CN105480030B - Judge the abnormal method of vehicle load - Google Patents

Abstract

A kind of method for judging that vehicle load is abnormal, receive a tire pressure detection unit first in multiple pressure of tire produced by multiple detection times, and calculate the variable quantity of those pressure of tire and be converted to a slope data, hereafter judge the slope data whether be on the occasion of, if the pressure of tire finally obtained and the tire parameter, which calculate, using a tyre deflection calculation formula on the occasion of i.e. obtains a squeegee action amount, and the pressure of tire finally obtained and the tire parameter calculate obtaining a tire load-carrying data using a load-carrying calculation formula, an abnormal tyre condition is recycled to compare the tire load-carrying data and the squeegee action amount, if the tire load-carrying data and the squeegee action amount, which meet the abnormal tyre condition, determines that the vehicle load is abnormal.Thereby, with the more preferably accurate testing result of offer.

Description

Judge the abnormal method of vehicle load

Technical field

The present invention relates to a kind of detection method applied on vehicle, more particularly to a kind of side for judging that vehicle load is abnormal Method.

Background technology

As the common people come back for the consciousness of traffic safety, many depots are initially configured the checking device of monitoring traffic safety In on a vehicle, such as the tyre pressure monitoring of the vehicle display of record vehicular motion, or sensing vehicle tyre pressure Control system (Tire pressure monitoring system, abbreviation TPMS).Wherein, for vehicle load abnormality detection, So-called vehicle load be extremely when the vehicle carries a load, the tire on the vehicle bear the load of the vehicle and When being deformed, the inner tube of a tyre space of the tire is set to diminish, the pressure of tire raises to support the load of the vehicle.

And vehicle load abnormality detection now mainly uses general Haier (Hell) formula to be estimated calculating, with Obtain a tire load-carrying data of the tire.But because tire construction is generally complicated, although general Haier's formula gives the wheel Tire load-carrying data, but general Haier's formula is during the tire load-carrying data are estimated, it is unactual in view of the tire Deflection, and easily produce the situation that the tire load-carrying data and reality be not inconsistent and occur.

The content of the invention

The main object of the present invention, is that solving existing detection mode does not consider tire actual change and easily have error The problem of generation.

For up to above-mentioned purpose, the present invention provides a kind of method for judging that vehicle load is abnormal, applied on a vehicle, the car There are multiple tires, each tire includes at least one tire parameter for representing the tire characteristics, and each tire is equipped with One tire pressure detection unit, each tire pressure detection unit normality detection assembles in the wherein tire of the tire state and every one Detection time exports a pressure of tire, and this method has comprising step：

Step one, the wherein one tire pressure detection unit is received in those pressure of tire produced by multiple detection times, and Each pressure of tire is calculated in the variable quantity in each detection time, a slope data is converted into；

Whether step 2, it is on the occasion of if on the occasion of entering next step, if negative value is then held again to judge the slope data Row step one；

Step 3, is carried out using a tyre deflection calculation formula to the pressure of tire finally obtained and the tire parameter Calculating obtains a squeegee action amount, and using a load-carrying calculation formula to the pressure of tire and the tire parameter for finally obtaining Progress, which is calculated, obtains a tire load-carrying data；And

Step 4, compares the tire load-carrying data and the squeegee action amount using an abnormal tyre condition, if the tire is carried Tuple evidence and the squeegee action amount meet the abnormal tyre condition and determine that the vehicle load is abnormal.

In an embodiment, the tyre deflection calculation formula is：

Wherein, R, V₀、P₀And b is respectively wherein the one of the tire tire parameter, R is a tire radius, V₀For a wheel Tire zero load initial volume, P₀For the unloaded crude tyre tire pressure of a tire, b is a deflected width of tyre, and f is then the squeegee action Amount.

In an embodiment, the load-carrying calculation formula is：

Wherein, P, b and R are respectively wherein the one of the tire tire parameter, and P is a pressure of tire, and b is disconnected for a tire Face width, R is a tire radius, and f is the squeegee action amount, and W is the tire load-carrying data.

In an embodiment, the abnormal tyre condition is a tire sinking critical value to compare the squeegee action amount, And a loading of tire critical value to compare the tire load-carrying data.

In an embodiment, the step 2 further includes a startup and judges the abnormal sub-step of vehicle load：It is oblique using one Rate exception benchmark is compared with the slope data, if the numerical value of the slope data is more than or equal to slope exception benchmark Into step 3, step 2 is re-executed if the numerical value of the slope data is less than the abnormal benchmark of the slope.

In an embodiment, the step 2 further includes the sub-step of a judgement inclination of vehicle：Obtain wherein one tire The slope data and another tire the slope data, and compare those slope datas of two tires, if those are oblique Rate data are judged as that vehicle is normal to be identical, if those slope datas are judged as inclination of vehicle to be different.

In an embodiment, the sub-step of an acquirement tire reset condition is included before the step one execution：Keep The vehicle is a no-load condition, the unloaded initial body of a tire for obtaining each tire using a tire volume calculation formula Product.Further, the tire volume calculation formula is：

V₀=π R²b

Wherein, R is a tire radius, and b is a deflected width of tyre, and the V₀For the unloaded initial volume of a tire.

In an embodiment, the sub-step of an offer tire parameter is included before the step one execution.

By the above method of the present invention, had the characteristics that compared to existing：

1. the present invention judges that vehicle load is abnormal with the squeegee action amount and the tire load-carrying data, can more meet reality should The tire condition of vehicle, and accurate judged result can be provided, it is to avoid the unexpected generation caused by erroneous judgement.

Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.

Brief description of the drawings

Fig. 1, the vehicle of one embodiment of the invention implements schematic diagram；

Fig. 2, the tire parameter schematic diagram of one embodiment of the invention；

Fig. 3, the implementation process diagram of one embodiment of the invention；

Fig. 4, the implementation process diagram of another embodiment of the present invention；

Fig. 5-1, the pressure of tire schematic diagram of one embodiment of the invention；

Fig. 5-2, the not inclined pressure of tire schematic diagram of vehicle of one embodiment of the invention；

Fig. 5-3, the pressure of tire signal of the inclination of vehicle of one embodiment of the invention.

Embodiment

The structural principle and operation principle of the present invention are described in detail below in conjunction with the accompanying drawings：

Refer to Fig. 1 and Fig. 2, the abnormal method of vehicle load of the present invention, applied to a vehicle 1, the vehicle 1 has multiple Tire 11, each tire 11 represents the tire parameter of the feature of tire 11 comprising at least one, and the Fig. 2 that please arrange in pairs or groups, and the present invention should Specification data before use after tire parameter can be made for the tire 11, a such as tire radius R, tire ground connection patch length a, The unloaded initial volume V of one deflected width of tyre b, a tire₀Deng.Furthermore, each tire 11 of the present invention is more equipped with a tire pressure State in detection unit 111, the tire for wherein one tire 11 that each normality of tire pressure detection unit 111 detection is assembled, and Each tire pressure detection unit 111 has a pressure of tire P, each tire pressure inspection every a detection time T (this is not shown) output Unit 111 is surveyed in an embodiment, can be sensing kenel either tire external sensed kenel in tire.Also, the present invention is in an embodiment In, the vehicle 1, which can be set, an electronic installation 12 being connected with each information of tire pressure detection unit 111, and the inventive method It can then be loaded on by way of programmed logic language in the electronic installation 12.

And please arrange in pairs or groups refering to Fig. 3, from the above, the abnormal method of vehicle load of the present invention includes following steps：

Step one S1, receives the wherein one tire pressure detection unit 111 in those tires produced by multiple detection time T P is pressed, and calculates each pressure of tire P in the variable quantity in each detection time T, a slope data M1 is converted into；

Whether step 2 S2, it is on the occasion of if on the occasion of entering next step, if negative value is then weighed to judge slope data M1 It is new to perform step 2；

Step 3 S3, using a tyre deflection calculation formula to the pressure of tire P and the tire parameter that finally obtain Progress, which is calculated, obtains a squeegee action amount f, and using a load-carrying calculation formula to the pressure of tire P and the wheel that finally obtain Tire parameter calculate obtaining a tire load-carrying data；

Step 4 S4, compares the tire load-carrying data and squeegee action amount f, if the tire using an abnormal tyre condition Load-carrying data and squeegee action amount f meet the abnormal tyre condition and determine that the load-carrying of vehicle 1 is abnormal.

Illustrate, in the present invention implement it is initial, be linked and packed first with the information of electronic installation 12 in the vehicle 1 On the wherein one tire pressure detection unit 111, and continuously obtain the tire pressure detection unit 111 in continuous multiple detection time T Produced multiple pressure of tire P, then calculate acquired those pressure of tire P in the change in above-mentioned those detection times T Amount, is converted into a slope data M1 (such as Fig. 5-1), and enter step 2 S2.In step 2 S2, using the electronic installation 12 Whether judge slope data M1 is on the occasion of if on the occasion of the state and the entrance that represent that the vehicle 1 is aggravated in load continuous Step 3 S3, if negative value then represents that the vehicle 1 is in the state that load continuous mitigates.In step 3 S3, first with the wheel Tire deflection calculation formula calculate obtaining a squeegee action amount f to the pressure of tire P finally obtained and the tire parameter. The alleged tyre deflection calculation formula is mainly used in calculating the overall deformation amount after the tire 11 load, the tyre deflection meter Calculate formula as follows：

Wherein, R, V₀、P₀And b is respectively wherein the one of the tire 11 tire parameter, R is the tire radius, V₀For this Tire zero load initial volume, P₀For the unloaded crude tyre tire pressure of a tire, b is the deflected width of tyre, and f is then the squeegee action Amount.In obtaining after squeegee action amount f, calculating is carried out with the load-carrying calculation formula immediately and obtains the tire load-carrying data, and be somebody's turn to do Load-carrying calculation formula is as follows：

Wherein, P, b and R are respectively wherein the one of the tire 11 tire parameter, and P is the tire finally obtained Pressure, b is a deflected width of tyre, and R is a tire radius, and f is the squeegee action amount, and W is the tire load-carrying data.Hold, this Invention obtains the squeegee action amount f and the tire respectively using the tyre deflection calculation formula and the load-carrying calculation formula After load-carrying data, the squeegee action amount f and the tire load-carrying number are compared with the abnormal tyre condition into step 4 S4 immediately According to if the tire load-carrying data and squeegee action amount f meet the abnormal tyre condition and determine that the load-carrying of vehicle 1 is abnormal.Enter One step illustrates, the abnormal tyre condition can be tiremaker during designing tyre, allow the tire 11 in using Change in journey, such as the tire pressure change after the cubic deformation amount or the tyre load of the tire 11.Illustrate, Yu Yishi Apply in example, the abnormal tyre condition includes the tire sinking critical value one to compare squeegee action amount f, and one to than Compared with the loading of tire critical value of the tire load-carrying data.

Hold, and please arrange in pairs or groups Fig. 4 and Fig. 5-1, in an embodiment, step 2 S2 has further included a startup and has judged car The abnormal sub-step S21 of load-carrying：It is compared using slope exception benchmark R1 and slope data M1, if the slope data When M1 numerical value is more than or equal to slope exception benchmark R1, i.e., into step 3 S3, if slope data M1 numerical value is small Step 2 S2 is then re-executed in the abnormal benchmark of the slope.It is more particularly described, in implementation process, the vehicle 1 is steadily loaded During heavy burden, produced slope data M1 all steadily rises each tire 11 after testing.And uprushed load in the vehicle 1 When, the slope data M1 that each tire 11 detection is produced produces acute variation and is more than or equal to the abnormal benchmark of the slope R1, the possibility now of the invention that can judge that vehicle load is abnormal initial stage, into step 3 S3.

Furthermore, and Fig. 5-3 that please arrange in pairs or groups, the present invention is in an embodiment, and step 2 S2 can more include a judgement vehicle Inclined sub-step S22：Obtain the slope data M1 of wherein one tire 11 and another slope data of another tire 13 M2, and compare those slope datas M1, M2 of two tires 11,13, if those slope datas M1, M2 are judged as vehicle to be identical Normally, if those slope datas M1, M2 to be judged as inclination of vehicle if different.It is more particularly described, when the vehicle 1, increase is negative suddenly When being loaded in the wherein side of the vehicle 1, to should be set by side the tire 13 bear the load pressure larger compared with the tire 11 Power, and pressure in the tire of the tire 13 can be made significantly raised, this for making that slope data M2 can be more than that the tire 11 calculate is oblique Rate data M1, makes two slope data M1, M2 inconsistent, and then can be assumed that the vehicle 1 has the inclination facts.

Also, multiple referring to Fig. 4, the present invention is in an embodiment, can more include one before the step one S1 execution takes Obtain the sub-step S11 of tire reset condition：It is a no-load condition to keep the vehicle 1, is taken using a tire volume calculation formula Obtain the unloaded initial volume V of the tire of each tire 11₀.The present embodiment sub-step is mainly used for what the vehicle 1 more renewed The tire 11, and be directed to the tire inner volume after each tire 11 is inflated and being under no-load condition again and measured, make The present invention makees to judge more meet the specific implementation state of the tire 11 in the future.Furthermore, the tire volume calculation formula is：

V₀=π R²b

Wherein, R is the tire radius, and b is the deflected width of tyre, and the V₀For the unloaded initial volume of the tire.Hold It is described, by the tyre kind that market is sold now is many, be can more accurate measurement, the present invention in an embodiment, in this Step one S1 can more include the sub-step S10 of an offer tire parameter before performing.

In summary, the present invention judges the abnormal method of vehicle load, receives a tire pressure detection unit first in multiple inspections Multiple pressure of tire produced by the survey time, and calculate the variable quantity of those pressure of tire and be converted to a slope data, hereafter sentence Break the slope data whether be on the occasion of, if on the occasion of i.e. using a tyre deflection calculation formula to the tire that finally obtains Pressure and the tire parameter carry out calculating the squeegee action amount that obtains, and using a load-carrying calculation formula to the wheel that finally obtains Tire tire pressure and the tire parameter calculate obtaining a tire load-carrying data, and the abnormal tyre condition of recycling compares tire load Tuple evidence and the squeegee action amount, if the tire load-carrying data and the squeegee action amount meet the abnormal tyre condition and determine to be somebody's turn to do Vehicle load is abnormal.Thereby, actual tire state is not considered and easily there is the facts for judging misalignment to solve existing judgment mode Occur.

Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence Various corresponding changes and deformation, but these corresponding changes and change ought can be made according to the present invention by knowing those skilled in the art Shape should all belong to the protection domain of appended claims of the invention.

Claims (9)

1. a kind of method for judging that vehicle load is abnormal, applied on a vehicle, the vehicle has multiple tires, each tire Comprising at least one tire parameter for representing the tire characteristics, each tire is equipped with a tire pressure detection unit, each tire pressure The detection of detection unit normality assembles in the wherein tire of the tire state and every a detection time one pressure of tire of output, its It is characterised by, this method has comprising step：

Step one, receive the wherein one tire pressure detection unit in those pressure of tire produced by multiple detection times, and calculate Each pressure of tire is converted into a slope data in the variable quantity in each detection time；

Whether step 2, it is on the occasion of if on the occasion of entering next step, if negative value then re-executes step to judge the slope data Rapid one；

Step 3, is calculated the pressure of tire and the tire parameter for finally obtaining using a squeegee action amount calculation formula A squeegee action amount is obtained, and the pressure of tire finally obtained and the tire parameter are carried out using a load-carrying calculation formula Calculating obtains a tire load-carrying data；And

Step 4, compares the tire load-carrying data and the squeegee action amount using an abnormal tyre condition, if the tire load-carrying number According to and the squeegee action amount meet the abnormal tyre condition and determine that the vehicle load is abnormal.

2. the abnormal method of vehicle load is judged as claimed in claim 1, it is characterised in that the squeegee action amount calculation formula For：

$P=\frac{P_0{V}_0}{V_0-\[\frac{2{\sin }^{-1}\left(\frac{\sqrt{2Rf-f2}}{R}\right){\mathrm{\πR}}^2}{360}-\frac{\left(2\sqrt{2Rf-f^2}\right)(R-f)}{2}\]b}$

Wherein, P is a pressure of tire, R, V₀、P₀And b is respectively wherein the one of the tire tire parameter, R is a tire half Footpath, V₀For the unloaded initial volume of a tire, P₀For the unloaded crude tyre tire pressure of a tire, b is a deflected width of tyre, and f is then should Squeegee action amount.

3. judge the method for vehicle load exception as claimed in claim 1 or 2, it is characterised in that the load-carrying calculation formula is：

W=2Pb √ 2Rf-f²

Wherein, P, b and R are respectively wherein the one of the tire tire parameter, and P is a pressure of tire, and b is a tyre section width Degree, R is a tire radius, and f is the squeegee action amount, and W is the tire load-carrying data.

4. the abnormal method of vehicle load is judged as claimed in claim 1, it is characterised in that the abnormal tyre condition is used to for one Compare the squeegee action critical value of the squeegee action amount, and one critical to compare the loading of tire of the tire load-carrying data Value.

5. the abnormal method of vehicle load is judged as claimed in claim 1, it is characterised in that the step 2 has further included a startup Judge the abnormal sub-step of vehicle load：It is compared using the abnormal benchmark of a slope with the slope data, if the slope data Numerical value enter step 3 when being more than or equal to the abnormal benchmark of the slope, if to be less than the slope abnormal for the numerical value of the slope data Benchmark then re-executes step 2.

6. the abnormal method of vehicle load is judged as claimed in claim 1, it is characterised in that the step 2 has further included a judgement The sub-step of inclination of vehicle：The slope data of the wherein tire and the slope data of another tire are obtained, and is compared Compared with those slope datas of two tires, if those slope datas are judged as that vehicle is normal to be identical, if those slope datas are It is different to be judged as inclination of vehicle.

7. the abnormal method of vehicle load is judged as claimed in claim 1, it is characterised in that included before the step one execution There is the sub-step of an acquirement tire reset condition：It is a no-load condition to keep the vehicle, utilizes a tire volume calculation formula Obtain the unloaded initial volume of a tire of each tire.

8. judge the method for vehicle load exception as claimed in claim 7, it is characterised in that the tire volume calculation formula is：

V₀=π R²b

Wherein, R is a tire radius, and b is a deflected width of tyre, and the V₀For the unloaded initial volume of a tire.

9. the abnormal method of vehicle load is judged as claimed in claim 1, it is characterised in that included before the step one execution The sub-step of an offer tire parameter is provided.