CN114851786A - Intelligent tire eccentric wear early warning method and device - Google Patents
Intelligent tire eccentric wear early warning method and device Download PDFInfo
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- CN114851786A CN114851786A CN202210477611.XA CN202210477611A CN114851786A CN 114851786 A CN114851786 A CN 114851786A CN 202210477611 A CN202210477611 A CN 202210477611A CN 114851786 A CN114851786 A CN 114851786A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/06—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle
- B60C23/066—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle by monitoring wheel-centre to ground distance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/06—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle
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- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses an intelligent tire eccentric wear early warning method and device, wherein the method comprises the following steps: acquiring a driving deviation D1 from a first position point to a second position point and a distance S1 between the first position point and the second position point in the process of straight driving of an automobile on a road, wherein the driving deviation D1 is a difference value between a theoretical driving distance corresponding to the actual revolution of a first intelligent tire and the distance S1 between the first position point and the second position point, calculating a real-time wheel diameter R1 of the first intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, and performing tire eccentric wear early warning according to a difference value between the real-time wheel diameter R1 of the first intelligent tire and the wheel diameter R of a second intelligent tire of the first intelligent tire side by side. The data monitored by the invention has accuracy, the danger of tire burst caused by tire eccentric wear is prevented, the probability of traffic accidents is reduced, and the fuel efficiency is improved.
Description
Technical Field
The invention relates to the technical field of tires, in particular to an intelligent tire eccentric wear early warning method and device.
Background
As an important automobile part, a tire has been an indispensable component for safe driving of an automobile. The tire burst caused by abnormal tire pressure, damaged outer edge of the tire, damaged side wall, eccentric wear of the tire and the like of the automobile tire occurs. When the automobile runs at a high speed in a straight line, the tire burst can cause huge safety accidents to the automobile, and huge loss of personnel and property is caused. Whether the tire on the vehicle generates the eccentric wear or not is taken as important parameter information of safe running of the vehicle, and the health states of the tire outer edge thickness, the sidewall integrity and the like can only be detected before running or during maintenance, so that the eccentric wear condition of the tire cannot be monitored in the running process.
The tire eccentric wear refers to the unilateral wear of the tire caused by external reasons such as four-wheel positioning, tire installation, unbalanced cargo loading and the like in the use process of the tire. The main expression is that the pattern height of the single tyre is worn unevenly, wherein one side of the pattern is rapidly reduced, and the other side of the pattern is worn inconspicuously. Or wavy wear, block wear, etc.! Another is that of one-sided wear of the tires, which is often found on heavy trucks, where the rear axle is normally two wheels side by side, with one tire having a pattern that decreases rapidly compared to the other.
The conventional vehicle safety driving state monitoring mainly aims at monitoring the tire pressure of a tire in real time, and reports the tire pressure information to a vehicle controller or a driver, but cannot monitor whether the tire is eccentric wear or not in real time, so that how to monitor whether the tire is eccentric wear or not in real time and replace the tire in time is a technical problem which needs to be solved by a person skilled in the art urgently.
Disclosure of Invention
The invention aims to provide an intelligent tire eccentric wear early warning method and device, the intelligent tire eccentric wear early warning method and device provided by the invention have the function of monitoring whether the intelligent tire is eccentric wear or not in real time, different levels of eccentric wear early warning are carried out on the tire according to different eccentric wear conditions, whether the tire needs to be replaced or not is judged according to the early warning levels, and the monitored data have accuracy and rich application scenes.
The invention improves the problems that in the prior art, when an automobile runs at a high speed in a straight line, whether the tire is eccentrically worn or not cannot be monitored in real time, so that four-wheel positioning parameters are inaccurate, the danger of tire burst caused by eccentric wear of the tire, steering wheel trembling and deviation are prevented, a driver can feel tired when driving, and the probability of traffic accidents and the problem of increased oil consumption are increased.
The invention improves the detection mode that the eccentric wear tire replacement depends on maintenance in the prior art, judges the eccentric wear condition of the tire through monitoring the tire in real time according to the real-time wheel diameter of the tire, carries out different levels of eccentric wear early warning on the tire according to different eccentric wear conditions, and judges whether the tire needs to be replaced according to the early warning level.
In order to achieve the purpose, the invention provides the following technical scheme:
an intelligent tire eccentric wear early warning method comprises the following steps:
acquiring a driving deviation D1 from a first position point to a second position point and a distance S1 between the first position point and the second position point in the process of straight driving of the automobile on a road, wherein the driving deviation D1 is a difference value between a theoretical driving distance corresponding to the actual revolution number of the first intelligent tire and the distance S1 between the first position point and the second position point;
calculating the real-time wheel diameter R1 of the first intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, and performing tire eccentric wear early warning according to the difference value of the real-time wheel diameter R1 of the first intelligent tire and the wheel diameter R of a second intelligent tire of the first intelligent tire side by side, wherein the tire eccentric wear early warning grade is divided into from high to low: a third-level eccentric wear early warning, a second-level eccentric wear early warning and a first-level eccentric wear early warning;
when the real-time wheel diameter R1 of the intelligent tire is less than or equal to 0.8R, setting the tire eccentric wear early warning level as the three-level eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.8R and less than or equal to R1 and less than or equal to 0.9R, setting the tire eccentric wear early warning level as the secondary eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.9R and less than R1 and less than or equal to R, setting the tire eccentric wear early warning level as the primary eccentric wear early warning;
judging whether the tire needs to be replaced according to the tire eccentric wear early warning level;
further, whether need change the tire through judging according to different early warning grades is in order to prevent that the tire eccentric wear from leading to the reduction of wheel footpath to exceed the highest bearing pressure of tire pressure for the tire blows out, and when the eccentric wear leads to the reduction in wheel footpath scope not big, need not change the tire, can continue to travel under the normal condition of assurance tire pressure, avoids leading to frequently changing the tire because of the tire eccentric wear, produces the excessive waste of tire.
Wherein obtaining the distance S1 between the first location point and the second location point comprises:
acquiring the position information of the first position point and acquiring the position information of the second position point;
determining a distance S1 between the first location point and the second location point according to the location information of the first location point and the location information of the second location point.
Furthermore, the position information of the first position point is obtained through the accurate positioning of the radar, the position information of the second position point is obtained, the accuracy of the positioning of the position information can be realized according to the accurate positioning of the radar, and the distance S1 between the first position point and the second position point is more accurate in distance measurement.
In some embodiments of the present application, obtaining the driving deviation D1 of the intelligent tire from the first position point to the second position point during the straight driving process comprises:
acquiring a road marking image on a road surface;
correcting the acquired road marking image, and carrying out adaptive median spatial filtering and denoising on the corrected road marking image to reduce image noise;
and (3) segmenting the road marking image through a depth convolution network model to obtain the distance between adjacent road markings of the image as a standard path, and obtaining the driving deviation D1 through coordinate conversion.
Further, the road marking image is subjected to segmentation processing for segmenting the image into a plurality of regions according to different properties of pixels, the segmentation is performed for extracting distance information of road markings adjacent to the image for analysis, and since the road markings have high accuracy, the accuracy of the obtained driving deviation D1 can be improved according to the road markings.
In some embodiments of the present application, calculating the real-time wheel diameter R1 of the smart tire according to the distance S1 between the first position point and the second position point and the driving deviation D1 includes:
calculating a unit distance driving deviation of the first smart tire according to the distance S1 between the first position point and the second position point and the driving deviation D1;
obtaining a wheel diameter compensation value corresponding to the unit distance running deviation of the first intelligent tire according to a preset wheel diameter compensation value;
and obtaining the real-time wheel diameter R1 of the first intelligent tire according to the wheel diameter compensation value.
In some embodiments of the present application, calculating the real-time wheel diameter R1 of the smart tire according to the distance S1 between the first position point and the second position point and the driving deviation D1 includes:
determining the number of turns of the first intelligent tire according to the distance S1 between the first position point and the second position point and the real-time wheel diameter R1 of the first intelligent tire;
determining the number of turns of the second intelligent tire according to the distance S1 between the first position point and the second position point, the driving deviation D1 and the real-time wheel diameter R1 of the first intelligent tire;
and calculating to obtain the eccentric wear difference value of the first intelligent tire and the second intelligent tire according to the relation that the rotation turns of the first intelligent tire are equal to the rotation turns of the second intelligent tire.
In some embodiments of the present application, determining whether a tire needs to be replaced according to the tire eccentric wear warning level includes:
when the tire eccentric wear early warning is the three-level eccentric wear early warning, determining that the first intelligent tire needs to be replaced;
when the tire eccentric wear early warning is the secondary eccentric wear early warning, judging whether the real-time wheel diameter R1 reaches a preset wheel diameter range, and if so, determining that the first intelligent tire needs to be replaced;
or when the tire eccentric wear early warning is the secondary eccentric wear early warning, judging whether the difference value between the real-time wheel diameter R1 and the standard wheel diameter R of the intelligent tire reaches a preset difference value threshold value, and if so, determining that the first intelligent tire needs to be replaced;
and when the tire eccentric wear early warning is the primary eccentric wear early warning, determining that the first intelligent tire does not need to be replaced.
In order to achieve the above object, the present invention further provides an intelligent tire eccentric wear early warning device, comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a driving deviation D1 of the automobile from a first position point to a second position point in the straight driving process on the road and a distance S1 between the first position point and the second position point, and the driving deviation D1 is the difference value of a theoretical driving distance corresponding to the actual revolution of a first intelligent tire and the distance S1 between the first position point and the second position point;
the early warning module is used for calculating the real-time wheel diameter R1 of the first intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, and performing tire eccentric wear early warning according to the difference value between the real-time wheel diameter R1 of the first intelligent tire and the wheel diameter R of a second intelligent tire which is arranged side by side with the first intelligent tire, wherein the tire eccentric wear early warning grade is divided into: a third-level eccentric wear early warning, a second-level eccentric wear early warning and a first-level eccentric wear early warning;
when the real-time wheel diameter R1 of the intelligent tire is less than or equal to 0.8R, the tire eccentric wear early warning grade is the three-level eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.8R and less than or equal to R1 and less than or equal to 0.9R, the tire eccentric wear early warning level is the secondary eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.9R and less than R1 and less than or equal to R, the tire eccentric wear early warning level is the primary eccentric wear early warning;
the judging module is used for judging whether the tire needs to be replaced according to the tire eccentric wear early warning level;
the acquisition module is further configured to acquire the position information of the first position point and acquire the position information of the second position point;
determining a distance S1 between the first location point and the second location point according to the location information of the first location point and the location information of the second location point.
In some embodiments of the present application, the obtaining module includes:
the image acquisition module is used for acquiring a road marking image on a road surface;
the image processing module is used for correcting the acquired road marking image, and carrying out adaptive median spatial filtering and denoising on the corrected road marking image to reduce image noise points;
and the image calculation module is used for segmenting the road marking image through a depth convolution network model to obtain the distance between adjacent road markings of the image as a standard path, and obtaining the driving deviation D1 through coordinate conversion.
In some embodiments of the present application, the obtaining module includes:
a deviation calculating unit for calculating a unit distance driving deviation of the first smart tire according to the distance S1 between the first position point and the second position point and the driving deviation D1;
the wheel diameter compensation value determining unit is used for obtaining a wheel diameter compensation value corresponding to the unit distance running deviation of the first intelligent tire according to a preset wheel diameter compensation value;
and the real-time wheel diameter determining unit is used for obtaining the real-time wheel diameter R1 of the first intelligent tire according to the wheel diameter compensation value.
In some embodiments of the present application, the obtaining module further includes:
a first determining unit, configured to determine a number of rotations of the first smart tire according to a distance S1 between the first location point and the second location point and a real-time wheel diameter R1 of the first smart tire;
a second determination unit, configured to determine a rotation number of the second smart tire according to a distance S1 between the first location point and the second location point, the driving deviation D1, and a real-time wheel diameter R1 of the first smart tire;
and the eccentric wear calculation unit is used for calculating the eccentric wear difference value of the first intelligent tire and the second intelligent tire according to the relation that the rotation turns of the first intelligent tire are equal to the rotation turns of the second intelligent tire.
In some embodiments of the present application, the determining module includes:
the first judgment unit is used for determining that the first intelligent tire needs to be replaced when the tire eccentric wear early warning is the three-level eccentric wear early warning;
the second judging unit is used for judging whether the real-time wheel diameter R1 reaches a preset wheel diameter range or not when the tire eccentric wear early warning is the secondary eccentric wear early warning, and if so, determining that the first intelligent tire needs to be replaced;
or, when the tire eccentric wear early warning is the secondary eccentric wear early warning, judging whether the difference value between the real-time wheel diameter R1 and the standard wheel diameter R of the intelligent tire reaches a preset difference threshold value, and if so, determining that the first intelligent tire needs to be replaced;
and the third judgment unit is used for determining that the first intelligent tire does not need to be replaced when the tire eccentric wear early warning is the primary eccentric wear early warning.
The invention provides an intelligent tire eccentric wear early warning method and device, compared with the prior art, the intelligent tire eccentric wear early warning method and device have the beneficial effects that:
when the automobile runs at a high speed in a straight line, the tire is monitored in real time, the eccentric wear condition of the tire is judged according to the real-time wheel diameter of the tire, the eccentric wear early warning of different levels is carried out on the tire according to different eccentric wear conditions, and whether the tire needs to be replaced is judged according to the early warning level. The invention has the function of monitoring whether the tire is eccentrically worn in real time, prevents the tire burst danger caused by the eccentric wear of the tire, reduces the probability of traffic accidents and improves the fuel efficiency.
Drawings
FIG. 1 is a flow chart of an intelligent tire eccentric wear warning method of the present invention;
fig. 2 is a functional block diagram of the intelligent tire eccentric wear early warning device of the invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected to each other through an intermediate member. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The tire eccentric wear refers to the unilateral wear of the tire caused by external reasons such as four-wheel positioning, tire installation, unbalanced cargo loading and the like in the use process of the tire. The main expression is that the pattern height of the single tyre is worn unevenly, wherein one side of the pattern is rapidly reduced, and the other side of the pattern is worn inconspicuously. Or wavy wear, block wear, etc.! Another is that of one-sided wear of the tires, which is often found on heavy trucks, where the rear axle is normally two wheels side by side, with one tire having a pattern that decreases rapidly compared to the other.
The conventional vehicle safety driving state monitoring mainly aims at monitoring the tire pressure of a tire in real time, and reports the tire pressure information to a vehicle controller or a driver, but cannot monitor whether the tire is eccentric wear or not in real time, so that how to monitor whether the tire is eccentric wear or not in real time and replace the tire in time is a technical problem which needs to be solved by a person skilled in the art urgently.
Referring to fig. 1, the disclosed embodiment of the present invention provides an intelligent tire eccentric wear warning method, including the following steps:
acquiring a driving deviation D1 from a first position point to a second position point and a distance S1 between the first position point and the second position point in the process that the automobile is driven on a straight line on a road, wherein the driving deviation D1 is a difference value between a theoretical driving distance corresponding to the actual revolution of the first intelligent tire and the distance S1 between the first position point and the second position point;
calculating the real-time wheel diameter R1 of the first intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, and carrying out tire eccentric wear early warning according to the difference value between the real-time wheel diameter R1 of the first intelligent tire and the wheel diameter R of the second intelligent tire of the first intelligent tire side by side, wherein the tire eccentric wear early warning grade is divided into from high to low: a third-level eccentric wear early warning, a second-level eccentric wear early warning and a first-level eccentric wear early warning;
when the real-time wheel diameter R1 of the intelligent tire is less than or equal to 0.8R, setting the tire eccentric wear early warning level as the three-level eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.8R and less than or equal to R1 and less than or equal to 0.9R, setting the tire eccentric wear early warning level as the secondary eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.9R and less than R1 and less than or equal to R, setting the tire eccentric wear early warning level as the primary eccentric wear early warning;
judging whether the tire needs to be replaced according to the tire eccentric wear early warning level;
wherein obtaining the distance S1 between the first location point and the second location point comprises:
acquiring the position information of the first position point and acquiring the position information of the second position point;
the distance between the first position point and the second position point is determined based on the position information of the first position point and the position information of the second position point S1.
Acquiring a driving deviation D1 of the intelligent tire from a first position point to a second position point in a straight driving process, wherein the method comprises the following steps:
acquiring a road marking image on a road surface;
correcting the acquired road marking image, and carrying out adaptive median spatial filtering and denoising on the corrected road marking image to reduce image noise points;
and (3) segmenting the road marking image through a depth convolution network model to obtain the distance between adjacent road markings of the image as a standard path, and obtaining the driving deviation D1 through coordinate conversion.
Calculating the real-time wheel diameter R1 of the intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, wherein the method comprises the following steps:
calculating a unit distance driving deviation of the first smart tire according to the distance S1 between the first position point and the second position point and the driving deviation D1;
obtaining a wheel diameter compensation value corresponding to the unit distance running deviation of the first intelligent tire according to a preset wheel diameter compensation value;
and obtaining the real-time wheel diameter R1 of the first intelligent tire according to the wheel diameter compensation value.
Calculating the real-time wheel diameter R1 of the intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, wherein the method comprises the following steps:
determining the number of turns of the first intelligent tire according to the distance S1 between the first position point and the second position point and the real-time wheel diameter R1 of the first intelligent tire;
determining the number of turns of the second intelligent tire according to the distance S1 between the first position point and the second position point, the driving deviation D1 and the real-time wheel diameter R1 of the first intelligent tire;
and calculating to obtain the eccentric wear difference value of the first intelligent tire and the second intelligent tire according to the relation that the rotation turns of the first intelligent tire are equal to the rotation turns of the second intelligent tire.
Whether need change tire according to tire eccentric wear early warning grade judgement includes:
when the tire eccentric wear early warning is a three-level eccentric wear early warning, determining that the first intelligent tire needs to be replaced;
when the tire eccentric wear early warning is a secondary eccentric wear early warning, judging whether the size of the real-time wheel diameter R1 reaches a preset wheel diameter range, and if so, determining that the first intelligent tire needs to be replaced;
or when the tire eccentric wear early warning is a secondary eccentric wear early warning, judging whether the difference value between the real-time wheel diameter R1 and the standard wheel diameter R of the intelligent tire reaches a preset difference value threshold value, and if so, determining that the first intelligent tire needs to be replaced;
and when the tire eccentric wear early warning is the primary eccentric wear early warning, determining that the first intelligent tire does not need to be replaced.
In one embodiment of the application, a driving deviation D1 of the automobile from a first position point to a second position point during straight driving on a road and a distance S1 between the first position point and the second position point are obtained, wherein the driving deviation D1 is a difference value between a theoretical driving distance corresponding to an actual revolution number of the first intelligent tire and a distance S1 between the first position point and the second position point;
calculating the real-time wheel diameter R1 of the first intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, and carrying out tire eccentric wear early warning according to the difference value between the real-time wheel diameter R1 of the first intelligent tire and the wheel diameter R of the second intelligent tire of the first intelligent tire side by side, wherein the tire eccentric wear early warning grade is divided into from high to low: a third-level eccentric wear early warning, a second-level eccentric wear early warning and a first-level eccentric wear early warning;
when the real-time wheel diameter R1 of the intelligent tire is less than or equal to 0.8R, the tire eccentric wear early warning is a three-level eccentric wear early warning;
wherein obtaining the distance S1 between the first location point and the second location point comprises:
acquiring the position information of the first position point and acquiring the position information of the second position point;
the distance between the first position point and the second position point is determined based on the position information of the first position point and the position information of the second position point S1.
Acquiring a driving deviation D1 of the intelligent tire from a first position point to a second position point in a straight driving process, wherein the method comprises the following steps:
acquiring a road marking image on a road surface;
correcting the acquired road marking image, and carrying out adaptive median spatial filtering and denoising on the corrected road marking image to reduce image noise points;
and (3) segmenting the road marking image through a depth convolution network model to obtain the distance between adjacent road markings of the image as a standard path, and performing coordinate conversion to obtain the driving deviation D1.
Calculating the real-time wheel diameter R1 of the intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, wherein the method comprises the following steps:
calculating a unit distance driving deviation of the first smart tire according to the distance S1 between the first position point and the second position point and the driving deviation D1;
obtaining a wheel diameter compensation value corresponding to the unit distance running deviation of the first intelligent tire according to a preset wheel diameter compensation value;
and obtaining the real-time wheel diameter R1 of the first intelligent tire according to the wheel diameter compensation value.
Calculating the real-time wheel diameter R1 of the intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, wherein the method comprises the following steps:
determining the number of turns of the first intelligent tire according to the distance S1 between the first position point and the second position point and the real-time wheel diameter R1 of the first intelligent tire;
determining the number of turns of the second intelligent tire according to the distance S1 between the first position point and the second position point, the driving deviation D1 and the real-time wheel diameter R1 of the first intelligent tire;
and calculating to obtain the eccentric wear difference value of the first intelligent tire and the second intelligent tire according to the relation that the rotation turns of the first intelligent tire are equal to the rotation turns of the second intelligent tire.
Whether need change tire according to tire eccentric wear early warning grade judgement includes:
and when the tire eccentric wear early warning is a three-level eccentric wear early warning, determining that the first intelligent tire needs to be replaced.
In one embodiment of the application, a driving deviation D1 of the automobile from a first position point to a second position point during straight driving on a road and a distance S1 between the first position point and the second position point are obtained, wherein the driving deviation D1 is a difference value between a theoretical driving distance corresponding to an actual revolution number of the first intelligent tire and a distance S1 between the first position point and the second position point;
calculating the real-time wheel diameter R1 of the first intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, and carrying out tire eccentric wear early warning according to the difference value between the real-time wheel diameter R1 of the first intelligent tire and the wheel diameter R of the second intelligent tire of the first intelligent tire side by side, wherein the tire eccentric wear early warning grade is divided into from high to low: a third-level eccentric wear early warning, a second-level eccentric wear early warning and a first-level eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.8R and less than R1 and less than or equal to 0.9R, the tire eccentric wear early warning is a secondary eccentric wear early warning;
wherein obtaining the distance S1 between the first location point and the second location point comprises:
acquiring the position information of the first position point and acquiring the position information of the second position point;
the distance between the first position point and the second position point is determined based on the position information of the first position point and the position information of the second position point S1.
Acquiring a driving deviation D1 of the intelligent tire from a first position point to a second position point in a straight driving process, wherein the method comprises the following steps:
acquiring a road marking image on a road surface;
correcting the acquired road marking image, and carrying out adaptive median spatial filtering and denoising on the corrected road marking image to reduce image noise points;
and (3) segmenting the road marking image through a depth convolution network model to obtain the distance between adjacent road markings of the image as a standard path, and obtaining the driving deviation D1 through coordinate conversion.
Calculating the real-time wheel diameter R1 of the intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, wherein the method comprises the following steps:
calculating a unit distance driving deviation of the first smart tire according to the distance S1 between the first position point and the second position point and the driving deviation D1;
obtaining a wheel diameter compensation value corresponding to the unit distance running deviation of the first intelligent tire according to a preset wheel diameter compensation value;
and obtaining the real-time wheel diameter R1 of the first intelligent tire according to the wheel diameter compensation value.
Calculating the real-time wheel diameter R1 of the intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, wherein the method comprises the following steps:
determining the number of turns of the first intelligent tire according to the distance S1 between the first position point and the second position point and the real-time wheel diameter R1 of the first intelligent tire;
determining the number of turns of the second intelligent tire according to the distance S1 between the first position point and the second position point, the driving deviation D1 and the real-time wheel diameter R1 of the first intelligent tire;
and calculating to obtain the eccentric wear difference value of the first intelligent tire and the second intelligent tire according to the relation that the rotation turns of the first intelligent tire are equal to the rotation turns of the second intelligent tire.
Whether need change tire according to tire eccentric wear early warning grade judgement includes:
when the tire eccentric wear early warning is a secondary eccentric wear early warning, judging whether the size of the real-time wheel diameter R1 reaches a preset wheel diameter range, and if so, determining that the first intelligent tire needs to be replaced;
or when the tire eccentric wear early warning is a two-stage eccentric wear early warning, judging whether the difference value between the real-time wheel diameter R1 and the standard wheel diameter R of the intelligent tire reaches a preset difference value threshold value, and if so, determining that the first intelligent tire needs to be replaced.
In one embodiment of the application, a driving deviation D1 of the automobile from a first position point to a second position point during straight driving on a road and a distance S1 between the first position point and the second position point are obtained, wherein the driving deviation D1 is a difference value between a theoretical driving distance corresponding to an actual revolution number of the first intelligent tire and a distance S1 between the first position point and the second position point;
calculating the real-time wheel diameter R1 of the first intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, and carrying out tire eccentric wear early warning according to the difference value between the real-time wheel diameter R1 of the first intelligent tire and the wheel diameter R of the second intelligent tire of the first intelligent tire side by side, wherein the tire eccentric wear early warning grade is divided into from high to low: a third-level eccentric wear early warning, a second-level eccentric wear early warning and a first-level eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.9R and less than R1 and less than or equal to R, the tire eccentric wear early warning is a first-stage eccentric wear early warning;
wherein obtaining the distance S1 between the first location point and the second location point comprises:
acquiring the position information of the first position point and acquiring the position information of the second position point;
the distance between the first position point and the second position point is determined based on the position information of the first position point and the position information of the second position point S1.
Acquiring a driving deviation D1 of the intelligent tire from a first position point to a second position point in a straight driving process, wherein the method comprises the following steps:
acquiring a road marking image on a road surface;
correcting the acquired road marking image, and carrying out adaptive median spatial filtering and denoising on the corrected road marking image to reduce image noise points;
and (3) segmenting the road marking image through a depth convolution network model to obtain the distance between adjacent road markings of the image as a standard path, and obtaining the driving deviation D1 through coordinate conversion.
Calculating the real-time wheel diameter R1 of the intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, wherein the method comprises the following steps:
calculating a unit distance driving deviation of the first smart tire according to the distance S1 between the first position point and the second position point and the driving deviation D1;
obtaining a wheel diameter compensation value corresponding to the unit distance running deviation of the first intelligent tire according to a preset wheel diameter compensation value;
and obtaining the real-time wheel diameter R1 of the first intelligent tire according to the wheel diameter compensation value.
Calculating the real-time wheel diameter R1 of the intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, wherein the method comprises the following steps:
determining the number of turns of the first intelligent tire according to the distance S1 between the first position point and the second position point and the real-time wheel diameter R1 of the first intelligent tire;
determining the number of turns of the second intelligent tire according to the distance S1 between the first position point and the second position point, the driving deviation D1 and the real-time wheel diameter R1 of the first intelligent tire;
and calculating to obtain the eccentric wear difference value of the first intelligent tire and the second intelligent tire according to the relation that the rotation turns of the first intelligent tire are equal to the rotation turns of the second intelligent tire.
Whether need change tire according to tire eccentric wear early warning grade judgement includes:
and when the tire eccentric wear early warning is the primary eccentric wear early warning, determining that the first intelligent tire does not need to be replaced.
Based on the same technical concept, referring to fig. 2, the disclosed embodiment of the present invention correspondingly provides an intelligent tire eccentric wear early warning device, which comprises:
the acquiring module is used for acquiring a driving deviation D1 of the automobile from a first position point to a second position point in the straight driving process on the highway and a distance S1 between the first position point and the second position point, wherein the driving deviation D1 is a difference value between a theoretical driving distance corresponding to the actual revolution number of the first intelligent tire and the distance S1 between the first position point and the second position point;
the early warning module is used for calculating the real-time wheel diameter R1 of the first intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, and performing tire eccentric wear early warning according to the difference value of the real-time wheel diameter R1 of the first intelligent tire and the wheel diameter R of the second intelligent tire of the first intelligent tire side by side, wherein the tire eccentric wear early warning grade is divided into from high to low: a third-level eccentric wear early warning, a second-level eccentric wear early warning and a first-level eccentric wear early warning;
when the real-time wheel diameter R1 of the intelligent tire is less than or equal to 0.8R, the tire eccentric wear early warning is a three-level eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.8R and less than R1 and less than or equal to 0.9R, the tire eccentric wear early warning is a secondary eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.9R and less than R1 and less than or equal to R, the tire eccentric wear early warning is a first-stage eccentric wear early warning;
the judging module is used for judging whether the tire needs to be replaced according to the tire eccentric wear early warning level;
the acquisition module is further used for acquiring the position information of the first position point and acquiring the position information of the second position point;
the distance between the first position point and the second position point is determined based on the position information of the first position point and the position information of the second position point S1.
The acquisition module comprises:
the image acquisition module is used for acquiring a road marking image on a road surface;
the image processing module is used for correcting the acquired road marking image, and carrying out adaptive median spatial filtering and denoising on the corrected road marking image to reduce image noise points;
and the image calculation module is used for segmenting the road marking image through the depth convolution network model to obtain the distance between adjacent road markings of the image as a standard path, and obtaining the driving deviation D1 through coordinate conversion.
The acquisition module comprises:
a deviation calculating unit for calculating a unit distance driving deviation of the first smart tire according to a distance S1 between the first position point and the second position point and a driving deviation D1;
the wheel diameter compensation value determining unit is used for obtaining a wheel diameter compensation value corresponding to the unit distance running deviation of the first intelligent tire according to a preset wheel diameter compensation value;
and the real-time wheel diameter determining unit is used for obtaining the real-time wheel diameter R1 of the first intelligent tire according to the wheel diameter compensation value.
The acquisition module further comprises:
the first determining unit is used for determining the number of turns of the first intelligent tire according to the distance S1 between the first position point and the second position point and the real-time wheel diameter R1 of the first intelligent tire;
a second determining unit for determining the number of rotations of the second intelligent tire according to the distance S1 between the first position point and the second position point, the driving deviation D1 and the real-time wheel diameter R1 of the first intelligent tire;
and the eccentric wear calculation unit is used for calculating the eccentric wear difference value of the first intelligent tire and the second intelligent tire according to the relation that the rotation turns of the first intelligent tire are equal to the rotation turns of the second intelligent tire.
The judging module comprises:
the first judgment unit is used for determining that the first intelligent tire needs to be replaced when the tire eccentric wear early warning is a three-level eccentric wear early warning;
the second judgment unit is used for judging whether the real-time wheel diameter R1 reaches a preset wheel diameter range or not when the tire eccentric wear early warning is a secondary eccentric wear early warning, and if so, determining that the first intelligent tire needs to be replaced;
or, when the tire eccentric wear early warning is a secondary eccentric wear early warning, judging whether the difference value between the real-time wheel diameter R1 and the standard wheel diameter R of the intelligent tire reaches a preset difference value threshold value, and if so, determining that the first intelligent tire needs to be replaced;
and the third judging unit is used for determining that the first intelligent tire does not need to be replaced when the tire eccentric wear early warning is a primary eccentric wear early warning.
According to the first concept of the invention, when the automobile runs straight at a high speed, the problem of inaccurate four-wheel positioning parameters is solved by monitoring whether the tire of the automobile is eccentrically worn in real time, the danger of tire burst caused by eccentric wear of the tire, steering wheel trembling and deviation are prevented, meanwhile, the driver can feel tired when driving, and the problems of traffic accident probability and oil consumption increase are increased.
According to the second concept of the invention, for the mode that the eccentric wear tire is replaced by the detection during maintenance, the invention judges the eccentric wear condition of the tire by monitoring the tire in real time according to the real-time wheel diameter of the tire, carries out different levels of eccentric wear early warning on the tire according to different eccentric wear conditions, and judges whether the tire needs to be replaced according to the early warning level.
In summary, the intelligent tire eccentric wear early warning method and device provided by the invention judge the eccentric wear condition of the tire through real-time monitoring of the tire according to the real-time wheel diameter of the tire, carry out eccentric wear early warning of different levels on the tire according to different eccentric wear conditions, and judge whether the tire needs to be replaced according to the early warning level. The invention has the function of monitoring whether the tire is eccentrically worn in real time, prevents the tire burst danger caused by the eccentric wear of the tire, reduces the probability of traffic accidents and improves the fuel efficiency.
It will be appreciated by persons skilled in the art that the above description of embodiments of the invention is intended only to illustrate the benefits of embodiments of the invention and is not intended to limit embodiments of the invention to any examples given.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. An intelligent tire eccentric wear early warning method is characterized by comprising the following steps:
acquiring a driving deviation D1 from a first position point to a second position point and a distance S1 between the first position point and the second position point in the process of straight driving of the automobile on a road, wherein the driving deviation D1 is a difference value between a theoretical driving distance corresponding to the actual revolution number of the first intelligent tire and the distance S1 between the first position point and the second position point;
calculating the real-time wheel diameter R1 of the first intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, and carrying out tire eccentric wear early warning according to the difference value of the real-time wheel diameter R1 of the first intelligent tire and the wheel diameter R of a second intelligent tire of the first intelligent tire in parallel, wherein the tire eccentric wear early warning grade is divided into: a third-level eccentric wear early warning, a second-level eccentric wear early warning and a first-level eccentric wear early warning;
when the real-time wheel diameter R1 of the intelligent tire is less than or equal to 0.8R, setting the tire eccentric wear early warning level as the three-level eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.8R and less than or equal to R1 and less than or equal to 0.9R, setting the tire eccentric wear early warning level as the secondary eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.9R and less than R1 and less than or equal to R, setting the tire eccentric wear early warning level as the primary eccentric wear early warning;
and judging whether the tire needs to be replaced according to the tire eccentric wear early warning level.
2. The method for early warning of the eccentric wear of the intelligent tire as claimed in claim 1, wherein the step of obtaining the driving deviation D1 of the intelligent tire from the first position point to the second position point in the straight driving process comprises the following steps:
acquiring a road marking image on a road surface;
correcting the acquired road marking image, and carrying out adaptive median spatial filtering and denoising on the corrected road marking image to reduce image noise;
segmenting the road marking image through a depth convolution network model to obtain the distance between adjacent road markings of the image as a standard path, and obtaining the driving deviation D1 through coordinate conversion;
wherein obtaining the distance S1 between the first location point and the second location point comprises:
acquiring the position information of the first position point and the position information of the second position point;
determining a distance S1 between the first location point and the second location point according to the location information of the first location point and the location information of the second location point.
3. The method as claimed in claim 2, wherein calculating the real-time wheel diameter R1 of the intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1 comprises:
calculating a unit distance driving deviation of the first smart tire according to the distance S1 between the first position point and the second position point and the driving deviation D1;
obtaining a wheel diameter compensation value corresponding to the unit distance running deviation of the first intelligent tire according to a preset wheel diameter compensation value;
and obtaining the real-time wheel diameter R1 of the first intelligent tire according to the wheel diameter compensation value.
4. The method as claimed in claim 3, wherein calculating the real-time wheel diameter R1 of the intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1 comprises:
determining the number of turns of the first intelligent tire according to the distance S1 between the first position point and the second position point and the real-time wheel diameter R1 of the first intelligent tire;
determining the number of turns of the second intelligent tire according to the distance S1 between the first position point and the second position point, the driving deviation D1 and the real-time wheel diameter R1 of the first intelligent tire;
and calculating to obtain the eccentric wear difference value of the first intelligent tire and the second intelligent tire according to the relation that the rotation turns of the first intelligent tire are equal to the rotation turns of the second intelligent tire.
5. The intelligent tire eccentric wear early warning method according to claim 4, wherein the step of judging whether the tire needs to be replaced according to the tire eccentric wear early warning level comprises the following steps:
when the tire eccentric wear early warning is the three-level eccentric wear early warning, determining that the first intelligent tire needs to be replaced;
when the tire eccentric wear early warning is the secondary eccentric wear early warning, judging whether the real-time wheel diameter R1 reaches a preset wheel diameter range, and if so, determining that the first intelligent tire needs to be replaced;
or when the tire eccentric wear early warning is the secondary eccentric wear early warning, judging whether the difference value between the real-time wheel diameter R1 and the standard wheel diameter R of the intelligent tire reaches a preset difference value threshold value, and if so, determining that the first intelligent tire needs to be replaced;
and when the tire eccentric wear early warning is the primary eccentric wear early warning, determining that the first intelligent tire does not need to be replaced.
6. The utility model provides an intelligence tire eccentric wear early warning device which characterized in that includes:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a driving deviation D1 of the automobile from a first position point to a second position point in the straight driving process on the road and a distance S1 between the first position point and the second position point, and the driving deviation D1 is the difference value of a theoretical driving distance corresponding to the actual revolution of a first intelligent tire and the distance S1 between the first position point and the second position point;
the early warning module is used for calculating the real-time wheel diameter R1 of the first intelligent tire according to the distance S1 between the first position point and the second position point and the driving deviation D1, and performing tire eccentric wear early warning according to the difference value between the real-time wheel diameter R1 of the first intelligent tire and the wheel diameter R of a second intelligent tire which is arranged side by side with the first intelligent tire, wherein the tire eccentric wear early warning grade is divided into: a third-level eccentric wear early warning, a second-level eccentric wear early warning and a first-level eccentric wear early warning;
when the real-time wheel diameter R1 of the intelligent tire is less than or equal to 0.8R, the tire eccentric wear early warning is the three-level eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.8R and less than or equal to R1 and less than or equal to 0.9R, the tire eccentric wear early warning is the secondary eccentric wear early warning;
when the real-time wheel diameter of the intelligent tire is more than 0.9R and less than R1 and less than or equal to R, the tire eccentric wear early warning is the primary eccentric wear early warning;
the judging module is used for judging whether the tire needs to be replaced according to the tire eccentric wear early warning level;
the acquisition module is further configured to acquire the position information of the first position point and acquire the position information of the second position point;
determining a distance S1 between the first location point and the second location point according to the location information of the first location point and the location information of the second location point.
7. The intelligent tire eccentric wear early warning device according to claim 6, wherein the obtaining module comprises:
the image acquisition module is used for acquiring a road marking image on a road surface;
the image processing module is used for correcting the acquired road marking image, and carrying out adaptive median spatial filtering and denoising on the corrected road marking image to reduce image noise points;
and the image calculation module is used for segmenting the road marking image through a depth convolution network model to obtain the distance between adjacent road markings of the image as a standard path, and obtaining the driving deviation D1 through coordinate conversion.
8. The intelligent tire partial wear early warning device according to claim 7, wherein the obtaining module comprises:
a deviation calculating unit for calculating a unit distance driving deviation of the first smart tire according to the distance S1 between the first position point and the second position point and the driving deviation D1;
the wheel diameter compensation value determining unit is used for obtaining a wheel diameter compensation value corresponding to the unit distance running deviation of the first intelligent tire according to a preset wheel diameter compensation value;
and the real-time wheel diameter determining unit is used for obtaining the real-time wheel diameter R1 of the first intelligent tire according to the wheel diameter compensation value.
9. The intelligent tire partial wear early warning device according to claim 8, wherein the obtaining module further comprises:
a first determining unit, configured to determine a number of rotations of the first smart tire according to a distance S1 between the first location point and the second location point and a real-time wheel diameter R1 of the first smart tire;
a second determination unit, configured to determine a rotation number of the second smart tire according to a distance S1 between the first location point and the second location point, the driving deviation D1, and a real-time wheel diameter R1 of the first smart tire;
and the eccentric wear calculation unit is used for calculating the eccentric wear difference value of the first intelligent tire and the second intelligent tire according to the relation that the rotation turns of the first intelligent tire are equal to the rotation turns of the second intelligent tire.
10. The intelligent tire eccentric wear early warning device according to claim 9, wherein the judgment module comprises:
the first judgment unit is used for determining that the first intelligent tire needs to be replaced when the tire eccentric wear early warning is the three-level eccentric wear early warning;
the second judging unit is used for judging whether the real-time wheel diameter R1 reaches a preset wheel diameter range or not when the tire eccentric wear early warning is the secondary eccentric wear early warning, and if so, determining that the first intelligent tire needs to be replaced;
or, when the tire eccentric wear early warning is the secondary eccentric wear early warning, judging whether the difference value between the real-time wheel diameter R1 and the standard wheel diameter R of the intelligent tire reaches a preset difference threshold value, and if so, determining that the first intelligent tire needs to be replaced;
and the third judgment unit is used for determining that the first intelligent tire does not need to be replaced when the tire eccentric wear early warning is the primary eccentric wear early warning.
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