CN115876482B - Method and device for measuring abnormal vibration sound source - Google Patents
Method and device for measuring abnormal vibration sound source Download PDFInfo
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- CN115876482B CN115876482B CN202111139475.5A CN202111139475A CN115876482B CN 115876482 B CN115876482 B CN 115876482B CN 202111139475 A CN202111139475 A CN 202111139475A CN 115876482 B CN115876482 B CN 115876482B
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Abstract
The application discloses a method and a device for measuring a vibration abnormal sound source, wherein the method comprises the steps of uniformly arranging N groups of detection sensor groups along the same center point, uniformly and equidistantly arranging M sub-sensors in each detection sensor group along the same straight line, wherein M is a natural number more than or equal to 3; the method comprises the steps of obtaining first vibration parameter information detected by each sub-sensor at a first detection position, determining the starting time sequence of M sub-sensors in the same detection sensor group according to the first vibration parameter information to obtain a first starting time sequence diagram of each detection sensor group, and determining a first navigation path where an abnormal sound source to be detected is located according to the first starting time sequence diagram. Determining a first navigation path of the abnormal sound source by combining a three-point vibration starting priority order discrimination method and a path discrimination principle and a first vibration starting time sequence diagram, determining a second navigation path of the abnormal sound source at a second detection position by adopting the same method, and accurately positioning the vibration abnormal sound source with unknown position by crossing the first navigation path and the second navigation path.
Description
Technical Field
The present disclosure relates generally to the field of vibration source identification technologies, and in particular, to a method and an apparatus for measuring a vibration abnormal sound source.
Background
In the automotive industry, how to identify vibration abnormal sound sources with unknown positions on solid-state components is a very troublesome technical problem. Current practice is to do this by the following method:
1) The parts are exchanged by ABA (switching back and forth between parts A and B). The method has the advantages of high practicability and easy operation, and has the defect that only the part level can be identified.
2) Subjective judgment is carried out on physiological organs of the human body, such as ear auscultation, limb contact sensing, eye observation and the like. The method has the advantages of simplicity, economy and money saving, but the recognition accuracy is too low, and the recognition range is narrow.
3) By means of auxiliary tools such as listening devices or sound imaging systems etc. The method has the advantages of improving the recognition accuracy in a limited way and still has the disadvantage of limited recognition capability.
4) Judgment is performed by means of measuring Vibration sources in combination with NVH (Noise, vibration and HARSHNESS acoustic roughness) (such as correlation theory analysis of Vibration signals of LMS equipment is used for performing cross-correlation analysis such as frequency spectrum analysis and the like). The method has the advantages that the precision of the means is improved, the engineering capacity of measuring staff and the measuring capacity of measuring equipment are required to be high, and the industry does not have a unified and effective method to popularize.
Disclosure of Invention
In view of the above-described drawbacks and shortcomings of the related art, it is desirable to provide a vibration abnormal sound source measuring method and measuring apparatus.
In a first aspect, a method for measuring a vibration abnormal sound source is provided, including:
Setting N groups of detection sensor groups on a detection plane, wherein the N groups of detection sensor groups are uniformly distributed along the same center point, each detection sensor group comprises M sub-sensors, the M sub-sensors are uniformly distributed at equal intervals along the same straight line, N is a natural number more than or equal to 1, and M is a natural number more than or equal to 3;
Acquiring first vibration parameter information detected by each sub-sensor at a first detection position of a plane to be detected;
Determining the starting vibration time sequence of M sub-sensors in the same detection sensor group at a first detection position according to the first vibration parameter information to obtain a first starting vibration time sequence diagram of each detection sensor group;
And determining a first navigation path of the abnormal sound source to be detected on the detection plane according to the first resonance time sequence diagram.
In a second aspect, there is provided a vibration abnormal sound source measuring apparatus including:
the detection system comprises N groups of detection sensor groups, data acquisition equipment and test analysis equipment, wherein the N groups of detection sensor groups are uniformly distributed along the same center point, each detection sensor group comprises M sub-sensors, the M sub-sensors are uniformly distributed at equal intervals along the same straight line, N is a natural number more than or equal to 1, and M is a natural number more than or equal to 3;
the signal output end of each sub-sensor is electrically connected with the signal input end of the data acquisition equipment respectively;
And the signal output end of the data acquisition equipment is electrically connected with the signal input end of the test analysis equipment.
In a third aspect, there is provided a terminal device, the device comprising:
One or more processors;
a memory for storing one or more programs,
The one or more programs, when executed by the one or more processors, cause the one or more processors to perform the vibration abnormal sound source measurement method provided according to the embodiments of the present invention.
In a fourth aspect, a computer-readable storage medium storing a computer program for causing a computer to execute the vibration abnormal sound source measuring method provided according to the embodiments of the present invention is provided.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:
The method comprises the steps of uniformly arranging N groups of detection sensor groups along the same center point, uniformly and equidistantly arranging M sub-sensors in each detection sensor group along the same straight line, wherein N is a natural number which is more than or equal to 1, M is a natural number which is more than or equal to 3, acquiring first vibration parameter information detected by each sub-sensor at a first detection position, determining the vibration starting time sequence of the M sub-sensors in the same detection sensor group according to the first vibration parameter information, obtaining a first vibration starting time sequence diagram of each detection sensor group, and determining a first navigation path where an abnormal sound source to be detected is located according to the first vibration starting time sequence diagram. And determining a first navigation path where the abnormal sound source is located by combining a three-point vibration starting priority order discrimination method and a path discrimination principle with the first vibration starting time sequence diagram. And then determining a second navigation path where the abnormal sound source is located at the second detection position by adopting the same method, and crossing the first navigation path and the second navigation path to accurately position the vibration abnormal sound source with unknown position.
Further, in accordance with 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 a navigation path where the vibration abnormal sound source is located, so that the disadvantage that the hyperbolic navigation path diverges at the far end can be avoided.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
FIG. 1 is a flow chart diagram of a method for measuring a vibration abnormal sound source according to an embodiment of the present application;
FIG. 2 is a diagram of a rectangular planar coordinate system XOY established in an embodiment of the present application;
FIG. 3 is a first pair of hyperbolas established by focusing on the position of the sub-sensors P1 and P2 according to an embodiment of the present application;
FIG. 4 is a second pair of hyperbolas established with focus on the position of the sub-sensors P2 and P3 according to an embodiment of the present application;
FIG. 5 is a third pair of hyperbolas established by taking the positions of the sub-sensors P1 and P3 as focuses according to an embodiment of the present application;
FIG. 6 is a combination diagram of three pairs of hyperbolas provided by an embodiment of the application;
FIG. 7 is a simplified hyperbolic boundary navigation path diagram provided by an embodiment of the present application;
FIG. 8 is a linear symmetry line boundary type navigation path diagram provided by an embodiment of the present application;
FIG. 9 is a block flow diagram of another preferred embodiment of a method for measuring a vibration abnormal sound source according to an embodiment of the present application;
FIG. 10 is a diagram of a broken line equally spaced three-point sensor assembly provided in an embodiment of the present application;
FIG. 11 is a diagram illustrating a method of using a circumferential array vibration path probe according to an embodiment of the present application;
FIG. 12 is a diagram of a circumferential array vibration path detector according to an embodiment of the present application;
FIG. 13 is a timing chart of the vibration of three sub-sensors in the same sensor group according to an embodiment of the present application;
Fig. 14 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
Detailed Description
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the application are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1, an exemplary flow chart of a method for measuring a vibration abnormal sound source according to an embodiment of the application is shown.
As shown in fig. 1, in this embodiment, the method for measuring a vibration abnormal sound source provided by the present invention includes:
s10, arranging N groups of detection sensor groups on a detection plane, wherein the N groups of detection sensor groups are uniformly distributed along the same center point, each detection sensor group comprises M sub-sensors, the M sub-sensors are uniformly distributed at equal intervals along the same straight line, N is a natural number more than or equal to 1, and M is a natural number more than or equal to 3;
S20, acquiring first vibration parameter information detected by each sub-sensor at a first detection position of a plane to be detected;
S30, determining the starting time sequence of M sub-sensors in the same detection sensor group at a first detection position according to the first vibration parameter information to obtain a first starting time sequence diagram of each detection sensor group;
and S40, determining a first navigation path of the abnormal sound source to be detected on the detection plane according to the first resonance time sequence diagram.
Specifically, the abnormal sound is an abnormal sound on the whole vehicle due to external excitation, and this sound often causes customer complaints, which often occur with the occurrence of local vibrations. In the embodiment of the application, the vibration abnormal sound source with unknown position can be preliminarily determined by combining the three-point vibration starting priority order discrimination method and the path discrimination principle with the first vibration starting time sequence diagram.
In step S20, specifically, the first vibration parameter information is a starting time of the vibration wave of the abnormal sound source on the plane to be measured to reach the sub-sensor. The sensor is a detection device for collecting physical parameters in physical experiments, and can generally convert measured information into electric signals or other forms of information output according to a certain rule. The type of the sub-sensor at least comprises an acceleration sensor and a force sensor. For example, an acceleration sensor is taken as an example, and the starting time of the vibration wave of the abnormal sound source on the plane to be measured reaches the acceleration sensor is determined according to the starting time of the acceleration information detected by the acceleration sensor on the plane to be measured. The acceleration is a vector physical quantity for measuring the vibration degree of an object, and is the same as the direction of the external force, and is generally the ratio of the speed variation quantity and the time required for the variation. It should be noted that the type of the sub-sensor may also be a sensor of other parameters.
In step S30, specifically, the first oscillation starting sequence of M sub-sensors in the first oscillation starting sequence diagram of the same detection sensor group, and N pairs of first oscillation starting sequence diagrams may be acquired by N groups of detection sensor groups simultaneously. If N groups of detection sensor groups can be uniformly arranged on the same plane along the circumference with the radius of R, a circumference array type vibration path detector is obtained, and N pairs of vibration starting time sequence diagrams are obtained by one-time measurement, so that the testing workload is reduced, the measuring efficiency is high, and the method is convenient and quick.
In step S40, a detection sensor group with a difference value between the starting time sequences of M sub-sensors in the same detection sensor group smaller than a preset threshold value is screened from the first starting sequence diagram, and a target strip path corresponding to the detection sensor group is used as a first navigation path where an abnormal sound source to be detected is located.
Specifically, the distance from the vibration wave of the abnormal sound source to the sub-sensor is represented by the starting time of the vibration wave of the abnormal sound source to the sub-sensor on the plane to be measured. If not, if the difference value of the oscillation starting time sequences of any two sub-sensors in the same detection sensor group and the abnormal sound source to be detected is smaller than the preset threshold value, the oscillation starting time sequences of the M sub-sensors in the detection sensor group cannot be clearly identified, and the detection sensor group is screened from the N pairs of first oscillation starting time sequence diagrams based on the screening basis, wherein the theoretical basis of the screening is as follows:
a) Theoretical assumption:
Theoretical assumption (1) the theory of the present technique assumes that the propagation velocity of the vibration source on a plane is uniform and not attenuated.
Theoretical assumption (2) the present technique theory assumes that the time for the vibration source to reach the sub-sensor on the same vibration propagation medium depends only on the straight line distance between two points and the properties of the propagation medium. That is, referring to fig. 2, if the vibration source can be detected by 2 sub-sensors P1/P2 at the same time on the same vibration propagation medium, the sub-sensor closer to the vibration source will be preferentially detected, and the sub-sensor farther from the vibration source will be detected with a hysteresis, which is a three-point vibration initiation priority discrimination method.
The theoretical assumption (3) is that if the vibration source can be detected by 2 sub-sensors P1/P2 at the same time, but if the difference between the distances of the vibration source to the two sub-sensors is smaller than a certain value 2a (data a depends on the material structure parameters of the transmission path of the vibration source), the time of the vibration source to transmit to P1/P2 is very short, the capacity limitation of the sub-sensors will lead to the sub-sensors which cannot identify which point to preferentially start vibrating, otherwise if the difference between the distances of the vibration source to the two sub-sensors P1/P2 is larger than a certain value 2a, the sequence of the detection of the vibration source by the sub-sensors is easy to identify.
B) And (3) establishing a coordinate system:
3 acceleration sensors P1, P2 and P3 are uniformly and equidistantly arranged on a certain straight line of the two-dimensional plane, and the distance between any two adjacent acceleration sensors is 2c. With the intermediate acceleration sensor P2 as the origin O of coordinates, the straight line where the acceleration sensors 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 planar rectangular coordinate system XOY (see fig. 2) is established. In fig. 2, 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.
C) Formula derivation:
since the transmission path difference of the vibration wave of the vibration source to the two acceleration sensors on the two-dimensional plane is a fixed difference (e.g., 2 a), the curves on the two-dimensional plane must be symmetrical hyperbolic curve combinations. And (3) establishing three pairs of hyperbolas in the plane rectangular coordinate system:
A first pair of hyperbolas is established with the midpoints of the acceleration sensor P1 and the acceleration sensor P2 as the center (-c, 0), the positions of the acceleration sensor P1 and the acceleration sensor P2 as the focal points, and the focal length as 2c, as shown in fig. 3:
A second pair of hyperbolas is established with the midpoints of the acceleration sensor P2 and the acceleration sensor P3 as the center (c, 0), the positions of the acceleration sensor P2 and the acceleration sensor P3 as the focus, and the focal length as 2c, as shown in fig. 4:
A third pair of hyperbolas is established with the acceleration sensor P2 as the center (0, 0), the positions of the acceleration sensor P1 and the acceleration sensor P3 as the focal points, and the focal length 4c, as shown in fig. 5:
A is the real half-axis length of the hyperbola of the adjacent acceleration sensor, and represents the half value of the fixed difference value of the transmission path;
c is a hyperbolic half-focal length of the adjacent acceleration sensor, and represents a half value of the distance between the adjacent acceleration sensors;
b is the virtual half-axis length of the hyperbola of the adjacent acceleration sensor,
B 3 is the virtual half-axis length of the acceleration sensor P1 and the acceleration sensor P3,
The three pairs of hyperbolas are mixed into one graph to obtain a three-pair hyperbola combined graph, as shown in fig. 6. The left and right two curves of the first pair of hyperbolas are respectively provided as a curve D 1、D2, the left and right two curves of the second pair of hyperbolas are respectively provided as a curve D 3、D4, and the left and right two curves of the third pair of hyperbolas are respectively provided as a curve D 5、D6. The three pairs of hyperbolas divide the entire plane into 14 regions, as follows:
The curve D 1 is a left A1 area, the curve D 1、D2、D5、D3 is a left A2 area, the curve D 3、D5 is a right A3 area, the curve D 5、D3 is a right A4 area, the curve D 3、D5、D2 is a right A5 area, the curve D 5、D2 is a right A6 area, and the curve D 5、D2 is a right A7 area;
The curve D 4 is a right B1 area, the curve D 4、D2、D6、D3 is a B2 area, the curve D 2、D6 is a B3 area, the curve D 6、D2 is a B4 area, the curve D 3、D6、D2 is a B5 area, the curve D 6、D3 is a B6 area, and the curve D 6、D3 is a B7 area.
D) Preliminary derivation of path decision criteria:
The vibration sources S1 to P1, P2, P3 are separated by S1P1, S1P2, and S1P3, respectively. When the vibration source whose position is unknown is in any one of the areas in fig. 6, determination of the navigation path of the vibration source can be made using the following path determination criteria, the specific navigation path determination criteria being shown in table 1.
TABLE 1 navigation Path decision principle
In summary, if the vibration source is in the A1/A6/B1/B6 area, it can completely and clearly identify who first activates all three acceleration sensors by the three-point activation priority method. If the vibration source is in the A2/A3/A4/A5/A7/B2/B3/B4/B5/B7 area, it is not completely clear who all three acceleration sensors are activated by the three-point activation priority method.
E) The path decision criteria are finally determined:
the clearly identified area A6/B6 in the navigation path is very small and can be almost ignored in practical engineering applications. The navigation path can be further simplified (as in fig. 7).
The decision principle is finally determined as follows:
If the vibration source is on a target strip path formed by A2/A3/A4/A5/A7/B2/B3/B4/B5/B7, dividing three acceleration sensors into two groups, namely a P1/P2 sensor group, a P1/P3 sensor group and a P2/P3 sensor group, the vibration starting sequence measured by the three acceleration sensors must be unidentified by one group or a plurality of groups of sensor groups.
The opposite deduction is also true, namely if the vibration starting sequence measured by the three acceleration sensors is unidentified by one or more groups of sensor groups, the vibration source is necessarily positioned on a target strip path formed by A2/A3/A4/A5/A7/B2/B3/B4/B5/B7. If the starting sequence of at least one group of sensor groups in the three acceleration sensors cannot be identified, the target strip path corresponding to the three acceleration sensors is used as the target navigation path of the abnormal sound source to be detected.
Therefore, the simplified path determination principle is shown in table 2:
table 2 simplified path determination principle
Therefore, in combination with the simplified path determination principle, when n=1 and m=3, the method for determining the target strip path corresponding to the probe group is as follows:
as shown in fig. 6 to 7, the left and right two curves of the first pair of hyperbolas are respectively set to be a curve D 1、D2, the left and right two curves of the second pair of hyperbolas are respectively set to be a curve D 3、D4, and the left and right two curves of the third pair of hyperbolas are respectively set to be a curve D 5、D6. The whole plane is divided into three parts by taking a curve D 1 as a first boundary line and a curve D 4 as a second boundary line, wherein the three parts are respectively a first left area of the curve D 1, a second area between the curve D 1 and the curve D 4, a third right area of the curve D 4 and a target banded path corresponding to a detection sensor group by taking the second area between the curve D 1 and the curve D 4.
Further, when the half value a of the fixed difference of the transmission paths is zero (namely, if the distances between the vibration sources and the two sub-sensors are considered to be different, the starting sequence of the M sub-sensors in the same detection sensor group can be clearly identified no matter how different the distances are), the method for determining the target strip path corresponding to the detection sensor group is as follows:
As shown in fig. 8, the whole plane is divided into three parts, namely, a first area with the symmetry line M 1 at the left, a second area between the symmetry line M 1 and the symmetry line M 2, a third area with the symmetry line M 2 at the right, and a second area between the symmetry line M 1 and the symmetry line M 2 as the target strip path corresponding to the detection sensor, by using the symmetry lines M 1 of the acceleration sensors P1 and P2 as the first boundary and the symmetry line M 2 of the acceleration sensors P2 and P3 as the second boundary. The second area between the symmetry line M 1 and the symmetry line M 2 is an inner area with parallel line width formed by two straight lines, which is a special example of the navigation path of the present application and can be used in practical engineering.
Further, referring to the exemplary flow chart of another preferred embodiment of the method for measuring a vibration abnormal sound source shown in fig. 9, after step S40, the method further comprises:
S50, selecting a second detection position on the plane to be detected along the direction of the first navigation path, and acquiring second vibration parameter information detected by each sub-sensor at the second detection position of the plane to be detected, wherein the second detection position is different from the first detection position;
s60, determining the starting time sequence of M sub-sensors in the same detection sensor group at a second detection position according to the second vibration parameter information to obtain a second starting sequence diagram of each detection sensor group;
S70, determining a second navigation path of the abnormal sound source to be detected on the detection plane according to the second vibration starting time sequence diagram;
and S80, determining the position area of the abnormal sound source to be detected according to the first navigation path and the second navigation path.
The step S80 is specifically that a crossed overlapping area of the first navigation path and the second navigation path is used as a position area of an abnormal sound source to be detected.
In step S10, when n=1, the basic theory three-point oscillation starting priority method and the path determination principle proposed by the present application can be applied to the analysis work of the same type of problem in the 1-dimensional linear field.
When N is a natural number more than or equal to 2, the N groups of detection sensor groups are uniformly distributed along the same center point, wherein when M is an odd number more than or equal to 3, the N groups of detection sensor groups share a central sub-sensor on the same plane and are uniformly distributed along the central sub-sensor, and when M is an even number more than or equal to 3, the N groups of detection sensor groups share a central point on the same plane and are uniformly distributed along the central point. The basic theory three-point vibration starting priority order method and the path judging principle provided by the application can be applied to the analysis work of the same type of problems in the 2-dimensional plane field.
The mode of uniformly distributing the N groups of the detection sensor groups along the same center point at least comprises the following mode that the N groups of the detection sensor groups are uniformly distributed in a round shape, a diamond shape and a rectangle shape along the same center point on the same plane. If the position of the middle sensor P2 is kept unchanged on the basis of the linear equidistant three-point type sensor, the two outer sensors rotate by an equivalent angle in the Y-axis direction by taking the P2 as the center, so that the three-point type sensor with a broken line equidistant pattern is formed, as shown in fig. 10. If the parameters of the broken line angle are properly configured, a unique single-side parallel (convergent) single-side divergent novel search navigation path can be formed. The navigation path can avoid the defect that the hyperbolic navigation path diverges at the far end, and further expands the engineering practicability. Other types of sub-sensor arrangements are not described here, the principle being substantially similar.
When N is a natural number more than or equal to 3, the N groups of detection sensor groups are uniformly distributed along the same center point, wherein when M is an odd number more than or equal to 3, the N groups of detection sensor groups share one sub-sensor at the center in the three-dimensional space and are uniformly distributed along the sub-sensor at the center, and when M is an even number more than or equal to 3, the N groups of detection sensor groups share one center point in the three-dimensional space and are uniformly distributed along the center point. The basic theory three-point vibration starting priority order method and the path judging principle provided by the application can be applied to the analysis work of the same type of problems in the 3-dimensional space field.
The embodiment of the application also provides a vibration abnormal sound source measuring device which comprises N groups of detection sensor groups, data acquisition equipment and test analysis equipment which are arranged on a detection plane, wherein the N groups of detection sensor groups are uniformly distributed along the same center point, each detection sensor group comprises M sub-sensors, the M sub-sensors are uniformly distributed at equal intervals along the same straight line, N is a natural number more than or equal to 1, M is a natural number more than or equal to 3, the signal output end of each sub-sensor is respectively and electrically connected with the signal input end of the data acquisition equipment, and the signal output end of the data acquisition equipment is electrically connected with the signal input end of the test analysis equipment.
The test analysis device is used for receiving the first vibration parameter information, determining the vibration starting time sequence of M sub-sensors in the same detection sensor group at a first detection position according to the first vibration parameter information, obtaining a first vibration starting time sequence diagram of each detection sensor group, and determining a first navigation path of an abnormal sound source to be detected on the detection plane according to the first vibration starting time sequence diagram.
Specifically, the data acquisition device may employ LMS SCADAS XS or the like, and the test analysis device may employ LMS test. If 2N+1 acceleration sensors are prepared, 2N acceleration sensors are all arranged on the circumference with the radius of R at equal angles, and then 1 acceleration sensor with the same model is arranged at the center of the circle. The design of the circumferential array vibration path detector is completed by electrically connecting the signal output end of each acceleration sensor with the signal input end of the data acquisition device LMS SCADAS XS and electrically connecting the signal output end of the data acquisition device LMS SCADAS XS with the signal input end of the test analysis device LMS TEST.LAB. The detector is equivalent to integrating N groups of detection sensor groups (3 acceleration sensors in each group) into a circumferential sensor array, and the traversing work of the N groups of detection sensors along the circumference is completed at one time. And deducing which navigation path the abnormal sound source is specifically positioned on according to the three-point starting priority order distinguishing method and the path judging criterion deduced in the foregoing.
Further, the data acquisition device is further configured to select a second detection position on the plane to be detected along the direction of the first navigation path, and obtain second vibration parameter information detected by each sub-sensor at the second detection position of the plane to be detected, where the second detection position is different from the first detection position. The test analysis equipment is also used for receiving the second vibration parameter information, determining the vibration starting time sequence of M sub-sensors in the same detection sensor group at a second detection position according to the second vibration parameter information, and obtaining a second vibration starting sequence diagram of each detection sensor group. The test analysis equipment is also used for determining a second navigation path where the abnormal sound source to be detected is located on the detection plane according to the second vibration starting time sequence diagram. The test analysis equipment is also used for determining the position area of the abnormal sound source to be tested according to the first navigation path and the second navigation path.
Referring to the method for using the circumferential array vibration path detector shown in fig. 11, the designed circumferential array vibration path detector is placed at any Position point (Position-a) on a two-dimensional plane, a first navigation path bel 1 where the vibration abnormal sound source is located can be obtained by combining the simplified path determination principle, and then the circumferential array vibration path detector is moved to another different Position (Position-B), and a second navigation path bel 2 where the vibration abnormal sound source is located is obtained by combining the simplified path determination principle. And taking the crossed overlapping area of the first navigation path Belt1 and the second navigation path Belt2 as the position area of the vibration abnormal sound source.
The method for measuring the abnormal vibration sound source according to the present application will be described in detail with reference to the following examples:
s10, as shown in FIG. 12, arranging 12 acceleration sub-sensors on the circumference with the radius of R at equal angles, placing 1 acceleration sub-sensor at the center of the circle, electrically connecting the signal output end of each acceleration sensor with the signal input end of the data acquisition device LMS SCADAS XS, and electrically connecting the signal output end of the data acquisition device LMS SCADAS XS with the signal input end of the test analysis device LMS TEST.
S20, acquiring time-varying acceleration information detected by each acceleration sensor at a first detection position of a plane to be detected.
S30, determining the vibration starting time sequences of 3 acceleration sensors in the same detection sensor group at the first detection position according to the acceleration information of each acceleration sensor, and obtaining 6 pairs of vibration starting time sequence diagrams which are respectively P1/P2/P3, P8/P2/P13, P7/P2/P12, P6/P2/P11, P5/P2/P10 and P4/P2/P9.
S40, referring to FIG. 13, the starting sequence of the detection sensor group P1/P2/P3 is analyzed and compared first, if the starting sequence of the detection sensor group P1/P2/P3 is quite clear, the abnormal vibration source is not located on the navigation path 03 corresponding to the detection sensor group, the navigation path can be eliminated, and the three-point starting sequence chart is shown in FIG. 13, wherein the abscissa is time, the unit is S, the ordinate is acceleration, and the unit is g. As can be seen from fig. 13, the middle sensor P2 is preferentially activated, the left sensor P1 is activated for the second time, and the right sensor P3 is activated for the last time.
And by analogy, all the detection sensor groups with the vibration starting sequence being capable of being identified are sequentially removed until a detection sensor group with the vibration starting sequence being incapable of being identified is screened out, if the vibration starting sequence of a detection sensor group P7/P2/P12 is finally screened out and the vibration abnormal sound source is necessarily located at a certain position of the navigation path 05 corresponding to the detection sensor group P7/P2/P12.
As shown in fig. 14, as another aspect, the present application also provides a terminal apparatus 200 including one or more Central Processing Units (CPUs) 201, which can perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM) 202 or a program loaded from a storage section 208 into a Random Access Memory (RAM) 203. In the RAM 203, various programs and data necessary for the operation of the terminal apparatus 200 are also stored. The CPU 201, ROM 202, and RAM 203 are connected to each other through a bus 204. An input/output (I/O) interface 205 is also connected to bus 204.
Connected to the I/O interface 205 are an input section 206 including a keyboard, a mouse, and the like, an output section 207 including a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker, and the like, a storage section 208 including a hard disk, and the like, and a communication section 209 including a network interface card such as a LAN card, a modem, and the like. The communication section 209 performs communication processing via a network such as the internet. The 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, or the like is installed on the drive 210 as needed, so that a computer program read out therefrom is installed into the storage section 208 as needed.
In particular, according to embodiments of the present disclosure, the process described above with reference to fig. 1 may be implemented as a computer software program. For example, embodiments of the present disclosure include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program containing program code for performing a vibration abnormal 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.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
As a further aspect, the present application also provides a computer readable storage medium, which may be a computer readable storage medium contained in the apparatus described in the above embodiment, or may be a computer readable storage medium that exists alone and is not assembled into a device. The computer-readable storage medium stores one or more programs for use by one or more processors to perform the vibration abnormal sound source measuring method described in the present application.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units or modules involved in the embodiments of the present application may be implemented in software or in hardware. The described units or modules may also be provided in a processor, for example, each of the units may be a software program provided in a computer or a mobile smart device, or may be separately configured hardware devices. Wherein the names of the units or modules do not in some cases constitute a limitation of the units or modules themselves.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.
Claims (16)
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| CN1851418A (en) * | 2006-05-23 | 2006-10-25 | 江苏大学 | Method for constituting sound-field model of submmersilbe linear focusing pulse supersonic sensor |
| US7929376B2 (en) * | 2008-04-25 | 2011-04-19 | The Boeing Company | Method and apparatus for identifying noise sources |
| US20190102959A1 (en) * | 2017-09-29 | 2019-04-04 | GM Global Technology Operations LLC | Systems and methods to detect abnormalities in a vehicle suspension system |
| CN112924937B (en) * | 2021-01-25 | 2024-06-04 | 桂林电子科技大学 | Positioning device and method for two-dimensional plane bursty sound source |
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