In-vehicle engine noise and transmission shaft noise fusion active noise reduction method and device, terminal and storage medium

Abstract

The invention discloses an in-vehicle engine noise and transmission shaft noise fusion active noise reduction method and device, a terminal and a storage medium, an MCU obtains current state information of a vehicle and sends the current state information to an ANC controller, and whether an active noise reduction program is started or not is judged; the ANC controller judges the noise reduction working condition according to the vehicle power signal; and entering a corresponding active noise reduction mode, executing an active noise reduction algorithm, generating a counteracting sound wave signal for noise reduction, and sending the counteracting sound wave signal through a bass loudspeaker in the vehicle. On the basis of the engine active noise reduction technology, the same working principle is applied, noise caused by the transmission shaft is reduced, the automobile active noise reduction technology is applied to the problems of engine noise and transmission shaft noise at the same time, and for an automobile with the engine active noise reduction function, the cost of a single automobile is not additionally increased; the method can be realized only by adding an input signal of an active noise reduction program, and market complaints and repair rates of products can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of active noise reduction in vehicles, and specifically relates to a method, device, terminal and storage medium for active noise reduction by integrating engine noise and transmission shaft noise in a vehicle. Background Art

[0002] Automotive active noise reduction technology is one of the technologies that has developed rapidly in recent years. With the development of sensor technology, digital signal processing technology and control technology, the performance of automotive active noise reduction systems has been continuously improved. The active noise reduction system can collect and analyze data in real time according to the noise situation in the car, reduce noise by adjusting the sound system or using other noise reduction methods, and provide a more comfortable riding environment.

[0003] At present, active noise reduction in cars is no longer limited to high-end luxury models. More and more mid- and low-end models are also beginning to adopt active noise reduction technology. With the continuous expansion of the active noise reduction market for cars, more and more companies are beginning to enter this field. At present, many companies at home and abroad have begun to produce active noise reduction systems for cars, and the market competition is becoming increasingly fierce. Some well-known brands such as Bose and Cellon have occupied a certain share in the market, but there are also many domestic brands that are gradually emerging. Relevant regulations and standards are also constantly being improved to ensure that their performance and safety meet the requirements.

[0004] The noise caused by the drive shaft is due to the excitation generated by the drive shaft rotating at different speeds, which is usually 1st-order frequency noise. When the 1st-order noise frequency of the drive shaft speed is close to the rear axle mode, it will cause vibration and noise of the rear axle. The traditional solution is to add a mass block to the rear axle as a shock absorber to reduce vibration and noise.

[0005] The engine noise problem is mainly caused by its main order frequency noise. For example, the main order noise of a four-cylinder engine is the second order, and the main order noise of a six-cylinder engine is the third order. Drive shaft noise may occur in front-engine, rear-wheel drive passenger cars due to the dynamic balance problem of the drive shaft, causing noise in the rear seat of the car. It is a market problem and usually occurs when the vehicle speed is higher than 110km / h. The first-order excitation of the high-speed rotation of the drive shaft will cause vibration of the rear axle mode, thereby causing noise in the rear seat of the car. In the research and development stage, a passive noise reduction solution can be adopted to add rear axle shock absorbers to prevent the problem from entering the market. If this problem is exposed after the market launch, the noise problem can be solved by reserving an active noise reduction solution in the early stage, thereby reducing market complaints and return repair rates.

[0006] The existing technology only tracks the engine speed to reduce the noise of the main order frequency of the engine, but has no effect on the first order frequency noise of the transmission shaft speed. Summary of the invention

[0007] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a method, device, terminal and storage medium for active noise reduction by integrating engine noise and drive shaft noise in a vehicle. The present invention is based on the engine active noise reduction technology, applies the same working principle, and is extended to reduce the noise caused by the drive shaft. The automobile active noise reduction technology is applied to the problems of engine noise and drive shaft noise at the same time. For vehicles that already have the engine active noise reduction function, there is no additional increase in the cost of the single vehicle, and it can be achieved by simply increasing the input signal of the active noise reduction program, which can reduce the market complaints and return rate of the product.

[0008] The objective of the present invention is achieved through the following technical solutions:

[0009] As a first aspect of the present invention, a method for actively reducing noise by fusing engine noise and transmission shaft noise in a vehicle is provided, comprising the following steps:

[0010] S1.MCU obtains the current status information of the vehicle and sends it to the ANC controller to determine whether to turn on the active noise reduction program;

[0011] S2. The ANC controller determines the noise reduction condition based on the vehicle power signal;

[0012] S3. Enter the corresponding active noise reduction mode according to the noise reduction working condition judgment result of step S2, execute the active noise reduction algorithm, generate a noise reduction canceling sound wave signal and send it out through the subwoofer in the car.

[0013] Furthermore, the step S1 comprises:

[0014] S11. The ANC controller is powered on, and the MCU obtains the vehicle door status, window status, engine speed, transmission shaft speed, gear position, and vehicle speed signals from the vehicle CAN bus and sends them to the ANC controller;

[0015] S12.ANC determines whether the conditions for starting the active noise reduction program are met based on the vehicle's door and window status.

[0016] Furthermore, in step S12, when the doors and windows are all closed and the engine is started, it is determined that the vehicle has met the conditions for turning on active noise reduction and enters the active noise reduction control mode.

[0017] Furthermore, in step S2, the noise reduction condition is determined according to the vehicle speed.

[0018] Furthermore, in step S2,

[0019] When the vehicle speed is less than 120km / h, the vehicle is in the engine active noise reduction working condition and the engine active noise reduction mode is activated;

[0020] When the vehicle speed is ≥120km / h, the vehicle is in the drive shaft active noise reduction condition and the drive shaft active noise reduction mode is started.

[0021] Furthermore, the step S3 comprises:

[0022] S31. Signal input: The ANC controller obtains the vehicle engine speed, transmission shaft speed, gear position, and vehicle speed signals from the MCU, and obtains the in-vehicle noise signal through the in-vehicle noise reduction microphone;

[0023] S32. Identify the sound frequency that needs noise reduction;

[0024] S33. Use the notch algorithm to iteratively calculate the input signal to obtain the output signal.

[0025] As a first aspect of the present invention, a device for actively reducing the noise of an in-vehicle engine noise and a transmission shaft noise is provided, which is used to implement the method for actively reducing the noise of an in-vehicle engine noise and a transmission shaft noise according to any one of claims 1 to 6, and is characterized by comprising:

[0026] MCU, used to obtain vehicle status information through vehicle CAN signals, wherein the vehicle status information includes door and window status and vehicle power information;

[0027] In-car noise reduction microphone, used to obtain in-car noise signals;

[0028] The ANC controller obtains vehicle status information through the MCU and obtains the vehicle's interior noise signal through the vehicle's interior noise reduction microphone, comprehensively determines the vehicle's noise reduction conditions, and executes the corresponding active noise reduction program.

[0029] As a second aspect of the present invention, a terminal is provided, including:

[0030] one or more processors;

[0031] a memory for storing the one or more processor-executable instructions;

[0032] Wherein, the one or more processors are configured to:

[0033] The active noise reduction method for fusing engine noise and transmission shaft noise in a vehicle as described in the present invention is implemented.

[0034] As a fourth aspect of the present invention, a non-temporary computer-readable storage medium is provided. When the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the active noise reduction method for fusing in-vehicle engine noise and drive shaft noise as described in the present invention.

[0035] The present invention has the following advantages:

[0036] A method for reducing automobile drive shaft noise is proposed, which uses the principle of active noise reduction of the engine as a backup solution to solve market complaints and reduce after-sales maintenance.

[0037] The specific implementation process of the active noise reduction method of the drive shaft is proposed, and it is integrated with the active noise reduction of the engine and reflected in the vehicle at the same time.

[0038] A control strategy is proposed. According to the actual noise characteristics of the vehicle, under typical working conditions with high drive shaft noise, the program part of the drive shaft active noise reduction is turned on. Under other working conditions, the engine active noise reduction function is kept on and the drive shaft active noise reduction is not turned on, while taking into account both program computing power and stability.

[0039] In summary, the present invention is based on the engine active noise reduction technology, applies the same working principle, and is extended to reduce the noise caused by the transmission shaft. On the basis of not increasing the material cost, it solves the potential problem and can reduce the market complaint rate. The existing technical solutions do not use active noise reduction technology to solve the transmission shaft noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 This is a flow chart of an active noise reduction method for integrating engine noise and transmission shaft noise in a vehicle according to Embodiment 1 of the present invention;

[0042] Figure 2 Schematic diagram of the principle of the notch algorithm used in Example 1 of the present invention;

[0043] Figure 3 This is a schematic diagram of a terminal structure described in Example 3 of the present invention. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] Example 1

[0047] like Figure 1 As shown, a method for actively reducing the noise by integrating the engine noise and the transmission shaft noise in a vehicle comprises the following steps:

[0048] S1. The ANC (active noise reduction) controller is powered on, and the MCU obtains the vehicle's current status information from the vehicle's CAN bus and sends it to the ANC controller to determine whether to start the active noise reduction program:

[0049] S11. The ANC controller is powered on, and the MCU obtains vehicle door status, window status, engine speed, transmission shaft speed, gear position, vehicle speed and other status signals from the vehicle CAN bus and sends them to the ANC controller;

[0050] S12. ANC determines whether the conditions for starting the active noise reduction program are met based on the vehicle door and window status:

[0051] When the doors and windows are all closed and the engine is started, the vehicle is judged to have met the conditions for turning on active noise reduction and enters active noise reduction control mode.

[0052] S2. The ANC controller determines the noise reduction condition based on the vehicle power signal:

[0053] According to the noise characteristics of the target vehicle, the noise caused by the drive shaft is usually a relatively fixed working condition. Usually when the vehicle speed exceeds 120km / h, the speed of the drive shaft is faster, which may cause noise inside the vehicle. Therefore, the target frequency of the active noise reduction program is switched based on the vehicle speed.

[0054] When the vehicle speed is less than 120km / h, the vehicle is in the engine active noise reduction working condition and the engine active noise reduction mode is activated;

[0055] When the vehicle speed is ≥120km / h, the vehicle is in the drive shaft active noise reduction condition and the drive shaft active noise reduction mode is started.

[0056] S3. Enter the corresponding active noise reduction mode according to the noise reduction working condition judgment result of step S2, execute the active noise reduction algorithm, generate a noise reduction cancellation sound wave signal and send it out through the subwoofer in the car, realize sound wave cancellation in the noise reduction microphone area, and reduce the noise of the corresponding frequency.

[0057] S31. Signal input: The ANC controller obtains the vehicle engine speed, transmission shaft speed, gear position, vehicle speed and other power signals from the MCU, and obtains the in-vehicle noise signal through the in-vehicle noise reduction microphone;

[0058] S32. Identify the sound frequency that needs to be reduced; for example, if the engine is a four-cylinder engine, the main noise order corresponding to the engine is 2nd order, and the transmission shaft noise frequency is usually 1st order;

[0059] S33. Use the notch algorithm to convert the input signal into Figure 1 As shown, perform iterative operations to obtain the output signal:

[0060] ① Input X(n) at time n:

[0061] X(n)=[x(n),x(n-1),…,x(n-N+1)] T

[0062] ②Filter weight coefficient W(n) at time n:

[0063] W(n)=[w0[n],w1(n),…,w N-1 (n)] T

[0064] ③Filter output y(n) at time n:

[0065]

[0066] ④Error signal e(n):

[0067] e(n)=d(n)-y(n)=d(n)-W T (n)X(n)

[0068] ⑤ Mean square error ε:

[0069] ε=E[e 2 (n)] = E[(d(n)-y(n)) 2 ]=E[(d(n)-W T (n)X(n)) 2 ]

[0070] ⑥Weight coefficient update formula:

[0071] W(n+1)=W(n)+2μe(n)X(n)

[0072] Example 2

[0073] An active noise reduction device for integrating engine noise and transmission shaft noise in a vehicle, which is used to implement the method described in Example 1, comprises:

[0074] MCU, used to obtain vehicle status information through vehicle CAN signals, wherein the vehicle status information includes door and window status and vehicle power information;

[0075] In-car noise reduction microphone, used to obtain in-car noise signals;

[0076] The ANC controller obtains vehicle status information through the MCU and obtains the vehicle's interior noise signal through the vehicle's interior noise reduction microphone, comprehensively determines the vehicle's noise reduction conditions, and executes the corresponding active noise reduction program.

[0077] Furthermore, the vehicle power information includes engine speed, transmission shaft speed, gear position, and vehicle speed.

[0078] Furthermore, the ANC controller determines the vehicle noise reduction working condition according to the vehicle speed.

[0079] Furthermore, the vehicle noise reduction working condition includes an engine active noise reduction working condition and a transmission shaft active noise reduction working condition.

[0080] Example 3

[0081] Figure 3 3 is a block diagram of a terminal provided in Example 3 of the present application, and the terminal may be the terminal in the above embodiment. The terminal may be a portable mobile terminal, such as a smart phone or a tablet computer. The terminal may also be referred to as a user device, a portable terminal, or other names.

[0082] Typically, the terminal includes: a processor 301 and a memory 302 .

[0083] The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 301 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 301 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 301 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0084] The memory 302 may include one or more computer-readable storage media, which may be tangible and non-transitory. The memory 302 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 302 is used to store at least one instruction, which is used to be executed by the processor 301 to implement a vehicle active noise reduction fusion control method provided in the present application.

[0085] In some embodiments, the terminal may further include: a peripheral device interface 303 and at least one peripheral device. Specifically, the peripheral device includes: at least one of a radio frequency circuit 304 , a touch display screen 305 , a camera 306 , an audio circuit 307 , a positioning component 308 and a power supply 309 .

[0086] The peripheral device interface 303 may be used to connect at least one peripheral device related to I / O (Input / Output) to the processor 301 and the memory 302. In some embodiments, the processor 301, the memory 302, and the peripheral device interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 301, the memory 302, and the peripheral device interface 303 may be implemented on a separate chip or circuit board, which is not limited in this embodiment.

[0087] The radio frequency circuit 304 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 304 communicates with the communication network and other communication devices through electromagnetic signals. The radio frequency circuit 304 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 304 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, and the like. The radio frequency circuit 304 can communicate with other terminals through at least one wireless communication protocol. The wireless communication protocol includes but is not limited to: the World Wide Web, a metropolitan area network, an intranet, various generations of mobile communication networks (2G, 3G, 4G and 5G), a wireless local area network and / or a WiFi (Wireless Fidelity) network. In some embodiments, the radio frequency circuit 304 may also include circuits related to NFC (Near Field Communication), which is not limited in this application.

[0088] The touch display screen 305 is used to display the UI (User Interface). The UI may include graphics, text, icons, videos and any combination thereof. The touch display screen 305 also has the ability to collect touch signals on the surface or above the surface of the touch display screen 305. The touch signal can be input to the processor 301 as a control signal for processing. The touch display screen 305 is used to provide virtual buttons and / or virtual keyboards, also known as soft buttons and / or soft keyboards. In some embodiments, the touch display screen 305 can be one, and the front panel of the terminal is set; in other embodiments, the touch display screen 305 can be at least two, which are respectively set on different surfaces of the terminal or are folded; in some other embodiments, the touch display screen 305 can be a flexible display screen, which is set on the curved surface or folded surface of the terminal. Even, the touch display screen 305 can also be set to a non-rectangular irregular shape, that is, a special-shaped screen. The touch display screen 305 can be made of materials such as LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode, organic light-emitting diode).

[0089] The camera assembly 306 is used to capture images or videos. Optionally, the camera assembly 306 includes a front camera and a rear camera. Typically, the front camera is used to realize video calls or selfies, and the rear camera is used to realize the shooting of photos or videos. In some embodiments, there are at least two rear cameras, which are any one of a main camera, a depth of field camera, and a wide-angle camera, so as to realize the fusion of the main camera and the depth of field camera to realize the background blur function, and the fusion of the main camera and the wide-angle camera to realize panoramic shooting and VR (Virtual Reality) shooting functions. In some embodiments, the camera assembly 306 may also include a flash. The flash can be a monochrome temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm light flash and a cold light flash, which can be used for light compensation at different color temperatures.

[0090] The audio circuit 307 is used to provide an audio interface between the user and the terminal. The audio circuit 307 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, and convert the sound waves into electrical signals and input them into the processor 301 for processing, or input them into the radio frequency circuit 304 to achieve voice communication. For the purpose of stereo acquisition or noise reduction, there may be multiple microphones, which are respectively arranged at different parts of the terminal. The microphone may also be an array microphone or an omnidirectional acquisition microphone. The speaker is used to convert the electrical signal from the processor 301 or the radio frequency circuit 304 into sound waves. The speaker may be a traditional film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can not only convert the electrical signal into sound waves audible to humans, but also convert the electrical signal into sound waves inaudible to humans for purposes such as ranging. In some embodiments, the audio circuit 307 may also include a headphone jack.

[0091] The positioning component 308 is used to locate the current geographical location of the terminal to implement navigation or LBS (Location Based Service). The positioning component 308 can be a positioning component based on the US GPS (Global Positioning System), China's Beidou system or Russia's Galileo system.

[0092] The power supply 309 is used to power various components in the terminal. The power supply 309 can be an alternating current, a direct current, a disposable battery, or a rechargeable battery. When the power supply 309 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery charged through a wired line, and a wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0093] The terminal is used to execute the active noise reduction method for fusing engine noise and transmission shaft noise in a vehicle as described in Example 1.

[0094] Those skilled in the art will understand that Figure 3 The structure shown in the figure does not constitute a limitation on the terminal, and may include more or less components than those shown in the figure, or combine certain components, or adopt a different component arrangement.

[0095] Example 4

[0096] In an exemplary embodiment, a computer-readable storage medium is also provided, on which a computer program is stored. When the program is executed by a processor, an active noise reduction method for integrating engine noise and drive shaft noise in a vehicle is implemented as provided in all the inventive embodiments of the present application.

[0097] Any combination of one or more computer-readable media may be used. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device, or device.

[0098] Computer-readable signal media may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0099] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0100] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0101] Example 5

[0102] In an exemplary embodiment, an application product is also provided, including one or more instructions, which can be executed by the processor 301 of the above-mentioned device to complete the above-mentioned active noise reduction method for fusing engine noise and transmission shaft noise in a vehicle.

[0103] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and implementation mode. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A method for actively reducing the noise of a vehicle by integrating the noise of an engine and a transmission shaft, characterized in that: The following steps are involved: S1.MCU obtains the current status information of the vehicle and sends it to the ANC controller to determine whether to turn on the active noise reduction program; S2. The ANC controller determines the noise reduction condition based on the vehicle power signal; S3. Enter the corresponding active noise reduction mode according to the noise reduction working condition judgment result of step S2, execute the active noise reduction algorithm, generate a noise reduction canceling sound wave signal and send it out through the subwoofer in the car.

2. The method for active noise reduction by integrating engine noise and transmission shaft noise in a vehicle as claimed in claim 1, characterized in that: The step S1 comprises: S11. The ANC controller is powered on, and the MCU obtains the vehicle door status, window status, engine speed, transmission shaft speed, gear position, and vehicle speed signals from the vehicle CAN bus and sends them to the ANC controller; S12.ANC determines whether the conditions for starting the active noise reduction program are met based on the vehicle's door and window status.

3. The method for active noise reduction by integrating engine noise and transmission shaft noise in a vehicle as claimed in claim 2, characterized in that: In step S12, when the doors and windows are all closed and the engine is started, it is determined that the vehicle has met the conditions for turning on active noise reduction and enters the active noise reduction control mode.

4. The method for active noise reduction by fusing engine noise and transmission shaft noise in a vehicle as claimed in claim 1, characterized in that: In step S2, the noise reduction working condition is determined according to the vehicle speed.

5. The method for active noise reduction by integrating engine noise and transmission shaft noise in a vehicle as claimed in claim 4, characterized in that: In the step S2, When the vehicle speed is less than 120km / h, the vehicle is in the engine active noise reduction working condition and the engine active noise reduction mode is activated; When the vehicle speed is ≥120km / h, the vehicle is in the drive shaft active noise reduction condition and the drive shaft active noise reduction mode is started.

6. The method for active noise reduction by fusing engine noise and transmission shaft noise in a vehicle as claimed in claim 1, characterized in that: The step S3 comprises: S31. Signal input: The ANC controller obtains the vehicle engine speed, transmission shaft speed, gear position, and vehicle speed signals from the MCU, and obtains the in-vehicle noise signal through the in-vehicle noise reduction microphone; S32. Identify the sound frequency that needs noise reduction; S33. Use the notch algorithm to iteratively calculate the input signal to obtain the output signal.

7. An active noise reduction device for integrating engine noise and transmission shaft noise in a vehicle, which is used to implement the active noise reduction method for integrating engine noise and transmission shaft noise in a vehicle as claimed in any one of claims 1 to 6, characterized in that: include: MCU, used to obtain vehicle status information through vehicle CAN signals, wherein the vehicle status information includes door and window status and vehicle power information; In-car noise reduction microphone, used to obtain in-car noise signals; The ANC controller obtains vehicle status information through the MCU and obtains the vehicle's interior noise signal through the vehicle's interior noise reduction microphone, comprehensively determines the vehicle's noise reduction conditions, and executes the corresponding active noise reduction program.

8. A terminal, characterized in that: include: one or more processors; a memory for storing the one or more processor-executable instructions; Wherein, the one or more processors are configured to: Execute the active noise reduction method for integrating in-vehicle engine noise and transmission shaft noise as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium, characterized in that: When the instructions in the storage medium are executed by a processor of the terminal, the terminal is enabled to execute the active noise reduction method for integrating in-vehicle engine noise and transmission shaft noise as described in any one of claims 1 to 6.

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