JPH09193627A - Tire deformation detecting device and vehicular operation supporting device using tire deformation detecting device - Google Patents
Tire deformation detecting device and vehicular operation supporting device using tire deformation detecting deviceInfo
- Publication number
- JPH09193627A JPH09193627A JP8024750A JP2475096A JPH09193627A JP H09193627 A JPH09193627 A JP H09193627A JP 8024750 A JP8024750 A JP 8024750A JP 2475096 A JP2475096 A JP 2475096A JP H09193627 A JPH09193627 A JP H09193627A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- mark
- deformation
- detecting means
- detecting
- 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.)
- Granted
Links
Landscapes
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Tires In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、車両の走行制御時
などに基礎データとして利用するタイヤの変形の具合を
検出するタイヤの変形検出装置及びこのタイヤの変形検
出装置を利用した車両用運転支援装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire deformation detecting device for detecting the degree of tire deformation which is used as basic data when controlling the running of a vehicle, and a vehicle driving assistance using this tire deformation detecting device. It relates to the device.
【０００２】[0002]
【従来の技術】車両用運転支援装置の一つとして、車両
の現在の走行状態に基づき予測走行軌跡を算定し、これ
を前方の実際の道路と重ね合わせてヘッドアップ表示す
るものが知られている。この装置では、予測走行軌跡の
算定に際し、車両の走行速度、加減速度、操舵角、ヨー
レイトなどの走行状態を示す各種の物理量に加えて、路
面とタイヤとの間の摩擦係数である路面摩擦係数が必要
になる。従来、この路面摩擦係数は、路面の凹凸や、雨
天時の路面の濡れ具合などを光学式センサを用いて検出
し、この検出結果に基づいて推定値を設定することなど
によって行っている（特開昭63ー83424 号公報など) 。
このような路面摩擦係数の推定は、アンチロック・ブレ
ーキシステムなどでも必要であり、路面の凹凸の他、左
右の車輪の回転数の差、横加速度などを検出することに
より行われている。2. Description of the Related Art As one of vehicle driving support devices, there is known a device which calculates a predicted traveling locus based on the current traveling state of a vehicle and displays it in a head-up manner by superimposing it on an actual road ahead. There is. In this device, when calculating the predicted travel locus, in addition to various physical quantities that indicate the running state of the vehicle, such as running speed, acceleration / deceleration, steering angle, and yaw rate, the road surface friction coefficient, which is the friction coefficient between the road surface and the tires, is calculated. Will be required. Conventionally, the road surface friction coefficient has been determined by detecting unevenness of the road surface, the degree of wetness of the road surface in rainy weather, etc. using an optical sensor, and setting an estimated value based on the detection result. (Kaisho 63-83424, etc.).
Such estimation of the road surface friction coefficient is necessary even in an anti-lock braking system, etc., and is performed by detecting not only the unevenness of the road surface but also the difference in the rotational speed of the left and right wheels, the lateral acceleration, and the like.
【０００３】[0003]
【発明が解決しようとする課題】上述した路面の状況を
検出しこの検出結果に基づき路面摩擦係数を推定する方
法では、タイヤの磨耗の具合が考慮されないため、高い
推定精度を実現することが困難であるという問題があ
る。また、左右の車輪の回転数の差や横加速度などから
路面摩擦係数を推定する方法は、間接的なため高い推定
精度を実現することが困難であるという問題がある。従
って、本発明の一つの目的は、高精度の路面摩擦係数の
推定が可能な新規な装置を提供することにある。In the method of detecting the condition of the road surface and estimating the road surface friction coefficient based on the detection result, it is difficult to realize high estimation accuracy because the degree of tire wear is not taken into consideration. There is a problem that is. Further, the method of estimating the road surface friction coefficient from the difference between the rotational speeds of the left and right wheels and the lateral acceleration has a problem that it is difficult to realize high estimation accuracy because it is indirect. Therefore, one object of the present invention is to provide a novel apparatus capable of highly accurately estimating the road surface friction coefficient.
【０００４】[0004]
【課題を解決するための手段】本発明に係わるタイヤの
変形検出装置は、タイヤの所定の箇所に形成されたマー
クと、このタイヤの他の所定の箇所から前記マークの位
置を検出するマーク位置検出手段と、前記マーク位置検
出手段が検出したマークの位置から前記タイヤの変形を
検出するタイヤ変形検出手段とを備えている。SUMMARY OF THE INVENTION A tire deformation detecting device according to the present invention comprises a mark formed at a predetermined position of a tire and a mark position for detecting the position of the mark from another predetermined position of the tire. The detection means and the tire deformation detection means for detecting the deformation of the tire from the position of the mark detected by the mark position detection means.
【０００５】[0005]
【発明の実施の態様】本発明の実施の態様によれば、マ
ークがタイヤのクラウン部の内周面上に形成されると共
に、位置検出手段がリム上のマークと対向する箇所に形
成される。この位置検出手段は、マークのタイヤの円周
及び幅方向への位置の変化を検出する二次元位置検出手
段であり、これは、照明手段を備えた光学的位置検出手
段から構成される。この光学的位置検出手段は、マーク
の結像位置に応じた大きさの電気信号を発生する二次元
ＰＳＤ素子から構成される。更に、車両本体とマーク位
置検出手段との間には動作電力を伝達するための非接触
式の電力伝達手段が形成されると共に、このマーク位置
検出手段とタイヤ変形検出手段との間には、マーク位置
の検出結果を電気信号として伝達する無線伝送路が形成
される。According to an embodiment of the present invention, the mark is formed on the inner peripheral surface of the crown portion of the tire, and the position detecting means is formed on the rim at a position facing the mark. . The position detecting means is a two-dimensional position detecting means for detecting changes in the position of the mark in the circumferential direction and the width direction of the tire, and is composed of an optical position detecting means provided with an illuminating means. The optical position detecting means is composed of a two-dimensional PSD element that generates an electric signal having a magnitude corresponding to the image forming position of the mark. Further, a non-contact power transmission means for transmitting operating power is formed between the vehicle body and the mark position detection means, and between the mark position detection means and the tire deformation detection means, A wireless transmission path for transmitting the detection result of the mark position as an electric signal is formed.
【０００６】[0006]
【実施例】図１は、本発明の一実施例のタイヤの変形検
出装置の主要部を検出対象のタイヤと共に示す断面図で
ある。タイヤＴの路面と接するクラウン部Ｃの内部のカ
ーカスＫの面上に小径の円形のマーク１が形成されてい
る。このマーク１は、例えば、光線に対して良好な反射
率を有する金属の薄片などをカーカスＫの面上に接着剤
で貼着することなどによって形成される。FIG. 1 is a cross-sectional view showing a main part of a tire deformation detecting apparatus according to an embodiment of the present invention together with a tire to be detected. A circular mark 1 having a small diameter is formed on the surface of the carcass K inside the crown portion C that is in contact with the road surface of the tire T. The mark 1 is formed, for example, by sticking a thin piece of metal or the like having a good reflectance with respect to light rays on the surface of the carcass K with an adhesive.
【０００７】マーク１に対向するリムＲの所定の箇所に
は、マーク位置検出器２が設置されている。このマーク
位置検出器２は、樹脂を素材とする円筒形のケースに内
蔵されており、このケースがリムＲに設けられた開口内
に圧入されたのち接着剤が塗布されることにより、リム
Ｒ上に保持されている。マーク位置検出器２には、これ
が検出したマーク位置をＦＭ信号によって車体側に設置
されたタイヤ変形検出回路に送信するためのアンテナ３
が設けられている。A mark position detector 2 is installed at a predetermined position of the rim R facing the mark 1. The mark position detector 2 is built in a cylindrical case made of resin, and the case is press-fitted into an opening provided in the rim R and then an adhesive is applied to the rim R. Is held on. The mark position detector 2 has an antenna 3 for transmitting the mark position detected by the mark position detector 2 to a tire deformation detection circuit installed on the vehicle body side by an FM signal.
Is provided.
【０００８】タイヤＴは、リムＲの中心部においてボル
ト・ナットを介して車両の回転軸に固定される。この回
転軸の端部には、樹脂を素材とする円板状の基板４が固
定されており、この基板上の表裏それぞれの面には電磁
結合用のコイル５と６とが形成されている。コイル５と
６とは基板を通る電線を介して電気的に接続されてい
る。基板４上に形成されたコイル５と対向する車両本体
側の箇所にはコイル７が形成されると共に、基板４上に
形成されたコイル６と対向するリムＲ側の箇所にはコイ
ル８が形成されている。The tire T is fixed to the rotary shaft of the vehicle at the center of the rim R via bolts and nuts. A disk-shaped substrate 4 made of resin is fixed to the end of the rotary shaft, and electromagnetic coupling coils 5 and 6 are formed on the front and back surfaces of the substrate, respectively. . The coils 5 and 6 are electrically connected via an electric wire passing through the substrate. A coil 7 is formed at a portion on the vehicle body side facing the coil 5 formed on the substrate 4, and a coil 8 is formed at a portion on the rim R side facing the coil 6 formed on the substrate 4. Has been done.
【０００９】車体側に設置された図示しない電源回路か
ら供給される交流電力が、互いに対向して設置されてい
るコイル７→コイル５→コイル６→コイル８を通してマ
ーク位置検出器２に供給され、その内部に設置されてい
る整流・平滑回路によって直流電力に変換され、マーク
位置検出器２の内部の各回路に直流電源電力として供給
される。AC power supplied from a power supply circuit (not shown) installed on the vehicle body side is supplied to the mark position detector 2 through the coils 7 → coil 5 → coil 6 → coil 8 which are installed to face each other. It is converted into DC power by a rectification / smoothing circuit installed inside and is supplied to each circuit inside the mark position detector 2 as DC power supply.
【００１０】マーク位置検出器２のマーク１に対向する
先端部には、透明な窓の内部に、図２の断面図に例示す
るような構成の光学ヘッドが形成されている。この光学
ヘッドにおいては、樹脂製の基板ＳＢ上に固定された発
光ダイオード（ＰＤ）と、二次元位置検出素子（ＰＳ
Ｄ）とが近接して設置されると共に、それぞれの前方に
は送光レンズＴＬと受光レンズＲＤとが設置されてい
る。発光ダイオードＰＤから出射された光は送光レンズ
ＴＬを通して、スポット径を拡大しながらタイヤの内部
に照射され、マーク１を照射する。マーク１で反射され
た光線は、タイヤの中心部に向けて進み、マーク位置検
出器２の受光レンズＲＬによる収束を受けながら二次元
ＰＳＤの表面に入射する。At the tip of the mark position detector 2 facing the mark 1, an optical head having a structure as illustrated in the sectional view of FIG. 2 is formed inside a transparent window. In this optical head, a light emitting diode (PD) fixed on a resin substrate SB and a two-dimensional position detecting element (PS
D) are installed close to each other, and a light transmitting lens TL and a light receiving lens RD are installed in front of each of them. The light emitted from the light emitting diode PD is irradiated through the light transmitting lens TL to the inside of the tire while enlarging the spot diameter to irradiate the mark 1. The light beam reflected by the mark 1 travels toward the center of the tire and enters the surface of the two-dimensional PSD while being converged by the light receiving lens RL of the mark position detector 2.
【００１１】この二次元ＰＳＤは、図３の斜視図に示す
ように、矩形状のｐ型の半導体層とｎ型の半導体層との
界面にｐｎ接合が形成されると共に、表面側のｐ型層で
は、一方の方向（ｘ軸方向とする）に沿う周辺部分につ
いては互いに対向する電極対（１３ａ，１３ｂ）が形成
され、これと直交する他方の方向（ｙ軸方向とする）に
沿う周辺部分については互いに対向する電極対（１４
ａ，１４ｂ）が形成され、かつ裏面側のｎ型層の中央部
分には電極１５が形成されている。この二次元ＰＳＤ
は、浜松ホトニクスの市販品Ｓｉ１次元ＰＳＤ（位置検
出素子）を二次元の構造に拡張したものに相当する。As shown in the perspective view of FIG. 3, this two-dimensional PSD has a pn junction formed at the interface between a rectangular p-type semiconductor layer and an n-type semiconductor layer, and has a p-type junction on the front surface side. In the layer, electrode pairs (13a, 13b) facing each other are formed in the peripheral portion along one direction (x-axis direction), and the periphery along the other direction (y-axis direction) orthogonal to this is formed. The electrode pair (14
a, 14b), and an electrode 15 is formed in the central portion of the n-type layer on the back surface side. This two-dimensional PSD
Corresponds to a two-dimensional structure obtained by expanding a commercially available Si one-dimensional PSD (position detection element) of Hamamatsu Photonics.
【００１２】ｘ軸方向については、電極対（１３ａ，１
３ｂ）と電極１５とが、図４に示すように演算増幅器か
ら成る各種の回路に結線される。電極１３ａから出力さ
れる電気信号は増幅回路Ａ１で増幅されたのち、加算回
路ＡＤと減算回路ＳＢのそれぞれの一方の入力端子に供
給される。電極１３ｂから出力される電気信号は増幅回
路Ａ２で増幅されたのち、加算回路ＡＤと減算回路ＳＢ
のそれぞれの他方の入力端子に供給される。加算回路Ａ
Ｄの出力は、減衰を与える増幅回路Ａ３を経て加算信号
Σ１としてアナログ除算回路Ｕ６の一方の入力端子に供
給され、減算回路ＳＢの出力は差分信号Δ１としてその
ままアナログ除算回路Ｕ６の他方の入力端子に供給され
る。アナログ除算回路Ｕ６からは、加算信号で規格化さ
れた差分信号（Δ１／Σ１）が位置信号として出力され
る。In the x-axis direction, the electrode pair (13a, 1a
3b) and the electrode 15 are connected to various circuits composed of operational amplifiers as shown in FIG. The electric signal output from the electrode 13a is amplified by the amplifier circuit A1 and then supplied to one input terminal of each of the adder circuit AD and the subtractor circuit SB. The electric signal output from the electrode 13b is amplified by the amplifier circuit A2, and then added by the addition circuit AD and the subtraction circuit SB.
Is supplied to the other input terminal of each. Adder circuit A
The output of D is supplied to one input terminal of the analog division circuit U6 as an addition signal Σ1 via the amplification circuit A3 that gives attenuation, and the output of the subtraction circuit SB is directly output as the difference signal Δ1 to the other input terminal of the analog division circuit U6. Is supplied to. From the analog division circuit U6, a difference signal (Δ1 / Σ1) standardized by the addition signal is output as a position signal.
【００１３】上記位置信号（Δ１／Σ１）は、マーク１
で反射光され受光レンズＲＬで絞られながら二次元ＰＳ
Ｄに入射するスポットがこの二次元ＰＳＤの中心に存在
すれば、ゼロとなり、このスポットが二次元ＰＳＤの中
心からｘ軸方向に沿って左右にズレると、このズレ量に
比例しかつズレの方向に応じた極性の電圧となる。同様
に、ｙ軸方向についても、電極対（１４ａ，１５ｂ）と
電極１５とが、図４と同様に構成された演算増幅器から
成る各種の回路に同様の方法で結線され、この回路か
ら、ｙ軸方向の位置信号（Δ１／Σ１）が出力される。The position signal (Δ1 / Σ1) corresponds to the mark 1
Two-dimensional PS while being reflected by and being focused by the light receiving lens RL
If the spot incident on D exists at the center of this two-dimensional PSD, it becomes zero. If this spot shifts from the center of the two-dimensional PSD to the left and right along the x-axis direction, it is proportional to this shift amount and the direction of the shift. The voltage has a polarity corresponding to. Similarly, also in the y-axis direction, the electrode pair (14a, 15b) and the electrode 15 are connected in the same manner to various circuits including operational amplifiers configured similarly to FIG. 4, and from this circuit, y An axial position signal (Δ1 / Σ1) is output.
【００１４】マーク１のタイヤの横幅方向へのずれ量が
二次元ＰＳＤによってその中心からｘ軸方向へのずれ量
として検出され、タイヤの円周方向へのずれ量が二次元
ＰＳＤによってその中心からｙ軸方向へのずれ量として
検出されるように、マーク位置検出器２内の取付け角度
が調整されている。The amount of deviation of the mark 1 in the lateral direction of the tire is detected by the two-dimensional PSD as the amount of deviation from the center in the x-axis direction, and the amount of deviation of the tire in the circumferential direction from the center is detected by the two-dimensional PSD. The mounting angle in the mark position detector 2 is adjusted so as to be detected as a displacement amount in the y-axis direction.
【００１５】ｘ軸方向の位置検出信号は、図５に示す構
成の周波数変調回路の入力端子 Inに供給される。入力
端子 In に供給される直流電圧に応じて可変容量ダイオ
ードVCの静電容量が変化すると、この周波数変調回路の
発振周波数が変化し、出力端子 Out からはｘ軸方向の
位置検出信号に応じて変化する周波数の信号が出力され
る。同様に、ｙ軸方向の位置検出信号も、図６と同様の
構成のｙ軸用の周波数変調回路によってｙ軸方向の位置
検出信号に応じて変化する周波数の信号に変換される。The position detection signal in the x-axis direction is supplied to the input terminal In of the frequency modulation circuit configured as shown in FIG. When the capacitance of the variable-capacitance diode VC changes according to the DC voltage supplied to the input terminal In, the oscillation frequency of this frequency modulation circuit changes, and the output terminal Out responds to the position detection signal in the x-axis direction. A signal of varying frequency is output. Similarly, the position detection signal in the y-axis direction is also converted into a signal having a frequency that changes according to the position detection signal in the y-axis direction by the frequency modulation circuit for the y-axis having the same configuration as in FIG.
【００１６】ｘ軸方向の位置検出信号とＹ軸方向の位置
検出信号によって変調されたＦＭ信号は図１のアンテナ
３に供給され、空中に放射される。空中に放射されたＦ
Ｍ信号は、車体側に設置されたアンテナ（図示省略）を
経て車体側に設置されたタイヤ変形検出器に供給され
る。このタイヤ変形検出器は、ＦＭ信号復調回路とＡ／
Ｄ変換器とディジタルプロセッサとを備えており、マー
ク位置検出器２から受信したＦＭ信号を復調することに
よりｘ，ｙ各軸方向の位置検出信号を復元し、これをデ
ィジタル信号に変換し、ディジタルプロセッサで処理す
ることよって、タイヤの径などの寸法も考慮した幅方向
と円周方向の変形の程度を検出する。The FM signal modulated by the position detection signal in the x-axis direction and the position detection signal in the y-axis direction is supplied to the antenna 3 of FIG. 1 and radiated into the air. F radiated in the air
The M signal is supplied to a tire deformation detector installed on the vehicle body side via an antenna (not shown) installed on the vehicle body side. This tire deformation detector includes an FM signal demodulation circuit and an A /
A D converter and a digital processor are provided. By demodulating the FM signal received from the mark position detector 2, a position detection signal in each of the x and y axis directions is restored, and this is converted into a digital signal for digital conversion. By processing with the processor, the degree of deformation in the width direction and the circumferential direction in consideration of the tire diameter and other dimensions is detected.
【００１７】好適には、マーク位置検出器２から送出さ
れる信号には、位置検出結果の他にタイヤの種類などを
示す識別コードが含められ、この信号を受信した本体側
のタイヤ変形検出器では、この識別コードを解読するこ
とによりタイヤの種類や径などの寸法を識別する。Preferably, the signal transmitted from the mark position detector 2 includes an identification code indicating the type of tire in addition to the position detection result, and the tire deformation detector on the main body side that has received this signal. Then, the dimensions such as the type and diameter of the tire are identified by decoding the identification code.
【００１８】このタイヤ変形検出器内のディジタルプロ
セッサで検出されたタイヤの変形信号は、車両の予想走
行軌跡算定装置や、アンチロック・ブレーキ装置などの
上位装置に送出される。あるいは、上述の機能を備えた
タイヤ変形検出部を、既存の予想走行軌跡算定装置やア
ンチロック・ブレーキ装置などの上位装置内にその一部
として形成する構成を採用することもできる。The tire deformation signal detected by the digital processor in the tire deformation detector is sent to an upper-level device such as a vehicle predicted travel locus calculation device and an antilock / brake device. Alternatively, it is also possible to adopt a configuration in which the tire deformation detection unit having the above-mentioned function is formed as a part of an existing higher-level device such as an expected travel locus calculation device or an antilock / brake device.
【００１９】図６は、車両の予想走行軌跡算定装置や、
アンチロック・ブレーキ装置などの上位装置で処理され
る幅方向のタイヤ変形量と操舵力との関係の推定に利用
される特性の一例を示す概念図である。操舵力が小さい
範囲では、この操舵力にほぼ比例して幅方向へのタイヤ
の変形量が増加してゆくが、この場合の比例定数はほぼ
路面摩擦係数に比例すると推定される。同様に、加速度
や減速度と円周方向のタイヤの変形量との関係から路面
摩擦係数を推定することもできる。FIG. 6 shows a device for calculating an expected traveling locus of a vehicle,
It is a conceptual diagram which shows an example of the characteristic utilized for estimation of the relationship between the tire deformation amount in the width direction and steering force processed by a higher-level device such as an anti-lock brake device. In the range where the steering force is small, the deformation amount of the tire in the width direction increases in proportion to the steering force, but the proportional constant in this case is estimated to be approximately proportional to the road surface friction coefficient. Similarly, the road surface friction coefficient can be estimated from the relationship between the acceleration or deceleration and the tire deformation amount in the circumferential direction.
【００２０】以上、安価であるという利点を活かして二
次元ＰＳＤを利用してマークの位置を検出する構成を例
示したが、多少のコストの上昇が許容できる場合には、
ＣＣＤカメラなど他の適宜な光学装置を利用してマーク
の位置を検出する構成を採用することもできる。また、
マークの位置の検出は光学的方法に限らず、静電容量の
変化や磁気特性の変化などを利用した電磁的な位置検出
方法、あるいは、タイヤ内の所定の着目箇所と基準とな
る他の所定の箇所との間に張り渡したワイヤの張力を検
出する方法など、他の適宜な方法を適用することもでき
る。As described above, the structure for detecting the position of the mark by utilizing the two-dimensional PSD has been exemplified by taking advantage of the low cost. However, when the cost can be increased to some extent,
It is also possible to adopt a configuration in which the position of the mark is detected by using another appropriate optical device such as a CCD camera. Also,
The detection of the mark position is not limited to the optical method, but an electromagnetic position detection method utilizing a change in capacitance or a change in magnetic characteristics, or a predetermined target point in the tire and other predetermined reference points. It is also possible to apply another appropriate method such as a method of detecting the tension of the wire stretched between the wire and the point.
【００２１】また、マーク位置検出器をリムに圧入固定
することによりその先端部分をタイヤの内部に差し込む
構成を例示した。しかしながら、リムに強固な光学窓を
設けると共にマーク位置検出器をタイヤ外部のリム上な
どに設置し、光学窓を通してマーク位置を検出する構成
とすることもできる。Further, the mark position detector is press-fitted and fixed to the rim so that the tip portion thereof is inserted into the tire. However, it is also possible to provide a strong optical window on the rim and install a mark position detector on the rim outside the tire to detect the mark position through the optical window.
【００２２】さらに、マーク位置検出器に車両本体側か
ら動作電力を供給する構成を例示したが、このような電
力の供給を行うことなく、マーク位置検出器を内蔵の電
池で動作させる構成とすることもできる。また、マーク
位置検出器から本体側のタイヤ変形検出器にＦＭ信号で
検出結果を送出する構成を例示したが、ＡＭ信号等他の
変調方式を適用してもよい。さらに、無線伝送路を介し
てマーク位置の検出結果を伝達する構成を例示したが、
このマーク位置の検出結果を、動作電力の供給方法と同
様に、コイルなどによる電磁結合機構を介して本体側に
伝達する構成を採用することもできる。Further, although the structure in which the operating power is supplied to the mark position detector from the vehicle main body side has been illustrated, the mark position detector is operated by the built-in battery without supplying such power. You can also Further, although the structure in which the detection result is sent as an FM signal from the mark position detector to the tire deformation detector on the main body side is illustrated, other modulation methods such as an AM signal may be applied. Furthermore, although the configuration for transmitting the detection result of the mark position via the wireless transmission path has been exemplified,
It is also possible to adopt a configuration in which the detection result of the mark position is transmitted to the main body side through an electromagnetic coupling mechanism such as a coil, similarly to the method of supplying operating power.
【００２３】さらに、タイヤの変形の解析に必要となる
ことがあるタイヤ内の空気圧に関する情報をマーク位置
検出器で測定し、この測定結果を車両の本体側装置に伝
達する機能を付加することもできる。上述のように、二
次元方向のマーク位置の検出結果に加えて、タイヤの識
別コードや空気圧など各種のデータをマーク位置検出器
から車両の本体側に送出する構成を採用する場合には、
上述した各種の情報を含むディジタル信号を位相シフト
キーイング（ＰＳＫ）などの変調方式を利用して本体側
に送信する構成とすることもできる。Further, it is possible to add a function of measuring information about the air pressure inside the tire, which may be necessary for analyzing the deformation of the tire, by the mark position detector, and transmitting the measurement result to the vehicle body side device. it can. As described above, in addition to the detection result of the mark position in the two-dimensional direction, when adopting a configuration in which various data such as the tire identification code and air pressure are sent from the mark position detector to the vehicle body side,
It is also possible to adopt a configuration in which a digital signal including the above-mentioned various kinds of information is transmitted to the main body side using a modulation method such as phase shift keying (PSK).
【００２４】[0024]
【発明の効果】以上詳細に説明したように、本発明に係
わるタイヤの変形検出装置は、タイヤの所定の箇所に形
成されたマークの位置をこのタイヤの他の所定の箇所か
ら検出することによってこのタイヤの変形を検出する構
成であるから、車両の予測走行軌跡算定装置や、アンチ
ロック・ブレーキシステムなど各種の車両運転支援シス
テムが行う予想走行軌跡の算定や、各種の制御に必要な
路面摩擦係数などの量を高精度で推測できるなどの利点
がある。As described in detail above, the tire deformation detecting apparatus according to the present invention detects the position of the mark formed at a predetermined location of the tire from other predetermined locations of the tire. With this configuration that detects the deformation of the tires, the predicted travel path calculation device for the vehicle and the calculation of the expected travel path performed by various vehicle driving support systems such as anti-lock / brake system and the road surface friction necessary for various controls There is an advantage that the amount such as a coefficient can be estimated with high accuracy.
【００２５】また、タイヤに取り付ける二次元位置検出
センサとして安価な二次元ＰＳＤを利用することによ
り、装置の低コスト化を実現できる。Further, by using an inexpensive two-dimensional PSD as the two-dimensional position detecting sensor attached to the tire, the cost of the device can be reduced.
【図１】本発明の一実施例のタイヤの変形検出装置の主
要部を検出対象のタイヤと共に示す断面図である。FIG. 1 is a cross-sectional view showing a main part of a tire deformation detecting device according to an embodiment of the present invention together with a tire to be detected.
【図２】図１のマーク位置検出器２の光学ヘッドの構成
を例示する断面図である。2 is a cross-sectional view illustrating the configuration of an optical head of the mark position detector 2 of FIG.
【図３】図２の光学ヘッド内に設置される二次元ＰＳＤ
の構成の一例を説明するための斜視図である。FIG. 3 is a two-dimensional PSD installed in the optical head of FIG.
3 is a perspective view for explaining an example of the configuration of FIG.
【図４】図３の二次元ＰＳＤのｘ軸方向の電極対（13a,
13b)、電極15と演算増幅器とを接続して位置信号を出力
する回路の構成を示す回路図である。FIG. 4 is an electrode pair (13a, 13a, in the x-axis direction of the two-dimensional PSD of FIG.
13b) is a circuit diagram showing a configuration of a circuit that outputs a position signal by connecting the electrode 15 and the operational amplifier.
【図５】位置検出信号にで変調されたＦＭ信号を発生す
るＦＭ信号発生回路の構成の一例を示す回路図である。FIG. 5 is a circuit diagram showing an example of a configuration of an FM signal generation circuit that generates an FM signal modulated by a position detection signal.
【図６】操舵力と幅方向のタイヤ変形量との関係から路
面摩擦係数を推定する一例を説明するための特性図であ
る。FIG. 6 is a characteristic diagram for explaining an example of estimating a road surface friction coefficient from a relationship between a steering force and a tire deformation amount in a width direction.
【符号の説明】 T タイヤ R リム C クラウン部 K カーカス 1 マーク 2 マーク位置検出器 3 アンテナ 4 基板 5,6,7,8 車両の本体側からマーク位置検出器２に動作
用の交流電力を伝達するためのコイル 11 ｐ型半導体層 12 ｎ型半導体層[Explanation of symbols] T Tire R Rim C Crown K Carcass 1 Mark 2 Mark position detector 3 Antenna 4 Substrate 5,6,7,8 AC power for operation is transmitted from the vehicle body side to the mark position detector 2 Coil 11 p-type semiconductor layer 12 n-type semiconductor layer
Claims (10)
と、 このタイヤの他の所定の箇所から前記マークの位置を検
出するマーク位置検出手段と、 前記マーク位置検出手段が検出したマークの位置から前
記タイヤの変形を検出するタイヤ変形検出手段とを備え
たことを特徴とするタイヤの変形検出装置。1. A mark formed at a predetermined position of a tire, a mark position detecting means for detecting the position of the mark from another predetermined position of the tire, and a position of the mark detected by the mark position detecting means. To a tire deformation detecting means for detecting the deformation of the tire.
ると共に、前記位置検出手段はリム上の前記マークと対
向する箇所に形成されたことを特徴とするタイヤの変形
検出装置。2. The mark according to claim 1, wherein the mark is formed on an inner peripheral surface of a crown portion of the tire, and the position detecting means is formed on a rim at a position facing the mark. Deformation detection device for tire.
及び幅方向への位置の変化を検出する二次元位置検出手
段であることを特徴とするタイヤの変形検出装置。3. The tire deformation according to claim 2, wherein the position detecting unit is a two-dimensional position detecting unit that detects a change in the position of the mark in the circumferential direction and the width direction of the tire. Detection device.
装置であることを特徴とするタイヤの変形検出装置。4. The tire deformation detection device according to claim 1, wherein the position detection unit is an optical position detection device including an illumination unit.
じた大きさの電気信号を発生する二次元ＰＳＤ素子を備
えたことを特徴とするタイヤの変形を検出する装置。5. The tire deformation according to claim 4, wherein the optical position detecting means includes a two-dimensional PSD element that generates an electric signal having a magnitude corresponding to an image forming position of the mark. A device for detecting.
後者に動作電力を伝達するための非接触式の電力伝達手
段が形成されたことを特徴とするタイヤの変形検出装
置。6. The non-contact power transmission means for transmitting operating power from the former to the latter is formed between the vehicle body and the mark position detection means in each of claims 1 to 5. A tire deformation detection device characterized by:
間に、マーク位置の検出結果を電気信号として伝達する
無線伝送路が形成されたことを特徴とするタイヤの変形
検出装置。7. The wireless transmission path according to claim 1, wherein a wireless transmission path for transmitting the detection result of the mark position as an electric signal is formed between the mark position detecting means and the tire deformation detecting means. A characteristic tire deformation detection device.
このタイヤの他の所定の箇所から前記マークの位置を検
出するマーク位置検出手段及び前記マーク位置検出手段
が検出したマークの位置から前記タイヤの変形を検出す
るタイヤ変形検出手段を備えたタイヤの変形検出部と、 このタイヤ変形検出部で検出されたタイヤの変形量と、
車両の走行状態に関する物理量との関係から路面摩擦係
数を推定する路面摩擦係数推定部とを備えたことを特徴
とする車両用運転支援装置。8. A mark formed on a predetermined portion of a tire,
Deformation of a tire having mark position detecting means for detecting the position of the mark from another predetermined position of this tire and tire deformation detecting means for detecting the deformation of the tire from the position of the mark detected by the mark position detecting means The detection unit, the tire deformation amount detected by the tire deformation detection unit,
A driving assistance device for a vehicle, comprising: a road surface friction coefficient estimation unit that estimates a road surface friction coefficient from a relationship with a physical quantity relating to a running state of the vehicle.
面に形成されたマークのタイヤの幅方向の位置を検出
し、 前記路面摩擦係数推定部は、前記マーク位置検出手段で
検出されたタイヤの幅方向の変形量と、操舵力との関係
から路面摩擦係数を推定することを特徴とする車両用運
転支援装置。9. The mark position detection means according to claim 8, wherein the mark formed on the inner peripheral surface of the crown portion of the tire detects the position in the width direction of the tire, A driving assistance device for a vehicle, wherein a road surface friction coefficient is estimated from a relationship between a steering force and a deformation amount of a tire in a width direction detected by a mark position detecting means.
面に形成されたマークのタイヤの円周方向の位置を検出
し、 前記路面摩擦係数推定部は、前記マーク位置検出手段で
検出されたタイヤの円周方向の変形量と、加減速度との
関係から路面摩擦係数を推定することを特徴とする車両
用運転支援装置。10. The mark position detection means according to claim 8, wherein the mark formed on the inner peripheral surface of the crown portion of the tire detects the position in the circumferential direction of the tire, and the road surface friction coefficient estimation unit comprises: A driving assistance device for a vehicle, wherein a road surface friction coefficient is estimated from a relationship between a tire circumferential deformation amount detected by the mark position detection means and an acceleration / deceleration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02475096A JP3628792B2 (en) | 1996-01-18 | 1996-01-18 | Tire deformation detection device and vehicle driving support device using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02475096A JP3628792B2 (en) | 1996-01-18 | 1996-01-18 | Tire deformation detection device and vehicle driving support device using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09193627A true JPH09193627A (en) | 1997-07-29 |
| JP3628792B2 JP3628792B2 (en) | 2005-03-16 |
Family
ID=12146828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02475096A Expired - Fee Related JP3628792B2 (en) | 1996-01-18 | 1996-01-18 | Tire deformation detection device and vehicle driving support device using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3628792B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002002472A (en) * | 2000-06-16 | 2002-01-09 | Bridgestone Corp | Estimation method and device for road surface friction coefficient, road surface state estimation device, road surface slip alarm, and vehicle control method and device |
| JP2002036836A (en) * | 2000-07-21 | 2002-02-06 | Bridgestone Corp | Estimation method of road surface friction coefficient, device therefor, and pneumatic tire |
| KR100350999B1 (en) * | 2000-03-14 | 2002-08-30 | 금호산업 주식회사 | Method and apparatus to measure internal profile shape of tire |
| JP2007010405A (en) * | 2005-06-29 | 2007-01-18 | Yokohama Rubber Co Ltd:The | Method and device for measuring of dynamic landing shape of tire |
| US7409273B2 (en) | 2003-06-18 | 2008-08-05 | Toyota Jidosha Kabushiki Kaisha | Tire trouble detection device |
| JP2009250963A (en) * | 2008-04-11 | 2009-10-29 | Bridgestone Corp | System and method for measuring internal shape |
| JP2014097737A (en) * | 2012-11-15 | 2014-05-29 | Jtekt Corp | Four-wheel drive vehicle |
| JP2019196025A (en) * | 2018-05-07 | 2019-11-14 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Method of detecting tire strain |
| RU2707390C1 (en) * | 2019-02-11 | 2019-11-26 | Федеральное государственное казенное военное образовательное учреждение высшего образования "Военный учебно-научный центр Военно-воздушных сил "Военно-воздушная академия имени профессора Н.Е. Жуковского и Ю.А. Гагарина" (г. Воронеж) Министерства обороны Российской Федерации | Pneumatic tire deformation sensor |
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-
1996
- 1996-01-18 JP JP02475096A patent/JP3628792B2/en not_active Expired - Fee Related
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|---|---|---|---|---|
| KR100350999B1 (en) * | 2000-03-14 | 2002-08-30 | 금호산업 주식회사 | Method and apparatus to measure internal profile shape of tire |
| JP4703817B2 (en) * | 2000-06-16 | 2011-06-15 | 株式会社ブリヂストン | Road surface friction coefficient estimation method, road surface friction coefficient estimation device, road surface state estimation method, road surface state estimation device, and road slip warning device |
| JP2002002472A (en) * | 2000-06-16 | 2002-01-09 | Bridgestone Corp | Estimation method and device for road surface friction coefficient, road surface state estimation device, road surface slip alarm, and vehicle control method and device |
| JP2002036836A (en) * | 2000-07-21 | 2002-02-06 | Bridgestone Corp | Estimation method of road surface friction coefficient, device therefor, and pneumatic tire |
| US7409273B2 (en) | 2003-06-18 | 2008-08-05 | Toyota Jidosha Kabushiki Kaisha | Tire trouble detection device |
| JP2007010405A (en) * | 2005-06-29 | 2007-01-18 | Yokohama Rubber Co Ltd:The | Method and device for measuring of dynamic landing shape of tire |
| JP4735079B2 (en) * | 2005-06-29 | 2011-07-27 | 横浜ゴム株式会社 | Tire dynamic contact shape measurement method |
| JP2009250963A (en) * | 2008-04-11 | 2009-10-29 | Bridgestone Corp | System and method for measuring internal shape |
| JP2014097737A (en) * | 2012-11-15 | 2014-05-29 | Jtekt Corp | Four-wheel drive vehicle |
| JP2019196025A (en) * | 2018-05-07 | 2019-11-14 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Method of detecting tire strain |
| WO2020131539A1 (en) | 2018-12-21 | 2020-06-25 | Bridgestone Americas Tire Operations, Llc | Tire deflection sensing system |
| JP2022515113A (en) * | 2018-12-21 | 2022-02-17 | ブリヂストン アメリカズ タイヤ オペレーションズ、 エルエルシー | Tire deflection detection system |
| EP3898293A4 (en) * | 2018-12-21 | 2022-09-07 | Bridgestone Americas Tire Operations, LLC | Tire deflection sensing system |
| RU2707390C1 (en) * | 2019-02-11 | 2019-11-26 | Федеральное государственное казенное военное образовательное учреждение высшего образования "Военный учебно-научный центр Военно-воздушных сил "Военно-воздушная академия имени профессора Н.Е. Жуковского и Ю.А. Гагарина" (г. Воронеж) Министерства обороны Российской Федерации | Pneumatic tire deformation sensor |
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