Range extender noise detection method and system, equipment, medium and product

Abstract

The invention relates to a range extender noise detection method and system, equipment, a medium and a product. The detection method comprises the following steps: acquiring a noise signal of a target position in the range extender, and determining the interval time of the noise signal; determining a noise frequency band of the noise signal, and determining an order of the noise signal according to the interval time; determining a modulation proportion of the target noise in a target noise frequency band corresponding to the order; the modulation proportion is determined according to a first modulation depth of the target noise, the noise signal comprises the target noise, and the noise frequency band comprises a target noise frequency band; and in response to the condition that the modulation proportion is greater than a preset modulation threshold, determining that the target noise exceeds the standard. By adopting the method, whether the target noise of the range extender reaches the standard or not can be judged according to the modulation proportion of the target noise in the target noise frequency band corresponding to the order, the target noise of the range extender is accurately detected and evaluated, the working noise control level of the range extender is improved, and risks are avoided for the whole vehicle.

Description

Technical Field

[0001] The present application relates to the technical field of noise detection, and in particular to a method and system, equipment, medium, and product for detecting range extender noise. Background Art

[0002] NVH (Noise, Vibration, Harshness) is a comprehensive issue to measure the quality of automobile manufacturing. It gives users the most direct and superficial experience, and is also one of the key issues that major vehicle manufacturers and parts companies in the international automobile industry are concerned about. Under the parking power generation condition, the "dong dong" knocking sound of the range extender has a certain regularity and intermittentness, but this knocking sound not only affects the quiet environment in the car, but may also cause users to have doubts about the quality of the vehicle. In the related technology, starting from the hardware of the range extender body, the noise source of the engine is reduced, but the engine needs to strengthen the strength of components such as the cylinder block and crankshaft, and there are problems such as long optimization cycle, high cost, and unsatisfactory optimization effect. Therefore, there is an urgent need for a detection method for range extender noise to improve the working noise control level of the range extender. Summary of the invention

[0003] Based on this, a method and system, equipment, medium and product for detecting range extender noise are provided to solve the problem that the noise level of the range extender cannot be accurately assessed in the prior art.

[0004] In a first aspect, a method for detecting range extender noise is provided, the detection method comprising:

[0005] Acquiring a noise signal at a target position in the range extender and determining an interval time of the noise signal;

[0006] Determine a noise frequency band of the noise signal, and determine an order of the noise signal according to the interval time;

[0007] Determine a modulation ratio of a target noise in a target noise frequency band corresponding to the order; the modulation ratio is determined according to a first modulation depth of the target noise, the noise signal includes the target noise, and the noise frequency band includes the target noise frequency band;

[0008] In response to the modulation ratio being greater than a preset modulation threshold, it is determined that the target noise exceeds a standard.

[0009] Optionally, obtaining a noise signal at a target position in the range extender includes:

[0010] Acquiring vibration information of the target position;

[0011] A noise signal at the target position is acquired according to the vibration information.

[0012] Optionally, determining the noise frequency band of the noise signal comprises:

[0013] Determine initial noise data of the noise signal; the initial noise data includes a frequency bandwidth of the noise signal, and the initial noise data is obtained according to an acoustic sensor;

[0014] According to the frequency bandwidth, the initial noise data is divided into at least two noise frequency bands according to a preset rule.

[0015] Optionally, determining the order of the noise signal according to the interval time includes:

[0016] At least two orders of the noise signal are determined according to the interval time.

[0017] Optionally, the determining a modulation ratio of a target noise in a target noise frequency band corresponding to the order includes:

[0018] determining a noise frequency band corresponding to each of the orders, and determining a first modulation depth of the target noise in the noise frequency band;

[0019] determining a target noise frequency band in the noise frequency band according to the first modulation depth;

[0020] A modulation ratio of the target noise is determined according to the first modulation depth and the target noise frequency band.

[0021] Optionally, determining the modulation ratio of the target noise according to the first modulation depth and the target noise frequency band includes:

[0022] determining a sum of the first modulation depths in the target noise frequency band as a first value;

[0023] Determining a sum of second modulation depths in the noise frequency band as a second value;

[0024] The modulation ratio of the target noise is determined according to the ratio of the first value to the second value.

[0025] In a second aspect, a range extender noise detection system is provided, the detection system comprising:

[0026] An acquisition module, used for acquiring a noise signal at a target position in the range extender and determining an interval time of the noise signal;

[0027] A first determination module, used to determine a noise frequency band of the noise signal, and determine an order of the noise signal according to the interval time;

[0028] A second determination module is used to determine a modulation ratio of a target noise in a target noise frequency band corresponding to the order; the modulation ratio is determined according to a first modulation depth of the target noise, the noise signal includes the target noise, and the noise frequency band includes the target noise frequency band;

[0029] The third determination module is used to determine that the target noise exceeds the standard in response to the modulation ratio being greater than a preset modulation threshold.

[0030] According to a third aspect, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and used to run on the processor, wherein the processor implements the method described in the first aspect when executing the computer program.

[0031] According to a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the method described in the first aspect is implemented.

[0032] According to a fifth aspect, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a processor, the method described in the first aspect is implemented.

[0033] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present application.

[0034] The above-mentioned range extender noise detection method, system, equipment, medium, and product determine whether the target noise of the range extender meets the standard based on the modulation ratio of the target noise in the target noise frequency band corresponding to the order, accurately detect and evaluate the target noise of the range extender, improve the working noise control level of the range extender, and avoid risks for the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 1 is a flow chart of a method for detecting range extender noise in one embodiment;

[0036] Figure 2 Schematic diagram of the structure of a range extender noise detection system in one embodiment;

[0037] Figure 3 FIG. 1 is a schematic diagram of the structure of an electronic device in an embodiment. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] It should be noted that the diagram provided in the present embodiment only illustrates the basic concept of the present application in a schematic manner, so the diagram only shows the components related to the present application rather than drawing according to the number, shape and size of the components during actual implementation. The type, quantity and ratio of each component during actual implementation can be a random change, and its component layout type may also be more complicated. The structure, ratio, size, etc. illustrated by the accompanying diagram of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the restrictive conditions that can be implemented in this application, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that can be produced by this application and the purpose that can be achieved, should still fall within the scope that the technical content disclosed in this application can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are also only for the convenience of narration, rather than for limiting the scope that can be implemented in this application. The change or adjustment of its relative relationship, without substantial change of technical content, should also be regarded as the scope that can be implemented in this application.

[0040] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the text does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] As shown in this document, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural, unless the context clearly indicates an exception. Generally speaking, the terms "include" and "comprise" only indicate that the steps and elements that have been clearly identified are included, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0042] The definitions of inclusion in this document, such as the terms "having", "may have", "include" or "may include" used herein, indicate the existence of the corresponding functions, operations, elements, etc. herein, and do not limit the existence of one or more other functions, operations, elements, etc. In addition, it should be understood that the terms "including" or "having" used herein indicate the existence of the features, numbers, steps, operations, elements, components, or a combination thereof described in the specification, without excluding the existence or addition of one or more other features, numbers, steps, operations, elements, components, or a combination thereof.

[0043] In the embodiments of the present application, prefixes such as "first" and "second" are used only to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. The use of prefixes such as ordinal numbers to distinguish description objects in the embodiments of the present application does not constitute a limitation on the described objects. For the statement of the described + object, please refer to the description in the context of the claims or embodiments, and no unnecessary limitation should be constituted due to the use of such prefixes. In addition, in the description of the present embodiment, unless otherwise specified, the meaning of "multiple" is two or more.

[0044] NVH is a comprehensive issue to measure the quality of automobile manufacturing. It gives users the most direct and superficial experience, and is also one of the key issues that major vehicle manufacturers and parts companies in the international automobile industry pay attention to. Statistics show that about 1 / 3 of vehicle failures are related to vehicle NVH problems, and nearly 20% of major companies' R&D expenses are spent on solving vehicle NVH problems.

[0045] Under the condition of parking power generation, the "dong dong" knocking sound of the range extender has a certain regularity and intermittence. This knocking sound is usually dull, and the sound intensity may vary depending on the vehicle model, working conditions and the state of the range extender. Specifically, during the operation of the range extender, a sound similar to knocking on metal is emitted from time to time, giving people a sense of disharmony. This knocking sound not only affects the quiet environment in the car, but may also make users doubt the quality of the vehicle.

[0046] The knocking sound of the range extender will not only reduce the comfort of the vehicle, but may also affect the user's evaluation of the vehicle quality. Therefore, it is of great practical significance to establish a scientific and reasonable bench evaluation scheme to accurately evaluate and optimize the knocking sound of the range extender. The optimization of the working noise of the range extender in the prior art mainly focuses on the hardware of the range extender body and the transmission path of the whole vehicle. Reducing the noise source of the engine can essentially improve the "dongdong" knocking sound, but the engine needs to strengthen the strength of components such as the cylinder block and crankshaft. This method has the disadvantages of long optimization cycle, high cost, and unsatisfactory optimization effect. Improving the technical level of the powertrain suspension can reduce the degree of low-frequency "dongdong" sound transmitted to the car and improve the subjective feeling of the driver and passengers in the car. However, the use of a higher technical level of suspension, such as full hydraulic suspension, electromagnetic active control suspension, etc., will bring about a large cost increase and layout problems. In order to overcome these problems, it is necessary to explore a new evaluation method to improve the working noise control level of the range extender.

[0047] Figure 1 A method for detecting range extender noise is provided for an exemplary embodiment of the present application, and the detection method includes:

[0048] S11. Acquire a noise signal at a target position in the range extender, and determine an interval time of the noise signal.

[0049] Among them, the range extender can be placed on a test bench and the acoustic sensor in the test bench can be used to obtain the noise signal of the target position in the range extender. The noise signal includes the knocking noise, combustion noise, mechanical noise, intake and exhaust noise, etc. of the range extender.

[0050] The target position in the range extender is set according to the actual situation, for example, it can be the position 1m from the exhaust side of the range extender, the position 1m from the intake side, the position 1m from the front end, the position 1m from the rear end, etc. By obtaining the ignition advance angle, cylinder pressure, noise signal and vibration signal of the range extender on the test bench, angle domain analysis and wavelet analysis can be performed to confirm the position and frequency of the test point with obvious knocking characteristics and other related information, and determine the target position, for example, the target position is the position 1m from the exhaust side of the range extender.

[0051] The range extender includes an internal combustion engine and an engine. Taking a four-stroke engine as an example, a complete working cycle of a four-stroke engine includes four strokes: intake, compression, power, and exhaust. The range extender may generate knocking noise in different strokes, so we can first determine the interval time of the acquired noise signal, and then determine the interval time of the noise signal based on the test bench, and judge the specific stroke that generates the knocking noise based on the interval time of the noise signal.

[0052] In order to improve the accuracy of obtaining the noise signal, in one embodiment, the vibration information of the target position may be obtained first, and then the noise signal of the target position may be obtained according to the vibration information.

[0053] Vibration information can be used to determine which part of the range extender is causing abnormal vibration, and then determine the specific source of the noise signal. For example, if the vibration information shows that the alternating torque generated by the rotation of the engine crankshaft causes a large vibration, it can be determined that the engine combustion noise and mechanical noise of the range extender are the main sources of the noise signal. On the basis of obtaining the vibration information, the ignition signal and cylinder pressure information of the range extender can also be extracted at the same time to support the selection direction of the vibration information, determine the working information of the engine, and confirm the main source of the noise signal.

[0054] S12. Determine a noise frequency band of the noise signal, and determine an order of the noise signal according to the interval time.

[0055] The noise signal is input into the analysis software, such as ArtemiS SUITE (software platform for sound and vibration analysis), and the noise data of the noise signal at the target position can be confirmed, and the interval time of the noise signal can be determined according to the noise data, and the working stroke of the range extender that specifically generates the noise signal can be determined according to the interval time. Taking a four-stroke engine as an example, a complete working cycle of a four-stroke engine includes four strokes: intake, compression, power, and exhaust. For example, according to the interval time, the ignition time and intake stroke generation of the noise signal in the working cycle are determined, and then the order of the noise signal can be determined to be 0.5 and 1.0. Among them, the crankshaft of the engine needs to rotate 2 times, and there are four stroke stages, corresponding to the 2nd order, the 0.5th order is a moment in the intake stroke of the engine when the cylinder bearing seat is knocked, and the 1st order is a position on the bearing seat after the crankshaft of the engine rotates one circle.

[0056] In order to more accurately identify the noise signals generated by different components of the range extender, in one embodiment, determining the noise frequency band of the noise signal includes:

[0057] Determine initial noise data of the noise signal; wherein the initial noise data includes a frequency bandwidth of the noise signal, and the initial noise data is obtained according to an acoustic sensor;

[0058] According to the frequency bandwidth, the initial noise data is divided into at least two noise frequency bands according to a preset rule.

[0059] The preset rules are set according to the actual situation. For example, the noise frequency bands can be divided into 50 Hz intervals or 100 Hz intervals.

[0060] The noise signal is acquired through an acoustic sensor, and the initial noise data of the noise signal is determined. The initial noise data includes the frequency bandwidth of the noise signal. For example, if the frequency bandwidth is 100Hz to 630Hz, the preset rule of dividing the noise frequency band at intervals of 100Hz can be followed. In the Critical bands module of ArtemiS SUITE software, BandNumber (critical band numbering) can be used to divide 100Hz to 600Hz into 5 noise frequency bands, each of which is 100Hz to 200Hz, 200Hz to 300Hz, 300Hz to 400Hz, 400Hz to 510Hz, and 510Hz to 630Hz. The initial noise data is divided into multiple noise frequency bands, so that the multiple noise frequency bands can be analyzed separately to more accurately determine the source of the noise signal.

[0061] In one embodiment, determining the order of the noise signal according to the interval time includes:

[0062] At least two orders of the noise signal are determined based on the interval time.

[0063] The speed of the range extender is usually determined during the design and testing phase. For example, the working condition of the range extender is 3Kw@1000rpm, indicating that the output power of the range extender is 3 kilowatts (kW) at a speed of 1000 revolutions per minute (rpm). After determining the speed of the range extender, the rotational frequency of the range extender can be determined according to the speed, and then the vibration frequency of the range extender can be determined according to the rotational frequency. Finally, the interval time of the working process of the range extender can be determined according to the vibration frequency. The knocking noise of the range extender is generated in at least two working strokes, and at least two orders of the noise signal can be determined according to the interval time.

[0064] S13. Determine a modulation ratio of the target noise in a target noise frequency band corresponding to the order.

[0065] The modulation ratio is determined according to the first modulation depth of the target noise. The modulation depth indicates the percentage of amplitude change of the noise signal during the modulation process, indicating the amplitude change range.

[0066] The noise signal includes target noise, and the target noise may be knocking noise of the range extender.

[0067] The noise frequency band includes a target noise frequency band. Because there are different types of noise in each noise frequency band, the second modulation depth in the noise frequency band indicates the energy proportion of all types of noise, and the energy proportion of the target noise in the target noise frequency band is the first modulation depth. Therefore, the target noise frequency band indicates that the first modulation depth of the target noise is greater than the preset modulation depth. It can be understood as a noise frequency band in which the knocking noise of the range extender accounts for a large proportion.

[0068] In one embodiment, determining a modulation ratio of a target noise in a target noise frequency band corresponding to an order includes:

[0069] determining a noise frequency band corresponding to each order, and determining a first modulation depth of the target noise in the noise frequency band;

[0070] determining a target noise frequency band in the noise frequency band according to the first modulation depth;

[0071] A modulation ratio of the target noise is determined according to the first modulation depth and the target noise frequency band.

[0072] After determining at least two orders, the first modulation depth of the target noise in the noise frequency band corresponding to each order is different. The noise signal can be input into the analysis software, such as the ArtemiS SUITE software of the ArtemiS SUITE platform, and the noise frequency band is processed by Emelopt lowpais (an analysis function in the software) and Spectrum Size (spectrum size), and then the first modulation depth of the target noise is obtained by modulation spectrum vs. Band (an analysis function in the software, used to analyze the modulation characteristics of the signal) and Wavelet (an analysis function in the software, used to analyze the time-frequency characteristics of the signal). For example, when the order is 0.5 and 1.0, the noise frequency band can be 100Hz~200Hz, 200Hz~300Hz, 300Hz~400Hz, 400Hz~510Hz, 510Hz~630Hz. At 0.5 and 1.0 orders, the first modulation depth of the target noise in each noise frequency band can be:

[0073] ①, 0.5EO (100Hz~200Hz) is 10.44%;

[0074] ②, 0.5EO (200Hz~300Hz) is 11.57%;

[0075] ③, 0.5EO (300Hz~400Hz) is 13.79%;

[0076] ④, 0.5EO (400Hz~510Hz) is 29.47%;

[0077] ⑤, 0.5EO (510Hz~630Hz) is 11.52%;

[0078] ⑥, 1.0EO (100Hz~200Hz) is 71.20%;

[0079] ⑦, 1.0EO (200Hz~300Hz) is 68.14%;

[0080] ⑧, 1.0EO (300Hz~400Hz) is 87.16%;

[0081] ⑨, 1.0EO (400Hz~510Hz) is 34.04%;

[0082] ⑩, 1.0EO (510Hz~630Hz) is 26.11%;

[0083] 0.5EO (Engine Order) is 0.5 order, indicating that the engine crankshaft rotates half a circle and hits the cylinder bearing seat at a certain moment in the intake stroke. 1EO is 1 order, indicating that the engine crankshaft rotates one circle and hits a certain position on the bearing seat. Taking 0.5EO (100-200) as 10.44% in formula ① as an example, it indicates that at 0.5 order, the first modulation depth of the target noise in the noise frequency band of 100Hz-200Hz is 10.44%, and so on. Formulas ② to ⑩ are the same. Since there will be different types of noise in each noise frequency band, the modulation depth in ①~⑩ is not necessarily the first modulation depth of the target noise. Therefore, the first modulation depth of the target noise in the noise frequency band can be determined first, and then the noise frequency band with a larger first modulation depth of the target noise is determined as the target noise frequency band. For example, if the first modulation depth of the target noise is larger in the range of 400Hz~630Hz, 400Hz~630Hz is determined as the target noise frequency band. Finally, the modulation ratio of the target noise is determined according to the first modulation depth and the target noise frequency band.

[0084] In one embodiment, determining the modulation ratio of the target noise according to the first modulation depth and the target noise frequency band includes:

[0085] determining a sum of first modulation depths in a target noise frequency band as a first value;

[0086] determining a sum of second modulation depths in the noise frequency band as a second value;

[0087] The modulation ratio of the target noise is determined according to the ratio of the first value to the second value.

[0088] As shown in the above formulas ① to ⑩, after determining the target noise in the target noise frequency band, first determine the noise frequency band with a larger first modulation depth of the target noise as the target noise frequency band, and then calculate the sum of the first modulation depths of the target noise in the target noise frequency band as the first value. For example, 400 Hz to 630 Hz is the target noise frequency band, then calculate the sum of the first modulation depths of the target noise frequency bands in the 0.5 order and the 1.0 order. The first value in the 0.5 order can be calculated according to formulas ④ and ⑤, expressed as 0.5EO=sum(④+⑤)=29.47%+11.52%=40.99%, and the second value in the 1.0 order is calculated according to formulas ⑨ and ⑩, 1.0EO=sum(⑨+⑩)=34.04%+26.11%=60.15%. The sum of the first modulation depths in the target noise frequency band of order 0.5, that is, the first value, is 40.99%, and the sum of the first modulation depths in the target noise frequency band of order 1.0, that is, the first value, is 60.15%. Next, calculate the sum of the second modulation depths in the noise frequency bands of 0.5 order and 1.0 order. The second value in 0.5 order can be calculated according to formula ① to ⑤, which is expressed as 0.5EO=sum(①+②+③+④+⑤)=10.44%+11.57%+13.79%+29.47%+11.52%=76.79%. The second value in 1.0 order can be calculated according to formula ⑥ to ⑩, 1.0EO=sum(⑥+⑦+⑧+⑨+⑩)=71.20%+68.14%+87.16%+34.04%+26.11%=286.65%. The sum of the second modulation depths in the noise frequency band of 0.5 order, that is, the second value is 76.79%, and the sum of the second modulation depths in the noise frequency band of 1.0 order, that is, the second value is 286.65%.

[0089] Then, according to the ratio of the first value to the second value, the modulation ratio of the target noise is determined. For example, the ratio of the first value to the second value can be obtained by the formula Rate0.5EO=sum(④+⑤) / sum(①+②+③+④+⑤)=(29.47%+11.52%) / 76.79%=53.38%, Rate1.0EO=sum(⑨+⑩) / sum(⑥+⑦+⑧+⑨+⑩)=(34.04%+26.11%) / 286.65%=20.98%. Then, according to the ratio of the first value to the second value, the RSS (Root Sum Squares) values ​​of 0.5EO and 1EO are calculated. The formula RSS=(Rate0.5EO 2 +Rate 1EO 2 ) 0.5 =(53.38% 2 +20.98% 2 ) 0.5=0.33, the modulation ratio of the target noise is 0.33.

[0090] S14: In response to the modulation ratio being greater than a preset modulation threshold, determining that the target noise exceeds a standard.

[0091] The modulation threshold is set according to the actual situation.

[0092] When the modulation ratio is greater than a preset modulation threshold, it is determined that the modulation depth of the target noise in the noise frequency band is too large, indicating that the energy of the target noise is too large, and it is determined that the target noise exceeds the standard.

[0093] As in the above steps for calculating the modulation ratio, the modulation ratios of different parking power generation conditions can be calibrated and counted, and then the modulation threshold can be obtained based on experience. For example, the modulation threshold can be determined based on the size of the target noise that people can accept, and the size of the modulation ratio and the modulation threshold can be compared. If the modulation ratio is greater than the preset modulation threshold, it is determined that the target noise exceeds the standard, that is, the knocking noise of the range extender exceeds the standard.

[0094] The embodiments provided in this application clarify the measurement method, data processing method and detection method of the noise signal in the range extender. By judging the size of the target noise, it is determined whether the knocking noise meets the standard. When the modulation depth of the target noise in the noise signal is too large, it is determined that the target noise exceeds the standard. The knocking noise of the range extender is accurately detected and evaluated, the working noise control level of the range extender is improved, and risks are avoided for the entire vehicle.

[0095] It should be understood that although Figure 1 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 1 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0096] like Figure 2 As shown, the present application also provides a range extender noise detection system, the detection system comprising:

[0097] An acquisition module 21 is used to acquire a noise signal at a target position in the range extender and determine an interval time of the noise signal;

[0098] A first determination module 22, configured to determine a noise frequency band of the noise signal, and determine an order of the noise signal according to the interval time;

[0099] A second determination module 23 is used to determine a modulation ratio of a target noise in a target noise frequency band corresponding to the order; the modulation ratio is determined according to a first modulation depth of the target noise, the noise signal includes the target noise, and the noise frequency band includes the target noise frequency band;

[0100] The third determination module 24 is configured to determine that the target noise exceeds a standard in response to the modulation ratio being greater than a preset modulation threshold.

[0101] In one embodiment, the acquisition module 21 is further used for:

[0102] Acquiring vibration information of the target position;

[0103] A noise signal at the target position is acquired according to the vibration information.

[0104] In one embodiment, the first determining module 22 is further configured to:

[0105] Determine initial noise data of the noise signal; the initial noise data includes a frequency bandwidth of the noise signal, and the initial noise data is obtained according to an acoustic sensor;

[0106] According to the frequency bandwidth, the initial noise data is divided into at least two noise frequency bands according to a preset rule.

[0107] In one embodiment, the first determining module 22 is further configured to:

[0108] At least two orders of the noise signal are determined according to the interval time.

[0109] In one embodiment, the second determining module 23 is further configured to:

[0110] determining a noise frequency band corresponding to each of the orders, and determining a first modulation depth of the target noise in the noise frequency band;

[0111] determining a target noise frequency band in the noise frequency band according to the first modulation depth;

[0112] A modulation ratio of the target noise is determined according to the first modulation depth and the target noise frequency band.

[0113] In one embodiment, the second determining module 23 is further configured to:

[0114] determining a sum of the first modulation depths in the target noise frequency band as a first value;

[0115] Determining a sum of second modulation depths in the noise frequency band as a second value;

[0116] The modulation ratio of the target noise is determined according to the ratio of the first value to the second value.

[0117] For the system embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The system embodiment described above is only illustrative, wherein the units described as separate components may or may not be physically separated, and the components as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present application solution.

[0118] Figure 3 This is a schematic diagram of the structure of an electronic device shown in an example embodiment of the present application, the electronic device includes a memory, a processor, and a computer program stored in the memory and used to run on the processor, and the processor implements the detection method described in any of the above embodiments when executing the computer program. Figure 3 The electronic device 30 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0119] like Figure 3 As shown, the electronic device 30 may be in the form of a general-purpose computing device, for example, it may be a server device. The components of the electronic device 30 may include, but are not limited to: at least one processor 31, at least one memory 32, and a bus 33 connecting different system components (including the memory 32 and the processor 31).

[0120] The bus 33 includes a data bus, an address bus, and a control bus.

[0121] The memory 32 may include a volatile memory, such as a random access memory (RAM) 321 and / or a cache memory 322 , and may further include a read-only memory (ROM) 323 .

[0122] The memory 32 may also include a program tool 325 (or utility) having a set (at least one) of program modules 324, such program modules 324 including but not limited to: an operating system, one or more application programs, other program modules and program data, each of which or some combination may include an implementation of a network environment.

[0123] The processor 31 executes various functional applications and data processing by running the computer program stored in the memory 32, such as the detection method provided in any of the above embodiments.

[0124] The electronic device 30 may also communicate with one or more external devices 34 (e.g., keyboards, pointing devices, etc.). Such communication may be performed via an input / output (I / O) interface 35. Furthermore, the electronic device 30 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 36. As shown, the network adapter 36 communicates with other modules of the electronic device 30 via a bus 33. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 30, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.

[0125] It should be noted that although several units / modules or sub-units / modules of the electronic device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided into multiple units / modules to be embodied.

[0126] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the detection method provided in any of the above embodiments is implemented.

[0127] The readable storage medium may include but is not limited to: a portable disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical storage device, a magnetic storage device or any suitable combination of the above.

[0128] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0129] An embodiment of the present application also provides a computer program product, including a computer program, which implements any of the above-mentioned detection methods when executed by a processor.

[0130] Among them, the program code for executing the computer program product of the present application can be written in any combination of one or more programming languages, and the program code can be executed completely on the user device, partially on the user device, as an independent software package, partially on the user device and partially on a remote device, or completely on the remote device.

[0131] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0132] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A method for detecting range extender noise, characterized in that: The detection method comprises: Acquiring a noise signal at a target position in the range extender and determining an interval time of the noise signal; Determine a noise frequency band of the noise signal, and determine an order of the noise signal according to the interval time; Determine a modulation ratio of a target noise in a target noise frequency band corresponding to the order; the modulation ratio is determined according to a first modulation depth of the target noise, the noise signal includes the target noise, and the noise frequency band includes the target noise frequency band; In response to the modulation ratio being greater than a preset modulation threshold, it is determined that the target noise exceeds a standard.

2. The detection method according to claim 1, characterized in that The obtaining of the noise signal at the target position in the range extender comprises: Acquiring vibration information of the target position; A noise signal at the target position is acquired according to the vibration information.

3. The detection method according to claim 1, characterized in that The determining of the noise frequency band of the noise signal comprises: Determine initial noise data of the noise signal; the initial noise data includes a frequency bandwidth of the noise signal, and the initial noise data is obtained according to an acoustic sensor; According to the frequency bandwidth, the initial noise data is divided into at least two noise frequency bands according to a preset rule.

4. The detection method according to any one of claims 1 to 3, characterized in that: The step of determining the order of the noise signal according to the interval time comprises: At least two orders of the noise signal are determined according to the interval time.

5. The detection method according to claim 4, characterized in that: The determining of the modulation ratio of the target noise in the target noise frequency band corresponding to the order includes: determining a noise frequency band corresponding to each of the orders, and determining a first modulation depth of the target noise in the noise frequency band; determining a target noise frequency band in the noise frequency band according to the first modulation depth; A modulation ratio of the target noise is determined according to the first modulation depth and the target noise frequency band.

6. The detection method according to claim 5, characterized in that The step of determining the modulation ratio of the target noise according to the first modulation depth and the target noise frequency band includes: determining a sum of the first modulation depths in the target noise frequency band as a first value; Determining a sum of second modulation depths in the noise frequency band as a second value; The modulation ratio of the target noise is determined according to the ratio of the first value to the second value.

7. A range extender noise detection system, characterized in that: The detection system comprises: An acquisition module, used for acquiring a noise signal at a target position in the range extender and determining an interval time of the noise signal; A first determination module, used to determine a noise frequency band of the noise signal, and determine an order of the noise signal according to the interval time; A second determination module is used to determine a modulation ratio of a target noise in a target noise frequency band corresponding to the order; the modulation ratio is determined according to a first modulation depth of the target noise, the noise signal includes the target noise, and the noise frequency band includes the target noise frequency band; The third determination module is used to determine that the target noise exceeds the standard in response to the modulation ratio being greater than a preset modulation threshold.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and used to run on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 6 is implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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