CN111412848A - Tire wear detection method and device - Google Patents
Tire wear detection method and device Download PDFInfo
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- CN111412848A CN111412848A CN201910008942.7A CN201910008942A CN111412848A CN 111412848 A CN111412848 A CN 111412848A CN 201910008942 A CN201910008942 A CN 201910008942A CN 111412848 A CN111412848 A CN 111412848A
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- tire
- horizontal diameter
- hub
- wear
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/24—Wear-indicating arrangements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention provides a tire wear detection method and device, and belongs to the technical field of tire wear detection. The tire wear detection method comprises the following steps: recording the design value S of the horizontal diameter of the tire under the set tire pressure1And the design value S of the horizontal diameter of the hub2(ii) a Detecting the tire horizontal diameter T under the set tire pressure1And the horizontal diameter T of the hub2(ii) a Calculating the horizontal diameter T of the hub2Design value S of horizontal diameter of hub2Reduced ratio of (r): r ═ T2/S2(ii) a Using the converted ratio r to convert the tire horizontal diameter T1Conversion into the unloaded horizontal diameter d of the tire: d ═ T1R; according to the design value S of the horizontal diameter of the tire1And the unloaded horizontal diameter d of the tire determines the degree of tire wear. The invention utilizes the conversion ratio to uniformly convert the horizontal diameter of the tire under the set tire pressure to the no-load condition, so that the horizontal diameter of the tire before and after abrasion is unifiedAnd comparing the first value with the standard, so that the deviation of the measured tire wear degree is smaller than that of the actual condition, and the measurement result is more accurate.
Description
Technical Field
The invention relates to a tire wear detection method and device, and belongs to the technical field of tire wear detection.
Background
The tires of the vehicle are inevitably worn due to year-round contact with the ground. When the tire is seriously worn, the braking performance of the vehicle can be influenced, and great potential safety hazard exists.
The existing tire wear detection method generally adopts a visual inspection method, determines the tire wear degree through subjective judgment of people, and cannot ensure the accuracy due to the large subjective factor of the method; or a pattern depth measuring ruler is used for measuring the pattern depth of the tire, the measuring method is a contact type measuring method, and the detection efficiency is low; there are also methods for detecting tire wear by means of a probe, laser, or the like, and although contact-type measurement is not required, the operation is complicated and the cost is high.
More importantly, because the load state of the vehicle is not always the same, no matter which measuring method is adopted, the measured tire wear degree has certain deviation from the actual condition, and the measuring result is not accurate.
Disclosure of Invention
The invention aims to provide a tire wear detection method and a tire wear detection device, which are used for solving the problem that the measurement result is inaccurate when the tire wear detection is carried out in the prior art.
In order to achieve the above object, the present invention provides a tire wear detection method, comprising the steps of:
recording the design value S of the horizontal diameter of the tire under the set tire pressure1And the design value S of the horizontal diameter of the hub2；
Detecting the tire horizontal diameter T under the set tire pressure1And the horizontal diameter T of the hub2；
Calculating the horizontal diameter T of the hub2Design value S of horizontal diameter of hub2Reduced ratio of (r): r ═ T2/S2；
Using the converted ratio r to convert the tire horizontal diameter T1Conversion into the unloaded horizontal diameter d of the tire: d ═ T1/r；
According to the design value S of the horizontal diameter of the tire1And the unloaded horizontal diameter d of the tire determines the degree of tire wear.
The invention also provides a tire wear detection apparatus comprising a processor and a memory, the processor being configured to execute program instructions stored in the memory to implement the method of:
recording the design value S of the horizontal diameter of the tire under the set tire pressure1And the design value S of the horizontal diameter of the hub2；
In the above-mentionedSetting tire pressure, detecting tire horizontal diameter T1And the horizontal diameter T of the hub2；
Calculating the horizontal diameter T of the hub2Design value S of horizontal diameter of hub2Reduced ratio of (r): r ═ T2/S2；
Using the converted ratio r to convert the tire horizontal diameter T1Conversion into the unloaded horizontal diameter d of the tire: d ═ T1/r；
According to the design value S of the horizontal diameter of the tire1And the unloaded horizontal diameter d of the tire determines the degree of tire wear.
The tire wear detection method and the device have the advantages that: the horizontal diameter of the tire under the set tire pressure is uniformly converted to the no-load condition by utilizing the conversion ratio, so that the horizontal diameter of the tire before and after abrasion has a uniform comparison standard, the abrasion degree of the tire obtained by measurement has small deviation compared with the actual condition, and the measurement result is more accurate.
In order to predict the tire life, as an improvement to the above tire wear detection method and apparatus, the method further comprises the steps of:
recording the no-load horizontal diameter d of the same tire under the condition of consistent tire pressure within x daysx，x＝1,2,3,…；
For the same tire, the average degree of wear △ d is calculatedx：△dx＝(x*S1-∑dx)/x；
For the same tire, its life t is calculated: t ═ S1-a)/△dxAnd a is the maximum allowable wear degree of the tire.
In order to quickly locate the vehicle with the most serious tire wear, as another improvement of the tire wear detection method and the tire wear detection device, the method further comprises the following steps:
recording the no-load horizontal diameter d of the same type of tire of y vehicles on the same day under the condition of consistent tire pressurey，y＝1,2,3,…；
Screening out the no-load horizontal diameter d of the same type of tireyThe smallest tire, the vehicle on which it is located being the vehicle with the most worn tire.
As a further improvement to the above tire wear detection method and apparatus, the front image of the tire is taken and processed to obtain the tire horizontal diameter T1And the horizontal diameter T of the hub2。
Utilize image processing technique to handle tire image data, the processing speed is fast, can improve detection efficiency, can realize tire degree of wear's remote detection moreover, convenient operation.
Drawings
FIG. 1 is a flow chart of a tire wear detection method of an embodiment of the present invention;
fig. 2 is a schematic view of a tire wear detecting apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Tire wear detection method example:
referring to fig. 1, the tire wear detection method of the present invention includes the steps of:
recording the design value S of the horizontal diameter of the tire under the set tire pressure1And the design value S of the horizontal diameter of the hub2；
Acquiring a frontal image (e.g., a photograph) of the tire at a set tire pressure;
processing the image, and calculating the tire horizontal diameter in the image to obtain the tire horizontal diameter T1Calculating the horizontal diameter of the hub in the image to obtain the horizontal diameter T of the hub2；
Calculating the horizontal diameter T of the hub2Design value S of horizontal diameter of hub2Reduced ratio of (r): r ═ T2/S2；
Using the converted ratio r to convert the tire horizontal diameter T1Conversion into the unloaded horizontal diameter d of the tire: d ═ T1/r；
According to the design value S of the horizontal diameter of the tire1Determining the degree of wear of the tyre in relation to the unloaded horizontal diameter d of the tyre: (For example, tire wear degree m: m ═ S1-d)。
Wherein, the horizontal diameter of the wheel hub is not influenced by the tire pressure and is always a fixed value, namely, the horizontal diameter design value S of the wheel hub is always the same2So that the unloaded horizontal diameter of the hub is also equal to the design horizontal diameter S of the hub2。
In the embodiment, the horizontal diameter of the tire under the set tire pressure is uniformly converted to the no-load condition by using the conversion ratio, so that the horizontal diameter of the tire before and after abrasion has a uniform comparison standard, the deviation of the abrasion degree of the tire obtained by measurement is smaller than the actual condition, and the measurement result is more accurate; moreover, the tire image data is processed by utilizing the image processing technology, the processing speed is high, the detection efficiency can be improved, meanwhile, the remote detection of the tire wear degree can be realized, and the operation is convenient.
As another embodiment, the horizontal diameter T of the tire can be detected by using the prior art such as infrared and laser1And the horizontal diameter T of the hub2。
To predict tire life, after calculating the unloaded horizontal diameter of the tire, the following operations are performed:
recording the no-load horizontal diameter d of the same tire under the condition of consistent tire pressure within x daysx，x＝1,2,3,…；
For the same tire, the average degree of wear △ d is calculatedx：△dx＝(x*S1-∑dx)/x；
For the same tire, its life t is calculated: t ═ S1-a)/△dxAnd a is the maximum allowable wear degree of the tire.
The empty load horizontal diameter of the same tire is detected under the condition that the tire pressure is consistent within x days, so that the average wear degree and the service life of the tire can be calculated more accurately.
In order to quickly locate the vehicle with the most worn tire, after calculating the unloaded horizontal diameter of the tire, the following operations are performed:
recording the no-load level of the same type of tire of y vehicles on the same day under the condition of consistent tire pressureDiameter dy，y＝1,2,3,…；
Screening out the no-load horizontal diameter d of the same type of tireyThe smallest tire, the vehicle on which it is located being the vehicle with the most worn tire.
And sequencing the unloaded horizontal diameters of the same type of tires to obtain the tire with the smallest unloaded horizontal diameter of the same type of tires, so that the vehicle where the tire is located is the vehicle with the most serious tire wear.
The tire pressure consistency means that: the tire pressures are the same or different, but the error between different tire pressures is not more than 10%.
Tire wear detection apparatus example:
the tire wear detection device of the present invention comprises a processor and a memory, wherein the processor is used for running program instructions stored in the memory to realize the tire wear detection method of the present invention, and the specific method refers to the tire wear detection method embodiment.
The tire wear detection device of the present invention will be described in detail below, taking as an example the realization of tire wear detection by image processing technology.
Referring to fig. 2, the tire wear detecting device of the present invention includes an image detecting device, a processor and a memory, wherein the image detecting device is configured to acquire a front image of a tire and send the front image to the processor.
In this embodiment, the image detection device is a high-definition camera, and the processor and the memory are a vehicle data monitoring cloud platform, as another embodiment, the image detection device may also be a webcam or the like, and the processor and the memory may also be a computer or the like, where one or more image detection devices may be arranged according to actual needs.
When the tire wear detection is carried out, a vehicle to be detected (the tire pressure of the vehicle is the set tire pressure) drives into a measuring channel, and is in wireless communication with a vehicle data monitoring cloud platform to indicate that the vehicle needs to carry out the tire wear detection; when a vehicle to be tested receives feedback which is sent by a vehicle data detection cloud platform and can be detected, the vehicle continues to run, and when the vehicle runs to a camera switch position, a high-definition camera shoots front images of tires of the vehicle (as shown in fig. 2, in the embodiment, a high-definition camera is arranged only on the left side of a measurement channel, so that front images of two tires of the vehicle can be shot); then, the high-definition camera sends the image to a vehicle data monitoring cloud platform through wireless communication; then, the vehicle data monitoring cloud platform processes the received images to obtain the no-load horizontal diameter of each tire of the vehicle to be tested, and then the wear degree of each tire is calculated and stored; finally, the vehicle data monitoring cloud platform calculates the daily average wear degree and service life of the tire by using historical data of the same tire of the vehicle to be tested, and transmits the daily average wear degree and service life to the vehicle to be tested through wireless communication, so that an operator can conveniently master the tire wear condition of the vehicle to be tested and replace the tire in time; or after all vehicles are subjected to tire wear detection, the no-load horizontal diameters of the same type of tires among different vehicles are sequenced, the vehicle with the most serious tire wear is quickly positioned, and an operator can conveniently maintain the corresponding vehicle.
Claims (8)
1. A tire wear detection method, comprising the steps of:
recording the design value S of the horizontal diameter of the tire under the set tire pressure1And the design value S of the horizontal diameter of the hub2；
Detecting the tire horizontal diameter T under the set tire pressure1And the horizontal diameter T of the hub2；
Calculating the horizontal diameter T of the hub2Design value S of horizontal diameter of hub2Reduced ratio of (r): r ═ T2/S2；
Using the converted ratio r to convert the tire horizontal diameter T1Conversion into the unloaded horizontal diameter d of the tire: d ═ T1/r；
According to the design value S of the horizontal diameter of the tire1And the unloaded horizontal diameter d of the tire determines the degree of tire wear.
2. The tire wear detection method of claim 1, further comprising the steps of:
recording the no-load horizontal diameter d of the same tire under the condition of consistent tire pressure within x daysx，x＝1,2,3,…；
For the same tire, the average degree of wear △ d is calculatedx：△dx＝(x*S1-∑dx)/x；
For the same tire, its life t is calculated: t ═ S1-a)/△dxAnd a is the maximum allowable wear degree of the tire.
3. The tire wear detection method of claim 1, further comprising the steps of:
recording the no-load horizontal diameter d of the same type of tire of y vehicles on the same day under the condition of consistent tire pressurey，y＝1,2,3,…；
Screening out the no-load horizontal diameter d of the same type of tireyThe smallest tire, the vehicle on which it is located being the vehicle with the most worn tire.
4. A tyre wear detection method as claimed in any one of claims 1 to 3, characterized in that the images are processed to obtain the tyre horizontal diameter T by taking images of the front face of the tyre, said images being processed1And the horizontal diameter T of the hub2。
5. A tire wear detection apparatus comprising a processor and a memory, the processor being configured to execute program instructions stored in the memory to implement the method of:
recording the design value S of the horizontal diameter of the tire under the set tire pressure1And the design value S of the horizontal diameter of the hub2；
Detecting the tire horizontal diameter T under the set tire pressure1And the horizontal diameter T of the hub2；
Calculating the horizontal diameter T of the hub2Design value S of horizontal diameter of hub2Reduced ratio of (r): r ═ T2/S2；
Using the converted ratio r to convert the tire horizontal diameter T1Conversion into the unloaded horizontal diameter d of the tire: d ═ T1/r；
According to the design value S of the horizontal diameter of the tire1And the unloaded horizontal diameter d of the tire determines the degree of tire wear.
6. The tire wear detection device of claim 5, further comprising the steps of:
recording the no-load horizontal diameter d of the same tire under the condition of consistent tire pressure within x daysx，x＝1,2,3,…；
For the same tire, the average degree of wear △ d is calculatedx：△dx＝(x*S1-∑dx)/x；
For the same tire, its life t is calculated: t ═ S1-a)/△dxAnd a is the maximum allowable wear degree of the tire.
7. The tire wear detection device of claim 5, further comprising the steps of:
recording the no-load horizontal diameter d of the same type of tire of y vehicles on the same day under the condition of consistent tire pressurey，y＝1,2,3,…；
Screening out the no-load horizontal diameter d of the same type of tireyThe smallest tire, the vehicle on which it is located being the vehicle with the most worn tire.
8. The tire wear detection device according to any one of claims 5 to 7, wherein the image is processed to obtain the tire horizontal diameter T by taking a front image of the tire1And the horizontal diameter T of the hub2。
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| CN201910008942.7A CN111412848B (en) | 2019-01-04 | 2019-01-04 | Tire wear detection method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111879245A (en) * | 2020-07-31 | 2020-11-03 | 上海大学 | Automatic precision measuring device for vehicle part product |
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Address after: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Applicant after: Yutong Bus Co.,Ltd. Address before: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Applicant before: ZHENGZHOU YUTONG BUS Co.,Ltd. |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |