CN100487410C - Method for rating tyre dynamic balance unbalance - Google Patents

Method for rating tyre dynamic balance unbalance Download PDF

Info

Publication number
CN100487410C
CN100487410C CNB200410023843XA CN200410023843A CN100487410C CN 100487410 C CN100487410 C CN 100487410C CN B200410023843X A CNB200410023843X A CN B200410023843XA CN 200410023843 A CN200410023843 A CN 200410023843A CN 100487410 C CN100487410 C CN 100487410C
Authority
CN
China
Prior art keywords
tire
unbalance
rectifying plane
balance
mass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CNB200410023843XA
Other languages
Chinese (zh)
Other versions
CN1673710A (en
Inventor
杭柏林
王金健
孟鹏
东野广俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mesnac Co Ltd
Original Assignee
QINGDAO COLLEGES AND UNIVERSITIES SOFT CONTROL Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by QINGDAO COLLEGES AND UNIVERSITIES SOFT CONTROL Co Ltd filed Critical QINGDAO COLLEGES AND UNIVERSITIES SOFT CONTROL Co Ltd
Priority to CNB200410023843XA priority Critical patent/CN100487410C/en
Publication of CN1673710A publication Critical patent/CN1673710A/en
Application granted granted Critical
Publication of CN100487410C publication Critical patent/CN100487410C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The present invention is the calibration method of unbalance amount of tyre. One linear corresponding relation between the unbalance mass of the tyre under measurement and the measured unbalance couple in the calibration plane is established, so as to obtain the calibration function corresponding to the unbalance amount.

Description

The scaling method of tire dynamic and balance amount of unbalance
Technical field
The present invention relates to the scaling method of tire dynamic and balance amount of unbalance, by demarcating the linear relationship between unbalance mass, and force cell measured value, realize utilizing testing tool to measure, judge the method for tire speed grade specifically.
Background technology
The quantity that present domestic unit and family buy automobile increases substantially, and has proposed requirements at the higher level for the quality standard in doughnut serviceable life.
Automobile tyre is the rotatable body of a kind of circular ring type of tubular section, and it is to be processed through applying, moulding, sulfuration typing by rubber preformed material, compounded rubber preformed material that multilayer has an all-steel cord.The tire of described structure, its constituent material exist skewness inevitably or mass centre does not overlap problems such as (so-called mass eccentricities) with the geometric center of tire, just the unbalance amount of tire of often saying.According to relevant mechanics principle, there is the to a certain degree tire of mass eccentricity, under the high speed rotating situation, must produce the radial force of alternation, thereby can cause the vibration or the noise of automobile, also can have influence on speed, comfort level or the smoothness of automobilism.If the amount of unbalance of tire is excessive, serious also can the damage car parts, even can cause traffic hazard.
For the detection of unbalance amount of tire, be a necessary and crucial flow process in the existing tire production.As application number is 02106779, the patent that is used for measuring wheel tyre uniformity and/or dynamically balanced equipment and method, its equipment comprises that one is rotatably supported in one by the main shaft in the main shaft housing of non-yielding prop, described tire is fixedly mounted on the described main shaft, when measurement was carried out, described main shaft was rotated; And at least one is installed in the piezoelectric force transducer on the described main shaft housing, and when described main shaft rotated, described at least one piezoelectric force transducer detected the power that tyre rotation produces.
Pick-up unit and the method disclosed as above-mentioned patent, do not disclose and illustrate for the unbalance mass, of different kinds of tyre distribute and the sensor measured value between linear relationship, just its versatility is relatively poor, need in other words to calculate correct operation with the sensor measured value at every turn, otherwise will cause the error that detects data bigger with regard to distributing at the amount of unbalance of different kinds of tyre.Lose the meaning of detection.
Summary of the invention
The scaling method of tire dynamic and balance amount of unbalance of the present invention, its purpose is intended to address the above problem and is not enough and the corresponding linear relationship of setting up between a kind of detected tyre unbalance mass, and the rectifying plane unbalance mass, that records is provided, and promptly draws the calibration coefficient between above-mentioned corresponding amount.
Scaling method as described in the present invention, in case employed dynamic balancer is in place, the calibration coefficient of himself is consistent, just no matter detect the tire of which kind of type or have the tire of which kind of rank amount of unbalance, all can be by the calibration coefficient of described scaling method, in conjunction with the rectifying plane unbalance mass, of surveying, reflect the amount of unbalance and the phase place on the upper and lower plane of tire with the form of numerical value, thereby draw the tire unbanlence quality of quantification.
Scaling method of the present invention, it is used for dynamic balance test machine.The measured static-unbalance of dynamic balance test machine, unbalanced couple amount, the amount of unbalance and the phase place on two planes up and down can calibrate the unbalance mass, of tire by following equation.
Scaling method of the present invention, for identical dynamic balance test machine, its calibration coefficient is set at k1, k2, k3, k4, and its calibration system is to determine constantly, and no matter how the unbalance mass, (being set at m) of detected tyre changes.
So, can calculate above-mentioned calibration coefficient k1, k2, k3, k4 by selecting arbitrary detected tyre.Particularly:
Corresponding linear relationship between the first step, the centrifugal force of deriving upper and lower rectifying plane and force cell measured value.That is,
According to principle of moment balance, upper and lower rectifying plane asks the result of square to should be 0, thereby can set up detected tyre at centrifugal force F that last rectifying plane produced s, respectively with the N of upper and lower force transducer measured value s, N xBetween the linear relationship expression formula; And the centrifugal force Fx that detected tyre is produced at following rectifying plane is respectively with the N of upper and lower force transducer measured value s, N xBetween the linear relationship expression formula.
Second step is by the centrifugal force F of the upper and lower rectifying plane generation of detected tyre S, F XCalculate tire eccentric mass m.
In the 3rd step,, establish the unbalance mass, m of the upper and lower rectifying plane of detected tyre by the eccentric m of tire quality s, m xAnd force transducer survey the linear relationship between the out-of-balance force N, (comprise N S, N X) between corresponding relation, i.e. calibration coefficient k1, k2, k3, k4.
As mentioned above, by calibration coefficient k1, k2, k3, k4, can determine detected tyre unbalance mass, m and force transducer survey the linear relationship between the out-of-balance force N.
Determine the numerical value of calibration coefficient k1, k2, k3, k4, can utilize the linear relationship between above-mentioned m and the N, by repeatedly last rectifying plane, down rectifying plane install additional certain mass, install the identical counterweight of angle additional, calculate with the actual out-of-balance force N that records of certain rotating speed.
Calibration coefficient k1, k2, k3, k4 numerical value are in case determine, can test and judge at the tire of same specification, the tire unbanlence quality that is drawn is the numerical value that quantizes, thereby has direct directive function for the disequilibrium regulating of tire, the reason that produces amount of unbalance for tire is analyzed, improve tire quality, theoretical foundation is provided.And above-mentioned calibration coefficient k1, k2, k3, k4 can realize effectively shortening the tire Measuring Time and reduce testing time once determining, thereby have correspondingly improved tire checking efficient, reduce production costs.
Description of drawings
Fig. 1 is the primary structure synoptic diagram of dynamic balancer.
As shown in Figure 1, use the dynamic balancer of the scaling method of tire dynamic and balance amount of unbalance of the present invention, mainly include down wheel rim 1, last wheel rim 2, counterweight 3, last rectifying plane 4, tire 5, following rectifying plane 6, last wheel rim clamping body 7, last force transducer 8, main shaft supporting 9, following force transducer 10, rotary encoder 11.Wherein,
N sBe to go up the force transducer measured value,
N xForce transducer measured value under being,
A is two distances between the force transducer,
B is the distance that upper sensor arrives down the wheel rim lower surface,
C is the tread width (operating distance between just upper and lower wheel rim) of tire,
R is the radius of upper and lower rectifying plane (wheel rim).
Embodiment:
Embodiment 1, in conjunction with dynamic balancer structure shown in Figure 1, the scaling method of tire dynamic and balance amount of unbalance of the present invention, behind definite and the dynamic balancer that is in place, select arbitrary detected tyre with eccentric mass m, at first set up calibration coefficient k and detected tyre unbalance mass, m and survey the linear mathematic(al) representation between the out-of-balance force N, its linear model derivation is:
The first step as shown in Figure 1, according to principle of moment balance, is asked square respectively to upper and lower rectifying plane, and calculates the centrifugal force that the upper and lower rectifying plane of detected tyre produces.
Promptly last rectifying plane is asked square, its result should be 0, i.e. ∑ Ms=0.Solve:
F x = B + C C N s - A + B + C C N x - - - ( 1 )
Wherein, F xBe the centrifugal force that detected tyre decomposes down rectifying plane.
Again following rectifying plane is asked square, its result should be 0, i.e. ∑ Mx=0.Solve:
F s = A + B C N x - B C N s - - - ( 2 )
Wherein, F sBe the centrifugal force that detected tyre decomposes rectifying plane.
Second step decomposed the centrifugal force of upper and lower rectifying plane by detected tyre, had:
F=F s+F x (3)
Wherein, F is that eccentric mass m is the centrifugal force that r wheel rim place produces at radius.
Produce principle according to centrifugal force, can calculate the eccentric m of tire quality;
m=F/rω 2 (4)
R is the radius of upper and lower correction,
ω is the angular velocity of tire rotation, is rotated counterclockwise moment for just, and right-handed moment is for bearing;
In the 3rd step,, establish the quality m that the detected tyre equivalence decomposes rectifying plane by tire eccentric mass m s, m xWith sensor survey out-of-balance force N s, N xBetween linear relationship, i.e. calibration coefficient k;
With above-mentioned equation (1), (2), (3), (4) formula simultaneous, set up the expression formula of following linear relationship
m s = k 1 N s + k 2 N x m x = k 3 N s + k 4 N x - - - ( 5 )
Wherein:
m sBe the unbalance mass, that detected tyre decomposes rectifying plane,
m xBe the unbalance mass, that detected tyre decomposes down rectifying plane,
K1, k2, k3, k4 are described scale transformation coefficient, i.e. calibration coefficient.
By aforesaid linear model derivation, calibration coefficient k1, k2, k3, k4 are to determine constantly for specific concrete dynamic balancer, and no matter how the unbalance mass, m of detected tyre changes.
Thereby, only need calculate calibration coefficient k1, k2, k3, k4, promptly the form of available numerical value gives expression to the unbalance mass, m of the upper and lower rectifying plane of detected tyre s, m x
Below be the idiographic flow of measuring and calculating calibration coefficient k1, k2, k3, k4:
The first step, the test value that detected tyre only is installed.
Detected tyre is installed between the upper and lower wheel rim, and selects a certain rotating speed to be rotated between 200-1000rpm, record the whole amount of unbalance of tire and axis system, the actual measurement of the corresponding upper and lower sensor of promptly whole amount of unbalance is N S0, N X0After recording above-mentioned measured value, promptly stop the rotation.
In second step, below colonel, add the test value behind the certain mass counterweight.
Add the counterweight that quality is ml (being generally 50-200g) at last rectifying plane, the rotating speed of still going up step then is rotated, and records the tire and the whole amount of unbalance of axis system, i.e. the measured value N of corresponding upper and lower sensor that install additional behind the counterweight Ss, N Xs
After recording above-mentioned measured value, promptly stop the rotation.
According to aforesaid equation (5), can draw
k 1 ( N ss - N s 0 ) + k 2 ( N xs - N x 0 ) = m 1 k 3 ( N ss - N s 0 ) + k 4 ( N xs - N x 0 ) = 0 - - - ( 6 )
4 unknown quantity k1, k2, k3, k4 are arranged in the above-mentioned expression formula, still can not calculate occurrence, thereby also need get one group of numerical value again.
The 3rd step, the test value after below following school, adding the certain mass counterweight.
Taking off quality from last rectifying plane is that the counterweight of ml is added in down on the same angle of rectifying plane, and the employing rotating speed rotation identical with the last step, records the tire and the whole amount of unbalance of axis system, i.e. the measured value N of corresponding upper and lower sensor that install additional behind the counterweight Sx, N XxAfter recording above-mentioned measured value, promptly stop the rotation.
Based on same principle,, can draw according to equation (5)
k 1 ( N sx - N s 0 ) + k 2 ( N xx - N x 0 ) = 0 k 3 ( N sx - N s 0 ) + k 4 ( N xx - N x 0 ) = m 1 - - - ( 7 )
In fact, N S0, N X0, N Ss, N Xs, N Sx, N Xx, ml is given value, thereby can be with system of equations (6), (7) simultaneous,
If N Ss-N S0=T1, N Xs-N X0=T2, N Sx-N S0=T3, N Xx-N X0=T4, thus can solve:
k 1 = m lT 4 / ( T 1 T 4 - T 2 T 3 ) k 2 = m lT 3 / ( T 2 T 3 - T 1 T 4 ) k 3 = m lT 2 / ( T 2 T 3 - T 1 T 4 )
k 4=mlT 1/(T 1T 4-T 2T 3)
Calibration coefficient k1, k2, k3, the k4 that tried to achieve this moment are actual measuring and calculating values.
Use above-mentioned dynamic balancer, all can pass through equation (5) for the detected tyre of same specification, and according to calibration coefficient k1, k2, k3, k4, and upper and lower force transducer measured value N s, N x, finally determine the unbalance mass, m of the upper and lower rectifying plane of detected tyre s, m x, can calculate unbalance amount of tire m.

Claims (5)

1, a kind of scaling method of tire dynamic and balance amount of unbalance, it is applied on the dynamic balance test machine, it is characterized in that: the calibration coefficient of setting based on dynamic balance test machine is k1, k2, k3, k4, and calibration coefficient is definite constant for the tire of same size;
Described scaling method, for a certain dynamic balance test machine, behind the tire that is installed, the actual out-of-balance force N that records of sensor after counterweight is installed to rectifying plane comprises the upper and lower force transducer measured value N of described dynamic balancer s, N x, and the centrifugal force F of detected tyre unbalance mass, m generation, by the equivalent centrifugal force F that decomposes the upper and lower rectifying plane of tire s, F x, determine the concrete numerical value of calibration coefficient k1, k2, k3, k4, described scaling method comprises following two flow processs, promptly determine centrifugal force F that detected tyre unbalance mass, m produces and sensor survey the linear relationship between the out-of-balance force N; And, use the linear relationship between above-mentioned F and the N, install the identical counterweight of certain mass and fixed angle respectively additional and the actual out-of-balance force N that records calculates the concrete numerical value of calibration coefficient k1, k2, k3, k4 with the rotation of identical rotating speed by upper and lower rectifying plane at described dynamic balancer.
2, the scaling method of tire dynamic and balance amount of unbalance according to claim 1 is characterized in that: the centrifugal force F that described definite detected tyre unbalance mass, m produces and survey between the out-of-balance force N flow process of linear relationship be:
The first step according to principle of moment balance, is asked square respectively to upper and lower rectifying plane, and calculates the centrifugal force that detected tyre decomposes upper and lower rectifying plane;
Promptly last rectifying plane is asked square, its result should be 0, and promptly ∑ Ms=0 solves
F x = B + C C N s - A + B + C C N x - - - ( 1 )
Wherein, F xBe the centrifugal force that detected tyre decomposes down rectifying plane,
A is two distances between the force transducer,
B is the distance that upper sensor arrives down the wheel rim lower surface,
C is the tread width of tire, the operating distance between just upper and lower wheel rim;
Again following rectifying plane is asked square, its result should be 0, i.e. ∑ Mx=0; Solve:
F s = A + B C N x - B C N s - - - ( 2 )
Wherein, F sBe the centrifugal force that detected tyre decomposes rectifying plane;
Second step decomposed the centrifugal force of upper and lower rectifying plane by detected tyre, had:
F=F s+F x (3)
Wherein, F is that eccentric mass m is the centrifugal force that r wheel rim place produces at radius;
Produce principle according to centrifugal force, can calculate the eccentric m of tire quality;
m=F/rω 2 (4)
R is the radius of upper and lower correction,
ω is the angular velocity of tire rotation, is rotated counterclockwise moment for just, and right-handed moment is for bearing;
In the 3rd step,, establish the quality m that the detected tyre equivalence decomposes rectifying plane by tire eccentric mass m s, m xWith sensor survey out-of-balance force N s, N xBetween linear relationship, i.e. calibration coefficient k;
With above-mentioned equation (1), (2), (3), (4) formula simultaneous, set up the expression formula of following linear relationship
m s = k 1 N s + k 2 N x m x = k 3 N s + k 4 N x - - - ( 5 )
Wherein:
m sBe that the unbalance mass, of going up rectifying plane is decomposed in the detected tyre equivalence,
m xBe that the detected tyre equivalence divides the unbalance mass, of taking off rectifying plane,
K1, k2, k3, k4 are described scale transformation coefficient, i.e. calibration coefficient.
3, the scaling method of tire dynamic and balance amount of unbalance according to claim 2 is characterized in that: the flow process of calculating calibration coefficient k1, k2, k3, k4 particularly is:
The first step, the test value that detected tyre only is installed;
Detected tyre is installed between the upper and lower wheel rim, and selects a certain rotating speed to be rotated between 200-1000rpm, record the whole amount of unbalance of tire and axis system, the actual measurement of the corresponding upper and lower sensor of promptly whole amount of unbalance is N S0, N X0After recording above-mentioned measured value, promptly stop the rotation;
In second step, below colonel, add the test value behind the certain mass counterweight;
Adding quality at last rectifying plane is ml, is the counterweight of 50-200g, and the rotating speed of still going up step then is rotated, and records the tire and the whole amount of unbalance of axis system, i.e. the measured value N of corresponding upper and lower sensor that install additional behind the counterweight Ss, N Xs
After recording above-mentioned measured value, promptly stop the rotation;
According to aforesaid equation (5), draw
k 1 ( N ss - N s 0 ) + k 2 ( N xs - N x 0 ) = m 1 k 3 ( N ss - N s 0 ) + k 4 ( N xs - N x 0 ) = 0 - - - ( 6 )
The 3rd step, the test value after below following school, adding the certain mass counterweight;
Taking off quality from last rectifying plane is that the counterweight of ml is added in down on the same angle of rectifying plane, and the employing rotating speed rotation identical with the last step, records the tire and the whole amount of unbalance of axis system, i.e. the measured value N of corresponding upper and lower sensor that install additional behind the counterweight Sx, N Xx, record above-mentioned measured value after, promptly stop the rotation;
Based on same principle,, draw according to equation (5)
k 1 ( N sx - N s 0 ) + k 2 ( N xx - N x 0 ) = 0 k 3 ( N sx - N s 0 ) + k 4 ( N xx - N x 0 ) = m 1 - - - ( 7 )
In fact, N S0, N X0, N Ss, N Xs, N Sx, N Xx, ml is given value, thereby can be with system of equations (6), (7) simultaneous,
If N Ss-N S0=T1, N Xs-N X0=T2, N Sx-N S0=T3, N Xx-N X0=T4, thus can solve:
k 1 = m 1 T 4 / ( T 1 T 4 - T 2 T 3 ) k 2 = m 1 T 3 / ( T 2 T 3 - T 1 T 4 ) k 1 = m 1 T 2 / ( T 2 T 3 - T 1 T 4 ) k 4 = m 1 T 1 / ( T 1 T 4 - T 2 T 3 ) .
4, the scaling method of tire dynamic and balance amount of unbalance according to claim 3, it is characterized in that: in the described actual process that records calibration coefficient k1, k2, k3, k4, it is identical numerical value that the amount of the upper and lower rectifying plane of described dynamic balancer is demarcated radius r; And same counterweight is installed on the upper and lower rectifying plane by identical angle respectively.
CNB200410023843XA 2004-03-25 2004-03-25 Method for rating tyre dynamic balance unbalance Active CN100487410C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB200410023843XA CN100487410C (en) 2004-03-25 2004-03-25 Method for rating tyre dynamic balance unbalance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB200410023843XA CN100487410C (en) 2004-03-25 2004-03-25 Method for rating tyre dynamic balance unbalance

Publications (2)

Publication Number Publication Date
CN1673710A CN1673710A (en) 2005-09-28
CN100487410C true CN100487410C (en) 2009-05-13

Family

ID=35046386

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB200410023843XA Active CN100487410C (en) 2004-03-25 2004-03-25 Method for rating tyre dynamic balance unbalance

Country Status (1)

Country Link
CN (1) CN100487410C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101144756B (en) * 2006-09-11 2010-04-14 青岛高校软控股份有限公司 Calibration method for tyre uniformity test
KR20110050983A (en) * 2009-11-09 2011-05-17 한국타이어 주식회사 Rim for tire uniformity inspection
CN103900763B (en) * 2012-12-28 2017-03-08 软控股份有限公司 Tire multistage wheel rim amount of unbalance scaling method
SI2837923T1 (en) * 2013-08-15 2018-11-30 Seichter Gmbh Balancing machine
CN108982011A (en) * 2018-09-07 2018-12-11 青岛科技大学 Tire unbanlence quality test device and its amplitude measurement method

Non-Patent Citations (8)

* Cited by examiner, † Cited by third party
Title
中华人民共和国国家标准 汽车轮胎动平衡试验方法 GB/T 18505-2001. 中华人民共和国国家质量监督检验检疫总局,1-4,中国标准出版社. 2002
中华人民共和国国家标准 汽车轮胎动平衡试验方法 GB/T 18505-2001. 中华人民共和国国家质量监督检验检疫总局,1-4,中国标准出版社. 2002 *
动不平衡及车轮动平衡机不平衡量的测量. 刘美生,王蛟茹,姜爱军.中国测试技术,第3期. 2003
动不平衡及车轮动平衡机不平衡量的测量. 刘美生,王蛟茹,姜爱军.中国测试技术,第3期. 2003 *
用影响系数法改革动平衡实验. 胡贵钱.实验室研究与探索,第6期. 2000
用影响系数法改革动平衡实验. 胡贵钱.实验室研究与探索,第6期. 2000 *
车轮动平衡机的测量原理及其计量校准. 鲍国华.上海计量测试,第28卷第5期. 2001
车轮动平衡机的测量原理及其计量校准. 鲍国华.上海计量测试,第28卷第5期. 2001 *

Also Published As

Publication number Publication date
CN1673710A (en) 2005-09-28

Similar Documents

Publication Publication Date Title
CN100462704C (en) Method for measuring type dynamic balance unbalance amount
US9569563B2 (en) Method for prediction and control of harmonic components of tire uniformity parameters
CN100485348C (en) Forecast method for change of tyre radial force
JP4025560B2 (en) Prediction of tire uniformity using balance and low speed uniformity data
CN103900763B (en) Tire multistage wheel rim amount of unbalance scaling method
US4366707A (en) Apparatus for optimizing tire or wheel characteristics
KR970001971B1 (en) Method and apparatus for determining the position and magnitude of unbalance correction
US7574913B2 (en) Vehicle wheel balancer system
CN100582710C (en) Method for calibrating and measuring unbalance amount of tire
CN102072797B (en) Method for measuring unbalance of spindle in measurement of dynamic balance of tire and tire balancing machine
CN101532900B (en) Vertical type wheel hub dynamic balancing machine
CN100487410C (en) Method for rating tyre dynamic balance unbalance
EP0133229B1 (en) Wheel balancer two plane calibration method
US8037773B2 (en) Method of considering the dynamic behavior of a movable member of a machine for performing a wheel fatigue test
JPH06281527A (en) Method and equipment for balancing rotating body
CN100462708C (en) Method for measuring unbalance amount of mainshaft system
CN110006590A (en) The method for obtaining the amount of unbalance of rotor and the amount of unbalance of balancing machine
CN101144756B (en) Calibration method for tyre uniformity test
CN102654384B (en) Dynamic radius positioning direct measurement method of rotary-platform-type precision centrifugal machine
JP5631264B2 (en) Tire balance test method and tire balance tester
CN102156025A (en) System calibration method of tire balancing machine
CN109115408B (en) Dynamic balance test method of large hydroelectric generating set based on centrifugal force equation
KR100784277B1 (en) Measuring method for dynamic rolling radius and effective radius variation of tire during tire rolling under a load
US11060941B2 (en) Method for determining an unbalance of a shaft-elastic rotor with reference to the outward deflection
CN109642845A (en) Wheel balance measurement device, the evaluation method of wheel balance measurement device, the bearing calibration of wheel balance measurement device, wheel balance measurement device correction program

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model
CP01 Change in the name or title of a patent holder

Address after: 266045 No. 1, Zhengzhou Road, Qingdao, Shandong

Patentee after: Mesnac Co., Ltd.

Address before: 266045 No. 1, Zhengzhou Road, Qingdao, Shandong

Patentee before: Qingdao Colleges and Universities Soft Control Co., Ltd.

C56 Change in the name or address of the patentee

Owner name: MESNAC CO., LTD.

Free format text: FORMER NAME: QINGDAO COLLEGES AND UNIVERSITIES SOFT CONTROL CO., LTD.