CN101961972B - Automobile tire pressure detection method - Google Patents
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- CN101961972B CN101961972B CN201010264549.3A CN201010264549A CN101961972B CN 101961972 B CN101961972 B CN 101961972B CN 201010264549 A CN201010264549 A CN 201010264549A CN 101961972 B CN101961972 B CN 101961972B
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Abstract
The present invention relates to air pressure of automobile tire detection technique field, refer to especially the method that judges air pressure of automobile tire situation of change by calculating automobile tire rotating speed and comparative analysis, to understand in time air pressure of automobile tire, prevent contingency. The technical program remains according to an automobile tire carries out tire rotational speed sampling in traveling process, measure or calculate and set up a set of rotary speed data, again according to the energy-saving comparison of each tire rotational speed of set up data and Real-time Obtaining, thus the barometric information of measuring and calculating place tire. But be at the beginning of the present invention's improvement, the present invention has introduced a reference value R, the numerical value that tire pressure is judged need to, through R screening, screen the data that gather by R, more accurate to the warning of tire pressure like this.
Description
Technical field:
The present invention relates to air pressure of automobile tire detection technique field, refer to especially by calculate automobile tire rotating speed andComparative analysis and judge the method for air pressure of automobile tire situation of change, to understand in time air pressure of automobile tire, preventsAccident beyond occurring.
Background technology:
Automobile is in the process of travelling, if there is tyre leakage, if driver can not connect automobile in real timeThe gas leakage situation of tire has not only been wasted fuel in enforcement, also has the hidden danger of contingency. Therefore driveThe barometric information that member understands automobile tire is in real time very necessary, is also very important.
The technical scheme at present air pressure of automobile tire being detected is mainly by loading pressure sensor, tire pressure to be enteredRow detects in real time, and carries out leakage alarm according to measured numerical values recited. But this technical scheme existsUnder friction speed, easily there is the defect of false alarm.
In addition, also have technical scheme tire pressure being judged by tire rotational speed, this scheme is by obtaining wheelTire rotary speed data, and all kinds of tire rotational speed data are calculated, it is right to be undertaken by result of calculation and default numerical valueRatio, thus draw the situation of the each tire pressure of automobile. But also there is defect in this tire pressure measuring technique scheme,When only occurring that to single tire air pressure is not enough, it reports to the police, when two or more tires all exist gasWhile pressing not enough situation, this technical scheme cannot be reported to the police to air pressure deficiency, and this technical scheme exists oneFixed deficiency. For example: under motoring condition, in the situation that speed per hour is V, automobile is left front, right front, leftAfterwards, the rotating speed of right rear fire is respectively V1, V2, V3, V4, in the time that the air pressure of the some tires of automobile is not enough,Suppose the air pressure deficiency of left front tire,, in actual travel process, the rotating speed V1 of left front tire is greater than off-front wheelTire rotating speed V2, and difference between V1, V2 exceeded the default amount of deflection, so just can detectWhen the air pressure of automobile left front tire occurs not enough. But, when the not enough situation of air pressure all appears in left front, right front fireTime, may occur that difference between V1, V2 still in default deviation range, now just cannot examineMeasure the situation that air pressure deficiency appears in automobile tire, this driver brings potential safety hazard.
For above-mentioned situation, the inventor once proposed a kind of novel technical scheme, saw Chinese Patent Application No.For: 200810218584.4 Chinese invention patent prospectus, it discloses a kind of " automobile tyre airPress the monitoring method changing and realize the system of this monitoring method ". This technical scheme is: according to automobile, each is taken turnsTire carries out tire rotational speed sampling in traveling process, measure or calculate and set up a set of rotary speed data, then according to buildEach tire rotational speed of vertical data and Real-time Obtaining compares, thereby calculates the barometric information of tire, andAnd the situation when tire that can calculate two or more occurs that air pressure is not enough simultaneously, and show this twoParticular location individual or more than two tire. Why this technical scheme can overcome the deficiencies in the prior art,Because it is not the rotating speed that directly contrasts each tire, but comparing with value diverse location tire rotational speed, so just can avoid in the time that two or more tires all exist the situation of air pressure deficiency existing skillThe situation that art scheme cannot be reported to the police to air pressure deficiency.
In addition, the inventor finds in to actual use procedure, and above-mentioned technical scheme also exists certainFoot, for example, when automobile is in the time turning greatly or four-wheel speed cannot keep balance, the data that now detect justLikely monitoring result is produced to wrong judgement, this driver brings unnecessary trouble. To this, the present inventionPeople proposes following technical scheme, to overcome the deficiencies in the prior art.
Summary of the invention:
Technical problem to be solved by this invention is exactly the deficiency existing in current technical scheme in order to overcome, and proposesA kind of testing result automobile tire pressure detection method more accurately.
For solving the problems of the technologies described above, the present invention has adopted following technical scheme: the method comprises the steps:(1), obtain reference value R, gather four wheels of the automobile of some groups of automobile speed per hours in 50-90 kilometer velocity shootingThe data of tire speed, and bring the speed data of four tires in every group of data into following formula and calculate: R=(FL+BL)-(FR+BR), wherein FL is that the near front wheel speed, BL are that off hind wheel speed, FR are right frontWheel speed, BR are off hind wheel speed; (2) mean value of the some R values that, obtain in calculation procedure (1)R1; (3), repeating step (1) obtains another data R2, if the numerical value of R1, R2 is at default deviation modelIn enclosing, using R1, R2 mean value as reference value R; If the numerical value of R1 or R2 has exceeded default deviationScope, repeating step (1) obtains new mean value; If repeatedly still cannot obtain in default deviationR numerical value in scope, using the mean value of the data that repeatedly obtain as reference value R; The reference value of obtainingR determines a deviation range, and the data in deviation range are valid data; (4), obtain judgment value D, adoptThe some groups of automobile speed per hours that collection obtains after the reference value R screening in above-mentioned tool Limit of J-validity are at 50-90The data of four tire speed of automobile in kilometer velocity shooting, and by the speed data of four tires in every group of dataBringing following formula into calculates: D=(FL+BR)-(FR+BL); (5), in calculation procedure (4)The mean value D1 of the some D values that obtain; (6), repeating step (4) obtains other several data Dn, ifThe numerical value of D1, Dn is in default deviation range, using D1, Dn mean value as reference value D; If D1Or the numerical value of Dn exceeded default deviation range, repeating step (4) obtains new mean value; If repeatRepeatedly still cannot obtain the D numerical value in default deviation range, the mean value of the data that repeatedly obtain be doneFor judgment value D; (7), start to judge that whether vehicle tire pressure is normal, four tires of enforcement some groups of automobiles of collectionThe data of speed, and bring the speed data of four tires in every group of data into following formula and calculate: D '=(FL+BR)-(FR+BL); (9), determine the speed of a motor vehicle section at the D ' place that calculates, with respectivelyCompare with the judgment value D in friction speed section in step (6), if there is multi-group data D ' with itDifference between corresponding D has exceeded preset value, reports to the police.
In technique scheme, when the judgment value D that step (6) obtains deducts a correction value as automobileSpeed is being less than 50 kilometers of judgment value D in velocity shooting; Using the judgment value D obtaining add a correction value asAutomobile speed per hour is being greater than 90 kilometers of judgment value D in velocity shooting;
In technique scheme, in step (1), while obtaining reference value R, at least 4 group data are gathered altogether.
In technique scheme, in step (3), the default deviation range of R numerical value is 0.42 meter per second; R referenceThe deviation range of the valid data of value is | 0.28| meter per second.
In technique scheme, in step (3), the number of times of repeated acquisition data is at least 6 times, if be repeated toFew R numerical value that still cannot obtain in default deviation range for 6 times, using the mean value of the data that obtain asReference value R.
In technique scheme, in step (6), the default deviation range of D numerical value is 0.042 meter per second; RepeatThe number of times of image data is at least 6 times, still cannot obtain in default deviation range if repeat at least 6 timesD numerical value, using the mean value of the data that obtain as reference value D.
In technique scheme, described judgment value D deducts a correction value and is being less than 50 as automobile speed per hourJudgment value D in kilometer velocity shooting; Judgment value D adds that a correction value is being greater than 90 public affairs as automobile speed per hourIn judgment value D in velocity shooting, it is 0.056 meter per second that described judgment value D deducts correction value; Judgment value DThe correction value adding is 0.197 meter per second.
The present invention adopts after technique scheme, and the technical program remains according to an automobile tire and advancingIn journey, carry out tire rotational speed sampling, measure or calculate and set up a set of rotary speed data, then according to set up data withEach tire rotational speed of Real-time Obtaining compares, thereby calculates the barometric information of tire. But the present invention changesEnter part and be, the present invention has introduced a reference value R, the numerical value that tire pressure is judged be need throughCross R screening, by R, the data that gather are screened, more accurate to the warning of tire pressure like this.
In addition, the present invention distinguishes the different speed of a motor vehicle, tire pressure is reported to the police more accurate, avoids occurring mistakeAlarm. Acquisition process to the judgment value D that judges air pressure improves, and has shortened its acquisition time, carries simultaneouslyThe high precision of obtaining.
Brief description of the drawings:
Fig. 1 is the flow chart that in the present invention, reference value R obtains;
Fig. 2 is the flow chart that in the present invention, judgment value D obtains;
Fig. 3 is the implementation method flow chart of the specific embodiment of the invention;
Fig. 4 is the flow chart of test subroutine in Fig. 3;
Fig. 5 is the circuit diagram of specific embodiment of the invention testing circuit;
Fig. 6 is tire vehicle speed measurement circuit diagram in the specific embodiment of the invention.
Detailed description of the invention:
The present invention is to needing to quote two numerical value: reference value R and judgment value in automobile tire pressure detection methodD. Wherein judgment value D need to just can obtain after reference value R screening, and all judgment value DIt is the judgement through R.
The effect of reference value R: reference value R gathers after N four-wheel signal, brings computing formula R=into(FL+BL)-result of (FR+BR) obtaining, wherein FL be the near front wheel speed, BL be off hind wheel speed,FR is that off-front wheel speed, BR are off hind wheel speed. Can be large automobile turning or four-wheel by reference to value RSpeed cannot keep equilibrium criterion to remove, the alarm that the present invention can not be made a mistake in the time judging tire pressure.
So that obtain reference value R accurately, R in acquisition process only in the time of the velocity shooting of Second RegionImage data. The present invention is divided into three velocity shootings the speed of a motor vehicle, wherein:
First district's velocity shooting speed of a motor vehicle is less than 50 kilometers/hour
The Second Region velocity shooting speed of a motor vehicle is 50-90 kilometers/hour
The San district velocity shooting speed of a motor vehicle is greater than 90 kilometers/hour
Referring to Fig. 1, be below the flow process of obtaining of reference value R, be also called the learning process of R value:
1, gather the data of 15 groups of N pulses in speed per hour 50-90 kilometer velocity shooting, be averaging conductReference value R, the numerical value of N can be arbitrary data, but conventionally in order to ensure fetched dataAccuracy, N is at least 4, in the present embodiment, N is 15;
2, in gatherer process, 15 groups of R1 that data calculate that gather for the first time, its speed is inclined to one sideDifference is less than 0.042m/s, and this 0.042m/s is the default deviation range obtaining according to experimental calculation.If the numerical value of R1 in default deviation range, gathers 15 groups of data again, and calculateObtain the R2 of mean value. If the numerical value of R2 also, in default deviation range, calculatesThe mean value of R1 and R2, and using this mean value as reference value R. If R2 is greater than 0.042m/s,Again collect data and work as and default above deviation range comparison, if its numerical value is less thanWhen 0.042m/s can with R1 computing reference value R. But, all do not exist if gathered 6 groupsIn default deviation range, so 6 groups of data are on average worth to R as reference.
3, after reference value R determines, in the scope of ± 0.28m/s, be valid data, exceed for invalid data. ?The deviation range of the valid data of R reference value is | 0.28| meter per second.
In the time of follow-up definite judgment value D, the N that gathers data after R is judged as valid data, just can enterRow adds up and judges D value, and all data of D value all will be through the judgement of R.
Above-mentioned said reference value R, as follows in the R of perfect condition value deviation
Overgauge R=0.28m/s
Center line R=0
Minus deviation R=-0.28m/s
At desirable status circuit, in when operation, to take turns signal input all identical all the time due to 4, thereby R=((FL+BL)-(FR+BR))=0, when system is got reference value, getting in this state R=± 0.28m/s is valid data.
And in reality system running because the difference of external condition, may be under optimal condition RReference value also cannot equal 0, for example, and in real process, R=((FL+BL)-(FR+BR))=0.07m/s,The four-wheel signal of running input is also the right and left fluctuation at 0.07m/s all the time, instead of in 0 value twoSide wave is moving. Thereby the reference value of R is actually the system actual center line in when operation. Get N pulse in programValid data time will be taking R=0.07m/s ± 0.28m/s as valid data! As follows, dotted line is actual center lineReference value R=0.056m/s, has the later actual span of reference value between upper and lower two dotted linesNumerical value is only Effective Numerical.
Virtual condition R value deviation
Next, need to obtain judgment value D, the effect of judgment value D is to judge that whether tire pressure is normal,It is to gather through R value to screen the four-wheel signal valid data of 15 groups of N pulses that obtain, by formula:D=(FL+BR)-(FR+BL) rear gained of calculating. In the time obtaining judgment value D, need equally to gatherThe four-wheel signal data of 15 groups of N pulses, but these data must be through the judgement of R value. First calculate thisThe corresponding reference value R ' of a little image data, compares this reference value and the R value of obtaining above, ifWithin the scope of the Effective Numerical of R ' in above-mentioned R value, the data that gathered are effective. So obtain 15 groups of numbersAccording to the calculating of carrying out judgment value D.
The data of collecting when speed per hour 50-90 kilometer that D value is only travelled in Second Region in learning process areEffectively, in the time having learnt D value, obtained Second Region judgment value is deducted to 0.056m/s as the firstth districtJudgment value, adds the judgment value of 0.197m/s as San district using Second Region judgment value. When carrying out tire pressureWhen judgement, Real-time Collection to 15*N pulse data compare with D judgment value, its result is as tireThe foundation whether air pressure is abnormal.
Referring to Fig. 2, be below the acquisition process of judgment value D, be also called the learning process of D value.
1, gather instantaneous four-wheel signal data, every group of data through reference value R relatively after, filtered outThe data of effect, generally gather 15 groups of valid data.
2,15 groups of data are all added, then bring formula into and calculate, formula: D=(FL+BR)-(FR+BL) calculate rear gained.
3, determine the speed subregion at D place, obtain four groups of data of this subregion, and calculate its mean valueDAVE。
4, obtain one group of data at every turn just catch up with once and compare, if result is less than 0.042m/sJust the mean value of these two numerical value as reference value.
If 5 have relatively all failed result for 5 times, so using 6 data sentencing as D of averagingDisconnected value.
Obtaining after judgment value D, just can whether normally judge the tire pressure of automobile. It is sentencedDisconnected process is as follows:
The data of four tire speed of 15 groups of automobiles of Real-time Collection, and by the speed of four tires in every group of dataData are brought following formula into and are calculated: D '=(FL+BR)-(FR+BL); Definite calculatingThe speed of a motor vehicle section at D ' place, then respectively with the above-mentioned friction speed section of obtaining in judgment value D compare,If there is multi-group data D ' with it the difference between corresponding D exceeded preset value, report to the police. ExampleAs, D ' with it the difference between corresponding D exceeded preset value 0.037m/s, counter adds 1, when sentencingBreaking, it is continuous while being greater than 0.037m/s three times, and carries out pre-alarm, reminds driver to note. If comparative resultThe double 0.075m/s that is greater than, reports to the police, and illustrates that air pressure of automobile tire is undesired.
Above-mentioned judgment value D may begin during by the computing of D=(FL+BR)-(FR+BL) under normal conditionMaintain eventually within the scope of a deviate, reference value is exactly the D value of place subregion will be got to a mean value,And in fact this mean value be exactly the medium line of D value distribution, D value is all the time etc. in the ideal situationIn 0, and that actual conditions are system works is normal all the time, but because each road signal when normal, still depositIn deviation, the result of computing D is fluctuateed in the scope of certain value, instead of fluctuate in 0 scope,And the establishment of reference value is exactly the center line of determining D. And in the time that a certain road signal breaks down, just there will be partiallyFrom the more situation of this reference value.
The D deviation of perfect condition
Overgauge D=0.075m/s
Overgauge D=0.037m/s
Center line D=0
Minus deviation D=-0.037m/s
Minus deviation=-0.075m/s
The D deviation of virtual condition
See Fig. 3,5,6, this is a specific embodiment of the present invention, and its trace routine is as follows:
Press beginning, trace routine brings into operation, program initialization. Press corresponding learning key, if buttonResponse time exceedes 0.5 second, enters detection subprogram, if the time does not exceed 0.5 second, buzzerRing 0.5 second, indicator lamp is green, orange, red takes turns sudden strain of a muscle once. Next, green light corresponding to study mark, pre-Orange lamp corresponding to alarm flag is bright, buzzer ring 5 seconds, the when red that warning label is corresponding, buzzer ring 10Second.
Next, data are initialized, gather corresponding data, obtain reference value R.
Next, gather corresponding data, obtain judgment value D.
Next, gather real-time tire data, and contrast with above-mentioned judgment value D, judge whether to be greater than 0.037Meter per second, if there is continuously 0.037 meter per second three times, enters next step.
If there is being continuously greater than for twice 0.075 meter per second, proceed to alarm condition, the red light that warning label is correspondingBright. If not, double 0.075 meter per second that is greater than, proceeds to pre-alarm state, pre-alarm mark correspondenceOrange lamp bright. If be once greater than 0.075 meter per second, be once less than 0.075 meter per second, carry out equally pre-alarm.
In said procedure, added one and detected subprogram, as shown in Figure 4, it is to judge whether automobileThe judgement bringing into operation.
See Fig. 5,6, the circuit of the present embodiment is connected with the dc source of automobile by power end POWER,After voltage stabilizing, export after filtering. Wherein in this power circuit, be provided with F1 resettable fuse and diodeD1, D2 are with holding circuit.
In central processor core U1 in this circuit, comprise electrification reset, power-off reset circuit, its inner toolHave EPROM (can rewrite memory), for store data, even if circuit does not have electricity, the data of storing alsoCan not lose. This testing circuit is connected with the measuring circuit in Fig. 6 by interface, in measuring circuit, will examine respectivelyThe speed of four tires surveying respectively after amplifier U5A, U5B, U5C, U5D amplify, then is passed throughAfter U6A, U6B, U6C, U6D filter shape, become pulse signal FL, FR, BL, BR are input toTesting circuit for detection of, judgement.
Certainly, the foregoing is only example of the present invention, is not to limit the scope of the present invention, allThe equivalence of doing according to structure, feature and principle described in the present patent application the scope of the claims changes or modifies, and all should wrapDraw together in the present patent application the scope of the claims.
Claims (4)
1. automobile tire pressure detection method, is characterized in that: the method comprises the steps:
(1), obtain reference value R, gather the data of automobile four tire speed of some groups of automobile speed per hours in 50-90 kilometer velocity shooting, and bring the speed data of four tires in every group of data into following formula and calculate: R=(FL+BL)-(FR+BR), wherein FL is that the near front wheel speed, BL are that left rear wheel speed, FR are that off-front wheel speed, BR are off hind wheel speed;
(2) the mean value R1 of some numerical value that, in calculation procedure (1), formula obtains;
(3), repeating step (1), step (2) obtain another data R2, if the numerical value of R1, R2 in default deviation range,, using R1, R2 mean value as with reference to value R, this default deviation range is 0.42 meter per second; If the numerical value of R1 or R2 has exceeded default deviation range, repeating step (1) obtains new mean value; If repeatedly still cannot obtain R1 in default deviation range or the numerical value of R2, using the mean value of the data that repeatedly obtain as with reference to value R; The reference value R obtaining determines a deviation range, and the data in deviation range are valid data, and the deviation range of the valid data of reference value R is | 0.28| meter per second;
(4), obtain judgment value D, gather the data of automobile four tire speed of some groups of automobile speed per hours that obtain in 50-90 kilometer velocity shooting after the above-mentioned reference value R screening having in Limit of J-validity, and bring the speed data of four tires in every group of data into following formula and calculate: D=(FL+BR)-(FR+BL), wherein FL is that the near front wheel speed, BL are that left rear wheel speed, FR are that off-front wheel speed, BR are off hind wheel speed;
(5) the mean value D1 of some numerical value that, in calculation procedure (4), formula obtains;
(6), repeating step (4), step (5) obtain other several data Dn, if the numerical value of D1, Dn is in default deviation range, using D1, Dn mean value as judgment value D; If the numerical value of D1 or Dn has exceeded default deviation range, repeating step (4) obtains new mean value, and this default deviation range is 0.042 meter per second; If repeatedly still cannot obtain D1 or Dn numerical value in default deviation range, using the mean value of the data that repeatedly obtain as judgment value D; Described step (6) obtains after judgment value D, the judgment value D obtaining must be deducted a correction value as automobile speed per hour being less than 50 kilometers of judgment value D in velocity shooting; Using the judgment value D obtaining add a correction value as automobile speed per hour being greater than 90 kilometers of judgment value D in velocity shooting;
In this step, the number of times of repeated acquisition data is at least 6 times, still cannot obtain the numerical value in default deviation range if repeat at least 6 times, using the mean value of the data that obtain as judgment value D;
(7), start to judge that whether vehicle tire pressure is normal, the data of four tire speed of some groups of automobiles of Real-time Collection, and bring the speed data of four tires in every group of data into following formula and calculate:
D’＝(FL+BR)-(FR+BL)；
(8), determine the speed of a motor vehicle section at the D ' place calculating, with respectively with step (6) in judgment value D in friction speed section compare, if there is multi-group data D ' with it the difference between corresponding judgment value D exceeded preset value, report to the police.
2. automobile tire pressure detection method according to claim 1, is characterized in that: in step (1), while obtaining reference value R, gathered altogether at least 4 group data.
3. automobile tire pressure detection method according to claim 1, it is characterized in that: in step (3), the number of times of repeated acquisition data is at least 6 times, still cannot obtain the numerical value in default deviation range if repeat at least 6 times, using the mean value of the data that obtain as reference value R.
4. automobile tire pressure detection method according to claim 1, is characterized in that: the judgment value D described in step (6) deduct a correction value as automobile speed per hour being less than 50 kilometers of judgment value D in velocity shooting; Judgment value D add a correction value as automobile speed per hour being greater than 90 kilometers of judgment value D in velocity shooting; The correction value that described judgment value D deducts is 0.056 meter per second; The correction value that judgment value D adds is 0.197 meter per second.
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| CN201010264549.3A CN101961972B (en) | 2010-08-26 | 2010-08-26 | Automobile tire pressure detection method |
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| CN201010264549.3A CN101961972B (en) | 2010-08-26 | 2010-08-26 | Automobile tire pressure detection method |
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| CN101961972B true CN101961972B (en) | 2016-05-25 |
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| CN201010264549.3A Expired - Fee Related CN101961972B (en) | 2010-08-26 | 2010-08-26 | Automobile tire pressure detection method |
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| CN110840430B (en) * | 2018-08-21 | 2022-09-13 | 北京万生人和科技有限公司 | Intra-abdominal pressure data screening method, computer-readable storage medium, and intra-abdominal pressure data screening device |
| CN115615181A (en) * | 2022-09-30 | 2023-01-17 | 广东利元亨智能装备股份有限公司 | Moisture detection method and baking device |
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| US4876528A (en) * | 1987-05-13 | 1989-10-24 | Sp Tyres Uk Limited | Method of detecting a deflated tire on a vehicle |
| US5252946A (en) * | 1990-12-06 | 1993-10-12 | Sumitomo Rubber Industries Limited | Method of detecting a deflated tire on a vehicle |
| US6439045B1 (en) * | 1997-05-23 | 2002-08-27 | Continental Teves Ag & Co., Ohg | Method for using time measurements for detecting pressure loss in vehicle tires |
| CA2439359A1 (en) * | 2001-02-26 | 2002-09-06 | Toyota Jidosha Kabushiki Kaisha | Tire information obtaining device, method for obtaining tire information and tire information obtaining program |
| EP1640189A2 (en) * | 2004-09-24 | 2006-03-29 | Sumtiomo Rubber Industries Ltd | Detection device for decreased tire pressures and method thereof |
| CN101391564A (en) * | 2008-10-24 | 2009-03-25 | 汕头市新桥汽车电子有限公司 | Monitoring method for variation of automotive tire pressure and system for implementing monitoring method |
| CN101633297A (en) * | 2009-08-13 | 2010-01-27 | 奇瑞汽车股份有限公司 | Method for monitoring tire pressure of automobile tire |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4159541B2 (en) * | 2004-12-24 | 2008-10-01 | 住友ゴム工業株式会社 | Tire pressure drop detection method and apparatus |
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2010
- 2010-08-26 CN CN201010264549.3A patent/CN101961972B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4876528A (en) * | 1987-05-13 | 1989-10-24 | Sp Tyres Uk Limited | Method of detecting a deflated tire on a vehicle |
| US5252946A (en) * | 1990-12-06 | 1993-10-12 | Sumitomo Rubber Industries Limited | Method of detecting a deflated tire on a vehicle |
| US6439045B1 (en) * | 1997-05-23 | 2002-08-27 | Continental Teves Ag & Co., Ohg | Method for using time measurements for detecting pressure loss in vehicle tires |
| CA2439359A1 (en) * | 2001-02-26 | 2002-09-06 | Toyota Jidosha Kabushiki Kaisha | Tire information obtaining device, method for obtaining tire information and tire information obtaining program |
| EP1640189A2 (en) * | 2004-09-24 | 2006-03-29 | Sumtiomo Rubber Industries Ltd | Detection device for decreased tire pressures and method thereof |
| CN101391564A (en) * | 2008-10-24 | 2009-03-25 | 汕头市新桥汽车电子有限公司 | Monitoring method for variation of automotive tire pressure and system for implementing monitoring method |
| CN101633297A (en) * | 2009-08-13 | 2010-01-27 | 奇瑞汽车股份有限公司 | Method for monitoring tire pressure of automobile tire |
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