Road noise roar improvement system and method

Abstract

According to the road noise roar improvement system and method, in the vehicle running process, the back door mode is detected in real time, the back door mode is compared with a set value, and when the back door mode is larger than the set value, a back door mode formation changing module is controlled to act to change the back door mode formation, and roars in a vehicle are reduced. According to the method, the vibration mode of the back door is detected, when the mode of the back door is larger than the set value, the mode formation of the back door is changed by driving the back door mode formation changing module to generate repulsive force, the purpose of reducing roar sound is achieved, and the method has the advantages of being simple, convenient to implement and low in cost.

Description

Technical Field

[0001] The invention belongs to the technical field of automobiles, and in particular relates to a road noise improvement system and method. Background Art

[0002] The road noise of cars has always been an unavoidable topic in NVH (Noise, Vibration, Harshness). Due to the low frequency of the road noise, the means of improvement are relatively limited. At present, the way to improve the road noise is to improve the body structure, but the method of improving the body structure is relatively costly. After all, to change the frequency at such a low frequency, it is necessary to make large-scale changes to the body structure, and the cost of improvement is very high. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide a road noise improvement system and method.

[0004] The technical solution adopted by the present invention is: a road noise improvement system, comprising

[0005] The back door vibration detection module is used to detect the back door vibration acceleration in real time during vehicle driving;

[0006] A control module, used for comparing the vibration acceleration of the back door with a first set acceleration, and sending a control signal to the back door mode formation changing module when the vibration acceleration of the back door is greater than the first set acceleration;

[0007] The tailgate modal formation changing module is used to execute actions based on control signals to change the tailgate modal formation and reduce the roar in the vehicle.

[0008] Further, after the tailgate modal formation changing module is actuated, if the control module determines that the tailgate vibration acceleration is less than or equal to a second set acceleration, the control signal is stopped from being sent, and the second set acceleration is less than or equal to the first set acceleration.

[0009] Furthermore, the rear door vibration detection module is installed at the middle sheet metal of the rear door.

[0010] Furthermore, the tailgate modal formation changing module includes a switch module, a plurality of first electromagnets installed around the tailgate, and a plurality of second electromagnets installed on the tailgate frame. The plurality of first electromagnets are arranged corresponding to the plurality of second electromagnets, and the magnetic poles of each group of electromagnets are arranged relatively to each other. The first electromagnets and the second electromagnets are connected to the vehicle body power supply through the switch module.

[0011] Furthermore, when the vibration acceleration of the tailgate is greater than the first set acceleration, the control module controls the control switch in the switch module to close, so that the first electromagnet and the second electromagnet are energized to generate magnetic poles, and a repulsive force is generated between the relatively arranged first electromagnet and the second electromagnet to change the modal formation of the tailgate.

[0012] Furthermore, the first electromagnet and the second electromagnet are fixed to the rear door and the rear door frame respectively by gluing.

[0013] A method for improving road noise roaring sound, during vehicle driving, real-time detection of the vibration acceleration of a rear door, comparison of the vibration acceleration of the rear door with a first set acceleration, when the vibration acceleration of the rear door is greater than the first set acceleration, control of a rear door modal formation changing module to change the modal formation of the rear door, thereby reducing the roaring sound inside the vehicle.

[0014] Further, after the tailgate modal formation changing module is actuated, if it is detected that the tailgate vibration acceleration is less than or equal to a second set acceleration, the tailgate modal formation changing module is controlled to return to an original position, and the second set acceleration is less than or equal to the first set acceleration.

[0015] Furthermore, the vibration acceleration of the back door is detected by a back door vibration detection module installed at the middle sheet metal of the back door.

[0016] Furthermore, the tailgate modal formation changing module includes a switch module, a plurality of first electromagnets installed around the tailgate, and a plurality of second electromagnets installed on the tailgate frame. The plurality of first electromagnets are arranged corresponding to the plurality of second electromagnets, and the magnetic poles of each group of electromagnets are arranged relatively to each other. The first electromagnets and the second electromagnets are connected to the vehicle body power supply through the switch module.

[0017] Furthermore, when the vibration acceleration of the tailgate is greater than a first set acceleration, the control switch in the switch module is controlled to close, so that the first electromagnet and the second electromagnet are energized to generate magnetic poles, and a repulsive force is generated between the relatively arranged first electromagnet and the second electromagnet to change the modal formation of the tailgate.

[0018] Furthermore, the first electromagnet and the second electromagnet are respectively fixed to the back door and the back door frame by gluing.

[0019] The beneficial effects of the present invention are:

[0020] The present invention detects the vibration mode of the tailgate, and when the tailgate mode is greater than a first set value, drives the tailgate mode formation changing module to generate a repulsive force to change the tailgate mode formation, thereby achieving the purpose of reducing the roaring sound. The method has the advantages of being simple, easy to implement and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the booming sound improvement system of the present invention.

[0022] Figure 2 The figure is a schematic diagram of the arrangement of the electromagnets on the back door of the present invention.

[0023] Figure 3 The figure is a schematic diagram of the arrangement of the electromagnets on the back door frame of the present invention.

[0024] Figure 4 This is a schematic diagram of the tailgate modal formation before it changes during vehicle driving.

[0025] Figure 5 The figure is a flow chart of the method for improving the booming sound of the present invention. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1-4 As shown, the present invention provides a road noise improvement system comprising

[0028] The back door vibration detection module is used to detect the back door vibration acceleration in real time during vehicle driving;

[0029] A control module, used for comparing the vibration acceleration of the back door with a first set acceleration, and sending a control signal to the back door mode formation changing module when the vibration acceleration of the back door is greater than the first set acceleration;

[0030] The tailgate modal formation changing module is used to execute actions based on control signals to change the tailgate modal formation and reduce the roar in the vehicle.

[0031] The present invention analyzes the reasons why a vehicle generates a roaring sound based on the principle of the roaring sound, and proposes a system for improving the roaring sound by changing the modal formation of a rear door (trunk door). The system has a simple structure and is easy to implement.

[0032] In the above scheme, after the tailgate modal formation changing module is activated, if the control module determines that the tailgate vibration acceleration is less than or equal to the second set acceleration, the control signal is stopped, and the second set acceleration is less than or equal to the first set acceleration, and preferably the second set acceleration is less than the first set acceleration, so as to avoid the tailgate modal formation changing module from continuously activating. Both the first set acceleration and the second set acceleration are calibrated values.

[0033] In the above solution, the rear door vibration detection module is installed on the middle sheet metal of the rear door close to the rear door window and is located on the inner side of the rear door. The rear door vibration detection module is a vibration acceleration sensor.

[0034] In the above scheme, the tailgate modal formation changing module includes a switch module, a plurality of first electromagnets installed around the tailgate, and a plurality of second electromagnets installed on the tailgate frame. The plurality of first electromagnets are arranged correspondingly to the plurality of second electromagnets, and the magnetic poles of each group of electromagnets are arranged relatively (i.e., N poles correspond to N poles, and S poles correspond to S poles). The first electromagnet and the second electromagnet are connected to the vehicle body power supply through the switch module. When the tailgate vibration acceleration is greater than the first set acceleration, the control module controls the control switch in the switch module to close, so that the first electromagnet and the second electromagnet are energized to generate magnetic poles, and repulsion is generated between the first electromagnet and the second electromagnet arranged relatively, and the tailgate is pushed outward by the repulsion, changing the modal formation of the tailgate. When the control module stops sending the control signal, the control switch is disconnected, the first electromagnet and the second electromagnet lose power, the magnetic poles disappear, and the first electromagnet and the second electromagnet are only in contact without generating a force. The first electromagnet and the second electromagnet can be fixed to the tailgate and the tailgate frame by gluing or other means.

[0035] Based on the above-mentioned road noise and roar improvement system, the present invention also provides a road noise and roar improvement method, such as Figure 5 As shown, during the driving process of the vehicle, the vibration acceleration of the back door is detected in real time, and the vibration acceleration of the back door is compared with the first set acceleration. When the vibration acceleration of the back door is greater than the first set acceleration, the back door modal formation change module is controlled to change the modal formation of the back door to reduce the roar in the car. After the back door modal formation change module is activated, if it is detected that the vibration acceleration of the back door is less than or equal to the second set acceleration, the back door modal formation change module is controlled to return to the original position (that is, the back door modal formation change module does not generate a force on the back door), and the second set acceleration is less than or equal to the first set acceleration.

[0036] The present invention detects the vibration state of the tailgate and drives the magnet blocks on the tailgate and the tailgate frame to generate repulsive force to change the modal formation of the tailgate. The tailgate formation is weakened because the mode is excited, and the formation of the tailgate compressing the sound cavity in the vehicle becomes smaller accordingly, reducing the pressure on the sound cavity in the vehicle, and at the same time reducing the pressure on the ears of the passengers in the vehicle, thereby reducing the roaring sound in the vehicle.

[0037] In the above solution, the vibration acceleration of the back door is detected by a back door vibration detection module installed at the sheet metal in the middle of the back door, and the back door vibration detection module is a vibration acceleration sensor.

[0038] In the above scheme, the tailgate modal formation changing module includes a switch module, a plurality of first electromagnets installed around the tailgate, and a plurality of second electromagnets installed on the tailgate frame. The plurality of first electromagnets are arranged correspondingly to the plurality of second electromagnets, and the magnetic poles of each group of electromagnets are arranged relatively (i.e., N poles correspond to N poles, and S poles correspond to S poles). The first electromagnet and the second electromagnet are connected to the vehicle body power supply through the switch module. When the tailgate vibration acceleration is greater than the first set acceleration, the control module controls the control switch in the switch module to close, so that the first electromagnet and the second electromagnet are energized to generate magnetic poles, and repulsion is generated between the first electromagnet and the second electromagnet arranged relatively, and the tailgate is pushed outward by the repulsion, changing the modal formation of the tailgate. When the control module stops sending the control signal, the control switch is disconnected, the first electromagnet and the second electromagnet lose power, the magnetic poles disappear, and the first electromagnet and the second electromagnet are only in contact without generating a force. The first electromagnet and the second electromagnet can be fixed to the tailgate and the tailgate frame by gluing or other means.

[0039] Those skilled in the art may also understand that the various illustrative logical blocks, units, and steps listed in the embodiments of the present invention may be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly demonstrate the interchangeability of hardware and software, the various illustrative components, units, and steps described above have generally described their functions. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the described functions for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present invention.

[0040] The various illustrative logic blocks or units described in the embodiments of the present invention can be implemented or operated by a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field programmable gate array or other programmable logic device, a discrete gate or transistor logic, a discrete hardware component, or any combination of the above. The general-purpose processor can be a microprocessor, and optionally, the general-purpose processor can also be any conventional processor, controller, microcontroller or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration.

[0041] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field.

Claims

1. A road noise improvement system, Features: include The back door vibration detection module is used to detect the back door vibration acceleration in real time during vehicle driving; A control module, used for comparing the vibration acceleration of the back door with a first set acceleration, and sending a control signal to the back door mode formation changing module when the vibration acceleration of the back door is greater than the first set acceleration; The tailgate modal formation changing module is used to execute actions based on control signals to change the tailgate modal formation and reduce the roar in the vehicle.

2. The road noise improvement system according to claim 1, Features: After the tailgate mode formation changing module is actuated, if the control module determines that the tailgate vibration acceleration is less than or equal to the second set acceleration, the control signal is stopped from being sent, and the second set acceleration is less than or equal to the first set acceleration.

3. The road noise improvement system according to claim 1, Features: The back door vibration detection module is installed at the middle sheet metal of the back door.

4. The road noise improvement system according to claim 1, Features: The tailgate modal formation changing module includes a switch module, a plurality of first electromagnets installed around the tailgate, and a plurality of second electromagnets installed on the tailgate frame. The plurality of first electromagnets are arranged corresponding to the plurality of second electromagnets, and the magnetic poles of each group of electromagnets are arranged relatively. The first electromagnets and the second electromagnets are connected to the vehicle body power supply through the switch module.

5. The road noise improvement system according to claim 4, Features: When the vibration acceleration of the tailgate is greater than the first set acceleration, the control module controls the control switch in the switch module to close, so that the first electromagnet and the second electromagnet are energized to generate magnetic poles, and a repulsive force is generated between the relatively arranged first electromagnet and the second electromagnet to change the modal formation of the tailgate.

6. A method for improving road noise. Features: During vehicle driving, the vibration acceleration of the tailgate is detected in real time, and the vibration acceleration of the tailgate is compared with a first set acceleration. When the vibration acceleration of the tailgate is greater than the first set acceleration, the tailgate modal formation changing module is controlled to change the modal formation of the tailgate to reduce the roar in the vehicle.

7. The method for improving road noise according to claim 6, Features: After the tailgate modal formation changing module is actuated, if it is detected that the tailgate vibration acceleration is less than or equal to a second set acceleration, the tailgate modal formation changing module is controlled to return to the original position, and the second set acceleration is less than or equal to the first set acceleration.

8. The method for improving road noise according to claim 6, Features: The tailgate vibration acceleration is detected by the tailgate vibration detection module installed on the middle sheet metal of the tailgate.

9. The method for improving road noise according to claim 6, Features: The tailgate modal formation changing module includes a switch module, a plurality of first electromagnets installed around the tailgate, and a plurality of second electromagnets installed on the tailgate frame. The plurality of first electromagnets are arranged corresponding to the plurality of second electromagnets, and the magnetic poles of each group of electromagnets are arranged relatively. The first electromagnets and the second electromagnets are connected to the vehicle body power supply through the switch module.

10. The method for improving road noise according to claim 9, Features: When the vibration acceleration of the tailgate is greater than the first set acceleration, the control switch in the switch module is controlled to close, so that the first electromagnet and the second electromagnet are energized to generate magnetic poles, and a repulsive force is generated between the relatively arranged first electromagnet and the second electromagnet to change the modal formation of the tailgate.

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