top wall inside the housing 1. The output shaft of the motor 4 is fixedly connected to a rotating rod 5. The bottom end of the rotating rod 5 is fixedly connected to a connecting plate 6. Electric push rods 7 are fixedly connected to the left and right sides of the top of the connecting plate 6. A small-aperture microphone array 8 is fixedly connected to one end of the movable rod of the left electric push rod 7, and a large-aperture microphone array 9 is fixedly connected to one end of the movable rod of the right electric push rod 7.

[0024] Specifically, an array opening is provided on the top of the inner side of the housing 1, and the array opening is located on the right side of the top of the housing 1.

[0025] It should be noted that the array port is used to allow the small-aperture microphone array 8 and the large-aperture microphone array 9 to be smoothly extended outside the housing 1 for measurement, or completely retracted into the housing 1 for protection and transportation, driven by the electric push rod 7.

[0026] Specifically, a ball bearing 10 is provided at the center of the bottom of the connecting plate 6, and the ball bearing 10 is in contact with the inner bottom wall of the housing 1.

[0027] It should be noted that the function of the ball bearing 10 is to form a low-friction support point. When the motor 4 drives the rotating rod 5 and the connecting plate 6 to rotate, the ball bearing 10 rolls on the bottom wall inside the housing 1, greatly reducing rotational resistance.

[0028] Specifically, a laser rangefinder 11 and a high-definition camera 12 are fixedly connected to the right side of the enclosure 1, and a temperature sensor 13 and two reference microphones 14 are fixedly connected to the left side of the enclosure 1.

[0029] It should be noted that the laser rangefinder 11 is used to accurately measure the distance from the enclosure 1 to the surface of the target. The high-definition camera 12 is used to simultaneously acquire optical images of the target, which are then fused and superimposed with the acoustic hologram to achieve precise visualization and localization of the sound source, intuitively displaying the location of the sound. The temperature sensor 13 is used to monitor the ambient temperature and the speed of sound that changes with temperature. The reference microphone 14 is positioned on the side facing away from the measurement area and is mainly used to collect ambient background noise.

[0030] Specifically, a threaded rod 15 is rotatably connected to the inner bottom wall of the frame 2, a threaded block 16 is threadedly connected to the outer side of the threaded rod 15, a fixing plate 17 is fixedly connected to both the front and rear sides of the threaded block 16, a fixing block 18 is fixedly connected between the opposite sides of the fixing plates 17 on the front and rear sides, a connecting plate 19 is fixedly connected to the bottom of the fixing block 18, and two movable wheels 20 are fixedly connected to the bottom of the connecting plate 19.

[0031] It should be noted that this structure forms a manually operated lifting mobile chassis. By rotating the torsion cap at the top of the threaded rod 15, the threaded block 16 and the entire lifting mechanism connected to it are driven to move vertically up and down along the guide rod 21. Its function is to enable rapid switching between the moving state and the measuring state of the equipment.

[0032] Specifically, a torsion cap is fixedly connected to the top of the threaded rod 15, a guide channel is provided on the inner side of the fixing block 18, and a guide rod 21 is slidably connected to the inner side of the guide channel. The bottom end of the guide rod 21 is fixedly connected to the base plate 3.

[0033] Specifically, the inner side of the connecting plate 19 is provided with an opening that is adapted to the guide rod 21 and connected to the guide channel, and the guide rod 21 is slidably connected to the inner side of the opening.

[0034] Specifically, lifting wheel openings adapted to the moving wheels 20 are respectively opened at the four corners of the inner side of the base plate 3.

[0035] The working principle of the above embodiments is as follows:

[0036] The operator pushes the equipment to the area to be measured, and drives the moving wheel 20 to rise by rotating the screw rod 15 on the frame 2 to support the entire device with the base plate 3, ensuring that the equipment is stable during the measurement process. The laser rangefinder 11 works to measure and output the accurate distance value from the box 1 to the surface of the target to the control system. The temperature sensor 13 collects the ambient temperature T and uploads it. The high-definition camera 12 adjusts the angle to capture a global optical image of the target.

[0037] The control computer determines whether to use a small-aperture microphone array 8 or a large-aperture microphone array 9 based on the characteristic frequency of the target sound source. The small-aperture microphone array 8 is used for high-frequency, high-resolution monitoring, while the large-aperture microphone array 9 is used for low-frequency, wide-range monitoring. The motor 4 starts, driving the rotating rod 5 and the connecting plate 6 to rotate, thereby moving the selected microphone array to the bottom of the array port. The corresponding electric push rod 7 is activated, smoothly pushing the connected microphone array through the array port on the top of the housing 1 to the working position.

[0038] The small-aperture microphone array 8 or the large-aperture microphone array 9 collects sound pressure signals. At the same time, the reference microphone 14 continuously collects ambient background noise. The system transmits all microphone signals, distance data from the laser rangefinder 11, and temperature data from the temperature sensor 13 to the control system for analysis.

[0039] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.

[0040] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] 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.

[0042] 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. A high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition, comprising a housing (1), frames (2) respectively fixedly connected to the left and right sides of the housing (1), and a base plate (3) fixedly connected between the bottoms of the left and right frames (2), characterized in that: The inner side of the housing (1) is provided with a monitoring component for monitoring; The monitoring component includes a motor (4) fixedly connected to the top wall of the housing (1). The output shaft of the motor (4) is fixedly connected to a rotating rod (5). The bottom end of the rotating rod (5) is fixedly connected to a connecting plate (6). Electric push rods (7) are fixedly connected to the left and right sides of the top of the connecting plate (6). A small-aperture microphone array (8) is fixedly connected to one end of the movable rod of the electric push rod (7) on the left side, and a large-aperture microphone array (9) is fixedly connected to one end of the movable rod of the electric push rod (7) on the right side.

2. The high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition according to claim 1, characterized in that: The top of the inner side of the box (1) is provided with an array opening, and the array opening is located on the right side of the top of the box (1).

3. The high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition according to claim 1, characterized in that: A ball bearing (10) is provided at the center of the bottom of the connecting plate (6), and the ball bearing (10) is in contact with the inner bottom wall of the box (1).

4. The high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition according to claim 1, characterized in that: A laser rangefinder (11) and a high-definition camera (12) are fixedly connected to the right side of the housing (1), and a temperature sensor (13) and two reference microphones (14) are fixedly connected to the left side of the housing (1).

5. The high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition according to claim 1, characterized in that: The inner bottom wall of the frame (2) is rotatably connected to a threaded rod (15), and a threaded block (16) is threadedly connected to the outer side of the threaded rod (15). A fixing plate (17) is fixedly connected to both the front and rear sides of the threaded block (16), and a fixing block (18) is fixedly connected between the opposite sides of the fixing plates (17) on the front and rear sides. A connecting plate (19) is fixedly connected to the bottom of the fixing block (18), and two movable wheels (20) are fixedly connected to the bottom of the connecting plate (19).

6. A high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition according to claim 5, characterized in that: The top end of the threaded rod (15) is fixedly connected to a torsion cap, the inner side of the fixing block (18) is provided with a guide channel, and the inner side of the guide channel is slidably connected to a guide rod (21), the bottom end of the guide rod (21) is fixedly connected to the base plate (3).

7. A high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition according to claim 5, characterized in that: The inner side of the connecting plate (19) is provided with an opening that is adapted to the guide rod (21) and connected to the guide channel, and the guide rod (21) is slidably connected to the inner side of the opening.

8. A high-precision acoustic holographic multidimensional monitoring device based on multi-channel acquisition according to claim 1, characterized in that: The four corners of the inner side of the base plate (3) are respectively provided with lifting wheel openings that are compatible with the moving wheels (20).

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