Car speaker and bracket matching method

Abstract

The present invention discloses a method for matching a car speaker and its bracket, comprising the steps of: S1, avoiding the excitation direction of the speaker from the sensitive direction of the vehicle body mounting point; S2, matching the bracket to the vehicle body. The method reduces vibration caused by the speaker during operation by frequency-avoiding matching of the speaker, bracket, and vehicle body mounting points.

Description

Technical Field

[0001] The invention belongs to the field of automobile horn frequency matching, and in particular relates to an automobile horn and bracket matching method based on vibration and frequency avoidance design. Background Art

[0002] Vibration caused by the operation of a car's horn, including vibrations in the vehicle body, pedals, and steering wheel, is a common NVH issue and a key factor in evaluating vehicle comfort. Typically, the main causes of vibration are: 1. The mounting bracket fails to effectively isolate the horn's excitation; 2. The excitation frequency is not effectively shielded from sensitive areas of the vehicle body. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for matching a car speaker and a bracket, the purpose of which is to reduce the vibration caused by the operation of the speaker.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for matching a car speaker and a bracket, comprising the steps of:

[0005] S1. Avoid the excitation direction of the speaker and the sensitive direction of the vehicle body installation point;

[0006] S2. Match the bracket and the vehicle body.

[0007] The step S1 comprises:

[0008] S101, confirming the excitation direction of the speaker;

[0009] S102: Setting the force transmission direction of the bracket.

[0010] In step S101, the excitation direction of the speaker is the normal direction of the largest cross section of the speaker basin.

[0011] In step S102 , the force transmission direction between the bracket and the vehicle body mounting point and the excitation direction of the speaker are avoided.

[0012] In step S102 , the angle between the force transmission direction of the bracket and the vehicle body mounting point and the excitation direction of the speaker is 90 degrees.

[0013] The step S2 comprises:

[0014] S201, identifying an excitation frequency curve of a system where the speaker and the bracket are located when the speaker is working, and setting the curve as a first curve;

[0015] S202, identifying a vehicle body mounting point origin dynamic stiffness curve and setting it as a second curve;

[0016] S203, matching the first curve with the second curve;

[0017] S204. Selection of vehicle body mounting points.

[0018] In step S203 , the frequency corresponding to the peak value of the first curve must not correspond to the frequency of the valley value of the second curve.

[0019] In step S203, the frequency bandwidth is set according to the half power bandwidth interval.

[0020] In step S202 , the speaker and the bracket need to be removed during testing.

[0021] The automobile horn and bracket matching method of the present invention reduces vibration caused by the operation of the horn by performing frequency-avoiding matching on the horn-bracket-car body mounting points. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a basic structural diagram of the speaker;

[0023] Figure 2 This is a schematic diagram of the main excitation direction of the speaker and the main direction of the bracket and vehicle body installation points;

[0024] Figure 3 It is a schematic diagram of the system excitation curve;

[0025] Figure 4 is a schematic diagram of the dynamic stiffness curve;

[0026] Figure 5 It is a schematic diagram of the direction of excitation transmitted from the installation point;

[0027] The marks in the above figure are: 1. Speaker; 2. Bracket; 3. Body mounting point; 4. First measuring point; 5. First curve; 6. Second measuring point; 7. Second curve; 8. Speaker excitation direction; 9. Force transmission direction between bracket and body mounting point; 10. Along the direction of greater stiffness; 11. Along the direction of less stiffness; 12. Along the direction of less stiffness; 13. The valley value corresponding to the dynamic stiffness curve. DETAILED DESCRIPTION

[0028] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower" and similar expressions used in this article are for illustrative purposes only.

[0030] It should be noted that, in the following embodiments, the "first" and "second" do not represent an absolute distinction in structure and / or function, nor do they represent a sequence of execution, but are merely for the convenience of description.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which the present invention pertains. The terminology used herein in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] like Figure 1 As shown, the present invention provides a method for matching a car speaker and a bracket, comprising the following steps:

[0033] S1. Avoid the excitation direction of the speaker and the sensitive direction of the vehicle body installation point;

[0034] S2. Match the bracket and the vehicle body.

[0035] Specifically, a car horn and bracket matching method based on vibration and frequency avoidance design is proposed: frequency avoidance matching is performed on the horn-bracket-car body installation points.

[0036] 1. Bracket - speaker: By designing the direction of the bracket's force transmission, the main excitation of the speaker (vibration in the direction of the speaker basin) and the sensitive direction of the installation point are avoided;

[0037] 2. (Speaker + bracket) - Vehicle body mounting point, identify the main excitation frequency of the (Speaker + bracket), identify the sensitive frequency of the vehicle body mounting point, and then perform frequency avoidance matching between the two.

[0038] like Figure 1 As shown, the car horn is installed on a bracket, and the bracket is installed on the car body.

[0039] The above step S1 includes:

[0040] S101, confirming the excitation direction of the speaker;

[0041] S102: Setting the force transmission direction of the bracket.

[0042] In the above step S101 , the excitation direction of the speaker is generally the normal direction of the largest cross section of the speaker cone, which can also be determined through testing.

[0043] like Figure 2 As shown, in step S102, the force transmission direction between the bracket and the vehicle body mounting point is deflected from the excitation direction of the horn. Furthermore, preferably, the angle between the force transmission direction between the bracket and the vehicle body mounting point and the excitation direction of the horn is 90 degrees. At this point, the excitation transmitted from the horn to the mounting point is minimized. The vehicle body mounting point is the connection point between the bracket and the vehicle body.

[0044] The above step S2 includes:

[0045] S201, identifying an excitation frequency curve of a system where the speaker and the bracket are located when the speaker is working, and setting the curve as a first curve;

[0046] S202, identifying a vehicle body installation point dynamic stiffness curve and setting it as a second curve;

[0047] S203, matching the first curve with the second curve;

[0048] S204. Selection of vehicle body mounting points.

[0049] In the above step S202 , the speaker and the bracket need to be removed during testing, that is, the bracket is not installed on the vehicle body.

[0050] like Figure 4 As shown, in the above step S203, when matching, the frequency corresponding to the peak of the first curve must not correspond to the valley frequency of the second curve. The frequency bandwidth is set according to the half power bandwidth interval.

[0051] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A method for matching a car speaker and a bracket, characterized in that: Including steps: S1. Avoid the excitation direction of the speaker and the sensitive direction of the vehicle body installation point; S2. Matching installation of bracket and vehicle body; Wherein, the step S1 includes: S101, confirming the excitation direction of the speaker; S102, setting the force transmission direction between the bracket and the vehicle body mounting point; In the step S102, the force transmission direction between the bracket and the vehicle body mounting point is avoided from the excitation direction of the speaker; The step S2 comprises: S201, identifying an excitation frequency curve of a system where the speaker and the bracket are located when the speaker is working, and setting the curve as a first curve; S202, testing the vehicle body mounting point origin dynamic stiffness curve, setting it as the second curve; S203, matching the first curve with the second curve; S204, selection of vehicle body mounting points; In step S202 , the speaker and bracket need to be removed during testing, that is, the bracket is not installed on the vehicle body; In step S203 , the frequency corresponding to the peak value of the first curve must not correspond to the frequency of the valley value of the second curve.

2. The method for matching a car speaker and a bracket according to claim 1, wherein: In step S101, the excitation direction of the speaker is the normal direction of the largest cross section of the speaker basin.

3. The method for matching a car speaker and a bracket according to claim 1, wherein: In step S102 , the angle between the force transmission direction of the bracket and the vehicle body mounting point and the excitation direction of the speaker is 90 degrees.

4. The method for matching a car speaker and a bracket according to claim 1, wherein: In step S203, the frequency bandwidth is set according to the half power bandwidth interval.

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