Method, device, equipment and storage medium for identifying abnormal noise source location in vehicle

Abstract

A method, device, equipment, and storage medium for identifying the location of an abnormal noise source in a vehicle include: obtaining the reception time of an abnormal noise signal received by each of multiple sound-receiving units in an initial position arrangement; obtaining the possible source location of the abnormal noise signal based on the reception time and position of each sound-receiving unit; if there are multiple possible source locations, adjusting the position arrangement, and filtering the possible source locations based on the reception time and position of each sound-receiving unit after the position adjustment, until only one possible source location is determined as the source location of the abnormal noise. The possible source location of the abnormal noise signal is calculated based on the reception time of the abnormal noise signal received by the sound-receiving units in multiple positions. If multiple possible source locations are determined at a single time, the source location range can be narrowed by adjusting the positions of the sound-receiving units multiple times and repeating the calculation until the abnormal noise source location is determined.

Description

Technical Field

[0001] The present application relates to the field of in-vehicle fault detection, and specifically to a method, device, equipment and storage medium for identifying the location of an abnormal noise source in a vehicle. Background Art

[0002] With the ever-increasing number of cars on the road, vehicle noise is becoming an increasingly prominent issue. Vehicle noise is the most readily perceived vehicle characteristic by engineers. Abnormal noise, due to its randomness and poor sound quality, is considered to be associated with vehicle quality and reliability, making it a high risk for customer complaints. To improve the user experience, automakers invest significant resources in analyzing and controlling abnormal noise during R&D and warranty periods.

[0003] Because abnormal noise is highly random and often transient, it poses a significant challenge to engineers, and consumers are even more at a loss when faced with this issue. Engineers spend most of their time identifying and locating the source of the noise, relying primarily on subjective evaluation and empirical judgment. This requires extensive experience and is difficult to identify efficiently. Summary of the Invention

[0004] The present application provides a method, device, equipment and storage medium for identifying the location of abnormal noise sources in a vehicle, which can solve the problems existing in the above-mentioned related technologies.

[0005] In a first aspect, an embodiment of the present application provides a method for identifying the location of an abnormal noise source in a vehicle, which adopts the following technical solutions:

[0006] A method for identifying a location of an abnormal noise source in a vehicle, the method comprising:

[0007] Obtaining the reception time of the abnormal sound signal received by each of the multiple sound collecting units in the initial position arrangement;

[0008] Obtaining a possible source location of the abnormal sound signal based on the reception time and location of each sound receiving unit;

[0009] If there are multiple possible source positions, adjusting the position arrangement of the multiple sound collecting units;

[0010] Obtaining the reception time of the abnormal sound signal received by each of the multiple sound collecting units after the position adjustment;

[0011] The possible source positions are screened according to the receiving time of each sound collecting unit and the position of each sound collecting unit after the position adjustment, until only one possible source position is determined as the abnormal sound source position.

[0012] In combination with the first aspect, in one embodiment, obtaining the possible source location of the abnormal sound signal based on the reception time and the location of each sound collecting unit includes the following steps:

[0013] Obtaining a reception time difference between any two sound collecting units based on the time at which each sound collecting unit receives the frequency peak of the abnormal sound signal;

[0014] Determine the plane where the abnormal sound source is located and the plane circle where the abnormal sound source is located based on the reception time difference between any two sound collecting units and the distance between the two sound collecting units;

[0015] The possible source position of the abnormal sound signal is obtained based on the plane circle where the abnormal sound source is located determined by one or more pairs of sound collecting units.

[0016] In combination with the first aspect, in one embodiment, determining the plane where the abnormal sound source is located and the plane circle where the abnormal sound source is located based on the reception time difference between any two sound collecting units and the distance between the two sound collecting units includes the following steps:

[0017] Obtaining the distance between each of the two sound collecting units and the abnormal sound source based on the reception time difference between any two sound collecting units and the distance between the two sound collecting units;

[0018] The plane where the abnormal sound source is located and the plane circle where the abnormal sound source is located are determined according to the distance between each of the two sound collecting units and the abnormal sound source and the direction of the line connecting the two sound collecting units.

[0019] In combination with the first aspect, in one embodiment, the plane circle where the abnormal sound source is located is determined based on one or more pairs of sound collecting units to obtain the possible source position of the abnormal sound signal.

[0020] The possible source position is a common intersection of the plane circles where the multiple abnormal noise sources are located.

[0021] In combination with the first aspect, in one embodiment, the plane where the abnormal sound source is located and the plane circle where the abnormal sound source is located are determined based on the reception time difference between any two sound collecting units and the distance between the two sound collecting units, using the following formula:

[0022]

[0023] In the formula, xyz are the directions of the three-dimensional coordinate system with the midpoint of the line connecting the two sound collecting units as the coordinate origin, x is the direction of the line connecting the two sound collecting units, and x is the direction of the line connecting the two sound collecting units. s is the x-coordinate of each point on the plane circle where the abnormal sound source is located relative to the circle point, that is, the plane where the abnormal sound source is located, y s is the y-coordinate of the plane circle where the abnormal sound source is located, z sis the z-coordinate of the plane circle where the abnormal sound source is located, l1 and l2 are the distances between the two sound collecting units and the abnormal sound source respectively, and d is half the length of the line connecting the two sound collecting units.

[0024] In combination with the first aspect, in one embodiment, in the method of adjusting the position arrangement of the plurality of sound collecting units,

[0025] The positions of the various sound pickup units are adjusted synchronously using a preset adjustment method.

[0026] In combination with the first aspect, in one embodiment, the sound collecting unit is a plurality of sound collecting units arranged in the same mobile terminal, and the position of the mobile terminal in the vehicle is adjustable and movable.

[0027] In a second aspect, an embodiment of the present application provides a device for identifying the location of an abnormal noise source in a vehicle, which adopts the following technical solution:

[0028] A device for identifying the location of an abnormal sound source in a vehicle, comprising:

[0029] an acquisition module configured to acquire a reception time at which each of the plurality of sound collecting units receives an abnormal sound signal in an initial position arrangement;

[0030] The identification module is configured to obtain the possible source position of the abnormal sound signal based on the receiving time and position of each sound receiving unit; if there are multiple possible source positions, adjust the position arrangement of the multiple sound receiving units; obtain the receiving time of the abnormal sound signal received by each of the multiple sound receiving units after the position adjustment; and filter the possible source positions based on the receiving time and position of each sound receiving unit after the position adjustment, until there is only one possible source position, which is determined to be the source position of the abnormal sound.

[0031] In a third aspect, an embodiment of the present application provides a device for identifying the location of an abnormal noise source in a vehicle, which adopts the following technical solution:

[0032] A device for identifying the location of an abnormal sound source in a vehicle comprises a processor, a memory, and a program for identifying the location of an abnormal sound source in a vehicle stored in the memory and executable by the processor. When the program is executed by the processor, the steps of the method for identifying the location of an abnormal sound source in a vehicle are implemented.

[0033] In a fourth aspect, an embodiment of the present application provides a storage medium, which adopts the following technical solution:

[0034] A storage medium stores a program for identifying the location of an abnormal sound source in a vehicle. When the program is executed by a processor, the steps of the method for identifying the location of an abnormal sound source in a vehicle are implemented.

[0035] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0036] The system calculates the possible source locations of abnormal noise signals based on the time it takes for the sound pickup units in multiple locations to receive them. When multiple possible source locations are determined, the placement of the pickup units is further adjusted to obtain another batch of possible source locations. The actual source location of the abnormal noise is in one of these repeated locations, allowing for screening. Ultimately, by adjusting the positions of the pickup units multiple times and repeating the calculation, the range of possible source locations can be narrowed down until the source location is determined. This effectively improves the efficiency and accuracy of technicians in locating the source of abnormal noise in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a flow chart of an embodiment of a method for identifying the location of an abnormal noise source in a vehicle according to the present application;

[0038] Figure 2 This is a schematic diagram of the functional modules of an embodiment of the device for identifying the location of abnormal noise sources in a vehicle according to the present application;

[0039] Figure 3 This is a schematic diagram of the hardware structure of the device for identifying the location of abnormal noise sources in a vehicle involved in the embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 this application.

[0041] With the ever-increasing number of cars on the road, vehicle noise is becoming an increasingly prominent issue. Vehicle noise is the most readily perceived vehicle characteristic by engineers. Abnormal noise, due to its randomness and poor sound quality, is considered to be associated with vehicle quality and reliability, making it a high risk for customer complaints. To improve the user experience, automakers invest significant resources in analyzing and controlling abnormal noise during R&D and warranty periods.

[0042] Because abnormal noise is highly random and often transient, it poses a significant challenge to engineers, and consumers are even more at a loss when faced with this issue. Engineers spend most of their time identifying and locating the source of the noise, relying primarily on subjective evaluation and empirical judgment. This requires extensive experience and is difficult to identify efficiently.

[0043] Based on the above problems, this application proposes a method, device, equipment, and storage medium for identifying the location of abnormal noise sources in a vehicle. The key point of the invention is that the possible source locations of the abnormal noise signals are calculated and determined by the reception time of the abnormal noise signals by the sound receiving units in multiple positions. When multiple possible source locations are determined at a time, the position arrangement of the multiple sound receiving units is further changed to obtain another batch of possible source locations. The actual abnormal noise source location is in the repeated locations, so the possible source locations can be screened. Finally, before the source location can be determined, the source location range can be narrowed by repeatedly adjusting the positions of the sound receiving units and performing repeated calculations until the abnormal noise source location is determined. This effectively improves the efficiency and accuracy of technicians in determining the location of abnormal noise sources in the vehicle.

[0044] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0045] In a first aspect, an embodiment of the present application provides a method for identifying the location of an abnormal noise source in a vehicle.

[0046] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the method for identifying the location of abnormal noise sources in a vehicle. Figure 1 As shown, the method for identifying the location of the abnormal noise source in the vehicle includes:

[0047] S100, obtaining the reception time of the abnormal sound signal received by each of the plurality of sound collecting units in the initial position arrangement;

[0048] S200, obtaining a possible source location of the abnormal sound signal based on the reception time and location of each sound collecting unit;

[0049] S300: If there are multiple possible source positions, adjust the position arrangement of multiple sound collecting units;

[0050] S400, obtaining the reception time of the abnormal sound signal received by each of the plurality of sound collecting units after the position adjustment;

[0051] S500: Filter the possible source positions according to the reception time and the position of each sound collecting unit after position adjustment, until only one possible source position is determined as the abnormal sound source position.

[0052] In this embodiment, the possible source locations of the abnormal noise signals are calculated based on the time difference between the reception times of any two sound collecting units, based on the reception times of the abnormal noise signals at multiple sound collecting units. When multiple possible source locations are determined in a single calculation, the placement of the multiple sound collecting units is further varied to obtain another batch of possible source locations. The actual source location of the abnormal noise is located in one of these repeated locations, thus enabling the possible source locations to be screened. Ultimately, before the source location becomes undetermined, the source location range can be narrowed down by repeatedly adjusting the positions of the sound collecting units and performing repeated calculations until the specific source location is determined. This effectively improves the efficiency and accuracy of technicians in locating the source of abnormal noises in the vehicle.

[0053] Each placement process in different embodiments involves at least two or more sound collection units. For example, in some embodiments, two sound collection units are deployed in the first placement process, and two processing units are used to determine at most two or a single possible source location. Once two possible source locations are determined, the placement process is further adjusted, and the possible source location is recalculated based on the adjusted placement process. The source location of the abnormal sound will be located at an overlapping location between the two possible source locations.

[0054] Furthermore, in one embodiment, step S200, obtaining the possible source location of the abnormal sound signal based on the reception time and the location of each sound collecting unit, includes the following steps:

[0055] S210, obtaining a reception time difference between any two sound collecting units based on the time at which each sound collecting unit receives the frequency peak of the abnormal sound signal;

[0056] Specifically, after receiving the sound signal, the frequency range and main components of the abnormal sound will be determined through the filtering and playback functions in the software, and the abnormal sound signal containing the abnormal sound components will be obtained after filtering. The time difference between the frequency peaks of the two abnormal sound signals will be used as the receiving time difference between the two sound receiving units.

[0057] S220: Determine the plane where the abnormal sound source is located and the plane circle where the abnormal sound source is located based on the reception time difference between any two sound collecting units and the distance between the two sound collecting units;

[0058] Specifically, step S220 includes the following steps:

[0059] S221. Obtaining the distance between each of the two sound collecting units and the abnormal sound source based on the reception time difference between any two sound collecting units and the distance between the two sound collecting units;

[0060] S222: Determine the plane where the abnormal sound source is located and the plane circle where the abnormal sound source is located according to the distance between each of the two sound collecting units and the abnormal sound source and the direction of the line connecting the two sound collecting units.

[0061] Step S221 and step S222 respectively use the following formulas:

[0062]

[0063] Where xyz is the three-dimensional coordinate system with the midpoint of the line connecting the two sound collecting units as the origin, and the x direction is the direction of the line connecting the two sound collecting units. For example, when the x direction is the vehicle width, the y direction and the z direction are the vehicle length and vehicle height, respectively.

[0064] x s is the x-coordinate of each point on the plane circle where the abnormal sound source is located relative to the circle point, that is, the plane where the abnormal sound source is located;

[0065] y s is the y-coordinate of the plane circle where the abnormal noise source is located;

[0066] z s is the z-coordinate of the plane circle where the abnormal noise source is located;

[0067] l1 and l2 are the distances between the two sound collecting units and the abnormal sound source respectively;

[0068] d is half the length of the connection between the two sound receiving units.

[0069] S230: Obtain a possible source position of the abnormal sound signal according to the plane circle where the abnormal sound source is located determined by one or more pairs of sound collecting units.

[0070] Specifically, the possible source location is the common intersection of the planar circles containing the multiple abnormal noise sources. It should be noted that the number of these circles may be one or two. If there is only one, the source location can be directly determined. If there are two, it is necessary to further narrow the location range based on the calculation structure after adjusting the placement of the sound collection units until the source location is determined.

[0071] Furthermore, in some embodiments, when adjusting the position arrangement of the plurality of sound collecting units,

[0072] The positions of the various sound pickup units are adjusted synchronously using a preset adjustment method.

[0073] Specifically, the relative positions of the multiple sound collecting units are fixed. For example, the multiple sound collecting units are uniformly installed on one device, and the positions of the various sound collecting units can be synchronously adjusted by adjusting the device as a whole.

[0074] In this embodiment, the sound pickup units are multiple units located within the same mobile terminal, specifically two units. These units are located at either end of the mobile terminal, serving as the primary and secondary sound pickups. Furthermore, the position of the mobile terminal within the vehicle is adjustable. Consequently, the placement of the two sound pickup units can be adjusted simply by adjusting the position of the mobile terminal within the vehicle.

[0075] In this embodiment, when adjusting the mobile terminal, the adjustment is achieved by rotating the mobile terminal in three dimensions with the center position of the mobile terminal as the center of the circle. Therefore, the positions of the two sound receiving units thereon can be quickly adjusted without changing the center position of the mobile terminal. For example, the mobile terminal can be rotated so that its length direction is parallel to the z direction of the vertical plane or the x direction and y direction of the horizontal plane.

[0076] Ultimately, the system calculates the possible source locations of the abnormal noise signals based on the time it takes for the sound pickup units in multiple locations to receive them. When multiple possible source locations are determined, the placement of the multiple sound pickup units is further adjusted to obtain another batch of possible source locations. The actual source of the abnormal noise is located in these repeated locations, allowing for screening. Ultimately, before the source location becomes undetermined, the system repeatedly adjusts the positions of the sound pickup units and calculates the source location repeatedly, narrowing the range of possible locations until the source location is determined. This effectively improves the efficiency and accuracy of technicians in locating the source of abnormal noise in the vehicle.

[0077] In a second aspect, an embodiment of the present application also provides a device for identifying the location of an abnormal noise source in a vehicle.

[0078] In one embodiment, referring to Figure 2 , Figure 2 This is a functional module diagram of an embodiment of the device for identifying the location of abnormal noise sources in a vehicle. Figure 2 As shown, the device for identifying the location of abnormal noise source in a vehicle includes:

[0079] an acquisition module configured to acquire a reception time at which each of the plurality of sound collecting units receives an abnormal sound signal in an initial position arrangement;

[0080] The identification module is configured to obtain the possible source position of the abnormal sound signal based on the receiving time and position of each sound receiving unit; if there are multiple possible source positions, adjust the position arrangement of the multiple sound receiving units; obtain the receiving time of the abnormal sound signal received by each of the multiple sound receiving units after the position adjustment; and filter the possible source positions based on the receiving time and position of each sound receiving unit after the position adjustment, until there is only one possible source position, which is determined to be the source position of the abnormal sound.

[0081] Furthermore, in one embodiment, when the identification module executes the step of obtaining the possible source location of the abnormal sound signal based on the reception time and the location of each sound receiving unit, the identification module includes the following steps:

[0082] Obtaining a reception time difference between any two sound collecting units based on the time at which each sound collecting unit receives the frequency peak of the abnormal sound signal;

[0083] Determine the plane where the abnormal sound source is located and the plane circle where the abnormal sound source is located based on the reception time difference between any two sound collecting units and the distance between the two sound collecting units;

[0084] The possible source position of the abnormal sound signal is obtained based on the plane circle where the abnormal sound source is located determined by one or more pairs of sound collecting units.

[0085] Furthermore, in one embodiment, when the identification module performs the step of determining the plane where the abnormal sound source is located and the plane circle where the abnormal sound source is located based on the reception time difference between any two sound collecting units and the distance between the two sound collecting units, the following steps are included:

[0086] Obtaining the distance between each of the two sound collecting units and the abnormal sound source based on the reception time difference between any two sound collecting units and the distance between the two sound collecting units;

[0087] The plane where the abnormal sound source is located and the plane circle where the abnormal sound source is located are determined according to the distance between each of the two sound collecting units and the abnormal sound source and the direction of the line connecting the two sound collecting units.

[0088] Furthermore, in one embodiment, when the identification module performs the step of determining the plane where the abnormal sound source is located and the plane circle where the abnormal sound source is located based on the distance between each of the two sound collecting units and the abnormal sound source and the direction of the line connecting the two sound collecting units, the following formula is used:

[0089]

[0090] In the formula, x is the direction of the line connecting the two sound collecting units. The combination of x, y and z constitutes a three-dimensional direction. sis the x-coordinate of each point on the plane circle where the abnormal sound source is located relative to the circle point, that is, the plane where the abnormal sound source is located, y s is the y-coordinate of the plane circle where the abnormal sound source is located, z s is the z-coordinate of the plane circle where the abnormal sound source is located, l1 and l2 are the distances between the two sound collecting units and the abnormal sound source respectively, and d is half the length of the line connecting the two sound collecting units.

[0091] Furthermore, in one embodiment, when the identification module obtains the possible source position of the abnormal sound signal based on the plane circle where the abnormal sound source is located determined by one or more pairs of sound collecting units, the possible source position is the common intersection of the plane circles where the multiple abnormal sound sources are located.

[0092] Furthermore, in one embodiment, when adjusting the position arrangement of the plurality of sound collecting units, the recognition module synchronously adjusts the position of each sound collecting unit in a preset adjustment manner.

[0093] Among them, the functional implementation of each module in the above-mentioned device for identifying the location of the abnormal sound source in the vehicle corresponds to the various steps in the above-mentioned embodiment of the method for identifying the location of the abnormal sound source in the vehicle, and their functions and implementation processes will not be repeated here one by one.

[0094] In a third aspect, an embodiment of the present application provides a device for identifying the location of an abnormal sound source in a vehicle. The device for identifying the location of an abnormal sound source in a vehicle may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0095] Reference Figure 3 , Figure 3 Schematic diagram of the hardware structure of the device for identifying the location of abnormal noise source in a vehicle involved in the embodiment of the present application. In the embodiment of the present application, the device for identifying the location of abnormal noise source in a vehicle may include a processor, a memory, a communication interface, and a communication bus.

[0096] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0097] Communication interfaces include input / output (I / O), physical, and logical interfaces, which interconnect components within the in-vehicle abnormal sound source location identification device, as well as interfaces that connect the device to other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet, fiber optic, and ATM interfaces; user devices can include displays and keyboards.

[0098] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0099] The processor can be a general-purpose processor that can invoke a vehicle interior abnormal sound source location identification program stored in a memory and execute the vehicle interior abnormal sound source location identification method provided in the embodiments of the present application. For example, the general-purpose processor can be a central processing unit (CPU). The methods executed when the vehicle interior abnormal sound source location identification program is invoked can be referenced from the various embodiments of the vehicle interior abnormal sound source location identification method of the present application and will not be further described here.

[0100] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0101] In a fourth aspect, an embodiment of the present application also provides a storage medium.

[0102] The storage medium of the present application stores a program for identifying the location of an abnormal sound source in a vehicle. When the program for identifying the location of an abnormal sound source in a vehicle is executed by a processor, the steps of the method for identifying the location of an abnormal sound source in a vehicle as described above are implemented.

[0103] Among them, the method implemented when the abnormal sound source location identification program in the vehicle is executed can refer to the various embodiments of the abnormal sound source location identification method in the vehicle of the present application, and will not be repeated here.

[0104] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0105] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0106] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0107] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0108] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0109] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of the present application.

[0110] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for identifying the location of abnormal noise sources in a vehicle, characterized in that: The method for identifying the position of an abnormal noise source in a vehicle comprises: S1: Obtaining the reception time of the abnormal sound signal received by each of the multiple sound collecting units in the initial position arrangement; S2: Obtaining the possible source location of the abnormal sound signal based on the reception time and location of each sound receiving unit; S3: If there are multiple possible source positions, adjust the position arrangement of multiple sound collecting units; S4: Obtaining the reception time of the abnormal sound signal received by each of the multiple sound collecting units after the position adjustment; S5: screening the possible source positions according to the reception time of each sound collecting unit and the position of each sound collecting unit after the position adjustment, until only one possible source position is determined as the abnormal sound source position; The S2 comprises the following steps: Obtaining a reception time difference between any two sound collecting units based on the time at which each sound collecting unit receives the frequency peak of the abnormal sound signal; Obtaining the distance between each of the two sound collecting units and the abnormal sound source based on the reception time difference between any two sound collecting units and the distance between the two sound collecting units; According to the distance between each of the two sound collecting units and the abnormal sound source and the direction of the line between the two sound collecting units, the plane where the abnormal sound source is located and the plane circle where the abnormal sound source is located are determined. Specifically, the following formula is used: Where xyz are the directions of the three-dimensional coordinate system with the midpoint of the line connecting the two sound collecting units as the coordinate origin, x is the direction of the line connecting the two sound collecting units, and x is the direction of the line connecting the two sound collecting units. s is the x-coordinate of each point on the plane circle where the abnormal sound source is located relative to the origin, that is, the plane where the abnormal sound source is located, y s is the y-coordinate of the plane circle where the abnormal sound source is located, z s is the z-coordinate of the plane circle where the abnormal sound source is located, l1 and l2 are the distances between the two sound collecting units and the abnormal sound source respectively, and d is half the length of the line connecting the two sound collecting units; The possible source position of the abnormal sound signal is obtained based on the plane circle where the abnormal sound source is located determined by one or more pairs of sound collecting units.

2. The method for identifying the location of abnormal noise source in a vehicle according to claim 1, wherein: The plane circle where the abnormal sound source is located is determined based on one or more pairs of sound collecting units to obtain the possible source position of the abnormal sound signal. The possible source position is a common intersection of the plane circles where the multiple abnormal noise sources are located.

3. The method for identifying the location of abnormal noise source in a vehicle according to claim 1, wherein: In the method of adjusting the positions of the plurality of sound collecting units, The positions of the various sound pickup units are adjusted synchronously using a preset adjustment method.

4. The method for identifying the location of abnormal noise source in a vehicle according to claim 1, wherein: The sound collecting units are multiple sound collecting units arranged in the same mobile terminal, and the position of the mobile terminal in the vehicle is adjustable and movable.

5. A device for identifying the location of an abnormal noise source in a vehicle using the method for identifying the location of an abnormal noise source in a vehicle according to any one of claims 1 to 4, characterized in that: The device for identifying the position of an abnormal noise source in a vehicle comprises: an acquisition module configured to acquire a reception time at which each of the plurality of sound collecting units receives an abnormal sound signal in an initial position arrangement; The identification module is configured to obtain the possible source position of the abnormal sound signal based on the receiving time and position of each sound receiving unit; if there are multiple possible source positions, adjust the position arrangement of the multiple sound receiving units; obtain the receiving time of the abnormal sound signal received by each of the multiple sound receiving units after the position adjustment; and filter the possible source positions based on the receiving time and position of each sound receiving unit after the position adjustment, until there is only one possible source position, which is determined to be the source position of the abnormal sound.

6. A device for identifying the location of abnormal noise sources in a vehicle, characterized in that: The device for identifying the location of an abnormal sound source in a vehicle includes a processor, a memory, and a program for identifying the location of an abnormal sound source in a vehicle stored in the memory and executable by the processor. When the program is executed by the processor, the steps of the method for identifying the location of an abnormal sound source in a vehicle are implemented as described in any one of claims 1 to 4.

7. A storage medium, characterized in that: The storage medium stores a program for identifying the location of an abnormal sound source in a vehicle. When the program is executed by the processor, the steps of the method for identifying the location of an abnormal sound source in a vehicle are implemented as claimed in any one of claims 1 to 4.

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