A support for use in an anechoic chamber, an acoustic testing system

Abstract

This utility model discloses a support and acoustic testing system used inside an anechoic chamber. The support includes a telescopic rod, a linkage mechanism, and a tray. The telescopic rod has a fixed rod and a movable rod that are slidably engaged. One end of the fixed rod is provided with a fixing part for fixed connection with the side wall of the anechoic chamber. The linkage mechanism includes a guide rod fixedly connected to the movable rod, a swing rod hinged to the guide rod, and a push rod diagonally supported between the guide rod and the swing rod. One end of the push rod is hinged to the swing rod, and the other end is hinged to a slider slidably disposed on the guide rod. The slider is provided with a locking element for locking the slider. The tray is used to place the test object for acoustic testing, and the bottom of the tray is connected to the swing rod. The support of this utility model can easily adjust the position of the test object inside the anechoic chamber, thereby improving the efficiency of acoustic testing.

Description

Technical Field

[0001] This utility model relates to the field of acoustic testing technology, and in particular to a bracket and acoustic testing system used in an anechoic chamber. Background Technology

[0002] An anechoic chamber is a noise reduction device used for acoustic testing. Its main function is to reduce ambient noise through sound insulation materials, providing a precise acoustic testing environment. During testing, the placement of the test object (such as electroacoustic components, small electronic products, etc.) is crucial and requires frequent adjustments to suit the specific test requirements. However, the support devices currently used inside anechoic chambers do not allow for convenient adjustment of the test object's position within the chamber. Utility Model Content

[0003] In view of this, one objective of this utility model is to provide a bracket for use inside an anechoic chamber, so as to facilitate the adjustment of the position of the test object inside the anechoic chamber, thereby improving the efficiency of acoustic testing. Another objective of this utility model is to provide an acoustic testing system including the aforementioned bracket.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A support frame used inside a silencer enclosure includes:

[0006] The telescopic rod has a fixed rod and a movable rod that are slidably engaged, and one end of the fixed rod is provided with a fixing part for fixed connection with the side wall of the silencer box;

[0007] The linkage mechanism includes a guide rod fixedly connected to the movable rod, a swing rod hinged to the guide rod, and a push rod braced between the guide rod and the swing rod. One end of the push rod is hinged to the swing rod, and the other end is hinged to a slider slidably disposed on the guide rod. The slider is provided with a locking member for locking the slider.

[0008] A tray for holding the test object to be tested for acoustic testing, the bottom of the tray being connected to the swing rod.

[0009] Optionally, in the above-mentioned bracket, a motor for driving the movable rod is provided inside the fixed rod.

[0010] Optionally, in the above-mentioned bracket, the fixing part is configured as a flange structure.

[0011] Optionally, in the above-mentioned bracket, the locking element is a hand-tightening screw, one end of which is provided with a hand-tightening operation part, and the other end is used to abut against the guide rod to lock the slider.

[0012] Optionally, in the above-mentioned bracket, the linkage mechanism includes at least one auxiliary rod arranged parallel to the swing rod, and the auxiliary rod, the swing rod, the guide rod and the tray form a parallelogram mechanism.

[0013] Optionally, in the above-mentioned bracket, the linkage mechanism includes a crossbar arranged parallel to the guide rod, the swing rod and the auxiliary rod are both hinged to the crossbar, and the crossbar is fixedly connected to the tray by fasteners.

[0014] Optionally, in the above-mentioned bracket, the bottom of the tray is provided with an elongated groove, and the crossbar is fitted into the groove.

[0015] Optionally, in the above-mentioned bracket, the bottom of the tray is provided with two protrusions, and the two protrusions are respectively hinged to the auxiliary rod and the swing rod.

[0016] An acoustic testing system, comprising:

[0017] Silencer box;

[0018] A support, located inside the anechoic chamber, is used to support the test object, and the support is as disclosed in any of the above.

[0019] Optionally, the above acoustic testing system includes:

[0020] The remote control receiver, located outside the anechoic chamber, is electrically connected to the telescopic rod of the bracket via a cable, and is used to receive control signals that control the telescopic rod to extend or retract.

[0021] The support frame used inside the silencer box provided by this utility model has the following beneficial effects:

[0022] The support of this utility model includes a telescopic rod and a linkage mechanism connecting the telescopic rod and a tray. The tray is used to place the test object for acoustic testing. Both the telescopic rod and the linkage mechanism have adjustable deformation functions, thus allowing for convenient adjustment of the tray's position within the anechoic chamber, and consequently, the position of the test object within the anechoic chamber. Compared with traditional support devices used in anechoic chambers, this improves the efficiency of acoustic testing. Attached Figure Description

[0023] 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.

[0024] Figure 1This is a schematic diagram of the support used inside the silencer according to an embodiment of the present utility model;

[0025] Figure 2 This is a bottom view of a tray according to an embodiment of the present utility model, showing the first structural form of the tray;

[0026] Figure 3 This is a side view of a tray according to another embodiment of the present invention, showing a second structural form of the tray.

[0027] The diagram is marked as follows:

[0028] 100. Telescopic rod; 110. Fixed rod; 111. Fixing part; 112. Mounting hole; 120. Movable rod;

[0029] 200. Extension rod;

[0030] 310. Guide rod; 320. Swing rod; 330. Push rod; 340. Slider; 350. Locking element; 360. Auxiliary rod;

[0031] 400, tray; 411, groove; 412, fixing hole; 421, protrusion; 422, hinge hole;

[0032] 500. Remote control receiver; 600. Cable. Detailed Implementation

[0033] 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.

[0034] See Figure 1 This utility model provides a support for use inside an anechoic chamber, including a telescopic rod 100, a linkage mechanism, and a tray 400. The telescopic rod 100 has a fixed rod 110 and a movable rod 120 that are slidably engaged. One end of the fixed rod 110 is provided with a fixing part 111 for fixed connection to the side wall of the anechoic chamber. The linkage mechanism includes a guide rod 310 fixedly connected to the movable rod 120, a swing rod 320 hinged to the guide rod 310, and a push rod 330 diagonally supported between the guide rod 310 and the swing rod 320. One end of the push rod 330 is hinged to the swing rod 320, and the other end is hinged to a slider 340 slidably disposed on the guide rod 310. The slider 340 is provided with a locking member 350 for locking the slider 340. The tray 400 is used to place the test object for acoustic testing, and the bottom of the tray 400 is connected to the swing rod 320.

[0035] The fixed rod 110 of the telescopic rod 100 is fixedly connected to the side wall of the silencer box. The movable rod 120 can slide relative to the fixed rod 110, thereby realizing the extension and retraction of the telescopic rod 100. It is easy to understand that during the extension of the telescopic rod 100, the distance between the tray 400 and the side wall connected to the fixed rod 110 increases, and conversely, during the retraction of the telescopic rod 100, the distance between the tray 400 and the side wall connected to the fixed rod 110 decreases. After the locking member 350 is released, the slider 340 can slide relative to the guide rod 310. During this process, the slider 340 drives the swing rod 320 to rotate relative to the guide rod 310 via the push rod 330. Figure 1 As shown, during the sliding motion of slider 340 relative to guide rod 310 to the right, swing rod 320 rotates clockwise relative to guide rod 310 under the push of push rod 330. Conversely, during the sliding motion of slider 340 relative to guide rod 310 to the left, swing rod 320 rotates counterclockwise relative to guide rod 310 under the pull of push rod 330. It is easy to understand that during the rotation of swing rod 320, the position of tray 400 connected to swing rod 320 changes, thus... Figure 1 There are also changes in the left and right directions. Figure 1 Changes in the vertical direction.

[0036] The test object is placed on tray 400 for acoustic testing. When it is necessary to adjust the position of the test object inside the anechoic chamber, the operator can adjust the length of the telescopic rod 100, adjust the position of the slider 340 on the guide rod 310, or a combination of the two methods to quickly find the position matching the sound source, thus meeting the needs of different testing scenarios and improving the flexibility and accuracy of the test. Therefore, the bracket of this invention can conveniently adjust the position of the test object inside the anechoic chamber, thereby improving the efficiency of acoustic testing.

[0037] It should be noted that, in order to minimize the reflection of sound sources within the anechoic chamber by the support itself and to avoid damaging the testing environment due to sound reflection, the dimensions of the non-critical components of the support can be made as small as possible to reduce the overall size of the support. For example, while ensuring the structural strength meets the usage requirements, the cross-sectional dimensions of the telescopic rod 100 can be made as small as possible. Similarly, making the cross-sectional dimensions of the guide rod 310, push rod 330, and swing rod 320 as small as possible also helps to reduce sound source reflection.

[0038] In some embodiments, the telescopic rod 100 can be configured as electrically operated, meaning its extension and retraction are electrically adjusted. For example, a motor for driving the movable rod 120 can be housed inside the fixed rod 110. It should be noted that the motor and the movable rod 120 are transmitted via a conventional screw-nut mechanism, which will not be detailed here. It should be understood that the extension and retraction of the telescopic rod 100 can be achieved by the forward and reverse rotation of the motor, respectively; that is, forward rotation of the motor extends the telescopic rod 100, and reverse rotation retracts it. Of course, in other embodiments, the telescopic rod 100 can also be configured as manually operated, meaning its extension and retraction are manually adjusted by a worker. However, configuring the telescopic rod 100 electrically is more convenient than manually, saves manpower, and provides higher adjustment precision.

[0039] like Figure 1 As shown, in some embodiments, the fixing part 111 of the fixing rod 110 can be configured as a flange structure. The fixing part 111 of the fixing rod 110 is provided with a mounting hole 112, and the fixing rod 110 is fixed to the side wall of the muffler box by fasteners passing through the mounting hole 112. Of course, in other embodiments, the fixing part 111 of the fixing rod 110 can also be configured with other structural forms, such as a plug-like form, which is inserted into a insertion hole on the side wall of the muffler box to fix the fixing rod 110 to the side wall of the muffler box. The flange structure of the fixing part 111 of the fixing rod 110 allows the fixing rod 110 to be more securely connected to the side wall of the muffler box, thereby improving the reliability of the support.

[0040] In some embodiments, the locking member 350 can be a hand-tightening screw, with one end having a hand-tightening operation part and the other end used to abut against the guide rod 310 to lock the slider 340. It is easy to understand that after the hand-tightening screw is loosened, the locking of the slider 340 is released, allowing the slider 340 to slide relative to the guide rod 310. After sliding to the desired position, tightening the hand-tightening screw will lock the slider 340 in that position. The hand-tightening screw is simple to operate and requires no tools, thus improving work efficiency. Of course, in other embodiments, the locking member 350 can be configured in other forms. For example, the locking member 350 can be a clamp, which locks the slider 340 by gripping the guide rod 310. When it is necessary to adjust the position of the slider 340 on the guide rod 310, the clamp is first loosened to release the guide rod 310, and then the slider 340 can be slid.

[0041] like Figure 1As shown, in some embodiments, the slider 340 can be configured as a collar, sleeved on the surface of the guide rod 310. In this structure, the slider 340 occupies a relatively small volume, and the sliding movement of the slider 340 relative to the guide rod 310 is more stable. Of course, in other embodiments, the slider 340 can be configured in other forms. For example, the slider 340 is provided with a dovetail tenon, which is fitted into a dovetail groove provided in the guide rod 310, thereby realizing the sliding fit between the slider 340 and the guide rod 310.

[0042] In some embodiments, the linkage mechanism may include at least one auxiliary rod 360 arranged parallel to the swing rod 320, and the auxiliary rod 360, the swing rod 320, the guide rod 310 and the tray 400 form a parallelogram mechanism. Figure 1 The example illustrates the case where the auxiliary rod 360 is set to one. It is easy to understand that when the slider 340 drives the swing rod 320 to rotate relative to the guide rod 310 via the push rod 330, the auxiliary rod 360 and the swing rod 320 perform the same movement. Moreover, the angle between the tray 400 and the horizontal plane does not change. Therefore, compared with the case where the auxiliary rod 360 is not set, the trouble of adjusting the angle between the tray 400 and the horizontal plane can be eliminated, further improving the convenience of the bracket.

[0043] It should be noted that without the auxiliary rod 360, the tray 400 is supported solely by the swing rod 320. The tray 400 and the swing rod 320 are detachably fixed, for example, by bolts. After adjusting the position of the slider 340 on the guide rod 310, the operator needs to adjust the angle between the tray 400 and the horizontal plane to ensure that the tray 400 can reliably support the test object, making the tray 400 as horizontal as possible. With the auxiliary rod 360, since the auxiliary rod 360, swing rod 320, guide rod 310, and tray 400 form a parallelogram mechanism, as long as the guide rod 310 is parallel to the horizontal plane during the initial installation of the bracket, it is not necessary to adjust the angle between the tray 400 and the horizontal plane when adjusting the position of the slider 340 on the guide rod 310.

[0044] In other embodiments, the number of auxiliary rods 360 can be set to other values. For example, there can be two or three auxiliary rods 360 arranged parallel to each other and moving in the same way. Based on the auxiliary rods 360, to form the aforementioned parallelogram mechanism, the tray 400 can be directly connected to the swing rod 320 and the auxiliary rods 360, or indirectly connected to them. For example, in some embodiments, the linkage mechanism may include a crossbar (not shown) arranged parallel to the guide rod 310, with both the swing rod 320 and the auxiliary rod 360 hinged to the crossbar, and the crossbar fixedly connected to the tray 400 by fasteners. In this structure, the tray 400 is indirectly connected to the swing rod 320 and the auxiliary rod 360 via a crossbar. It is easy to understand that after the tray 400 is removed from the crossbar, the auxiliary rod 360, the swing rod 320, the guide rod 310 and the crossbar maintain a parallelogram mechanism. Therefore, it is more convenient to replace the tray 400 (for example, to replace the tray 400 of a different size according to the size of the test object), as only the connection between the tray 400 and the crossbar needs to be disassembled.

[0045] See Figure 3 In an embodiment where the tray 400 is directly connected to the swing rod 320 and the auxiliary rod 360, the tray 400 can be configured such that two protrusions 421 are provided on the bottom of the tray 400, and the two protrusions 421 are respectively hinged to the auxiliary rod 360 and the swing rod 320. The protrusions 421 are provided with hinge holes 422 whose center lines are parallel to the surface of the tray 400, and are hinged to the corresponding auxiliary rod 360 or swing rod 320 through pins (not shown in the figure) passing through the hinge holes 422. Figure 3 In the exemplary embodiment shown, the hinge holes 422 for connecting with the auxiliary rod 360 and the swing rod 320 are provided on different protrusions 421. In other embodiments, the tray 400 can be configured with the hinge holes 422 in other ways. For example, the tray 400 can be configured such that the bottom of the tray 400 is provided with an elongated rib, and the rib has two hinge holes 422 distributed along the length direction of the rib.

[0046] See Figure 2 In an embodiment where the tray 400 is indirectly connected to the swing rod 320 and the auxiliary rod 360 via a crossbar, the tray 400 can be configured such that a long, narrow groove 411 is provided at the bottom of the tray 400, and the crossbar is fitted into the groove 411. In this structure, the outer surface of the crossbar abuts against the bottom and wall of the groove 411, thereby preventing the tray 400 from wobbling on the crossbar through the assembly connection between the crossbar and the groove 411. The cross-section of the groove 411 can be rectangular, trapezoidal, or other shapes, as long as it increases the stable connection between the tray 400 and the crossbar. Figure 2As shown, in some embodiments, the bottom of the groove 411 can have a fixing hole 412 for fixed connection with the crossbar. After the crossbar is placed in the groove 411, the through hole on the crossbar for installing fasteners (such as screws, bolts, etc.) aligns with the fixing hole 412 on the tray 400, and the tray 400 and the crossbar are connected together by fasteners. It should be noted that the fixing hole 412 can be in various forms, such as a threaded hole or a smooth hole. When the fixing hole 412 is a threaded hole, the fastener is screwed into the fixing hole 412 to form a threaded connection. When the fixing hole 412 is a smooth hole, the fixing hole 412 penetrates the tray 400, and the fastener is screwed into the matching nut to clamp and fix the crossbar and the tray 400.

[0047] See Figure 1 In some embodiments, the support may include an extension rod 200, with both ends of the extension rod 200 detachably fixedly connected to the movable rod 120 and the guide rod 310, respectively. It should be understood that after removing the extension rod 200, the movable rod 120 and the guide rod 310 can be directly connected, and are also detachably fixedly connected. The extension rod 200 allows the support to have more usage forms to meet the needs of more different usage scenarios. For example, in some usage scenarios, the test object may need to be repositioned in an area close to the side wall connected to the fixed rod 110. In this case, the extension rod 200 can be omitted, and the movable rod 120 and the guide rod 310 can be directly connected. In other usage scenarios, the test object may need to be repositioned in an area far from the side wall connected to the fixed rod 110. In this case, an extension rod 200 of appropriate length can be selected, and the movable rod 120 and the guide rod 310 can be indirectly connected through the extension rod 200.

[0048] Based on the bracket provided by this utility model, this utility model also provides an acoustic testing system, which may include an anechoic chamber (not shown in the figure) and the bracket described in any of the above embodiments. The bracket is located inside the anechoic chamber and is used to support the test object. The structural form of the bracket can be referred to the previous description of the bracket, and will not be repeated here. Since the bracket disclosed in the above embodiments has the above-mentioned technical effects, the acoustic testing system with the bracket also has the above-mentioned technical effects, and will not be repeated here.

[0049] In some embodiments, the acoustic testing system may include a remote control receiver 500, located outside the anechoic chamber and electrically connected to the telescopic rod 100 of the support via a cable 600. The receiver 500 receives control signals that control the telescopic rod 100 to extend or retract. The cable 600 passes through the side wall of the anechoic chamber in a sealed manner, electrically connecting the telescopic rod 100 inside the chamber to the remote control receiver 500 outside. It should be understood that the telescopic rod 100 needs to be configured as electrically operated, and the operator sends control signals to the remote control receiver 500 via a remote control to control the telescopic rod 100 to extend or retract. Positioning the remote control receiver 500 outside the anechoic chamber not only makes receiving control signals more convenient but also avoids affecting the testing environment inside the chamber (if the remote control receiver 500 were placed inside the anechoic chamber, its larger size might reflect sound sources, thus affecting the testing environment).

[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. A bracket used inside a silencer box, characterized in that, include: The telescopic rod has a fixed rod and a movable rod that are slidably engaged, and one end of the fixed rod is provided with a fixing part for fixed connection with the side wall of the silencer box; The linkage mechanism includes a guide rod fixedly connected to the movable rod, a swing rod hinged to the guide rod, and a push rod braced between the guide rod and the swing rod. One end of the push rod is hinged to the swing rod, and the other end is hinged to a slider slidably disposed on the guide rod. The slider is provided with a locking member for locking the slider. A tray for holding the test object to be tested for acoustic testing, the bottom of the tray being connected to the swing rod.

2. The bracket according to claim 1, characterized in that, The fixed rod contains a motor for driving the movable rod.

3. The bracket according to claim 1, characterized in that, The fixing part is configured as a flange structure.

4. The bracket according to claim 1, characterized in that, The locking component is a hand-tightening screw, one end of which is provided with a hand-tightening operation part, and the other end is used to abut against the guide rod to lock the slider.

5. The stent according to any one of claims 1 to 4, characterized in that, The linkage mechanism includes at least one auxiliary rod arranged parallel to the swing rod, and the auxiliary rod, the swing rod, the guide rod and the tray form a parallelogram mechanism.

6. The bracket according to claim 5, characterized in that, The linkage mechanism includes a crossbar arranged parallel to the guide rod, the swing rod and the auxiliary rod are both hinged to the crossbar, and the crossbar is fixedly connected to the tray by fasteners.

7. The bracket according to claim 6, characterized in that, The bottom of the tray is provided with an elongated groove, and the crossbar is fitted into the groove.

8. The bracket according to claim 5, characterized in that, The bottom of the tray is provided with two protrusions, which are respectively hinged to the auxiliary rod and the swing rod.

9. An acoustic testing system, characterized in that, include: Silencer box; A support, located inside the anechoic chamber, is used to support the test object, and the support is the support as described in any one of claims 1 to 8.

10. The acoustic testing system according to claim 9, characterized in that, include: The remote control receiver, located outside the anechoic chamber, is electrically connected to the telescopic rod of the bracket via a cable, and is used to receive control signals that control the telescopic rod to extend or retract.

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