Vibration abnormal sound source determination method and determination device

Abstract

The present application discloses a method and device for determining a vibration abnormal sound source, the method comprising: evenly arranging N groups of detection sensor groups along the same center point, and evenly arranging M sub-sensors in each detection sensor group along the same straight line at equal intervals, M being a natural number ≥ 3; obtaining the first vibration parameter information detected by each sub-sensor at the first detection position; determining the start-up timing of the M sub-sensors in the same detection sensor group according to the first vibration parameter information, and obtaining the first start-up timing diagram of each detection sensor group; determining the first navigation path where the abnormal sound source to be measured is located according to the first start-up timing diagram. The first navigation path where the abnormal sound source is located is determined by combining the first start-up timing diagram with the three-point start-up priority judgment method and the path judgment principle; and then using the same method to determine the second navigation path where the abnormal sound source is located at the second detection position. The vibration abnormal sound source with an unknown position can be accurately located by crossing the first navigation path and the second navigation path.

Description

Technical Field

[0001] The present disclosure generally relates to the field of vibration source identification technology, and more particularly to a vibration abnormal sound source determination method and determination device. Background Art

[0002] In the automotive industry, how to identify the source of vibration and noise of unknown location on solid-state components is a very difficult technical problem. The current common practice is to use the following methods:

[0003] 1) ABA (part A, part B) interchange of parts. The advantage is that it is highly practical and easy to operate, but the disadvantage is that it can only be identified at the component level.

[0004] 2) Subjective judgment by human physiological organs, such as ear auscultation, body contact perception and eye observation, etc. The advantages are simple and economical methods, but the recognition accuracy is too low and the recognition range is narrow.

[0005] 3) Through auxiliary tools, such as listening equipment or sound imaging systems, etc. The advantage is that the recognition accuracy can be improved to a limited extent, but the disadvantage is that the recognition ability is still limited.

[0006] 4) Determine by combining the measurement of vibration source with NVH (Noise, Vibration and Harshness) (such as using the relevant theoretical analysis of LMS equipment vibration signals for spectrum analysis and cross-correlation analysis). The advantage is that the accuracy of the above methods is improved, but the disadvantage is that it requires high engineering capabilities of measurement personnel and measurement capabilities of measurement equipment, and there is no unified and effective method for promotion in the industry. Summary of the invention

[0007] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a method and device for measuring the source of abnormal vibration sound.

[0008] In a first aspect, a method for determining a vibration abnormal sound source is provided, comprising:

[0009] N detection sensor groups are arranged on the detection plane, the N detection sensor groups are evenly distributed along the same center point, each detection sensor group includes M sub-sensors, the M sub-sensors are evenly and equidistantly distributed along the same straight line, N is a natural number ≥1, and M is a natural number ≥3;

[0010] Acquire first vibration parameter information detected by each sub-sensor at a first detection position on the plane to be measured;

[0011] Determine the vibration start timing of M sub-sensors in the same detection sensor group at the first detection position according to the first vibration parameter information, and obtain a first vibration start timing diagram of each detection sensor group;

[0012] A first navigation path where the abnormal sound source to be detected on the detection plane is located is determined according to the first oscillation timing diagram.

[0013] In a second aspect, a vibration abnormal sound source measuring device is provided, comprising:

[0014] N groups of detection sensor groups, data acquisition equipment and test analysis equipment are arranged on the detection plane; wherein the N groups of detection sensor groups are evenly distributed along the same center point, each detection sensor group comprises M sub-sensors, and the M sub-sensors are evenly and equidistantly distributed along the same straight line, N is a natural number ≥1, and M is a natural number ≥3;

[0015] The signal output terminal of each sub-sensor is electrically connected to the signal input terminal of the data acquisition device respectively;

[0016] The signal output terminal of the data acquisition device is electrically connected to the signal input terminal of the test and analysis device.

[0017] In a third aspect, a terminal device is provided, the device comprising:

[0018] one or more processors;

[0019] a memory for storing one or more programs,

[0020] When one or more programs are executed by one or more processors, the one or more processors execute the vibration and noise source determination method provided by each embodiment of the present invention.

[0021] In a fourth aspect, a computer-readable storage medium storing a computer program is provided, wherein the computer program enables a computer to execute the vibration abnormal sound source determination method provided in accordance with various embodiments of the present invention.

[0022] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0023] By evenly arranging N groups of detection sensor groups along the same center point, and evenly arranging M sub-sensors in each detection sensor group along the same straight line with equal spacing, N is a natural number ≥1, and M is a natural number ≥3; obtaining the first vibration parameter information detected by each sub-sensor at the first detection position; determining the vibration timing of the M sub-sensors in the same detection sensor group according to the first vibration parameter information, and obtaining the first vibration timing diagram of each detection sensor group; determining the first navigation path where the abnormal sound source to be detected is located according to the first vibration timing diagram. The first navigation path where the abnormal sound source is located is determined by combining the first vibration timing diagram with the three-point vibration priority judgment method and the path judgment principle. The same method is then used to determine the second navigation path where the abnormal sound source is located at the second detection position, and the first navigation path and the second navigation path are crossed to accurately locate the vibration abnormal sound source with an unknown position.

[0024] Further, according to some embodiments of the present application, a hyperbola is used as a boundary to determine the navigation path where the vibration abnormal sound source is located. Further, according to some embodiments of the present application, two straight lines are used as boundaries to determine the navigation path where the vibration abnormal sound source is located, which can avoid the disadvantage that the hyperbola navigation path diverges at the far end. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 A flowchart of a method for determining a source of abnormal vibration sound provided in an embodiment of the present application;

[0027] Figure 2 A plane rectangular coordinate system XOY diagram established for the embodiment of the present application;

[0028] Figure 3 A first pair of hyperbolas established with the positions of the sub-sensors P1 and P2 as foci provided in an embodiment of the present application;

[0029] Figure 4 A second pair of hyperbolas established with the positions of the sub-sensors P2 and P3 as foci provided in an embodiment of the present application;

[0030] Figure 5 A third pair of hyperbolas established with the positions of the sub-sensors P1 and P3 as foci provided in an embodiment of the present application;

[0031] Figure 6 Three pairs of hyperbolic combination graphs provided for the embodiments of the present application;

[0032] Figure 7 A simplified hyperbolic boundary navigation path diagram provided in an embodiment of the present application;

[0033] Figure 8 A straight line symmetry line boundary type navigation path map provided in an embodiment of the present application;

[0034] Fig. 9 A flowchart of another preferred implementation of the method for determining the source of abnormal vibration sound provided in an embodiment of the present application;

[0035] Fig.10 A diagram of a three-point sensor combination in a broken line and equal spacing pattern provided in an embodiment of the present application;

[0036] Fig.11 A diagram showing a method of using the circular array vibration path detector provided in an embodiment of the present application;

[0037] Fig.12 A structural diagram of a circular array vibration path detector provided in an embodiment of the present application;

[0038] Fig.13 A timing diagram of the oscillation of three sub-sensors in the same detection sensor group provided in an embodiment of the present application;

[0039] Fig.14 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] Please refer to Figure 1 , shows an exemplary flow chart of a method for determining a source of abnormal vibration sound provided in an embodiment of the present application.

[0043] like Figure 1 As shown, in this embodiment, the method for determining the source of abnormal vibration sound provided by the present invention includes:

[0044] S10: N detection sensor groups are arranged on the detection plane, the N detection sensor groups are evenly distributed along the same center point, each detection sensor group includes M sub-sensors, the M sub-sensors are evenly and equidistantly distributed along the same straight line, N is a natural number ≥1, and M is a natural number ≥3;

[0045] S20: Acquire first vibration parameter information detected by each sub-sensor at a first detection position on the plane to be measured;

[0046] S30: determining the vibration start timing of M sub-sensors in the same detection sensor group at the first detection position according to the first vibration parameter information, and obtaining a first vibration start timing diagram of each detection sensor group;

[0047] S40: Determine a first navigation path where the abnormal sound source to be detected on the detection plane is located according to the first oscillation timing diagram.

[0048] Specifically, abnormal noise is an abnormal sound caused by external excitation on the whole vehicle. This sound usually leads to customer complaints and is often accompanied by local vibration. In the embodiment of the present application, the source of the vibration abnormal noise with unknown location can be preliminarily determined by the three-point vibration priority judgment method and the path judgment principle combined with the first vibration timing diagram.

[0049] In step S20, specifically, the first vibration parameter information is the starting time of the vibration wave of the abnormal sound source on the plane to be measured reaching the sub-sensor. The sensor is a detection device used to collect physical parameters in physical experiments, and can usually convert the measured information into electrical signals or other forms of information output according to a certain rule. The types of sub-sensors include at least one of the following: acceleration sensor, force sensor. Taking the acceleration sensor as an example, the starting time of the vibration wave of the abnormal sound source on the plane to be measured reaching the acceleration sensor is determined by the starting time of the acceleration information detected by the acceleration sensor on the plane to be measured. Among them, acceleration is a vector physical quantity that measures the degree of vibration of an object, with the same direction as the resultant external force, usually the ratio of the change in velocity to the time required for this change to occur. It should be noted that the type of sub-sensor can also use sensors with other parameters.

[0050] In step S30, specifically, the first oscillation timing diagram of the same detection sensor group includes the oscillation sequence of M sub-sensors, and N detection sensor groups can simultaneously obtain N pairs of first oscillation timing diagrams. For example, N detection sensor groups can be evenly arranged on the same plane along a circle with a radius of R to obtain a circular array vibration path detector, and N pairs of oscillation timing diagrams can be obtained by performing one measurement, which reduces the test workload, has high measurement efficiency, and is convenient and fast.

[0051] Step S40 is specifically as follows: from the first start-up sequence diagram, a detection sensor group whose difference between the start-up timings of M sub-sensors in the same detection sensor group is less than a preset threshold is selected, and the target strip path corresponding to the detection sensor group is used as the first navigation path where the abnormal sound source to be detected is located.

[0052] Specifically, in the present application, the distance from the vibration wave of the abnormal sound source on the plane to be measured to the sub-sensor is characterized by the starting time of the vibration wave of the abnormal sound source to reach the sub-sensor. When the difference between the starting time sequence of any two sub-sensors and the abnormal sound source to be measured in the same detection sensor group is greater than the preset threshold, the starting sequence of the M sub-sensors in the detection sensor group can be clearly identified; otherwise, when the difference between the starting time sequence of any two sub-sensors and the abnormal sound source to be measured in the same detection sensor group is less than the preset threshold, the starting sequence of the M sub-sensors in the detection sensor group cannot be clearly identified, and this is used as the screening basis to screen out the detection sensor group from the N pairs of first starting time sequence diagrams. The theoretical basis for such screening is as follows:

[0053] a) Theoretical assumptions:

[0054] Theoretical assumptions (1): This technical theory assumes that the propagation speed of the vibration source on the plane is uniform in all directions without attenuation.

[0055] Theoretical Assumption (2): This technical theory assumes that on the same vibration transmission medium, the time it takes for the vibration source to reach the sub-sensor depends only on the straight-line distance between the two points and the properties of the transmission medium. Figure 2 On the same vibration transmission medium, if the vibration source can be detected by two sub-sensors P1 / P2 at the same time, the sub-sensor closer to the vibration source will be detected first, and the sub-sensor farther away from the vibration source will be detected later. This is the three-point vibration priority judgment method.

[0056] Theoretical hypothesis (3): If the vibration source can be detected by two sub-sensors P1 / P2 at the same time, but if the difference in the distance from the vibration source to the two sub-sensors is less than a certain value 2a (data a depends on the material structure parameters of the transmission path where the vibration source is located), the time it takes for the vibration source to be transmitted to P1 / P2 is very short, and the capacity limitation of the sub-sensors will make it impossible to identify which sub-sensor has priority in vibrating; on the contrary, if the difference in the distance from the vibration source to the two sub-sensors P1 / P2 is greater than a certain value 2a, the order in which the vibration sources are detected by the sub-sensors can be easily identified.

[0057] b) Coordinate system establishment:

[0058] Three accelerometers P1, P2, and P3 are evenly spaced on a straight line in a two-dimensional plane. The distance between any two adjacent accelerometers is 2c. The middle accelerometer P2 is taken as the coordinate origin O, the straight line where the accelerometers P1, P2, and P3 are located is the X-axis, and the straight line passing through the origin O and perpendicular to the X-axis is the Y-axis. A plane rectangular coordinate system XOY is established (see Figure 2 ). Figure 2In the figure, R1 is the distance from the vibration source S1 to the acceleration sensor P1; R2 is the distance from the vibration source S1 to the acceleration sensor P2; and R3 is the distance from the vibration source S1 to the acceleration sensor P3.

[0059] c) Formula derivation:

[0060] Since the transmission path difference of the vibration wave from the vibration source on the two-dimensional plane to the two acceleration sensors is a fixed difference (such as 2a), its curve on the two-dimensional plane must be a symmetrical hyperbolic combination. The following three pairs of hyperbolas are established in the above plane rectangular coordinate system:

[0061] With the midpoint of the acceleration sensor P1 and the acceleration sensor P2 as the center (-c, 0), with the position of the acceleration sensor P1 and the acceleration sensor P2 as the focus, and the focal length as 2c, the first pair of hyperbolas is established, such as Figure 3 As shown:

[0062]

[0063] With the midpoint of the acceleration sensor P2 and the acceleration sensor P3 as the center (c, 0), with the position of the acceleration sensor P2 and the acceleration sensor P3 as the focus, and the focal length as 2c, a second pair of hyperbolas is established, such as Figure 4 As shown:

[0064]

[0065] With the acceleration sensor P2 as the center (0, 0), the positions of the acceleration sensors P1 and P3 as the focus, and the focal length as 4c, a third pair of hyperbolas is established, such as Figure 5 As shown:

[0066]

[0067] Where a is the real semi-axis length of the hyperbola of adjacent acceleration sensors, representing the half value of the fixed difference of the transmission path;

[0068] c is the hyperbolic semi-focal length of adjacent acceleration sensors, representing the half value of the distance between adjacent acceleration sensors;

[0069] b is the length of the imaginary semi-axis of the hyperbola of the adjacent acceleration sensor,

[0070] b3 is the imaginary semi-axis length of acceleration sensor P1 and acceleration sensor P3,

[0071] Mix the above three pairs of hyperbolas into one graph to obtain a combination graph of three pairs of hyperbolas, such as Figure 6As shown. Let the left and right branches of the first pair of hyperbolas be curves D1 and D2 respectively; let the left and right branches of the second pair of hyperbolas be curves D3 and D4 respectively; let the left and right branches of the third pair of hyperbolas be curves D5 and D6 respectively. Then the three pairs of hyperbolas divide the entire plane into 14 regions, which are as follows:

[0072] Area A1 to the left of curve D1; Area A2 surrounded by curves D1, D2, D5, and D3; Area A3 surrounded by curves D3 and D5; Area A4 surrounded by curves D5, D3, and the Y axis; Area A5 surrounded by curves D3, D5, and D2; Area A6 surrounded by curves D5 and D2; Area A7 surrounded by curves D5, D2, and the Y axis;

[0073] Area B1 to the right of curve D4; area B2 surrounded by curves D4, D2, D6 and D3; area B3 surrounded by curves D2 and D6; area B4 surrounded by curves D6, D2 and the Y axis; area B5 surrounded by curves D3, D6 and D2; area B6 surrounded by curves D6 and D3; area B7 surrounded by curves D6, D3 and the Y axis.

[0074] d) Preliminary derivation of path determination criteria:

[0075] The distances from the vibration source S1 to P1, P2, and P3 are S1P1, S1P2, and S1P3 respectively. Figure 6 When any area is in the navigation path of the vibration source, the following path determination criteria can be used to determine the navigation path of the vibration source. The specific navigation path determination principles are shown in Table 1.

[0076] Table 1 Navigation path determination principles

[0077]

[0078]

[0079] In summary, if the vibration source is in the A1 / A6 / B1 / B6 area, the three-point vibration priority method can clearly identify which of the three accelerometers vibrates first. If the vibration source is in the A2 / A3 / A4 / A5 / A7 / B2 / B3 / B4 / B5 / B7 area, the three-point vibration priority method cannot clearly identify which of the three accelerometers vibrates first.

[0080] e) The path determination criteria are finally determined:

[0081] The clear identification area A6 / B6 in the navigation path is very small and can be almost ignored in actual engineering applications. Therefore, the navigation path can be further simplified (such as Figure 7 ).

[0082] The final determination principle is as follows:

[0083] If the vibration source is on the target strip path formed by A2 / A3 / A4 / A5 / A7 / B2 / B3 / B4 / B5 / B7, and the three accelerometers are divided into groups of two, namely, P1 / P2 sensor group, P1 / P3 sensor group, and P2 / P3 sensor group, then one or more sensor groups will be unable to identify the vibration sequence measured by the three accelerometers.

[0084] The reverse deduction is also valid, that is, if one or more sensor groups cannot identify the vibration sequence measured by the three acceleration sensors, the vibration source must be on the target strip path composed of A2 / A3 / A4 / A5 / A7 / B2 / B3 / B4 / B5 / B7. That is, if the vibration sequence of at least one sensor group among the three acceleration sensors cannot be identified, the target strip path corresponding to the three acceleration sensors is used as the target navigation path where the abnormal sound source to be measured is located.

[0085] Therefore, the simplified path determination principle is shown in Table 2:

[0086] Table 2 Simplified path determination principles

[0087]

[0088] Therefore, combined with the simplified path determination principle above, when N=1, M=3, the method for determining the target strip path corresponding to the detection sensor group is as follows:

[0089] like Figure 6 As shown in FIG. 7, the left and right branches of the first pair of hyperbolas are curves D1 and D2; the left and right branches of the second pair of hyperbolas are curves D3 and D4; the left and right branches of the third pair of hyperbolas are curves D5 and D6. With curve D1 as the first boundary and curve D4 as the second boundary, the entire plane is divided into three parts, namely: the first area to the left of curve D1, the second area between curve D1 and curve D4, and the third area to the right of curve D4; the second area between curve D1 and curve D4 is used as the target strip path corresponding to the detection sensor group.

[0090] Furthermore, when the half value a of the fixed difference of the transmission path is zero (i.e., if the distances from the vibration source to the two sub-sensors are different, no matter how large the difference is, the order of the vibration of the M sub-sensors in the same detection sensor group can be clearly identified), the method for determining the target strip path corresponding to the detection sensor group is as follows:

[0091] like Figure 8As shown, the symmetry line M1 of the acceleration sensors P1 and P2 is used as the first boundary, and the symmetry line M2 of the acceleration sensors P2 and P3 is used as the second boundary, and the entire plane is divided into three parts, namely: the first area to the left of the symmetry line M1, the second area between the symmetry lines M1 and M2, and the third area to the right of the symmetry line M2; the second area between the symmetry lines M1 and M2 is used as the target strip path corresponding to the detection sensor. The second area between the symmetry lines M1 and M2 is an internal area of ​​the parallel line width composed of two straight lines, which is a special case of the navigation path of this application and can also be used in actual engineering.

[0092] For further reference, Fig. 9 FIG. 1 is an exemplary flowchart of another preferred embodiment of the method for determining the source of abnormal vibration sound; after step S40, the method further includes:

[0093] S50: selecting a second detection position on the plane to be measured along the direction of the first navigation path, and obtaining second vibration parameter information detected by each sub-sensor at the second detection position on the plane to be measured, wherein the second detection position is different from the first detection position;

[0094] S60: determining the vibration start-up timing of M sub-sensors in the same detection sensor group at the second detection position according to the second vibration parameter information, and obtaining a second vibration start-up sequence diagram of each detection sensor group;

[0095] S70: determining a second navigation path where the abnormal sound source to be detected on the detection plane is located according to the second oscillation timing diagram;

[0096] S80: Determine a location area of ​​an abnormal sound source to be detected according to the first navigation path and the second navigation path.

[0097] Step S80 specifically includes: taking the intersection and overlap area of ​​the first navigation path and the second navigation path as the location area of ​​the abnormal sound source to be detected.

[0098] In step S10, when N=1, the basic theoretical three-point oscillation priority method and path determination principle proposed in the present application can be applied to the analysis of the same type of problems in the 1-dimensional linear field.

[0099] When N is a natural number ≥2, the N groups of detection sensor groups are evenly distributed along the same center point, which can be divided into the following two cases: when M is an odd number ≥3, the N groups of detection sensor groups share a central sub-sensor on the same plane and are evenly distributed along the central sub-sensor; when M is an even number ≥3, the N groups of detection sensor groups share a central point on the same plane and are evenly distributed along the central point. The basic theoretical three-point oscillation priority method and path determination principle proposed in this application can be applied to the analysis of similar problems in the 2D plane field.

[0100] The N groups of detection sensor groups are evenly distributed along the same center point in at least one of the following ways: the N groups of detection sensor groups are evenly distributed in a circle, a rhombus, or a rectangle along the same center point on the same plane. For example, on the basis of the straight line equal spacing three-point pattern sensor, the position of the middle sensor P2 is kept unchanged, and the two outer sensors are rotated around P2, and both are rotated in the Y-axis direction by an equal angle, forming a three-point sensor combination with a broken line equal spacing pattern, such as Fig.10 As shown. If the broken line angle parameters are properly configured, a unique new search navigation path with one-sided parallelism (convergence) and one-sided divergence can be formed. This navigation path can avoid the disadvantage of hyperbolic navigation path divergence at the far end, further expanding its engineering practicality. Other types of sub-sensor arrangements are not described here one by one, and the principles are basically the same.

[0101] When N is a natural number ≥3, the N groups of detection sensor groups are evenly distributed along the same center point, which can be divided into the following two cases: when M is an odd number ≥3, the N groups of detection sensor groups share a central sub-sensor in three-dimensional space and are evenly distributed along the central sub-sensor; when M is an even number ≥3, the N groups of detection sensor groups share a central point in three-dimensional space and are evenly distributed along the central point. The basic theoretical three-point oscillation priority method and path determination principle proposed in this application can be applied to the analysis of the same type of problems in the field of 3D space.

[0102] An embodiment of the present application also provides a vibration abnormal sound source determination device, comprising: N groups of detection sensor groups, data acquisition equipment and test and analysis equipment arranged on a detection plane; wherein the N groups of detection sensor groups are evenly distributed along the same center point, each detection sensor group comprises M sub-sensors, the M sub-sensors are evenly and equidistantly distributed along the same straight line, N is a natural number ≥1, and M is a natural number ≥3; the signal output end of each sub-sensor is electrically connected to the signal input end of the data acquisition equipment respectively; the signal output end of the data acquisition equipment is electrically connected to the signal input end of the test and analysis equipment.

[0103] Among them, the data acquisition device is used to obtain the first vibration parameter information detected by each sub-sensor at the first detection position of the plane to be tested; the test and analysis device is used to receive the first vibration parameter information, and determine the start-up timing of M sub-sensors in the same detection sensor group at the first detection position according to the first vibration parameter information, and obtain the first start-up timing diagram of each detection sensor group; the test and analysis device is also used to determine the first navigation path where the abnormal sound source to be tested on the detection plane is located according to the first start-up timing diagram.

[0104] Specifically, the data acquisition device can be LMS SCADAS XS, etc., and the test and analysis device can be LMS TEST.LAB installed on a laptop computer. For example, 2N+1 acceleration sensors are prepared, and the 2N acceleration sensors are arranged at equal angles on a circle with a radius of R; and an acceleration sensor of the same model is placed at the center of the circle. The signal output end of each acceleration sensor is electrically connected to the signal input end of the data acquisition device LMS SCADAS XS; the signal output end of the data acquisition device LMS SCADAS XS is electrically connected to the signal input end of the test and analysis device LMS TEST.LAB, and the design of the circular array vibration path detector is completed. The detector is equivalent to integrating N groups of detection sensor groups (each group has 3 acceleration sensors) into a circular sensor array, and completing the traversal of N groups of detection sensors along the circumference at one time. According to the three-point vibration priority judgment method and path judgment criterion derived in the previous article, it is derived on which navigation path the abnormal sound source is located.

[0105] Furthermore, the data acquisition device is also used to select a second detection position on the plane to be measured along the direction of the first navigation path, and obtain the second vibration parameter information detected by each sub-sensor at the second detection position on the plane to be measured, and the second detection position is different from the first detection position. The test and analysis device is also used to receive the second vibration parameter information, and determine the start-up timing of the M sub-sensors in the same detection sensor group at the second detection position according to the second vibration parameter information, and obtain the second start-up sequence diagram of each detection sensor group. The test and analysis device is also used to determine the second navigation path where the abnormal sound source to be measured on the detection plane is located according to the second start-up timing diagram. The test and analysis device is also used to determine the location area of ​​the abnormal sound source to be measured according to the first navigation path and the second navigation path.

[0106] As reference Fig.11 The method of using the circular array vibration path detector is to place the designed circular array vibration path detector at any position point (Position-A) on the two-dimensional plane, and combine it with the simplified path determination principle mentioned above to obtain the first navigation path Belt1 where the vibration abnormal sound source is located; then move the circular array vibration path detector to another different position (Position-B), and also combine it with the simplified path determination principle mentioned above to obtain the second navigation path Belt2 where the vibration abnormal sound source is located. The cross-overlapping area of ​​the first navigation path Belt1 and the second navigation path Belt2 is used as the location area of ​​the vibration abnormal sound source.

[0107] The following is a specific example to illustrate the vibration abnormal sound source determination method of the present application, which is as follows:

[0108] S10: Fig.12 As shown in the figure, 12 accelerometer sensors are arranged at equal angles on a circle with a radius of R; then an accelerometer sensor is placed at the center of the circle, and the signal output end of each accelerometer sensor is electrically connected to the signal input end of the data acquisition device LMS SCADAS XS; the signal output end of the data acquisition device LMS SCADAS XS is electrically connected to the signal input end of the test and analysis equipment LMS TEST.LAB, and the design of the circular array vibration path detector is completed.

[0109] S20: Acquire acceleration information that changes with time and is detected by each acceleration sensor at a first detection position on the plane to be measured.

[0110] S30: Determine the start-up timing of the three acceleration sensors in the same detection sensor group at the first detection position according to the acceleration information changing with time obtained by each acceleration sensor, and obtain 6 sets of start-up timing diagrams, namely P1 / P2 / P3, P8 / P2 / P13, P7 / P2 / P12, P6 / P2 / P11, P5 / P2 / P10, and P4 / P2 / P9.

[0111] S40: Reference Fig.13 First, analyze and compare the vibration sequence of the detection sensor group P1 / P2 / P3. If the vibration sequence between the three points is very clear, it means that the vibration source is not on the navigation path 03 corresponding to the detection sensor group. This navigation path can be excluded. Fig.13 The three-point vibration sequence diagram shown in the figure, where the horizontal axis is time, the unit is s; the vertical axis is acceleration, the unit is g. Fig.13 It can be seen that the middle sensor P2 starts to vibrate first, the left sensor P1 starts to vibrate second, and the right sensor P3 starts to vibrate last.

[0112] By analogy, all detection sensor groups whose vibration start sequence can be identified are eliminated one by one until a detection sensor group whose vibration start sequence cannot be identified is screened out. For example, a detection sensor group P7 / P2 / P12 whose vibration start sequence cannot be identified is finally screened out, then the source of the abnormal vibration sound must be at a certain position of the navigation path 05 corresponding to the detection sensor group P7 / P2 / P12.

[0113] like Fig.14As shown, as another aspect, the present application also provides a terminal device 200, including one or more central processing units (CPU) 201, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 202 or the program loaded from the storage part 208 to the random access memory (RAM) 203. In the RAM 203, various programs and data required for the operation of the terminal device 200 are also stored. The CPU 201, the ROM 202, and the RAM 203 are connected to each other through a bus 204. An input / output (I / O) interface 205 is also connected to the bus 204.

[0114] The following components are connected to the I / O interface 205: an input section 206 including a keyboard, a mouse, etc.; an output section 207 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 208 including a hard disk, etc.; and a communication section 209 including a network interface card such as a LAN card, a modem, etc. The communication section 209 performs communication processing via a network such as the Internet. A drive 210 is also connected to the I / O interface 205 as needed. A removable medium 211, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 210 as needed, so that a computer program read therefrom is installed into the storage section 208 as needed.

[0115] In particular, according to the embodiments of the present disclosure, the above reference Figure 1 The described process may be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product including a computer program tangibly contained on a machine-readable medium, the computer program including program code for executing the vibration noise source determination method. In such an embodiment, the computer program may be downloaded and installed from a network via the communication portion 209 and / or installed from the removable medium 211.

[0116] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, program segment or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a different order from the order marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0117] As another aspect, the present application also provides a computer-readable storage medium, which may be a computer-readable storage medium included in the device described in the above embodiment; or a computer-readable storage medium that exists independently and is not assembled into the device. The computer-readable storage medium stores one or more programs, and the programs are used by one or more processors to execute the vibration abnormal sound source determination method described in the present application.

[0118] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be realized by a dedicated hardware-based system that performs a specified function or operation, or can be realized by a combination of dedicated hardware and computer instructions.

[0119] The units or modules involved in the embodiments described in the present application may be implemented by software or by hardware. The units or modules described may also be arranged in a processor. For example, each of the units may be a software program arranged in a computer or a mobile smart device, or may be a separately configured hardware device. The names of these units or modules do not, in some cases, constitute limitations on the units or modules themselves.

[0120] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A method for determining the source of abnormal vibration sound, characterized in that: include: Set up in the detection plane Group detection sensor group, The detection sensor groups are evenly distributed along the same center point, and each detection sensor group includes Sub-sensors, The sub-sensors are evenly and equidistantly distributed along the same straight line. is a natural number ≥ 1, is a natural number ≥ 3; Acquire first vibration parameter information detected by each sub-sensor at a first detection position on the plane to be measured; Determine the number of sensors in the same detection sensor group according to the first vibration parameter information The oscillation timing of each sub-sensor at the first detection position is obtained to obtain a first oscillation timing diagram of each detection sensor group; Determining a first navigation path where the abnormal sound source to be detected on the detection plane is located according to the first oscillation timing diagram is specifically: selecting from the first oscillation timing diagram the first navigation path of the abnormal sound source to be detected on the detection plane; A detection sensor group whose difference between the start-up timings of the sub-sensors is less than a preset threshold value, and the target strip path corresponding to the detection sensor group is used as the first navigation path where the abnormal sound source to be detected is located; when When the detection sensor group corresponds to the target strip path, the method for determining the target strip path includes: Three sub-sensors are arranged along the same straight line on the detection plane, namely, sub-sensors P1, P2 and P3; the straight line where the three sub-sensors are located is taken as the X-axis, the midpoint of the three sub-sensors, namely, sub-sensor P2, is taken as the origin O, and the straight line passing through the origin O and perpendicular to the X-axis is taken as the Y-axis, and a plane rectangular coordinate system XOY is established; With the midpoint of sub-sensor P1 and sub-sensor P2 as the center and the position of sub-sensor P1 and sub-sensor P2 as the focus, the first pair of hyperbolas is established: With the midpoint of sub-sensor P2 and sub-sensor P3 as the center and the position of sub-sensor P2 and sub-sensor P3 as the focus, a second pair of hyperbolas is established: With sub-sensor P2 as the center and the positions of sub-sensors P1 and P3 as the foci, a third pair of hyperbolas is established: in, is the real semi-axis length of the hyperbola of adjacent sub-sensors, representing the half value of the fixed difference of the transfer path; is the hyperbolic half focal length of adjacent sub-sensors, representing the half value of the distance between adjacent sub-sensors; is the length of the imaginary semi-axis of the hyperbola of the adjacent sub-sensor, ; is the imaginary semi-axis length of sub-sensor P1 and sub-sensor P3, ; The left and right branches of the first pair of hyperbolas are curves D1 and D2 respectively; the left and right branches of the second pair of hyperbolas are curves D3 and D4 respectively; the left and right branches of the third pair of hyperbolas are curves D5 and D6 respectively; With curve D1 as the first boundary and curve D4 as the second boundary, the entire plane is divided into three parts, namely: the first area to the left of curve D1, the second area between curve D1 and curve D4, and the third area to the right of curve D4; the second area between curve D1 and curve D4 is used as the target strip path corresponding to the detection sensor group.

2. The method for determining the source of abnormal vibration sound according to claim 1, characterized in that: When the transfer path is fixed at half the difference When is zero, the method for determining the target strip path corresponding to the detection sensor group comprises the following sub-steps: Three sub-sensors are arranged along the same straight line on the detection plane, namely sub-sensors P1, P2 and P3. The symmetry line M1 of the sub-sensors P1 and P2 is used as the first boundary line, and the symmetry line M2 of the sub-sensors P2 and P3 is used as the second boundary line. The whole plane is divided into three parts, namely: a first area to the left of the symmetry line M1, a second area between the symmetry line M1 and the symmetry line M2, and a third area to the right of the symmetry line M2; the second area between the symmetry line M1 and the symmetry line M2 is used as the target strip path corresponding to the detection sensor group.

3. The method for determining the source of abnormal vibration sound according to any one of claims 1 to 2, characterized in that: After determining the first navigation path where the abnormal sound source to be detected on the detection plane is located according to the first oscillation timing diagram, the method further includes: Selecting a second detection position on the plane to be measured along the direction of the first navigation path, and acquiring second vibration parameter information detected by each sub-sensor at the second detection position on the plane to be measured, wherein the second detection position is different from the first detection position; Determine the number of the same detection sensor group according to the second vibration parameter information The oscillation timing diagram of each detection sensor group is obtained by oscillating the sub-sensors at the second detection position; Determine a second navigation path where the abnormal sound source to be detected on the detection plane is located according to the second oscillation timing diagram; The location area of ​​the abnormal sound source to be detected is determined according to the first navigation path and the second navigation path.

4. The method for determining the source of abnormal vibration sound according to claim 3, characterized in that: The method of determining the location area of ​​the abnormal sound source to be detected according to the first navigation path and the second navigation path is specifically: An overlapping area between the first navigation path and the second navigation path is used as a location area of ​​an abnormal sound source to be detected.

5. The method for determining the source of abnormal vibration sound according to claim 1, characterized in that: The sub-sensors include at least one of the following types: an acceleration sensor and a force sensor.

6. The method for determining the source of abnormal vibration sound according to claim 1, characterized in that: when When is a natural number ≥ 2, The detection sensor group is evenly distributed along the same center point and can be divided into the following two situations: when When is an odd number ≥ 3, The detection sensor groups share a central sub-sensor in the same plane and are evenly distributed along the central sub-sensor; when When is an even number ≥3, The detection sensor groups share a center point in the same plane and are evenly distributed along the center point.

7. The method for determining the source of abnormal vibration noise according to claim 6, characterized in that: The detection sensor groups are evenly distributed along the same center point in at least one of the following ways: The detection sensor groups are evenly distributed in a circle, a diamond or a rectangle along the same center point on the same plane.

8. The method for determining the source of abnormal vibration noise according to claim 1, characterized in that: when When is a natural number ≥3, The detection sensor group is evenly distributed along the same center point and can be divided into the following two situations: when When is an odd number ≥ 3, The detection sensor group shares a sub-sensor at the center in the three-dimensional space, and the sub-sensors along the center are evenly distributed; when When is an even number ≥3, The detection sensor group shares a center point in three-dimensional space and is evenly distributed along the center point.

9. A vibration abnormal sound source measuring device, characterized in that: The device is used to perform the vibration abnormal sound source determination method according to any one of claims 1 to 8, and the device comprises: a detection plane arranged on the detection plane A detection sensor group, data acquisition equipment and test analysis equipment; wherein, The detection sensor groups are evenly distributed along the same center point, and each detection sensor group includes Sub-sensors, The sub-sensors are evenly and equidistantly distributed along the same straight line. is a natural number ≥ 1, is a natural number ≥ 3; The signal output terminal of each sub-sensor is electrically connected to the signal input terminal of the data acquisition device respectively; The signal output terminal of the data acquisition device is electrically connected to the signal input terminal of the test and analysis device; The data acquisition device is used to obtain first vibration parameter information detected by each sub-sensor at a first detection position on the plane to be measured; The testing and analyzing device is used to receive the first vibration parameter information and determine the first vibration parameter information of the same detection sensor group. The oscillation timing of each sub-sensor at the first detection position is obtained to obtain a first oscillation timing diagram of each detection sensor group; The testing and analyzing device is further used to determine a first navigation path where the abnormal sound source to be tested on the detection plane is located according to the first oscillation timing diagram.

10. The device for measuring abnormal vibration noise source according to claim 9, characterized in that: The data acquisition device is further used to select a second detection position on the plane to be measured along the direction of the first navigation path, and obtain second vibration parameter information detected by each sub-sensor at the second detection position on the plane to be measured, where the second detection position is different from the first detection position; The testing and analyzing device is also used to receive the second vibration parameter information and determine the number of the detection sensors in the same detection sensor group according to the second vibration parameter information. The oscillation timing diagram of each detection sensor group is obtained by oscillating the sub-sensors at the second detection position; The test and analysis device is further used to determine a second navigation path where the abnormal sound source to be tested on the detection plane is located according to the second oscillation timing diagram; The testing and analyzing device is further used to determine a location area of ​​an abnormal sound source to be tested according to the first navigation path and the second navigation path.

11. The device for measuring the source of abnormal vibration sound according to any one of claims 9 to 10, characterized in that: The sub-sensors include at least one of the following types: an acceleration sensor and a force sensor.

12. The device for measuring abnormal vibration noise source according to claim 9, characterized in that: when When is a natural number ≥ 2, The detection sensor group is evenly distributed along the same center point and can be divided into the following two situations: when When is an odd number ≥ 3, The detection sensor groups share a central sub-sensor in the same plane and are evenly distributed along the central sub-sensor; when When is an even number ≥3, The detection sensor groups share a center point in the same plane and are evenly distributed along the center point.

13. The device for measuring the source of abnormal vibration sound according to claim 12, characterized in that: The detection sensor groups are evenly distributed along the same center point in at least one of the following ways: The detection sensor groups are evenly distributed in a circle, a diamond or a rectangle along the same center point on the same plane.

14. The device for measuring the source of abnormal vibration noise according to claim 9, characterized in that: when When is a natural number ≥3, The detection sensor group is evenly distributed along the same center point and can be divided into the following two situations: when When is an odd number ≥ 3, The detection sensor group shares a sub-sensor at the center in the three-dimensional space, and the sub-sensors along the center are evenly distributed; when When is an even number ≥3, The detection sensor group shares a center point in three-dimensional space and is evenly distributed along the center point.

15. A terminal device, characterized in that: The terminal device comprises: one or more processors; a memory for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors execute the vibration noise source determination method according to any one of claims 1 to 8.

16. A computer-readable storage medium storing a computer program, characterized in that: When the program is executed by a processor, the method for determining the source of abnormal vibration sound as described in any one of claims 1 to 8 is implemented.

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