JPS6170404A - Position detector of linear mark - Google Patents
Position detector of linear markInfo
- Publication number
- JPS6170404A JPS6170404A JP19226584A JP19226584A JPS6170404A JP S6170404 A JPS6170404 A JP S6170404A JP 19226584 A JP19226584 A JP 19226584A JP 19226584 A JP19226584 A JP 19226584A JP S6170404 A JPS6170404 A JP S6170404A
- Authority
- JP
- Japan
- Prior art keywords
- output
- elements
- linear mark
- voltages
- circuit
- 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
Links
- 239000000126 substance Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、紙、７ イｒレム、布帛、金属板およびその
他の板状物体の表面上の線状マーク位置全検出するため
、光源、複数個の受光素子を組合せて構成した位置検出
器の改良に関するものであり、この種検出器の製造技術
屋≠の分野において利用されるものであるっ
（従来の技術）
従来、例えば、走行フィルム、紙等の板状物体の位置検
出手段としては１通常、板状物本の耳端における反射光
あるいは透過光？受光素子に投影し、その受光量に比例
した出力＠圧１／（Ｊ：Ｐ）物体の位置を検出する方法
が知られている。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention uses a light source, This relates to the improvement of a position detector constructed by combining a plurality of light-receiving elements, and is used in the field of manufacturing technology for this type of detector (prior art). As a means for detecting the position of a plate-shaped object such as paper, 1.Usually, reflected light or transmitted light at the edge of a plate-shaped object? A method is known in which the position of an object is detected by projecting the light onto a light-receiving element and producing an output @pressure 1/(J:P) proportional to the amount of light received.
しかしながら、この方法の場合は、板状物体の耳端が波
状に変形した場合、正常な位置信号が得られなくなつ之
り、また、透明物体では耳端の光量変化が極めて小さい
之め位置信号が得られないと込う大きな欠点？有してい
る。However, with this method, if the edge of the plate-shaped object is deformed into a wavy shape, it becomes impossible to obtain a normal position signal, and in the case of a transparent object, the change in the amount of light at the edge of the edge is extremely small, so the position signal cannot be obtained. Is it a big drawback that you can't get it? have.
そこで、上記の欠点全除去するために、第１図に示すよ
うな受光素子１および２全用い念、線状マークの光電式
位置検出方法が提案されている。In order to eliminate all of the above-mentioned drawbacks, a photoelectric position detection method for linear marks has been proposed in which the light receiving elements 1 and 2 are used as shown in FIG.
該受光素子はホトダイオード、太陽電池等の一種の光半
導体であり、線状マーク３の光源４による投影により受
光部が変化する。 受光素子Ｉおよび２の中心位置よ
り線状マーク中心の偏位ｄＫ。The light-receiving element is a type of optical semiconductor such as a photodiode or a solar cell, and the light-receiving portion changes as the linear mark 3 is projected by the light source 4. Deviation dK of the center of the linear mark from the center position of the light receiving elements I and 2.
対する受光素子１および増幅器５の出力′ｆ、ＥＥｅ、
の特性全第２図上側ｅＩＶｃ示すっ 同様に受光素子２
および増幅器６の特性を第２図上側ｅ２に示す。The output 'f of the light receiving element 1 and the amplifier 5, EEe,
All the characteristics of the upper eIVc in Figure 2 are shown.Similarly, the light receiving element 2
The characteristics of the amplifier 6 are shown in the upper part e2 of FIG.
この出力電圧ｅ１およびｅ２の差を演算増幅器７により
求め出力ｅｏｋ得る。 偏位に対するこの出力電圧ｅＱ
の関係？、箒２図下側に示す。 このようにして、受光
素子の中心より線状マークの偏位の＋・−に対し、比例
しγζ＋・−の出力電圧ｅｎＫより位置が検出できる。The difference between the output voltages e1 and e2 is determined by the operational amplifier 7 to obtain the output eok. This output voltage eQ for the deviation
connection of? , shown at the bottom of Figure 2. In this way, the position can be detected from the output voltage enK of γζ+.- which is proportional to the deviation of the linear mark from the center of the light-receiving element.
しかしながら、この検出器の検出信号は受光素子の
存在する範囲にとどまり、線状マークの偏差がその範囲
全越えて、第２図下側に示すよう［ｄｍ十以上あるいは
誦−以下になると出力電圧か零となり１位置検出器号か
得られず無制御になるとＡう欠点を有している。However, the detection signal of this detector remains within the range where the light-receiving element exists, and when the deviation of the linear mark exceeds that range, as shown in the lower part of Figure 2, the output voltage is It has the disadvantage that if the value becomes zero and no control occurs because the first position detector number cannot be obtained.
（発明が解決しようとする問題点）
本発明は、上記の欠点？除去するために研究、開発され
たもので、その目的とするところは、線状マークが、受
光素子よりどれだけはずれても。(Problems to be Solved by the Invention) Does the present invention have the above-mentioned drawbacks? It was researched and developed to remove the linear mark, no matter how far it deviates from the light-receiving element.
常に安定な位置方向信号を発生するこ七により、板状物
体の位置全幅広く検出できる線状マークの位置検出器？
提供するにある。A linear mark position detector that can detect a wide range of positions on plate-shaped objects by constantly generating stable position and direction signals.
It is on offer.
（問題点を解決するための手段）
本発明の線状マークの位置検出器は、線状のマーク全透
過あるいけ反射し念光線全２個の光電素子に投影して線
状マークの位ｋｆ検出ｆる位置検出器において、さらに
１個″！念は複数個の光電素子と、それらの光７素子の
信号処理回路と全備えたこと全特徴とするものである。(Means for Solving the Problems) The linear mark position detector of the present invention projects the linear mark's position kf by completely transmitting or reflecting the linear mark and projecting it onto two photoelectric elements. In the position detector for detection, one additional feature is that it is equipped with a plurality of photoelectric elements and a signal processing circuit for these seven optical elements.
（作 用）
本発明は、２個の受光素子の差信号により位置に比例し
之信号全得、これにさらに１個あるいは複数個の受光素
子を追加使用してこね、らの信号２組合せることにより
、これら受光素子から遠く離れた位置においても一定の
位置信号−？辱るこおができるものである。(Function) The present invention obtains the total signal proportional to the position by the difference signal of two light receiving elements, further uses one or more light receiving elements to knead it, and combines the two signals. By doing so, a constant position signal can be obtained even at a position far away from these light receiving elements. It is something that can be humiliated.
（実施例）
以下２図面と参照しながら、本発明の一実施例について
説明する。(Example) An example of the present invention will be described below with reference to two drawings.
ｇＩＪ３図は本発明の一実施例を示すもので、８は光源
である。９Ｆｉ紙、フィルム等移動物座上にかかれた線
状マークの光電素子１０・１１・１２上の投影である。Figure gIJ3 shows an embodiment of the present invention, and 8 is a light source. This is a projection of a linear mark placed on a moving object such as 9Fi paper or film onto photoelectric elements 10, 11, and 12.
光電素子１０・１１あるいは１２の出力は増幅器１３・
１４あるいは１５ＶＣより増幅されて出力電圧、〕、＃
ｅ２あるいはｅｓを作る。 この電圧ｅ、およびｅ２は
演算増幅器１５’により次式の演算全し出力り全高る。The output of the photoelectric element 10, 11 or 12 is sent to the amplifier 13.
The output voltage is amplified from 14 or 15 VC, ], #
Create e2 or es. These voltages e and e2 are increased by the operational amplifier 15' according to the following equation.
′ｔなわち、
ｅＤ ：ｅｉ−ｅｌ
光電素子（光電検出器）１０および１１の中心と、線状
マークの中心との偏差ｄに対するｅＩ＋”２およびｅｓ
の特性を第４図囚に、また偏差ｄに対するｅＤの関係全
第４図口に示す。't That is, eD :ei-el eI+''2 and es for the deviation d between the centers of the photoelectric elements (photoelectric detectors) 10 and 11 and the center of the linear mark
The characteristics of are shown in Figure 4, and the relationship of eD to deviation d is shown in Figure 4.
次に、電圧ｅ、およびｅ２の最大値、すなわち、男４図
囚の■−■−〇４→、ｅＭｋπ３図の最大値回路１６で
作る。 ’ＣａＥ ｅｓとこの最大直回路工６の出力の
差音演算増幅器１６゛で求める。すなわち。Next, the maximum values of the voltages e and e2 are created by the maximum value circuit 16 of the figure 4 - 4 → eMkπ3. The difference between CaE es and the output of this maximum direct circuit circuit 6 is determined by the operational amplifier 16. Namely.
ｅｓ ＝ ｅｓ −ｅＭ この結果全第４図（ｑに示す。es = es - eM The entire result is shown in Figure 4 (q).
この電圧ｅｓと比較器ＦＥｅｃを比較器１７により求め
る。比較器の出力電圧ｅＨを第４図ｐ＋ＶＣ示す。この
ｅ）■の反転電圧δＨ？符号変換器１８により求める。This voltage es and the comparator FEec are determined by the comparator 17. The output voltage eH of the comparator is shown in FIG. 4 p+VC. This e) ■ reversal voltage δH? It is determined by the code converter 18.
この結果を第４図口に点線で示す。This result is shown by the dotted line in Figure 4.
今、もし、偏差ｄがａ、 （ａ’（ｄ２七すると、第４
図（ハ）のｅＤ＋と同図◎のｅＨとの論理和かＡＮＤ回
路１９により得られるので、７リソプフロノプ回路２０
はセットされ、出力 Ｑ ＝ＯＮ、 Ｑ ＝ＯＦ
Ｆとなる。これによりアナログゲート２１に開くか、こ
の範囲の偏差ｄ′？′は符号変俟器１８の出力…Ｈは負
であるので贅流器２２の出力は零となり、アナログゲー
ト２１の出力は雫である。Now, if the deviation d is a, (a'(d27, then the fourth
Since it can be obtained by the logical sum or AND circuit 19 of eD+ in the figure (c) and eH in the figure ◎, 7 lithopronop circuits 20
is set, output Q = ON, Q = OF
It becomes F. Will this open the analog gate 21?Difference d' in this range? ' is the output of the sign converter 18... Since H is negative, the output of the luxury converter 22 is zero, and the output of the analog gate 21 is a drop.
おころが、ａ）ａ２となる七、沈４図ＬＤ）ＶＣ示すよ
うにｉＨが発生するので、最大値回路２３ＶＣより、出
力ｅｌ、は第４図０のｅＨ＋７〕ようになる。すなわち
、ｄ＞ｄ２の間、出力り０は出放しとなる。Since iH is generated as shown in Figure 4LD)VC, the output el from the maximum value circuit 23VC becomes eH+7] in Figure 40. That is, while d>d2, the output 0 is left out.
次に、偏差ｄが減少し、ｄ４まで変化し次とする。Next, the deviation d decreases and changes to d4, which is then taken as the next step.
こｈＶＣ応じて出力ｅＱは第４図（ハ）に示すように、
［Ｆ］−■−■−■−■−■の軌跡？たどって変化する
っこのときｄ、 ＞ ｄ＞ ｄ４の範囲では、符号変換
器１８の出力ＪＩの反転信ターが符号ｆ換器２４で得ら
べま之、演算増幅器１５°の出力ｅＤ−（第４図β）の
反転信号が符号変換器２５で得られ、これらの論理和か
ＡＮＤ回路２６によ’）ｆ’＞られるので、フリツプフ
ロツプ回路２０ハリセットされ、出力０ ＝ＯＮ、
０＝○ＦＦとなる。これによりアナログゲート２７は
開くが、この範囲の偏差ｄでは比較器Ｉ７の出力ｅＩＩ
は正であるので、整流器２８の出力は零となり、アナロ
グゲート２７の出力は零である。According to hVC, the output eQ is as shown in Fig. 4 (c),
[F] −■−■−■−■−■ trajectory? In the range of d > d > d4, the inverted signal of the output JI of the code converter 18 is obtained by the code converter 24, and the output eD-( The inverted signal β) in FIG. 4 is obtained by the code converter 25 and is logically summed or ')f' by the AND circuit 26, so that the flip-flop circuit 20 is reset and the output 0 = ON.
0=○FF. This opens the analog gate 27, but in this range of deviation d, the output eII of the comparator I7
Since is positive, the output of the rectifier 28 is zero, and the output of the analog gate 27 is zero.
ところが、ａ（ａ、となると、第４図０に示すよ１
、ｉｃ ｅａ７５”Ｂ’Ｉ： ｆｈ Ｏｆ 、
／ｌ＊’ｔ’、＠Ｍ ２３ＶＣヨり 、ｔＢ力ｅ６け
第４図に）のｅＨ−のようになる。すなわち。However, when it comes to a(a), as shown in Figure 4, 1
, ic ea75”B'I: fh Of ,
/l*'t', @M 23 VC, tB force e6 (see Figure 4) becomes eH-. Namely.
ａ（ａ４の間、出力ｅＱは負のｆ直を連続して出す。a(During a4, the output eQ continuously outputs negative f directivity.
以上のようにして、偏差ｄの値が＋ω＞ｄ＞−ｏ３ＶＣ
対して１本位置検出器の出力電田ｅＱは第４図０に示す
ように［Ｆ］〜■−■−の一■−■−■−■−■となる
。As described above, the value of deviation d is +ω>d>-o3VC
On the other hand, the output voltage eQ of the single position detector becomes [F] ~■-■-1■-■-■-■-■ as shown in FIG. 40.
この結果、偏差か受光素子の寸法に比し比較的大であっ
ても正負の位置出力電圧か辱らハ、動作範囲？広範囲に
広めるこ七ができた。As a result, even if the deviation is relatively large compared to the dimensions of the light-receiving element, the positive and negative position output voltages will be affected, and the operating range? We were able to spread the word over a wide area.
本発明の実施例によれば、検出７圧持性の線形性は非常
によく、検出範囲も正負共非常に大となる効果がある。According to the embodiment of the present invention, the linearity of the detection pressure holding property is very good, and the detection range is also very large in both positive and negative directions.
なお、追加光電素子は上述した実施例のように１個の場
合のほか、複数個でも可能である。Note that the number of additional photoelectric elements may be one as in the above-mentioned embodiment, or a plurality of additional photoelectric elements may be provided.
（発明の効果）
以上詳述したように、本発明によれば、板状物本の線状
マークの位置を直線性ｌく、ま之極めて広い範囲にわ之
っで検出できる多大の特長？有する。 さらにま之、移
動物体の端面か波状に変形していても検出できる効果か
あり、かつ静止中６あるいは移動中の板状物体でも位置
検出か可能であり１本発明に係る検出器にすべての板状
物体の表面上の線状マークに有効に適用できるものであ
る。(Effects of the Invention) As detailed above, the present invention has the great advantage of being able to detect the position of a linear mark on a plate-shaped object with high linearity and over an extremely wide range. have Furthermore, the detector according to the present invention has the effect of being able to detect even if the end face of a moving object is deformed in a wave-like manner, and it is also possible to detect the position of a stationary object or a moving plate-like object. This can be effectively applied to linear marks on the surface of a plate-like object.
第１図は従来の線状マークの光電式偏位検出器１７）構
成図、第２図はその偏位・電気持性金示す概略図である
。
第３図は本発明の一実施例全示す概略図であり、第４図
はその特性？示す説明図で、同図ｔＡ）は光電素子出力
電圧特性、同図（Ｕは出力電圧特性、同図（ｑは追加光
１素子の差動電圧特性、同図０は比較電圧特性を示して
Ａる。
８・・・光 源、 ９−投 影。
１０・１１・１２・光電素子、１３・１４−１５・・・
増幅器。
１６ 最大値回路、１５°・１６’・・演算増幅器。
１７・・・比較器、１８・・・符号変換器、１９・ Ａ
ＮＤ回路、２０ ・７す１１７０７１回路、２１ ・
アナログデート、２２・・整 流 器、２３・・・最大
値回路、２４・２５・・符号変換器。
２６・・・ＡＮＤ回路、２７ ７六ログゲート、２８・
整流器。FIG. 1 is a block diagram of a conventional linear mark photoelectric deflection detector 17), and FIG. 2 is a schematic diagram showing its deflection and electrical characteristics. Fig. 3 is a schematic diagram showing an embodiment of the present invention, and Fig. 4 shows its characteristics. In this explanatory diagram, tA) shows the output voltage characteristics of the photoelectric element, U shows the output voltage characteristics, q shows the differential voltage characteristics of one additional optical element, and 0 shows the comparison voltage characteristics. A. 8... Light source, 9- Projection. 10, 11, 12, Photoelectric element, 13, 14-15...
amplifier. 16 Maximum value circuit, 15°/16'... operational amplifier. 17... Comparator, 18... Code converter, 19.A
ND circuit, 20 ・7S117071 circuit, 21 ・
Analog date, 22... Rectifier, 23... Maximum value circuit, 24, 25... Code converter. 26...AND circuit, 27 76 log gate, 28.
rectifier.
Claims (1)
素子に投影して線状マークの位置を検出する位置検出器
において、さらに１個または複数個の光電素子と、それ
らの光電素子の信号処理回路とを備えたことを特徴とす
る線状マークの位置検出器。In a position detector that detects the position of a linear mark by projecting a light beam transmitted or reflected by a linear mark onto two photoelectric elements, the position detector further includes one or more photoelectric elements and the signals of those photoelectric elements. A linear mark position detector comprising a processing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19226584A JPS6170404A (en) | 1984-09-13 | 1984-09-13 | Position detector of linear mark |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19226584A JPS6170404A (en) | 1984-09-13 | 1984-09-13 | Position detector of linear mark |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6170404A true JPS6170404A (en) | 1986-04-11 |
Family
ID=16288403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19226584A Pending JPS6170404A (en) | 1984-09-13 | 1984-09-13 | Position detector of linear mark |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6170404A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0248408A2 (en) * | 1986-06-02 | 1987-12-09 | OMRON Corporation | A reflection type photo-electric switch |
| JPS63280512A (en) * | 1987-05-12 | 1988-11-17 | Omron Tateisi Electronics Co | Photoelectric switch |
-
1984
- 1984-09-13 JP JP19226584A patent/JPS6170404A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0248408A2 (en) * | 1986-06-02 | 1987-12-09 | OMRON Corporation | A reflection type photo-electric switch |
| JPS62284521A (en) * | 1986-06-02 | 1987-12-10 | Omron Tateisi Electronics Co | Photoelectric switch |
| US4926049A (en) * | 1986-06-02 | 1990-05-15 | Omron Tateisi Electronics Company | Reflection type photoelectric switch |
| JPS63280512A (en) * | 1987-05-12 | 1988-11-17 | Omron Tateisi Electronics Co | Photoelectric switch |
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