JP2002350126A - Apparatus for measuring distance of object to be inspected - Google Patents
Apparatus for measuring distance of object to be inspectedInfo
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- JP2002350126A JP2002350126A JP2001158205A JP2001158205A JP2002350126A JP 2002350126 A JP2002350126 A JP 2002350126A JP 2001158205 A JP2001158205 A JP 2001158205A JP 2001158205 A JP2001158205 A JP 2001158205A JP 2002350126 A JP2002350126 A JP 2002350126A
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- distance
- value
- distance signal
- output
- signal
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- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えばアライメン
トテスタやタイヤ等の外形状計測装置等に好適で、簡単
な構成でタイヤのサイドウォ−ルの凹凸部等の影響を除
去し、正確な距離測定値を合理的かつ速やかに得られる
とともに、これを安価に製作できるようにした被検体の
距離測定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable, for example, for an external shape measuring device such as an alignment tester or a tire, etc., and removes the influence of irregularities of a side wall of a tire with a simple structure to accurately measure a distance. The present invention relates to a subject distance measuring device capable of obtaining a value rationally and promptly and manufacturing the value inexpensively.
【０００２】[0002]
【従来の技術】出願人は、複数の超音波センサを用い、
該センサから発する超音波を回転下のタイヤ側面の所定
位置に照射し、前記センサとタイヤ側面との距離を計測
して、ト−およびキャンバ値を演算するようにしたホイ
−ルアライメントテスタを開発し、これを既に実公平５
−２８４８４号公報に提案している。2. Description of the Related Art Applicants use a plurality of ultrasonic sensors,
Developed a wheel alignment tester that irradiates ultrasonic waves emitted from the sensor to a predetermined position on the side of the tire under rotation, measures the distance between the sensor and the side of the tire, and calculates toe and camber values. And this has already been
-28484.
【０００３】しかし、この従来のホイ−ルアライメント
テスタは、超音波を照射するタイヤのサイドウォ−ルに
ロゴマ−ク等の凹凸部が存在すると、その凹凸分の誤差
を生じて、センサとタイヤ側面との距離が変化し、正確
なアライメント測定値を得られない、という問題があっ
た。However, in this conventional wheel alignment tester, if there is an uneven portion such as a logo mark on a side wall of a tire to which an ultrasonic wave is irradiated, an error corresponding to the unevenness is generated, and the sensor and the tire side surface are distorted. And the distance between the target and the alignment changes, and an accurate alignment measurement value cannot be obtained.
【０００４】このような問題を解決するものとして、例
えば特公平７−１１１３３３号公報には、凹凸部を有す
るタイヤの測定部位を走査する光学式変位計と、前記凹
凸部に対応するサンプリングデ−タを除去補正する信号
補正手段と、補正された信号に基いて所定の形状計測を
行なう計測手段とを備え、前記信号補正手段として、サ
ンプリングデ−タを高速フ−リエ変換により、周波数領
域に変換する変換機能と、予め設定された周波数以上の
成分を除去する除去機能と、周波数領域から逆高速フ−
リエ変換により、時間領域に変換する逆変換機能とを備
え、除去周波数を予め設定するだけで、再現性の良い凹
凸成分を除去するようにした、タイヤ等の外形状計測装
置が示されている。To solve such a problem, for example, Japanese Patent Publication No. 7-111333 discloses an optical displacement meter that scans a measurement site of a tire having an uneven portion, and a sampling data corresponding to the uneven portion. Signal correcting means for removing and correcting data, and measuring means for performing a predetermined shape measurement based on the corrected signal. As the signal correcting means, sampling data is converted into a frequency domain by a high-speed Fourier transform. A conversion function for conversion, a removal function for removing components having a frequency equal to or higher than a predetermined frequency, and an inverse high-speed flow from the frequency domain.
An external shape measuring device such as a tire, which has an inverse conversion function of converting to a time domain by a Rier transform and is configured to remove uneven components with good reproducibility only by setting a removal frequency in advance, is shown. .
【０００５】しかし、前記計測装置は、高速フ−リエ変
換と逆高速フ−リエ変換を行なうため、かなりの処理時
間を要し、しかも高価である等の問題があった。[0005] However, the measuring device has a problem that it requires a considerable processing time and is expensive because it performs high-speed Fourier transform and inverse high-speed Fourier transform.
【０００６】[0006]
【発明が解決しようとする課題】本発明はこのような問
題を解決し、例えばアライメントテスタやタイヤ等の外
形状計測装置等に好適で、簡単な構成でタイヤのサイド
ウォ−ルの凹凸部等の影響を除去し、正確な距離測定値
を合理的かつ速やかに得られるとともに、これを安価に
製作できる被検体の距離測定装置を提供することを目的
とする。SUMMARY OF THE INVENTION The present invention solves such a problem and is suitable for, for example, an alignment tester or an outer shape measuring device for a tire or the like, and has a simple structure such as an uneven portion of a side wall of a tire. It is an object of the present invention to provide an object distance measuring apparatus capable of removing an influence, obtaining an accurate distance measurement value rationally and promptly, and manufacturing it at low cost.
【０００７】[0007]
【課題を解決するための手段】このため、請求項１の発
明は、距離センサと被検体の複数位置との間の距離信号
のうち、異常な距離信号を除去可能な被検体の距離測定
装置において、前記距離信号の異常の有無を検出後、全
ての距離信号を直前の測定位置における出力値を基に補
正し、該補正値と当該距離信号値との差を基に、前記補
正値または当該距離信号値を出力可能にし、距離信号の
異常検出後、全ての距離信号を一旦補正し、該補正値を
当該距離信号値と比較して、前記補正値または当該距離
信号値を出力し、前記距離信号の採否を正確かつ合理的
に決定し、例えばタイヤ側面のロゴによる異常な距離信
号に伴なう、測定値の信頼性低下を防止し、アライメン
トテスタやタイヤ等の外形状計測装置に好適にしてい
る。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an object distance measuring apparatus capable of removing an abnormal distance signal from distance signals between a distance sensor and a plurality of positions of the object. In, after detecting the presence or absence of abnormality in the distance signal, all distance signals are corrected based on the output value at the immediately preceding measurement position, and based on the difference between the corrected value and the distance signal value, the correction value or Enable to output the distance signal value, after detecting the abnormality of the distance signal, once correct all distance signals, compare the correction value with the distance signal value, output the correction value or the distance signal value, Determine whether or not to adopt the distance signal accurately and rationally, for example, due to an abnormal distance signal by the logo on the side of the tire, to prevent a decrease in the reliability of the measured value, and to measure the outer shape of an alignment tester or tire. It is suitable.
【０００８】請求項２の発明は、相前後する測定位置の
距離信号同士の差を演算して、異常な距離信号を検出可
能にし、従来のような高度な処理法を要せず、簡単な処
理法によって異常信号を正確かつ迅速に処理し、これを
安価に製作できるようにしている。請求項３の発明は、
前記異常距離信号検出後、該異常距離信号の出力値を、
直前の測定位置における出力値に補正可能にし、前記異
常距離信号を一旦キャンセルし、異常な距離信号に伴な
う測定値の信頼性低下を防止するとともに、直近の距離
信号を暫定的に採用し、その合理性を得るようにしてい
る。According to a second aspect of the present invention, a difference between distance signals at successive measurement positions is calculated, and an abnormal distance signal can be detected. An abnormal signal is accurately and promptly processed by a processing method, so that it can be manufactured at a low cost. The invention of claim 3 is
After detecting the abnormal distance signal, the output value of the abnormal distance signal,
The output value at the immediately preceding measurement position can be corrected, the abnormal distance signal is temporarily canceled, the reliability of the measured value accompanying the abnormal distance signal is prevented from deteriorating, and the latest distance signal is provisionally adopted. Try to get that rationality.
【０００９】請求項４の発明は、前記異常距離信号検出
後、正常距離信号の出力値を、直前の測定位置における
出力値に当該変化量を加算して補正可能にし、前記正常
距離信号を精密かつ詳細に出力し、精密な測定値を得ら
れるようにしている。請求項５の発明は、前記補正値と
当該距離信号値との差が所定値以内のとき、前記距離信
号値を出力可能にし、近隣の距離信号の動態を基に当該
距離信号の出力を採択し、その合理性を得るようにして
いる。請求項６の発明は、前記補正値と当該距離信号値
との差が所定値以上のとき、前記補正値を出力可能にし
て、異常距離信号部の出力をキャンセルし、近隣の距離
信号の動態を基に前記補正値の出力を採択して、その合
理性を得るようにしている。According to a fourth aspect of the present invention, after the detection of the abnormal distance signal, the output value of the normal distance signal can be corrected by adding the amount of change to the output value at the immediately preceding measurement position, and the normal distance signal can be precisely corrected. In addition, it outputs in detail so that accurate measurement values can be obtained. According to a fifth aspect of the present invention, when the difference between the correction value and the distance signal value is within a predetermined value, the distance signal value can be output, and the output of the distance signal is adopted based on the dynamics of a nearby distance signal. And try to get that rationality. According to a sixth aspect of the present invention, when the difference between the correction value and the distance signal value is equal to or greater than a predetermined value, the correction value can be output, the output of the abnormal distance signal portion is canceled, and the dynamics of the nearby distance signal is changed. , The output of the correction value is adopted to obtain its rationality.
【００１０】[0010]
【発明の実施の形態】以下、本発明をアライメントテス
タに適用した図示の実施形態について説明すると、図１
乃至図６において１，２は自動車製造工場内の検査ライ
ン、車検場、自動車整備工場等の床面に回転可能に設置
された一対のロ−ラで、この一方をモ−タ等の駆動源に
連係しており、前記ロ−ラ１，２上に被検体である車両
の車輪３（タイヤ）が回転可能に載置されている。図
中、４は前記車輪３のサイドウォ−ルの所定位置に形成
したロゴ等の凹凸部である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention applied to an alignment tester will now be described with reference to FIG.
In FIGS. 6 to 6, reference numerals 1 and 2 denote a pair of rollers rotatably mounted on the floor of an inspection line, an inspection hall, an automobile repair shop or the like in an automobile manufacturing factory, one of which is a driving source such as a motor. A wheel 3 (tire) of a vehicle as a subject is rotatably mounted on the rollers 1 and 2. In the figure, reference numeral 4 denotes an uneven portion such as a logo formed at a predetermined position on the side wall of the wheel 3.
【００１１】前記各車輪３の外側に、距離センサである
複数の超音波センサ５〜７が設けられ、これらのセンサ
５〜７は同一円周上に等角度（９０°）位置に配置さ
れ、このうち超音波センサ５，７は水平面上に配置さ
れ、超音波センサ６はそれらより上方に配置されてい
る。A plurality of ultrasonic sensors 5 to 7 as distance sensors are provided outside each of the wheels 3, and these sensors 5 to 7 are arranged at equal angles (90 °) on the same circumference. Of these, the ultrasonic sensors 5 and 7 are arranged on a horizontal plane, and the ultrasonic sensor 6 is arranged above them.
【００１２】前記超音波センサ５〜７は、例えば１秒間
に１００回の割合で超音波を発射し、車輪３が回転する
場合は、車輪３が１／１００回転する毎に、換言すれば
車輪３の外周を１００等分した各位置で、ト−およびキ
ャンバに関する情報、すなわち距離Ｌ1〜Ｌ3 を計測可
能にしており、この信号を後述の制御装置の演算器へ入
力可能にしている。なお、超音波センサ５，７から車輪
３の中心位置までの距離Ｌは、前記距離Ｌ 1，Ｌ2信号を
基に演算器で演算され、Ｌ＝（Ｌ1＋Ｌ2）／２として求
められる。The ultrasonic sensors 5 to 7 are, for example, for one second.
Emits ultrasonic waves at a rate of 100 times, and the wheel 3 rotates
In each case, every time the wheel 3 rotates 1/100, in other words,
At each position where the outer periphery of the wheel 3 is divided into 100 equal parts, the toe and key
Information about the chamber, that is, the distance L1~ LThreeCan be measured
This signal is input to the arithmetic unit of the control unit described later.
Power is possible. It should be noted that the wheels from the ultrasonic sensors 5 and 7
3 is the distance L 1, LTwoSignal
Is calculated by a computing unit based on L = (L1+ LTwo) / 2
Can be
【００１３】すなわち、超音波センサ５〜７は、超音波
を発射してからその反射波が得られるまでの時間を計測
することで、超音波の発射位置から車輪３の外側面所定
位置までの距離Ｌ1〜Ｌ3 を計測可能にしている。前記
距離信号はＡ／Ｄ変換器８を介して制御装置９へ入力さ
れ、該装置９は記憶機能と演算機能を備えたマイクロコ
ンピュ−タを内蔵し、該装置９に図４に示す制御フロ−
が記憶されている。That is, the ultrasonic sensors 5 to 7 measure the time from when the ultrasonic wave is emitted until the reflected wave is obtained, so that the distance from the ultrasonic wave emission position to the predetermined position on the outer surface of the wheel 3 is measured. the distance L 1 ~L 3 are to be measured. The distance signal is input to the control device 9 via the A / D converter 8, and the device 9 has a built-in microcomputer having a storage function and an arithmetic function. −
Is stored.
【００１４】前記制御装置９は、被検車両の各車輪３が
所定の計測位置へ移動したところで、制御作動を開始
し、超音波センサ５〜７をＯＮし、各センサ５〜７から
対応する車輪３に向けて超音波を発射し、その反射波が
得られるまでの時間を計測して、超音波の発射位置から
車輪３の外側面の各位置までの距離Ｌ1〜Ｌ3 を測定す
るようにしている。When each wheel 3 of the vehicle to be inspected moves to a predetermined measurement position, the control device 9 starts a control operation, turns on the ultrasonic sensors 5 to 7, and responds from each of the sensors 5 to 7. The ultrasonic wave is emitted toward the wheel 3 and the time until the reflected wave is obtained is measured, and the distances L 1 to L 3 from the ultrasonic wave emission position to each position on the outer surface of the wheel 3 are measured. Like that.
【００１５】前記距離の測定デ−タは、刻々と制御装置
９の演算部に入力され、該演算部で相前後する前記測定
デ−タの変化量を演算される。すなわち、図４の連続す
る各測定位置Ｐ1〜Ｐ7において、相前後する測定デ−タ
の差である変化量Δ1〜Δ7を演算し、その絶対値が所定
範囲内であるか否かを判定する。The measurement data of the distance is input to an arithmetic unit of the control unit 9 every moment, and the arithmetic unit calculates the amount of change of the measurement data which is successive. That is, in each measurement position P 1 to P 7 of consecutive 4, measured de preceding and succeeding - calculates the change amount Δ 1 ~Δ 7 is the difference data, the the absolute value is within a predetermined range not Is determined.
【００１６】前記変化量Δの許容限界を規定する規定値
は、前記凹凸部４の略凹凸変位に相当して設定され、こ
れは各測定デ−タに対し等しく設定されていて、前記変
化量Δがその所定値を逸脱している場合、例えば図４の
Ｐ3，Ｐ5，Ｐ6の場合は、一つ前、すなわち直前の測定
位置における最終的な出力値を補正値として仮出力する
ようにしている。The specified value for defining the permissible limit of the change amount Δ is set corresponding to the substantially uneven displacement of the uneven portion 4, which is set equally for each measurement data. When Δ deviates from the predetermined value, for example, in the case of P 3 , P 5 , and P 6 in FIG. 4, the final output value at the previous measurement position, that is, the immediately preceding measurement position is provisionally output as a correction value. Like that.
【００１７】一方、前記変化量Δがその所定値以内の場
合、例えば図４のＰ2，Ｐ4，Ｐ7の場合は、一つ前、す
なわち直前の測定箇所における出力値にそれらの変化量
Δ2，Δ4，Δ7を加算した値を、補正値として仮出力す
るようにしている。On the other hand, when the variation Δ is within the predetermined value, for example, in the case of P 2 , P 4 , and P 7 in FIG. A value obtained by adding Δ 2 , Δ 4 , and Δ 7 is temporarily output as a correction value.
【００１８】次に前記仮出力値、つまり補正値を各測定
デ−タと比較し、それらの差δ1〜δ7を演算し、その絶
対値が所定値以内であるか否かを判定する。前記所定値
は、前記変化量判定時の規定値と略等値に設定され、前
記仮出力値と各測定デ−タとの差が所定値以内の場合、
例えばδ6の場合は、当該測定デ−タを最終的な出力値
として出力するようにしている。Next, the tentative output value, that is, the correction value is compared with each measurement data, and their differences δ 1 to δ 7 are calculated to determine whether or not the absolute value is within a predetermined value. . The predetermined value is set to a value substantially equal to a specified value at the time of the change amount determination, and when a difference between the provisional output value and each measurement data is within a predetermined value,
If for example, the [delta] 6, the measurement de - and to output the data as a final output value.
【００１９】一方、仮出力値、つまり補正値と各測定デ
−タとの差が所定値を逸脱する場合、例えばδ3および
δ6の場合は、前記仮出力値を最終的な出力値として出
力するようにしている。On the other hand, when the temporary output value, that is, the difference between the correction value and each measurement data deviates from a predetermined value, for example, δ 3 and δ 6 , the temporary output value is used as the final output value. Output.
【００２０】そして、前記制御装置９は、各測定位置Ｐ
1〜Ｐ7における前記距離Ｌ1〜Ｌ3の最終的な出力値を基
に、記憶部に記憶されたト−およびキャンバの演算式に
よってト−およびキャンバを演算し、それらをＣＲＴ等
に出力して表示可能にしている。Then, the control device 9 controls each measurement position P
Based on the final output values of the distance L 1 ~L 3 in 1 to P 7, bets stored in the storage unit - taken by arithmetic expression and camber - calculates a and camber, outputs them to the CRT or the like And make it displayable.
【００２１】その他、図中１０は超音波センサ５〜７を
内部に収容した空気吹出管で、空気導管を介してエア−
チャンバ(共に図示略)に連通し、超音波の伝搬路の温度
変化を抑制し、超音波の伝搬速度のバラツキを防止する
ようにしている。In addition, reference numeral 10 in the drawing denotes an air blow-out pipe containing ultrasonic sensors 5 to 7 therein, and an air blower is provided through an air conduit.
The chamber communicates with a chamber (both not shown) to suppress a change in temperature of an ultrasonic wave propagation path and to prevent a variation in ultrasonic wave propagation speed.
【００２２】なお、前述の実施形態では車輪３をロ−ラ
１，２上で回転し、車輪３の多点位置で各距離Ｌ1〜Ｌ3
を測定しているが、アライメント調整下の車輪３を揺動
可能なタ−ンテ−ブル上に載せ、前記調整作業下で車輪
３を揺動または回動させながら、車輪３の一定域の多点
位置で各距離Ｌ1〜Ｌ3を測定するようにしてもよい。In the above-described embodiment, the wheels 3 are rotated on the rollers 1 and 2, and the distances L 1 to L 3 are set at multiple points of the wheels 3.
The wheel 3 under alignment adjustment is placed on a swingable turntable, and while the wheel 3 is rocked or rotated under the adjustment operation, a large area of the wheel 3 is adjusted. it may be measured each distance L 1 ~L 3 at point position.
【００２３】このように構成した被検体の距離測定装置
は、後述のように各測定デ−タ同士の差や、各測定デ−
タと許容値との差といった簡単な演算処理で行ない、従
来の高速フ−リエ変換や逆高速フ−リエ変換のような高
度な演算処理を要せず、処理時間の高速化と制御装置９
の低廉化を図れる。The apparatus for measuring the distance to the subject constructed as described above can be used for measuring the difference between the measurement data and the measurement data as described later.
The processing is performed by simple arithmetic processing such as the difference between the data and the allowable value, and does not require advanced arithmetic processing such as conventional high-speed Fourier transform or inverse high-speed Fourier transform.
Can be reduced.
【００２４】次に前記アライメントテスタによって、車
輪３のアライメントを測定する場合は、被検車両の車輪
３をロ−ラ１，２上に乗り込ませ、該ロ−ラ１，２を回
転して車輪３を回転する。そして、超音波センサ５〜７
をＯＮし、各超音波センサ５〜７から対応する車輪３に
向けて超音波を発射し、例えば１秒間に１００回の割合
で超音波を発射し、車輪３が１／１００回転する毎に、
換言すれば車輪３の外周を１００等分した各位置で、超
音波の発射位置から車輪３の外側面の各位置までの距離
Ｌ1〜Ｌ3を測定する。その際、各吹出管１０から空気を
吹き出し、超音波の伝搬路の温度変化を抑制する。Next, when the alignment of the wheel 3 is measured by the alignment tester, the wheel 3 of the vehicle to be inspected is loaded on the rollers 1 and 2, and the rollers 1 and 2 are rotated and the wheels 3 are rotated. Rotate 3 And the ultrasonic sensors 5 to 7
Is turned on, and ultrasonic waves are emitted from each of the ultrasonic sensors 5 to 7 toward the corresponding wheel 3. For example, ultrasonic waves are emitted at a rate of 100 times per second, and each time the wheel 3 rotates 1/100 times. ,
In other words in each position the outer periphery of the wheel 3 100 equal parts if, to measure the distance L 1 ~L 3 from the launch position of the ultrasound to the respective positions of the outer side surface of the wheel 3. At this time, air is blown out from each blow-out tube 10 to suppress a temperature change in the ultrasonic wave propagation path.
【００２５】前記距離Ｌ1〜Ｌ3の計測信号は、測定デ−
タとして刻々と制御装置９の演算部に入力され、該演算
部で相前後する前記測定デ−タの変化量Δを演算する。
すなわち、連続する各測定位置Ｐ1〜Ｐ7において、相前
後する測定デ−タ同士の差である変化量Δ1〜Δ7を演算
し、その絶対値が所定範囲内であるか否かを判定する。The measurement signals of the distances L 1 to L 3 are measured data
The measured data is input to the arithmetic unit of the control device 9 every moment, and the arithmetic unit calculates the amount of change Δ of the measurement data that is successive.
That is, at successive measurement positions P 1 to P 7 , change amounts Δ 1 to Δ 7 which are differences between successive measurement data are calculated, and whether or not the absolute value is within a predetermined range is determined. judge.
【００２６】そして、前記変化量Δが所定値を逸脱して
いるＰ3，Ｐ5，Ｐ6の場合は、その一つ前の測定位置、
つまりＰ2，Ｐ4，Ｐ5における最終的な出力値を補正値
として仮出力する。このような場合として、例えば
Ｐ3，Ｐ5，Ｐ6が凹凸部４位置であることが推測され
る。このようにすることで、図６（ｂ）のように異常な
変化量Δを検出した測定位置では、当該測定デ−タをキ
ャンセルし、図６（ｃ）のように異常検出部におけるデ
−タを零値にし、当該異常デ−タによるアライメント測
定値の信頼性低下を未然に防止する。In the case of P 3 , P 5 , and P 6 in which the change amount Δ deviates from a predetermined value, the measurement position immediately before that,
That is, the final output values at P 2 , P 4 , and P 5 are provisionally output as correction values. In such a case, for example, it is presumed that P 3 , P 5 , and P 6 are located at the position of the uneven portion 4. In this way, the measurement data is canceled at the measurement position where the abnormal change amount Δ is detected as shown in FIG. 6B, and the data in the abnormality detection unit is canceled as shown in FIG. 6C. The data is set to a zero value to prevent the reliability of the alignment measurement value from being lowered due to the abnormal data.
【００２７】一方、前記変化量Δが所定値以内の場合、
例えば図４のＰ2，Ｐ4，Ｐ7の場合は、一つ前の測定位
置、つまり直前のＰ1，Ｐ3，Ｐ6における出力値に、前
記変化量Δ2，Δ4，Δ7（Δ7＝０）加算した値を、補正
値として仮出力する。この場合、Δ7は零であるから、
Ｐ7の補正値は測定デ−タと等値である。このようにす
ることで、正常な変化量Δを許容し、これを正常なデ−
タとして採用して、アライメント測定値の信頼性を維持
する。On the other hand, when the variation Δ is within a predetermined value,
For example, in the case of P 2 , P 4 , and P 7 in FIG. 4, the change amounts Δ 2 , Δ 4 , and Δ 7 are added to the output values at the immediately preceding measurement position, that is, the immediately preceding P 1 , P 3 , and P 6 . (Δ 7 = 0) The added value is temporarily output as a correction value. In this case, since Δ 7 is zero,
Correction value of P 7 measurement de - is the data and equality. In this manner, a normal change amount Δ is allowed, and the normal change amount Δ
To maintain the reliability of alignment measurements.
【００２８】次に前記仮出力値、つまり補正値を各測定
デ−タと比較し、それらの差δ1〜δ7を演算して、その
絶対値が所定値以内であるか否かを判定する。前記所定
値は、前記変化量判定時の所定値と等値に設定され、前
記仮出力値と各測定デ−タとの差が所定値以内の場合、
例えばＰ6の場合は、当該測定デ−タを最終的な出力値
として出力する。Next, the tentative output value, that is, the correction value is compared with each measurement data, and their differences δ 1 to δ 7 are calculated to determine whether or not the absolute value is within a predetermined value. I do. The predetermined value is set to be equal to the predetermined value at the time of the change amount determination, and when a difference between the provisional output value and each measurement data is within a predetermined value,
For example, in the case of P 6, the measurement de - it outputs the data as a final output value.
【００２９】一方、仮出力値、つまり補正値と各測定デ
−タとの差が所定値を逸脱する場合、例えばＰ3および
Ｐ6の場合は、前記補正値を最終的な出力値として出力
する。このように一旦キャンセルした異常デ−タに対
し、直前位置の出力値との異常の有無をチェックするこ
とで、異常デ−タの当否を再評価し、その真偽を確認し
て当該デ−タの採否を決定し、アライメント測定値の信
頼性を維持する。On the other hand, the provisional output value, i.e. the correction values and the measured de - when the difference between the motor deviates from the predetermined value, for example in the case of P 3 and P 6, outputs the correction value as a final output value I do. By checking the abnormal data once canceled as described above for the presence or absence of an abnormality with the output value at the immediately preceding position, whether the abnormal data is correct or not is re-evaluated. Data and maintain the reliability of the alignment measurements.
【００３０】したがって、例えば測定デ−タが図５のよ
うに漸増若しくは漸減傾向から、微少な増減を繰り返す
通常傾向へ移行し、または漸増若しくは漸減傾向から反
転して反対側傾向へ移行する場合の測定デ−タの動態
を、正確かつ合理的に評価するTherefore, for example, when the measured data shifts from a gradually increasing or decreasing tendency as shown in FIG. 5 to a normal tendency in which a slight increase and decrease is repeated, or when the measuring data shifts from the gradually increasing or decreasing tendency to the opposite tendency. Evaluate the dynamics of measurement data accurately and rationally
【００３１】このような点を踏まえて前記各測定距離Ｌ
1〜Ｌ3を補正すると、図６（ａ）の異常デ−タ位置に相
当する凹凸は、図６（ｄ）の最終出力デ−タから消去さ
れ、また各測定デ−タの増減傾向が確認できる。したが
って、異常な測定デ−タによるアライメント測定値の信
頼性低下を免れ、アライメント調整を正確に行なえるBased on the above points, each of the measurement distances L
When correcting the 1 ~L 3, the abnormality data of FIG. 6 (a) - irregularities corresponding to data locations, the final output data of FIG. 6 (d) - the tendency of increase or decrease motor - is erased from the data, and each measurement de You can check. Therefore, it is possible to prevent the reliability of the alignment measurement value from being degraded due to abnormal measurement data and to perform the alignment adjustment accurately.
【００３２】前記制御装置９は、超音波センサ５，７か
ら車輪３の中心位置までの距離Ｌを、前記距離Ｌ1，Ｌ2
信号を基に演算器において、Ｌ＝（Ｌ1＋Ｌ2）／２とし
て演算し、該演算値と各測定箇所Ｐ1〜Ｐ7における前記
距離Ｌ1〜Ｌ3の最終的な出力値を基に、記憶部に記憶さ
れたト−およびキャンバの演算式によってト−およびキ
ャンバを演算し、それらをＣＲＴ等に出力して表示す
る。The control device 9 calculates the distance L from the ultrasonic sensors 5 and 7 to the center of the wheel 3 by the distances L 1 and L 2.
The arithmetic unit calculates L = (L 1 + L 2 ) / 2 based on the signal, and calculates the calculated value and the final output value of the distances L 1 to L 3 at the respective measurement points P 1 to P 7 . Then, the toe and camber are calculated according to the toe and camber calculation formulas stored in the storage unit, and they are output to a CRT or the like and displayed.
【００３３】[0033]
【発明の効果】以上のように、請求項１の発明は、距離
信号の異常の有無を検出後、全ての距離信号を直前の測
定位置における出力値を基に補正し、該補正値と当該距
離信号値との差を基に、前記補正値または当該距離信号
値を出力可能にしたから、距離信号の異常検出後、全て
の距離信号を一旦補正し、該補正値を当該距離信号値と
比較して、前記補正値または当該距離信号値を出力し、
前記距離信号の採否を正確かつ合理的に決定し、例えば
タイヤ側面のロゴによる異常な距離信号に伴なう、測定
値の信頼性低下を防止することができ、アライメントテ
スタやタイヤ等の外形状計測装置に好適な効果がある。As described above, according to the first aspect of the present invention, after detecting the presence or absence of an abnormality in the distance signal, all the distance signals are corrected based on the output value at the immediately preceding measurement position, and the correction value and the corresponding correction value are detected. Based on the difference from the distance signal value, the correction value or the distance signal value can be output.After detecting the abnormality of the distance signal, all the distance signals are corrected once, and the correction value is determined as the distance signal value. Comparing, outputting the correction value or the distance signal value,
It is possible to accurately and rationally determine the adoption or non-use of the distance signal, for example, an abnormal distance signal due to a logo on the side of the tire can prevent a decrease in the reliability of the measured value, and the outer shape of an alignment tester, a tire, etc. There is an effect suitable for the measuring device.
【００３４】請求項２の発明は、相前後する測定位置の
距離信号同士の差を演算して、異常な距離信号を検出可
能にしたから、従来のような高度な処理法を要せず、簡
単な処理法によって異常信号を正確かつ迅速に処理し、
これを安価に製作することができる。請求項３の発明
は、前記異常距離信号検出後、該異常距離信号の出力値
を、直前の測定位置における出力値に補正可能にしたか
ら、前記異常距離信号を一旦キャンセルし、異常な距離
信号に伴なう測定値の信頼性低下を防止できるととも
に、直近の距離信号を暫定的に採用し、その合理性を得
ることができる。According to the second aspect of the present invention, a difference between distance signals at successive measurement positions is calculated and an abnormal distance signal can be detected. Process abnormal signals accurately and quickly with simple processing methods,
This can be manufactured at low cost. The invention according to claim 3 is that, after the detection of the abnormal distance signal, the output value of the abnormal distance signal can be corrected to the output value at the immediately preceding measurement position. Can be prevented from deteriorating the reliability of the measured values, and the rationality can be obtained by provisionally using the nearest distance signal.
【００３５】請求項４の発明は、前記異常距離信号検出
後、正常距離信号の出力値を、直前の測定位置における
出力値に当該変化量を加算して補正可能にしたから、前
記正常距離信号を精密かつ詳細に出力し、精密な測定値
を得ることができる。請求項５の発明は、前記補正値と
当該距離信号値との差が所定値以内のとき、前記距離信
号値を出力可能にしたから、近隣の距離信号の動態を基
に当該距離信号の出力を採択し、その合理性を得ること
ができる。請求項６の発明は、前記補正値と当該距離信
号値との差が所定値以上のとき、前記補正値を出力可能
にしたから、異常距離信号部の出力をキャンセルし、近
隣の距離信号の動態を基に前記補正値の出力を採択し
て、その合理性を得られる等の効果がある。According to a fourth aspect of the present invention, after detecting the abnormal distance signal, the output value of the normal distance signal can be corrected by adding the amount of change to the output value at the immediately preceding measurement position. Can be output precisely and in detail, and a precise measurement value can be obtained. According to a fifth aspect of the present invention, when the difference between the correction value and the distance signal value is within a predetermined value, the distance signal value can be output, so that the output of the distance signal is performed based on the dynamics of a nearby distance signal. And obtain its rationality. According to a sixth aspect of the present invention, when the difference between the correction value and the distance signal value is equal to or greater than a predetermined value, the correction value can be output. By adopting the output of the correction value based on the dynamics, there is an effect that the rationality can be obtained.
【図１】本発明によるアライメント測定の状況を示す説
明図である。FIG. 1 is an explanatory diagram showing a situation of alignment measurement according to the present invention.
【図２】本発明によるト−の測定状況を示す説明図であ
る。FIG. 2 is an explanatory diagram showing a measurement state of a toe according to the present invention.
【図３】本発明によるキャンバの測定状況を示す説明図
である。FIG. 3 is an explanatory diagram showing a measurement state of a camber according to the present invention.
【図４】本発明による制御フロ−を示すチャ−トであ
る。FIG. 4 is a chart showing a control flow according to the present invention.
【図５】本発明による距離信号の補正状況を示す説明図
である。FIG. 5 is an explanatory diagram showing a correction state of a distance signal according to the present invention.
【図６】本発明による距離信号の処理状況を順に示すタ
イミングチャ−トである。FIG. 6 is a timing chart sequentially showing the processing status of a distance signal according to the present invention.
３ 被検体（車輪） ５〜７ 距離センサ Ｌ1〜Ｌ3 距離信号3 Subject (wheel) 5-7 Distance sensor L 1 -L 3 Distance signal
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2F068 AA06 AA32 CC03 DD03 FF03 FF12 FF25 KK14 2F069 AA61 AA71 BB27 BB28 EE02 GG04 GG09 GG58 JJ17 MM02 NN08 QQ10 RR01 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F068 AA06 AA32 CC03 DD03 FF03 FF12 FF25 KK14 2F069 AA61 AA71 BB27 BB28 EE02 GG04 GG09 GG58 JJ17 MM02 NN08 QQ10 RR01
Claims (6)
距離信号のうち、異常な距離信号を除去可能な被検体の
距離測定装置において、前記距離信号の異常の有無を検
出後、全ての距離信号を直前の測定位置における出力値
を基に補正し、該補正値と当該距離信号値との差を基
に、前記補正値または当該距離信号値を出力可能にした
ことを特徴とする被検体の距離測定装置。An object distance measuring apparatus capable of removing an abnormal distance signal from distance signals between a distance sensor and a plurality of positions of the object, after detecting presence or absence of an abnormality in the distance signal, Is corrected based on the output value at the immediately preceding measurement position, and the correction value or the distance signal value can be output based on the difference between the correction value and the distance signal value. An object distance measuring device.
を演算し、異常な距離信号を検出可能にした請求項１記
載の被検体の距離測定装置。2. The subject distance measuring apparatus according to claim 1, wherein a difference between distance signals at successive measurement positions is calculated to detect an abnormal distance signal.
号の出力値を、直前の測定位置における出力値に補正可
能にした請求項２記載の被検体の距離測定装置。3. The subject distance measuring apparatus according to claim 2, wherein after detecting the abnormal distance signal, an output value of the abnormal distance signal can be corrected to an output value at a measurement position immediately before.
の出力値を、直前の測定位置における出力値に当該変化
量を加算して補正可能にした請求項２記載の被検体の距
離測定装置。4. The subject distance measuring apparatus according to claim 2, wherein after detecting the abnormal distance signal, the output value of the normal distance signal can be corrected by adding the amount of change to the output value at the immediately preceding measurement position. .
定値以内のとき、前記距離信号値を出力可能にした請求
項１記載の被検体の距離測定装置。5. The subject distance measuring apparatus according to claim 1, wherein the distance signal value can be output when a difference between the correction value and the distance signal value is within a predetermined value.
定値以上のとき、前記補正値を出力可能にした請求項１
記載の被検体の距離測定装置。6. The apparatus according to claim 1, wherein when the difference between the correction value and the distance signal value is equal to or greater than a predetermined value, the correction value can be output.
A distance measuring device for a subject according to claim 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001158205A JP3658685B2 (en) | 2001-05-28 | 2001-05-28 | Subject distance measuring device |
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| JP3658685B2 JP3658685B2 (en) | 2005-06-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011141260A (en) * | 2009-12-07 | 2011-07-21 | Kobe Steel Ltd | Device and method for inspecting tyre shape |
| JP2012513029A (en) * | 2008-12-19 | 2012-06-07 | ミシュラン ルシェルシュ エ テクニーク ソシエテ アノニム | Filtering method for improving data quality of geometric tire measurements |
| US8712720B2 (en) | 2008-12-19 | 2014-04-29 | Michelin Recherche at Technigue S.A. | Filtering method for improving the data quality of geometric tire measurements |
| WO2015170749A1 (en) * | 2014-05-09 | 2015-11-12 | 横浜ゴム株式会社 | Tire-trimming device and method |
| US9569563B2 (en) | 2010-06-14 | 2017-02-14 | Michelin Recherche Et Technique S.A. | Method for prediction and control of harmonic components of tire uniformity parameters |
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2001
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012513029A (en) * | 2008-12-19 | 2012-06-07 | ミシュラン ルシェルシュ エ テクニーク ソシエテ アノニム | Filtering method for improving data quality of geometric tire measurements |
| US8712720B2 (en) | 2008-12-19 | 2014-04-29 | Michelin Recherche at Technigue S.A. | Filtering method for improving the data quality of geometric tire measurements |
| JP2011141260A (en) * | 2009-12-07 | 2011-07-21 | Kobe Steel Ltd | Device and method for inspecting tyre shape |
| US9569563B2 (en) | 2010-06-14 | 2017-02-14 | Michelin Recherche Et Technique S.A. | Method for prediction and control of harmonic components of tire uniformity parameters |
| WO2015170749A1 (en) * | 2014-05-09 | 2015-11-12 | 横浜ゴム株式会社 | Tire-trimming device and method |
| JP2015214077A (en) * | 2014-05-09 | 2015-12-03 | 横浜ゴム株式会社 | Trimming device and method for tire |
| US11878482B2 (en) | 2014-05-09 | 2024-01-23 | The Yokohama Rubber Co., Ltd. | Tire-trimming device and method |
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