Intake and exhaust noise test microphone positioning device and noise test equipment

Abstract

The utility model provides an intake and exhaust noise test microphone positioning device and noise test equipment, the intake and exhaust noise test microphone positioning device comprises a substrate, a first positioning member and a second positioning member, the first positioning member is fixedly arranged on the substrate, and the second positioning member is fixedly arranged on the substrate. One end of the second positioning piece is rotatably connected with the first positioning piece, the end, far away from the first positioning piece, of the second positioning piece is used for extending to the microphone, and the projection of the end, connected with the first positioning piece, of the second positioning piece on the substrate coincides with the center of the substrate. The microphone positioning device for the intake and exhaust noise test facilitates unified positioning of the position of the microphone, is high in test efficiency, and is suitable for intake and exhaust ports of different vehicle types.

Description

Technical Field

[0001] The utility model relates to the technical field of noise testing, in particular to an intake and exhaust noise testing microphone positioning device and a noise testing device. Background Technique

[0002] The intake and exhaust systems are two important systems in internal combustion engine vehicles, providing a necessary environment for supporting in-cylinder fuel combustion and suppressing the intake and exhaust noises of the engine. Among them, the intake and exhaust noises are mainly transmitted to the vehicle interior through two paths: airborne sound and structure-borne sound. Among the above transmission methods, the intake and exhaust port noises under the acceleration condition have the greatest impact on the vehicle interior. To understand the intake and exhaust port noise levels under specific working conditions, it is necessary to measure the intake and exhaust port noises. When measuring the intake and exhaust port noises, it is necessary to position and place a microphone based on the center position of the intake and exhaust port plane at a fixed angle and distance. In the prior art, during each noise test, the angle ruler and straight ruler need to be adjusted manually respectively, which is time-consuming and laborious, unable to achieve fine adjustment of the sensor position, and has a slow centering speed and low efficiency. Summary of the Utility Model

[0003] Aiming at the problem of low efficiency in microphone positioning during the existing intake and exhaust noise testing, the utility model provides an intake and exhaust noise testing microphone positioning device and a noise testing device.

[0004] On the one hand, the utility model provides an intake and exhaust noise testing microphone positioning device, including a substrate, a first positioning member and a second positioning member. The first positioning member is fixedly arranged on the substrate. One end of the second positioning member is rotatably connected to the first positioning member. The end of the second positioning member far from the first positioning member is used to extend to the microphone. The projection of the end of the second positioning member connected to the first positioning member on the substrate coincides with the center of the substrate.

[0005] Optionally, the intake and exhaust noise testing microphone positioning device further includes a locking assembly, which is connected between the first positioning member and the second positioning member and is used to fix the included angle between the first positioning member and the second positioning member.

[0006] Optionally, the locking assembly includes a first locking bolt, a first locking nut, a second locking nut, a first clamping block and a second clamping block. One end of the first locking bolt is arranged on the first positioning member, and the other end of the first locking bolt sequentially passes through the first locking nut, the first clamping block, the second positioning member, the second clamping block and the second locking nut;

[0007] The first clamping block and the second clamping block are respectively in contact with the second positioning member; the first locking nut and the second locking nut are respectively threadedly connected to the first locking bolt for fixing the second positioning member between the first clamping block and the second clamping block.

[0008] Optionally, the second positioning member is strip-shaped, and an avoidance hole extending along the length direction of the second positioning member is provided on the second positioning member, and one end of the first locking bolt away from the first positioning member passes through the avoidance hole.

[0009] Optionally, a receiving groove is provided on one side of the second positioning member facing the first clamping block and / or the second clamping block, and the first clamping block and / or the second clamping block is arranged in the receiving groove and abuts against the bottom wall of the receiving groove.

[0010] Optionally, the locking assembly further includes a third locking nut. The first locking bolt passes through the first positioning member. The third locking nut is located on the side of the first positioning member facing the second positioning member. The third locking nut is threadedly connected to the first locking bolt and abuts against the first positioning member.

[0011] Optionally, a notch is provided on the outer edge of the substrate, and one end of the first locking bolt away from the second positioning member is located in the notch.

[0012] Optionally, the locking assembly further includes a second locking bolt and a fourth locking nut, and the fourth locking nut is threadedly connected to the second locking bolt;

[0013] A first connecting support is provided on the side of the first positioning member facing away from the substrate, and a second connecting support is provided at one end of the second positioning member close to the first positioning member. The second connecting support is arranged on one side of the first connecting support; the second locking bolt passes through the first connecting support and the second connecting support to rotatably connect the first positioning member and the second positioning member; the fourth locking nut is arranged on the side of the second connecting support facing away from the first connecting support.

[0014] Optionally, at least two grooves extending in the radial direction of the substrate are provided on the substrate. The two grooves coincide with a diameter of the substrate, and scales are provided in the two grooves. The scales in the two grooves are mirror-symmetrical about the center of the substrate.

[0015] Optionally, a length adjusting assembly is provided at one end of the second positioning member away from the substrate. The length adjusting assembly includes an adjusting plate and at least two third locking bolts. The adjusting plate is arranged parallel to the second positioning member, and a strip-shaped hole extending along the length direction of the adjusting plate is provided on the adjusting plate;

[0016] The two third locking bolts are arranged at intervals in the strip-shaped hole along the extending direction of the adjusting plate, and the screw rod of the third locking bolt is in threaded connection with the second positioning member, and the end of the third locking bolt abuts against the outer edge of the adjusting plate.

[0017] On the other hand, the present utility model further provides a noise testing device, including the intake and exhaust noise testing microphone positioning device described in any one of the above.

[0018] In the present utility model, by placing the substrate at the intake port or the exhaust port, the substrate, the first positioning member and the second positioning member form a coordinate system at the intake port or the exhaust port to measure the position of the microphone. By rotating the second positioning member to the side of the microphone, the angle between the microphone and the plane of the substrate is determined according to the included angle between the first positioning member and the second positioning member, and the distance between the microphone and the intake port or the exhaust port is determined by the projection of the microphone on the second positioning member. The present utility model forms a unified positioning tooling by setting the substrate, the first positioning member and the second positioning member, which is convenient for subsequent fixing of the microphone position. The microphone positioning device is easy to disassemble and install, and is convenient for repeated use, with high testing efficiency. At the same time, the microphone positioning device does not need to consider the influence of the layout forms of the intake and exhaust ports of different vehicle models, has a wide application range, and has high application value. Description of the Drawings

[0019] Figure 1 is a schematic structural view of an intake and exhaust noise testing microphone positioning device provided by an embodiment of the present utility model;

[0020] Figure 2 is a schematic structural view of an intake and exhaust noise testing microphone positioning device from another angle provided by an embodiment of the present utility model;

[0021] Figure 3 is a top view of an intake and exhaust noise testing microphone positioning device provided by an embodiment of the present utility model.

[0022] The reference numerals in the accompanying drawings of the specification are as follows:

[0023] 1. Substrate; 11. Notch; 12. Groove;

[0024] 2. First positioning member;

[0025] 3. Second positioning member; 31. Avoidance hole; 32. Accommodation groove; 33. Second connection support;

[0026] 41. First locking bolt; 42. First locking nut; 43. Second locking nut; 44. First clamping block; 45. Second clamping block; 46. Third locking nut; 47. Second locking bolt; 48. Fourth locking nut;

[0027] 51. Adjusting plate; 511. Strip-shaped hole; 52. Third locking bolt. Detailed implementation manner

[0028] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "circumferential direction", "axial direction", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] In order to illustrate the technical solution of the present utility model, the following will be described through specific embodiments.

[0032] As Figures 1 - 3 shown, a positioning device for an intake and exhaust noise test microphone according to an embodiment of the present utility model includes a substrate 1, a first positioning member 2 and a second positioning member 3. The first positioning member 2 is fixedly arranged on the substrate 1. One end of the second positioning member 3 is rotatably connected to the first positioning member 2. The end of the second positioning member 3 away from the first positioning member 2 is used to extend to the microphone. The projection of the end of the second positioning member 3 connected to the first positioning member 2 on the substrate 1 coincides with the center of the substrate 1.

[0033] In this embodiment, by placing the substrate 1 at the air inlet or the air outlet, the substrate 1, the first positioning member 2, and the second positioning member 3 form a coordinate system at the air inlet or the air outlet to measure the position of the microphone. By rotating the second positioning member 3 to the side of the microphone, the angle between the microphone and the plane where the substrate 1 is located is determined according to the angle between the first positioning member 2 and the second positioning member 3, and the distance between the microphone and the air inlet or the air outlet is determined by the projection of the microphone on the second positioning member 3. The utility model forms a unified positioning tooling by setting the substrate 1, the first positioning member 2, and the second positioning member 3, which is convenient for subsequent fixing of the microphone position. The microphone positioning device is easy to disassemble and install, and is convenient for repeated use, with high test efficiency. At the same time, the microphone positioning device does not need to consider the influence of the inlet and outlet arrangements of different vehicle models, has a wide application range, and has high application value.

[0034] As Figure 1 shown, in some embodiments of the present utility model, the inlet and exhaust noise test microphone positioning device further includes a locking assembly, and the locking assembly is connected between the first positioning member 2 and the second positioning member 3 for fixing the angle between the first positioning member 2 and the second positioning member 3. By setting the locking assembly to fix the angle between the first positioning member 2 and the second positioning member 3, the change of the angle between the second positioning member 3 and the first positioning member 2 is avoided, and a unified positioning tooling is formed, which is convenient for repeatedly using the tooling to position the microphone, and improves the positioning efficiency and positioning accuracy.

[0035] As Figure 1 and Figure 2 shown, in some embodiments of the present utility model, the locking assembly includes a first locking bolt 41, a first locking nut 42, a second locking nut 43, a first clamping block 44, and a second clamping block 45. One end of the first locking bolt 41 is arranged on the first positioning member 2, and the other end of the first locking bolt 41 sequentially passes through the first locking nut 42, the first clamping block 44, the second positioning member 3, the second clamping block 45, and the second locking nut 43.

[0036] The first clamping block 44 and the second clamping block 45 are respectively abutted against the second positioning member 3; the first locking nut 42 and the second locking nut 43 are respectively threadedly connected to the first locking bolt 41 for fixing the second positioning member 3 between the first clamping block 44 and the second clamping block 45.

[0037] In this embodiment, by controlling the positions of the first locking nut 42 and the second locking nut 43 on the first locking bolt 41, the connection relationship between the first clamping block 44 and the second clamping block 45 and the second positioning member 3 is controlled. When the first clamping block 44 and the second clamping block 45 do not abut against the second positioning member 3, the second positioning member 3 can rotate relative to the first positioning member 2 to measure the angle between the microphone and the plane where the substrate 1 is located. When the first clamping block 44 and the second clamping block 45 abut against the second positioning member 3, one end of the first locking bolt 41 away from the second positioning member 3 is arranged on the first positioning member 2, so that the angle between the second positioning member 3 and the first positioning member 2 is fixed.

[0038] Specifically, the surfaces of the first clamping block 44 and the second clamping block 45 that abut against the second positioning member 3 are fitted to the second positioning member 3 to ensure that the first clamping block 44 and the second clamping block 45 clamp the second positioning member 3. The shapes of the first clamping block 44 and the second clamping block 45 include but are not limited to triangular prisms.

[0039] As Figure 3 shown, in some embodiments of the present invention, the second positioning member 3 is strip-shaped, and an avoidance hole 31 extending along the length direction of the second positioning member 3 is arranged on the second positioning member 3. One end of the first locking bolt 41 away from the first positioning member 2 passes through the avoidance hole 31. By providing the avoidance hole 31 and the first locking bolt 41 passing through the avoidance hole 31, when the second positioning member 3 rotates relative to the first positioning member 2, the second positioning member 3 can move downward or upward along the length direction of the first locking bolt 41 to ensure the positioning accuracy. Specifically, the avoidance hole 31 is an oval hole, and the width of the avoidance hole 31 is smaller than the widths of the first clamping block 44 and the second clamping block 45, so as to facilitate the first clamping block 44 and the second clamping block 45 to clamp the second positioning member 3.

[0040] Furthermore, the first positioning member 2 is strip-shaped and extends along the radial direction of the substrate 1.

[0041] As Figure 1 and Figure 3 shown, in some embodiments of the present invention, a receiving groove 32 is arranged on one side of the second positioning member 3 facing the first clamping block 44 and / or the second clamping block 45. The first clamping block 44 and / or the second clamping block 45 is arranged in the receiving groove 32 and abuts against the bottom wall of the receiving groove 32. By arranging the first clamping block 44 and the second clamping block 45 in the receiving groove 32, the structure on the second positioning member 3 is compact and the occupied space is reduced.

[0042] Furthermore, the avoidance hole 31 is arranged at the bottom of the receiving groove 32.

[0043] As Figure 1 andFigure 2 As shown, in some embodiments of the present utility model, the locking assembly further includes a third locking nut 46. The first locking bolt 41 passes through the first positioning member 2. The third locking nut 46 is located on the side of the first positioning member 2 facing the second positioning member 3. The third locking nut 46 is threadedly connected to the first locking bolt 41 and abuts against the first positioning member 2. By providing the third locking nut 46 to fix the first locking bolt 41 on the first positioning member 2, it is convenient to fix the angle between the first positioning member 2 and the second positioning member 3.

[0044] As Figure 1 shown, in some embodiments of the present utility model, a notch 11 is provided on the outer edge of the substrate 1. One end of the first locking bolt 41 away from the second positioning member 3 is located in the notch 11 to prevent the second positioning member 3 from moving relative to the substrate 1.

[0045] As Figure 1 and Figure 2 shown, in some embodiments of the present utility model, the locking assembly further includes a second locking bolt 47 and a fourth locking nut 48. The fourth locking nut 48 is threadedly connected to the second locking bolt 47.

[0046] A first connection support (not shown in the figure) is provided on the side of the first positioning member 2 facing away from the substrate 1. A second connection support 33 is provided at one end of the second positioning member 3 close to the first positioning member 2. The second connection support 33 is provided on one side of the first connection support. The second locking bolt 47 passes through the first connection support and the second connection support 33 to rotatably connect the first positioning member 2 and the second positioning member 3. The fourth locking nut 48 is provided on the side of the second connection support 33 facing away from the first connection support. By controlling the position of the fourth locking nut 48 on the second locking bolt 47, the connection state between the first positioning member 2 and the second positioning member 3 is changed. The fourth locking nut 48 abuts against the second connection support 33, so that the first positioning member 2 and the second positioning member 3 are fixed. When there is a gap between the fourth locking nut 48 and the second connection support 33, the first positioning member 2 and the second positioning member 3 can rotate relative to each other.

[0047] It should be noted here that the first positioning member 2 and the second positioning member 3 can also be hinged. By providing a friction plate between the first positioning member 2 and the second positioning member 3, the angle between the first positioning member 2 and the second positioning member 3 is ensured.

[0048] As Figure 1 and Figure 3As shown, in some embodiments of the present utility model, at least two grooves 12 extending along the radial direction of the substrate 1 are provided on the substrate 1. The two grooves 12 coincide with a diameter of the substrate 1, and scales (not shown in the figure) are provided in the two grooves 12. The scales in the two grooves 12 are mirror-symmetrical about the center of the substrate 1. When the substrate 1 is placed on the plane of the air inlet or the air outlet, when the scale numbers corresponding to the two grooves 12 of the air inlet or the air outlet are the same, the center of the substrate 1 coincides with the center of the air inlet or the air outlet. By providing the grooves 12 and the scales, it is convenient to determine the center of the air inlet or the air outlet, so as to further measure the position of the microphone. It solves the problem that the air inlet and the air outlet are displaced midway during the experiment and the position of the microphone cannot be quickly adjusted, and greatly improves the work efficiency.

[0049] It should be noted here that the substrate 1 can also be a circular plate, a square plate or other regular polygon plates.

[0050] As Figure 1 As shown, in some embodiments of the present utility model, a length adjustment assembly is provided at one end of the second positioning member 3 away from the substrate 1. The length adjustment assembly includes an adjustment plate 51 and at least two third locking bolts 52. The adjustment plate 51 is arranged in parallel with the second positioning member 3, and a strip-shaped hole 511 extending along the length direction of the adjustment plate 51 is provided on the adjustment plate 51.

[0051] The two third locking bolts 52 are arranged at intervals in the strip-shaped hole 511 along the extending direction of the adjustment plate 51, and the screw rod of the third locking bolt 52 is threadedly connected with the second positioning member 3, and the end of the third locking bolt 52 abuts against the outer edge of the adjustment plate 51.

[0052] When the length of the second positioning member 3 is not enough to contact the microphone, by providing the adjustment plate 51, the length of the second positioning member 3 is increased to facilitate measuring the distance from the microphone to the air inlet and the air outlet.

[0053] On the other hand, a noise test device according to an embodiment of the present utility model includes an air inlet and outlet noise test microphone positioning device according to any one of the above embodiments.

[0054] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model, and should all be included in the protection scope of the present utility model.

Claims

1. A microphone positioning device for intake and exhaust noise testing, characterized in that: It includes a substrate, a first positioning member and a second positioning member, the first positioning member is fixedly arranged on the substrate, one end of the second positioning member is rotatably connected to the first positioning member, one end of the second positioning member away from the first positioning member is used to extend to the microphone, and the projection of the end of the second positioning member connected to the first positioning member on the substrate coincides with the center of the substrate.

2. The microphone positioning device for intake and exhaust noise testing according to claim 1, characterized in that: The intake and exhaust noise test microphone positioning device also includes a locking assembly, which is connected between the first positioning member and the second positioning member and is used to fix the angle between the first positioning member and the second positioning member.

3. The microphone positioning device for intake and exhaust noise testing according to claim 2, characterized in that: The locking assembly comprises a first locking bolt, a first locking nut, a second locking nut, a first clamping block and a second clamping block, one end of the first locking bolt is arranged on the first positioning member, and the other end of the first locking bolt passes through the first locking nut, the first clamping block, the second positioning member, the second clamping block and the second locking nut in sequence; The first clamping block and the second clamping block are respectively in contact with the second positioning member; the first locking nut and the second locking nut are respectively threadedly connected with the first locking bolt to fix the second positioning member between the first clamping block and the second clamping block.

4. The microphone positioning device for testing intake and exhaust noise according to claim 3, characterized in that: The second positioning member is in a strip shape, and is provided with an avoidance hole extending along the length direction of the second positioning member, and one end of the first locking bolt away from the first positioning member passes through the avoidance hole.

5. The microphone positioning device for testing intake and exhaust noise according to claim 3, characterized in that: A receiving groove is provided on one side of the second positioning member facing the first clamping block and / or the second clamping block. The first clamping block and / or the second clamping block are arranged in the receiving groove and abut against the bottom wall of the receiving groove.

6. The microphone positioning device for testing intake and exhaust noise according to claim 3, characterized in that: The locking assembly also includes a third locking nut. The first locking bolt passes through the first positioning member. The third locking nut is located on the side of the first positioning member facing the second positioning member. The third locking nut is threadedly connected to the first locking bolt and abuts against the first positioning member.

7. The microphone positioning device for testing intake and exhaust noise according to claim 6, characterized in that: A notch is provided at the outer edge of the base plate, and one end of the first locking bolt away from the second positioning member is located in the notch.

8. The microphone positioning device for testing intake and exhaust noise according to claim 2, characterized in that: The locking assembly further comprises a second locking bolt and a fourth locking nut, wherein the fourth locking nut is threadedly connected to the second locking bolt; A first connecting support is provided on a side of the first positioning member facing away from the substrate, a second connecting support is provided on an end of the second positioning member close to the first positioning member, and the second connecting support is provided on one side of the first connecting support; the second locking bolt passes through the first connecting support and the second connecting support to rotatably connect the first positioning member to the second positioning member; the fourth locking nut is provided on a side of the second connecting support facing away from the first connecting support.

9. The microphone positioning device for testing intake and exhaust noise according to claim 1, characterized in that: The substrate is provided with at least two grooves extending in the radial direction of the substrate, the two grooves coincide with a diameter of the substrate, and scales are provided in the two grooves, and the scales in the two grooves are mirror-symmetrical about the center of the substrate.

10. The microphone positioning device for intake and exhaust noise testing according to claim 1, characterized in that: A length adjustment assembly is provided at one end of the second positioning member away from the base plate, the length adjustment assembly includes an adjustment plate and at least two third locking bolts, the adjustment plate is arranged parallel to the second positioning member, and a strip hole extending along the length direction of the adjustment plate is provided on the adjustment plate; The two third locking bolts are spaced apart in the strip hole along the extension direction of the adjustment plate, and the screw of the third locking bolt is threadedly connected to the second positioning member, and the end of the third locking bolt abuts against the outer edge of the adjustment plate.

11. A noise testing device, characterized in that: The invention comprises a microphone positioning device for testing intake and exhaust noise according to any one of claims 1 to 10.

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