Vehicle resonance source positioning and simulation detection device

Abstract

The utility model discloses vehicle resonance vibration source positioning and simulation detection device relates to vibration source detection device technical field, including the inside base claw disc for supporting multiple groups sound acquisition module, and multiple groups sound acquisition module are arranged in ring array with the axis of inside base claw disc as center, is equipped with the change array mechanism of adjusting multiple groups sound acquisition module arrangement mode on inside base claw disc, and the change array mechanism includes the outer ring disc coaxially arranged with inside base claw disc, is equipped with the shaft shift subassembly of driving multiple groups sound acquisition module synchronous and moving towards or moving away from on inside base claw disc, the utility model discloses through setting change array mechanism, can change multiple groups sound acquisition module arrangement mode, and then can be according to the measured frequency adaptive adjustment geometric parameter to improve the angular resolution to small size sound source, and still has enough beam width when detecting to large scale vibration source, and then ensure that detection range and detection accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of vibration source detection devices, specifically a device for locating and simulating vehicle resonance vibration sources. Background Technology

[0002] During vehicle operation, factors such as engine operation, uneven road surfaces, and transmission system operation will generate vibrations of different frequencies and amplitudes. When the frequency of these vibrations is close to or the same as the natural frequency of the vehicle's structure or components, resonance may occur, leading to abnormal vibrations in parts or the vehicle as a whole. This can even cause problems such as noise, structural fatigue, and component failure, seriously affecting the driving experience and driving safety.

[0003] Chinese Patent (Announcement No.: CN116086831B) specifies the following steps: Step 1: Constructing an identification module and a detection module at a pilot vehicle location; the detection module continuously detects vibration data of the vehicle in both driving and braking states; the identification module compares the data detected by the detection module with preset values, and compares the data detected by the detection module with the data detected by the vehicle in both states; Step 2: Conducting start-stop experiments on the vehicle, including driving and braking, and determining the resonance mode of the vehicle based on the data from the detection module; and determining the source of resonance based on the resonance mode and the comparison results from the identification module; Step 3: Formulating elimination measures and verifying the effectiveness of the elimination measures.

[0004] As automotive performance requirements continue to increase, quickly and accurately locating the sources of low-frequency resonance and high-frequency abnormal noise inside the vehicle has become a key aspect of vehicle development. Existing technologies generally adopt a solution of "fixed microphone array + subsequent transmission path analysis": dozens of microphones are placed on the vehicle body, noise signals are obtained through one or more sports car tests, and then the location of the sound source is deduced by algorithms such as beamforming and near-field acoustic holography.

[0005] However, due to limitations in in-vehicle installation space and wiring harness weight, it is often impossible to simultaneously achieve the desired aperture and element density for microphone arrays.

[0006] 1. Large-aperture sparse arrays have large positioning errors for large-scale vibration sources (tires, exhaust) in the 20-200Hz range;

[0007] 2. While small-aperture dense arrays can improve high-frequency resolution, they are difficult to cover the entire vehicle cabin and require repeated disassembly and assembly of arrays of different specifications, resulting in long testing cycles and high costs.

[0008] Furthermore, fixed arrays cannot adaptively adjust their geometric parameters according to the measured frequency, resulting in low frequencies being "unclear" and high frequencies being "not very visible," which to some extent restricts the efficiency of rapid diagnosis of resonance anomalies. Therefore, a vehicle resonance source localization and simulation detection device is proposed. Utility Model Content

[0009] The purpose of this invention is to provide a vehicle resonance source location and simulation detection device, which has the advantage of adaptively adjusting geometric parameters according to the measured frequency to ensure detection range and accuracy, and solves the problem that restricts the efficiency of rapid diagnosis of resonance anomaly locations.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a vehicle resonance source positioning and simulation detection device, including an inner base claw disk for supporting multiple sets of sound acquisition modules, wherein the multiple sets of sound acquisition modules are arranged in a circular array with the axis of the inner base claw disk as the center, and the inner base claw disk is provided with a variable array mechanism for adjusting the arrangement of the multiple sets of sound acquisition modules.

[0011] The array mechanism includes an outer ring disk coaxially arranged with the inner base claw disk. Multiple sets of center rods are fixedly connected to the outer peripheral surface of the inner base claw disk. The ends of the multiple sets of center rods away from the inner base claw disk are all fixedly connected to the inner peripheral surface of the outer ring disk. The inner base claw disk is provided with an axis shifting component that drives multiple sets of sound acquisition modules to move synchronously towards or away from each other.

[0012] The outer ring disk includes multiple sets of integrally formed protrusions. Each set of protrusions is provided with a connecting post and a circular hole for the connecting post to slide through. The protrusions are provided with a swaying component that drives two adjacent sets of sound acquisition modules to deflect synchronously toward one side of the connecting post.

[0013] Preferably, the shaft shifting assembly includes multiple sets of axial racks that can move freely in the horizontal direction. Both the inner base claw disk and the outer ring disk are provided with shaft position grooves for sliding connection of the axial racks. The end of the axial rack away from the inner base claw disk has an end rod that rotates on a fixed axis.

[0014] The end of the axial rod away from the rack is fixedly connected to a support base, and the sound acquisition module is fixedly connected to the support base;

[0015] The axial rod is parallel to the axial rack in the initial state.

[0016] Preferably, a sleeve seat is slidably sleeved on the connecting column, and a clearance connecting rod is rotatably mounted on the sleeve seat, with one end of the clearance connecting rod away from the sleeve seat rotating on an end rod.

[0017] Preferably, the axial rack is provided with a torsion spring that drives the axial rod to maintain its initial state.

[0018] Preferably, each of the multiple sets of axial racks is meshed with a set of side gears, the side gears rotate on the inner base pawl disk with a fixed axis, and the multiple sets of side gears are synchronously meshed with a set of internal gear rings, the internal gear rings rotate on the outer ring disk with a fixed axis.

[0019] A No. 1 motor for driving the internal gear ring to rotate horizontally is fixedly connected to the outer ring disk.

[0020] Preferably, the swaying assembly includes a central disk that is driven by a second motor and can rotate freely in the horizontal direction. The central disk and the inner base claw disk are coaxially arranged, and the central disk rotates on the inner base claw disk with a fixed axis.

[0021] Each of the multiple sets of connecting columns is fixedly connected to a corresponding pin at one end facing the central plate, and the central plate is provided with an arc-shaped groove for the corresponding pin to slide.

[0022] Preferably, a positioning block is fixedly connected to the end of the connecting post away from the co-position pin.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] 1. By setting up a variable array mechanism, this utility model can change the arrangement of multiple sound acquisition modules, and then adaptively adjust the geometric parameters according to the measured frequency, thereby improving the angular resolution of small sound sources, and still having sufficient beamwidth when detecting large-scale vibration sources, thus ensuring the detection range and detection accuracy.

[0025] 2. By setting up an axis shifting component, this utility model can achieve stepless adjustment of the diameter of the ring array. The same measuring point can generate a "high-density local array" and a "large-aperture panoramic array" one after the other. There is no need to manually change the array mode. The full-band test that requires multiple points to cover is compressed into one completion, thereby shortening the testing cycle. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the component containing the inner base claw disk of this utility model;

[0028] Figure 3 This is a schematic diagram of the component containing the axial rack of this utility model;

[0029] Figure 4 This is a schematic diagram of the component containing the central disk of this utility model;

[0030] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 This is a schematic diagram of the component containing the connecting column of this utility model;

[0032] Figure 7 This is a schematic diagram of the circular array arrangement of multiple sound acquisition modules of this utility model.

[0033] In the diagram: 1. Inner base claw disk; 2. Outer ring disk; 201. Outer protrusion; 3. Inner gear ring; 4. Side gear; 5. Center rod; 6. Axial rack; 7. Shaft groove; 8. End rod; 9. Support seat; 10. Sound acquisition module; 11. Connecting column; 12. Positioning block; 13. Sleeve seat; 14. Relief connecting rod; 15. Center disk; 16. Corresponding pin; 17. Arc-shaped groove. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0035] Please see Figures 1 to 7 This utility model provides a technical solution: a vehicle resonance vibration source positioning and simulation detection device, including an inner base claw disk 1 for supporting multiple sets of sound acquisition modules 10, the multiple sets of sound acquisition modules 10 are arranged in a ring array with the axis of the inner base claw disk 1 as the center, and the inner base claw disk 1 is provided with a variable array mechanism for adjusting the arrangement of the multiple sets of sound acquisition modules 10.

[0036] The array mechanism includes an outer ring disk 2 coaxially arranged with the inner base claw disk 1. Multiple sets of center rods 5 are fixedly connected to the outer peripheral surface of the inner base claw disk 1. The ends of the multiple sets of center rods 5 away from the inner base claw disk 1 are all fixedly connected to the inner peripheral surface of the outer ring disk 2. The inner base claw disk 1 is provided with an axis shifting component that drives multiple sets of sound acquisition modules 10 to move synchronously towards or away from each other.

[0037] The outer ring disk 2 includes multiple integrally formed protrusions 201. Each of the protrusions 201 is provided with a connecting post 11 and a circular hole for the connecting post 11 to slide through. The protrusions 201 are provided with a swaying component that drives two adjacent sound acquisition modules 10 to deflect synchronously toward one side of the connecting post 11.

[0038] like Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, when detecting the resonance source location of a vehicle, the inner base claw disk 1 is securely installed inside the vehicle with external support components. By starting the vehicle, the vehicle engine is put into operation. Multiple sets of sound acquisition modules 10 arranged in a circular array on the inner base claw disk 1 collect the sound of the vehicle's components during operation. The arrangement of the multiple sets of sound acquisition modules 10 is changed by a variable array mechanism to achieve multi-directional and multi-mode sound collection, thereby further ensuring detection accuracy and helping staff to identify and determine the resonance location.

[0039] Meanwhile, the shaft shifting component can drive multiple sets of sound acquisition modules 10 to synchronously approach or move away from the axis of the inner base claw disk 1, thereby changing the diameter of the annular size formed by the multiple sets of sound acquisition modules 10. During this process, when the diameter of the annular space becomes smaller, the array elements composed of multiple sets of sound acquisition modules 10 are locally densified, and the effective area of ​​their sound collection range partially overlaps, thereby improving the angular resolution of high frequencies for small-sized sound sources such as gear squeals and electrode orders. When the size of the annular space becomes larger, there is still sufficient beamwidth for large-scale vibration sources (tires, body panels, exhaust hangers), thereby ensuring the detection range and detection accuracy.

[0040] By changing the diameter of the ring size through the axis shift component, it is not necessary to manually replace the array of multiple sound acquisition modules 10. This allows for the acquisition of multiple measurement data at the same measurement point, thereby shortening the detection cycle and further improving detection efficiency.

[0041] Meanwhile, a connecting post 11 slides through the protruding part 201. The connecting post 11 can ensure the stability of multiple sound acquisition modules 10 when moving in the horizontal axis. Under the drive of the swing component, it can make multiple sound acquisition modules 10 approach each other, so that there are two sound acquisition modules 10 in the same small area. Then, by taking advantage of the prior knowledge that the cross spectrum phase of the signals of the two sound acquisition modules 10 should be basically zero, the channel phase error caused by temperature drift or vehicle body micro-vibration can be corrected in real time. There is no need to carry an additional calibration sound source, thus simplifying the detection process.

[0042] In one preferred embodiment, the shaft shifting assembly includes multiple sets of axial racks 6 that move freely in the horizontal direction. Both the inner base claw disk 1 and the outer ring disk 2 are provided with shaft position grooves 7 for sliding connection of the axial racks 6. The end of the axial rack 6 away from the inner base claw disk 1 is fixedly rotatably equipped with an end rod 8.

[0043] The end of the directional rod 8 away from the axial rack 6 is fixedly connected to a support base 9, and the sound acquisition module 10 is fixedly connected to the support base 9. In the initial state, the directional rod 8 is parallel to the axial rack 6.

[0044] The connecting column 11 is slidably fitted with a sleeve seat 13, and a relief connecting rod 14 is rotatably mounted on the sleeve seat 13. One end of the relief connecting rod 14 away from the sleeve seat 13 is rotatably mounted on the end rod 8. The axial rack 6 is provided with a torsion spring that drives the end rod 8 to maintain its initial state.

[0045] Multiple sets of axial racks 6 are meshed with a set of side gears 4. The side gears 4 rotate on the inner base claw disk 1 with a fixed axis. Multiple sets of side gears 4 are synchronously meshed with a set of internal gear rings 3. The internal gear rings 3 rotate on the outer ring disk 2 with a fixed axis. A No. 1 motor for driving the internal gear rings 3 to rotate horizontally is fixedly connected to the outer ring disk 2.

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the internal gear ring 3 is driven to rotate horizontally by the No. 1 motor, which in turn causes multiple sets of side gears 4 that are meshed with the internal gear ring 3 to rotate synchronously in the same direction. Each set of side gears 4 is meshed with an axial rack 6, and under the action of the torsion spring set on the axial rack 6, the end rod 8 can always be in the same straight line with the axial rack 6 during the process. The end of the shaft slide groove 7 is fixedly connected to the sound acquisition module 10 through the support seat 9, so that the multiple sets of sound acquisition modules 10 can still maintain the ring array arrangement when synchronously approaching or moving away from the axis of the inner base claw disk 1.

[0047] Meanwhile, when the axial rack 6 slides on the axial groove 7 to move away from the inner base claw disk 1, it can increase the diameter of the annular size formed by multiple sound acquisition modules 10. As the end rod 8 moves away from the inner base claw disk 1 in sync with the axial rack 6, it can cause the sleeve seat 13 to slide on the connecting column 11 through the rotatable relief link 14 on it, so as to cause the sleeve seat 13 to gradually move away from the outer protrusion 201 and drive the relief link 14 to deflect. However, under the action of the torsion spring set between the axial rack 6 and the axial groove 7, even if the distance between the end rod 8 and the axial rack 6 and the axis of the inner base claw disk 1 is different, the end rod 8 and the axial rack 6 can still be parallel and on the same straight line.

[0048] Based on the embodiment of the axis shifting assembly, the swinging assembly includes a central disk 15 that is driven by a second motor and can rotate freely in the horizontal direction. The central disk 15 is coaxially arranged with the inner base claw disk 1, and the central disk 15 rotates on the inner base claw disk 1 with a fixed axis.

[0049] Each of the multiple sets of connecting posts 11 is fixedly connected to a corresponding pin 16 at one end facing the central disk 15. The central disk 15 is provided with an arc-shaped groove 17 for the corresponding pin 16 to slide. A positioning block 12 is fixedly connected to the end of the connecting post 11 away from the corresponding pin 16.

[0050] like Figure 4 and Figure 5 As shown, the center disk 15 is driven to rotate a certain angle in the horizontal direction by the second motor. Since the corresponding pin 16 fixed on the connecting column 11 is slidably connected to the center disk 15 through the arc-shaped slide groove 17, when the center disk 15 rotates, the connecting column 11 can be driven to slide a certain distance on the outer protrusion 201 through the arc-shaped slide groove 17 and the corresponding pin 16.

[0051] At the same time, when the connecting column 11 moves horizontally toward the axis of the inner base claw disk 1, it can drive the positioning block 12 fixed on it to approach the sleeve seat 13 and eventually abut against the sleeve seat 13. As the connecting column 11 continues to move, the positioning block 12 pushes the sleeve seat 13 to gradually approach the outer protrusion 201, thereby causing the clearance link 14 to gradually deflect. After the clearance link 14 reaches the maximum deflection, it can gradually pull the end rod 8, thereby driving the end rod 8 to swing on the shaft slide groove 7, and then through the two sets of support seats 9, it causes the sound acquisition module 10 fixed on it to approach each other.

[0052] 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 vehicle resonance source localization and simulation detection device, comprising an inner base claw disk (1) for supporting multiple sets of sound acquisition modules (10), characterized in that: Multiple sets of sound acquisition modules (10) are arranged in a circular array with the axis of the inner base claw disk (1) as the center. The inner base claw disk (1) is provided with a variable array mechanism to adjust the arrangement of multiple sets of sound acquisition modules (10). The array mechanism includes an outer ring disk (2) coaxially arranged with the inner base claw disk (1). Multiple sets of center rods (5) are fixedly connected to the outer circumferential surface of the inner base claw disk (1). The ends of the multiple sets of center rods (5) away from the inner base claw disk (1) are all fixedly connected to the inner circumferential surface of the outer ring disk (2). The inner base claw disk (1) is provided with an axis shifting component that drives multiple sets of sound acquisition modules (10) to move synchronously towards or away from each other. The outer ring disk (2) includes multiple integrally formed protrusions (201). Each of the multiple protrusions (201) is provided with a connecting post (11) and a circular hole for the connecting post (11) to slide through. The protrusions (201) are provided with a swaying component that drives two adjacent sound acquisition modules (10) to deflect synchronously toward the connecting post (11).

2. The vehicle resonance source localization and simulation detection device according to claim 1, characterized in that: The shaft shifting assembly includes multiple sets of axial racks (6) that move freely in the horizontal direction. The inner base claw disk (1) and the outer ring disk (2) are both provided with shaft position grooves (7) for sliding connection of the axial racks (6). The end of the axial rack (6) away from the inner base claw disk (1) has an end rod (8) that rotates on a fixed axis. The end of the axial rod (8) away from the axial rack (6) is fixedly connected to a support base (9), and the sound acquisition module (10) is fixedly connected to the support base (9); The axial rod (8) is parallel to the axial rack (6) in the initial state.

3. The vehicle resonance source localization and simulation detection device according to claim 2, characterized in that: The connecting column (11) is slidably fitted with a sleeve seat (13), and a relief connecting rod (14) is fixedly rotated on the sleeve seat (13). The end of the relief connecting rod (14) away from the sleeve seat (13) is fixedly rotated on the end rod (8).

4. The vehicle resonance source localization and simulation detection device according to claim 2, characterized in that: The axial rack (6) is provided with a torsion spring that drives the end rod (8) to maintain its initial state.

5. The vehicle resonance source localization and simulation detection device according to claim 3, characterized in that: Multiple sets of axial racks (6) are meshed with a set of side gears (4), the side gears (4) rotate on the inner base claw disk (1) with a fixed axis, and multiple sets of side gears (4) are synchronously meshed with a set of internal gear rings (3), the internal gear rings (3) rotate on the outer ring disk (2) with a fixed axis; A No. 1 motor for driving the internal gear ring (3) to rotate horizontally is fixedly connected to the outer ring disk (2).

6. The vehicle resonance source localization and simulation detection device according to claim 4, characterized in that: The swing assembly includes a central disk (15) that is driven by a second motor and rotates freely in the horizontal direction. The central disk (15) and the inner base claw disk (1) are coaxially arranged, and the central disk (15) rotates on the inner base claw disk (1) with a fixed axis. Each of the multiple sets of connecting columns (11) is fixedly connected to a corresponding pin (16) at one end facing the central disk (15), and the central disk (15) is provided with an arc-shaped groove (17) for the corresponding pin (16) to slide.

7. The vehicle resonance source localization and simulation detection device according to claim 6, characterized in that: The end of the connecting post (11) away from the co-position pin (16) is fixedly connected to a positioning block (12).

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