JPS648775B2 - - Google Patents
Info
- Publication number
- JPS648775B2 JPS648775B2 JP56029016A JP2901681A JPS648775B2 JP S648775 B2 JPS648775 B2 JP S648775B2 JP 56029016 A JP56029016 A JP 56029016A JP 2901681 A JP2901681 A JP 2901681A JP S648775 B2 JPS648775 B2 JP S648775B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- tire
- uniformity
- air
- value
- 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.)
- Expired
Links
- 238000005259 measurement Methods 0.000 claims description 18
- 238000012937 correction Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
- G01M17/022—Tyres the tyre co-operating with rotatable rolls
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tyre Moulding (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Testing Of Balance (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、タイヤユニフオミテイ機の測定誤差
補正方法及び装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a measurement error correction method and apparatus for a tire uniformity machine.
（従来の技術）
従来の経験や実験によると、タイヤ内空気圧力
の基準設定圧力からの偏差ΔPKgｆ／cm2がタイヤ
のユニフオミテイ成分（主としてRFV）に与え
る影響は大きく、例えば、標準的な乗用車用タイ
ヤでユニフオミテイ成分が10Kgのものでは、タイ
ヤ内空気圧力が基準設定圧力から0.1Kgｆ／cm2偏
差すると、ユニフオミテイ成分が約0.5Kgｆ／cm2
変化することが知られている。この変化はユニフ
オミテイ成分の大きさによつて異なり、或るサイ
ズのタイヤでは、第３図に示すようになる。(Prior art) According to conventional experience and experiments, the deviation ΔPKgf/cm 2 of tire air pressure from the reference setting pressure has a large effect on the tire uniformity component (mainly RFV). For a tire with a uniformity component of 10Kg, if the tire air pressure deviates from the standard setting pressure by 0.1Kgf/ cm2 , the uniformity component will be approximately 0.5Kgf/ cm2.
known to change. This change varies depending on the size of the uniformity component, and for a certain size tire, it becomes as shown in FIG. 3.
そこで、「神戸製鋼技報 vol.19 No.３第115〜
122頁」（1969年７月31日(株)神戸製鋼所発行）に開
示された従来のタイヤユニフオミテイ機では、第
１図に示すように、上側リム３と下側リム４との
間に挟持されて回転するタイヤ５に対して、ロー
ドセル６で両端支持されたロードホイール７を押
圧して、タイヤ５の力の変動成分、つまりユニフ
オミテイ値を測定している。この場合、タイヤ内
空気圧力の圧力制御（調整）を精密減圧弁１で行
い、圧力計８でタイヤ内空気圧力を監視し、電磁
方向切換弁９でもつてタイヤ内空気の供給、排出
を行うようにしており、空気の供給源である工場
空気（通常、圧力が５〜７Kgｆ／cm2）を減圧弁１
で所定のユニフオミテイ測定用空気圧力（通常２
Kgｆ／cm2）に減圧して使用している。 Therefore, “Kobe Steel Technical Report vol.19 No.3 No. 115~
In the conventional tire uniformity machine disclosed in "Page 122" (published by Kobe Steel, Ltd. on July 31, 1969), as shown in FIG. A load wheel 7 supported at both ends by a load cell 6 is pressed against the rotating tire 5, and the force fluctuation component of the tire 5, that is, the uniformity value, is measured. In this case, the precision pressure reducing valve 1 controls (adjusts) the air pressure inside the tire, the pressure gauge 8 monitors the air pressure inside the tire, and the electromagnetic directional control valve 9 also supplies and discharges the air inside the tire. The factory air, which is the air supply source (usually has a pressure of 5 to 7 kgf/cm 2 ), is supplied to the pressure reducing valve 1.
at the specified uniformity measurement air pressure (usually 2
It is used under reduced pressure (Kgf/cm 2 ).
（発明が解決しようとする問題点）
しかし、従来のタイヤユニフオミテイ機は、タ
イヤ内空気圧力を極めて安定に保つための精密減
圧弁１を主空気回路２中に介装しているだけであ
つたので、供給空気が清浄でかつ保守が充分に行
われている状態では、タイヤ内空気圧力の安定度
を1/1000Kgｆ／cm2のオーダに維持できるが、供給
空気の汚れ、水分、保守の程度により、この安定
度が阻害され易く、タイヤ内空気圧力の変動によ
るユニフオミテイ測定値への影響を防止すること
ができなかつた。(Problem to be solved by the invention) However, the conventional tire uniformity machine only has a precision pressure reducing valve 1 interposed in the main air circuit 2 to keep the air pressure inside the tire extremely stable. Therefore, if the supplied air is clean and well maintained, the stability of the tire air pressure can be maintained on the order of 1/1000 Kgf/ cm2 , but if the supplied air is contaminated, moisture, or maintained. This stability is likely to be impaired depending on the degree of tire pressure, and it has not been possible to prevent the uniformity measurement value from being affected by fluctuations in the tire air pressure.
即ち、減圧弁１中にある調整機構のノズル部や
弁座部に水分やゴミが付着すると、測定用空気圧
力が不安定となり、その結果、タイヤ５のユニフ
オミテイ値に誤差を生じさせることになる。また
従来では、減圧弁１の誤動作によりユニフオミテ
イ測定用空気圧力が若干変動し、基準設定圧力よ
り偏差を生じた状態になつた場合、作業員が圧力
を監視しておれば偏差を修正できるが、タイヤユ
ニフオミテイ機は、通常、生産ラインに設置され
ており、作業員が常時監視していないのが普通で
あるため、それを修正することができず、そのま
ま誤差として測定値に含まれてしまつていた。 That is, if moisture or dirt adheres to the nozzle or valve seat of the adjustment mechanism in the pressure reducing valve 1, the measured air pressure will become unstable, resulting in an error in the uniformity value of the tire 5. . Furthermore, in the past, if the air pressure for uniformity measurement fluctuated slightly due to a malfunction of the pressure reducing valve 1, resulting in a deviation from the reference setting pressure, the deviation could be corrected if the operator monitored the pressure. Tire uniformity machines are usually installed on production lines and are not constantly monitored by workers, so they cannot be corrected and are included in the measured values as errors. It was closed.
本発明は、このような従来の問題点に鑑み、タ
イヤ内空気圧力の若干の不安定さが発生しても、
測定誤差のないタイヤのユニフオミテイ値を得ら
れるようにすることを目的として提供されたもの
である。 In view of these conventional problems, the present invention has been developed to prevent the tire from becoming unstable even if the air pressure inside the tire is slightly unstable.
It was provided for the purpose of making it possible to obtain tire uniformity values without measurement errors.
（問題点を解決するための手段）
本発明は、そのための第１の手段として、回転
する一対のリム間に挟持されたタイヤに空気を導
入して張り、このタイヤにロードホイールを押圧
してタイヤのユニフオミテイ値を測定するに際
し、前記タイヤに空気を供給する主空気回路に介
在された減圧弁を、ユニフオミテイ測定のための
基準設定圧に設定された制御空気回路の圧力によ
り制御して、前記主空気回路の圧力を前記基準設
定圧と同じ圧力にして前記タイヤに供給し、前記
制御空気回路のユニフオミテイ測定のための基準
設定圧力と、前記主空気回路のタイヤ内に導入さ
れた実際の空気圧力との偏差を検出し、その偏差
値からユニフオミテイ値への誤差修正係数を求め
て、この誤差修正係数を実測したユニフオミテイ
値に積してユニフオミテイ測定誤差を補正するも
のであり、第２の手段として、ユニフオミテイ測
定用の基準設定圧力を作るための精密減圧弁を設
けると共に、その基準設定圧力と同一の圧力を制
御しかつタイヤ内に充分な空気を供給し得る大流
量の容量を持つマスター減圧弁を主空気回路に設
け、精密減圧弁の２次空気圧力とマスター減圧弁
の２次空気圧力との偏差を検出する差圧変換器
と、その偏差値からユニフオミテイ値への誤差修
正係数を求める演算器と、実測したユニフオミテ
イ値に誤差修正係数を積する掛算器とを設けたも
のである。(Means for Solving the Problems) The present invention, as a first means for this purpose, introduces air into a tire held between a pair of rotating rims to tension the tire, and presses a road wheel against the tire. When measuring the uniformity value of the tire, a pressure reducing valve interposed in the main air circuit that supplies air to the tire is controlled by the pressure of the control air circuit set to the reference setting pressure for uniformity measurement, and the The pressure in the main air circuit is set to the same pressure as the reference setting pressure and is supplied to the tire, and the reference setting pressure for uniformity measurement in the control air circuit and the actual air introduced into the tire in the main air circuit are supplied to the tire. The second means is to detect the deviation from the pressure, calculate an error correction coefficient for the uniformity value from the deviation value, and multiply the error correction coefficient by the actually measured uniformity value to correct the uniformity measurement error. In addition to installing a precision pressure reducing valve to create a reference setting pressure for uniform measurement, a master pressure reducing valve has a large flow capacity that can control the same pressure as the reference setting pressure and supply sufficient air into the tire. A valve is installed in the main air circuit, a differential pressure converter is used to detect the deviation between the secondary air pressure of the precision pressure reducing valve and the secondary air pressure of the master pressure reducing valve, and the error correction coefficient is calculated from the deviation value to the uniformity value. It is equipped with an arithmetic unit and a multiplier that multiplies the actually measured uniformity value by an error correction coefficient.
（作用）
ユニフオミテイ値の測定に際しては、タイヤ５
内に空気を導入して張り、上下一対のリム３の回
転によりタイヤ５を回転状態にした後、タイヤ５
をロードホイール７に押圧する。精密減圧弁１０
で基準設定圧力Ａを制御し、この基準設定圧力Ａ
とタイヤ５内に導入された実際の空気圧力Ｂとの
偏差を差圧変換器１２で検出し偏差値を求める。
そして、この偏差値を演算器１６に入力し、その
偏差値からユニフオミテイ値への誤差修正係数を
求める。一方、ロードセル６の信号からユニフオ
ミテイ演算器２０で実測のユニフオミテイ値を算
出した後、掛算器２１で誤差修正係数と実測した
ユニフオミテイ値とを掛算してユニフオミテイ測
定誤差を補正する。(Function) When measuring the uniformity value, tire 5
After introducing air into the tire 5 to tension it, and rotating the pair of upper and lower rims 3 to rotate the tire 5,
is pressed against the road wheel 7. Precision pressure reducing valve 10
to control the reference setting pressure A, and this reference setting pressure A
The differential pressure converter 12 detects the deviation between the actual air pressure B introduced into the tire 5 and the deviation value.
Then, this deviation value is input to the calculator 16, and an error correction coefficient for the uniformity value is determined from the deviation value. On the other hand, after a uniformity calculator 20 calculates an actually measured uniformity value from the signal of the load cell 6, a multiplier 21 multiplies the error correction coefficient by the actually measured uniformity value to correct the uniformity measurement error.
（実施例）
以下、図示の実施例について本発明を詳述する
と、第２図において、１０は制御空気回路の圧力
設定専用の精度減圧弁で、この精密減圧弁１０に
て制御されている基準設定圧力Ａによつて主空気
回路２中のマスター減圧弁１１を制御し、５〜７
Kgｆ／cm2の圧力を有する工場空気をユニフオミテ
イ測定用空気圧力（通常２Kgｆ／cm2）に減圧して
いる。マスター減圧弁１１は２次側圧力を指令圧
力と同一となるように制御する。このように構成
すれば、精密減圧弁１０は安定した制御空気圧力
を発生するのみで良く、従来のようにタイヤ５内
に空気を供給するための大容量な流量を必要とし
ないため、極めて安定した圧力を保持できる。な
お、マスター減圧弁１１はタイヤ５内への空気の
供給に必要な大流量のものであり、またその空気
の供給、排出は従来と同様に電磁方向切換弁９で
行なう。基準設定圧力は精密減圧弁１０の２次側
の空気圧力Ａであり、またタイヤ内空気圧力はマ
スター減圧弁１１の２次側の空気圧力Ｂとなる。
１２は差圧変換器であつて、精密減圧弁１０及び
マスター減圧弁１１の２次側に夫々接続されてお
り、この差圧変換器１２は基準設定圧力Ａと実際
のユニフオミテイ測定用空気圧力Ｂとの偏差を求
め、その差圧ΔPKgｆ／cm2を電気信号に変換する。
変換された電気信号は増巾器１３、ローパスフイ
ルター１４を通して増巾し安定化した後、別に設
けられた影響係数設定器１５の出力信号と共に演
算器１６に入力される。この演算器１６では、前
記差圧ΔPKgｆ／cm2と予め求めておいた影響係数
Ｋとを掛け合わせ、その値に１を加えた後、それ
の逆数を求めて、これを補正すべき誤差修正係数
（１／１＋Ｋ・ΔP）として出力する。一方、上下一
対のロードセル６からの出力信号を増巾器１７で
増巾し、加算器１８で加算し、ローパスフイルタ
ー１９を経て安定化した後、ユニフオミテイ演算
器２０に入力し、この演算器２０で従来と同様の
方法でタイヤ５の実測したユニフオミテイ値を算
出し、掛算器２１へと出力する。掛算器２１には
実測したユニフオミテイ値と誤差修正係数が共に
入力されており、この両者を掛算することによ
り、タイヤ内空気圧力の基準設定圧力からの偏差
により生じる誤差成分を補正することができるの
である。２２は圧力計である。(Example) Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In FIG. The master pressure reducing valve 11 in the main air circuit 2 is controlled by the set pressure A, and
Factory air having a pressure of Kgf/cm 2 is reduced to the air pressure for uniformity measurement (usually 2 Kgf/cm 2 ). The master pressure reducing valve 11 controls the secondary side pressure to be equal to the command pressure. With this configuration, the precision pressure reducing valve 10 only needs to generate stable control air pressure and does not require a large flow rate to supply air into the tire 5 as in the conventional case, so it can be extremely stable. can maintain the same pressure. The master pressure reducing valve 11 has a large flow rate necessary for supplying air into the tire 5, and the supply and discharge of the air is performed by the electromagnetic directional valve 9 as in the conventional case. The reference setting pressure is the air pressure A on the secondary side of the precision pressure reducing valve 10, and the tire internal air pressure is the air pressure B on the secondary side of the master pressure reducing valve 11.
Reference numeral 12 denotes a differential pressure converter, which is connected to the secondary side of the precision pressure reducing valve 10 and the master pressure reducing valve 11, respectively. Find the deviation from the pressure difference ΔPKgf/cm 2 and convert it into an electrical signal.
The converted electrical signal is amplified and stabilized through an amplifier 13 and a low-pass filter 14, and is then input to a calculator 16 together with an output signal from an influence coefficient setter 15 provided separately. This calculator 16 multiplies the differential pressure ΔPKgf/cm 2 by the influence coefficient K determined in advance, adds 1 to the value, calculates its reciprocal, and corrects the error to be corrected. Output as a coefficient (1/1+K・ΔP). On the other hand, the output signals from the pair of upper and lower load cells 6 are amplified by an amplifier 17, added by an adder 18, stabilized by a low-pass filter 19, and then input to a uniformity calculator 20. Then, the actually measured uniformity value of the tire 5 is calculated using a method similar to the conventional method, and is output to the multiplier 21. Both the actually measured uniformity value and the error correction coefficient are input to the multiplier 21, and by multiplying the two, it is possible to correct the error component caused by the deviation of the tire air pressure from the reference setting pressure. be. 22 is a pressure gauge.
次に具体的に数値を挙げて説明する。これまで
の実験結果からタイヤサイズ165SR−13のタイヤ
を空気圧力2.0Kgｆ／cm2、荷重330Kgでユニフオミ
テイを測定して半径方向の力の変動（RFV）を
求める場合、RFVが10Kg程度のタイヤでは、タ
イヤ内空気圧力を0.1Kgｆ／cm2増加すると、RFV
が約0.5Kgｆ増加すること、また空気圧力を0.1Kg
ｆ／cm2減少すると、RFVが約0.5Kgｆ減少するこ
とが判明している。この場合は、空気圧力による
RFVへの影響係数Ｋは、RFVの大きさによつて
変化し、
Ｋ＝ΔRFV／ΔP／RFV＝0.5／0.1／10＝0.5
となる。この値はタイヤの種類によつて異なる
が、同一種類ではほぼ同一の値を有している。
今、空気圧力2.0Kgｆ／cm2で測定した或るタイヤ
のRFVは、10Kgｆであるとする。同一タイヤが
生産ラインに組込まれているタイヤユニフオミテ
イ機に供給されてRFVを測定された場合、RFV
の値が10.5Kgｆと出て、この時のタイヤ内空気圧
力は2.1Kgｆ／cm2であつたとする。従来の方式で
あれば、このタイヤは正しくはRFV＝10Kgであ
つたのにも拘らず、RFV＝10.5Kgｆと判定され
てしまうことになる。処が本発明によれば、基準
設定圧力と実際の圧力との差を検出しているた
め、基準設定圧力2.0Kgｆ／cm2と実際の圧力2.1Kg
ｆ／cm2の差圧ΔP＝0.1Kgｆ／cm2が知られるので、
誤差修正係数１／１＋KΔPにＫ及びΔPを入れると、
その係数は１／１＋0.5×0.1＝0.952であり、これに
実測されたRFV＝10.5Kgを積してやると、その
結果の補正後のRFVは10.5×0.952＝10.0Kgとな
り、タイヤ内空気圧力の基準設定圧力からの偏差
がない場合の正しい値10Kgが求められた。 Next, specific numerical values will be given and explained. From the experimental results so far, when measuring the uniformity of a tire with a tire size of 165SR-13 at an air pressure of 2.0 Kgf/cm 2 and a load of 330 Kg to determine the radial force variation (RFV), if the RFV is about 10 Kg, , when the tire air pressure is increased by 0.1Kgf/ cm2 , RFV
increases by about 0.5Kgf, and the air pressure increases by 0.1Kg.
It has been found that a decrease in f/cm 2 results in a decrease in RFV of approximately 0.5 Kgf. In this case, due to air pressure
The influence coefficient K on RFV changes depending on the size of RFV, and becomes K=ΔRFV/ΔP/RFV=0.5/0.1/10=0.5. This value differs depending on the type of tire, but tires of the same type have almost the same value.
Assume now that the RFV of a certain tire measured at an air pressure of 2.0 kgf/cm 2 is 10 kgf. If the same tire is supplied to a tire uniformity machine installed in the production line and the RFV is measured, the RFV
Assume that the value of is 10.5Kgf, and the air pressure inside the tire at this time is 2.1Kgf/cm 2 . If the conventional method were used, this tire would be determined to have an RFV of 10.5 kgf, even though the correct RFV was 10 kg. However, according to the present invention, since the difference between the standard setting pressure and the actual pressure is detected, the standard setting pressure 2.0Kgf/cm 2 and the actual pressure 2.1Kg
Since the differential pressure ΔP of f/cm 2 = 0.1Kgf/cm 2 is known,
When K and ΔP are inserted into the error correction coefficient 1/1+KΔP, the coefficient is 1/1+0.5×0.1=0.952, and when this is multiplied by the actually measured RFV=10.5Kg, the resulting corrected RFV is 10.5 x 0.952 = 10.0Kg, and the correct value of 10Kg when there is no deviation of the tire air pressure from the standard setting pressure was determined.
（発明の効果）
本発明方法によれば、基準設定圧力と実際のタ
イヤ内空気圧力との偏差を求め、その偏差値から
所定の誤差修正係数を求めて、この誤差修正係数
を実測したユニフオミテイ値に積して測定誤差を
補正するので、タイヤ内空気圧力の変動に伴う測
定誤差の発生を防止でき、タイヤ内空気圧力に多
少の不安定さが発生しても誤差のない測定が可能
である。(Effects of the Invention) According to the method of the present invention, the deviation between the reference setting pressure and the actual tire air pressure is determined, a predetermined error correction coefficient is determined from the deviation value, and the uniformity value obtained by actually measuring this error correction coefficient is obtained. Since the measurement error is corrected by multiplying by .
また本発明装置では、圧力設定専用の精密減圧
弁を設け、この精密減圧弁の２次側の圧力で制御
されるマスター減圧弁を主空気回路に設けている
ので、精密減圧弁は安定した制御空気圧力を発生
するのみで良く、従来のようにタイヤ内に空気を
供給するための大容量のものを必要とせず、極め
て安定した圧力を保持できる利点がある。 In addition, in the device of the present invention, a precision pressure reducing valve dedicated to pressure setting is provided, and a master pressure reducing valve that is controlled by the pressure on the secondary side of this precision pressure reducing valve is provided in the main air circuit, so the precision pressure reducing valve provides stable control. This system only needs to generate air pressure, does not require a large capacity device to supply air into the tire, and has the advantage of being able to maintain extremely stable pressure.
第１図は従来例を示す構成図、第２図は本発明
の一実施例を示す構成図、第３図は内圧変化によ
るRFVの変化を示す図である。
２……主空気回路、３……上側リム、４……下
側リム、５……タイヤ、６……ロードセル、７…
…ロードホイール、１０……精密減圧弁、１１…
…マスター減圧弁、１２……差圧変換器、１５…
…影響係数設定器、１６……演算器、２０……ユ
ニフオミテイ演算器、２１……掛算器。
FIG. 1 is a block diagram showing a conventional example, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a diagram showing changes in RFV due to changes in internal pressure. 2... Main air circuit, 3... Upper rim, 4... Lower rim, 5... Tire, 6... Load cell, 7...
...Road wheel, 10...Precision pressure reducing valve, 11...
...Master pressure reducing valve, 12...Differential pressure converter, 15...
...Influence coefficient setter, 16...Arithmetic unit, 20...Uniformity arithmetic unit, 21...Multiplier.
Claims (1)
空気を導入して張り、このタイヤにロードホイー
ルを押圧してタイヤのユニフオミテイ値を測定す
るに際し、 前記タイヤに空気を供給する主空気回路に介在
された減圧弁を、ユニフオミテイ測定のための基
準設定圧に設定された制御空気回路の圧力により
制御して、前記主空気回路の圧力を前設定基準設
定圧と同じ圧力にして、前記タイヤに供給し、 前記制御空気回路のユニフオミテイ測定のため
の基準設定圧力と、前記主空気回路のタイヤ内に
導入された実際の空気圧力との偏差を検出し、そ
の偏差値からユニフオミテイ値への誤差修正係数
を求めて、この誤差修正係数を実測したユニフオ
ミテイ値に積してユニフオミテイ測定誤差を補正
することを特徴とするタイヤユニフオミテイ機の
測定誤差補正方法。 ２ ユニフオミテイ測定用の基準設定圧力を作る
ための精密減圧弁を設けると共に、その基準設定
圧力と同一の圧力を制御しかつタイヤ内に充分な
空気を供給し得る大流量の容量を持つマスター減
圧弁を主空気回路に設け、精密減圧弁の２次空気
圧力とマスター減圧弁の２次空気圧力との偏差を
検出する差圧変換器と、その偏差値からユニフオ
ミテイ値への誤差修正係数を求める演算器と、実
測したユニフオミテイ値に誤差修正係数を積する
掛算器とを設けたことを特徴とするタイヤユニフ
オミテイ機の測定誤差補正装置。[Scope of Claims] 1. When air is introduced into a tire held between a pair of rotating rims to inflate the tire, and a road wheel is pressed against the tire to measure the uniformity value of the tire, air is supplied to the tire. A pressure reducing valve interposed in the main air circuit is controlled by the pressure of the control air circuit set to the reference setting pressure for uniformity measurement, so that the pressure in the main air circuit is the same as the preset reference setting pressure. detects the deviation between the reference setting pressure for uniformity measurement of the control air circuit and the actual air pressure introduced into the tire of the main air circuit, and calculates the uniformity from the deviation value. 1. A measurement error correction method for a tire uniformity machine, characterized in that the error correction coefficient for a tire value is calculated, and the error correction coefficient is multiplied by an actually measured uniformity value to correct a uniformity measurement error. 2. A master pressure reducing valve is provided with a precision pressure reducing valve to create a reference setting pressure for uniformity measurement, and has a large flow capacity that can control the same pressure as the reference setting pressure and supply sufficient air into the tire. A differential pressure converter is installed in the main air circuit to detect the deviation between the secondary air pressure of the precision pressure reducing valve and the secondary air pressure of the master pressure reducing valve, and a calculation is performed to calculate the error correction coefficient from the deviation value to the uniformity value. 1. A measurement error correction device for a tire uniformity machine, comprising a multiplier for multiplying an actually measured uniformity value by an error correction coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56029016A JPS57141533A (en) | 1981-02-26 | 1981-02-26 | Method and device for compensation of measuring error of tire uniformity machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56029016A JPS57141533A (en) | 1981-02-26 | 1981-02-26 | Method and device for compensation of measuring error of tire uniformity machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57141533A JPS57141533A (en) | 1982-09-01 |
| JPS648775B2 true JPS648775B2 (en) | 1989-02-15 |
Family
ID=12264608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56029016A Granted JPS57141533A (en) | 1981-02-26 | 1981-02-26 | Method and device for compensation of measuring error of tire uniformity machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57141533A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0629056U (en) * | 1992-09-11 | 1994-04-15 | エスエムケイ株式会社 | Connector for inter-device connection |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3928921A1 (en) * | 1989-08-31 | 1991-03-07 | Hofmann Gmbh & Co Kg Maschinen | METHOD AND DEVICE FOR TESTING THE UNIFORMITY OF TIRES |
| KR20040009092A (en) * | 2002-07-22 | 2004-01-31 | 한국타이어 주식회사 | Uniformity measure methode of Tire |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5629017A (en) * | 1979-08-16 | 1981-03-23 | Fuji Thomson Kk | Thermally actuated valve for controlling automotive engine cooling water circulation circuit |
-
1981
- 1981-02-26 JP JP56029016A patent/JPS57141533A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0629056U (en) * | 1992-09-11 | 1994-04-15 | エスエムケイ株式会社 | Connector for inter-device connection |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57141533A (en) | 1982-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS648776B2 (en) | ||
| US4398877A (en) | Sheeting of biscuit dough | |
| US4047338A (en) | Method and apparatus for reducing lateral force variations and overturning moment variations in pneumatic tires | |
| US4542638A (en) | Automatic calibration of sensor circuits in gear shapers | |
| KR890001365B1 (en) | Method for controlling load distribution for a continuous rolling mill | |
| JPS648775B2 (en) | ||
| JPS58184007A (en) | Looper control device of continuous rolling mill | |
| US3938360A (en) | Shape control method and system for a rolling mill | |
| KR100610724B1 (en) | Control apparatus for controlling load distribution in continuous rolling mill | |
| CN100541380C (en) | pressure control system | |
| JP2826409B2 (en) | Dry etching equipment | |
| JPS57141532A (en) | Compensating method for measuring error of tire uniformity machine | |
| JP2882955B2 (en) | Oil column flow rate gain correction device in hydraulic pressure reduction control | |
| JPS63174110A (en) | Flow rate controller for control valve | |
| JPS63182543A (en) | Correcting method for measurement error of tire uniformity machine | |
| JPH01302820A (en) | Control device for dry etching device | |
| JPS62114715A (en) | Plate thickness control device for rolled stock | |
| JP3080507B2 (en) | Automatic thickness control method for rolling mill | |
| JPS59144511A (en) | Plate thickness control method of rolling mill | |
| JPS5868413A (en) | Rolling mill control method | |
| JPH044914A (en) | Device and method for controlling meandering of strip on cold rolling mill | |
| JPS6225445B2 (en) | ||
| JPH09253724A (en) | Thickness control device | |
| JP2005232497A (en) | Equal pressure control system for blast furnace top hopper | |
| KR19980035770A (en) | Calculation of Optimum Gain for Feed Forward Automatic Width Control in Plate Milling Process |