JP2003312219A - Tire and tire abnormality detecting device using the tire - Google Patents
Tire and tire abnormality detecting device using the tireInfo
- Publication number
- JP2003312219A JP2003312219A JP2002122887A JP2002122887A JP2003312219A JP 2003312219 A JP2003312219 A JP 2003312219A JP 2002122887 A JP2002122887 A JP 2002122887A JP 2002122887 A JP2002122887 A JP 2002122887A JP 2003312219 A JP2003312219 A JP 2003312219A
- Authority
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- Prior art keywords
- tire
- rotation
- unevenness
- load
- abnormality
- 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.)
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Links
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- Tires In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はタイヤおよび該タイ
ヤを用いるタイヤ異常検知装置に関する。さらに詳しく
は、タイヤの負荷状態を監視して、安全走行を行なうこ
とができるタイヤおよび該タイヤを用いるタイヤ異常検
知装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire and a tire abnormality detecting device using the tire. More specifically, the present invention relates to a tire capable of safely driving by monitoring the load state of the tire and a tire abnormality detection device using the tire.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】従来
より、走行中の車両のタイヤのトラブルを未然に防ぐ方
法として、タイヤの内圧低下を検知する方法や装置が提
案されている。たとえば特開昭６３−３０５０１１号公
報には、前輪タイヤと後輪タイヤの回転速度の２つの対
角和の差から内圧低下を検出する方法が記載されてい
る。また、特開２０００−１５８９２３公報には、セン
サで直接タイヤの内圧を測定し、内圧が異常であると判
断すると警報を発する装置が記載されている。2. Description of the Related Art Conventionally, methods and devices for detecting a decrease in internal pressure of a tire have been proposed as a method of preventing troubles in a tire of a running vehicle. For example, Japanese Patent Application Laid-Open No. 63-305011 describes a method of detecting a decrease in internal pressure from the difference between the two diagonal sums of the rotational speeds of a front wheel tire and a rear wheel tire. Further, Japanese Patent Application Laid-Open No. 2000-158923 describes a device that directly measures the internal pressure of a tire with a sensor and issues an alarm when it is determined that the internal pressure is abnormal.
【０００３】しかしながら、これらの方法または装置で
は、タイヤの負荷状態を検知しにくいので、タイヤの内
圧低下以外に、タイヤに緊急の異常が発生しているか、
または発生する可能性があるという情報を走行中に取得
することができない。たとえば突発的な損傷や荷重超過
などにより、タイヤがバーストする危険性がある場合、
早急にドライバーに知らせる必要がある。However, since it is difficult to detect the load state of the tire with these methods or apparatuses, whether or not there is an urgent abnormality in the tire other than the decrease in the internal pressure of the tire,
Or, it is not possible to acquire information that may occur while driving. If there is a risk of the tire bursting due to sudden damage or overloading,
It is necessary to inform the driver immediately.
【０００４】本発明は、叙上の事情に鑑み、タイヤの負
荷状態を検知しやすくして、安全走行を行なうことがで
きるタイヤおよび該タイヤを用いるタイヤ異常検知装置
を提供することを目的とする。In view of the above circumstances, it is an object of the present invention to provide a tire capable of easily detecting the load state of the tire for safe driving and a tire abnormality detecting device using the tire. .
【０００５】[0005]
【課題を解決するための手段】本発明のタイヤは、タイ
ヤの負荷状態に応じて、タイヤ１回転における回転ムラ
が次第に大きくなることを特徴とする。The tire of the present invention is characterized in that the rotation unevenness during one rotation of the tire gradually increases depending on the load state of the tire.
【０００６】また、本発明のタイヤ異常検出装置は、車
両の車輪に装着される、前記タイヤの異常を検知するタ
イヤ異常検知装置であって、前記タイヤの回転パルスを
検出する回転情報検知手段と、該タイヤの１回転におけ
る回転パルスを演算し、記憶する演算記憶手段と、該タ
イヤの１回転における回転パルス間隔の変動量を算出
し、処理する処理化手段と、該１回転ごとの処理化され
たタイヤ１回転内の回転ムラの変化に基づいて、タイヤ
の負荷状態を判定する判定手段とを備えてなることを特
徴とする。Further, the tire abnormality detecting device of the present invention is a tire abnormality detecting device mounted on a wheel of a vehicle for detecting an abnormality of the tire, and a rotation information detecting means for detecting a rotation pulse of the tire. A calculation storage means for calculating and storing a rotation pulse in one rotation of the tire, a processing means for calculating and processing a variation amount of a rotation pulse interval in one rotation of the tire, and a processing for each rotation. And a determination unit that determines the load state of the tire based on the change in the rotation unevenness within one rotation of the tire.
【０００７】[0007]
【発明の実施の形態】以下、添付図面に基づいて、本発
明のタイヤおよび該タイヤを用いるタイヤ異常検知装置
を説明する。BEST MODE FOR CARRYING OUT THE INVENTION The tire of the present invention and a tire abnormality detecting apparatus using the tire will be described below with reference to the accompanying drawings.
【０００８】図１に示すように、タイヤ異常検出装置
は、車両の車輪に装着したタイヤＦＬ、ＦＲ、ＲＬおよ
びＲＲから得られる回転情報に基づいてタイヤの異常を
検出するもので、前記タイヤＦＬ、ＦＲ、ＲＬおよびＲ
Ｒの車輪にそれぞれ関連して設けられた回転情報検知手
段である通常の車輪速センサ１を備えている。この車輪
速センサ１としては、電磁ピックアップなどが用いられ
る。また、車輪には、外周に多数の歯、たとえば４８個
の歯を有するロータが備えられている。これにより、４
つの車輪のそれぞれに備えられる車輪速センサ１が発生
する正弦波状のアナログ信号（周期的に変化する電圧信
号）をそれぞれ専用の信号線で取り出したのち、波形整
形器の２値化回路（図示せず）を通して矩形波に整形さ
れた回転速信号の回転パルスとして取り込む。車輪速セ
ンサ１は、波形整形器を経てコンピュータである制御ユ
ニット２の入出力装置としてのＩ／Ｏインターフェイス
２ａに接続されている。制御ユニット２には、異常が発
生しているまたは発生する可能性があるタイヤＦＬ、Ｆ
Ｒ、ＲＬまたはＲＲをドライバーに知らせるための液晶
表示素子、プラズマ表示素子もしくはＣＲＴまたは音声
回路などで構成された警報装置３が接続されている。As shown in FIG. 1, the tire abnormality detecting device detects an abnormality of the tire based on the rotation information obtained from the tires FL, FR, RL and RR mounted on the wheels of the vehicle. , FR, RL and R
It is provided with a normal wheel speed sensor 1 which is a rotation information detecting means provided in association with each of the R wheels. An electromagnetic pickup or the like is used as the wheel speed sensor 1. Further, the wheel is provided with a rotor having a large number of teeth on its outer circumference, for example, 48 teeth. This gives 4
After extracting the sinusoidal analog signals (voltage signals that change periodically) generated by the wheel speed sensor 1 provided for each of the two wheels through dedicated signal lines, a binarizing circuit (not shown) of the waveform shaper. No.) is taken in as a rotation pulse of a rotation speed signal shaped into a rectangular wave. The wheel speed sensor 1 is connected to an I / O interface 2a as an input / output device of a control unit 2 which is a computer via a waveform shaper. The control unit 2 includes tires FL, F that have an abnormality or may have an abnormality.
An alarm device 3 including a liquid crystal display element, a plasma display element, a CRT, a voice circuit, or the like for notifying the driver of R, RL, or RR is connected.
【０００９】前記制御ユニット２は、図２に示すよう
に、外部装置との信号の受け渡しに必要なＩ／Ｏインタ
ーフェイス２ａと、演算処理の中枢として機能するＣＰ
Ｕ２ｂと、該ＣＰＵ２ｂの制御動作プログラムが格納さ
れたＲＯＭ２ｃと、前記ＣＰＵ２ｂが制御動作を行なう
際にデータなどが一時的に書き込まれたり、その書き込
まれたデータなどが読み出されるＲＡＭ２ｄとから構成
されている。As shown in FIG. 2, the control unit 2 has an I / O interface 2a necessary for exchanging signals with an external device and a CP functioning as a center of arithmetic processing.
It comprises a U2b, a ROM 2c in which a control operation program for the CPU 2b is stored, and a RAM 2d for temporarily writing data or reading the written data when the CPU 2b performs a control operation. There is.
【００１０】前記車輪速センサ１では、タイヤの車輪の
回転情報である、ロータの歯数に相当する１回転におけ
る回転パルスが出力される。The wheel speed sensor 1 outputs a rotation pulse for one rotation corresponding to the number of teeth of the rotor, which is rotation information of the wheel of the tire.
【００１１】本実施の形態では、走行中の車両のタイヤ
の回転パルスを４輪それぞれ検出し、個々のタイヤの回
転情報として取り込み、ついで該個々のタイヤの１回転
における回転パルス間隔の変動量を検出し、タイヤ１回
転における回転ムラとして指数化したのち、走行中のタ
イヤの負荷に対する前記回転ムラを監視し、その回転ム
ラの変化に基づくタイヤの負荷状態を判定する。この負
荷状態が大きい場合には、タイヤの内圧と荷重が不適正
であると判断し、高速走行を禁止する。In the present embodiment, the rotation pulse of the tire of the running vehicle is detected for each of the four wheels, the rotation information of each tire is taken in, and the fluctuation amount of the rotation pulse interval in one rotation of each tire is calculated. After being detected and indexed as rotation unevenness in one rotation of the tire, the rotation unevenness with respect to the load of the running tire is monitored, and the tire load state is determined based on the change in the rotation unevenness. When this load condition is large, it is determined that the tire internal pressure and load are inappropriate, and high-speed traveling is prohibited.
【００１２】しかしながら、タイヤの負荷に対する回転
ムラの変化は、同じタイヤ寸法でも規格内でのばらつき
（初期差異）および剛性の違いなどにより異なるため、
感度の高いタイヤでなければ、前述の回転ムラの変化に
基づくタイヤの負荷状態の判定精度を上げることができ
ない。However, the variation of the rotation unevenness with respect to the load of the tire varies depending on the variation (the initial difference) within the standard and the difference in the rigidity even with the same tire size.
Unless the tire has high sensitivity, it is impossible to improve the accuracy of the determination of the tire load state based on the change in the rotation unevenness.
【００１３】かかる感度の高いタイヤとは、タイヤの負
荷状態に応じて、タイヤ１回転における回転ムラが次第
に大きくなるタイヤのことである。The tire having high sensitivity is a tire in which unevenness in rotation per one rotation of the tire gradually increases in accordance with the load state of the tire.
【００１４】たとえば負荷状態の増大に伴って、タイヤ
１回転内の回転ムラに特定の回転次数成分を発生させる
ように構成されたタイヤを用いるのが好ましい。For example, it is preferable to use a tire configured to generate a specific rotation order component in the rotation unevenness within one rotation of the tire as the load condition increases.
【００１５】そこで、本実施の形態では、前記車輪速セ
ンサ１と、前記タイヤの１回転における回転パルスを演
算し、記憶する演算記憶手段と、該タイヤの１回転にお
ける回転パルス間隔の変動量を算出し、処理する処理化
手段と、該１回転ごとの処理化されたタイヤ１回転内の
回転ムラに発生する特定の回転次数成分を検出する次数
成分検出手段と、当該次数成分に基づいてタイヤの負荷
状態を判定する判定手段とから構成されている。Therefore, in the present embodiment, the wheel speed sensor 1, an arithmetic storage unit for calculating and storing a rotation pulse in one rotation of the tire, and a variation amount of the rotation pulse interval in one rotation of the tire are described. Processing means for calculating and processing, order component detecting means for detecting a specific rotation order component occurring in rotation unevenness within one rotation of the processed tire for each rotation, and a tire based on the order component And a determination unit that determines the load state of the.
【００１６】前記回転パルス間隔の変動量の算出手順と
しては、１つの回転パルスの立ち上りから、つぎの回転
パルスの立ち上りまでの時間間隔ｔnを、たとえば０．
１μｓｅｃの測定精度で測定し、ついでこの測定を１回
転（４８歯）分行ない、タイヤ１回転内の回転角速度
（回転速度）の変動量を算出するようにしている。As a procedure for calculating the fluctuation amount of the rotation pulse interval, the time interval t n from the rise of one rotation pulse to the rise of the next rotation pulse is, for example, 0.
The measurement is performed with a measurement accuracy of 1 μsec, and then this measurement is performed for one rotation (48 teeth) to calculate the variation amount of the rotational angular velocity (rotational velocity) within one rotation of the tire.
【００１７】また、前記回転パルス間隔の変動量を処理
するとは、車輪の回転速信号の波形変動から、タイヤ１
回転における回転速度のムラ（回転角速度の変動）を検
出することである。たとえばタイヤ１回転における回転
ムラとして指数化する手順としては、１つ目のパルスの
時間間隔ｔ1を基準とし、２つ目以降の時間間隔（ｔ2、
……、ｔ48）を除算し、その変動量をパーセント表示す
ることで、回転ムラとして指数化するようにしている。The processing of the fluctuation amount of the rotation pulse interval means that the tire 1 is calculated from the fluctuation of the waveform of the wheel rotation speed signal.
It is to detect the unevenness of the rotation speed during rotation (the fluctuation of the rotation angular velocity). For example, as a procedure for indexing the rotation unevenness in one rotation of the tire, the time interval t 1 of the first pulse is used as a reference, and the time interval after the second pulse (t 2 ,
.., t 48 ) is divided and the amount of fluctuation is displayed as a percentage so that it is indexed as uneven rotation.
【００１８】前記１回転ごとの処理化されたデータであ
る回転ムラの情報は、正確に得るために定速走行、たと
えば車両の加速度｜Ｇ｜＜０．１とみなされる条件で蓄
積するのが好ましい。In order to accurately obtain the information on the rotation irregularity, which is the processed data for each one revolution, it is necessary to accumulate the data under the condition that the vehicle is traveling at a constant speed, for example, the acceleration | G | <0.1 of the vehicle. preferable.
【００１９】また、前記回転ムラの変化は、たとえば回
転に伴う次数解析を行ない、その次数成分を比較する波
形処理手段などを用いて行なうのが好ましい。この次数
解析とは、タイヤの１回転の周期成分を基準として、１
回転で１回変動するサイン成分を１次成分とし、１回転
で２回変動するサイン成分を２次成分とみなす解析であ
り、たとえばタイヤ（タイヤの寸法：２７５／７０Ｒ１
６）の内圧を１４０ｋＰａに設定したのち、１２０ｋｍ
／ｈで１０分間走行させたときのタイヤの１回転におけ
る回転ムラの次数成分は、１次（約９Ｈｚ）が０．１３
％、２次（約１８Ｈｚ）が０．０５％である。これに対
し、１２０ｋｍ／ｈでさらに６０分走行させたとき（バ
ースト直前（バーストの約２０秒前））の回転ムラの次
数成分は、１次が０．２１％、２次が０．１２％となり
ともに増大している。Further, it is preferable that the change of the rotation unevenness is performed by using, for example, a waveform processing means for performing an order analysis associated with the rotation and comparing the order components. This order analysis is based on the period component of one rotation of the tire as 1
This is an analysis in which a sine component that fluctuates once per rotation is regarded as a primary component, and a sine component that fluctuates twice per revolution is regarded as a secondary component. For example, a tire (tire size: 275 / 70R1
After setting the internal pressure of 6) to 140 kPa, 120 km
The order component of the rotation unevenness in one rotation of the tire when running for 10 minutes at 0.13 / h is 0.13 for the first order (about 9 Hz).
%, The secondary (about 18 Hz) is 0.05%. On the other hand, when the vehicle is run at 120 km / h for another 60 minutes (immediately before the burst (about 20 seconds before the burst)), the order component of the rotational unevenness is 0.21% for the first order and 0.12% for the second order. It is increasing with the neighbor.
【００２０】前記感度の高いタイヤとしては、たとえば
図３に示されるように、タイヤ製造時に、硬度５０〜７
０のゴムをタイヤのサイドウォール部５１に均一の高さ
ではなく、タイヤ１周で、たとえば８回のピークをもつ
山形形状の山形帯状体５２を張り付けて、タイヤ５３の
サイドウォール部５１が円周方向に周期的な剛性分布を
もつように構成することができる。As the highly sensitive tire, for example, as shown in FIG. 3, when the tire is manufactured, the hardness is 50 to 7
The rubber of No. 0 is not applied to the sidewall portion 51 of the tire at a uniform height, but a mountain-shaped strip 52 having a peak shape of, for example, 8 times is attached in one round of the tire. It can be configured to have a periodic rigidity distribution in the circumferential direction.
【００２１】この場合、図４（ａ）に示されるように、
通常の負荷状態（正常内圧２００ｋＰａ、荷重３ｋＮ）
のタイヤの１回転Ｐにおける回転ムラは、内圧低下（１
００ｋＰａ）であるときおよび内圧低下（１００ｋＰ
ａ）であり高荷重（５ｋＮ）であるときには、図４
（ｂ）、図４（ｃ）に示されるように変化する。この回
転ムラは、通常の負荷状態のときには、図５（ａ）に示
されるように、８次の回転次数成分が発生していないの
に対し、内圧低下（１００ｋＰａ）であるときおよび内
圧低下（１００ｋＰａ）であり高荷重（５ｋＮ）である
ときには、図５（ｂ）、図５（ｃ）に示されるように、
８次数成分が発生するとともに、その成分の振幅レベル
が次第に大きくなっている。なお、縦軸の単位は％であ
る。In this case, as shown in FIG.
Normal load condition (normal internal pressure 200 kPa, load 3 kN)
The unevenness in rotation of the tire in one revolution P is caused by the decrease in the internal pressure (1
00 kPa) and decrease in internal pressure (100 kP
a) and a high load (5 kN),
(B), it changes as shown in FIG.4 (c). As shown in FIG. 5 (a), this rotation unevenness does not generate the eighth-order rotation order component in the normal load state, but the internal pressure decrease (100 kPa) and the internal pressure decrease ( When the load is 100 kPa) and the load is high (5 kN), as shown in FIGS. 5 (b) and 5 (c),
As the 8th order component is generated, the amplitude level of the component gradually increases. The unit of the vertical axis is%.
【００２２】また、感度の高いタイヤとしては、図６に
示されるように、タイヤ６１の通常状態のタイヤトレッ
ド部６２の接地端部よりも外側の部分に、ブロック剛性
が１周で、たとえば６回ピークをもつ山形形状の山形パ
ターン部６３を形成し、タイヤトレッド部の接地端部に
円周方向に周期的な剛性分布をもつように構成すること
もできる。Further, as a highly sensitive tire, as shown in FIG. 6, a block rigidity is one round, for example, 6 at a portion outside the ground contact end of the tire tread portion 62 of the tire 61 in a normal state. It is also possible to form the chevron-shaped chevron pattern portion 63 having a circular peak and to have a cyclic rigidity distribution in the circumferential direction at the ground contact end of the tire tread portion.
【００２３】特定の次数成分を検出することにより、タ
イヤの負荷状態の大小を知ることができるため、予めタ
イヤの内圧と荷重の変化による回転ムラのレベルを記憶
しておけば、負荷率（＝実荷重／荷重負担能力）が１０
０％をこえて何％であるかがわかる。By detecting a specific order component, it is possible to know the magnitude of the tire load condition. Therefore, if the level of rotational unevenness due to changes in tire internal pressure and load is stored in advance, the load factor (= Actual load / load bearing capacity) is 10
You can see what percentage is above 0%.
【００２４】前記特定の次数成分は、何次でもよいが、
あまり高次では、検出感度が下がる。また、低次の方が
好ましいが、あまり低次になると、車両の乗り心地の悪
化を招くおそれがある。このため、４〜１０次であるの
が好ましい。The specific order component may be any order,
If it is too high, the detection sensitivity will decrease. Further, the low order is preferable, but if the order is too low, the riding comfort of the vehicle may be deteriorated. Therefore, it is preferably 4th to 10th order.
【００２５】なお、タイヤは、各サイズごとに、使用内
圧によって荷重負担能力が設定されている。たとえば日
本自動車タイヤ協会（ＪＡＴＭＡ）のイヤーブック（２
００１年度版）に、空気圧−負荷能力対応表が掲載され
ており、これにより推奨内圧とそのときの負荷能力がわ
かる。The load bearing capacity of each tire is set according to the internal pressure used. For example, the Japan Automotive Tire Association (JATMA) Yearbook (2
In the fiscal year 2001), there is a pneumatic pressure-load capacity correspondence table, which shows the recommended internal pressure and the load capacity at that time.
【００２６】本発明におけるタイヤの負荷状態とは、任
意のタイヤ内圧における負荷能力を前記対応表から算出
し、そのタイヤの使用内圧における実荷重が負荷能力に
対して、どの程度の割合であるかを意味するものとす
る。したがって、タイヤの負荷状態が大きい（高負荷状
態）とは、その内圧における負荷能力に対して、実荷重
が１００％以上の状態である。そして、実荷重の数字が
大きいほど、負荷荷重が大きいことを意味している。The load state of the tire in the present invention means the load capacity at an arbitrary tire internal pressure calculated from the above correspondence table, and the ratio of the actual load at the tire internal pressure to the load capacity. Shall mean. Therefore, a large tire load condition (high load condition) is a condition in which the actual load is 100% or more of the load capacity at the internal pressure. The larger the actual load number, the larger the applied load.
【００２７】つぎに本発明にかかわるタイヤ異常検出方
法を図７に基づいて説明する。まず車輪の車輪速信号を
検出したのち、車両のタイヤの回転パルスをＣＰＵに取
り込む（ステップＳ１）。ついで定速走行の状態である
か否かを判断して、車両の加速度が｜Ｇ｜＜０．１とみ
なされる場合には、タイヤ１回転における回転パルス間
隔の変動量を検出する（ステップＳ２、Ｓ３）。ついで
該変動値をタイヤ１回転における回転ムラとして指数化
処理する（ステップＳ４）。そして、得られた回転ムラ
が予め設定した範囲内の回転ムラかどうかの判定を行な
う（ステップ５）。ついで得られた回転ムラの範囲、た
とえば１回転分（４８個）の回転次数解析を行ない、１
次から１０次成分までの実効値を算出する。そのうちの
基準値である、予め適正な内圧および適正な荷重にて走
行したときの８次数成分がしきい値０．３％をこえてい
るか否かが比較される（ステップＳ６）。このしきい値
はタイヤごとに予め設定される。そして、しきい値をこ
えている場合、タイヤの内圧と荷重が不適正であると判
断されて、警報装置がＯＮの状態になりドライバーに高
速走行の禁止のための警報が発せられる（ステップＳ
７）。Next, a tire abnormality detecting method according to the present invention will be described with reference to FIG. First, after detecting a wheel speed signal of a wheel, a rotation pulse of a vehicle tire is fetched into the CPU (step S1). Then, it is determined whether or not the vehicle is traveling at a constant speed, and if the acceleration of the vehicle is regarded as | G | <0.1, the variation amount of the rotation pulse interval in one rotation of the tire is detected (step S2). , S3). Then, the fluctuation value is indexed as rotation unevenness in one rotation of the tire (step S4). Then, it is determined whether the obtained rotation unevenness is rotation unevenness within a preset range (step 5). Then, the rotation order analysis of the range of rotation unevenness obtained, for example, one rotation (48) is performed.
The effective value from the next to the tenth component is calculated. It is compared whether or not the 8th order component, which is a reference value among them, when traveling with an appropriate internal pressure and an appropriate load in advance exceeds a threshold value of 0.3% (step S6). This threshold value is preset for each tire. If the value exceeds the threshold value, it is determined that the internal pressure and load of the tire are improper, the alarm device is turned on, and an alarm is issued to the driver to prohibit high speed running (step S).
7).
【００２８】[0028]
【発明の効果】以上説明したとおり、本発明によれば、
タイヤの負荷状態が大きい場合、タイヤの内圧と荷重が
不適正であると判断し、高速走行を禁止するため、安全
走行を行なうことができる。As described above, according to the present invention,
When the tire is heavily loaded, it is determined that the internal pressure and load of the tire are improper, and high-speed traveling is prohibited. Therefore, safe traveling can be performed.
【図１】本発明のタイヤ異常検出装置の一実施の形態を
示すブロック図である。FIG. 1 is a block diagram showing an embodiment of a tire abnormality detecting device of the present invention.
【図２】図１におけるタイヤ異常検出装置の電気的構成
を示すブロック図である。FIG. 2 is a block diagram showing an electrical configuration of the tire abnormality detection device in FIG.
【図３】感度の高いタイヤの一例を示す側面図である。FIG. 3 is a side view showing an example of a highly sensitive tire.
【図４】通常の負荷状態、内圧低下および内圧低下であ
り高荷重であるときの回転ムラを示す説明図である。FIG. 4 is an explanatory diagram showing a normal load state, a decrease in internal pressure, and rotation unevenness when the internal pressure is decreased and a high load is applied.
【図５】通常の負荷状態、内圧低下および内圧低下であ
り高荷重であるときの回転ムラを次数成分で示した説明
図である。FIG. 5 is an explanatory diagram showing an order component of a normal load state, a decrease in internal pressure, and a rotation unevenness when the internal pressure is decreased and a high load is applied.
【図６】感度の高いタイヤの他の例を示す部分切欠き正
面図である。FIG. 6 is a partially cutaway front view showing another example of a highly sensitive tire.
【図７】本発明のフローチャートの一例である。FIG. 7 is an example of a flowchart of the present invention.
１ 車輪速センサ ２ 制御ユニット ３ 表示器 ５１ サイドウォール部 ５２ 山形帯状体 ５３、６１ タイヤ ６２ タイヤトレッド部 ６３ 山形パターン部 1 Wheel speed sensor 2 control unit 3 display 51 Sidewall part 52 Yamagata strip 53,61 tires 62 tire tread 63 Yamagata pattern section
Claims (7)
転における回転ムラが次第に大きくなるタイヤ。1. A tire in which unevenness in rotation during one rotation of the tire gradually increases depending on a load state of the tire.
分を発生させるよう構成されてなる請求項１記載のタイ
ヤ。2. The tire according to claim 1, wherein the tire is configured to generate a specific rotation order component in rotation unevenness within one rotation.
に周期的な剛性分布をもつように構成されている請求項
２記載のタイヤ。3. The tire according to claim 2, wherein the sidewall portion of the tire is configured to have a periodic rigidity distribution in the circumferential direction.
部が円周方向に周期的な剛性分布をもつように構成され
ている請求項２記載のタイヤ。4. The tire according to claim 2, wherein the ground contact end portion of the tire tread portion of the tire is configured to have a cyclic rigidity distribution in the circumferential direction.
１、２、３または４記載のタイヤの異常を検知するタイ
ヤ異常検知装置であって、前記タイヤの回転パルスを検
出する回転情報検知手段と、該タイヤの１回転における
回転パルスを演算し、記憶する演算記憶手段と、該タイ
ヤの１回転における回転パルス間隔の変動量を算出し、
処理する処理化手段と、該１回転ごとの処理化されたタ
イヤ１回転内の回転ムラの変化に基づいて、タイヤの負
荷状態を判定する判定手段とを備えてなるタイヤ異常検
知装置。5. A tire abnormality detection device mounted on a wheel of a vehicle for detecting an abnormality of a tire according to claim 1, 2, 3 or 4, wherein the rotation information detection detects a rotation pulse of the tire. Means for calculating and storing a rotation pulse for one rotation of the tire, and storing the variation amount of the rotation pulse interval for one rotation of the tire,
A tire abnormality detecting device comprising: a processing means for processing; and a judging means for judging a load state of a tire based on a change in rotation unevenness within one rotation of the tire processed for each one rotation.
る特定の回転次数成分を検出する次数成分検出手段を備
える請求項５記載のタイヤ異常検知装置。6. The tire abnormality detecting device according to claim 5, further comprising order component detecting means for detecting a specific rotation order component generated in the rotation unevenness within one rotation of the tire.
発する警報装置を備える請求項５または６記載のタイヤ
異常検知装置。7. The tire abnormality detecting device according to claim 5, further comprising an alarm device for issuing an alarm when the tire load is large.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002122887A JP4309615B2 (en) | 2002-04-24 | 2002-04-24 | Tire and tire abnormality detection apparatus using the tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002122887A JP4309615B2 (en) | 2002-04-24 | 2002-04-24 | Tire and tire abnormality detection apparatus using the tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003312219A true JP2003312219A (en) | 2003-11-06 |
| JP4309615B2 JP4309615B2 (en) | 2009-08-05 |
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ID=29538375
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002122887A Expired - Fee Related JP4309615B2 (en) | 2002-04-24 | 2002-04-24 | Tire and tire abnormality detection apparatus using the tire |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006151375A (en) * | 2004-11-02 | 2006-06-15 | Bridgestone Corp | Abnormality judging device |
| JP2006151366A (en) * | 2004-11-02 | 2006-06-15 | Bridgestone Corp | Abnormality determining device and abnormality determining method |
| JP2015536463A (en) * | 2012-11-20 | 2015-12-21 | 黎明 傅 | Method for improving passenger car tire pressure monitoring system |
| JP2016145759A (en) * | 2015-02-09 | 2016-08-12 | Ntn株式会社 | Wheel speed rotation fluctuation pattern extraction device |
-
2002
- 2002-04-24 JP JP2002122887A patent/JP4309615B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006151375A (en) * | 2004-11-02 | 2006-06-15 | Bridgestone Corp | Abnormality judging device |
| JP2006151366A (en) * | 2004-11-02 | 2006-06-15 | Bridgestone Corp | Abnormality determining device and abnormality determining method |
| JP4732848B2 (en) * | 2004-11-02 | 2011-07-27 | 株式会社ブリヂストン | Abnormality determination apparatus and abnormality determination method |
| JP2015536463A (en) * | 2012-11-20 | 2015-12-21 | 黎明 傅 | Method for improving passenger car tire pressure monitoring system |
| JP2016145759A (en) * | 2015-02-09 | 2016-08-12 | Ntn株式会社 | Wheel speed rotation fluctuation pattern extraction device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4309615B2 (en) | 2009-08-05 |
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