JP3118118B2 - Surface distortion measurement and analysis system - Google Patents
Surface distortion measurement and analysis systemInfo
- Publication number
- JP3118118B2 JP3118118B2 JP05137500A JP13750093A JP3118118B2 JP 3118118 B2 JP3118118 B2 JP 3118118B2 JP 05137500 A JP05137500 A JP 05137500A JP 13750093 A JP13750093 A JP 13750093A JP 3118118 B2 JP3118118 B2 JP 3118118B2
- Authority
- JP
- Japan
- Prior art keywords
- outer panel
- surface distortion
- sectional shape
- measurement
- cross
- 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
Landscapes
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車ボディを構成す
るプレス成形部品であるアウタパネルの外観面品質の良
否を判定するための面歪測定解析システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface distortion measurement / analysis system for judging the quality of an outer surface of an outer panel which is a press-formed part constituting an automobile body.
【０００２】[0002]
【従来の技術】ドアなどを構成するアウタパネルの面歪
量は、一般的にプレス、溶接、塗装、組立の各工程毎に
変化する。そこで、その面歪量を追跡調査することは、
特に新車種立上がり時において各工程が安定するまでの
間、ボディ品質を管理する上で重要な作業となる。2. Description of the Related Art Generally, the amount of surface distortion of an outer panel constituting a door or the like changes in each process of pressing, welding, painting, and assembling. Therefore, to track the surface distortion,
This is an important task in controlling body quality, especially when each process is stabilized at the start of a new model.
【０００３】従来、面歪量の測定は、先ず接触式の形状
測定機を用いてアウタパネル上を走査することによっ
て、所定間隔で基準位置からのアウタパネル面の高さ方
向の距離を測定する。次に、測定データからプロッタを
介してアウタパネルの断面形状を求める。更に、図６に
示すようにプロッタにより出力された断面形状１００か
ら形状の変化が激しくて、面歪が発生していると思われ
る部分で接線１０１を引き、接線１０１と断面形状１０
０との最大差Δｈを定規で測定し、最大差２６２４Δｈ
を面歪量として扱っていた。そして、その面歪量からア
ウタパネルの外観面品質の良否を判定していた。Conventionally, to measure the amount of surface distortion, a distance in the height direction of the outer panel surface from a reference position is measured at predetermined intervals by first scanning the outer panel using a contact-type shape measuring instrument. Next, the cross-sectional shape of the outer panel is obtained from the measurement data via a plotter. Further, as shown in FIG. 6, a tangent line 101 is drawn at a portion where the shape is greatly changed from the cross-sectional shape 100 output by the plotter and the surface distortion is considered to be generated.
The maximum difference Δh from 0 is measured with a ruler, and the maximum difference 2624 Δh
Was treated as surface distortion. The quality of the outer surface quality of the outer panel was determined based on the surface distortion amount.
【０００４】[0004]
【発明が解決しようとする課題】従来の外観面品質の良
否判定方法では、人間が幾何学的に最大歪部の深さを測
定しないと、面歪量を得ることが出来なかった。従っ
て、データ収集に人間が直接介在する時があるため、測
定データに個人差を含んだり、面品質の良否判定に長時
間要したり、官能検査と相違する場合があったりすると
いう問題点を有していた。In the conventional method of judging the quality of the external appearance surface, the amount of surface distortion cannot be obtained unless a person geometrically measures the depth of the maximum distortion portion. Therefore, since humans may directly intervene in the data collection, the measurement data may include individual differences, it may take a long time to judge the quality of the surface quality, or it may be different from the sensory test. Had.
【０００５】本発明は、従来の技術が有するこのような
問題点に鑑みてなされたものであり、その目的とすると
ころは、測定対象の走査から最大面歪量の解析までを自
動的に処理することのよって、面歪量の精度の良い解析
及び解析時間の大幅な短縮を図ることが出来る面歪測定
解析システムを提供しようとするものである。The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to automatically process from the scanning of a measurement target to the analysis of the maximum surface distortion. Accordingly, an object of the present invention is to provide a surface distortion measurement / analysis system that can accurately analyze the amount of surface distortion and significantly reduce the analysis time.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決すべく本
発明は、パネルの外観面品質の良否を判定するための面
歪測定解析システムにおいて、形状測定機によって得ら
れた前記パネルの各測定点における位置データをコンピ
ュータに記憶し、この位置データから前記パネルの断面
形状を表す曲線を前記コンピュータで演算すると共に、
前記曲線の前記各測定点における２次微係数を算出し、
この２次微係数の最大値と最小値を表示し、その差から
前記パネルの面品質の良否を判定するものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a surface distortion measuring / analyzing system for judging the quality of appearance of a panel. The position data at the point is stored in a computer, and a curve representing the sectional shape of the panel is calculated from the position data by the computer,
Calculating a second derivative at each of the measurement points of the curve;
The maximum value and the minimum value of the secondary differential coefficient are displayed, and the quality of the panel is judged based on the difference.
【０００７】[0007]
【作用】測定機によって得られたパネルの位置データが
記憶されると共に、その位置データからパネルの断面形
状を表す曲線が創成され、この曲線の各測定点における
２次微係数が算出され、この２次微係数の最大値と最小
値からパネルの外観面品質の良否が判定される。The position data of the panel obtained by the measuring instrument is stored, and a curve representing the cross-sectional shape of the panel is created from the position data, and the second derivative at each measurement point of the curve is calculated. From the maximum value and the minimum value of the secondary derivative, the quality of the appearance of the panel is determined.
【０００８】[0008]
【実施例】以下に本発明の実施例を添付図面に基づいて
説明する。図１は本発明に係る面歪測定解析システムの
システム構成図、図２はスポット溶接等により組立られ
たフロントドアの斜視図、図３は本発明に係る面歪測定
解析システムの操作手順を示すフローチャート、図４は
各工程におけるアウタパネルの断面形状を示す図、図５
は本発明に係る面歪測定解析システムの面歪量を表す図
である。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a system configuration diagram of a surface distortion measurement / analysis system according to the present invention, FIG. 2 is a perspective view of a front door assembled by spot welding or the like, and FIG. 3 shows an operation procedure of the surface distortion measurement / analysis system according to the present invention. FIG. 4 is a flowchart showing the cross-sectional shape of the outer panel in each step.
FIG. 3 is a diagram illustrating a surface strain amount of the surface strain measurement analysis system according to the present invention.
【０００９】面歪測定解析システムの構成は、図１に示
すように２次元形状測定機１とノート型パーソナルコン
ピュータ２から成り、インタフェイス（不図示）を介し
て接続されている。As shown in FIG. 1, the configuration of the surface distortion measurement / analysis system comprises a two-dimensional shape measuring instrument 1 and a notebook personal computer 2, which are connected via an interface (not shown).
【００１０】２次元形状測定機１は、高さ方向（Ｚ方
向）の基準位置からアウタパネル３面までの距離を接触
又は非接触で検出する距離検出器４と、走査方向（Ｘ方
向）の基準位置からの変位を検出する位置検出器５を備
えている。各検出器４，５の検出データは、インタフェ
イスを介してパーソナルコンピュータ２に入力され、メ
モリに記憶される。距離検出器４は、Ｘ方向に移動自在
に測定機本体６に設けられており、位置検出器５は距離
検出器４のＸ方向の変位を検出するように測定機本体６
に設けられている。The two-dimensional shape measuring device 1 includes a distance detector 4 for detecting a distance from a reference position in a height direction (Z direction) to a surface of the outer panel 3 in a contact or non-contact manner, and a reference in a scanning direction (X direction). A position detector 5 for detecting a displacement from a position is provided. The detection data of each of the detectors 4 and 5 is input to the personal computer 2 via the interface and stored in the memory. The distance detector 4 is provided on the measuring device main body 6 so as to be movable in the X direction, and the position detector 5 is configured to detect displacement of the distance detector 4 in the X direction.
It is provided in.
【００１１】例えば、スポット溶接等により組立られた
図２に示すようなフロントドア７のアウタパネル３の断
面形状と面歪量を測定するには、先ず測定台（不図示）
にフロントドア７をセットする。次に、非接触式の２次
元形状測定機１の距離検出器４がアウタパネル３の測定
したい断面形状を走査することが出来るよう、即ち測定
したい断面形状に測定機１のＸ方向が一致するように測
定機１を測定台又はアウタパネル３上にセットする。For example, to measure the cross-sectional shape and the amount of surface distortion of the outer panel 3 of the front door 7 as shown in FIG. 2 assembled by spot welding or the like, first, a measuring table (not shown)
Set the front door 7 at Next, the distance detector 4 of the non-contact type two-dimensional shape measuring device 1 can scan the cross-sectional shape of the outer panel 3 to be measured, that is, the X direction of the measuring device 1 matches the cross-sectional shape to be measured. Is set on the measuring table or the outer panel 3.
【００１２】そして、アウタパネル３の面歪測定解析
は、図３に示すように、測定距離（Ｘ方向）やスムージ
ングポイント数などの測定条件設定（Ｓ１）、測定実行
（Ｓ２）、測定機１からパーソナルコンピュータ２に位
置データ入力（Ｓ３）、断面形状の曲線や２次微係数な
どの演算処理（Ｓ４）、断面形状や２次微係数の最大値
と最小値などの演算結果を表示部８に表示（Ｓ５）、な
どの操作手順で行われる。以下にその内容を説明する。As shown in FIG. 3, the surface distortion measurement analysis of the outer panel 3 is performed by setting measurement conditions such as a measurement distance (X direction) and the number of smoothing points (S1), executing a measurement (S2), and performing measurement from the measuring machine 1. The position data is input to the personal computer 2 (S3), the calculation processing such as the curve of the sectional shape and the second derivative is performed (S4), and the calculation results such as the maximum value and the minimum value of the sectional shape and the second derivative are displayed on the display unit 8. The display is performed according to an operation procedure such as display (S5). The details will be described below.
【００１３】先ず、測定機１の距離検出器４を移動して
アウタパネル３の基準点Ｐ0に位置決めする。更に、距
離検出器４を基準点Ｐ0から走査方向（Ｘ方向）に動か
してアウタパネル３を走査し、距離検出器４により基準
点Ｐ0から所定間隔で設定したアウタパネル３の測定点
Ｐ1，Ｐ2，Ｐ3…，Ｐnの高さ方向（Ｚ方向）の距離を測
定する。そして、測定点Ｐ1，Ｐ2，Ｐ3…，ＰnのＸ方向
とＺ方向の位置データ｛（Ｘ1，Ｚ1），（Ｘ2，Ｚ2），
（Ｘ3，Ｚ3）…，（Ｘn，Ｚn）｝をインタフェイスを介
してパーソナルコンピュータ２に入力し、記憶する。First, the distance detector 4 of the measuring device 1 is moved and positioned at the reference point P0 of the outer panel 3. Further, the outer panel 3 is scanned by moving the distance detector 4 from the reference point P0 in the scanning direction (X direction), and the measurement points P1, P2, P3 of the outer panel 3 set at predetermined intervals from the reference point P0 by the distance detector 4 .., The distance in the height direction (Z direction) of Pn is measured. Then, the position data ｛(X1, Z1), (X2, Z2), of the measurement points P1, P2, P3,.
(X3, Z3)..., (Xn, Zn)} are input to the personal computer 2 via the interface and stored.
【００１４】パーソナルコンピュータ２に記憶した生の
位置データ｛（Ｘ1，Ｚ1），（Ｘ2，Ｚ2），（Ｘ3，Ｚ
3）…，（Ｘn，Ｚn）｝のままでは、アウタパネル３の
断面形状を認識し難いため補正する。また、補正した位
置データ｛（Ｘ1，Ｚ1），（Ｘ2，Ｚ2），（Ｘ3，Ｚ3）
…，（Ｘn，Ｚn）｝のままでは、ポイントしか表さない
ので凹凸状になり、面歪の発生の有無が判り難い。Raw position data ｛(X1, Z1), (X2, Z2), (X3, Z) stored in the personal computer 2.
3) If (Xn, Zn)} is left as it is, it is difficult to recognize the cross-sectional shape of the outer panel 3 so that correction is made. Further, the corrected position data {(X1, Z1), (X2, Z2), (X3, Z3)
.., (Xn, Zn)}, since only points are represented, the surface becomes uneven, making it difficult to determine whether or not surface distortion has occurred.
【００１５】そこで、ポイントデータを平滑化して曲線
化するために、各測定データ間を補間してスムージング
処理する演算を行い、図４に示すようなフロントドア７
を組立てた後のアウタパネル３の断面形状の曲線１０W
を求める。また、断面形状を示す曲線１０Wが表示部８
に表示される。Therefore, in order to smooth the point data into a curve, a calculation for interpolating between the respective measurement data and performing a smoothing process is performed, and the front door 7 shown in FIG.
Of the cross-sectional shape of the outer panel 3 after assembling
Ask for. The curve 10W indicating the cross-sectional shape is displayed on the display unit 8.
Will be displayed.
【００１６】次に、曲線１０Wの測定点Ｐ1，Ｐ2，Ｐ3
…，Ｐnにおける２次微係数が算出され、それらの２次
微係数をプロットした図５に示すような２次微係数プロ
フィール１２が、パーソナルコンピュータ２の表示部８
に表示される。更に、２次微係数の最大値と最小値の差
ΔＺが算出され、表示部８に表示される。Next, the measurement points P1, P2, P3 of the curve 10W
, Pn are calculated, and a secondary derivative profile 12 as shown in FIG. 5 in which the secondary derivatives are plotted is displayed on the display unit 8 of the personal computer 2.
Will be displayed. Further, a difference ΔZ between the maximum value and the minimum value of the second derivative is calculated and displayed on the display unit 8.
【００１７】そして、２次微係数プロフィール１２の最
大値と最小値の差ΔＺが、面歪の評価基準として扱わ
れ、それによりスポット溶接等により組立られたフロン
トドア７を構成するアウタパネル３の外観面品質の良否
が判定される。The difference ΔZ between the maximum value and the minimum value of the second derivative profile 12 is treated as an evaluation criterion for the surface distortion, whereby the appearance of the outer panel 3 constituting the front door 7 assembled by spot welding or the like. The quality of the surface quality is determined.
【００１８】以上のような手順で、プレス工程における
薄鋼板からプレス成形後のフロントドア７を構成するア
ウタパネル３単体の断面形状と面歪量、溶接工程におけ
るスポット溶接等によりフロントドア７を組立てた後の
アウタパネル３の断面形状と面歪量、塗装工程における
化成処理や塗装を施した後のフロントドア７を構成する
アウタパネル３の断面形状と面歪量、組立工程における
フロントドア７に窓ガラスやその他の部品を取付けた後
のアウタパネル３の断面形状と面歪量が、夫々パーソナ
ルコンピュータ２に記憶される。According to the above procedure, the front door 7 is assembled by the cross-sectional shape and the amount of surface distortion of the outer panel 3 constituting the front door 7 after the press forming from the thin steel plate in the pressing step, the spot welding in the welding step, and the like. The cross-sectional shape and surface distortion amount of the outer panel 3 after, the cross-sectional shape and surface distortion amount of the outer panel 3 constituting the front door 7 after the chemical conversion treatment and coating in the painting process, the window glass and the like on the front door 7 in the assembling process. The cross-sectional shape and the amount of surface distortion of the outer panel 3 after attaching other components are stored in the personal computer 2 respectively.
【００１９】そして、図４に示すように各工程の断面形
状１０P，１０W，１０T，１０Aを同時に表示部８に表示
することによって、各工程の断面形状１０P，１０W，１
０T，１０Aの変化を比較することが容易に出来る。な
お、１０Pはプレス成形後のフロントドア７を構成する
アウタパネル３単体の断面形状、１０Wは前記の通りフ
ロントドア７を組立てた後のアウタパネル３の断面形
状、１０Tは化成処理や塗装を施した後のフロントドア
７を構成するアウタパネル３の断面形状、１０Aはフロ
ントドア７に窓ガラスやその他の部品を取付けた後のア
ウタパネル３の断面形状である。Then, as shown in FIG. 4, the sectional shapes 10P, 10W, 10T, and 10A of the respective steps are simultaneously displayed on the display unit 8, thereby forming the sectional shapes 10P, 10W, and 1 of the respective steps.
It is easy to compare the changes of 0T and 10A. In addition, 10P is the cross-sectional shape of the outer panel 3 alone forming the front door 7 after press molding, 10W is the cross-sectional shape of the outer panel 3 after assembling the front door 7 as described above, and 10T is after forming treatment or painting. Is a cross-sectional shape of the outer panel 3 constituting the front door 7, and 10A is a cross-sectional shape of the outer panel 3 after the window glass and other parts are attached to the front door 7.
【００２０】また、プレス工程においては、特に金型の
補修に際し、金型の成形面とプレス成形されたアウタパ
ネル３の面品質の相関関係が容易に判断出来るので、金
型の補修によるアウタパネル３への影響を検討する上
で、アウタパネル３の断面形状と面歪量が有効な判断資
料となる。In the pressing step, particularly when repairing a mold, the correlation between the molding surface of the mold and the surface quality of the press-molded outer panel 3 can be easily determined. In examining the effect of the above, the cross-sectional shape and the amount of surface distortion of the outer panel 3 are effective judgment data.
【００２１】なお、パーソナルコンピュータ２に記憶し
た測定データを、プロッタによって出力することも出来
る。また、測定データはフロッピーディスクに保存する
ことが出来る。The measurement data stored in the personal computer 2 can be output by a plotter. Also, the measurement data can be stored on a floppy disk.
【００２２】本実施例では、２次元形状測定機１でアウ
タパネル３のある断面形状の位置データ（Ｘ，Ｚ）を収
集したが、３次元形状測定機でアウタパネル３の３次元
の位置データ（Ｘ，Ｙ，Ｚ）を収集し、アウタパネル３
の曲面を表示部に立体的に表示すると共に、任意に所望
の断面形状の曲線をコンピュータで創成し、２次微係数
の最大値と最小値の差でアウタパネル３の外観面品質の
良否を判定することも出来る。In this embodiment, the position data (X, Z) of a certain cross-sectional shape of the outer panel 3 is collected by the two-dimensional shape measuring machine 1, but the three-dimensional position data (X, Z) of the outer panel 3 is collected by the three-dimensional shape measuring device. , Y, Z), and collects the outer panel 3
Is displayed three-dimensionally on the display unit, a curve having a desired cross-sectional shape is arbitrarily created by a computer, and the quality of the outer surface quality of the outer panel 3 is determined based on a difference between the maximum value and the minimum value of the second derivative. You can do it.
【００２３】[0023]
【発明の効果】以上説明したように本発明によれば、各
工程毎のパネルの断面形状と面歪量の比較が容易に出来
る。また、面歪の評価基準を歪部の最大深さから、断面
形状を表す曲線の２次微係数の最大値と最小値の差にし
たことによって、自動的に計算することが出来る。ま
た、面歪を断面形状を表す曲線の２次微係数の最大値と
最小値の差によって評価することで、パネルの基本形状
差により発生する官能検査との違いが生じない。As described above, according to the present invention, it is possible to easily compare the sectional shape and the surface distortion of the panel in each process. Further, the evaluation can be automatically performed by setting the evaluation criterion of the surface strain to the difference between the maximum value and the minimum value of the second derivative of the curve representing the cross-sectional shape from the maximum depth of the strained portion. In addition, by evaluating the surface distortion by the difference between the maximum value and the minimum value of the second derivative of the curve representing the cross-sectional shape, there is no difference from the sensory test caused by the difference in the basic shape of the panel.
【図１】本発明に係る面歪測定解析システムのシステム
構成図FIG. 1 is a system configuration diagram of a surface strain measurement analysis system according to the present invention.
【図２】スポット溶接等により組立られたフロントドア
の斜視図FIG. 2 is a perspective view of a front door assembled by spot welding or the like.
【図３】本発明に係る面歪測定解析システムの操作手順
を示すフローチャートFIG. 3 is a flowchart showing an operation procedure of the surface distortion measurement analysis system according to the present invention.
【図４】各工程におけるアウタパネルの断面形状を示す
図FIG. 4 is a view showing a cross-sectional shape of an outer panel in each step.
【図５】本発明に係る面歪測定解析システムの面歪量を
表す図FIG. 5 is a diagram showing a surface distortion amount of the surface distortion measurement / analysis system according to the present invention.
【図６】従来の面歪量を表す図FIG. 6 is a diagram showing a conventional surface distortion amount.
１…２次元形状測定機（形状測定機）、２…ノート型パ
ーソナルコンピュータ（コンピュータ）、３…アウタパ
ネル（パネル）、４…距離検出器、５…位置検出器、８
…表示部、１０P，１０W，１０T，１０A…各工程におけ
るアウタパネルの断面形状を表す曲線、１２…２次微係
数プロフィール、Ｐ1，Ｐ2，Ｐ3…，Ｐn…測定点、（Ｘ
1，Ｚ1），（Ｘ2，Ｚ2），（Ｘ3，Ｚ3）…，（Ｘn，Ｚ
n）…位置データ、ΔＺ…２次微係数の最大値と最小値
の差。DESCRIPTION OF SYMBOLS 1 ... Two-dimensional shape measuring machine (shape measuring machine), 2 ... Laptop type personal computer (computer), 3 ... Outer panel (panel), 4 ... Distance detector, 5 ... Position detector, 8
.., Display section, 10P, 10W, 10T, 10A... Curves representing the cross-sectional shape of the outer panel in each step, 12... Second order derivative coefficient profiles, P1, P2, P3.
1, Z1), (X2, Z2), (X3, Z3) ..., (Xn, Z
n)... position data, ΔZ... difference between maximum and minimum values of second derivative.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−142312（ＪＰ，Ａ) 特開 昭54−49965（ＪＰ，Ａ) 特開 昭60−196608（ＪＰ，Ａ) 特開 平６−34362（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01B 21/00 - 21/32 G01B 11/00 - 11/30 102 G01N 21/84 - 21/958 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-142212 (JP, A) JP-A-54-49965 (JP, A) JP-A-60-196608 (JP, A) JP-A-6-196608 34362 (JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) G01B 21/00-21/32 G01B 11/00-11/30 102 G01N 21/84-21/958
Claims (1)
めの面歪測定解析システムにおいて、形状測定機によっ
て得られた前記パネルの各測定点における位置データを
コンピュータに記憶し、この位置データから前記パネル
の断面形状を表す曲線を前記コンピュータで演算すると
共に、前記曲線の前記各測定点における２次微係数を算
出し、この２次微係数の最大値と最小値を表示し、その
差から前記パネルの面品質の良否を判定することを特徴
とする面歪測定解析システム。1. A surface distortion measurement and analysis system for judging the quality of an external appearance surface of a panel, wherein position data at each measurement point of the panel obtained by a shape measuring machine is stored in a computer, and the position data is obtained from the position data. The computer calculates a curve representing the cross-sectional shape of the panel with the computer, calculates a second derivative at each of the measurement points of the curve, displays the maximum value and the minimum value of the second derivative, and calculates A surface distortion measurement / analysis system, wherein quality of the surface quality of the panel is determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05137500A JP3118118B2 (en) | 1993-06-08 | 1993-06-08 | Surface distortion measurement and analysis system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05137500A JP3118118B2 (en) | 1993-06-08 | 1993-06-08 | Surface distortion measurement and analysis system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06347254A JPH06347254A (en) | 1994-12-20 |
| JP3118118B2 true JP3118118B2 (en) | 2000-12-18 |
Family
ID=15200119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05137500A Expired - Fee Related JP3118118B2 (en) | 1993-06-08 | 1993-06-08 | Surface distortion measurement and analysis system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3118118B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7226090B2 (en) * | 2019-05-22 | 2023-02-21 | 日本製鉄株式会社 | SURFACE PROFILE EVALUATION METHOD, PROGRAM, RECORDING MEDIUM, AND SURFACE PROFILE EVALUATION DEVICE |
-
1993
- 1993-06-08 JP JP05137500A patent/JP3118118B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06347254A (en) | 1994-12-20 |
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