Multi-degree-of-freedom in-vehicle noise measuring device

Abstract

The utility model discloses a multi-degree-of-freedom in-vehicle noise measuring device, which comprises a base frame, a support frame and a mounting piece, and is characterized in that the base frame can be fixed in a vehicle, and the length and the width of the base frame can be adjusted; the number of the supporting frames is two, the two supporting frames are oppositely arranged at the two ends of the base frame, and the top end positions of the supporting frames are adjustable relative to the transverse position and the height position of the plane where the base frame is located. The number of the mounting pieces is two, and the two mounting pieces are universally hinged to the top end of the supporting frame and used for detachably fixing the noise measurement microphone. By adopting the multi-degree-of-freedom in-vehicle noise measuring device, the noise measuring microphone can be adjusted back and forth, up and down and left and right in the vehicle, so that the accuracy of real-time testing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile noise testing, in particular to a multi-degree-of-freedom in-vehicle noise measuring device. Background Art

[0002] With the development of the automotive industry, consumers' demands for ride comfort are increasing, and interior noise has become a key indicator for evaluating vehicle performance. To reduce interior noise, accurate identification and testing of noise sources are necessary. Currently, a variety of interior noise measurement methods and equipment are available on the market, but most suffer from fixed measurement positions and difficult adjustment, making them difficult to adapt to different vehicle models, different seat headrest structures, and varying measurement requirements.

[0003] Technical problems existing in existing technical solutions:

[0004] Fixed measurement position: Existing in-vehicle noise measurement equipment is often fixed in a certain position and cannot be flexibly adjusted according to actual needs, resulting in limited accuracy and comprehensiveness of the measurement results.

[0005] Inconvenient adjustment: Some adjustable measuring devices are complicated to operate during the adjustment process and require professionals or special tools to complete, which is not conducive to completing measurement tasks quickly and accurately.

[0006] Poor adaptability: The differences in headrest structures among different car models and seats make existing measuring equipment insufficient in terms of versatility and adaptability, making it difficult to meet diverse measurement needs. Utility Model Content

[0007] In view of the shortcomings of the existing technology, the technical problem to be solved by the utility model is to provide a multi-degree-of-freedom in-vehicle noise measurement device, in which the noise measurement microphone can be adjusted in the front, back, up, down, left and right directions in the vehicle, thereby improving the accuracy of real-time testing.

[0008] In order to achieve the above object, the present invention is implemented through the following technical solutions: a multi-degree-of-freedom vehicle interior noise measurement device, comprising:

[0009] A base frame, which can be fixed in the vehicle, and the length and width of the base frame can be adjusted;

[0010] There are two support frames, which are arranged at two ends of the base frame opposite to each other, and the top ends of the support frames are adjustable in lateral position and height relative to the plane where the base frame is located;

[0011] noise measurement microphone, and

[0012] There are two mounting parts, which are universally hinged on the top of the support frame and are used for detachably fixing the noise measurement microphone.

[0013] Furthermore, the base frame includes two connecting rod assemblies and two fixing rods, the length of the fixing rods is adjustable, the two fixing rods are arranged in parallel and spaced apart, and the two connecting rod assemblies are used to respectively connect the same-side ends of the two fixing rods.

[0014] Furthermore, the fixing rod includes a first sleeve rod, a first insertion rod and a first locking piece. The first sleeve rod and the first insertion rod can be slidably connected to each other. The first sleeve rod and the first insertion rod are both provided with a plurality of first through-holes spaced along their length directions. The first locking piece is a bolt assembly. The first locking piece locks and fixes the first sleeve rod and the first insertion rod by passing through the corresponding first through-holes on the first sleeve rod and the first insertion rod.

[0015] Furthermore, the connecting rod assembly includes a threaded rod and a first locking nut, one end of the threaded rod is socketed with one of the fixed rods, and an insertion hole is opened at the end of the other fixed rod, and the threaded rod can slide through the insertion hole. The first locking nut is socketed on the threaded rod, and the first locking nut can be rotated to tighten the fixed rod.

[0016] Furthermore, the support frame includes a support rod and a cantilever hinged to each other, and the end of the support rod away from the cantilever is hinged to the end of the fixing rod, and the mounting piece is universally hinged to the end of the cantilever.

[0017] Furthermore, the length of the cantilever is adjustable.

[0018] Furthermore, the cantilever includes a second sleeve rod, a second insertion rod and a second locking piece. The second sleeve rod and the second insertion rod are slidingly plugged into each other. The second sleeve rod and the second insertion rod are both provided with a plurality of second through holes spaced along their height direction. The second locking piece is a bolt assembly. The second locking piece locks and fixes the second sleeve rod and the second insertion rod by passing through the second through holes on the second sleeve rod and the second insertion rod.

[0019] Furthermore, the mounting member includes a first mounting rod, a second mounting rod and a sleeve, the first mounting rod is hinged to the support frame, the second mounting rod is sleeved with the end of the first mounting rod and can rotate around the first mounting rod, the sleeve is fixed to the end of the second mounting rod, and the noise measurement microphone is fixed on the sleeve.

[0020] Beneficial effects of the utility model:

[0021] When using the above-mentioned multi-degree-of-freedom in-vehicle noise measurement device, the base frame is first fixedly installed on the car seat headrest 1 or other positions in the front of the car body, and then the noise measurement microphone is installed on the mounting part. Then, according to the situation in the car and the external environment, the lateral position and height position of the top end of the support frame relative to the plane where the base frame is located are adjusted, and the angle is adjusted by rotating the mounting part at the same time until the noise measurement microphone is located at the target position.

[0022] With this device, the lateral and height adjustment of the top of the support frame relative to the plane of the base frame, as well as the adjustable angle of the mounting bracket, allow the noise measurement microphone to be positioned forward, backward, vertically, and horizontally within the vehicle according to noise conditions, thereby improving real-time testing accuracy. Furthermore, the entire device can be adjusted without the need for specialized tools, enhancing convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the specific embodiments. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0024] Figure 1 A schematic diagram of a multi-degree-of-freedom in-vehicle noise measurement device provided by one embodiment of the present utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of a base frame in a multi-degree-of-freedom vehicle interior noise measurement device is shown;

[0026] Figure 3 for Figure 1 A schematic diagram of a multi-degree-of-freedom in-vehicle noise measurement device in which a first set of rods and a first insertion rod are separated is shown;

[0027] Figure 4 for Figure 1 A schematic diagram of a support frame in a multi-degree-of-freedom in-vehicle noise measurement device is shown;

[0028] Figure 5 for Figure 4 A partial schematic diagram of

[0029] Figure 6 A schematic diagram of a multi-degree-of-freedom in-vehicle noise measurement device provided by one embodiment of the present utility model installed on a car seat headrest;

[0030] Reference numerals:

[0031] 1. Car seat headrest;

[0032] 100. Base frame; 110. Connecting rod assembly; 111. Threaded rod; 112. First locking nut; 120. Fixing rod; 121. First set of rods; 122. First insertion rod; 123. First locking member; 200. Support frame; 210. Support rod; 220. Cantilever; 221. Second set of rods; 222. Second insertion rod; 223. Second locking member; 300. Mounting member; 310. First mounting rod; 320. Second mounting rod; 330. Sleeve. DETAILED DESCRIPTION

[0033] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] See Figures 1 to 6 The multi-degree-of-freedom in-vehicle noise measurement device includes a base frame 100, a base frame 100, a support frame 200, a noise measurement microphone and a mounting member 300.

[0035] Specifically, the base frame 100 can be fixed inside the vehicle, and its length and width are adjustable. Two support frames 200 are provided, positioned opposite each other at the ends of the base frame 100. The top ends of the support frames 200 are adjustable in both horizontal and vertical positions relative to the plane of the base frame 100. Two mounting members 300 are universally hinged to the top ends of the support frames 200, and are used to removably secure the noise measurement microphone.

[0036] When in use, first fix the base frame 100 on the car seat headrest 1 or other positions in the front of the car body, and then install the noise measurement microphone on the mounting part 300. Then, according to the situation inside the car and the external environment, adjust the lateral position and height position of the top end of the support frame 200 relative to the plane where the base frame 100 is located, and at the same time rotate the mounting part 300 to adjust the angle until the noise measurement microphone is at the target position.

[0037] During use, the device features adjustable lateral and height positions of the top of the support frame 200 relative to the plane of the base frame 100, and an adjustable angle of the mounting member 300. This allows the noise measurement microphone to be positioned forward, backward, vertically, and horizontally within the vehicle, depending on the noise level. This improves the accuracy of real-time testing. Furthermore, the entire device can be adjusted without the need for specialized tools, enhancing convenience.

[0038] In this embodiment, the base frame 100 includes two connecting rod assemblies 110 and two fixing rods 120. The length of the fixing rods 120 is adjustable, and the two fixing rods 120 are arranged in parallel and spaced apart. The two connecting rod assemblies 110 are used to connect the same side ends of the two fixing rods 120 respectively.

[0039] Specifically, the fixing rod 120 includes a first sleeve rod 121, a first insertion rod 122, and a first locking member 123. The first sleeve rod 121 and the first insertion rod 122 are slidably engageable with each other. A plurality of first through-holes are defined in each of the first sleeve rod 121 and the first insertion rod 122 at intervals along their lengths. The first locking member 123 is a bolt assembly that passes through corresponding first through-holes in the first sleeve rod 121 and the first insertion rod 122 to securely lock the first sleeve rod 121 and the first insertion rod 122.

[0040] Connecting rod assembly 110 includes a threaded rod 111 and a first locking nut 112. One end of threaded rod 111 is slotted into one of the fixed rods 120. The other fixed rod 120 has a socket at its end. Threaded rod 111 can slide through the socket. First locking nut 112 is slotted onto threaded rod 111. Rotating first locking nut 112 tightens fixed rod 120.

[0041] By using this base frame 100, the entire device can be fixed on the car seat headrest 1 frame. The specific operation method is as follows:

[0042] 1) First, adjust the length of the fixing rod 120 according to the length of the car seat headrest 1 frame. The specific adjustment method is:

[0043] Adjust the insertion depth of the first set rod 121 and the first insertion rod 122, then pass the screw of the bolt assembly through the first through-holes corresponding to the first set rod 121 and the first insertion rod 122, and then tighten the bolt assembly.

[0044] 2) Connect the two fixed rods through two connecting rod assemblies 110. The specific operation is as follows:

[0045] One end of the threaded rod 111 is sleeved onto the end of one of the fixing rods 120, and the other end of the threaded rod 111 is passed through the socket on the other fixing rod 120. Then, the first locking nut 112 is sleeved onto the end of the threaded rod 111, and the length and width of the empty space in the middle of the base frame 100 formed by the connecting rod assembly 110 and the two fixing rods 120 are made larger than the length and width of the car seat headrest frame 1;

[0046] 3) The entire device is fixed on the car seat headrest 1 frame, specifically

[0047] The base frame 100 consisting of the connecting rod assembly 110 and the two fixing rods 120 is mounted on the car seat headrest 1 frame. Then, the first locking nut 112 is rotated to drive the two fixing rods 120 to move closer to the middle until the two fixing rods 120 are clamped on the front and rear sides of the car seat headrest 1 frame, and the installation of the base frame 100 is completed.

[0048] In this embodiment, the support frame 200 includes a support rod 210 and a cantilever 220 that are hinged to each other, and the end of the support rod 210 away from the cantilever 220 is hinged to the end of the fixing rod 120, and the mounting member 300 is universally hinged to the end of the cantilever 220.

[0049] During use, the height position and front-to-back position of the cantilever 220 relative to the plane of the base frame 100 can be adjusted through the support rod 210 or the cantilever 220 .

[0050] As another preferred embodiment, the length of the cantilever 220 is adjustable. By adjusting the length of the cantilever 220, the flexibility of adjusting the position of the noise measurement microphone can be further improved.

[0051] Specifically, cantilever 220 includes a second sleeve rod 221, a second insertion rod 222, and a second locking member 223. The second sleeve rod 221 and the second insertion rod 222 are slidably engaged with each other. A plurality of second through-holes are defined on each of the second sleeve rod 221 and the second insertion rod 222, spaced along their height. The second locking member 223 is a bolt assembly. The second locking member 223 passes through the second through-holes in the second sleeve rod 221 and the second insertion rod 222, thereby locking and securing the second sleeve rod 221 and the second insertion rod 222.

[0052] When the length of the cantilever 220 needs to be adjusted, the second locking member 223 is first removed, and then the insertion depth of the second sleeve rod 221 and the second insertion rod 222 is adjusted, and then the second sleeve rod 221 and the second insertion rod 222 are fastened again using the bolt assembly. The specific method is the same as the length adjustment method of the fixed rod 120.

[0053] It should be noted that, in specific implementation, the first locking member 123 and the second locking member 223 may be in other forms, such as a latch. In addition, when a through hole is provided on the upper portion of the sleeve rod and the insertion rod, the locking member may be a locking screw.

[0054] In this embodiment, the mounting member 300 includes a first mounting rod 310, a second mounting rod 320, and a sleeve 330. The first mounting rod 310 is hingedly connected to the support frame 200, the second mounting rod 320 is sleeved with the end of the first mounting rod 310 and can rotate around the first mounting rod 310, and the sleeve 330 is fixed to the end of the second mounting rod 320. The noise measurement microphone is fixed to the sleeve 330.

[0055] When in use, the noise measuring microphone can be placed in the sleeve 330. In addition, when the first mounting rod 310 and the second mounting rod 320 are rotated around their hinge axes, the angle of the noise measuring microphone can be adjusted.

[0056] The above-mentioned multi-degree-of-freedom in-vehicle noise measurement device has the following advantages:

[0057] First: It can improve measurement accuracy and reliability: 1) Through multi-degree-of-freedom adjustment, the measurement position of the microphone can be accurately located to ensure the accuracy of the measurement data; 2) The bolt and nut fixing method is used to eliminate shaking during the measurement process, improve the stability of data acquisition, and enhance adaptability and versatility.

[0058] Second: It can enhance adaptability and versatility: 1) The structural design of the fixing rod 120 is suitable for seat headrests of different sizes and shapes and can be used in various types of vehicles; 2) The telescopic adjustment function of the bracket rod meets the needs of different measuring distances.

[0059] Third: It can optimize operational convenience: 1) Installation and adjustment can be completed without professional tools, lowering the usage threshold; 2) The quick nut locking structure is adopted to shorten the debugging time and improve work efficiency; the modular design facilitates disassembly and transportation, reducing storage space.

[0060] Fourth: It can reduce the cost of use: 1) The structure is simple and the parts are highly standardized, which makes maintenance and replacement easy; 2) It has strong versatility. One set of equipment can be used in various testing scenarios, improving the return on investment.

[0061] Fifth: It can improve test flexibility: 1) It can achieve 360° up and down and 180° left and right angle adjustment; 2) It can quickly adjust the measurement position and angle according to specific test requirements.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A multi-degree-of-freedom vehicle interior noise measurement device, characterized in that: include: A base frame, which can be fixed in the vehicle, and the length and width of the base frame can be adjusted; There are two support frames, which are arranged at two ends of the base frame opposite to each other, and the top ends of the support frames are adjustable in lateral position and height relative to the plane where the base frame is located; noise measurement microphone, and There are two mounting parts, which are universally hinged on the top of the support frame and are used for detachably fixing the noise measurement microphone.

2. The multi-degree-of-freedom vehicle interior noise measurement device according to claim 1, characterized in that: The base frame includes two connecting rod assemblies and two fixing rods. The length of the fixing rods is adjustable. The two fixing rods are arranged in parallel and spaced apart. The two connecting rod assemblies are used to respectively connect the same-side ends of the two fixing rods.

3. The multi-degree-of-freedom vehicle interior noise measurement device according to claim 2, characterized in that: The fixing rod includes a first sleeve rod, a first insertion rod and a first locking piece. The first sleeve rod and the first insertion rod can be slidably connected to each other. The first sleeve rod and the first insertion rod are both provided with a plurality of first through-holes spaced along their length directions. The first locking piece is a bolt assembly. The first locking piece locks and fixes the first sleeve rod and the first insertion rod by passing through the corresponding first through-holes on the first sleeve rod and the first insertion rod.

4. The multi-degree-of-freedom vehicle interior noise measurement device according to claim 2 or 3, characterized in that: The connecting rod assembly includes a threaded rod and a first locking nut. One end of the threaded rod is socketed with one of the fixed rods, and an insertion hole is provided at the end of the other fixed rod. The threaded rod can slide through the insertion hole. The first locking nut is socketed on the threaded rod. Rotating the first locking nut can tighten the fixed rod.

5. The multi-degree-of-freedom vehicle interior noise measurement device according to claim 2, characterized in that: The support frame includes a support rod and a cantilever hinged to each other, and the end of the support rod away from the cantilever is hinged to the end of the fixing rod, and the mounting piece is universally hinged to the end of the cantilever.

6. The multi-degree-of-freedom vehicle interior noise measurement device according to claim 5, characterized in that: The length of the cantilever is adjustable.

7. The multi-degree-of-freedom vehicle interior noise measurement device according to claim 6, characterized in that: The cantilever includes a second sleeve rod, a second insertion rod and a second locking piece. The second sleeve rod and the second insertion rod are slidably connected to each other. The second sleeve rod and the second insertion rod are both provided with a plurality of second through holes spaced along their height direction. The second locking piece is a bolt assembly. The second locking piece locks and fixes the second sleeve rod and the second insertion rod by passing through the second through holes on the second sleeve rod and the second insertion rod.

8. The multi-degree-of-freedom vehicle interior noise measurement device according to claim 1 or 5, characterized in that: The mounting member includes a first mounting rod, a second mounting rod and a sleeve. The first mounting rod is hinged to the support frame. The second mounting rod is sleeved to the end of the first mounting rod and can rotate around the first mounting rod. The sleeve is fixed to the end of the second mounting rod. The noise measurement microphone is fixed on the sleeve.

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