CN116625713A - Vibration amplitude measuring method and device, electronic equipment and storage medium - Google Patents
Vibration amplitude measuring method and device, electronic equipment and storage medium Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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Abstract
The embodiment of the invention discloses a vibration amplitude measuring method, a device, electronic equipment and a storage medium. The method comprises the following steps: synchronously acquiring the path jump time domain data of the path jump target points on each tire of the target vehicle and the vibration time domain data of the target vehicle in the candidate time period; according to the acquired path jump time domain data, determining a target time period with a phase relation between path jump phases of path jump target points on each tire as a preset relation from a candidate time period; and determining target time domain data positioned under the target time period from the vibration time domain data, and analyzing the target time domain data to obtain the vibration amplitude of the target vehicle. According to the technical scheme provided by the embodiment of the invention, aiming at the phase relation among the radial jump phases of the radial jump target points on each tire, the vibration time domain data corresponding to the preset phase relation is analyzed to obtain the vibration amplitude, so that the vibration amplitude obtained by the same vehicle in multiple measurements has high consistency.
Description
Technical Field
The embodiment of the invention relates to the technical field of vehicle testing, in particular to a vibration amplitude measuring method and device, electronic equipment and a storage medium.
Background
It has been found through vehicle tests that, during running of the vehicle, vibration of the vehicle is inevitably caused by radial runout of the tire (hereinafter simply referred to as tire radial runout). Moreover, the vibration amplitudes obtained by the same vehicle in multiple measurements differ too much, for example, the minimum vibration amplitude is 0.77m/s within the 150s data shown in FIG. 1 2 Maximum vibration amplitude 1.42m/s 2 The difference between the two is 1.8 times, namely the fluctuation and the randomness of the vibration amplitude are large.
In development of Noise, vibration and harshness (Noise, vibration and Harshness, NVH) and evaluation of related performance tests, in order to accurately evaluate the improvement effect of each improvement measure, it is necessary to make the vibration amplitudes obtained by the same vehicle in multiple measurements have high consistency.
However, the currently adopted vibration amplitude measurement scheme cannot enable the vibration amplitude obtained by the same vehicle in multiple measurements to have high consistency, which is in need of improvement.
Disclosure of Invention
The embodiment of the invention provides a vibration amplitude measuring method, a device, electronic equipment and a storage medium, so that vibration amplitudes obtained by the same vehicle in multiple measurements have high consistency.
According to an aspect of the present invention, there is provided a vibration amplitude measuring method, which may include:
synchronously acquiring the path jump time domain data of the path jump target points on each tire of the target vehicle and the vibration time domain data of the target vehicle in the candidate time period;
according to the acquired path jump time domain data, determining a target time period with a phase relation between path jump phases of path jump target points on each tire as a preset relation from a candidate time period;
and determining target time domain data positioned under the target time period from the vibration time domain data, and analyzing the target time domain data to obtain the vibration amplitude of the target vehicle.
According to another aspect of the present invention, there is provided a vibration amplitude measuring apparatus, which may include:
the vibration time domain data acquisition module is used for synchronously acquiring the path jump time domain data of the path jump target points on the tires of the target vehicle and the vibration time domain data of the target vehicle in the candidate time period;
the target time period determining module is used for determining a target time period, in which the phase relation between the radial jump phases of the radial jump target points on each tire comprises a preset relation, from the candidate time period according to the acquired radial jump time domain data;
The vibration amplitude obtaining module is used for determining target time domain data positioned in a target time period from the vibration time domain data and obtaining the vibration amplitude of the target vehicle by analyzing the target time domain data.
According to another aspect of the present invention, there is provided an electronic device, which may include:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to cause the at least one processor to implement the vibration amplitude measurement method provided by any embodiment of the present invention when executed.
According to another aspect of the present invention, there is provided a computer readable storage medium having stored thereon computer instructions for causing a processor to perform the vibration amplitude measuring method provided by any of the embodiments of the present invention.
According to the technical scheme, in the candidate time period, the path jump time domain data of the path jump target points on the tires of the target vehicle and the vibration time domain data of the target vehicle are synchronously acquired; according to the acquired path jump time domain data, determining a target time period with a phase relation between path jump phases of path jump target points on each tire as a preset relation from the candidate time period; and determining target time domain data positioned under the target time period from the vibration time domain data, and analyzing the target time domain data to obtain the vibration amplitude of the target vehicle. According to the technical scheme, aiming at the phase relation among the radial jump phases of the radial jump target points on each tire, the vibration time domain data corresponding to the preset phase relation (namely the preset relation) are analyzed to obtain the vibration amplitude, so that the vibration amplitude obtained by the same vehicle in multiple measurements has high consistency.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention, nor is it intended to be used to limit the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a graph of vibration amplitude versus time for vehicle vibrations due to tire runout;
FIG. 2 is a flow chart of a vibration amplitude measurement method provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of a measurement position of tire radial runout data in a vibration amplitude measurement method according to an embodiment of the present invention;
FIG. 4 is a flow chart of another vibration amplitude measurement method provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of the arrangement positions of a Hall sensor and magnetic steel in another vibration amplitude measurement method according to an embodiment of the present invention;
FIG. 6 is a flow chart of another vibration amplitude measurement method provided in accordance with an embodiment of the present invention;
FIG. 7 is a flow chart of another vibration amplitude measurement method provided in accordance with an embodiment of the present invention;
FIG. 8 is a block diagram of a vibration amplitude measuring apparatus according to an embodiment of the present invention
Fig. 9 is a schematic structural view of an electronic device implementing a vibration amplitude measuring method according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. The cases of "target", "original", etc. are similar and will not be described in detail herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Before describing the embodiment of the present invention, an application scenario of the embodiment of the present invention is described in an exemplary manner. For example, it has been found through testing that the vibration amplitude of a vehicle is related to the excitation amplitude of a tire, while the excitation amplitude is related to the radial runout amplitude and radial runout phase of the tire. During the running of the vehicle, the radial jump value will not change, but the radial jump phase will change slowly due to the factors such as the rolling radius of the tire, the road turning, the tire pressure, etc., that is, the phase relation between the radial jump phases of different tires will change. Therefore, in order to make the vibration amplitudes of the same vehicle in a plurality of measurements have a high consistency, it is necessary to determine the phase relationship between the radial runout phases of the respective tires. For this, the following embodiments are proposed.
Fig. 2 is a flowchart of a vibration amplitude measuring method according to an embodiment of the present invention. The present embodiment can be applied to a case where the vibration amplitude of the vehicle vibration due to the tire runout is measured. The method may be performed by a vibration amplitude measuring device provided by an embodiment of the present invention, which may be implemented in software and/or hardware, and which may be integrated on an electronic device, which may be a variety of user terminals or servers.
Referring to fig. 2, the method of the embodiment of the present invention specifically includes the following steps:
s110, synchronously acquiring the path jump time domain data of the path jump target point on each tire of the target vehicle and the vibration time domain data of the target vehicle in the candidate time period.
The target vehicle is understood to be a vehicle for which a vibration amplitude measurement is to be carried out. For each of the tires of the target vehicle, the path-jump target point on the tire may be understood as a position on the tire where the path-jump time-domain data acquisition is to be performed, for example, a path-jump highest point or a path-jump lowest point, etc., and particularly, a path-jump highest point, because the path-jump highest point has the greatest influence on vibrations of the target vehicle.
A candidate time period may be understood as a time period for data acquisition, in particular for simultaneous acquisition of path-hop time domain data and vibration time domain data. Specifically, in the candidate time period, the path jump time domain data of the path jump target point on each tire and the vibration time domain data of the target vehicle are synchronously collected, wherein the path jump time domain data can be understood as data generated in the time domain of the path jump target point in the path jump process of the tire, and the target vibration data can be understood as data in the time domain of the target vehicle generated by vibration.
S120, determining a target time period with a phase relation between the radial jump phases of radial jump target points on each tire as a preset relation from the candidate time period according to the acquired radial jump time domain data.
The preset relationship may be understood as a preset phase relationship applied in the vibration amplitude measurement process, for example, the preset phase relationship may be the same phase, the opposite phase, or a certain phase difference, which is not specifically limited herein. As is clear from the above description, the vibration amplitudes measured multiple times have high consistency with the phase relationship between the runout phases of the runout target points of the respective tires unchanged. Therefore, according to the acquired time domain data of the radial jump corresponding to each tire, the corresponding phase relation at each candidate time point in the candidate time period can be determined, and then the target time period with the phase relation being the preset relation is determined from the candidate time period, namely the phase relation among the radial jump phases of the radial jump target points in the target time period is the preset relation. It is understood that the target time period is part or all of the candidate time period.
S130, determining target time domain data positioned in a target time period from the vibration time domain data, and analyzing the target time domain data to obtain the vibration amplitude of the target vehicle.
The method comprises the steps of determining target time domain data located in a target time period from vibration time domain data, namely determining target time domain data acquired in the target time period from the vibration time domain data. In view of the above, the target time domain data is vibration time domain data acquired under the condition that the phase relationship is a preset relationship, so that the vibration amplitude of the target vehicle obtained by analyzing the target time domain data has high consistency in multiple measurements, that is, the vibration amplitudes obtained by analyzing the plurality of target time domain data respectively have high consistency. It will be appreciated that the above-mentioned multiple target time domain data may be acquired in the same or different candidate time periods, which is relevant to the actual situation, and is not specifically limited herein.
According to the technical scheme, in the candidate time period, the path jump time domain data of the path jump target points on the tires of the target vehicle and the vibration time domain data of the target vehicle are synchronously acquired; according to the acquired path jump time domain data, determining a target time period with a phase relation between path jump phases of path jump target points on each tire as a preset relation from the candidate time period; and determining target time domain data positioned under the target time period from the vibration time domain data, and analyzing the target time domain data to obtain the vibration amplitude of the target vehicle. According to the technical scheme, aiming at the phase relation among the radial jump phases of the radial jump target points on each tire, the vibration time domain data corresponding to the preset phase relation (namely the preset relation) are analyzed to obtain the vibration amplitude, so that the vibration amplitude obtained by the same vehicle in multiple measurements has high consistency.
An alternative solution is to obtain the radial jump target point of each of the tires by:
measuring candidate path jump data of each path jump candidate point on a target area of the tire respectively, and determining target path jump data from the candidate path jump data of each path jump candidate point;
and during the rotation of the tire, taking the obtained path jump candidate points corresponding to the target path jump data in the path jump candidate points as the path jump target points of the tire.
The target area may be understood as an area on the tire where candidate runout data acquisition is to be performed, and in connection with an application scenario possibly related to the embodiment of the present invention, the target area may be a middle area on the tire, because the middle area is an area with the largest acting force between the tire and the ground, that is, the vibration influence of the runout on the middle area on the target vehicle is the largest. The number of the path jump candidate points may be one, two or more, which may be set according to actual situations, and is not specifically limited herein. The radial jump time domain data may be understood as data generated in the time domain at the radial jump candidate point during the tire radial jump.
The candidate path jump data of each path jump candidate point on the target area is measured respectively, and then the target path jump data is determined from the candidate path jump data of each path jump candidate point, for example, the largest, middle or smallest candidate path jump data in the candidate path jump data can be used as the target path jump data, and especially the largest candidate path jump data can be used as the target path jump data, because the path jump on the path jump candidate point corresponding to the largest vibration influence on the target vehicle is brought. On the basis, the tire is continuously rotated, and the obtained path jump candidate points corresponding to the target path jump data in the path jump candidate points are used as path jump target points of the tire.
In order to better understand the above-described acquisition process of candidate path hop data, an exemplary description thereof will be given below with reference to specific examples. Illustratively, as shown in fig. 3, which shows a side view (left schematic) and a front view (right schematic) of the tire, a dark middle area in the side view is a target area, and white dots are path jump candidate points. Before the test, the target vehicle is driven on a good road surface for not less than 10km so as to eliminate the local deformation of the tire in a fixed state. The body or axle of the target vehicle is supported by means of a jack or the like, so that each tire leaves the ground to rotate freely. For each tire in each tire, a laser displacement sensor, a dial indicator or other tire diameter jump measuring instrument is adopted to measure the candidate diameter jump data of each diameter jump candidate point on the middle area of the tire, namely, the candidate diameter jump data of one circle of the tire is measured, and the maximum diameter jump data is found from the candidate diameter jump data. Then, slowly rotating the tire again, combining the real-time candidate path jump data, and finding a path jump candidate point corresponding to the maximum path jump data, wherein the path jump candidate point is the highest point of the path jump, namely the maximum position of the path jump, and the vibration influence of the path jump on the target vehicle is the largest.
In another alternative solution, in a candidate period of time, synchronously acquiring path-jump time domain data of path-jump target points on each tire of a target vehicle, including:
and synchronously acquiring the path jump time domain data of the path jump target points on each tire of the target vehicle in a candidate time period aiming at the target vehicle which runs at a constant speed based on the target vehicle speed.
As is apparent from the above description, the amplitude of vibration of the target vehicle caused by the tire runout under the running condition is related not only to the phase relationship but also to the running speed of the target vehicle. Therefore, the target vehicle can run at a constant speed according to the target vehicle speed, and the obtained vibration amplitude is the vibration amplitude at the target vehicle speed, so that the vibration amplitude obtained by the same vehicle in multiple measurements is further ensured to have high consistency.
Fig. 4 is a flow chart of another vibration amplitude measurement method provided in an embodiment of the present invention. The present embodiment is optimized based on the above technical solutions. In this embodiment, optionally, a magnetic steel is disposed on a connection line between an axle center of each tire and a radial jump target point of the tire, and a hall sensor that cooperates with the magnetic steel is disposed on a fixed component corresponding to the target vehicle, where a distance between the magnetic steel and the hall sensor is within a preset distance range; collecting the path jump time domain data of the path jump target point on each tire of the target vehicle, comprising: and acquiring the radial jump time domain data of the radial jump target point on each tire by a Hall sensor corresponding to the tire and matching with magnetic steel corresponding to the tire. Wherein, the explanation of the same or corresponding terms as the above embodiments is not repeated herein.
Referring to fig. 4, the method of this embodiment may specifically include the following steps:
s210, synchronously acquiring vibration time domain data of a target vehicle in a candidate time period for each tire in each tire of the target vehicle, and acquiring path jump time domain data of a path jump target point on the tire by a Hall sensor corresponding to the tire and matching with magnetic steel corresponding to the tire;
the magnetic steel is arranged on a connecting line of the axle center of the tire and the radial jump target point, the Hall sensor which is matched with the magnetic steel is arranged on a fixed part corresponding to the target vehicle, and the distance between the magnetic steel and the Hall sensor is within a preset distance range.
For each tire in each tire, magnetic steel is arranged on a connecting line between the axle center of the tire and a radial jump target point of the tire, and a hall sensor matched with the magnetic steel is arranged on a fixed part corresponding to the target vehicle, and the fixed part can be a non-moving part on the target vehicle or a special bracket manufactured for the target vehicle in combination with the application scene possibly related to the embodiment of the invention, and the like, and is not particularly limited herein. The distance between the magnetic steel and the Hall sensor can be within a preset distance range, so that the Hall sensor can sense the magnetic steel. For example, referring to fig. 5, an example of an arrangement of the magnetic steel and the hall sensor is shown here by taking a preset distance range of 2-5mm as an example.
Therefore, each tire is respectively corresponding to the respective magnetic steel and the Hall sensor, and the radial jump time domain data of each tire can be acquired according to the Hall sensor respectively corresponding to each tire and then matched with the corresponding magnetic steel, so that the phase relation of each tire can be analyzed based on the acquired radial jump time domain data.
S220, after the corresponding path jump time domain data of each tire are acquired, determining a target time period with a phase relation between path jump phases of path jump target points on each tire as a preset relation from the candidate time period according to the acquired path jump time domain data.
S230, determining target time domain data positioned in a target time period from the vibration time domain data, and analyzing the target time domain data to obtain the vibration amplitude of the target vehicle.
According to the technical scheme, the magnetic steel and the Hall sensor which correspond to the radial jump target point are respectively arranged on each tire, and radial jump time domain data are acquired based on the magnetic steel and the Hall sensor, so that the phase relation of each tire can be accurately analyzed based on the acquired radial jump time domain data.
An optional technical scheme is that radial jump time domain data acquired by a Hall sensor are represented by rectangular wave signals;
According to the acquired path jump time domain data, determining a target time period with a phase relation between path jump phases of path jump target points on each tire as a preset relation from a candidate time period, wherein the target time period comprises the following steps:
according to the phase relation of the rectangular wave signals respectively collected for each tire in the candidate time period, determining a target time period with the phase relation among the radial jump phases of the radial jump target points on each tire as a preset relation from the candidate time period.
Wherein the magnetic steel is arranged at a position associated with a runout target point of the tire and follows the tire to rotate. Under the condition that the magnetic steel passes through the Hall sensor each time, the Hall sensor outputs a rectangular wave signal, namely, the path jump time domain data acquired by the Hall sensor can be represented based on the rectangular wave signal.
On the basis, each tire outputs a respective rectangular wave signal, and the phase relation among the rectangular wave signals can be used for representing the phase relation among the path jump target points, so that the target time period is determined from the candidate time periods according to the phase relation among the rectangular wave signals.
According to the technical scheme, the accurate determination of the target time period is realized through the phase relation between the rectangular wave signals output by the Hall sensor which is matched with the magnetic steel.
Fig. 6 is a flowchart of another vibration amplitude measurement method provided in an embodiment of the present invention. The present embodiment is optimized based on the above technical solutions. In this embodiment, optionally, a vibration sensor is disposed on a vibration attention point of the target vehicle, and the collecting vibration time domain data of the target vehicle includes: acquiring vibration time domain data of a vibration attention point through a vibration sensor; obtaining the vibration amplitude of the target vehicle by analyzing the target time domain data, including: and obtaining the vibration amplitude of the vibration attention point by analyzing the target time domain data. Wherein, the explanation of the same or corresponding terms as the above embodiments is not repeated herein.
Referring to fig. 6, the method of this embodiment may specifically include the following steps:
s310, synchronously acquiring the path jump time domain data of the path jump target points on each tire of the target vehicle in a candidate time period, and acquiring the vibration time domain data of the target vehicle through a vibration sensor;
wherein the vibration sensor is arranged on a vibration focus point of the target vehicle.
The vibration attention point can be understood as a position on the target vehicle, which is concerned about the influence degree of vibration, and in combination with the application scenario possibly related to the embodiment of the present invention, for example, in the case of paying attention to the comfort of the cab of the driver, the position related to the seat can be taken as the vibration attention point.
The vibration sensor is arranged on the vibration attention point, and the acceleration sensor can be particularly applied as the vibration sensor in combination with the application scene possibly related to the embodiment of the invention. Thus, vibration time domain data of the vibration point of interest can be acquired by the vibration sensor.
S320, determining a target time period with a phase relation between the radial jump phases of the radial jump target points on each tire as a preset relation from the candidate time period according to the acquired radial jump time domain data.
S330, determining target time domain data positioned in a target time period from the vibration time domain data, and obtaining the vibration amplitude of the vibration attention point by analyzing the target time domain data.
According to the technical scheme, the vibration time domain data on the vibration attention point is effectively acquired through the vibration sensor arranged on the vibration attention point.
Fig. 7 is a flowchart of another vibration amplitude measurement method provided in an embodiment of the present invention. The present embodiment is optimized based on the above technical solutions. In this embodiment, optionally, by analyzing the target time domain data, a vibration amplitude of the target vehicle is obtained, including: performing Fourier transform on the target time domain data to obtain a spectrogram; obtaining the excitation frequency of each tire according to the running speed of the target vehicle and the rolling radius of each tire; the vibration amplitude corresponding to the excitation frequency is read from the spectrogram, and the read vibration amplitude is used as the vibration amplitude generated by excitation of each tire at the running speed of the target vehicle. Wherein, the explanation of the same or corresponding terms as the above embodiments is not repeated herein.
Referring to fig. 7, the method of this embodiment may specifically include the following steps:
s410, synchronously acquiring the path jump time domain data of the path jump target point on each tire of the target vehicle and the vibration time domain data of the target vehicle in the candidate time period.
S420, determining a target time period with a phase relation between the radial jump phases of radial jump target points on each tire as a preset relation from the candidate time period according to the acquired radial jump time domain data.
S430, determining target time domain data positioned in a target time period from the vibration time domain data, and performing Fourier transform on the target time domain data to obtain a spectrogram.
The Fourier transform is performed on the target time domain data, so that the target time domain data in the time domain can be converted into a spectrogram in the frequency domain.
S440, obtaining the excitation frequency of each tire according to the running speed of the target vehicle and the rolling radius of each tire.
Wherein the excitation frequency of the tire is related to the running speed of the target vehicle and the rolling radius of the tire, i.e. the excitation frequency is different at different running speeds and/or different rolling radii. Therefore, here the excitation frequency can be derived from the travel speed and the rolling radius. By way of example, the excitation frequency may be obtained according to the following equation:
Wherein f represents the excitation frequency in Hz; v represents the speed of travel in km/h; r denotes a rolling radius, and the unit is m.
S450, reading out the vibration amplitude corresponding to the excitation frequency from the spectrogram, and taking the read vibration amplitude as the vibration amplitude generated by excitation of each tire at the running speed of the target vehicle.
The vibration amplitude corresponding to the excitation frequency is read from the spectrogram, and the vibration amplitude is the vibration amplitude generated by excitation of each tire at the running speed of the target vehicle.
According to the technical scheme, the target time domain data are converted into the spectrogram, then the excitation frequency of each tire is obtained according to the running speed of the target vehicle and the rolling radius of each tire, and the vibration amplitude corresponding to the excitation frequency is read from the spectrogram, so that the accurate determination of the vibration amplitude generated by the excitation of each tire of the target vehicle at the running speed is realized.
In order to better understand the above-described respective technical solutions as a whole, an exemplary description thereof is given below in conjunction with specific examples. Illustratively, the following six steps are shown:
1. measuring candidate path jump data for each tire
Before the test, the target vehicle is driven on a good road surface for not less than 10km so as to eliminate the local deformation of the tire in a fixed state. The body or axle of the target vehicle is supported by means of a jack or the like, so that each tire leaves the ground to rotate freely. For each tire, a laser displacement sensor, a dial indicator or other tire diameter jump measuring instrument is adopted to measure the candidate diameter jump data of each diameter jump candidate point on the middle area of the tire, namely, the candidate diameter jump data of one circle of the tire.
2. Marking the highest point of the radial jump
Finding out the maximum diameter jump data from the measured candidate diameter jump data of the tire for one circle, then slowly rotating the tire again, and combining the real-time candidate diameter jump data, thereby identifying the diameter jump candidate point corresponding to the maximum diameter jump data, wherein the corresponding diameter jump candidate point is the highest diameter jump point, namely the maximum diameter jump position, and the vibration influence of the diameter jump on the target vehicle is the largest. Marking the maximum radial jump position, then selecting a proper position on the connecting line of the axle center of the tire and the mark, pasting magnetic steel on a proper position on a non-moving part of the target vehicle, and finding a proper position to paste a Hall sensor, so that the top ends of the Hall sensors are aligned with the magnetic steel, and the distance between the two is kept within 2mm-5 mm. It should be noted that the same hall sensor and magnetic steel are disposed on each tire, and signal lines of all hall sensors are connected to the front end of data acquisition, so as to implement measurement on the mark in the subsequent test, and thus analyze the phase relation of the highest point of each radial jump.
3. Acceleration sensor arrangement
Arranging an acceleration sensor on the vibration attention point, and connecting a signal wire of the acceleration sensor to a data acquisition front end connected with the Hall sensor, namely connecting the acceleration sensor and the data acquisition front end to the same data acquisition front end so as to realize vibration amplitude measurement on the vibration attention point in a subsequent experiment.
4. Time domain data acquisition under driving working condition
The target vehicle runs on a smooth good road surface at a uniform speed at the target vehicle speed concerned, and synchronously acquires the path jump time domain data transmitted by the Hall sensor and the vibration time domain data transmitted by the acceleration sensor. In practical applications, alternatively, the target vehicle speed may include a vehicle speed of ten times in a range from 30km/h to 100km/h (or 120 km/h), so that the path jump time domain data and the vibration time domain data at each target vehicle speed are measured. During the time domain data acquisition, the phase of each tire is changed as much as possible through driving behaviors such as multiple times of lane changing, turning around, turning and the like, so that the time domain data of the radial jump under the same phase of the highest point of all radial jumps is acquired.
5. Selecting target time domain data for a target time period
Since the vibration amplitude of the tire excitation is related to the phase relation of the highest point of the radial jump of each tire, vibration time domain data in the time domain can be clearly determined after the phase relation is judged by the Hall sensor. Specifically, the magnetic steel is stuck on a position associated with the highest point of the radial jump of the tire and rotates along with the tire. Under the condition that the magnetic steel passes through the Hall sensor each time, the Hall sensor outputs a rectangular wave signal. On the basis, each tire outputs a respective rectangular wave signal, and the phase relation between the rectangular wave signals can represent the phase relation between the path jump target points, so that a time period with the same phase relation between the rectangular wave signals can be used as a target time period, and vibration time domain data acquired under the target time period can be used as target time domain data.
6. Target time domain data processing
Performing Fourier transform on the target time domain data to obtain a spectrogram, and obtaining the excitation frequency of each tire according to the running speed of the target vehicle and the rolling radius of each tire; further, the vibration amplitude corresponding to the excitation frequency is read from the spectrogram, and the vibration amplitude is the vibration amplitude generated by excitation of each tire of the target vehicle at the running speed. In practical application, the vibration amplitude at different running speeds can be measured according to the measurement requirement. The measurement of the vibration amplitude is completed.
By the aid of the method, accurate measurement of vibration amplitude caused by tire radial runout under uniform-speed running of the whole vehicle is achieved.
Fig. 8 is a block diagram of a vibration amplitude measuring apparatus according to an embodiment of the present invention for performing the vibration amplitude measuring method according to any of the above embodiments. The device belongs to the same inventive concept as the vibration amplitude measuring method of the above embodiments, and in the details of the vibration amplitude measuring device, reference may be made to the embodiments of the vibration amplitude measuring method described above. Referring to fig. 8, the apparatus may specifically include: a vibration time domain data acquisition module 510, a target time period determination module 520, and a vibration amplitude obtaining module 530.
The vibration time domain data acquisition module 510 is configured to synchronously acquire, in a candidate time period, path jump time domain data of a path jump target point on each tire of the target vehicle, and vibration time domain data of the target vehicle;
the target time period determining module 520 is configured to determine, from the candidate time periods, a target time period in which a phase relationship between the radial jump phases of the radial jump target points on each tire is a preset relationship according to the acquired radial jump time domain data;
the vibration amplitude obtaining module 530 is configured to determine target time domain data located under the target time period from the vibration time domain data, and obtain the vibration amplitude of the target vehicle by analyzing the target time domain data.
Optionally, a magnetic steel is arranged on a connecting line of the axle center of each tire and the radial jump target point of the tire, a hall sensor which is matched with the magnetic steel to work is arranged on a fixed part corresponding to the target vehicle, and the distance between the magnetic steel and the hall sensor is within a preset distance range;
the vibration time domain data acquisition module 510 may include:
the first acquisition unit of the radial jump time domain data is used for acquiring the radial jump time domain data of the radial jump target point on each tire through the Hall sensor corresponding to the tire and the magnetic steel corresponding to the tire.
On the basis, optionally, the path jump time domain data acquired by the Hall sensor is represented by a rectangular wave signal; the target time period determining module 520 is specifically configured to:
according to the phase relation of the rectangular wave signals respectively collected for each tire in the candidate time period, determining a target time period with the phase relation among the path jump phases of the path jump target points on each tire comprising a preset relation from the candidate time period.
Optionally, the path-jump target point of each tire in each tire is obtained by the following module:
the target path jump data determining module is used for respectively measuring the candidate path jump data of each path jump candidate point on the target area of the tire and determining the target path jump data from the candidate path jump data of each path jump candidate point;
and the path jump target point obtaining module is used for taking the path jump candidate points corresponding to the target path jump data in the obtained path jump candidate points as the path jump target points of the tire in the rotation process of the tire.
Optionally, a vibration sensor is disposed on a vibration focus point of the target vehicle;
the vibration time domain data acquisition module 510 may include:
the vibration time domain data acquisition unit is used for acquiring vibration time domain data of the vibration attention point through the vibration sensor;
The vibration amplitude obtaining module 530 may include:
the first vibration amplitude obtaining unit is used for obtaining the vibration amplitude of the vibration attention point by analyzing the target time domain data.
Optionally, the vibration amplitude obtaining module 530 may include:
the spectrogram obtaining unit is used for carrying out Fourier transform on the target time domain data to obtain a spectrogram;
an excitation frequency obtaining unit for obtaining the excitation frequency of each tire according to the running speed of the target vehicle and the rolling radius of each tire;
and the second vibration amplitude obtaining unit is used for reading the vibration amplitude corresponding to the excitation frequency from the spectrogram and taking the read vibration amplitude as the vibration amplitude generated by excitation of each tire under the running speed of the target vehicle.
Optionally, the vibration time domain data acquisition module 510 may include:
the second acquisition unit is used for synchronously acquiring the path jump time domain data of the path jump target points on the tires of the target vehicle in the candidate time period aiming at the target vehicle which runs at a constant speed based on the target vehicle speed.
The vibration amplitude measuring device provided by the embodiment of the invention is used for synchronously acquiring the path jump time domain data of the path jump target points on each tire of the target vehicle and the vibration time domain data of the target vehicle in a candidate time period through the vibration time domain data acquisition module; the target time period determining module is used for determining a target time period with a phase relation between the radial jump phases of radial jump target points on each tire as a preset relation from the candidate time period according to the acquired radial jump time domain data; and determining target time domain data positioned in a target time period from the vibration time domain data through a vibration amplitude obtaining module, and obtaining the vibration amplitude of the target vehicle through analyzing the target time domain data. According to the device, the vibration time domain data corresponding to the preset phase relation (namely the preset relation) are analyzed to obtain the vibration amplitude aiming at the phase relation among the radial jump phases of the radial jump target points on each tire, so that the vibration amplitude obtained by the same vehicle in multiple measurements has high consistency.
The vibration amplitude measuring device provided by the embodiment of the invention can execute the vibration amplitude measuring method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the executing method.
It should be noted that, in the above-described embodiments of the vibration amplitude measuring apparatus, each unit and module included is divided according to the functional logic only, but is not limited to the above-described division, as long as the corresponding function can be realized; in addition, the specific names of the functional units are also only for distinguishing from each other, and are not used to limit the protection scope of the present invention.
Fig. 9 shows a schematic diagram of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 9, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as the vibration amplitude measurement method.
In some embodiments, the vibration amplitude measurement method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the vibration amplitude measuring method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the vibration amplitude measurement method in any other suitable way (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method of measuring vibration amplitude, comprising:
synchronously acquiring the path jump time domain data of the path jump target points on each tire of the target vehicle and the vibration time domain data of the target vehicle in a candidate time period;
according to the acquired radial jump time domain data, determining a target time period with a phase relation between radial jump phases of radial jump target points on each tire as a preset relation from the candidate time period;
And determining target time domain data positioned in the target time period from the vibration time domain data, and obtaining the vibration amplitude of the target vehicle by analyzing the target time domain data.
2. The method according to claim 1, wherein a magnetic steel is arranged on a line connecting an axle center of each tire of the respective tires and a runout target point of the tire, and a hall sensor working in cooperation with the magnetic steel is arranged on a fixed member corresponding to the target vehicle, and a distance between the magnetic steel and the hall sensor is within a preset distance range;
the collecting the path jump time domain data of the path jump target point on each tire of the target vehicle comprises the following steps:
and acquiring the radial jump time domain data of the radial jump target point on each tire by the Hall sensor corresponding to the tire and matching with the magnetic steel corresponding to the tire.
3. The method according to claim 2, wherein the path-hopping time-domain data acquired by the hall sensor is represented by a rectangular wave signal;
determining, from the candidate time period, a target time period in which a phase relationship between the radial jump phases of the radial jump target points on each tire is a preset relationship according to the acquired radial jump time domain data, including:
And determining a target time period with a phase relation between the radial jump phases of radial jump target points on each tire as a preset relation from the candidate time period according to the phase relation of the rectangular wave signals respectively acquired for each tire in the candidate time period.
4. The method according to claim 1, wherein the radial jump target point for each of said tires is obtained by:
measuring candidate radial jump data of each radial jump candidate point on a target area of the tire respectively, and determining target radial jump data from the candidate radial jump data of each radial jump candidate point;
and during the rotation process of the tire, taking the obtained path jump candidate points corresponding to the target path jump data in the path jump candidate points as the path jump target point of the tire.
5. The method of claim 1, wherein the vibration sensor is disposed on a vibration point of interest of the target vehicle, and the acquiring vibration time domain data of the target vehicle comprises
Acquiring vibration time domain data of the vibration attention point through the vibration sensor;
the obtaining the vibration amplitude of the target vehicle by analyzing the target time domain data includes:
And obtaining the vibration amplitude of the vibration attention point by analyzing the target time domain data.
6. The method according to claim 1, wherein the obtaining the vibration amplitude of the target vehicle by analyzing the target time domain data includes:
performing Fourier transform on the target time domain data to obtain a spectrogram;
obtaining the excitation frequency of each tire according to the running speed of the target vehicle and the rolling radius of each tire;
and reading the vibration amplitude corresponding to the excitation frequency from the spectrogram, and taking the read vibration amplitude as the vibration amplitude of the target vehicle caused by excitation of each tire at the running speed.
7. The method of claim 1, wherein the synchronously acquiring the path-hop time-domain data of the path-hop target points on each tire of the target vehicle during the candidate time period comprises:
and synchronously acquiring the path jump time domain data of the path jump target points on each tire of the target vehicle in a candidate time period aiming at the target vehicle which runs at a constant speed based on the target vehicle speed.
8. A vibration amplitude measuring device, comprising:
The vibration time domain data acquisition module is used for synchronously acquiring the path jump time domain data of the path jump target points on the tires of the target vehicle and the vibration time domain data of the target vehicle in the candidate time period;
the target time period determining module is used for determining a target time period, in which the phase relation between the radial jump phases of the radial jump target points on each tire comprises a preset relation, from the candidate time period according to the acquired radial jump time domain data;
the vibration amplitude obtaining module is used for determining target time domain data located in the target time period from the vibration time domain data, and obtaining the vibration amplitude of the target vehicle by analyzing the target time domain data.
9. An electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the memory stores a computer program executable by the at least one processor to cause the at least one processor to perform the vibration amplitude measurement method according to any one of claims 1-7.
10. A computer readable storage medium storing computer instructions for causing a processor to perform the method of measuring vibration amplitude according to any one of claims 1-7.
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