CN105539028A - Method and system for detecting gas leakage of automobile tire - Google Patents
Method and system for detecting gas leakage of automobile tire Download PDFInfo
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- CN105539028A CN105539028A CN201510872288.6A CN201510872288A CN105539028A CN 105539028 A CN105539028 A CN 105539028A CN 201510872288 A CN201510872288 A CN 201510872288A CN 105539028 A CN105539028 A CN 105539028A
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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
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
Abstract
The invention discloses a method and system for detecting the gas leakage of automobile tire. The method comprises the following steps: when automobile tires are in a normal state, collecting and storing the original tire pressures of four tires by a tire pressure sensor; and during the driving process, at intervals of predetermined time, comparing the realtime tire pressures with the corresponding original tire pressures. When the tire pressure difference between the realtime tire pressure and corresponding original tire pressure of a tire is larger than that of other tires and the tire pressure difference exceeds a preset threshold value, the tire has the phenomenon of gas leakage. The provided method determines slow gas leakage through tire pressure error. The values are compared for three times and finally checked for one time, at the same time, an accuracy error mode is combined, the alarm of slow gas leakage becomes more accurate, and the potential safety hazard is reduced.
Description
Technical field
The present invention relates to the tire pressure monitoring technical field of vehicle electric field, particularly relate to a kind of method and system detecting tyre leakage.
Background technology
In the traffic accident relating to personal casualty, wherein 46% is that tire causes, and central 70% is that deficency type accident of blowing out causes.Air pressure of automobile tire is not enough mainly underinflation or gas leakage cause, on ride safety of automobile impact comparatively large, and waste economically can be caused.When air pressure is not enough, except being subject to wound, also can there are cord fracture, peeling tread, cord stripping, two lateral wearings, accident of even blowing out in tire.Air pressure is not enough and make tire produce standing wave (standingvave) phenomenon, namely because the not enough vehicle of tire pressure in motion sweep have little time restore to the original state and produce tucking, this phenomenon makes rotation friction strengthen, and tire heat-dissipating is high, thus reduces tire intensity.
Meanwhile, tire is subdued deflection and is expanded, and after internal temperature raises, causes tread-rubber and carcass plies to depart from, easily blows out.Deflect excessive also can groove, sidewall produce be full of cracks and cords break phenomenon, accelerate tire shoulder abrasion, affect the service life of tire.In addition, tire is beated excessive, causes the exception of bead part and wheel rim to rub, causes tyre bead to damage, and produces potential safety hazard.
When tire pressure is low, the rolling resistance of tire strengthens, and will inevitably increase oil consumption.And the economic loss that tyre injury causes is great, many tire treads also chin-deep, just scraps because tire shoulder or sidewall damage serious, very unfortunately.Generally speaking, the ratio of lower tire pressure and normal tire pressure, the just ratio of tire life, if tire pressure is only 50% of normal tire pressure, so the life-span of tire can shorten to about 50% of tire normal service life.
In prior art, by increasing tire pressure monitoring equipment (TirePressuremonitoringSystem is called for short TPMS), directly can test tire pressure and the tire temperature of four tires of tire; By real-time tire pressure and temperature monitoring, realize the understanding to tire pressure and tire temperature; Exist if any rapid air leakage, then carry out prompting car owner;
But existing TPMS monitoring system can not be leaked gas to slow by accurate measurements, after can only certain pressure being reached, in the change of display end display pressure, if exceed low pressure limit threshold values, then remind; If penetrate the phenomenons such as tingle, tire tube valve be aging, the gas leakage of generation, cannot remind car owner's tire to there occurs slow gas leakage in time.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of the deficiencies in the prior art, the object of the invention is to provide a kind of method and system detecting tyre leakage, be intended to solve TPMS monitoring system in prior art can not leak gas to slow by accurate measurements, after can only certain pressure being reached, in the change of display end display pressure, if exceed low pressure limit threshold values, then remind; If penetrate the phenomenons such as tingle, tire tube valve are aging, the gas leakage of generation, car owner's tire cannot be reminded in time to have there occurs the defect of slow gas leakage.
Technical scheme of the present invention is as follows:
Detect a method for tyre leakage, wherein, method comprises:
A, in advance when motor tire is in normal condition, the original tire pressure of four tires of tire pressure sensor collection also stores;
B, in vehicle traveling process, the real-time tire pressure of four tires is gathered every a schedule time, respectively the real-time tire pressure of the tire of correspondence and original tire pressure are compared, the difference that other tires change is greater than when detecting difference that the real-time tire pressure of several tires and original tire pressure change, the threshold values preset more than one, then judge current tyre leakage.
The method of described detection tyre leakage, wherein, described step B specifically comprises:
B1, in vehicle traveling process, gather the real-time tire pressure of four tires every a schedule time;
B2, the real-time tire pressure of four tires to be compared with corresponding original tire pressure respectively;
B3, time to detect that the changing value of the real-time tire pressure of several tires and original tire pressure is more than a reservation threshold, then judge current tyre leakage when N continuous.
The method of described detection tyre leakage, wherein, also comprises after described step B:
C, when detection tyre leakage after, automobile mounted read-out points out user to keep in repair.
The method of the detection tyre leakage described in above-mentioned any one, wherein, described N is 4.
The method of described detection tyre leakage, wherein, described step B3 specifically comprises:
B31, when the changing value of real-time tire pressure and original tire pressure that several tires to be detected for continuous three times is more than a reservation threshold;
Whether the real-time tire pressure that B32, acquisition obtain for the 4th time and the difference of the real-time tire pressure of third time are greater than the trueness error of tire pressure sensor, if be greater than, judge tyre leakage.
Detect a system for tyre leakage, wherein, system comprises:
Prestore module, in advance when motor tire is in normal condition, the original tire pressure of four tires of tire pressure sensor collection also stores;
Gather and judge module, for in vehicle traveling process, the real-time tire pressure of four tires is gathered every a schedule time, respectively the real-time tire pressure of the tire of correspondence and original tire pressure are compared, the difference that other tires change is greater than when detecting difference that the real-time tire pressure of several tires and original tire pressure change, the threshold values preset more than one, then judge current tyre leakage.
The system of described detection tyre leakage, wherein, described collection and judge module specifically comprise:
Collecting unit, in vehicle traveling process, gathers the real-time tire pressure of four tires every a schedule time;
Contrast unit, for comparing the real-time tire pressure of four tires with corresponding original tire pressure respectively;
First judging unit, for the changing value of real-time tire pressure and original tire pressure that several tires time to be detected when N continuous more than a reservation threshold, then judges current tyre leakage.
The system of described detection tyre leakage, wherein, described Ore-controlling Role also comprises:
Reminding module, for when after detection tyre leakage, automobile mounted read-out points out user to keep in repair.
The system of the detection tyre leakage described in above-mentioned any one, wherein, described N is 4.
The system of described detection tyre leakage, wherein, described judging unit specifically comprises:
Detecting unit, for the changing value of the real-time tire pressure that several tires detected for three times when continuous and original tire pressure more than a reservation threshold;
Second judging unit, whether the difference obtaining real-time tire pressure and the real-time tire pressure of third time obtained for the 4th time is greater than the trueness error of tire pressure sensor, if be greater than, judges tyre leakage.
The invention provides a kind of method and system detecting tyre leakage, described method comprises: in advance when motor tire is in normal condition, and the original tire pressure of four tires of tire pressure sensor collection also stores; In vehicle traveling process, the real-time tire pressure of four tires is gathered every a schedule time, respectively the real-time tire pressure of the tire of correspondence and original tire pressure are compared, the difference that other tires change is greater than when detecting difference that the real-time tire pressure of several tires and original tire pressure change, the threshold values preset more than one, then judge current tyre leakage.The present invention determines slow gas leakage by tire pressure mode error, adds the 4th verification by three numerical value comparisons, in conjunction with trueness error mode, realizes slow leakage alarm more accurate, decreases potential safety hazard.
Accompanying drawing explanation
Fig. 1 is a kind of diagram of circuit detecting the preferred embodiment of the method for tyre leakage of the present invention.
Fig. 2 is a kind of diagram of circuit detecting the embody rule embodiment one of the method for tyre leakage of the present invention.
Fig. 3 is a kind of original tire pressure diagram of curves detecting the embody rule embodiment two of the method for tyre leakage of the present invention.
Fig. 4 is a kind of traveling tire pressure diagram of curves after one of them tire leaks air detecting the embody rule embodiment two of the method for tyre leakage of the present invention.
Fig. 5 is a kind of functional schematic block diagram detecting the preferred embodiment of the system of tyre leakage of the present invention.
Detailed description of the invention
For making object of the present invention, technical scheme and effect clearly, clearly, the present invention is described in more detail below.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of diagram of circuit detecting the preferred embodiment of the method for tyre leakage, as shown in Figure 1, described method comprises:
Step S100, in advance when motor tire is in normal condition, the original tire pressure of four tires of tire pressure sensor collection also stores.
During concrete enforcement, after four tire pressure work of automobile, by tire pressure sensor four tire pressure value, according to the tire pressure of four tires.Tire pressure sensor TPMS right in vehicle traveling process tire pressure carry out real-time automatic monitoring.Automobile stores after getting the original tire pressure of four tires.
Step S200, in vehicle traveling process, the real-time tire pressure of four tires is gathered every a schedule time, respectively the real-time tire pressure of the tire of correspondence and original tire pressure are compared, the difference that other tires change is greater than when detecting difference that the real-time tire pressure of several tires and original tire pressure change, the threshold values preset more than one, then judge current tyre leakage.
In further embodiment, described step S200 specifically comprises:
Step S201, in vehicle traveling process, gather the real-time tire pressure of four tires every a schedule time;
Step S202, the real-time tire pressure of four tires to be compared with corresponding original tire pressure respectively;
Step S203, time to detect that the changing value of the real-time tire pressure of several tires and original tire pressure is more than a reservation threshold, then judge current tyre leakage when N continuous.
In further embodiment, step S203 specifically comprises step and is:
Step S231, when the changing value of real-time tire pressure and original tire pressure that several tires to be detected for continuous three times is more than a reservation threshold;
Whether the real-time tire pressure that step S232, acquisition obtain for the 4th time and the difference of the real-time tire pressure of third time are greater than the trueness error of tire pressure sensor, if be greater than, judge tyre leakage.
During concrete enforcement, N is 4.During concrete enforcement, tire pressure sensor error: ± 2kPa.Under steam, with certain hour section, obtain following as table 1 test data; (by right rear fire be specially prick the slow gas leakage of nail do following test), during startup, pressure ensures and first reaches tire standards pressure requirements:
Table 1
| Time period | Front left Pressure/Temperature | Front right Pressure/Temperature | Rear left Pressure/Temperature | Rear right Pressure/Temperature |
| 1 | 220kPa/ 24℃ | 220kPa/ 24℃ | 210kPa/ 24℃ | 210kPa/ 23℃ |
| 2 | 221kPa/ 26℃ | 219kPa/ 26℃ | 209kPa/ 27℃ | 212kPa/ 25℃ |
| 3 | 221kPa/ 34℃ | 220kPa/ 35℃ | 206kPa/ 38℃ | 211kPa/ 34℃ |
| 4 | 222kPa/ 52℃ | 221kPa/ 54℃ | 202kPa/ 57℃ | 211kPa/ 53℃ |
| 5 | 222kPa/ 54℃ | 222kPa/ 52℃ | 198kPa/ 56℃ | 212kPa/ 50℃ |
| 6 | 222kPa/ 52℃ | 221kPa/ 50℃ | 195kPa/ 57℃ | 212kPa/ 51℃ |
Can be found out by the numerical value of actual measurement and based on the pressure comparison to other tires, can judge that rear left tire exists the phenomenon of slow gas leakage; For avoiding erroneous judgement, this algorithm is by judging three groups of Data Comparisons continuously, and the 4th time numerical value is verifying work, still occurs the change of this trend, then determine that rear left tire is slow gas leakage.
Further, also comprise after described step S200:
Step S300, when detection tyre leakage after, automobile mounted read-out points out user to keep in repair.
During concrete enforcement, after tyre leakage being detected, can on automobile mounted read-out, remind car owner's left rear tire to there is slow gas leak phenomenon, please check in time.And the maintenance point confession user maintenance that controlled navigating search processed is nearest.
Present invention also offers a kind of diagram of circuit detecting the embody rule embodiment one of the method for tyre leakage, as shown in Figure 2, described method comprises:
Automotive tire pressure value when step S10, the start of acquisition automobile;
Step S20, judge whether real-time tire pressure is less than original tire pressure, if so, then perform step S30, if not, then perform step S40;
Step S30, detect real-time tire pressure and reduce by three times continuously;
Step S40, not process;
Step S50, when detecting that the 4th tire pressure changes, and change is more than the tire pressure error limit of TPMS;
Step S60, reminding user automobile leak gas slowly.
Present invention also offers in the embody rule embodiment two of the method detecting tyre leakage, among tire running process, the variable effect of temperature, tire pressure is not immobilize, especially along with the traveling of vehicle, tire pressure is corresponding can produce certain change; Based on the conformability of four tire runnings, tyre temperature causes the change of pressure, based on this change,
After gathering four tire pressure work respectively, determine four tire pressure value, generate a curve according to the tire pressure of four tires; Specifically as shown in Figure 3.For automobile has just started original tire pressure diagram of curves when travelling.
Carry out the coupling of curve according to the data of real-time Transmission, generate real-time tire pressure diagram of curves, as shown in Figure 4, if changed by curve, exceed a definite limitation, then can judge that a certain tire or several tire there occurs slow gas leakage.
Embody rule embodiment, adopts the difference curve of four corresponding changes coupling to have following benefit:
A. for the algorithm of slow gas leakage installing tire pressure monitoring system, according to the difference curve of tire four the corresponding changes change of other tire pressure value (or relatively) coupling, quick lock in leaks gas concrete tire slowly;
B. along with tire running, the corresponding change of temperature, the mode of being leaked gas slowly by the pressure change calculations that four tires are corresponding;
C. determine slow gas leakage simply by tire pressure mode error, be easily subject to temperature impact, add the 4th verification by three numerical value comparisons, in conjunction with trueness error mode, realize slow leakage alarm more accurate.
On the basis of said method embodiment, present invention also offers a kind of functional schematic block diagram detecting the preferred embodiment of the system of tyre leakage, as shown in Figure 5, described system comprises:
Prestore module 100, in advance when motor tire is in normal condition, the original tire pressure of four tires of tire pressure sensor collection also stores; As detailed above.
Gather and judge module 200, for in vehicle traveling process, the real-time tire pressure of four tires is gathered every a schedule time, respectively the real-time tire pressure of the tire of correspondence and original tire pressure are compared, the difference that other tires change is greater than when detecting difference that the real-time tire pressure of several tires and original tire pressure change, the threshold values preset more than one, then judge current tyre leakage; As detailed above.
The system of described detection tyre leakage, wherein, described collection and judge module specifically comprise:
Collecting unit, in vehicle traveling process, gathers the real-time tire pressure of four tires every a schedule time; As detailed above.
Contrast unit, for comparing the real-time tire pressure of four tires with corresponding original tire pressure respectively; As detailed above.
First judging unit, for the changing value of real-time tire pressure and original tire pressure that several tires time to be detected when N continuous more than a reservation threshold, then judges current tyre leakage; As detailed above.
The system of described detection tyre leakage, wherein, described Ore-controlling Role also comprises:
Reminding module, for when after detection tyre leakage, automobile mounted read-out points out user to keep in repair; As detailed above.
The system of the detection tyre leakage described in above-mentioned any one, wherein, described N is 4; As detailed above.
The system of described detection tyre leakage, wherein, described judging unit specifically comprises:
Detecting unit, for the changing value of the real-time tire pressure that several tires detected for three times when continuous and original tire pressure more than a reservation threshold; As detailed above.
Second judging unit, whether the difference obtaining real-time tire pressure and the real-time tire pressure of third time obtained for the 4th time is greater than the trueness error of tire pressure sensor, if be greater than, judges tyre leakage; As detailed above.
In sum, the invention provides a kind of method and system detecting tyre leakage, described method comprises: in advance when motor tire is in normal condition, and the original tire pressure of four tires of tire pressure sensor collection also stores; In vehicle traveling process, the real-time tire pressure of four tires is gathered every a schedule time, respectively the real-time tire pressure of the tire of correspondence and original tire pressure are compared, the difference that other tires change is greater than when detecting difference that the real-time tire pressure of several tires and original tire pressure change, the threshold values preset more than one, then judge current tyre leakage.The present invention determines slow gas leakage by tire pressure mode error, adds the 4th verification by three numerical value comparisons, in conjunction with trueness error mode, realizes slow leakage alarm more accurate, decreases potential safety hazard.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (10)
1. detect a method for tyre leakage, it is characterized in that, method comprises:
A, in advance when motor tire is in normal condition, the original tire pressure of four tires of tire pressure sensor collection also stores;
B, in vehicle traveling process, the real-time tire pressure of four tires is gathered every a schedule time, respectively the real-time tire pressure of the tire of correspondence and original tire pressure are compared, the difference that other tires change is greater than when detecting difference that the real-time tire pressure of several tires and original tire pressure change, the threshold values preset more than one, then judge current tyre leakage.
2. the method for detection tyre leakage according to claim 1, is characterized in that, described step B specifically comprises:
B1, in vehicle traveling process, gather the real-time tire pressure of four tires every a schedule time;
B2, the real-time tire pressure of four tires to be compared with corresponding original tire pressure respectively;
B3, time to detect that the changing value of the real-time tire pressure of several tires and original tire pressure is more than a reservation threshold, then judge current tyre leakage when N continuous.
3. the method for detection tyre leakage according to claim 2, is characterized in that, also comprises after described step B:
C, when detection tyre leakage after, automobile mounted read-out points out user to keep in repair.
4. the method for the detection tyre leakage according to any one of claim 1-3, is characterized in that, described N is 4.
5. the method for detection tyre leakage according to claim 4, is characterized in that, described step B3 specifically comprises:
B31, when the changing value of real-time tire pressure and original tire pressure that several tires to be detected for continuous three times is more than a reservation threshold;
Whether the real-time tire pressure that B32, acquisition obtain for the 4th time and the difference of the real-time tire pressure of third time are greater than the trueness error of tire pressure sensor, if be greater than, judge tyre leakage.
6. detect a system for tyre leakage, it is characterized in that, system comprises:
Prestore module, in advance when motor tire is in normal condition, the original tire pressure of four tires of tire pressure sensor collection also stores;
Gather and judge module, for in vehicle traveling process, the real-time tire pressure of four tires is gathered every a schedule time, respectively the real-time tire pressure of the tire of correspondence and original tire pressure are compared, the difference that other tires change is greater than when detecting difference that the real-time tire pressure of several tires and original tire pressure change, the threshold values preset more than one, then judge current tyre leakage.
7. the system of detection tyre leakage according to claim 6, is characterized in that, described collection and judge module specifically comprise:
Collecting unit, in vehicle traveling process, gathers the real-time tire pressure of four tires every a schedule time;
Contrast unit, for comparing the real-time tire pressure of four tires with corresponding original tire pressure respectively;
First judging unit, for the changing value of real-time tire pressure and original tire pressure that several tires time to be detected when N continuous more than a reservation threshold, then judges current tyre leakage.
8. the system of detection tyre leakage according to claim 7, is characterized in that, described Ore-controlling Role also comprises:
Reminding module, for when after detection tyre leakage, automobile mounted read-out points out user to keep in repair.
9. the system of the detection tyre leakage according to any one of claim 6-8, is characterized in that, described N is 4.
10. the system of detection tyre leakage according to claim 9, is characterized in that, described judging unit specifically comprises:
Detecting unit, for the changing value of the real-time tire pressure that several tires detected for three times when continuous and original tire pressure more than a reservation threshold;
Second judging unit, whether the difference obtaining real-time tire pressure and the real-time tire pressure of third time obtained for the 4th time is greater than the trueness error of tire pressure sensor, if be greater than, judges tyre leakage.
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| CN201510872288.6A CN105539028A (en) | 2015-12-02 | 2015-12-02 | Method and system for detecting gas leakage of automobile tire |
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| CN201510872288.6A CN105539028A (en) | 2015-12-02 | 2015-12-02 | Method and system for detecting gas leakage of automobile tire |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107239831A (en) * | 2017-07-04 | 2017-10-10 | 中国计量大学 | A kind of tire whether detection method, detecting system and the detection means of gas leakage |
| CN110065350A (en) * | 2019-05-07 | 2019-07-30 | 吉旗（成都）科技有限公司 | Lorry traffic safety monitoring method and system |
| CN110525139A (en) * | 2019-09-18 | 2019-12-03 | 上海航盛实业有限公司 | A kind of multifunctional tyre pressure monitor |
| CN112129464A (en) * | 2020-09-23 | 2020-12-25 | 於利萍 | Automobile tire leak protection gas detection mechanism of self-adaptation tire internal diameter |
| CN112477529A (en) * | 2020-11-30 | 2021-03-12 | 浙江吉利控股集团有限公司 | Tire pressure compensation device, method and system |
| CN113147281A (en) * | 2021-06-07 | 2021-07-23 | 浙江工业大学 | Tire pressure detection system and method |
| CN113232462A (en) * | 2021-05-20 | 2021-08-10 | 上海仙塔智能科技有限公司 | Tire pressure management method, device and computer storage medium |
| CN113580854A (en) * | 2021-08-30 | 2021-11-02 | 重庆长安汽车股份有限公司 | Vehicle tire pressure monitoring and reminding system and method |
| CN113635716A (en) * | 2021-08-04 | 2021-11-12 | 岚图汽车科技有限公司 | Tire pressure automatic control method and device and vehicle |
| CN114559775A (en) * | 2022-03-31 | 2022-05-31 | 中国第一汽车股份有限公司 | Automobile tire abnormity identification system and identification method |
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| CN105946746A (en) * | 2016-04-29 | 2016-09-21 | 大连楼兰科技股份有限公司 | Auxiliary method and system for dealing with tire slow air leakage |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107239831A (en) * | 2017-07-04 | 2017-10-10 | 中国计量大学 | A kind of tire whether detection method, detecting system and the detection means of gas leakage |
| CN110065350A (en) * | 2019-05-07 | 2019-07-30 | 吉旗（成都）科技有限公司 | Lorry traffic safety monitoring method and system |
| CN110525139A (en) * | 2019-09-18 | 2019-12-03 | 上海航盛实业有限公司 | A kind of multifunctional tyre pressure monitor |
| CN112129464A (en) * | 2020-09-23 | 2020-12-25 | 於利萍 | Automobile tire leak protection gas detection mechanism of self-adaptation tire internal diameter |
| CN112477529A (en) * | 2020-11-30 | 2021-03-12 | 浙江吉利控股集团有限公司 | Tire pressure compensation device, method and system |
| CN113232462A (en) * | 2021-05-20 | 2021-08-10 | 上海仙塔智能科技有限公司 | Tire pressure management method, device and computer storage medium |
| CN113232462B (en) * | 2021-05-20 | 2022-12-02 | 上海仙塔智能科技有限公司 | Tire pressure management method, device and computer storage medium |
| CN113147281A (en) * | 2021-06-07 | 2021-07-23 | 浙江工业大学 | Tire pressure detection system and method |
| CN113635716A (en) * | 2021-08-04 | 2021-11-12 | 岚图汽车科技有限公司 | Tire pressure automatic control method and device and vehicle |
| CN113580854A (en) * | 2021-08-30 | 2021-11-02 | 重庆长安汽车股份有限公司 | Vehicle tire pressure monitoring and reminding system and method |
| CN114559775A (en) * | 2022-03-31 | 2022-05-31 | 中国第一汽车股份有限公司 | Automobile tire abnormity identification system and identification method |
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