CN114789629B - Tire wear monitoring method and system - Google Patents
Tire wear monitoring method and system Download PDFInfo
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- CN114789629B CN114789629B CN202210397941.8A CN202210397941A CN114789629B CN 114789629 B CN114789629 B CN 114789629B CN 202210397941 A CN202210397941 A CN 202210397941A CN 114789629 B CN114789629 B CN 114789629B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 55
- 230000001133 acceleration Effects 0.000 claims description 178
- 238000005299 abrasion Methods 0.000 claims description 13
- 230000007613 environmental effect Effects 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 4
- 238000007689 inspection Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 206010039203 Road traffic accident Diseases 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- QIVUCLWGARAQIO-OLIXTKCUSA-N (3s)-n-[(3s,5s,6r)-6-methyl-2-oxo-1-(2,2,2-trifluoroethyl)-5-(2,3,6-trifluorophenyl)piperidin-3-yl]-2-oxospiro[1h-pyrrolo[2,3-b]pyridine-3,6'-5,7-dihydrocyclopenta[b]pyridine]-3'-carboxamide Chemical compound C1([C@H]2[C@H](N(C(=O)[C@@H](NC(=O)C=3C=C4C[C@]5(CC4=NC=3)C3=CC=CN=C3NC5=O)C2)CC(F)(F)F)C)=C(F)C=CC(F)=C1F QIVUCLWGARAQIO-OLIXTKCUSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/24—Wear-indicating arrangements
- B60C11/246—Tread wear monitoring systems
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Abstract
The invention provides a tire wear monitoring method and a system. The method comprises the steps of obtaining vehicle condition information of a vehicle, judging whether the current running road surface of the vehicle is an unmonitored road surface according to the vehicle condition information, obtaining pedal information of the vehicle when the current running road surface is not the unmonitored road surface, and determining the current running state of the vehicle according to the pedal information. And acquiring driving state information of the vehicle, comparing the driving state information under each driving state with the magnitude of each tire wear parameter threshold corresponding to each driving state, and outputting alarm information according to the comparison result. The scheme firstly judges the current running road surface condition of the vehicle, and can avoid the problem of inaccurate monitoring results in some extreme road surfaces. And, according to the magnitude of driving state information and tire wear parameter threshold value output warning information, the driver can directly be according to warning information inspection tire state to change the tire when necessary, thereby can reduce the higher problem of driving safety risk that the vehicle caused because of the water-skid phenomenon.
Description
Technical Field
The invention relates to the technical field of tire wear control, in particular to a tire wear monitoring method and system.
Background
With the promotion of economy, automobiles are also becoming more and more popular in China. With the rapid increase in vehicles, many people who have little knowledge of the vehicle take a driver license. These persons are unfamiliar with the vehicle condition and are prone to risk during use.
The automobile tire is an important part for safe running of the automobile, if the tread of the automobile tire is worn more, the depth of the pattern is insufficient, and the automobile is easy to generate a water skid phenomenon when running in rainy seasons, so that the running safety is affected. The water skid phenomenon means that the tread depth is significantly reduced when the wear of the vehicle tire is severe, and the drainage capacity of the vehicle tire is reduced. When the tire runs at a high speed on a ponding road surface, a water film can be formed between the tread and the road surface due to unsmooth drainage. The water film separates the tread of the tire from the road surface, so that the tread cannot form effective friction with the road surface, the tire loses the ground grabbing capability, and the running stability of the vehicle is deteriorated.
Most drivers do not know enough about the phenomenon of water skid, and cannot find the abrasion condition of the tire patterns in time and replace the tire in time, so that the running safety risk is increased.
Disclosure of Invention
The invention aims to solve the problem of high running safety risk caused by incapability of timely finding out tire wear by a driver in the prior art.
To solve the above problems, an embodiment of the present invention discloses a tire wear monitoring method, including:
s1: acquiring vehicle condition information of a vehicle, and judging whether the road surface on which the vehicle is currently running is an unmonitored road surface according to the vehicle condition information;
If yes, repeating the step of judging whether the road surface on which the vehicle is currently running is an unmonitored road surface;
If not, executing the step S2;
s2: acquiring pedal information of the vehicle, and determining the current running state of the vehicle according to the pedal information;
S3: and acquiring driving state information of the vehicle, comparing the driving state information under each driving state with the magnitude of each tire wear parameter threshold corresponding to each driving state, and outputting alarm information according to the comparison result.
By adopting the scheme, the road surface condition of the current running of the vehicle is judged, and the problem of inaccurate monitoring results in some extreme road surfaces can be avoided. In addition, the pedal information can directly represent the current running state of the vehicle, and the current running state of the vehicle is determined according to the pedal information, so that the accuracy of the determined running state can be improved. In addition, the warning information is output according to the driving state information and the magnitude of the tire abrasion parameter threshold value, and a driver can directly check the tire state according to the warning information and replace the tire when necessary, so that the problem of high running safety risk of the vehicle caused by the water skid phenomenon can be reduced.
According to another embodiment of the present invention, in the tire wear monitoring method disclosed in the embodiment of the present invention, in step S1, the vehicle condition information includes wheel speed information, an ambient temperature in which the vehicle is currently located, rainfall information, and status information of a wiper system of the vehicle; the non-monitorable road surface comprises a bumpy sand road surface, a low-attachment road surface and a non-wet road surface; and, step S1 includes:
S11: acquiring wheel speed information of any one wheel, and determining whether the road surface on which the vehicle is currently running is a bumpy gravel road surface according to the wheel speed information of the wheel and a preset wheel speed information threshold value;
S12: acquiring the current environmental temperature of the vehicle, and determining whether the road surface on which the vehicle is currently running is a low-attachment road surface according to the environmental temperature and a preset temperature threshold value;
S13: and acquiring the rainfall information and the state information of a wiper system of the vehicle, and determining whether the road surface on which the vehicle is currently running is a non-wet road surface according to the rainfall information and the state information of the wiper system.
By adopting the scheme, whether the road surface on which the vehicle runs at the moment is a bumpy gravel road surface or not is determined by utilizing the fluctuation frequency and the fluctuation amplitude of the wheel speed signal, and the fluctuation frequency and the fluctuation amplitude of the wheel speed signal can intuitively reflect the movement state of the tire in the running process, so that the judgment on the running road surface can be more accurate.
According to another embodiment of the present invention, in the tire wear monitoring method disclosed in the embodiment of the present invention, in step S11, the wheel speed information includes a wheel speed signal fluctuation frequency and a wheel speed signal fluctuation amplitude; and, according to the wheel speed information of the wheels and a preset wheel speed information threshold value, determining whether the road surface on which the vehicle is currently running is a bumpy gravel road surface or not, comprising:
judging whether the fluctuation frequency and the fluctuation amplitude of the wheel speed signal are both larger than a wheel speed information threshold value or not;
If yes, the road surface on which the vehicle is currently running is a bumpy gravel road surface;
if not, executing the step S2; in step S12, determining whether the road surface on which the vehicle is currently traveling is a low-traction road surface according to the ambient temperature and the preset temperature threshold includes:
judging whether the ambient temperature is less than a temperature threshold;
If yes, the road surface on which the vehicle is currently running is a low-attachment road surface;
if not, executing the step S2; and, in step S13, it is determined whether the road surface on which the vehicle is currently running is a non-wet road surface based on the rainfall information and the state information of the wiper system, including:
Judging whether rainfall information exists or not and whether a wiper system is started or not;
if yes, the road surface on which the vehicle is currently running is a non-wet road surface;
If not, executing the step S2; wherein the method comprises the steps of
In step S12, the temperature threshold is in the range of less than 8 ℃.
By adopting the scheme, whether the road surface on which the vehicle is currently running is a non-wet road surface or not is comprehensively judged according to the rainfall information acquired by the rainfall sensor and whether the wiper system is started or not, so that the problem of inaccurate judgment caused by the faults of the rainfall sensor or the wiper system controller can be prevented.
According to another embodiment of the present invention, in the tire wear monitoring method disclosed in the embodiment of the present invention, in step S2, the pedal information includes an accelerator pedal stroke and a brake pedal stroke; and, determining a current running state of the vehicle according to the pedal information, including: if the travel of the accelerator pedal is larger than a preset accelerator pedal threshold value, determining the current running state of the vehicle as an acceleration state; if the travel of the accelerator pedal is smaller than or equal to the threshold value of the accelerator pedal and the travel of the brake pedal is smaller than or equal to the threshold value of the preset brake pedal, determining the current running state of the vehicle as a sliding state; if the brake pedal travel is greater than the brake pedal threshold, the current running state of the vehicle is determined to be a braking state.
By adopting the scheme, the current running state of the vehicle can be rapidly and accurately determined directly according to the strokes of the accelerator pedal and the brake pedal.
According to another embodiment of the present invention, in step S3, obtaining a driving state of a vehicle includes obtaining a vehicle speed in a current driving state, obtaining a current acceleration of each wheel, and determining the driving state as driving state information in the current driving state; wherein the driving state information in each driving state includes: the acceleration speed and the acceleration wheel acceleration in the acceleration state; the coasting speed and the coasting wheel acceleration in the coasting state; and a braking vehicle speed and a braking wheel acceleration in a braking state; and the tire wear parameter threshold value in each running state includes: an acceleration vehicle speed threshold value and an acceleration wheel acceleration threshold value in an acceleration state; a coasting vehicle speed threshold and a coasting wheel acceleration threshold in a coasting state; and a brake vehicle speed threshold and a brake wheel acceleration threshold in a braking state; and respectively comparing the driving state information of each wheel in the current driving state with the corresponding tire wear parameter threshold value, and outputting alarm information according to the comparison result, wherein the method comprises the following steps: judging whether the acceleration speed in the acceleration state is greater than an acceleration speed threshold value and whether the acceleration wheel acceleration of any one wheel is greater than an acceleration wheel acceleration threshold value;
if yes, outputting alarm information;
if not, repeating the step of judging whether the acceleration speed in the acceleration state is greater than the acceleration speed threshold value and whether the acceleration wheel acceleration of any one wheel is greater than the acceleration wheel acceleration threshold value.
Judging whether the coasting speed in the coasting state is greater than a coasting speed threshold value and whether the coasting wheel acceleration of any one wheel is greater than a coasting wheel acceleration threshold value;
if yes, outputting alarm information;
if not, repeating the step of judging whether the coasting speed in the coasting state is greater than the coasting speed threshold value and whether the coasting wheel acceleration of any one wheel is greater than the coasting wheel acceleration threshold value.
Judging whether the braking speed in the braking state is greater than a braking speed threshold value and whether the braking wheel acceleration of any one wheel is smaller than a braking wheel acceleration threshold value;
if yes, outputting alarm information;
If not, repeating the step of judging whether the braking vehicle speed in the braking state is greater than the braking vehicle speed threshold value and whether the braking wheel acceleration of any one wheel is smaller than the braking wheel acceleration threshold value.
Wherein the range of the acceleration speed threshold is greater than 30kph; the range of the coasting speed threshold is greater than 60kph; the range of the braking speed threshold is more than 80kph; the range of acceleration wheel acceleration threshold is greater than 1.5rad/s 2; the range of the coaster wheel acceleration threshold is greater than 0.6rad/s 2; the brake wheel acceleration threshold is in the range of less than-4 rad/s 2.
With the above-described scheme, it is necessary to compare the driving state information of any one wheel in each running state with the corresponding tire wear parameter threshold value. Therefore, as long as one wheel meets the alarm condition, the alarm is triggered, so that a driver can be reminded of timely replacing the tire, and the risk in the running process is reduced.
According to another embodiment of the present invention, the tire wear monitoring method disclosed in the embodiment of the present invention, the alarm information includes: the tire position to be replaced is determined according to the comparison result of the driving state information of each wheel in the current driving state and the corresponding tire abrasion parameter threshold value; and after step S3, further comprising:
judging whether the driving state information of each wheel in each driving state is larger than 1.5 times of the corresponding tire wear parameter threshold value or not;
if yes, outputting alarm information to a braking system of the vehicle, and controlling the braking system to brake the vehicle;
if not, continuing to judge whether the driving state information of each wheel in each driving state is larger than 1.5 times of the corresponding tire abrasion parameter threshold value.
By adopting the scheme, the position of the tire to be replaced is used as the alarm information, and a driver can directly determine which tire to replace according to the alarm information, so that the maintenance time is saved. And, through further judging the magnitude relation of the driving state information of each wheel and the corresponding tire wear parameter threshold value 1.5 times under each driving state, and braking the vehicle according to the comparison result, the probability of occurrence of traffic accidents can be reduced, and the driving safety is further improved.
According to another embodiment of the present invention, in step S1, vehicle condition information of a vehicle is obtained, and whether a road surface on which the vehicle is currently traveling is an unmonitored road surface is determined according to the vehicle condition information, including: acquiring vehicle condition information of a vehicle by a preset first time threshold value, and judging whether the current running road surface of the vehicle is an unmonitored road surface by a preset second time threshold value according to the vehicle condition information; wherein the duration of the first time threshold is less than or equal to the duration of the second time threshold.
By adopting the scheme, the steps of acquiring the vehicle condition information and judging the road surface condition are executed by the preset time threshold, so that the calculation time can be saved, the calculation speed can be increased, the processor is not required to be electrified all the time, and the energy is saved.
The embodiment of the invention also discloses a tire wear monitoring system, which comprises: the information acquisition module acquires vehicle condition information, pedal information and driving state information of the vehicle; the tire wear monitoring module judges whether the current running road surface of the vehicle is an unmonitored road surface according to the vehicle condition information, and determines the current running state of the vehicle according to the pedal information when the current running road surface is a monitorable road surface; and the tire wear monitoring module also respectively compares the driving state information under each driving state with the magnitude of each tire wear parameter threshold value corresponding to each driving state, and outputs alarm information according to the comparison result.
According to another embodiment of the invention, the tyre wear monitoring system disclosed in the embodiment of the invention further comprises an alarm module; the alarm module outputs alarm information according to the driving state information under each driving state and each tire abrasion parameter threshold value corresponding to each driving state.
According to another embodiment of the invention, the tyre wear monitoring system disclosed by the embodiment of the invention comprises wheel speed information, the current environment temperature of the vehicle, rainfall information and state information of a wiper system of the vehicle; the pedal information includes an accelerator pedal stroke and a brake pedal stroke; the driving state information includes an acceleration vehicle speed in an acceleration state, and an acceleration wheel acceleration; the coasting speed and the coasting wheel acceleration in the coasting state; and a braking vehicle speed and a braking wheel acceleration in a braking state; the information acquisition module comprises a vehicle speed acquisition device, a wheel acceleration acquisition device, a temperature acquisition device, a rainfall sensor and a windscreen wiper state acquisition device; the vehicle speed collector collects the acceleration speed, the sliding speed and the braking speed; the wheel speed collector collects wheel speed information; the wheel acceleration collector collects acceleration wheel acceleration, sliding wheel acceleration and braking wheel acceleration; the temperature collector collects the current environmental temperature of the vehicle; the rainfall sensor collects rainfall information; the wiper state collector collects state information of a wiper system of a vehicle.
The beneficial effects of the invention are as follows:
The tire wear monitoring method provided by the invention can be used for judging the current running road surface condition of the vehicle, so that the problem of inaccurate monitoring results in some extreme road surfaces can be avoided. In addition, the pedal information can directly represent the current running state of the vehicle, and the current running state of the vehicle is determined according to the pedal information, so that the accuracy of the determined running state can be improved. In addition, the warning information is output according to the driving state information and the magnitude of the tire abrasion parameter threshold value, and a driver can directly check the tire state according to the warning information and replace the tire when necessary, so that the problem of high running safety risk of the vehicle caused by the water skid phenomenon can be reduced.
According to the tire wear monitoring system, alarming information can be output according to the driving state information and the magnitude of the tire wear parameter threshold value, a driver can directly check the tire state according to the alarming information and replace the tire when necessary, and therefore the problem that the running safety risk of a vehicle is high due to the water skid phenomenon can be reduced.
Drawings
FIG. 1 is a schematic flow chart of a tire wear monitoring method provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a tire wear monitoring system according to an embodiment of the present invention.
Reference numerals illustrate:
1. An information acquisition module; 11. a vehicle speed collector; 12. a wheel speed collector; 13. a wheel acceleration collector; 14. a temperature collector; 15. a rainfall sensor; 16. a wiper state collector; 2. a tire wear monitoring module; 3. and an alarm module.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples. While the description of the invention will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the invention described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the invention. The following description contains many specific details for the purpose of providing a thorough understanding of the present invention. The invention may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Example 1:
In order to solve the problem of high running safety risk caused by incapability of timely finding tire wear by a driver in the prior art, the embodiment of the invention provides a tire wear monitoring method, and particularly, reference is made to fig. 1. The tire wear monitoring method provided by the specific embodiment comprises the following steps:
s1: acquiring vehicle condition information of a vehicle, and judging whether the road surface on which the vehicle is currently running is an unmonitored road surface according to the vehicle condition information;
If yes, repeating the step of judging whether the road surface on which the vehicle is currently running is an unmonitored road surface;
If not, executing the step S2;
s2: acquiring pedal information of the vehicle, and determining the current running state of the vehicle according to the pedal information;
S3: and acquiring driving state information of the vehicle, comparing the driving state information under each driving state with the magnitude of each tire wear parameter threshold corresponding to each driving state, and outputting alarm information according to the comparison result.
The method comprises the steps of firstly judging the current running road surface condition of the vehicle, and avoiding the problem of inaccurate monitoring results in some extreme road surfaces. In addition, the pedal information can directly represent the current running state of the vehicle, and the current running state of the vehicle is determined according to the pedal information, so that the accuracy of the determined running state can be improved. In addition, the warning information is output according to the driving state information and the magnitude of the tire abrasion parameter threshold value, and a driver can directly check the tire state according to the warning information and replace the tire when necessary, so that the problem of high running safety risk of the vehicle caused by the water skid phenomenon can be reduced.
Further, in the tire wear monitoring method according to the present invention, in step S1, the vehicle condition information includes wheel speed information, an ambient temperature in which the vehicle is currently located, rainfall information, and state information of a wiper system of the vehicle. Non-monitorable road surfaces include bumpy gravel road surfaces, low-traction road surfaces, and non-wet road surfaces. Specifically, the wheel speed information is obtained through a wheel speed sensor, the current ambient temperature of the vehicle can be obtained through a temperature sensor, the rainfall information can be obtained through a rainfall sensor, and the state information of a wiper system of the vehicle can be obtained through a wiper system controller. More specifically, a bumpy gravel road surface refers to a bad road state that is easy to make a vehicle bumpy or has more sand; the low-adhesion road surface is an ice and snow road surface; the non-wet road surface is a road surface on which the vehicle is not traveling in a rainy day.
Further, in the tire wear monitoring method according to the present invention, step S1 includes:
S11: acquiring wheel speed information of any one wheel, and determining whether the road surface on which the vehicle is currently running is a bumpy gravel road surface according to the wheel speed information of the wheel and a preset wheel speed information threshold value;
S12: acquiring the current environmental temperature of the vehicle, and determining whether the road surface on which the vehicle is currently running is a low-attachment road surface according to the environmental temperature and a preset temperature threshold value;
S13: and acquiring the rainfall information and the state information of a wiper system of the vehicle, and determining whether the road surface on which the vehicle is currently running is a non-wet road surface according to the rainfall information and the state information of the wiper system.
Still further, in the tire wear monitoring method according to the present invention, in step S11, the wheel speed information includes a wheel speed signal fluctuation frequency and a wheel speed signal fluctuation amplitude. It is to be understood that both the fluctuation frequency and the fluctuation amplitude of the wheel speed signal are greatly increased when the vehicle is running in a bad road state. In the specific embodiment, the threshold value of the fluctuation frequency and the threshold value of the fluctuation amplitude of the wheel speed signal in unit time when the vehicle runs on the bad road can be defined through the vehicle test, and the threshold value is compared with the fluctuation frequency of the wheel speed signal and the fluctuation amplitude of the wheel speed signal which are actually collected, so that the running state of the vehicle on the bad road can be monitored.
Still further, in the tire wear monitoring method according to the present invention, determining whether a road on which the vehicle is currently traveling is a bumpy road or not based on wheel speed information of wheels and a preset wheel speed information threshold value includes: judging whether the fluctuation frequency and the fluctuation amplitude of the wheel speed signal are both larger than a wheel speed information threshold value or not;
If yes, the road surface on which the vehicle is currently running is a bumpy gravel road surface;
if not, step S2 is performed.
The method comprises the step of determining whether the road surface on which the vehicle is running is a bumpy gravel road surface by utilizing the fluctuation frequency and the fluctuation amplitude of the wheel speed signal, and the judgment on the running road surface can be more accurate because the fluctuation frequency and the fluctuation amplitude of the wheel speed signal can more intuitively reflect the movement state of the tire in the running process.
Still further, in the tire wear monitoring method according to the present invention, in step S12, it is determined whether the road on which the vehicle is currently running is a low-accessory road according to the ambient temperature and a preset temperature threshold value, including:
judging whether the ambient temperature is less than a temperature threshold;
If yes, the road surface on which the vehicle is currently running is a low-attachment road surface;
if not, step S2 is performed.
Specifically, in this embodiment, the temperature threshold is in the range of less than 8 ℃. That is, when the ambient temperature is lower than 8 ℃, it is considered that the vehicle may be running on a low road surface. More specifically, the set value of the temperature threshold may be 8 ℃, or 6.5 ℃,1 ℃,2 ℃ or the like, which can be determined by those skilled in the art according to the actual situation.
Further, in the tire wear monitoring method according to the present invention, in step S13, it is determined whether or not the road surface on which the vehicle is currently running is a non-wet road surface, based on the rainfall information and the state information of the wiper system, including: judging whether rainfall information exists or not and whether a wiper system is started or not;
if yes, the road surface on which the vehicle is currently running is a non-wet road surface;
if not, step S2 is performed.
That is, in this embodiment, whether the road surface on which the vehicle is currently running is a non-wet road surface is comprehensively determined based on the rainfall information acquired by the rainfall sensor and whether the wiper system is activated. With such a step, the problem of inaccurate judgment due to a failure of the rain sensor or the wiper system controller can be prevented. In addition, the monitoring is only carried out in rainy days, so that the energy consumption can be saved.
Further, in the tire wear monitoring method according to the present invention, in step S2, the pedal information includes an accelerator pedal stroke and a brake pedal stroke. Determining a current driving state of the vehicle according to the pedal information, including:
if the travel of the accelerator pedal is larger than a preset accelerator pedal threshold value, determining the current running state of the vehicle as an acceleration state;
If the travel of the accelerator pedal is smaller than or equal to the threshold value of the accelerator pedal and the travel of the brake pedal is smaller than or equal to the threshold value of the preset brake pedal, determining the current running state of the vehicle as a sliding state;
if the brake pedal travel is greater than the brake pedal threshold, the current running state of the vehicle is determined to be a braking state.
Specifically, in this embodiment, the preset accelerator pedal threshold is 0, and the preset brake pedal threshold is also 0. I.e. when the stroke of the accelerator pedal is greater than 0, the vehicle is in an acceleration state; the strokes of the accelerator pedal and the brake pedal are 0, and the vehicle is in a sliding state; when the stroke of the brake pedal is 0, the brake pedal is in a braking state. The method has the step that the current running state of the vehicle can be rapidly and accurately determined directly according to the strokes of the accelerator pedal and the brake pedal.
Further, in the tire wear monitoring method according to the present invention, in step S3, acquiring the driving state of the vehicle includes acquiring the vehicle speed of the current running state, and acquiring the current acceleration of each wheel, and determining as the driving state information in the current running state. Wherein the driving state information in each driving state includes: the acceleration speed and the acceleration wheel acceleration in the acceleration state; the coasting speed and the coasting wheel acceleration in the coasting state; and a braking vehicle speed and a braking wheel acceleration in a braking state. Specifically, the current acceleration of the wheels in each running state is obtained from a wheel acceleration sensor, and the vehicle speed may be obtained directly from a vehicle speed sensor.
Further, in the tire wear monitoring method according to the present invention, the tire wear parameter threshold value in each running state includes: an acceleration vehicle speed threshold value and an acceleration wheel acceleration threshold value in an acceleration state; a coasting vehicle speed threshold and a coasting wheel acceleration threshold in a coasting state; and a braking vehicle speed threshold value and a braking wheel acceleration threshold value in a braking state. Specifically, the range of the acceleration vehicle speed threshold is greater than 30kph, and specifically may be 31kph, 40kph, or other values within the range; the acceleration wheel acceleration threshold is in the range of greater than 1.5rad/s 2, which may specifically be 1.6rad/s 2、2rad/s2, or other values within this range. The range of the coast speed threshold is greater than 60kph, and may specifically be 61kph, 70kph, or other values within the range; the range of the caster acceleration threshold is greater than 0.6rad/s 2, which may be 0.7rad/s 2、1rad/s2 in particular, or other values within this range. The braking vehicle speed threshold value is in a range of more than 80kph, and can be 81kph, 90kph or other values in the range; the headblock acceleration threshold may range from less than-4 rad/s 2, specifically from-4.1 rad/s 2、-5rad/s2, or other values within this range. In the present embodiment, the upper limit of the tire wear parameter threshold value in each running state is not limited, and those skilled in the art can comprehensively determine parameters such as the vehicle type and the actual running road surface friction.
Further, in the tire wear monitoring method according to the present invention, the driving state information of each wheel in the current running state is compared with the corresponding tire wear parameter threshold value, and alarm information is output according to the comparison result, including:
Judging whether the acceleration speed in the acceleration state is greater than an acceleration speed threshold value and whether the acceleration wheel acceleration of any one wheel is greater than an acceleration wheel acceleration threshold value;
if yes, outputting alarm information;
if not, repeating the step of judging whether the acceleration speed in the acceleration state is greater than the acceleration speed threshold value and whether the acceleration wheel acceleration of any one wheel is greater than the acceleration wheel acceleration threshold value.
Judging whether the coasting speed in the coasting state is greater than a coasting speed threshold value and whether the coasting wheel acceleration of any one wheel is greater than a coasting wheel acceleration threshold value;
if yes, outputting alarm information;
if not, repeating the step of judging whether the coasting speed in the coasting state is greater than the coasting speed threshold value and whether the coasting wheel acceleration of any one wheel is greater than the coasting wheel acceleration threshold value.
Judging whether the braking speed in the braking state is greater than a braking speed threshold value and whether the braking wheel acceleration of any one wheel is smaller than a braking wheel acceleration threshold value;
if yes, outputting alarm information;
If not, repeating the step of judging whether the braking vehicle speed in the braking state is greater than the braking vehicle speed threshold value and whether the braking wheel acceleration of any one wheel is smaller than the braking wheel acceleration threshold value.
Specifically, in the present embodiment, it is necessary to compare the driving state information of any one of the wheels in each running state with the corresponding tire wear parameter threshold value. That is, as soon as the wheel acceleration of one wheel exceeds the threshold value, an alarm message is output. The method has the steps that as long as one wheel meets the alarming condition, the alarming is triggered, so that a driver can be reminded of timely replacing the tire, and the risk in the driving process is reduced.
Further, in the tire wear monitoring method according to the present invention, the warning information includes: and determining the tire position to be replaced according to the comparison result of the driving state information of each wheel in the current driving state and the corresponding tire wear parameter threshold value.
The method has the steps that the position of the tire to be replaced is used as alarm information, and a driver can directly determine which tire to replace according to the alarm information, so that maintenance time is saved.
Further, in the tire wear monitoring method according to the present invention, after step S3, further comprising: judging whether the driving state information of each wheel in each driving state is larger than 1.5 times of the corresponding tire wear parameter threshold value or not;
if yes, outputting alarm information to a braking system of the vehicle, and controlling the braking system to brake the vehicle;
if not, continuing to judge whether the driving state information of each wheel in each driving state is larger than 1.5 times of the corresponding tire abrasion parameter threshold value.
Specifically, taking a braking state as an example for illustration, if the braking vehicle speed in the braking state is greater than a braking vehicle speed threshold, for example 80kph, and the braking wheel acceleration of any one wheel is smaller than the braking wheel acceleration threshold, for example-4 rad/s 2, then it is further determined whether the braking vehicle speed is greater than 120kph, and whether the braking wheel acceleration of any one wheel is smaller than-6 rad/s 2, if so, it is indicated that the tire gripping capability at this time is poor, the possibility of occurrence of an accident in continuous running is high, and the braking system of the vehicle needs to be controlled to brake the vehicle. The method comprises the steps of further judging the magnitude relation between the driving state information of each wheel in each driving state and the corresponding tire wear parameter threshold value by 1.5 times, and braking the vehicle according to the comparison result, so that the probability of traffic accidents can be reduced, and the driving safety is further improved.
Further, in the tire wear monitoring method according to the present invention, in step S1, vehicle condition information of a vehicle is acquired, and whether a road surface on which the vehicle is currently running is an unmonitored road surface is judged according to the vehicle condition information, including: acquiring vehicle condition information of a vehicle by a preset first time threshold value, and judging whether the current running road surface of the vehicle is an unmonitored road surface by a preset second time threshold value according to the vehicle condition information; wherein the duration of the first time threshold is less than or equal to the duration of the second time threshold. Specifically, the first time threshold may range from about 5 minutes to about half an hour, and may specifically be 5 minutes, 10 minutes, 30 minutes, or other values within this range. The second time threshold may range from about 10 minutes to about one hour, and may specifically be 10 minutes, 30 minutes, 45 minutes, 60 minutes, or other values within this range. However, no matter how many the first time threshold and the second time threshold take values, it is required to ensure that the first time threshold is smaller than or equal to the second time threshold, that is, the time interval for acquiring the vehicle condition information is smaller than or equal to the time interval for judging the road condition. It should be noted that, the range of the first time threshold and the range of the second time threshold may be determined by those skilled in the art according to actual requirements, and may be set to several minutes or several hours. The steps of acquiring the vehicle condition information and judging the road surface condition are executed by the preset time threshold, so that the calculation time can be saved, the calculation speed can be increased, the processor is not required to be powered on all the time, and the energy is saved.
Example 2:
Based on the above tire wear monitoring method, the embodiment of the invention also provides a tire wear monitoring system, and in particular, reference is made to fig. 2. The tire wear monitoring system provided by the embodiment comprises an information acquisition module 1 and a tire wear monitoring module 2. The information acquisition module 1 acquires vehicle condition information, pedal information, and driving state information of a vehicle. The tire wear monitoring module 2 judges whether the road surface on which the vehicle is currently running is an unmonitored road surface according to the vehicle condition information, and determines the current running state of the vehicle according to the pedal information when the road surface on which the vehicle is currently running is a monitorable road surface. The tire wear monitoring module 2 also compares the driving state information in each driving state with the magnitude of each tire wear parameter threshold value corresponding to each driving state, and outputs alarm information according to the comparison result.
Further, in the tire wear monitoring system according to the present invention, the tire wear monitoring system further includes an alarm module 3. The alarm module 3 outputs alarm information according to the driving state information under each driving state and each tire abrasion parameter threshold value corresponding to each driving state.
Further, in the tire wear monitoring system according to the present invention, the vehicle condition information includes wheel speed information, an ambient temperature in which the vehicle is currently located, rainfall information, and state information of a wiper system of the vehicle. The pedal information includes an accelerator pedal stroke and a brake pedal stroke. The driving state information includes an acceleration vehicle speed in an acceleration state, and an acceleration wheel acceleration; the coasting speed and the coasting wheel acceleration in the coasting state; and a braking vehicle speed and a braking wheel acceleration in a braking state. The information acquisition module 1 comprises a vehicle speed acquisition device 11, a wheel speed acquisition device 12, a wheel acceleration acquisition device 13, a temperature acquisition device 14, a rainfall sensor 15 and a windscreen wiper state acquisition device 16.
Further, in the tire wear monitoring system according to the present invention, the vehicle speed collector 11 collects an acceleration vehicle speed, a coasting vehicle speed, and a braking vehicle speed. The wheel speed collector 12 collects wheel speed information. The wheel acceleration collector 13 collects acceleration wheel acceleration, coast wheel acceleration, and brake wheel acceleration. The temperature collector 14 collects the ambient temperature at which the vehicle is currently located. The rain sensor 15 collects rain information. The wiper state collector 16 collects state information of a wiper system of a vehicle.
Specifically, when the tire wear monitoring system monitors that the driving state information in each driving state meets the preset condition, namely that the depth of the tire pattern is insufficient, the drainage requirement cannot be met, and the vehicle tire is in a floating or nearly floating state on the water film. At the moment, the system sends an alarm signal to the instrument, and the instrument reminds a driver to check the tire state, so that the aim of reminding the driver to replace the tire can be achieved. Of course, those skilled in the art can also select other alarm prompt modes according to actual requirements, such as a buzzer, a center console display, and the like.
Example 3:
based on the tire wear monitoring method and the tire wear monitoring system, the embodiment also provides a specific tire wear detection method.
When the vehicle runs, the wheel speed information of each tire of the vehicle is collected by the wheel speed sensor, and whether the vehicle is in a bad road state such as bumpy sand road surface or not is confirmed by the wheel speed information. When the vehicle runs on a bumpy and sandy road, the fluctuation frequency and the fluctuation amplitude of the wheel speed information are increased to a large extent. When the fluctuation frequency and the fluctuation amplitude of the wheel speed information of any wheel are larger than preset frequency and amplitude thresholds, the vehicle is indicated to run on a bumpy gravel road surface. The tire wear monitoring system does not monitor at this time.
And meanwhile, the temperature sensor is used for collecting the ambient temperature, and whether the vehicle is on a low-grade road surface is confirmed by using the ambient temperature. When the ambient temperature is below 8 ℃, it is considered that the vehicle may be traveling on a low road surface, such as when the vehicle is traveling on a low road surface, the tire wear monitoring system does not monitor.
Meanwhile, whether the vehicle is on a non-wet road surface or not is confirmed by utilizing switch signals of the rainfall sensor and the wiper controller, and if the vehicle is not on the non-wet road surface, the vehicle is not driven in a rainy day. The tire wear monitoring system does not monitor at this time, and only monitors when the vehicle is traveling in a rainy day.
When the vehicle runs in rainy days, the tire wear monitoring system is started to monitor. When the tire wear monitoring system monitors, the following control is performed by collecting the vehicle speed, the current acceleration of each wheel and the stroke of a brake pedal and an accelerator pedal:
When the accelerator pedal stroke of the vehicle is greater than 0, the vehicle is in an accelerating state. In this state, the current vehicle speed and the wheel acceleration of each wheel are acquired. If the current vehicle speed is greater than 30kph and the wheel acceleration of any one wheel is greater than 1.5rad/s 2, an alarm signal is output to the instrument for display.
The vehicle is in a coasting state when both the accelerator and brake pedal strokes of the vehicle are 0. In this state, the current vehicle speed and the wheel acceleration of each wheel are acquired. If the current vehicle speed is greater than 60kph and the wheel acceleration of any one wheel is greater than 0.6rad/s 2, an alarm signal is output to the instrument for display.
When the brake pedal stroke of the vehicle is greater than 0, the vehicle is in a braked state. In this state, the current vehicle speed and the wheel acceleration of each wheel are acquired. If the current vehicle speed is greater than 80kph and the wheel acceleration of any one wheel is less than-4 rad/s 2, an alarm signal is output to the instrument for display.
Having such a step, by determining three driving states of the vehicle and defining different vehicle speeds and wheel acceleration thresholds for each driving state for identifying the wheel slip state, the accuracy of the slip state identification can be improved. And moreover, the non-monitorable road surface is eliminated through the combination of signals such as the wheel speed signal, the ambient temperature, the rainfall sensor, the windscreen wiper switch and the like, the driving state in the rainy day is identified, the tire wear monitoring system does not need to monitor in real time, and the energy consumption is saved.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the invention with reference to specific embodiments, and it is not intended to limit the practice of the invention to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present invention.
Claims (8)
1. A method of monitoring tire wear, comprising:
S1: acquiring vehicle condition information of a vehicle, and judging whether a road surface on which the vehicle is currently running is an unmonitored road surface according to the vehicle condition information;
if yes, repeating the step of judging whether the road surface on which the vehicle is currently running is an unmonitored road surface;
If not, executing the step S2;
s2: acquiring pedal information of the vehicle, and determining the current running state of the vehicle according to the pedal information;
S3: acquiring driving state information of the vehicle, respectively comparing the driving state information under each driving state with the magnitude of each tire abrasion parameter threshold corresponding to each driving state, and outputting alarm information according to the comparison result; and
In the step S1, the vehicle condition information includes wheel speed information, an ambient temperature where the vehicle is currently located, rainfall information, and state information of a wiper system of the vehicle;
The non-monitorable road surface comprises a bumpy sand road surface, a low-attachment road surface and a non-wet road surface; and
The step S1 includes:
s11: acquiring the wheel speed information of any one wheel, and determining whether the road surface on which the vehicle is currently running is a bumpy gravel road surface according to the wheel speed information of the wheel and a preset wheel speed information threshold value;
S12: acquiring the current environmental temperature of the vehicle, and determining whether the road surface on which the vehicle is currently running is a low-attachment road surface according to the environmental temperature and a preset temperature threshold value;
S13: acquiring the rainfall information and the state information of a wiper system of the vehicle, and determining whether the road surface on which the vehicle is currently running is a non-wet road surface according to the rainfall information and the state information of the wiper system;
in the step S2, the pedal information includes a brake pedal stroke;
If the brake pedal stroke is larger than a preset brake pedal threshold value, determining the current running state of the vehicle as a braking state;
In the step S3, the step of obtaining the driving state of the vehicle includes obtaining a vehicle speed in a current driving state, obtaining a current acceleration of each wheel, and determining the driving state as driving state information in the current driving state; wherein the method comprises the steps of
The driving state information in each of the driving states includes:
The braking speed and the braking wheel acceleration in the braking state; and
The tire wear parameter threshold value in each of the running states includes:
a braking vehicle speed threshold value and a braking wheel acceleration threshold value in the braking state; and
Comparing the driving state information of each wheel in the current driving state with the corresponding tire wear parameter threshold value, and outputting alarm information according to the comparison result, wherein the method comprises the following steps:
judging whether the braking vehicle speed in the braking state is greater than the braking vehicle speed threshold value and whether the braking wheel acceleration of any one of the wheels is smaller than the braking wheel acceleration threshold value;
if yes, outputting alarm information;
If not, repeating the step of judging whether the braking vehicle speed in the braking state is greater than the braking vehicle speed threshold value and whether the braking wheel acceleration of any one of the wheels is smaller than the braking wheel acceleration threshold value.
2. The tire wear monitoring method according to claim 1, wherein in the step S11, the wheel speed information includes a wheel speed signal fluctuation frequency and a wheel speed signal fluctuation amplitude; and
Determining whether the road surface on which the vehicle is currently running is a bumpy gravel road surface according to the wheel speed information of the wheels and a preset wheel speed information threshold value comprises:
Judging whether the fluctuation frequency of the wheel speed signal and the fluctuation amplitude of the wheel speed signal are both larger than the wheel speed information threshold value or not;
If yes, the road surface on which the vehicle is currently running is a bumpy gravel road surface;
if not, executing the step S2; and
In the step S12, determining whether the road surface on which the vehicle is currently running is a low-adhesion road surface according to the ambient temperature and a preset temperature threshold includes:
Judging whether the ambient temperature is less than the temperature threshold;
if yes, the road surface on which the vehicle is currently running is a low-attachment road surface;
if not, executing the step S2; and
In the step S13, determining whether the road surface on which the vehicle is currently running is a non-wet road surface according to the rainfall information and the state information of the wiper system includes:
judging whether the rainfall information exists or not and whether the wiper system is started or not;
if yes, the road surface on which the vehicle is currently running is a non-wet road surface;
If not, executing the step S2; wherein the method comprises the steps of
In the step S12, the temperature threshold is in a range of less than 8 ℃.
3. The tire wear monitoring method according to claim 1, wherein in the step S2, the pedal information further includes an accelerator pedal stroke; and
Determining the current running state of the vehicle according to the pedal information comprises the following steps:
If the travel of the accelerator pedal is larger than a preset accelerator pedal threshold value, determining the current running state of the vehicle as an acceleration state;
And if the accelerator pedal stroke is smaller than or equal to the accelerator pedal threshold value and the brake pedal stroke is smaller than or equal to the brake pedal threshold value, determining the current running state of the vehicle as a sliding state.
4. A tire wear monitoring method as in claim 3, wherein in said step S3,
The driving state information in each of the driving states further includes:
the acceleration speed and the acceleration wheel acceleration under the acceleration state;
The coasting speed and the coasting wheel acceleration in the coasting state;
the tire wear parameter threshold value in each of the running states further includes:
An acceleration vehicle speed threshold value and an acceleration wheel acceleration threshold value in the acceleration state;
A coasting vehicle speed threshold value and a coasting wheel acceleration threshold value in the coasting state; and
Comparing the driving state information of each wheel in the current driving state with the corresponding tire abrasion parameter threshold value, outputting alarm information according to the comparison result, and further comprising:
judging whether the acceleration speed in the acceleration state is greater than the acceleration speed threshold value and whether the acceleration wheel acceleration of any one of the wheels is greater than the acceleration wheel acceleration threshold value;
if yes, outputting alarm information;
If not, repeating the step of judging whether the acceleration speed in the acceleration state is greater than the acceleration speed threshold value and whether the acceleration wheel acceleration of any one of the wheels is greater than the acceleration wheel acceleration threshold value; and
Judging whether the coasting speed in the coasting state is greater than the coasting speed threshold value and whether the coasting wheel acceleration of any one of the wheels is greater than the coasting wheel acceleration threshold value;
if yes, outputting alarm information;
If not, repeating the step of judging whether the coasting speed in the coasting state is greater than the coasting speed threshold value and whether the coasting wheel acceleration of any one of the wheels is greater than the coasting wheel acceleration threshold value; wherein the method comprises the steps of
The range of the acceleration speed threshold is more than 30kph;
the range of the sliding vehicle speed threshold value is more than 60kph;
the range of the braking vehicle speed threshold value is more than 80kph;
The range of the acceleration threshold value of the acceleration wheel is more than 1.5 rad/s;
The range of the coaster wheel acceleration threshold is greater than 0.6 rad/s;
The range of the brake wheel acceleration threshold is less than-4 rad/s.
5. The method of tire wear monitoring as in claim 4, wherein the alert information comprises:
determining the tire position to be replaced according to the comparison result of the driving state information of each wheel and the corresponding tire wear parameter threshold value in the current driving state; and
After the step S3, the method further includes:
judging whether the driving state information of each wheel in each driving state is larger than 1.5 times of a corresponding tire wear parameter threshold value or not;
if yes, outputting alarm information to a braking system of the vehicle, and controlling the braking system to brake the vehicle;
If not, continuing to judge whether the driving state information of each wheel in each driving state is larger than 1.5 times of the corresponding tire abrasion parameter threshold value.
6. The method of monitoring tire wear as claimed in claim 5, wherein in the step S1, the vehicle condition information of the vehicle is acquired, and whether the road surface on which the vehicle is currently running is an unmonitored road surface is determined based on the vehicle condition information, comprising:
acquiring vehicle condition information of the vehicle by a preset first time threshold value, and judging whether the road surface on which the vehicle is currently running is an unmonitored road surface by a preset second time threshold value according to the vehicle condition information; wherein the method comprises the steps of
The duration of the first time threshold is less than or equal to the duration of the second time threshold.
7. A tire wear monitoring system for performing the tire wear monitoring method of any one of claims 1-6, comprising:
the information acquisition module acquires vehicle condition information, pedal information and driving state information of the vehicle;
the tire wear monitoring module judges whether the road surface on which the vehicle is currently running is an unmonitored road surface according to the vehicle condition information, and determines the current running state of the vehicle according to the pedal information when the road surface on which the vehicle is currently running is a monitorable road surface; and
The tire wear monitoring module also respectively compares the driving state information under each driving state with the magnitude of each tire wear parameter threshold value corresponding to each driving state, and outputs alarm information according to the comparison result; and
The vehicle condition information comprises wheel speed information, the current environment temperature of the vehicle, rainfall information and state information of a wiper system of the vehicle;
The pedal information comprises an accelerator pedal stroke and a brake pedal stroke;
the driving state information comprises an acceleration vehicle speed and an acceleration wheel acceleration in an acceleration state; the coasting speed and the coasting wheel acceleration in the coasting state; and a braking vehicle speed and a braking wheel acceleration in a braking state; and
The information acquisition module comprises a vehicle speed acquisition device, a wheel acceleration acquisition device, a temperature acquisition device, a rainfall sensor and a windscreen wiper state acquisition device; wherein the method comprises the steps of
The vehicle speed collector collects the acceleration vehicle speed, the coasting vehicle speed and the braking vehicle speed;
The wheel speed collector collects the wheel speed information;
The wheel acceleration collector collects the acceleration wheel acceleration, the coasting wheel acceleration and the braking wheel acceleration;
The temperature collector collects the current ambient temperature of the vehicle;
the rainfall sensor acquires the rainfall information;
the wiper state collector collects state information of a wiper system of the vehicle.
8. The tire wear monitoring system of claim 7, further comprising an alarm module;
And the alarm module outputs alarm information according to the driving state information and the tire abrasion parameter threshold value corresponding to each driving state under each driving state.
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