Auxiliary clamp and supporting device for acoustic test
By designing auxiliary fixtures for acoustic testing, including plate and column bracket structures, the problems of cumbersome preparation and sound field interference during multi-device testing were solved, achieving efficient and accurate acoustic measurements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA NAT ENVIRONMENTAL MONITORING CENT
- Filing Date
- 2025-06-11
- Publication Date
- 2026-05-12
AI Technical Summary
Existing acoustic testing support devices can only accommodate a single acoustic measurement device, resulting in cumbersome preparation and low efficiency when testing multiple devices. Furthermore, the presence of multiple support devices in the sound field can easily interfere with sound waves, affecting the accuracy of the test results.
Design an auxiliary fixture, including a plate and a vertically connected column. The column has a slot at the far end for holding microphones, which can support multiple microphones at the same time. It is connected to the support through mounting holes, which reduces the number of supports in the sound field space, simplifies test preparation and finishing work, and reduces the interference of large objects on the sound field.
It enables efficient preparation and completion of simultaneous testing with multiple acoustic measurement devices, improves the accuracy of test results, and reduces the risk of interference with the acoustic field environment.
Smart Images
Figure CN224233846U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of acoustic testing technology, and in particular to an auxiliary fixture and support device for acoustic testing. Background Technology
[0002] Acoustic measurement equipment (such as noise meters) needs to be tested to evaluate its functions and characteristics. During the test, a support device needs to be placed in the sound field space (such as an anechoic chamber) in advance, and the support device will hold the equipment under test in the required position.
[0003] Currently, the support devices used for acoustic testing can usually only hold a single acoustic measuring device. When multiple acoustic measuring devices need to be tested simultaneously, it is necessary to add support devices to the sound field space. This makes the test preparation and finishing work cumbersome and inefficient. On the other hand, there is a risk that the sound waves may be reflected due to the entry of multiple large objects (i.e. support devices) into the sound field, thereby interfering with the sound field environment and affecting the accuracy of the test results. Utility Model Content
[0004] In view of this, one objective of this utility model is to provide an auxiliary fixture for acoustic testing, so as to better meet the needs of simultaneous testing of multiple acoustic measuring devices, improve the efficiency of test preparation and completion, and reduce the risk of interference with the acoustic field environment. Another objective of this utility model is to provide a support device including the above-mentioned auxiliary fixture.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] An auxiliary fixture for acoustic testing includes:
[0007] The plate body has a mounting hole in the middle for fixed connection with a support that supports the auxiliary clamp;
[0008] At least two columns, the columns being perpendicular to the plate and connected to the side of the plate facing away from the support;
[0009] Each column is provided with a corresponding mounting bracket. The mounting bracket is connected to the end of the column away from the plate. The mounting bracket has a clamping part for clamping and fixing the microphone.
[0010] Optionally, in the above-mentioned auxiliary fixture, the column is rotatably connected to the plate, and the axis of rotation of the column relative to the plate is the central axis of the column.
[0011] Optionally, in the above-mentioned auxiliary fixture, the card holder is rotatably connected to the column, and the axis of rotation of the card holder relative to the column intersects perpendicularly with the central axis of the column;
[0012] The auxiliary clamp includes a locking element for locking and fixing the card holder to the column.
[0013] Optionally, in the above-mentioned auxiliary clamp, the upper end of the column is provided with a groove, the card holder is provided with a connecting part located in the groove, the connecting part is provided with a first hinge hole, the card holder is provided with a second hinge hole aligned with the first hinge hole, and the locking member is provided as a bolt passing through the first hinge hole and the second hinge hole.
[0014] Optionally, in the above-mentioned auxiliary fixture, the end face of the locking member is provided with a slot for cooperating with the tool, and the slot penetrates the locking member radially.
[0015] Optionally, in the above-mentioned auxiliary clamp, the number of slots is set to two or more, and the slots are distributed circumferentially along the locking member at equal intervals.
[0016] Optionally, in the above-mentioned auxiliary fixture, the number of columns is not less than three, and the columns are arranged in a straight line at equal intervals.
[0017] Optionally, in the above-mentioned auxiliary fixture, the number of the columns is even, and they are symmetrically distributed on both sides of the mounting hole.
[0018] Optionally, in the above-mentioned auxiliary fixture, the number of mounting holes is not less than two, and the arrangement direction of the mounting holes is perpendicular to the arrangement direction of the column.
[0019] A support device for acoustic testing, comprising:
[0020] The column has a support base at its lower end and a carrier at its upper end.
[0021] An auxiliary clamp, wherein the auxiliary clamp is any of the auxiliary clamps disclosed above, and the plate is fixedly connected to the carrier.
[0022] The auxiliary fixture for acoustic testing provided by this utility model has the following beneficial effects:
[0023] The auxiliary fixture of this invention includes a plate for connecting to a support structure supporting the auxiliary fixture and two or more columns connected to the side of the plate facing away from the support structure. Each column has a holder with a clamping part connected to its end away from the plate. These holders can simultaneously support multiple microphones; each sensor is individually placed in the clamping part of its corresponding holder. Thus, the same auxiliary fixture can simultaneously hold two or more microphones. This reduces the number of supports needed in the sound field when simultaneously testing multiple acoustic measurement devices. This simplifies test preparation and cleanup (mainly the placement and removal of supports), improving work efficiency. Furthermore, it reduces the risk of interference from large objects (mainly supports) in the sound field environment, improving the accuracy of test results. In summary, the auxiliary fixture of this invention better meets the needs of simultaneous testing of multiple acoustic measurement devices, improves the efficiency of test preparation and cleanup, and reduces the risk of interference in the sound field environment. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0025] Figure 1 This is a three-dimensional schematic diagram of an auxiliary fixture for acoustic testing according to an embodiment of the present utility model;
[0026] Figure 2 yes Figure 1 The front view of the auxiliary fixture shown;
[0027] Figure 3 yes Figure 2 Top view;
[0028] Figure 4 yes Figure 2 A bottom view;
[0029] Figure 5 yes Figure 2 The left view;
[0030] Figure 6 This is a schematic diagram of the end face of the locking member of the connecting column and the card seat according to an embodiment of the present utility model;
[0031] Figure 7 This is a schematic diagram of another end face of the locking member connecting the column and the card seat according to an embodiment of the present utility model;
[0032] Figure 8This is a schematic diagram of a support device for acoustic testing according to an embodiment of the present invention.
[0033] The diagram is marked as follows:
[0034] 100, Plate; 101, Mounting hole; 200, Column; 300, Card holder; 310, Clamping part; 320, Connecting part; 400, Fastener; 500, Locking part; 501, Slot; 600, Carrier; 700, Column; 800, Base. Detailed Implementation
[0035] 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.
[0036] See Figures 1-5 This utility model provides an auxiliary fixture for acoustic testing, including a plate 100, at least two columns 200, and a mounting base 300 corresponding to each column 200. The plate 100 has a mounting hole 101 in its middle for fixed connection with a support (e.g., a column 700 described later) for supporting the auxiliary fixture. The columns 200 are perpendicular to the plate 100 and connected to the side of the plate 100 facing away from the support. The mounting base 300 connects to the end of the column 200 away from the plate 100 and has a clamping part 310 for clamping and fixing a microphone.
[0037] When using the auxiliary fixture of this utility model, the auxiliary fixture can be connected to the support in the sound field space (e.g., an anechoic chamber) through the mounting holes 101 on the plate 100. Then, multiple microphones can be simultaneously supported by the multiple card holders 300 of the auxiliary fixture. That is, each sensor is placed separately in the clamping part 310 of its corresponding card holder 300. In this way, two or more microphones can be clamped by the same auxiliary fixture at the same time. Therefore, when testing multiple acoustic measurement devices at the same time, the number of supports that need to be placed in the sound field space can be reduced. This not only simplifies the test preparation and finishing work (mainly the placement and removal of supports), improving work efficiency, but also reduces the risk of the sound field environment being interfered with by large objects (mainly supports), thus improving the accuracy of the test results.
[0038] It should be noted that a microphone, also known as a transducer, is a sensor used for acoustic measurements. Its main function is to convert the measured sound signal into an electrical signal. The microphone can be connected to the acoustic measuring device being measured via a cable. Therefore, the acoustic measuring device does not need to be placed on the aforementioned auxiliary fixture. The auxiliary fixture only needs to provide placement positions for at least two microphones.
[0039] exist Figure 1 and Figure 2 In the exemplary embodiment shown, the clamping portion 310 of the card holder 300 can be configured as a tubular structure with a notch on the side, which facilitates the insertion of the microphone into the clamping portion 310. Of course, in other embodiments, the clamping portion 310 of the card holder 300 can also be configured as a circumferentially closed tubular structure. This utility model does not limit the structural form of the clamping portion 310, as long as it can fix the microphone on the card holder 300.
[0040] In some embodiments, the column 200 of the auxiliary clamp is rotatably connected to the plate 100, and the axis of rotation of the column 200 relative to the plate 100 can be the central axis of the column 200. In this structure, the column 200 can rotate relative to the plate 100 about its own central axis. Thus, the direction in which the microphone faces through the holder 300 can be adjusted by rotating the column 200, thereby quickly adjusting the microphone to the desired orientation.
[0041] See Figure 4 In some embodiments, a fastener 400 for connecting the column 200 may be provided on the side of the plate 100 facing away from the column 200. When it is necessary to rotate the column 200 relative to the plate 100, the connection between the fastener 400 and the column 200 can be first released or loosened, and the fastener 400 can be tightened after the column 200 rotates relative to the plate 100. The fastener 400 reduces the risk of accidental rotation of the column 200. In some embodiments, the fastener 400 may be a screw, bolt, etc. Of course, in other embodiments, the column 200 may also use the friction between itself and the plate 100 to avoid accidental rotation. In this structure, the fastener 400 can be omitted.
[0042] In some embodiments, the holder 300 of the auxiliary clamp is rotatably connected to the column 200, and the axis of rotation of the holder 300 relative to the column 200 may be perpendicular to the central axis of the column 200. The auxiliary clamp may include a locking member 500 for locking the holder 300 to the column 200. It is readily understood that during the use of the auxiliary clamp, the plate 100 of the auxiliary clamp is typically arranged horizontally. Therefore, the axis of rotation of the holder 300 relative to the column 200 is approximately horizontal, meaning the holder 300 rotates vertically relative to the column 200. This allows adjustment of the direction in which the microphone faces from the holder 300, thereby quickly adjusting the microphone to the desired orientation.
[0043] With the plate 100 arranged horizontally, the mounting base 300 rotates vertically relative to the column 200, causing a change in the angle of the microphone on the mounting base 300 relative to the horizontal plane. In other words, the microphone pitches during the rotation of the mounting base 300 relative to the column 200. After the microphone is adjusted to a certain pitch angle, to ensure that the microphone maintains this pitch angle effectively and to prevent automatic pitch angle changes under gravity, the auxiliary fixture is equipped with the aforementioned locking element 500. It should be understood that when adjusting the microphone's pitch angle, the locking element 500 must first be released from its lock on the mounting base 300 and the column 200.
[0044] In some embodiments, the upper end of the column 200 may be provided with a groove, the card holder 300 may be provided with a connecting portion 320 located in the groove, the connecting portion 320 may have a first hinge hole, the card holder 300 may have a second hinge hole aligned with the first hinge hole, and the locking member 500 may be configured as a bolt passing through the first hinge hole and the second hinge hole. See also Figure 2 As the locking member 500 is gradually tightened, the two parts forming the groove at the upper end of the column 200 move closer together and gradually clamp the connecting part 320 of the holder 300. The clamping force prevents the holder 300 from rotating relative to the column 200, thus allowing the microphone on the holder 300 to maintain its current pitch angle. Conversely, as the locking member 500 is gradually loosened, the two parts forming the groove at the upper end of the column 200 gradually release the connecting part 320 of the holder 300, thereby releasing the locking member 500 from locking the holder 300 and the column 200, allowing adjustment of the microphone's pitch angle.
[0045] To facilitate tightening and loosening of the locking member 500 using tools, the end face of the locking member 500 may be provided with a slot 501 for engaging with the tool. The slot 501 extends radially through the locking member 500. See also Figure 2 and Figure 5To minimize the overall space occupied by the auxiliary fixture, the columns 200 should be arranged as compactly as possible, i.e., the spacing between the columns 200 should be as small as possible. In this case, a locking element 500 can be provided to protrude from the outer surface of the column 200. Since the slot 501 passes through the locking element 500 radially, a small rod-shaped tool can be inserted from one end of the slot 501. That is, the rod-shaped tool is perpendicular to the relative rotation axis of the card holder 300 and the column 200, so that the tool can be operated in a wider space outside the column 200 to tighten and loosen the locking element 500.
[0046] In some embodiments, the number of slots 501 may be two or more, and these slots 501 are distributed angularly at equal intervals along the circumference of the locking member 500. See also Figure 7 The number of slots 501 can be two, arranged in a cross shape. When there are more than three slots 501, the slots 501 are spaced at equal intervals along the circumference of the locking member 500. The interval angle is the angle between the length directions of two slots 501. For example, in... Figure 7 In the illustrated embodiment, the included angle between the length directions of the two slots 501 is 90°, and therefore the interval angle between the two slots 501 along the circumference of the locking member 500 is 90°.
[0047] Of course, in other embodiments, the card holder 300 and the column 200 can also be rotatably connected through other structural forms. For example, the connecting part 320 of the card holder 300 can be set as a sphere, and the end of the column 200 can be provided with a ball-and-socket structure formed by multiple claws. The locking member 500 can be set as an adjusting nut sleeved on the outside of these claws. In this structure, the card holder 300 and the column 200 form a ball joint connection through the spherical connecting part 320, so that the card holder 300 can rotate relative to the column 200, thereby adjusting the direction in which the speaker is facing through the card holder 300.
[0048] In some embodiments, the auxiliary clamp may have at least three columns 200, which are arranged in a straight line at equal intervals. For example, in Figure 1 and Figure 2 In the illustrated embodiment, the number of pillars 200 is set to four, arranged in a straight line with equal spacing. When the number of pillars 200 is not less than three, the number of pillars 200 can be set to an even number, and these pillars 200 can be symmetrically distributed on both sides of the mounting hole 101. This arrangement allows for a more balanced overall mass distribution of the auxiliary fixture. See also... Figure 3In some embodiments, the number of mounting holes 101 may be no less than two, and the arrangement direction of the mounting holes 101 is perpendicular to the arrangement direction of the column 200. This arrangement can improve the stability of the plate 100 when mounted on the support.
[0049] See Figures 1-8 Based on the auxiliary fixture for acoustic testing provided by this utility model, this utility model also provides a support device for acoustic testing. This support device may include a column 700 and the auxiliary fixture described in any of the above embodiments. A support base 800 is provided at the lower end of the column 700, and a carrier 600 is provided at the upper end. The plate 100 of the auxiliary fixture is fixedly connected to the carrier 600. The structural form of the auxiliary fixture can be referred to the previous description of the auxiliary fixture, and will not be repeated here. Since the auxiliary fixture disclosed in the above embodiments has the above-mentioned technical effects, the support device with the auxiliary fixture also has the above-mentioned technical effects, and will not be repeated here.
[0050] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An auxiliary fixture for acoustic testing, comprising: The plate body has a mounting hole in the middle for fixed connection with a support that supports the auxiliary clamp; At least two columns, the columns being perpendicular to the plate and connected to the side of the plate facing away from the support; Each column is provided with a corresponding mounting bracket. The mounting bracket is connected to the end of the column away from the plate. The mounting bracket has a clamping part for clamping and fixing the microphone.
2. The auxiliary clamp according to claim 1, characterized in that, The column is rotatably connected to the plate, and the axis of rotation of the column relative to the plate is the central axis of the column.
3. The auxiliary clamp according to claim 2, characterized in that, The card holder is rotatably connected to the column, and the axis of rotation of the card holder relative to the column intersects perpendicularly with the central axis of the column; The auxiliary clamp includes a locking element for locking and fixing the card holder to the column.
4. The auxiliary clamp according to claim 3, characterized in that, The upper end of the column is provided with a groove, the card holder is provided with a connecting part located in the groove, the connecting part is provided with a first hinge hole, the card holder is provided with a second hinge hole aligned with the first hinge hole, and the locking member is provided as a bolt passing through the first hinge hole and the second hinge hole.
5. The auxiliary clamp according to claim 4, characterized in that, The end face of the locking member is provided with a slot for cooperating with a tool, and the slot passes through the locking member radially.
6. The auxiliary clamp according to claim 5, characterized in that, The number of slots is set to two or more, and the slots are distributed circumferentially along the locking member at equal intervals.
7. The auxiliary clamp according to any one of claims 1 to 6, characterized in that, The number of columns is no less than three, and the columns are arranged in a straight line at equal intervals.
8. The auxiliary clamp according to claim 7, characterized in that, The number of the columns is even, and they are symmetrically distributed on both sides of the mounting hole.
9. The auxiliary clamp according to claim 8, characterized in that, The number of mounting holes is not less than two, and the arrangement direction of the mounting holes is perpendicular to the arrangement direction of the column.
10. A support device for acoustic testing, characterized in that, include: The column has a support base at its lower end and a carrier at its upper end. An auxiliary clamp, wherein the auxiliary clamp is as described in any one of claims 1 to 9, and the plate is fixedly connected to the carrier.