Bone conduction voiceprint sensing device

Abstract

The utility model provides a kind of bone conduction formula voiceprint sensing device, including mounting plate, displacement block is slidably matched on the mounting plate, the top of the displacement block is provided with signal preprocessing module, the bottom of the signal preprocessing module is fixedly connected with and displacement block is matched with connecting cylinder, the bottom of the connecting cylinder is provided with voiceprint acquisition assembly, the voiceprint acquisition assembly includes the transverse plate of fixed connection in the bottom end of connecting cylinder, the bottom both sides of the mounting plate are provided with clamping strip. Through bendable metal conducting sheet, elastic compensation structure and height adjustment mechanism, the problem that traditional fixed plane sensor cannot adapt to arc, complex equipment surface with heat dissipation fin and the like is solved, the universal monitoring of various equipment such as hydropower station GCB switch cabinet, high-pressure oil pump, technical water supply pump is realized, flexible conducting sheet is combined with elastic structure, the full contact of sensor and equipment surface is guaranteed, vibration voiceprint conduction loss is reduced, signal disconnection or distortion is avoided, and collection accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of voiceprint sensing technology, specifically a bone conduction voiceprint sensing device. Background Technology

[0002] During the start-up and shutdown of hydropower station units, real-time monitoring of the status of critical equipment such as the GCB (Government Switchgear) opening and closing, and pump start-up and shutdown is necessary, as it is crucial for the safe and stable operation of the power grid and the reliability of energy supply. Currently, the industry relies heavily on acoustic signature sensing technology to collect characteristic audio signals during equipment operation, and then uses algorithms to analyze these signals to identify start-up and shutdown status and provide early warnings of faults. The performance of the acoustic signature acquisition device is the core factor affecting the accuracy of the identification. Existing acoustic signature acquisition uses bone conduction sensors based on solid vibration transmission. These devices directly adhere to the equipment surface and collect acoustic signature signals using the principle of solid vibration transmission. However, due to the significant differences in the external structure of critical equipment in hydropower stations—for example, the GCB switch cabinet is a flat metal structure, the high-pressure oil pump casing is an arc-shaped curved surface, and the technical water supply pump has heat dissipation fins—existing bone conduction sensors mostly use a fixed planar contact design, which can only adapt to a single type of equipment surface. When facing equipment with arc-shaped or protruding structures, the contact area between the sensor and the equipment surface is insufficient, resulting in a decrease in vibration acoustic signature transmission efficiency. This leads to signal interruption or distortion, failing to meet the needs of universal monitoring of multiple devices. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a bone conduction acoustic signature sensor to solve the problems mentioned in the background section. This invention features a novel structure, employing a flexible metal conductive sheet, an elastic compensation structure, and a height adjustment mechanism. This solves the problem that traditional fixed-plane sensors cannot adapt to complex equipment surfaces such as curved surfaces or those with heat dissipation fins. It enables universal monitoring of various equipment, including hydropower station GCB switchgear, high-pressure oil pumps, and technical water supply pumps. The combination of the flexible conductive sheet and the elastic structure ensures full contact between the sensor and the equipment surface, reducing vibration acoustic signature transmission loss, preventing signal disconnection or distortion, and improving acquisition accuracy.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a bone conduction voiceprint sensing device, comprising a mounting plate, a displacement block slidably fitted on the mounting plate, a signal preprocessing module disposed above the displacement block, a connecting cylinder cooperating with the displacement block fixedly connected to the bottom of the signal preprocessing module, a voiceprint acquisition component disposed at the bottom of the connecting cylinder, the voiceprint acquisition component comprising a horizontal plate fixedly connected to the bottom end of the connecting cylinder, three piezoelectric ceramic sensors disposed below the horizontal plate, a metal conductive sheet fixedly connected to the bottom of the three piezoelectric ceramic sensors, the metal conductive sheet being designed as a flexible structure, and clamping strips disposed on both sides of the bottom of the mounting plate.

[0005] Furthermore, both sides of the mounting plate are provided with sliding grooves, and both sides of the mounting plate are rotatably fitted with translation screws that pass through the sliding grooves. The upper end of the clamping strip is slidably fitted in the sliding groove and threadedly fitted with the translation screws. The lower inner sides of the two clamping strips are fixedly connected with pads.

[0006] Furthermore, a displacement groove is provided through the upper side of the middle part of the mounting plate, and the displacement block is horizontally slidably engaged in the displacement groove. A first limiting groove is provided on the inner wall of the displacement groove, and a first limiting block that slidably engages with the first limiting groove is fixedly connected to one side of the displacement block.

[0007] Furthermore, the inner wall of the displacement groove is provided with a through groove extending outward, and a stud that slides with the through groove is fixedly connected to one side of the displacement block. A fixing nut that abuts against the outer side of the mounting plate is threaded around the stud.

[0008] Furthermore, a movable ball is fixedly connected to the periphery of the connecting cylinder, and a spherical recess is provided in the middle of the displacement block to cooperate with the movable ball. A positioning bolt is threaded on the outer side of the displacement block and extends into the spherical recess. One end of the positioning bolt abuts against the outer side of the movable ball.

[0009] Furthermore, the upper sides of the piezoelectric ceramic sensors on both sides above the metal conductive sheet are rotatably fitted with connecting brackets, and connecting slots are opened through both sides of the horizontal plate, with the tops of the two connecting brackets located in the connecting slots on both sides respectively.

[0010] Furthermore, a fixing post that slides with the top of the connecting frame is fixedly connected between the inner walls of the two sides of the connecting groove, and springs are fixedly connected between the top of the connecting frame and the two side walls of the connecting groove.

[0011] Furthermore, a lifting screw is fixedly connected to the upper side of the piezoelectric ceramic sensor in the middle of the upper part of the metal conductive plate. The lifting screw passes through the horizontal plate to the inner wall of the connecting cylinder. An adjusting screw cylinder is rotatably fitted around the lifting screw and threadedly engaged with it at the bottom of the horizontal plate. A second limiting block is fixedly connected to the top of the lifting screw. A second limiting groove is opened on the inner wall of the connecting cylinder to slide with the second limiting block.

[0012] The beneficial effects of this utility model are:

[0013] 1. This bone conduction acoustic signature sensor solves the problem that traditional fixed-plane sensors cannot adapt to complex equipment surfaces such as curved surfaces and those with heat dissipation fins by using a flexible metal conductive sheet, an elastic compensation structure, and a height adjustment mechanism. It enables universal monitoring of various equipment such as hydropower station GCB switchgear, high-pressure oil pumps, and technical water supply pumps. The combination of the flexible conductive sheet and the elastic structure ensures full contact between the sensor and the equipment surface, reduces vibration acoustic signature transmission loss, avoids signal disconnection or distortion, and improves acquisition accuracy.

[0014] 2. This bone conduction voiceprint sensor, through its multi-dimensional adjustable design of horizontal displacement, angular rotation, and clamp spacing, can quickly adapt to equipment of different sizes and shapes, reducing on-site installation difficulty and improving monitoring efficiency. The mechanical structure, which combines rigid fixation with flexible compensation, can ensure the stability of the device in the vibration environment of the equipment, and can also adapt to the differences in the surface of the equipment through deformation, meeting the long-term monitoring needs of complex industrial scenarios. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a bone conduction voiceprint sensing device according to this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the metal conductive sheet of this utility model when it is bent;

[0017] Figure 3 This is a schematic diagram of the connection between the displacement block and the connecting cylinder of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the voiceprint acquisition component of this utility model;

[0019] Figure 5 This utility model Figure 4 -Enlarged structural diagram at point A;

[0020] Figure 6 This utility model Figure 4 - Enlarged structural diagram at point B.

[0021] In the diagram: 1. Mounting plate; 2. Displacement block; 3. Signal preprocessing module; 4. Connecting cylinder; 5. Acoustic fingerprint acquisition component; 501. Horizontal plate; 502. Piezoelectric ceramic sensor; 503. Metal conductive sheet; 504. Connecting frame; 505. Connecting groove; 506. Fixing column; 507. Spring; 508. Lifting screw; 509. Adjusting screw cylinder; 510. Second limit block; 511. Second limit groove; 6. Clamping bar; 7. Pad; 8. Slide groove; 9. Translation screw; 10. Displacement groove; 11. First limit groove; 12. Through groove; 13. First limit block; 14. Stud; 15. Fixing nut; 16. Movable ball; 17. Spherical socket; 18. Positioning bolt. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please refer to Figures 1 to 6 This utility model provides a technical solution: a bone conduction voiceprint sensing device, including a mounting plate 1, a displacement block 2 slidably fitted on the mounting plate 1, a signal preprocessing module 3 disposed above the displacement block 2, a connecting cylinder 4 that cooperates with the displacement block 2 fixedly connected to the bottom of the signal preprocessing module 3, a voiceprint acquisition component 5 disposed at the bottom of the connecting cylinder 4, the voiceprint acquisition component 5 including a horizontal plate 501 fixedly connected to the bottom end of the connecting cylinder 4, three piezoelectric ceramic sensors 502 disposed below the horizontal plate 501, a metal conductive sheet 503 fixedly connected to the bottom of the three piezoelectric ceramic sensors 502, the metal conductive sheet 503 being designed as a flexible structure, and clamping strips 6 disposed on both sides of the bottom of the mounting plate 1.

[0024] In this embodiment, sliding grooves 8 are provided through both sides of the mounting plate 1. Translation screws 9, which penetrate into the sliding grooves 8, are rotatably fitted on both sides of the mounting plate 1. The upper end of the clamping strip 6 is slidably fitted within the sliding groove 8 and threadedly engaged with the translation screws 9. Pads 7 are fixedly connected to the lower inner sides of both clamping strips 6. A displacement groove 10 is provided downwards through the upper side of the middle of the mounting plate 1. The displacement block 2 is horizontally slidably fitted within the displacement groove 10. A first limiting groove 11 is provided on the inner wall of the displacement groove 10. One side of the displacement block 2 is fixedly connected to a device that slidably engages with the first limiting groove 11. The first limiting block 13, the inner wall of the displacement groove 10 is provided with a through groove 12 extending outward, a stud 14 is fixedly connected to one side of the displacement block 2 and slides with the through groove 12, a fixing nut 15 is threaded around the stud 14 and abuts against the outer side of the mounting plate 1, a movable ball 16 is fixedly connected around the periphery of the connecting cylinder 4, a spherical socket 17 is provided in the middle of the displacement block 2 and moves with the movable ball 16, a positioning bolt 18 is threaded around the outer side of the displacement block 2 and extends into the spherical socket 17, one end of the positioning bolt 18 abuts against the outer side of the movable ball 16.

[0025] Specifically, the displacement block 2 can slide horizontally along the displacement groove 10 of the mounting plate 1 and be locked by the fixing nut 15 to realize the horizontal position adjustment of the acquisition component; the connecting cylinder 4 can rotate at multiple angles through the cooperation of the movable ball 16 and the spherical socket 17, and is fixed with the positioning bolt 18 to adapt to the tilt angle of the equipment surface; the clamping strips 6 on both sides can slide along the slide groove 8 through the translation screw 9 to quickly clamp equipment of different sizes and realize the stable installation of the device.

[0026] In this embodiment, connecting brackets 504 are rotatably fitted on the upper sides of the piezoelectric ceramic sensors 502 on both sides above the metal conductive sheet 503. Connecting slots 505 are formed through both sides of the horizontal plate 501. The tops of the two connecting brackets 504 are respectively located within the connecting slots 505 on both sides. Fixing posts 506, which slide with the tops of the connecting brackets 504, are fixedly connected between the inner walls of the two sides of the connecting slots 505. Springs are fixedly connected between the tops of the connecting brackets 504 and the two side walls of the connecting slots 505 on both sides. 507. A lifting screw 508 is fixedly connected to the upper side of the piezoelectric ceramic sensor 502 above the center of the metal conductive plate 503. The lifting screw 508 passes through the horizontal plate 501 to the inner wall of the connecting cylinder 4. The bottom of the horizontal plate 501 is rotatably fitted with an adjusting screw cylinder 509 that is sleeved around the lifting screw 508 and threadedly engaged with it. The top end of the lifting screw 508 is fixedly connected to a second limiting block 510. The inner wall of the connecting cylinder 4 is provided with a second limiting groove 511 that slides with the second limiting block 510.

[0027] Specifically, in the voiceprint acquisition component 5, three piezoelectric ceramic sensors 502 are connected to flexible metal conductive plates 503 at their bottoms. The flexible deformation of the metal conductive plates adapts to non-planar equipment surfaces such as arcs and protrusions, ensuring close contact with the equipment surface. The height of the middle piezoelectric ceramic sensor 502 can be adjusted by the cooperation of the lifting screw 508 and the adjusting cylinder 509. The sensors on both sides adaptively compensate for the contact pressure through the elastic structure of the connecting frame 504 and the spring 507, further improving the fit. Equipment vibration is transmitted to the piezoelectric ceramic sensor 502 through the metal conductive plates 503. The sensor converts the vibration signal into an electrical signal, which is then pre-processed by the signal preprocessing module 3 before being output, ensuring the integrity and stability of the signal.

[0028] When using the device, firstly, according to the size of the target device, rotate the translation screws 9 on both sides of the mounting plate 1 to drive the clamping strips 6 to slide along the slide groove 8, adjust the distance between the two clamping strips to match the width of the device, and clamp the device through the pads 7 on the inner side of the clamping strips to complete the fixed installation of the device. Then, loosen the fixing nut 15 on one side of the displacement block 2, push the stud 14 to slide along the through groove 12, and drive the displacement block 2 to move horizontally in the displacement groove 10 (the first limit block 13 slides along the first limit groove 11 to ensure stability), and adjust the acoustic fingerprint acquisition component 5 to be directly below the area to be monitored by the device. Next, loosen the positioning bolt 18 on the outside of the displacement block 2, drive the movable ball 16 to rotate in the spherical socket 17 through the connecting cylinder 4, adjust the tilt angle of the acoustic fingerprint acquisition component 5 so that the metal conductive plate 503 is aligned with the surface of the device, and then tighten the positioning bolt 18 to fix the angle, depending on the surface shape of the device (flat, curved or with heat dissipation). The ribs are adjusted to adapt to the contact of the acoustic fingerprint acquisition component 5: if it is a flat surface, the metal conductive plate 503 naturally fits, and the connecting frames 504 on both sides maintain stable pressure under the action of the spring 507; if it is an arc-shaped or convex surface, the adjusting screw 509 at the bottom of the horizontal plate 501 is rotated to drive the lifting screw 508 to lift the piezoelectric ceramic sensor 502 in the middle. The metal conductive plate 503 bends and deforms to fit the surface, while the connecting frames 504 on both sides slide along the fixed column 506. The spring 507 extends and retracts to compensate for the contact pressure difference. The vibration generated during the operation of the equipment is transmitted to the metal conductive plate 503 through the surface, and then to the three piezoelectric ceramic sensors 502. The sensors convert the vibration signal into an electrical signal and transmit it to the signal preprocessing module 3 above for filtering, amplification and other preliminary processing. Finally, a stable and complete acoustic fingerprint signal is output to meet the vibration acoustic fingerprint monitoring needs of various types of equipment.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bone conduction voiceprint sensing device, comprising a mounting plate (1), characterized in that: The mounting plate (1) is slidably fitted with a displacement block (2). A signal preprocessing module (3) is provided above the displacement block (2). A connecting cylinder (4) that cooperates with the displacement block (2) is fixedly connected to the bottom of the signal preprocessing module (3). A voiceprint acquisition component (5) is provided at the bottom of the connecting cylinder (4). The voiceprint acquisition component (5) includes a horizontal plate (501) fixedly connected to the bottom end of the connecting cylinder (4). Three piezoelectric ceramic sensors (502) are provided below the horizontal plate (501). A metal conductive sheet (503) is fixedly connected to the bottom of the three piezoelectric ceramic sensors (502). The metal conductive sheet (503) is designed as a bendable structure. Clips (6) are provided on both sides of the bottom of the mounting plate (1).

2. The bone conduction voiceprint sensing device according to claim 1, characterized in that: The mounting plate (1) has a sliding groove (8) through both sides. The mounting plate (1) has a translation screw (9) through the sliding groove (8) on both sides. The upper end of the clamping strip (6) is slidably fitted in the sliding groove (8) and threadedly fitted with the translation screw (9). The lower inner side of the two clamping strips (6) is fixedly connected with a pad (7).

3. The bone conduction voiceprint sensing device according to claim 2, characterized in that: The mounting plate (1) has a downward-through displacement groove (10) on the upper side of the middle part. The displacement block (2) is horizontally slidably fitted in the displacement groove (10). The inner wall of the displacement groove (10) has a first limiting groove (11). One side of the displacement block (2) is fixedly connected to a first limiting block (13) that slidably fits the first limiting groove (11).

4. The bone conduction voiceprint sensing device according to claim 3, characterized in that: The inner wall of the displacement groove (10) is provided with a through groove (12) extending outward. One side of the displacement block (2) is fixedly connected with a stud (14) that slides with the through groove (12). The stud (14) is threaded with a fixing nut (15) that abuts against the outer side of the mounting plate (1).

5. A bone conduction voiceprint sensing device according to claim 4, characterized in that: The connecting cylinder (4) is fixedly connected to a movable ball (16) on its periphery. The middle part of the displacement block (2) is provided with a spherical socket (17) that movably engages with the movable ball (16). The outer side of the displacement block (2) is threaded with a positioning bolt (18) that penetrates into the spherical socket (17). One end of the positioning bolt (18) abuts against the outer side of the movable ball (16).

6. The bone conduction voiceprint sensing device according to claim 1, characterized in that: The upper sides of the piezoelectric ceramic sensors (502) on both sides above the metal conductive sheet (503) are rotatably fitted with connecting brackets (504), and the two sides of the horizontal plate (501) are provided with connecting grooves (505). The tops of the two connecting brackets (504) are respectively located in the connecting grooves (505) on both sides.

7. A bone conduction voiceprint sensing device according to claim 6, characterized in that: A fixed column (506) that slides with the top of the connecting frame (504) is fixedly connected between the inner walls of the two sides of the connecting groove (505). Springs (507) are fixedly connected between the top of the connecting frame (504) and the two side walls of the connecting groove (505).

8. A bone conduction voiceprint sensing device according to claim 7, characterized in that: A lifting screw (508) is fixedly connected to the upper side of the piezoelectric ceramic sensor (502) in the middle of the upper part of the metal conductive sheet (503). The lifting screw (508) passes through the horizontal plate (501) to the inner wall of the connecting cylinder (4). The bottom of the horizontal plate (501) is rotatably fitted with an adjusting screw cylinder (509) that is sleeved around the lifting screw (508) and threadedly fitted therewith. The top end of the lifting screw (508) is fixedly connected with a second limiting block (510). The inner wall of the connecting cylinder (4) is provided with a second limiting groove (511) that slides with the second limiting block (510).

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