Truck sound insulation performance testing device

Abstract

The utility model relates to the technical field of automobiles, in particular to a truck sound insulation performance testing device. The truck sound insulation performance testing device comprises an excitation sound source, a first sound transmission assembly, a second sound transmission assembly and a third sound transmission assembly. The excitation sound source is arranged in front of a seat in a cab of the truck; the first sound transmission assemblies are arranged on the outer side of the cab at intervals. The second sound transmission components are arranged on the outer side part of a power assembly of the truck at intervals; the third sound transmission assemblies are arranged on the side portion of the exhaust port of the truck at intervals. According to the truck sound insulation performance testing device, the influence of various main noise sources on a driver in a cab is fully considered, a first sound transmission assembly, a second sound transmission assembly and a third sound transmission assembly are configured around main transmission paths from the noise sources to the position of the driver, and the truck sound insulation performance testing device is suitable for sound insulation index evaluation of different truck cabs; the method is high in applicability in the field of trucks, does not change along with a test site, and facilitates transverse comparison of data measured by different trucks.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a truck sound insulation performance testing device. Background Art

[0002] When the vehicle is driving, the driver may be exposed to various noises in the cab, which may affect the driver's driving comfort. Therefore, in the process of vehicle development, how to reasonably and effectively test and evaluate the vehicle's sound insulation performance has become a key link in ensuring the driver's comfort.

[0003] At present, most of the sound insulation test schemes are aimed at passenger cars, but there is no direct reference scheme in the field of sound insulation evaluation of commercial vehicles such as trucks. Utility Model Content

[0004] The purpose of the present application is to provide a truck sound insulation performance testing device, so as to solve the technical problem that most of the sound insulation test schemes in the prior art are aimed at passenger cars, but there is no direct reference scheme in the field of sound insulation evaluation of commercial vehicles such as trucks.

[0005] The present application provides a truck sound insulation performance test device for testing the sound insulation performance of a truck, the truck sound insulation performance test device comprising an excitation sound source, a first sound transmission component, a second sound transmission component and a third sound transmission component;

[0006] The excitation sound source is arranged in front of a seat in the cab of the truck;

[0007] The first sound transmission components are arranged at intervals on the outer side of the cab;

[0008] The second sound transmission assembly is disposed at intervals on the outer side of the powertrain of the truck;

[0009] The third sound transmission assembly is spaced apart and arranged on the side of the exhaust port of the truck.

[0010] In the above technical solution, further, the first sound microphone assembly includes a first microphone, a second microphone and a third microphone;

[0011] The first microphones are disposed at a first predetermined interval on the side of the door of the cab along the width direction of the truck;

[0012] The second microphone is arranged in front of the front panel of the cab at the first predetermined interval;

[0013] The third microphone is arranged behind the rear panel of the cab at the first predetermined interval;

[0014] The first predetermined interval is 99.5-100.5 cm.

[0015] In any of the above technical solutions, further, the first microphone, the second microphone and the third microphone are all higher than the upper surface of the floor mat of the cab by a second predetermined interval;

[0016] The second predetermined interval is 76.5-77.5 cm.

[0017] In any of the above technical solutions, further, the first sound transmission component includes a fourth microphone;

[0018] The fourth microphone is disposed at a side of the air inlet of the cab along the width direction of the truck, and the fourth microphone is spaced a third predetermined distance from the air inlet;

[0019] The third predetermined interval is 19.5-20.5 cm.

[0020] In any of the above technical solutions, further, the first microphone assembly includes a fifth microphone, the fifth microphone is arranged above the ceiling of the cab, and the fifth microphone is higher than the ceiling by a fourth predetermined interval;

[0021] The fourth predetermined interval is 44.5-45.5 cm.

[0022] In any of the above technical solutions, further, the fifth microphone is arranged behind the rear edge of the skylight of the cab at a fifth predetermined interval;

[0023] The fifth predetermined interval is 9.5-10.5 cm.

[0024] In any of the above technical solutions, further, the second sound transmitting assembly includes a plurality of sixth microphones, the plurality of sixth microphones are arranged on both sides of the engine of the powertrain along the width direction of the truck, and the sixth microphone is spaced a sixth predetermined interval from the engine;

[0025] The sixth predetermined interval is 4.5-5.5 cm.

[0026] In any of the above technical solutions, further, the third sound transmission component is arranged at the rear side of the exhaust port, and the line connecting the third sound transmission component and the exhaust port is arranged at a predetermined angle with the axis of the exhaust port, and the predetermined angle is 40-50°.

[0027] In any of the above technical solutions, further, the length of the line connecting the third sound transmission component and the exhaust port is a predetermined length;

[0028] The predetermined length is 49.5-50.5 cm.

[0029] In any of the above technical solutions, further, along the width direction of the truck, the excitation sound source is separated from the center line of the seat by a sixth predetermined interval, and the sixth predetermined interval is 18-22 cm;

[0030] The excitation sound source is higher than the rear edge of the seat of the chair by a seventh predetermined interval, and the seventh predetermined interval is 65-75 cm.

[0031] Compared with the prior art, the beneficial effects of this application are:

[0032] The truck sound insulation performance testing device provided in the present application fully considers the impact of various major noise sources on the driver in the cab, and configures the first sound transmission component, the second sound transmission component and the third sound transmission component around the main transmission path from these noise sources to the driver's position. It is suitable for evaluating the sound insulation of different truck cabs, has strong applicability in the truck field, and does not change with the test site, so it is convenient for horizontal comparison of the measured data of different trucks. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of a first use state of the truck sound insulation performance testing device provided by an embodiment of the present application in a cab;

[0035] Figure 2 A schematic diagram of a second use state of the truck sound insulation performance testing device provided in an embodiment of the present application in the cab ( Figure 1 (top view);

[0036] Figure 3 A schematic diagram of the truck sound insulation performance testing device provided in an embodiment of the present application in use at a powertrain;

[0037] Figure 4 A schematic diagram of the truck sound insulation performance testing device provided in an embodiment of the present application in use at the exhaust port;

[0038] Figure 5 A schematic diagram of a first use state of the truck sound insulation performance testing device provided by an embodiment of the present application at a seat;

[0039] Figure 6A schematic diagram of a second use state of the truck sound insulation performance testing device provided in an embodiment of the present application at a seat ( Figure 5 front view of the ).

[0040] Reference numerals:

[0041] 100-cab; 1001-front panel; 1003-rear panel; 1004-ceiling; 1005-rear edge of skylight; 1006-upper surface of floor mat; 1007-seat; 1007a-seat; 1007b-seat back; 101-powertrain; 1010-engine; 1011-transmission; 103-exhaust port; 104-frame; 105-air inlet; 20-first microphone; 21-second microphone; 22-third microphone; 23-fourth microphone; 24-fifth microphone; 30-sixth microphone; 40-seventh microphone; 50-excitation sound source. DETAILED DESCRIPTION

[0042] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] See also Figures 1 to 6 As shown, an embodiment of the present application provides a truck sound insulation performance testing device for testing the sound insulation performance of a truck.

[0046] In an optional solution of this embodiment, the truck sound insulation performance testing device includes an excitation sound source 50, a first sound transmission component, a second sound transmission component and a third sound transmission component.

[0047] Among them, the excitation sound source 50 can be, for example, a volume sound source, and the excitation sound source 50 is arranged in front of the seat 1007 in the cab 100 of the truck, so that the position of the excitation sound source 50 corresponds to the response point of the driver's ear, and noise is generated during the test through the excitation sound source 50.

[0048] The first sound transmission components are arranged at intervals on the outer side of the cab 100 , so that the positions of the first sound transmission components correspond to the noise positions around the cab 100 , and are used to measure the sound pressure value of the noise generated by the excitation sound source 50 transmitted to the surrounding of the cab 100 .

[0049] The second sound transmission assembly is spaced apart at the outer side of the powertrain 101 of the truck, so that the position of the second sound transmission assembly corresponds to the noise position of the powertrain 101 , and is used to measure the sound pressure value of the noise generated by the excitation sound source 50 transmitted to the powertrain 101 .

[0050] like Figure 4 As shown, an exhaust port 103 is provided on one side of a frame 104 of the truck, and a third sound transmission component is spaced apart and arranged on the side of the exhaust port 103 of the truck, so that the position of the third sound transmission component corresponds to the exhaust noise position of the exhaust port 103, and is used to measure the sound pressure value of the noise generated by the excitation sound source 50 transmitted to the exhaust port 103.

[0051] Specifically, the truck sound insulation performance testing device uses the acoustic reciprocity theorem and the structural characteristics of the truck itself, sets the excitation sound source 50 at the driver's ear position, and sets the first sound transmission component, the second sound transmission component and the third sound transmission component at the main actual noise excitation source position of the truck, so that the sound insulation of the truck cab 100 can be determined based on the data measured by the first sound transmission component, the second sound transmission component and the third sound transmission component in combination with the commonly used sound transmission function.

[0052] It can be seen that the truck sound insulation performance testing device fully considers the influence of various major noise sources on the driver in the cab 100, and configures the first sound transmission component, the second sound transmission component and the third sound transmission component around the main transmission path from these noise sources to the driver's position. It is suitable for evaluating the sound insulation of different truck cabs 100, has strong applicability in the truck field, and does not change with the test site, so it is convenient to make a horizontal comparison of the measured data of different trucks.

[0053] In an optional solution of this embodiment, the first microphone assembly includes a first microphone 20 , a second microphone 21 and a third microphone 22 .

[0054] The first microphone 20 is disposed at the side of the door of the cab 100 along the width direction of the truck at a first predetermined interval L1, that is, the first microphone 20 is disposed at the noise position at the door of the truck. According to the acoustic reciprocity theorem, the data measured by the first microphone 20 can reflect the response of the noise at the door at the driver's ear.

[0055] The second microphone 21 is disposed in front of the dash panel 1001 of the cab 100 at a first predetermined interval L1, that is, the second microphone 21 is disposed at the noise position in front of the cab 100. According to the acoustic reciprocity theorem, the data measured by the second microphone 21 can reflect the response of the noise in front of the cab 100 at the driver's ear.

[0056] The third microphone 22 is disposed at the rear of the rear panel 1003 of the cab 100 at a first predetermined interval L1, that is, the third microphone 22 is disposed at the noise position at the rear side of the cab 100. According to the acoustic reciprocity theorem, the data measured by the third microphone 22 can reflect the response of the noise at the rear side of the cab 100 at the driver's ear.

[0057] The first predetermined interval L1 is 99.5-100.5 cm, for example, 99.5 cm, 100 cm or 100.5 cm.

[0058] In this embodiment, in order to more accurately reflect the noise around the cab 100 , the first microphone 20 , the second microphone 21 and the third microphone 22 are all higher than the upper surface 1006 of the floor mat of the cab 100 by a second predetermined interval L2 .

[0059] The second predetermined interval L2 is 76.5-77.5 cm, for example, 76.5 cm, 77 cm or 77.5 cm.

[0060] In an optional solution of this embodiment, the first sound microphone assembly further includes a fourth microphone 23 .

[0061] The air inlet 105 is located at one side of the side portion of the cab 100 along the width direction of the truck. In other words, the air inlet 105 is located at the left or right side of the cab 100. As an example, Figure 2 As shown, the air intake 105 is located on the left side of the cab 100 .

[0062] The fourth microphone 23 is disposed at the side of the air inlet 105 along the width direction of the truck, and the fourth microphone 23 is separated from the air inlet 105 by a third predetermined interval L3, so that the fourth microphone 23 is directly opposite to the air inlet 105 along the width direction of the truck, and the fourth microphone 23 is separated from the air inlet 105 by a third predetermined interval L3, so that the fourth microphone 23 is disposed at the intake noise position. According to the acoustic reciprocity theorem, the data measured by the fourth microphone 23 can reflect the response of the intake noise at the driver's ear.

[0063] The third predetermined interval L3 is 19.5-20.5 cm, for example, 19 cm, 20 cm or 20.5 cm.

[0064] In an optional solution of this embodiment, the first microphone assembly includes a fifth microphone 24, and the fifth microphone 24 is disposed above the ceiling 1004 of the cab 100, and the fifth microphone 24 is higher than the fourth predetermined interval L4 of the ceiling 1004. In other words, the fifth microphone 24 is disposed at the noise position of the ceiling 1004. According to the acoustic reciprocity theorem, the data measured by the fifth microphone 24 can reflect the response of the noise at the ceiling 1004 at the driver's ear.

[0065] The fourth predetermined interval L4 is 44.5-45.5 cm, for example, 44.5 cm, 45 cm or 45.5 cm.

[0066] In this embodiment, in order to enable the fifth microphone 24 to more accurately reflect the influence of the skylight on the noise at the ceiling 1004, the fifth microphone 24 is disposed behind the skylight rear edge 1005 of the cab 100 at a fifth predetermined interval L5.

[0067] The fifth predetermined interval L5 is 9.5-10.5 cm, for example, 9.5 cm, 10 cm or 10.5 cm.

[0068] In an optional solution of this embodiment, the second sound transmission assembly includes a plurality of sixth microphones 30, and the plurality of sixth microphones 30 are arranged on both sides of the engine 1010 of the power assembly 101 along the width direction of the truck, and the sixth microphone 30 is separated from the outer surface of the engine 1010 by a sixth predetermined interval L6. That is, the plurality of sixth microphones 30 are arranged at the noise position of the engine 1010, and according to the acoustic reciprocity theorem, the data measured by the plurality of sixth microphones 30 are integrated to reflect the response of the noise of the engine 1010 at the driver's ears.

[0069] The sixth predetermined interval L6 is 4.5-5.5 cm, for example, 4.5 cm, 5 cm or 5.5 cm.

[0070] It is worth emphasizing that the powertrain 101 includes an engine 1010 and a gearbox 1011 , and the sixth microphone 30 is only arranged at the engine 1010 but not at the gearbox 1011 , which is suitable for the sound insulation performance test of the truck.

[0071] Alternatively, if Figure 3 The sixth microphone 30 is arranged on one side of the engine 1010 in the width direction of the truck, and accordingly, the sixth microphone 30 is also arranged on the other side of the engine 1010 in the width direction of the truck. That is, the sixth microphone 30 can be arranged on the four corners of both sides of the engine 1010.

[0072] In an optional solution of this embodiment, the third sound transmission component is arranged at the rear side of the exhaust port 103, and the line connecting the third sound transmission component and the exhaust port 103 is arranged at a predetermined angle c with the axis of the exhaust port 103. The third sound transmission component includes a seventh microphone 40, so that the seventh microphone 40 is arranged at the exhaust noise position, and according to the acoustic reciprocity theorem, the data measured by the seventh microphone 40 can reflect the response of the exhaust noise at the driver's ear.

[0073] The predetermined angle c is 40-50°, for example, 40°, 45° or 50°.

[0074] The length of the line connecting the third sound transmission component and the exhaust port 103 is a predetermined length L0, which is 49.5-50.5 cm. That is, the seventh microphone 40 is separated from the exhaust port 103 by a predetermined length L0 along the above-mentioned line, which is 49.5-50.5 cm, for example, 49.5 cm, 50 cm or 50.5 cm.

[0075] In an optional solution of this embodiment, along the width direction of the truck, the excitation sound source 50 is separated from the center line of the seat 1007 by a sixth predetermined interval L6, and the sixth predetermined interval L6 is 18-22 cm, for example, 18 cm, 20 cm or 22 cm.

[0076] Optionally, the excitation sound source 50 is located on the left or right side of the center line of the seat 1007. As a specific example, Figure 5 A situation in which the excitation sound source 50 is located to the right of the center line of the seat 1007 is shown.

[0077] The excitation sound source 50 is higher than the rear edge of the seat 1007a of the chair 1007 by a seventh predetermined interval L7, and the seventh predetermined interval L7 is 65-75 cm, for example, 65 cm, 70 cm or 75 cm.

[0078] It can be understood that the excitation sound source 50 is located in front of the seat back 1007 b of the seat 1007 .

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them; although the utility model is described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein by equivalent; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the utility model. In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments instead of other features, the combination of features of different embodiments means that they are within the scope of the utility model and form different embodiments. For example, any one of the embodiments claimed for protection can be used in any combination. The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the utility model, and should not be regarded as an admission or in any form of implication that the information constitutes prior art known to those skilled in the art.

Claims

1. A truck sound insulation performance testing device, used for testing the sound insulation performance of a truck, characterized in that: The truck sound insulation performance testing device comprises an excitation sound source, a first sound transmission component, a second sound transmission component and a third sound transmission component; The excitation sound source is arranged in front of a seat in the cab of the truck; The first sound transmission components are arranged at intervals on the outer side of the cab; The second sound transmission assembly is disposed at intervals on the outer side of the powertrain of the truck; The third sound transmission assembly is spaced apart and arranged on the side of the exhaust port of the truck.

2. The truck sound insulation performance testing device according to claim 1, characterized in that: The first sound transmission assembly includes a first microphone, a second microphone and a third microphone; The first microphones are disposed at a first predetermined interval on the side of the door of the cab along the width direction of the truck; The second microphone is arranged in front of the front panel of the cab at the first predetermined interval; The third microphone is arranged behind the rear panel of the cab at the first predetermined interval; The first predetermined interval is 99.5-100.5 cm.

3. The truck sound insulation performance testing device according to claim 2, characterized in that: The first microphone, the second microphone and the third microphone are all above the upper surface of the floor mat of the cab by a second predetermined interval; The second predetermined interval is 76.5-77.5 cm.

4. The truck sound insulation performance testing device according to claim 1, characterized in that: The first sound transmission component includes a fourth microphone; The fourth microphone is disposed at a side of the air inlet of the cab along the width direction of the truck, and the fourth microphone is spaced a third predetermined distance from the air inlet; The third predetermined interval is 19.5-20.5 cm.

5. The truck sound insulation performance testing device according to claim 1, characterized in that: The first sound-transmitting assembly includes a fifth microphone, the fifth microphone is disposed above the ceiling of the cab, and the fifth microphone is higher than the ceiling by a fourth predetermined interval; The fourth predetermined interval is 44.5-45.5 cm.

6. The truck sound insulation performance testing device according to claim 5, characterized in that: The fifth microphone is arranged behind the rear edge of the skylight of the cab at a fifth predetermined interval; The fifth predetermined interval is 9.5-10.5 cm.

7. The truck sound insulation performance testing device according to claim 1, characterized in that: The second sound transmitting assembly includes a plurality of sixth microphones, the plurality of sixth microphones are arranged on both sides of the engine of the powertrain along the width direction of the truck, and the sixth microphones are spaced apart from the engine by a sixth predetermined interval; The sixth predetermined interval is 4.5-5.5 cm.

8. The truck sound insulation performance testing device according to claim 1, characterized in that: The third sound transmission component is arranged at the rear side of the exhaust port, and a line connecting the third sound transmission component and the exhaust port is arranged at a predetermined angle with the axis of the exhaust port, and the predetermined angle is 40-50°.

9. The truck sound insulation performance testing device according to claim 8, characterized in that: The length of the line connecting the third sound transmission component and the exhaust port is a predetermined length; The predetermined length is 49.5-50.5 cm.

10. The truck sound insulation performance testing device according to claim 1, characterized in that: Along the width direction of the truck, the excitation sound source is spaced apart from the center line of the seat by a sixth predetermined interval, and the sixth predetermined interval is 18-22 cm; The excitation sound source is higher than the rear edge of the seat of the chair by a seventh predetermined interval, and the seventh predetermined interval is 65-75 cm.

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