JPS61233306A - Method for measuring extent of eccentricity - Google Patents

Method for measuring extent of eccentricity

Info

Publication number
JPS61233306A
JPS61233306A JP7484385A JP7484385A JPS61233306A JP S61233306 A JPS61233306 A JP S61233306A JP 7484385 A JP7484385 A JP 7484385A JP 7484385 A JP7484385 A JP 7484385A JP S61233306 A JPS61233306 A JP S61233306A
Authority
JP
Japan
Prior art keywords
coordinates
inner circumference
inner circle
center
area
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.)
Pending
Application number
JP7484385A
Other languages
Japanese (ja)
Inventor
Yukio Tomizawa
富沢 幸雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP7484385A priority Critical patent/JPS61233306A/en
Publication of JPS61233306A publication Critical patent/JPS61233306A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/26Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
    • G01B11/27Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
    • G01B11/272Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes using photoelectric detection means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

PURPOSE:To improve the measurement precision and to shorten the measuring time by scanning an information area on X and Y axes to pick up images of coordinates of three points on the first inner circle and those on the second inner circle of the information area and subjecting binarization signals obtained in this manner to the pattern processing. CONSTITUTION:XY coordinates on the boundary line between logical '0' and logical '1' of the video signal obtained by scanning an area including the first inner circle of an information disc 1 on the XP plane with a photoelectric conversion means are detected. The intersection between perpendicular bisectors of two chords connecting coordinates of two points out of coordinates of three points on the inner circle 2 is defined as center coordinates of the inner circle, and XY coordinates on the boundary line between logical '0' and logical '1' of the binarization signal of the video signal obtained by scanning an area including the second inner circle 4 of the disc 1 on the XP plane are detected. The intersection between perpendicular bisectors of two chords connecting coordinates of two points out of coordinates of three points on the inner circle 4 is defined as center coordinates of the inner circle 4, and center coordinates of the inner circle 4 are subtracted from those of the inner circle 2 to obtain an extent of eccentricity of an information area 3 on the disc 1.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は偏心量測定方法、さらに詳しく言えば情報円盤
情報領域の偏心量測定方法に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for measuring eccentricity, and more specifically, to a method for measuring eccentricity of an information area of an information disk.

〔従来の技術〕[Conventional technology]

従来の偏心量測定装置は、第8図に示すように情報円盤
1を固定したXYテーブル10と、前記情報円盤lを作
業者30が目視するための顕微鏡3)と、前記顕微[3
)の光軸に反射ミ2−とプリズムを介して挿入された、
基準の十字カーソル発生手段32と、前記XYテーブル
10から出力され次X移動量座標信号aとY移動量座標
信号すとからXYテーブル100XY座標を検出し表示
する座標カウンタ33とを含んで構成される。
The conventional eccentricity measuring device, as shown in FIG.
) was inserted into the optical axis of the reflector through a prism.
The cursor generating means 32 includes a reference cross cursor generating means 32, and a coordinate counter 33 that detects and displays the XY coordinates of the XY table 100 from the next X movement amount coordinate signal a and the Y movement amount coordinate signal output from the XY table 10. Ru.

たとえばXYテーブル10を作業者30が顕微@3)を
目視しながらXYテーブル10t−移動することにより
、前記情報円盤lの外周5と、前記十字カーソルの中心
との2接点のXX座標1&:XX座標カウンタ33から
検出し、この2接点の二つのX座標を加算して数値2で
除すことによシ得られる座標を外周5の中心のX座標と
し、前記2接点の二つのX座標を加算して数値2で除す
ことによル得られる座標を外周5の中心のX座標とする
ことにより、前記情報円盤1の外周5の中心座標を検出
し、つぎにXYテーブル10t−たとえばX方向に移動
することにより前記情報円盤1上の情報領域3の内周4
と前記基準の十字カーソルの中心との2接点のXY座標
’(i−XX座標カウンタ33によシ検出し、前記2W
j、点の二つのX座標を加算して数値2で除すことによ
り得られる座標上内周4の中心のXWk標とし、前記2
接点の二つのX座標を加算して数値2で除すことによシ
得られるY座標上内周4の中心のX座標とすることKよ
り、前記情報領域3の内周4の中心座標とし、前記情報
円盤1の外周5の中心座標から前記情報領域3の内周4
の中心座it減算した数値tもって、情報円盤1の情報
領域3の偏心量としていた。
For example, when the operator 30 moves the XY table 10t while visually observing the microscope @3), the XX coordinates 1&:XX of the two points of contact between the outer circumference 5 of the information disk l and the center of the cross cursor The coordinates detected from the coordinate counter 33 and obtained by adding the two X coordinates of these two contact points and dividing by the numerical value 2 are set as the X coordinate of the center of the outer periphery 5, and the two X coordinates of the two contact points are The center coordinates of the outer periphery 5 of the information disk 1 are detected by using the coordinates obtained by adding and dividing by the numerical value 2 as the X coordinates of the center of the outer periphery 5, and then the XY table 10t - for example, By moving in the direction, the inner circumference 4 of the information area 3 on the information disk 1
and the center of the reference cross cursor (detected by the i-XX coordinate counter 33,
j, the XWk mark of the center of the inner circumference 4 on the coordinate obtained by adding the two X coordinates of the point and dividing by the numerical value 2, and the above 2
Let the X coordinate of the center of the inner circumference 4 be the Y coordinate obtained by adding the two X coordinates of the contact points and divide by the value 2. From K, let the center coordinate of the inner circumference 4 of the information area 3 be the , from the center coordinates of the outer circumference 5 of the information disk 1 to the inner circumference 4 of the information area 3
The eccentricity of the information area 3 of the information disk 1 was determined by subtracting the center position it from the value t.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述した従来の偏心量測定方法は作業者が顕微at−用
いて、基準の十字カーソルの中心か情報円盤の外周と接
する2接点の座標から情報円盤の外周の中心座標を計算
し、つぎに前記十字カーソルの中心が情報領域の内周と
接する2接点の座標から情報領域の内周の中心座標を計
算し、前記情報円盤の外周の中心座標と前記情報領域の
内周の中心座標とから偏心量を計算する方法となってい
るので作業者によるバラツキや、作業者による位置合わ
せ等による測定誤差がロシ、さらに測定時間がかかると
埴う欠点がめった。
In the conventional eccentricity measurement method described above, an operator uses a microscope to calculate the center coordinates of the outer periphery of the information disk from the coordinates of the center of the reference cross cursor or two contact points that touch the outer periphery of the information disk, and then The center coordinates of the inner circumference of the information area are calculated from the coordinates of two points of contact where the center of the cross cursor touches the inner circumference of the information area, and the eccentricity is calculated from the center coordinates of the outer circumference of the information disk and the center coordinates of the inner circumference of the information area. Since this method calculates the amount, there are many problems with measurement errors due to variations among workers and positioning by workers, and furthermore, it takes a long time to measure.

〔問題点を解決する危めの手段〕[Dangerous means to solve the problem]

本発明の偏心量測定方法は。 The eccentricity measurement method of the present invention is as follows.

XY平面上の情報円盤1cI第1の円周2を含む領域を
光電変換手段によシxy平面上で走査して得られる映像
信号の2値化信号の論理“0#と論理“l″との境界線
上のxy@標を検出し、XY平面上の座標に変換して得
られる前記W!、1の内周2上の三点の座標のうち二点
の座標を用いて結べる、二つの弦の垂直二等分線の交点
を前記1!1の内周2の中心座標とし、さらに前記XY
平面上の情報円盤1の情報領域3の第2の内周4を含む
領域を光電変換手段によF)xy平面上で走査して得ら
れる映像信号の2値化信号の論理10”と論理″′1”
との境界線上のxyX座標検出し、XY平面上の座標に
変換して得られる前記第2の内周4上の三点の座標のう
ち二点の座標を用いて結べる、二つの弦の垂直二等分線
の交点を前記第2の内周4の中心座標とすることにより
、前記第1の内周2の中心座標から前記第2の内周4の
中心座標を減算することにより情報円盤1の情報領域3
の偏心量とすること全特徴とする。
The logic "0#" and the logic "l" of the binary signal of the video signal obtained by scanning the area including the first circumference 2 of the information disk 1cI on the XY plane with a photoelectric conversion means on the xy plane. Detecting the xy@ mark on the boundary line and converting it to the coordinates on the XY plane, the two points can be connected using the coordinates of two points on the inner circumference 2 of W! Let the intersection of the perpendicular bisectors of the chord be the center coordinates of the inner circumference 2 of the above 1!1, and further the above XY
Logic 10'' of the binary signal of the video signal obtained by scanning the area including the second inner circumference 4 of the information area 3 of the information disk 1 on the plane using photoelectric conversion means on the F) xy plane. ″′1”
The perpendicular of the two strings that can be connected using the coordinates of two of the three points on the second inner circumference 4 obtained by detecting the xyX coordinates on the boundary line and converting them to coordinates on the XY plane. By setting the intersection of the bisectors as the center coordinates of the second inner circumference 4, the center coordinates of the second inner circumference 4 are subtracted from the center coordinates of the first inner circumference 2. 1 information area 3
All characteristics shall be the amount of eccentricity.

〔実施例〕〔Example〕

次に、本発明の実施例について、図面上参照して詳細に
説明する。
Next, embodiments of the present invention will be described in detail with reference to the drawings.

以下第1−〜第7図に従って不発明に使用する方法を説
明する。
The method used in the invention will be described below with reference to FIGS. 1 to 7.

第1図は情報円盤1のXYテーブル上のXX座標軸と光
電変換手段による撮偉領域との関係を示す−であり情報
円盤lはXX座標上の第1象現にめ夛、XX座標の原点
t−Oとする。
Figure 1 shows the relationship between the XX coordinate axes on the XY table of the information disk 1 and the area photographed by the photoelectric conversion means. -O.

情報円盤1の第1の内周2を含む三領域は領域20〜2
2でアシ、情報領域3の第2の内周を含む三領域は領域
23〜25である。
The three areas including the first inner periphery 2 of the information disk 1 are areas 20 to 2.
The three areas including the second inner periphery of the information area 3 are areas 23 to 25.

第2図はXYテーブルt−XY輪軸上移動し前記領域2
0〜22t−光電変換手段によシ撮像しxy軸で走査し
たときのXY軸とxy軸との関係を示す図で1)前記光
電変換手段で走査したときのX方向の分解能tmsy方
向の分解能inとし走査領域20の原点t” 01 #
走査領域21の原点を02゜走査領域22の原点t−0
3とすると前記原点01はXY軸では座標(XtsYt
)’となり、原点02は座標(X2 a Y2 )とな
シ、P;L点03 /I′i(X3 、Y3)となる。
Figure 2 shows the area 2 of the XY table moved on the t-XY wheel axis.
0 to 22t - A diagram showing the relationship between the XY axes and the xy axes when an image is captured by the photoelectric conversion means and scanned in the xy axes. 1) Resolution in the X direction and resolution in the tmsy direction when scanned by the photoelectric conversion means. The origin of the scanning area 20 is t” 01 #
The origin of the scanning area 21 is 02°, the origin of the scanning area 22 is t-0
3, the origin 01 is the coordinate (XtsYt
)', and the origin 02 has the coordinates (X2 a Y2 ), P; L point 03 /I'i (X3, Y3).

ここで走査領域20における第1の内周2上の座標は(
xt*y1)@走査軸域21における第1の内周2上の
座標h (X2 s yz ) *走査領域22におけ
る第1の内周2上の座標&!(Xs、Ya)である。
Here, the coordinates on the first inner circumference 2 in the scanning area 20 are (
xt*y1) @Coordinate h (X2 s yz) on the first inner circumference 2 in the scanning axis area 21 *Coordinate on the first inner circumference 2 in the scanning area 22 &! (Xs, Ya).

第3図は前記領域20t−光電変換手段で撮像し走査し
たときのX方向のサンプリング数を256ビ、トとし、
y方向のサンプリングライン全256上で (X1+nxl 、Yt+m(256−yl ))とな
る。ここでX1o=Xl+nx1.Y1o=Y1+m(
256)’t)  とすることにより前記座標(xl、
yl)はXY[i標上で (Xlo * YIO) となる。つぎにXYテーブル2XY軸上で座標(X2 
p Yz )に移動し、前記領域21を光電変換手段で
走査し、2値化したときの論理@l#と論理″0”との
境界線上の座標(x2.y2)とすると、この座標はX
Y軸上で (X2+nx2.Yz−)−m(25672))トfk
 ルa ココテX1) =X2 + n x2 、 Y
 1) =Y2 +m(256Yz)とすることにより
前記座標(x2゜yz)はXY座標上で (Xll e Yll ) となる。つぎにXYテーブルtkXY軸上で座標(Xs
、Ya)VC移動し、前記領域22を光電変換手段によ
り走査し、2値化し几ときの論理@0”と論理@1#と
の境界線上の座標t−(xa、ys)とすると、この座
1m(xa、ys)HXY座軸上で(X3+nx3 、
Y3+m(256)’s ) )となる。ここでX12
=X3+nx3.Y□2=Y3+m(256−Ya) 
 とすることKよシ前記座標(xa。
FIG. 3 shows the area 20t - the number of samplings in the X direction when imaged and scanned by the photoelectric conversion means is 256 bits,
(X1+nxl, Yt+m(256-yl)) on all 256 sampling lines in the y direction. Here, X1o=Xl+nx1. Y1o=Y1+m(
256)'t) By setting the coordinates (xl,
yl) becomes (Xlo * YIO) at XY[i standard. Next, set the coordinates (X2
p Yz ), scan the area 21 with a photoelectric conversion means, and take the coordinates (x2.y2) on the boundary line between logic @l# and logic "0" when binarized, then these coordinates are X
On the Y axis (X2+nx2.Yz-)-m(25672)) fk
Rua KokoteX1) =X2 + n x2, Y
1) By setting =Y2 +m(256Yz), the coordinates (x2°yz) become (Xll e Yll) on the XY coordinates. Next, coordinates (Xs
, Ya) VC is moved, the area 22 is scanned by the photoelectric conversion means, and the area 22 is binarized. Assuming that the coordinates t-(xa, ys) are on the boundary line between logic @0'' and logic @1#, then this On the seat 1m (xa, ys) HXY seat axis (X3+nx3,
Y3+m(256)'s)). Here X12
=X3+nx3. Y□2=Y3+m(256-Ya)
Let K be the coordinates (xa.

ys)はXY座標上で (X12 t Y12 ) となる。したかって前記情報円盤lの第1内周2上の三
つの座標(XIO* Ylo ) # (Xll s 
Ytl) #(X12 e Y12 )が検出される。
ys) becomes (X12 t Y12 ) on the XY coordinates. Therefore, three coordinates (XIO*Ylo) #(Xlls
Ytl) #(X12 e Y12) is detected.

第4@はXYテーブルt−XY軸上で移動し前記領域2
3〜25を光電変換手段によシ撒像しxy軸で走査した
ときのXY軸とxy軸との関係を示す図であり前記光電
変換手段で走査したときのX方向の分解能′Ikmty
方向の分解能′frnとし走査領域23の原点t−o4
j走査領域24の原点を05゜走査領域25の原点を0
6とすると前記原点04はXY軸では座標(X4 # 
Y4 )となシ、原点05は座標(Xs e Ys )
となシ、原点06は(Xs、Ys)となる。ここで走査
領域23における第2の内周4上の座標は(x4#Y4
)#走査領域24における第2の内周4上の座標は(X
5mY5)s走査領域25における$2の内周4上の座
標は(xs、y6)である0 第5図は前記領域23を光電変換手段で撮像し走査した
ときのX方向のサンプリング数t″256ビ、トとし、
y方向のサンプリングラインを256ラインとすると2
値化したときの論理1)”と論理10”との境界線上の
座標は(x4) y4 )でるり、この座IIC!4.
74)はXY座標上で(X4 +nx4 、 Y4 +
m(2563’4 ) )となる。ここでX2G =X
4 +n X4 、 Y2o=Y 4 +m(256y
4)  とすることにより前記座標(xs。
The fourth @ moves on the XY table t-XY axis and the area 2
3 to 25 are imaged by a photoelectric conversion means and scanned in the xy axes, and the relationship between the XY axes and the xy axis is shown.
The resolution in the direction 'frn is the origin of the scanning area 23 t-o4
j Set the origin of the scanning area 24 to 05°; set the origin of the scanning area 25 to 0
6, the origin 04 is the coordinate (X4 #
Y4), the origin 05 is the coordinates (Xs e Ys)
The origin 06 is (Xs, Ys). Here, the coordinates on the second inner circumference 4 in the scanning area 23 are (x4#Y4
)# The coordinates on the second inner circumference 4 in the scanning area 24 are (X
5mY5)s The coordinates of $2 on the inner circumference 4 in the scanning area 25 are (xs, y6) 0 Figure 5 shows the sampling number t'' in the X direction when the area 23 is imaged and scanned by the photoelectric conversion means. 256 bits, Totoshi,
If the sampling line in the y direction is 256 lines, then 2
The coordinates on the boundary line between logic 1)" and logic 10" when converted into values are (x4) y4), and this locus IIC! 4.
74) is on the XY coordinates (X4 + nx4 , Y4 +
m(2563'4)). Here X2G =X
4 +n X4, Y2o=Y4 +m(256y
4) The coordinates (xs.

Ys)  は、XY座標上で (Xzo・Y2O) となる。つぎにXYテーブルをXY軸上で座標(Xs 
m Ys )に移動し、前記領域24を光電変換手段で
走査し、2値化したときの論理@1#と論理@Omとの
境界線上の座標(xs*ys)とすると、この座標はX
Y軸上で (X5+nx5 e Ys+m(256−75) )と
なる。ここでX21 =X5 ” ” ”5 * Y2
1 =Y5 +m(256−ys )  とすることに
より前記座91(xs。
Ys) becomes (Xzo・Y2O) on the XY coordinates. Next, coordinate the XY table on the XY axes (Xs
m Ys ), scan the area 24 with a photoelectric conversion means, and take the coordinates (xs*ys) on the boundary line between logic @1# and logic @Om when binarized, then this coordinate is
On the Y axis, it becomes (X5+nx5 e Ys+m(256-75)). Here, X21 = X5 ” ” 5 * Y2
1 = Y5 + m (256-ys), the seat 91 (xs).

ys )はXY座標上で (X21 s Y21 ) となる。つぎにXYテーブルをXY軸上で座標(X6#
Y6)に移動し、前記領域25を光電変換手段によシ走
査し、、2fik化したときの論理@0”と論理“1#
との境界線上の座1)’t(xi、ys)とすると、こ
の座標(Xs m 76 )はXY座軸上で(’Xs 
+nxe 、 Ys +m(25s −ys ) )と
なる。ここでX22=X6−1−nx6#Yz2=Y6
+m(25676)  とすることにより前記座標(x
s。
ys ) becomes (X21 s Y21 ) on the XY coordinates. Next, coordinate the XY table on the XY axes (X6#
Y6), the area 25 is scanned by the photoelectric conversion means, and the logic @0" and the logic "1#" are obtained when the area 25 is converted into 2fik.
If the locus 1)'t(xi, ys) is on the boundary line with
+nxe, Ys +m(25s -ys)). Here, X22=X6-1-nx6#Yz2=Y6
+m (25676), the coordinate (x
s.

ys)はXY座標上で (X42 e X22 ) となる。したがって前記情報領域3の第2の内周4上の
三ツノ座13!(X20 e Yzo ) a (X2
1 # X21 )。
ys) becomes (X42 e X22 ) on the XY coordinates. Therefore, the triangular constellation 13 on the second inner circumference 4 of the information area 3! (X20 e Yzo) a (X2
1 #X21).

(Xz□5Y22)が検出される。(Xz□5Y22) is detected.

第6図は前記方法により検出された情報円盤1の第1の
内周z上の三点の座1lll(”1o s Yto )
 5(Xu 5Yll)* (X12eYxz)から前
記第1の内周2の中心座標を検出する方法管示している
FIG. 6 shows the three points 1llll ("1os Yto) on the first inner circumference z of the information disk 1 detected by the method described above.
5(Xu 5Yll)*(X12eYxz) shows a method for detecting the center coordinates of the first inner circumference 2.

ここでl!1の内周2の中心座標t (X too *
 Ytoo)とする。
Here l! The center coordinate t of the inner circumference 2 of 1 (X too *
Ytoo).

前記三点の座標のうち座標(Xlo * Yto )と
座標(Xll e Ytt )とを結んで弦t1とし、
座標(X1) #Yo)と座標(Xxz t Yt2)
とを結んで弦t2とすると、円の二つの弦の垂直二等分
線の交点は円の中心となることから第1の円周2の中心
座標(X100 e Ytoo )が求まることになる
Among the coordinates of the three points, coordinates (Xlo * Yto) and (Xlle Ytt) are connected to form a chord t1,
Coordinates (X1) #Yo) and coordinates (Xxz t Yt2)
If we connect them to form the chord t2, the intersection of the perpendicular bisectors of the two chords of the circle is the center of the circle, so the center coordinates (X100 e Ytoo) of the first circumference 2 can be found.

弦t1は傾き(Xlo−Xlt )/(YIO−Yll
 )の直線であり、この弦t1と直交する垂直二等分線
t1は傾き−(YIOYll)/(XIO−Xll)で
座標((Xto+Xtt )/2 e (Y10+Y1
) )/2 )  k通るNkで表わされる。すなわち A1=  (YIO−Yll)/(XIOX1l)B1
=(XtoYto  YllXII)/(XIO−Xl
l)とすることくよシtlは Y=Alx+B1 となる。つぎに弦tz Fi傾き(Xll  X12)
/(Y工I  X12)で表わされる直線であり、この
弦t2と直交する垂直二等分線t2は傾き−(Ytt−
X12 )/ (Xll  X12 )であシ座標((
X1□+X12 )/2 # (Yll +Y12 )
/ 2 ) ’It通る画線で表わされる。すなわちA
2==−(Yll−X12 )/(Xll−X12 )
 B 2=(Xll Yll−X12X12 )/(X
u−X 12 )  とすることによりt2はY=A2
X +B2 となる。したがって、前記二つの弦の垂直二等分1) 
L 1とt2  との交点の座標は((Bl−−B2 
)/(A2−AI ) 、 (BIAz −AlB2 
)/(A2−AI)) であることからgillの内周2の中心座* (Xto
o eYloo )は X1oo=(Bt  B2)/(A2−AI)Y1oo
=(Bt人2−人IB2)/(A2−AI)となる。
The chord t1 has a slope (Xlo-Xlt)/(YIO-Yll
), and the perpendicular bisector t1 perpendicular to this chord t1 has a slope of -(YIOYll)/(XIO-Xll) and the coordinates ((Xto+Xtt)/2 e (Y10+Y1
))/2) It is expressed as Nk through k. That is, A1= (YIO-Yll)/(XIOX1l)B1
=(XtoYtoYllXII)/(XIO−Xl
Note that tl is Y=Alx+B1. Next, the string tz Fi slope (Xll X12)
/(Ywork I
X12 ) / (Xll X12 ) and coordinates ((
X1□+X12 )/2 # (Yll +Y12)
/2) 'It is represented by a drawing line that passes through it. That is, A
2==-(Yll-X12)/(Xll-X12)
B2=(Xll Yll-X12X12)/(X
u−X 12 ), t2 becomes Y=A2
It becomes X + B2. Therefore, the perpendicular bisect of the two chords 1)
The coordinates of the intersection of L 1 and t2 are ((Bl--B2
)/(A2-AI), (BIAz-AlB2
)/(A2-AI)), so the center position of the inner circumference 2 of gill* (Xto
o eYloo ) is X1oo=(Bt B2)/(A2-AI)Y1oo
= (Bt person 2 - person IB2)/(A2 - AI).

wL7図は前記方法により検出された情報領域3の第2
の内周4上の三点の座標(X20 e X20 ) a
(XnsYzx)s(X2zeY2g)から前記1)2
0円周4の中心座標を検出する方法を示している。
Figure wL7 shows the second area of information area 3 detected by the above method.
Coordinates of three points on inner circumference 4 of (X20 e X20) a
(XnsYzx)s(X2zeY2g) to the above 1)2
A method for detecting the center coordinates of the 0th circumference 4 is shown.

ここで第2の内周4の中心座標k (X200 e X
20G)とする。
Here, the center coordinate k of the second inner circumference 4 (X200 e
20G).

前記三点の座標のうち座標(X2o、Y2o)と座標(
X21 # X21 )とを結んで弦t3とし、座標(
X21 # X21 )と座標(X22 s X22 
)  とを結んで弦t4とすると、円の二つの弦の垂直
二等分線の交点は円の中心となることから第2の内周4
の中心座標(X200 # Y2O0)が求まることに
なる。
Among the coordinates of the three points, coordinates (X2o, Y2o) and coordinates (
X21 #
X21 #X21 ) and coordinates (X22 s X22
) are connected to form chord t4, the intersection of the perpendicular bisectors of the two chords of the circle is the center of the circle, so the second inner circumference 4
The center coordinates (X200 #Y2O0) of

弦LsFi傾き(X20  X21)/(Y2O−X2
1)の直線でめ)、この弦t3と直交する垂直二等分線
t′3は傾き−(X20−X21 )/ (X20−X
21 )で座標((X20+X21 )/2 s (Y
2G+Y21 )/2 ) it通る直線で表わされる
。すなわち A3== −(Y2O−X21 ) / 
(X2G −X21 )B3=(XIOYIOYllX
II)/(XIO−X1))とすることによりt3は Y=A3ス十B3 となる。つぎに弦t4は傾き(X21−X22 ) /
(Ygx  Yzz)で表わされる直線であり、この弦
t4と直交する垂直二等分線t4は傾き−(YzxY2
2 )/ (X2l−Xxz)  であ)座標((X2
1+X2□)/2.(Yz□+Y22)/2)を通る直
線で表わされる。すなわちA4= −(X21  X2
1 )/(X21−X22 ) B4==(XztYz
l−X22X2z )/(X2l−X22)とすること
によ〕t4は Y冨A4X′+84 となる。し九がって、前記二つの弦の垂直二等分Wt3
とt4  との交点の座標扛 ((Bs  B4)/(A4−Aa)e(BsA4−A
aBt)/(A4−人3)) であることから第2の内周4の中心座l1l(X2G0
 *Y2O0)  は Xzoo=(B3  B4 )/(A4  A3 )Y
20G=(B3A4  A3B4)/(A4−As)と
なる。
String LsFi slope (X20 X21)/(Y2O-X2
1), the perpendicular bisector t'3 perpendicular to this chord t3 has a slope of -(X20-X21)/(X20-X
21 ) and the coordinates ((X20+X21 )/2 s (Y
It is represented by a straight line passing through 2G+Y21)/2)it. That is, A3== −(Y2O−X21 ) /
(X2G −X21 )B3=(XIOYIOYllX
II)/(XIO-X1)), t3 becomes Y=A3+B3. Next, the slope of chord t4 is (X21-X22) /
(Ygx Yzz), and the perpendicular bisector t4 perpendicular to this chord t4 has an inclination of −(YzxY2
2 ) / (X2l-Xxz) ) coordinates ((X2
1+X2□)/2. (Yz□+Y22)/2). That is, A4=-(X21 X2
1 )/(X21-X22) B4==(XztYz
By setting 1-X22X2z)/(X21-X22), t4 becomes Y-value A4X'+84. Therefore, the perpendicular bisector of the two strings Wt3
The coordinates of the intersection of and t4 ((Bs B4)/(A4-Aa)e(BsA4-A
aBt)/(A4-Person 3)), the center seat l1l of the second inner periphery 4 (X2G0
*Y2O0) is Xzoo=(B3 B4 )/(A4 A3 )Y
20G=(B3A4 A3B4)/(A4-As).

したがって上記検出された情報円盤lのfslの内周2
の中心座標(X1oo t Ytoo )から情報領域
3の第2の内周4の中心座標(X200 * Y2O0
) ’に減算し次値をもって情報領域3の偏心量とする
ことができる。すなわちX方向の偏心量xtoo −X
2GG會Y方向の偏心量はYloo−Y2O0で表わさ
れるととKなる。
Therefore, the inner circumference 2 of fsl of the information disk l detected above
From the center coordinates (X1oo t Ytoo ) of the second inner circumference 4 of the information area 3 (X200 * Y2O0
)' and the next value can be used as the eccentricity amount of the information area 3. That is, the eccentricity in the X direction xtoo −X
The amount of eccentricity in the Y direction of the 2GG is expressed as Yloo-Y2O0.

〔発明の効果〕〔Effect of the invention〕

本発明の偏心量測定方法はXY軸上に固定され九情報円
盤のIIlの内周上の3点の座標と情報領域の第2の内
周上の三点の座標とを光電変換手段によシxy軸上で撮
偉走査し、得られる2値化信号t−−形処理することに
よりXX座標として検出できるため、前記第1の内周上
の三座標と、第2の内周上の三座標とから、第1の内周
の中心座標と第2の内周の中心座IIヲ検出し、前記二
つの中心座標から偏心量を演算できるので、従来のよう
に作業者を必要とせす、測定のバラツキをなくし測定精
度の向上さらに測定時間の短縮がはかれるという効果が
あム。
The eccentricity measurement method of the present invention uses photoelectric conversion means to convert the coordinates of three points on the inner circumference of the information disk IIl fixed on the XY axes and the coordinates of three points on the second inner circumference of the information area. It can be detected as XX coordinates by scanning on the XY axis and processing the obtained binary signal t-form, so the three coordinates on the first inner circumference and the three coordinates on the second inner circumference can be detected. The center coordinates of the first inner circumference and the center position II of the second inner circumference can be detected from the three coordinates, and the amount of eccentricity can be calculated from the two center coordinates, so there is no need for a worker as in the past. This has the effect of eliminating measurement variations, improving measurement accuracy, and shortening measurement time.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図〜第7図は本発明に使用する方法を示すための説
明図、第8因は従来噌装置の一真例を示すプa、り融で
ある。 1・・・・・・情報円盤、2・・・・・・第1の内周、
3・・・・・・情報領域、4・・・・・・IX2の内周
、5・・・・・・情報円盤の外周、10・・・・・・X
Yテーブル、20〜22・・・・・・第1の内周を含む
領域、23〜25・・・・・・第2の内周を含む領域%
30・・・・・・作業者、3)・・・・・・顕微鏡、3
2・・・・・・カーソル発生手段、33・・・・・・X
YII標カウンタ、 a・・・・・・X移動量の座標信号、b・・・・・・Y
移動量の座標信号、0・・・・・・XY軸の原点、01
〜06・・・・・・Xy軸の原点、X1〜X6・・・・
・・XY軸上のX座標、Y。 〜Y6・・・・・・XY軸上のY座標%x1〜x6・・
・・・・xy軸上のX座標、y1〜y6・・・・・・X
l軸上のy座S。 XIO−wx12”””第1の内周上のX座標、YIO
−Y12・・・・・・第1の内周上のY座標s X 2
0 ”” X22・・・・・・第2の内周上のX座標、
Y20’=Y22・・・・・・1[2の内周上のX座標
、txmt2・・・・・・IIIの内周の弦、Z3et
4・・・・・・第2の内周の弦、t1〜t4 ・・・・
・・弦の垂直二等分線、X100・・・・・・第1の内
周中心のX座標、YIGO・・・・・・第1の内周中心
のX座標、X2GG・・・・・・第2の内周中心のX座
標%Y2O0・旧・・第2の内周中心のX座標。 第、1図 第2図 Y 21 (χ2.び、) 第3図 第4図 第5図 巖6図 第7図
1 to 7 are explanatory diagrams showing the method used in the present invention, and the eighth factor is a plastic melting method showing an example of a conventional method. 1... Information disk, 2... First inner periphery,
3...Information area, 4...Inner circumference of IX2, 5...Outer circumference of information disk, 10...X
Y table, 20-22...Area including the first inner circumference, 23-25...Area % including the second inner circumference
30...Worker, 3)...Microscope, 3
2...Cursor generation means, 33...X
YII mark counter, a...Coordinate signal of X movement amount, b...Y
Coordinate signal of movement amount, 0...Origin of XY axis, 01
~06...Origin of Xy axis, X1~X6...
...X coordinate on the XY axis, Y. ~Y6...Y coordinate on the XY axis %x1~x6...
...X coordinates on the xy axis, y1 to y6...X
y-locus S on the l-axis. XIO-wx12"""X coordinate on the first inner circumference, YIO
-Y12... Y coordinate on the first inner circumference s X 2
0 ”” X22...X coordinate on the second inner circumference,
Y20'=Y22...1[X coordinate on the inner circumference of 2, txmt2......chord on the inner circumference of III, Z3et
4... Second inner string, t1 to t4...
...Perpendicular bisector of the string, X100...X coordinate of the center of the first inner circumference, YIGO...X coordinate of the center of the first inner circumference, X2GG... - X coordinate of the center of the second inner circumference %Y2O0 - Old - X coordinate of the center of the second inner circumference. Fig. 1 Fig. 2 Y 21 (χ2. bi) Fig. 3 Fig. 4 Fig. 5 Figure 6 Fig. 7

Claims (1)

【特許請求の範囲】[Claims] XY平面上の情報円盤(1)の第1の内周(2)を含む
領域を光電変換手段によりxy平面上で走査して得られ
る映像信号の2値化信号の論理“0”と論理“1”との
境界線上のxy座標を検出し、XY平面上の座標に変換
して得られる前記第1の内周(2)上の三点の座標のう
ち二点の座標を用いて結べる、二つの弦の垂直二等分線
の交点を前記第1の内周(2)の中心座標とし、さらに
前記XY平面上の情報円盤(1)の情報領域(3)の第
2の内周(4)を含む領域を光電変換手段によりxy平
面上で走査して得られる映像信号の2値化信号の論理“
0”と論理“1”との境界線上のxy座標を検出し、X
Y平面上の座標に変換して得られる前記第2の内周4上
の三点の座標のうち二点の座標を用いて結べる、二つの
弦の垂直二等分線の交点を前記第2の内周(4)の中心
座標とすることにより、前記第1の内周(2)の中心座
標から前記第2の内周(4)の中心座標を減算すること
により情報円盤1の情報領域3の偏心量とすることを特
徴とする偏心量測定方法。
Logic "0" and logic "" of the binary signal of the video signal obtained by scanning the area including the first inner circumference (2) of the information disk (1) on the XY plane on the xy plane by photoelectric conversion means 1", and can be connected using the coordinates of two of the three points on the first inner circumference (2) obtained by detecting the xy coordinates on the boundary line with the first inner circumference (2) and converting them to coordinates on the XY plane. The intersection of the perpendicular bisectors of the two chords is the center coordinate of the first inner circumference (2), and the second inner circumference ( 4) Logic of the binarized signal of the video signal obtained by scanning the area including the area on the xy plane with photoelectric conversion means
Detect the xy coordinates on the boundary line between “0” and logical “1”, and
The intersection of the perpendicular bisectors of the two chords, which can be connected using the coordinates of two of the three points on the second inner circumference 4 obtained by converting the coordinates on the Y plane, is the second By subtracting the center coordinates of the second inner circumference (4) from the center coordinates of the first inner circumference (2), the information area of the information disk 1 can be calculated. A method for measuring an amount of eccentricity, characterized in that the amount of eccentricity is set as an amount of eccentricity of 3.
JP7484385A 1985-04-09 1985-04-09 Method for measuring extent of eccentricity Pending JPS61233306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7484385A JPS61233306A (en) 1985-04-09 1985-04-09 Method for measuring extent of eccentricity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7484385A JPS61233306A (en) 1985-04-09 1985-04-09 Method for measuring extent of eccentricity

Publications (1)

Publication Number Publication Date
JPS61233306A true JPS61233306A (en) 1986-10-17

Family

ID=13559009

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7484385A Pending JPS61233306A (en) 1985-04-09 1985-04-09 Method for measuring extent of eccentricity

Country Status (1)

Country Link
JP (1) JPS61233306A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0749212A (en) * 1993-06-15 1995-02-21 Niigata Plant Service Kk Center indexing method and transfer method for cake or the like
CN105066887A (en) * 2015-09-09 2015-11-18 浙江中烟工业有限责任公司 Method for verifying eccentric angle influence in cigarette and filter stick length measurement
CN105136051A (en) * 2015-09-09 2015-12-09 浙江中烟工业有限责任公司 Method for verifying multipoint measurement influence in cigarette and filter stick circumference measurement
CN105136043A (en) * 2015-09-09 2015-12-09 浙江中烟工业有限责任公司 Method for verifying multipoint measurement influence in cigarette and filter stick length measurement
CN105241388A (en) * 2015-09-09 2016-01-13 浙江中烟工业有限责任公司 Method of verifying eccentric distance effects in case of cigarette and filter rod length measurement
CN105423933A (en) * 2015-09-09 2016-03-23 浙江中烟工业有限责任公司 Verification method of influence of eccentric distance during circumferential measurement of cigarette and filter stick
CN105606029A (en) * 2015-09-09 2016-05-25 浙江中烟工业有限责任公司 Cigarette and filter rod length measurement standard apparatus
CN105823443A (en) * 2016-03-21 2016-08-03 西北核技术研究所 Method and device for measuring coaxiality of accelerator cathode-magnet sleeve
CN110715621A (en) * 2018-07-12 2020-01-21 大族激光科技产业集团股份有限公司 Detection method, device and equipment

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0749212A (en) * 1993-06-15 1995-02-21 Niigata Plant Service Kk Center indexing method and transfer method for cake or the like
CN105066887A (en) * 2015-09-09 2015-11-18 浙江中烟工业有限责任公司 Method for verifying eccentric angle influence in cigarette and filter stick length measurement
CN105136051A (en) * 2015-09-09 2015-12-09 浙江中烟工业有限责任公司 Method for verifying multipoint measurement influence in cigarette and filter stick circumference measurement
CN105136043A (en) * 2015-09-09 2015-12-09 浙江中烟工业有限责任公司 Method for verifying multipoint measurement influence in cigarette and filter stick length measurement
CN105241388A (en) * 2015-09-09 2016-01-13 浙江中烟工业有限责任公司 Method of verifying eccentric distance effects in case of cigarette and filter rod length measurement
CN105423933A (en) * 2015-09-09 2016-03-23 浙江中烟工业有限责任公司 Verification method of influence of eccentric distance during circumferential measurement of cigarette and filter stick
CN105606029A (en) * 2015-09-09 2016-05-25 浙江中烟工业有限责任公司 Cigarette and filter rod length measurement standard apparatus
CN105823443A (en) * 2016-03-21 2016-08-03 西北核技术研究所 Method and device for measuring coaxiality of accelerator cathode-magnet sleeve
CN110715621A (en) * 2018-07-12 2020-01-21 大族激光科技产业集团股份有限公司 Detection method, device and equipment
CN110715621B (en) * 2018-07-12 2021-07-02 大族激光科技产业集团股份有限公司 Detection method, device and equipment

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