CN109297731B - Control method and device for tire running test - Google Patents
Control method and device for tire running test Download PDFInfo
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- CN109297731B CN109297731B CN201811447476.4A CN201811447476A CN109297731B CN 109297731 B CN109297731 B CN 109297731B CN 201811447476 A CN201811447476 A CN 201811447476A CN 109297731 B CN109297731 B CN 109297731B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention provides a control method and a device for a tire running test, which can obtain an analog signal obtained in the tire running test process, convert the analog signal into a vibration parameter relation chart for representing the vibration condition of the inner part of a tire body of the tire in the tire running test, stop the tire running test if the vibration condition of the inner part of the tire body is determined to be abnormal based on the vibration parameter relation chart, thereby realizing the control of the tire running test based on the vibration condition of the inner part of the tire body, and the vibration condition of the inner part of the tire body is abnormal when the quality loss occurs in the inner part of the tire body, so that the tire running test can be stopped when the quality loss just occurs in the inner part of the tire body (namely the inner part of the tire body has initial quality loss), can reduce the expansion of the inner quality loss of the tire compared with the prior art, for example, the expansion of the inner quality loss of the tire from point to surface can be reduced, thereby determining the initial quality loss, the accuracy of the determined initial quality loss position is improved.
Description
Technical Field
The invention belongs to the field of tire detection, and particularly relates to a control method and device for a tire running test.
Background
With the development of science and technology and economy, the safety problem of automobiles is more and more emphasized, and the quality of tires is the most important part of the safety problem of automobiles, so that various tests are required to be carried out on the tires to ensure the quality of the tires, wherein the tire running test is one of various tests of the tires and is used for detecting the position of quality loss in tire bodies under high-speed running of the tires.
Nowadays, the process of the tire running test method is as follows: the tire is arranged on the base, a certain load is applied to the tire through the base, and the base provides power for the hub of the tire, so that the tire rotates at a high speed under the driving of the hub; when the tyre body of the tyre is damaged, the tyre leaks, and the air pressure monitoring device can alarm to inform the stop of the running test of the tyre when monitoring the tyre leakage. However, this method causes initial quality loss in the carcass of the tire for a certain period of time until the tire is flat, and stops the running test of the tire, resulting in an error in the position of the initial quality loss thus determined.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for controlling a tire running test, which are used to control the tire running test based on the vibration condition inside a tire casing, so as to determine the initial quality loss position on the quality loss of one point.
The invention provides a control method of a tire running test, which comprises the following steps:
obtaining an analog signal obtained in the tire running test process;
converting the analog signal into a vibration parameter relation graph, wherein the vibration parameter relation graph is used for representing the inner vibration condition of a tire body of the tire in the tire running test;
and if the abnormal vibration condition in the tire body is determined based on the vibration parameter relation graph, stopping the tire running test.
Preferably, the step of stopping the tire running test if it is determined that the internal vibration of the tire casing is abnormal based on the vibration parameter map includes:
if the value of the first parameter in the vibration parameter relation graph is abnormal, determining that the internal vibration condition of the tire body is abnormal, wherein the value of the first parameter is used for representing the internal vibration amplitude of the tire body;
and stopping the tire running test when the vibration condition inside the tire body is abnormal.
Preferably, if the value of the first parameter in the vibration parameter relationship diagram is abnormal, determining that the internal vibration condition of the tire casing is abnormal includes:
and if the value of the first parameter in the vibration parameter relation graph exceeds a preset threshold value, determining that the internal vibration condition of the tire body is abnormal.
Preferably, the converting the analog signal into a vibration parameter map includes:
converting the analog signal to a digital signal;
extracting a plurality of values of a first parameter and a plurality of values of a second parameter from the digital signal, wherein any one of the plurality of values of the second parameter corresponds to one of the plurality of values of the first parameter, and the value of the first parameter is used for representing the inner vibration amplitude of the tire body;
and taking the first parameter as a vertical coordinate, taking the second parameter as a horizontal coordinate, and obtaining the vibration parameter relation graph based on the plurality of values of the first parameter and the plurality of values of the second parameter.
The invention also provides a control system for the tire running test, which comprises the following components: the device comprises an acquisition module, a conversion module and a control module;
the acquisition module is used for acquiring analog signals obtained in the tire running test process;
the conversion module is used for converting the analog signals into a vibration parameter relation graph, and the vibration parameter relation graph is used for representing the inner vibration condition of a tire body of the tire in the tire running test;
and the control module is used for stopping the tire running test if the abnormal vibration condition in the tire body is determined based on the vibration parameter relation diagram.
Preferably, the control module includes: determining a tire abnormality unit and a stop operation unit;
the tire abnormity determining unit is used for determining that the internal vibration condition of the tire body is abnormal if the value of a first parameter in the vibration parameter relation diagram is abnormal, wherein the value of the first parameter is used for representing the internal vibration amplitude of the tire body;
and the running stopping unit is used for stopping the tire running test under the condition that the vibration condition inside the tire body is abnormal.
Preferably, the tire abnormality determining unit is configured to determine that the internal vibration condition of the tire casing is abnormal if a value of the first parameter in the vibration parameter relation diagram exceeds a preset threshold.
Preferably, the conversion module includes: a conversion unit, an extraction unit and a drawing unit;
the conversion unit is used for converting the analog signal into a digital signal;
the extraction unit is used for extracting a plurality of values of a first parameter and a plurality of values of a second parameter from the digital signal, wherein any one of the plurality of values of the second parameter corresponds to one of the plurality of values of the first parameter, and the value of the first parameter is used for representing the internal vibration amplitude of the tire body;
the drawing unit is used for taking the first parameter as a vertical coordinate, taking the second parameter as a horizontal coordinate, and obtaining the vibration parameter relation graph based on a plurality of values of the first parameter and a plurality of values of the second parameter.
The present invention further provides a control apparatus for a tire running test, comprising: the device comprises a fixer, a rotator, a signal acquirer and a controller;
the fixer is used for fixing the tire and applying load to the tire;
the rotator is used for rotating the tire;
the signal acquirer is used for acquiring an analog signal obtained in the tire running test process and sending the analog signal to the controller;
the controller is used for converting the analog signal into a vibration parameter relation diagram, stopping the tire running test if the internal vibration condition of the tire body is determined to be abnormal based on the vibration parameter relation diagram, and the vibration parameter relation diagram is used for representing the internal vibration condition of the tire body of the tire in the tire running test.
Preferably, the connection relationship of the holder, the rotator, the signal obtainer and the controller is as follows:
the rotator and the holder are not in close contact, and the distance between the rotator and the holder is smaller than the radius of the tire;
the fixer is connected with the signal obtainer, and the signal obtainer is connected with the controller.
According to the technical scheme, the analog signal obtained in the tire running test process is obtained, the analog signal is converted into a vibration parameter relation graph used for representing the internal vibration condition of the tire body of the tire in the tire running test, if the internal vibration condition of the tire body is determined to be abnormal based on the vibration parameter relation graph, stopping the tire running test, thereby realizing the control of the tire running test based on the vibration condition inside the tire body, when the quality loss of the inner part of the tire body occurs, the vibration condition of the inner part of the tire body is abnormal, so that the tire running test can be stopped when the quality loss of the inner part of the tire body just occurs (namely the inner part of the tire body has initial quality loss), the expansion of the quality loss of the inner part of the tire can be reduced compared with the prior art, for example, the expansion of the quality loss of the inner part of the tire from a point to a surface can be reduced, therefore, the initial quality loss position can be determined on the quality loss of one point, and the accuracy of the determined initial quality loss position is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flowchart of a control method for a tire running test according to an embodiment of the present invention;
FIG. 2 is a graph of vibration parameter relationships provided by an embodiment of the present invention;
FIG. 3 is a diagram showing the relationship between the abnormal internal vibration of the tire casing and a preset threshold value according to the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a control system for a tire running test according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a conversion module according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a control module according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a control device for a tire running test according to an embodiment of the present invention.
Detailed Description
The existing tire running test is stopped after a tire is deflated, and at the moment, the quality loss occurs in the tire body of the tire for a period of time, which means that the quality loss in the tire body of the tire is already damaged from one point to one surface, so that the position of the central point of the surface where the quality loss exists can be determined as an initial quality loss position when the tire running test is stopped, but because the quality loss is already damaged from the point to the surface when the tire running test is stopped, whether the position of the central point of the surface is the initial quality loss position cannot be determined, and therefore the existing tire running test cannot accurately determine the initial quality loss position.
The control method and the control device for the tire running test can stop the tire running test when the quality loss just occurs in the tire body (namely the initial quality loss exists in the tire body), reduce the possibility of the quality loss expansion in the tire body, and can determine the initial quality loss position on the quality loss of one point and improve the accuracy of the determined initial quality loss position if the tire running test is stopped under the condition that the quality loss in the tire body of the tire is not expanded from the point to the surface compared with the prior art.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a flow chart of a method for controlling a running tire test according to an embodiment of the present invention is shown, for controlling the running tire test, wherein the method for controlling the running tire test shown in fig. 1 may include the following steps:
and S101, obtaining a simulation signal obtained in the process of a tire running test, wherein the tire running test refers to a test that a tire rotates at a high speed under a certain load. A corresponding feasible way to obtain the analog signal obtained during the tire running test is: a certain load is applied to the tire (the applied load is determined according to actual conditions), the tire is rotated at a high speed under the condition of bearing the certain load, signals generated when the tire rotates are collected through a sensor, and simulation signals of a tire running test are obtained through the sensor.
For example, a tire is mounted on a holder, the holder applies a load to the tire to enable the tire to be tightly attached to a rotator, the rotator drives the tire to rotate to run at a high speed, and analog signals in a tire running test are collected through a sensor, wherein the holder can be but is not limited to a stand, and the rotator can be but is not limited to a hub.
Specific implementations in tire running tests may be, but are not limited to: the tire is arranged on the base, the base adds load to the tire to enable the tire to be tightly attached to the hub, the hub drives the tire to rotate at a high speed, and the acceleration sensor obtains an analog signal in a tire running test, wherein the analog signal can be but is not limited to an acceleration signal. The magnitude of the load applied by the base to the tire depends on the specific application of the tire, for example, if the tire is used on a heavy truck, the magnitude of the applied load should be larger, and if the tire is used on a domestic automobile, the magnitude of the applied load should be smaller.
And S102, converting the analog signals into a vibration parameter relation graph, wherein the vibration parameter relation graph is used for representing the inner vibration condition of a tire body of the tire in a tire running test. That is, parameters indicating the vibration condition inside the tire body can be extracted from the analog signals, and a vibration parameter relation graph is obtained based on the extracted parameters.
In this embodiment, one possible way to convert the analog signal into the vibration parameter relation graph is: converting the analog signal into a digital signal; the method comprises the steps of extracting a plurality of values of a first parameter and a plurality of values of a second parameter from a digital signal, taking the first parameter as a vertical coordinate and the second parameter as a horizontal coordinate, and obtaining a vibration parameter relation graph based on the plurality of values of the first parameter and the plurality of values of the second parameter, wherein any one of the plurality of values of the second parameter corresponds to one of the plurality of values of the first parameter, and the value of the first parameter is used for representing the internal vibration amplitude of a tire body, namely for any one of the plurality of values of the second parameter, the value corresponds to one of the first parameter, so that the plurality of values of the second parameter and the plurality of values of the first parameter have one-to-one correspondence.
The way in which the analog signal is converted to a digital signal can be implemented is: the analog signal is used as an input of the device with analog-to-digital conversion function to obtain a digital signal output by the device with analog-to-digital conversion function, for example, the device with analog-to-digital conversion function may be, but is not limited to, an analog-to-digital converter, through which the analog signal is converted into a digital signal, and how to convert the digital signal is not described here.
One possible way to extract the values of the first parameter and the values of the second parameter from the digital signal is to: transforming the digital signal, such as but not limited to fourier transforming the digital signal, to obtain a plurality of values of the first parameter and a plurality of values of the second parameter, for example, the formula for fourier transforming the digital signal is as follows:
where N is the number of discrete data in the digital signal, after Fourier transforming the digital signal, a time domain signal is converted into a frequency domain signal of which
The frequency of the frequency domain signal is regarded as a second parameter, and the frequency domain signal obtained by Fourier transform has a plurality of parameters
And each is
Corresponding to a frequency, thereby obtaining a plurality of values of the first parameter and a plurality of values of the second parameter,and a plurality of frequencies in the frequency domain signal can be regarded as vibration frequencies inside the tire body, and each corresponding frequency is
It can be used to characterize the carcass internal vibration amplitude.
Further, taking the first parameter as a vertical coordinate and the second parameter as a horizontal coordinate, that is, the first parameter is an independent variable and the second parameter is a dependent variable, and based on a plurality of values of the first parameter and a plurality of values of the second parameter, a variation relationship between the first parameter and the second parameter is obtained, and a graph showing the variation relationship can be regarded as a representation of a vibration parameter relationship graph, as shown in fig. 2, which shows a vibration parameter relationship graph provided in this embodiment.
And S103, if the abnormal situation of the internal vibration of the tire body is determined based on the vibration parameter relation graph, stopping the tire running test. If the abnormal vibration condition in the tire body is determined based on the vibration parameter relation diagram, the change of the inner part of the tire body is shown, and if the quality loss occurs, the tire running test can be stopped at the moment to determine the initial quality loss position of the tire.
In the present embodiment, one possible way to determine the abnormality of the internal vibration condition of the tire casing based on the vibration parameter map is to: and if the value of the first parameter in the vibration parameter relation graph is abnormal, determining that the vibration condition inside the tire body is abnormal, wherein the value of the first parameter is used for representing the vibration amplitude inside the tire body, and when the value of the first parameter is abnormal, the abnormal vibration condition that the vibration amplitude of the tire body is overlarge is indicated, and the situation that the quality loss occurs inside the tire body is very likely to occur due to the overlarge vibration amplitude inside the tire body, so that the tire running test is indicated to be stopped.
The way of judging whether the value of the first parameter in the vibration parameter relation graph is abnormal is: and if the value of the first parameter in the vibration parameter relation graph exceeds a preset threshold value, determining that the vibration condition inside the tire body is abnormal. It can be understood that: the preset threshold is the maximum amplitude of vibration when the inside of the tire body normally vibrates (i.e., no mass loss occurs), and if the value of the first parameter indicating the amplitude of vibration inside the tire body exceeds the preset threshold, it can be determined that the vibration condition inside the tire body is abnormal, where the preset threshold can be determined according to the actual tire condition, and the present embodiment is not limited.
In an actual test, the fact that the value of the first parameter exceeds the preset threshold may be caused by various factors such as test environment and equipment instability in the test, so as to improve test accuracy, when it is determined whether the internal vibration condition of the carcass is abnormal based on the value of the first parameter, it may be determined that the internal vibration condition of the carcass is abnormal if the values of the first parameter exceed the preset threshold, and further, it is determined that the internal vibration condition of the carcass is abnormal if a plurality of continuous values of the first parameter exceed the preset threshold, so-called the continuous values are a plurality of values of the first parameter adjacent to each other, as shown in fig. 3, 6 continuous values of the first parameter in fig. 3 exceed the preset threshold, and at this time, it is considered that the internal vibration condition of the carcass is abnormal. In fig. 2 and 3, a dashed line parallel to the abscissa represents a preset threshold, and when it is determined that the internal vibration condition of the carcass is abnormal based on a plurality of continuous values of the first parameter, the number of the plurality of continuous values is not limited in this embodiment, and may be determined according to actual requirements.
According to the technical scheme, the analog signal obtained in the tire running test process is obtained, the analog signal is converted into a vibration parameter relation graph used for representing the internal vibration condition of the tire body of the tire in the tire running test, if the internal vibration condition of the tire body is determined to be abnormal based on the vibration parameter relation graph, stopping the tire running test, thereby realizing the control of the tire running test based on the vibration condition inside the tire body, when the quality loss of the inner part of the tire body occurs, the vibration condition of the inner part of the tire body is abnormal, so that the tire running test can be stopped when the quality loss of the inner part of the tire body just occurs (namely the inner part of the tire body has initial quality loss), the expansion of the quality loss of the inner part of the tire can be reduced compared with the prior art, for example, the expansion of the quality loss of the inner part of the tire from a point to a surface can be reduced, therefore, the initial quality loss position can be determined on the quality loss of one point, and the accuracy of the determined initial quality loss position is improved.
While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
Corresponding to the above method embodiment, an embodiment of the present invention further provides a tire running test control system, a schematic structural diagram of which is shown in fig. 4, and the tire running test control system may include: the device comprises an acquisition module 11, a conversion module 12 and a control module 13.
The acquisition module 11 is used for acquiring analog signals obtained in the tire running test process. The tire running test refers to a test in which a tire rotates at a high speed under a certain load. One possible way for the corresponding acquisition module 11 to acquire the analog signal obtained in the tire running test process is: a certain load is applied to the tire (the applied load is determined according to actual conditions), the tire is rotated at a high speed under the condition of bearing the certain load, signals generated when the tire rotates are collected through a sensor, and simulation signals of a tire running test are obtained through the sensor.
For example, a tire is mounted on a holder, the holder applies a load to the tire to enable the tire to be tightly attached to a rotator, the rotator drives the tire to rotate to run at a high speed, and analog signals in a tire running test are collected through a sensor, wherein the holder can be but is not limited to a stand, and the rotator can be but is not limited to a hub.
The specific implementation manner of the acquisition module 11 in the tire running test can be, but is not limited to: the tire is arranged on the base, the base adds load to the tire to enable the tire to be tightly attached to the hub, the hub drives the tire to rotate at a high speed, and the acceleration sensor obtains an analog signal in a tire running test, wherein the analog signal can be but is not limited to an acceleration signal. The magnitude of the load applied by the base to the tire depends on the specific application of the tire, for example, if the tire is used on a heavy truck, the magnitude of the applied load should be larger, and if the tire is used on a domestic automobile, the magnitude of the applied load should be smaller.
The conversion module 12 is used for converting the analog signal into a vibration parameter relation graph, and the vibration parameter relation graph is used for representing the inner vibration condition of a tire body of the tire in a tire running test; that is, from the analog signal, a parameter indicating the vibration condition inside the tire casing can be extracted, and a vibration parameter relation graph is obtained based on the extracted parameter, wherein the structure of the conversion module 12 is as shown in fig. 5, and comprises: a conversion unit 121, an extraction unit 122, and a drawing unit 123;
the conversion unit 121 converts the analog signal into a digital signal; the extracting unit 122 extracts a plurality of values of the first parameter and a plurality of values of the second parameter from the digital signal, wherein any one of the plurality of values of the second parameter corresponds to one of the plurality of values of the first parameter, and the value of the first parameter is used for representing the inner vibration amplitude of the tire body; the drawing unit 123 obtains a vibration parameter relationship diagram based on a plurality of values of the first parameter and a plurality of values of the second parameter by using the first parameter as a vertical coordinate and the second parameter as a horizontal coordinate, wherein any one of the plurality of values of the second parameter corresponds to one of the plurality of values of the first parameter, and the value of the first parameter is used for representing the internal vibration amplitude of the tire body, that is, for any one of the plurality of values of the second parameter, the value corresponds to one of the first parameter, so that the plurality of values of the second parameter and the plurality of values of the first parameter have a one-to-one correspondence relationship.
The conversion unit 121 can convert the analog signal into a digital signal by: the analog signal is used as an input of the device with analog-to-digital conversion function to obtain a digital signal output by the device with analog-to-digital conversion function, for example, the device with analog-to-digital conversion function may be, but is not limited to, an analog-to-digital converter, through which the analog signal is converted into a digital signal, and how to convert the digital signal is not described here.
One possible way for the extraction unit 122 to extract the values of the first parameter and the values of the second parameter from the digital signal is: for the above manner of extracting the multiple values of the first parameter and the multiple values of the second parameter from the digital signal, please refer to the relevant description in the embodiment of the method, which is not described in this embodiment.
The drawing unit 123 uses the first parameter as a vertical coordinate and the second parameter as a horizontal coordinate, that is, the first parameter is an independent variable and the second parameter is a dependent variable, and obtains a variation relationship between the first parameter and the second parameter based on a plurality of values of the first parameter and a plurality of values of the second parameter.
And the control module 13 is used for stopping the tire running test if the internal vibration condition of the tire body is determined to be abnormal based on the vibration parameter relation graph. If the abnormal vibration condition in the tire body is determined based on the vibration parameter relation diagram, the change of the inner part of the tire body is shown, and if the quality loss occurs, the tire running test can be stopped at the moment to determine the initial quality loss position of the tire. As shown in fig. 6, the control module 13 includes: a tire abnormality determination unit 131 and a stop operation unit 132;
the tire anomaly determination unit 131 is configured to determine that the internal vibration condition of the tire casing is abnormal if a value of a first parameter in the vibration parameter relation diagram is abnormal, where the value of the first parameter is used to represent the internal vibration amplitude of the tire casing; when the value of the first parameter is abnormal, the operation stopping unit 132 indicates that an abnormal vibration condition that the vibration amplitude of the tire body is too large exists, and the too large vibration amplitude inside the tire body is very likely to cause quality loss inside the tire body, thereby indicating that the tire running test is stopped.
The manner in which the tire abnormality determining unit 131 determines whether the value of the first parameter in the vibration parameter relationship diagram is abnormal may be: and if the value of the first parameter in the vibration parameter relation graph exceeds a preset threshold value, determining that the vibration condition inside the tire body is abnormal. It can be understood that the preset threshold is the maximum amplitude of the vibration when the inside of the tire body normally vibrates (i.e., no mass loss occurs), and if the value of the first parameter indicating the amplitude of the vibration inside the tire body exceeds the preset threshold, it may be determined that the vibration condition inside the tire body is abnormal, where the preset threshold may be determined according to the actual tire condition, and the present embodiment is not limited thereto.
In an actual test, the fact that the value of the first parameter exceeds the preset threshold may be caused by various factors such as test environment and equipment instability in the test, so as to improve test accuracy, when it is determined whether the internal vibration condition of the carcass is abnormal based on the value of the first parameter, it may be determined that the internal vibration condition of the carcass is abnormal if the values of the first parameter exceed the preset threshold, and further, it is determined that the internal vibration condition of the carcass is abnormal if a plurality of continuous values of the first parameter exceed the preset threshold, so-called the continuous values are a plurality of values of the first parameter adjacent to each other, as shown in fig. 3, 6 continuous values of the first parameter in fig. 3 exceed the preset threshold, and at this time, it is considered that the internal vibration condition of the carcass is abnormal. In fig. 2 and 3, a dashed line parallel to the abscissa represents a preset threshold, and when it is determined that the internal vibration condition of the carcass is abnormal based on a plurality of continuous values of the first parameter, the number of the plurality of continuous values is not limited in this embodiment, and may be determined according to actual requirements.
According to the technical scheme, the analog signal obtained in the tire running test process is obtained, the analog signal is converted into a vibration parameter relation graph used for representing the internal vibration condition of the tire body of the tire in the tire running test, if the internal vibration condition of the tire body is determined to be abnormal based on the vibration parameter relation graph, stopping the tire running test, thereby realizing the control of the tire running test based on the vibration condition inside the tire body, when the quality loss of the inner part of the tire body occurs, the vibration condition of the inner part of the tire body is abnormal, so that the tire running test can be stopped when the quality loss of the inner part of the tire body just occurs (namely the inner part of the tire body has initial quality loss), the expansion of the quality loss of the inner part of the tire can be reduced compared with the prior art, for example, the expansion of the quality loss of the inner part of the tire from a point to a surface can be reduced, therefore, the initial quality loss position can be determined on the quality loss of one point, and the accuracy of the determined initial quality loss position is improved.
Corresponding to the above method embodiment, an embodiment of the present invention further provides a tire running test control apparatus, which may include: the device comprises a fixer, a rotator, a signal obtainer and a controller.
A holder for fixing the tire and applying a load to the tire;
a rotator for rotating the tire so that the tire rotates at a high speed with a certain load applied thereto (the applied load is determined according to actual circumstances).
And the signal acquirer is used for acquiring the analog signal obtained in the tire running test process and sending the signal to the controller.
And the controller is used for converting the analog signal into a vibration parameter relation diagram, stopping the tire running test if the internal vibration condition of the tire is determined to be abnormal based on the vibration parameter relation diagram, wherein the vibration parameter relation diagram is used for representing the internal vibration condition of the tire body of the tire in the tire running test, and the specific description of the controller can refer to the related description in the method embodiment, which is not described again.
In the present embodiment, the connection relationship of the respective devices is as follows:
the rotator is not in close contact with the fixer, and the distance between the rotator and the fixer is less than the distance of the radius of the tire, so that the tire is in close contact with the rotator, and the tire can be driven by the rotator to rotate; the fixer is connected with the signal acquirer, so that the signal acquirer acquires analog signals obtained in the tire running test process. The signal obtainer is connected to the controller so that the controller can control the tire running test based on the analog signal.
The fixer can be but is not limited to a base, the rotator can be but is not limited to a hub, the signal obtainer can be but is not limited to an acceleration sensor, the controller can be but is not limited to a computer and a signal collector, as shown in fig. 7, the connection relationship of each device is as follows:
the base is not in close contact with the hub, and the distance between the hub and the base is smaller than the distance of the radius of the tire, so that the tire is driven to rotate when the tire contacts the hub; the machine base applies a load to the tire, and in the tire running test: the tire is arranged on the base, the base adds load to the tire to enable the tire to be tightly attached to the hub, and the tire is driven to rotate at a high speed through the hub, wherein the size of the load applied to the tire by the base is determined according to the specific use occasion of the tire, for example, the size of the applied load is larger when the tire is used on a heavy truck, and the size of the applied load is smaller when the tire is used on a domestic automobile.
The acceleration sensor is fixed on the base, so that the acceleration sensor can obtain an analog signal in the tire running test process, the signal collector converts the analog signal into a digital signal, extracts a first parameter and a second parameter from the digital signal and sends the first parameter and the second parameter to the computer, the computer obtains a vibration parameter relation diagram based on the first parameter and the second parameter, and the tire running test is controlled by determining the internal vibration condition of the tire based on the vibration parameter relation diagram.
According to the technical scheme, the analog signal obtained in the tire running test process is obtained, the analog signal is converted into a vibration parameter relation graph used for representing the internal vibration condition of the tire body of the tire in the tire running test, if the internal vibration condition of the tire body is determined to be abnormal based on the vibration parameter relation graph, stopping the tire running test, thereby realizing the control of the tire running test based on the vibration condition inside the tire body, when the quality loss of the inner part of the tire body occurs, the vibration condition of the inner part of the tire body is abnormal, so that the tire running test can be stopped when the quality loss of the inner part of the tire body just occurs (namely the inner part of the tire body has initial quality loss), the expansion of the quality loss of the inner part of the tire can be reduced compared with the prior art, for example, the expansion of the quality loss of the inner part of the tire from a point to a surface can be reduced, therefore, the initial quality loss position can be determined on the quality loss of one point, and the accuracy of the determined initial quality loss position is improved.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method of controlling a running test of a tire, the method comprising:
obtaining an analog signal obtained in the tire running test process, wherein the analog signal is obtained by a signal obtaining device which is connected with a fixer and is not arranged on a tire, and the fixer is used for fixing the tire;
converting the analog signal into a vibration parameter relation graph, wherein the vibration parameter relation graph is used for representing the relation between the vibration frequency inside the tire body and the vibration amplitude inside the tire body, and the vibration condition inside the tire body of the tire in the tire running test is obtained through the relation between the vibration frequency inside the tire body and the vibration amplitude inside the tire body;
and if the internal vibration condition of the tire body is determined to be abnormal based on the vibration parameter relation diagram, stopping the tire running test, wherein the abnormal internal vibration condition of the tire body indicates that the quality loss of one point occurs in the tire body, and determining the initial quality loss position on the quality loss of the point so as to stop the tire running test before the quality loss of the internal portion of the tire body is enlarged to the quality loss of the surface.
2. The method according to claim 1, wherein the stopping the tire running test if it is determined that the vibration condition inside the tire casing is abnormal based on the vibration parameter map comprises:
if the value of the first parameter in the vibration parameter relation graph is abnormal, determining that the internal vibration condition of the tire body is abnormal, wherein the value of the first parameter is used for representing the internal vibration amplitude of the tire body;
and stopping the tire running test when the vibration condition inside the tire body is abnormal.
3. The method according to claim 2, wherein if the value of the first parameter in the vibration parameter relation diagram is abnormal, determining that the internal vibration condition of the tire casing is abnormal comprises:
and if the value of the first parameter in the vibration parameter relation graph exceeds a preset threshold value, determining that the internal vibration condition of the tire body is abnormal.
4. The method of claim 1, wherein said converting said analog signal to a vibration parameter map comprises:
converting the analog signal to a digital signal;
extracting a plurality of values of a first parameter and a plurality of values of a second parameter from the digital signal, wherein any one of the plurality of values of the second parameter corresponds to one of the plurality of values of the first parameter, and the value of the first parameter is used for representing the inner vibration amplitude of the tire body;
and taking the first parameter as a vertical coordinate, taking the second parameter as a horizontal coordinate, and obtaining the vibration parameter relation graph based on the plurality of values of the first parameter and the plurality of values of the second parameter.
5. A control system for a tire running test, the system comprising: the device comprises an acquisition module, a conversion module and a control module;
the acquisition module is used for acquiring an analog signal obtained in the tire running test process, the analog signal is acquired by a signal acquirer which is connected with a fixer and is not arranged on a tire, and the fixer is used for fixing the tire;
the conversion module is used for converting the analog signal into a vibration parameter relation graph, and the vibration parameter relation graph is used for representing the relation between the vibration frequency inside the tire body and the vibration amplitude inside the tire body so as to obtain the tire body internal vibration condition of the tire in the tire running test through the relation between the vibration frequency inside the tire body and the vibration amplitude inside the tire body;
and the control module is used for stopping the tire running test if the internal vibration condition of the tire body is determined to be abnormal based on the vibration parameter relation diagram, the internal vibration condition of the tire body indicates that the quality loss of one point occurs in the tire body, and the initial quality loss position is determined on the quality loss of the point so as to stop the tire running test before the quality loss of the internal portion of the tire body is enlarged to the quality loss of the surface.
6. The system of claim 5, wherein the control module comprises: determining a tire abnormality unit and a stop operation unit;
the tire abnormity determining unit is used for determining that the internal vibration condition of the tire body is abnormal if the value of a first parameter in the vibration parameter relation diagram is abnormal, wherein the value of the first parameter is used for representing the internal vibration amplitude of the tire body;
and the running stopping unit is used for stopping the tire running test under the condition that the vibration condition inside the tire body is abnormal.
7. The system according to claim 6, wherein the tire abnormality determining unit is configured to determine that the tire body internal vibration condition is abnormal if a value of the first parameter in the vibration parameter relationship diagram exceeds a preset threshold.
8. The system of claim 5, wherein the conversion module comprises: a conversion unit, an extraction unit and a drawing unit;
the conversion unit is used for converting the analog signal into a digital signal;
the extraction unit is used for extracting a plurality of values of a first parameter and a plurality of values of a second parameter from the digital signal, wherein any one of the plurality of values of the second parameter corresponds to one of the plurality of values of the first parameter, and the value of the first parameter is used for representing the internal vibration amplitude of the tire body;
the drawing unit is used for taking the first parameter as a vertical coordinate, taking the second parameter as a horizontal coordinate, and obtaining the vibration parameter relation graph based on a plurality of values of the first parameter and a plurality of values of the second parameter.
9. A control apparatus for a tire running test, the apparatus comprising: the device comprises a fixer, a rotator, a signal acquirer and a controller;
the fixer is used for fixing the tire and applying load to the tire;
the rotator is used for rotating the tire;
the signal acquirer is used for acquiring an analog signal obtained in the tire running test process and sending the analog signal to the controller, and the signal acquirer is connected with the fixer and is not arranged on the tire;
the controller is used for converting the analog signal into a vibration parameter relation graph, if the internal vibration condition of the tire body is determined to be abnormal based on the vibration parameter relation graph, the tire walking test is stopped, the vibration parameter relation graph is used for representing the relation between the internal vibration frequency of the tire body and the internal vibration amplitude of the tire body, so that the internal vibration frequency of the tire body and the internal vibration amplitude of the tire body are passed through, the internal vibration condition of the tire body abnormally indicates that the internal quality of the tire body is damaged at one point, and the initial quality damage position is determined on the quality damage of the point, so that the internal quality damage of the tire body is stopped before the quality damage of the surface is enlarged.
10. The apparatus of claim 9, wherein the holder, the rotator, the signal obtainer, and the controller are connected as follows:
the rotator and the holder are not in close contact, and the distance between the rotator and the holder is smaller than the radius of the tire;
the signal obtainer is connected with the controller.
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| CN103068597A (en) * | 2010-06-24 | 2013-04-24 | 株式会社普利司通 | Tire internal failure determination method |
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| JPS61160035A (en) * | 1985-01-09 | 1986-07-19 | Yokohama Rubber Co Ltd:The | Method for stop control of set position in uniformity machine |
| ATE458989T1 (en) * | 2000-06-08 | 2010-03-15 | Bridgestone Firestone North Am | DYNAMIC FORCE MEASURING SYSTEM FOR TIRE TEST STATION |
| ES2552509T3 (en) * | 2001-12-21 | 2015-11-30 | Kabushiki Kaisha Bridgestone | Method and apparatus for estimating the conditions of a road and the running state of a tire, ABS and car control using them |
| US6915684B2 (en) * | 2002-04-22 | 2005-07-12 | Illinois Tool Works, Inc. | Tire uniformity testing |
| WO2009008502A1 (en) * | 2007-07-11 | 2009-01-15 | Kabushiki Kaisha Bridgestone | Tire wear estimating method |
| EP2301769B1 (en) * | 2008-06-25 | 2017-01-11 | Kabushiki Kaisha Bridgestone | Method for estimating tire wear and device for estimating tire wear |
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| CN103068597A (en) * | 2010-06-24 | 2013-04-24 | 株式会社普利司通 | Tire internal failure determination method |
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