JPS60177217A - Rotary encoder - Google Patents
Rotary encoderInfo
- Publication number
- JPS60177217A JPS60177217A JP3150584A JP3150584A JPS60177217A JP S60177217 A JPS60177217 A JP S60177217A JP 3150584 A JP3150584 A JP 3150584A JP 3150584 A JP3150584 A JP 3150584A JP S60177217 A JPS60177217 A JP S60177217A
- Authority
- JP
- Japan
- Prior art keywords
- light
- emitting element
- disk
- light emitting
- receiving element
- 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
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 102100027340 Slit homolog 2 protein Human genes 0.000 description 1
- 101710133576 Slit homolog 2 protein Proteins 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007740 vapor deposition Methods 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
- G01D5/32—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 with attenuation or whole or partial obturation of beams of light
- G01D5/34—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/36—Forming the light into pulses
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/22—Analogue/digital converters pattern-reading type
- H03M1/24—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip
- H03M1/28—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding
- H03M1/30—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding incremental
- H03M1/301—Constructional details of parts relevant to the encoding mechanism, e.g. pattern carriers, pattern sensors
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は回転機の速度や回転位置を制御するのに用いら
れる光学式のロータリエンコーダに関し、特にその発光
素子の出力変化を補償するだめの受光素子を具えたロー
タリエンコーダに関する。[Detailed Description of the Invention] [Technical Field] The present invention relates to an optical rotary encoder used to control the speed and rotational position of a rotating machine. The present invention relates to a rotary encoder equipped with a rotary encoder.
第１図、第２図および第３図は一般的なこの種の光学式
ロータリエンコーダの一例を示す。ここで、ｌは回転軸
２に取付けられた回転スリットディスクであシ、ディス
ク１には第２図に示すようにその周辺部に沿って１個の
スリン）ＩＡおよび多数のスリン）ＩＢとが穿設されて
いて、この周辺部と対向する位置に配置された固定スリ
ット板３にはスリン）ＩＡおよび多数のスリン）ＩＢと
重なシ合う位置に固定スリット３Ａ、３Ｂおよび３Ｃが
形成されている（第３図参照）。周知のごとく、ＩＡは
１回転のホーム位置検出用であシ、ＩＢは位置例えば活
字の位置検出用である。FIGS. 1, 2, and 3 show an example of a common optical rotary encoder of this type. Here, l is a rotating slit disk attached to a rotating shaft 2, and the disk 1 has one slint (IA) and a number of slins) IB along its periphery as shown in FIG. Fixed slits 3A, 3B, and 3C are formed in the fixed slit plate 3, which is perforated and arranged at a position facing the peripheral part, at positions overlapping with the slit (IA) and a large number of slits (IB). (See Figure 3). As is well known, IA is used to detect the home position of one revolution, and IB is used to detect the position of, for example, a printed character.
４は発光素子、５は複数の受光素子であり、デイスク１
の回転に伴ってそのスリン）ＩＢが固定スリット３Ａお
よび３Ｂに、またスリットＩＡがスリット３Ｃと重なり
合う位置ごとに、発光素子４からの光がこれらのスリッ
トＩＢおよびＩＡと３Ａ、、３Ｂおよび３Ｃとを通過し
て受光素子５に受光されるので、この受光される光量の
変化が電気信号に変換され出力されることによって、そ
の出力信号に応じて制御がなされる。4 is a light emitting element, 5 is a plurality of light receiving elements, and disk 1
As the slits rotate, the light from the light emitting element 4 is transmitted to the fixed slits 3A and 3B, and at each position where the slit IA overlaps the slit 3C, the light from the light emitting element 4 is transmitted to the fixed slits IB and IA, 3A, 3B and 3C. Since the light passes through and is received by the light receiving element 5, the change in the amount of light received is converted into an electrical signal and output, and control is performed according to the output signal.
また、受光素子５には第２図および第３図に示すように
発光素子４からの光が上記のスリットＩＡ。Further, as shown in FIGS. 2 and 3, the light from the light emitting element 4 passes through the above-mentioned slit IA to the light receiving element 5.
］、Ｂと３Ａ、３Ｂおよび３Ｃとを介することなく受光
される位置にモニター受光素子部５Ｍが設けてアシ、こ
のモニター受光素子部５Ｍによって発光素子４からの発
光出力を監視している。], B, 3A, 3B, and 3C. A monitor light receiving element section 5M is provided at a position where light is received without passing through B, 3A, 3B, and 3C.The monitor light receiving element section 5M monitors the light emission output from the light emitting element 4.
すなわち、発光素子４は周囲温度の変化や経年変化によ
って、その発光出力が変化するので、このような変化を
補償するだめの発光量検出用としてモニター受光素子部
５Ｍが設けられているので、受光素子部５Ｍでの受光量
が常に一定となるように発光素子４を駆動する回路（図
示せず）によって発光素子４からの発光出力が制御され
る。That is, since the light emitting output of the light emitting element 4 changes due to changes in ambient temperature and changes over time, the monitor light receiving element section 5M is provided to detect the amount of light emitted to compensate for such changes. The light emission output from the light emitting element 4 is controlled by a circuit (not shown) that drives the light emitting element 4 so that the amount of light received by the element portion 5M is always constant.
しかしながら、このような従来のロータリエンコーダで
は、回転スリットディスク１にスリットＩＡを形成する
のに、ガラス板の片面にスリット部分を残して金属膜を
蒸着させる製法が一般に採用されておシ、ここで、スリ
ットパターンとディスク１の外周部との同軸度の精度を
共に高めようとするとコストアップを招くために、外周
部の心揺れはある程度許容されているのが通例である。However, in such conventional rotary encoders, in order to form the slits IA in the rotary slit disk 1, a manufacturing method is generally adopted in which a metal film is deposited on one side of the glass plate, leaving a slit portion. In order to increase the accuracy of coaxiality between the slit pattern and the outer periphery of the disk 1, the cost will increase, so it is customary to allow a certain degree of center fluctuation in the outer periphery.
そこで、この外周部の心揺れによって、ディスク１の回
転中に発光素子４からの光が影響を受けて変化すること
があシ、このために、発光出力が変化していないにかか
わらず、モニター用受光素子部５Ｍでの受光量が変化し
てしまう。Therefore, the light emitted from the light emitting element 4 may be affected and change while the disk 1 is rotating due to the vibration of the outer periphery. The amount of light received by the light receiving element section 5M changes.
すなわち、見掛は上では発光出力が変化したことになシ
、発光素子４からの発光出方の強弱を検知してその変化
を補償するという本来の目的が損なわれるのみならず、
不必要に発光素子４がらの出力を変化させてしまい、安
定した制御が得られない。In other words, although the light emission output does not appear to have changed, the original purpose of detecting the strength and weakness of the light emission from the light emitting element 4 and compensating for the change is not only lost, but also
The output of the light emitting element 4 is changed unnecessarily, and stable control cannot be obtained.
そこで、このような欠点を改良するために、発光素子４
の発光量を検出するモニター用受光素子を図示はしない
が回転スリットディスク１に対して発光素子と同一面側
の、この発光素子４と隣接させた位置に配置して、発光
素子４からの光のうち回転スリットディスク１の裏面か
ら反射された光を受光するようになし、回転中のスリッ
トディスク１によるその外周部の心揺れに起因する影響
をなくすようにすることが考えられる。Therefore, in order to improve such drawbacks, the light emitting element 4
Although not shown, a monitoring light receiving element for detecting the amount of light emitted from the light emitting element 4 is placed on the same side of the rotating slit disk 1 as the light emitting element and adjacent to the light emitting element 4. It is conceivable to receive the light reflected from the back surface of the rotating slit disk 1, thereby eliminating the influence caused by the oscillation of the outer circumferential portion of the rotating slit disk 1.
しかるに、単に上述したような配置とするのみでは、発
光素子４に対するモニター用受光素子の取付位置および
方向のばらつきが、反射光を受光するモニター用受光素
子の受光量にはねかえって影響し、発光出力の変化を補
償するためになされる調整作業が複雑化されてしまい、
その作業量の増大を招く。However, if the arrangement is simply as described above, variations in the mounting position and direction of the monitor light-receiving element with respect to the light-emitting element 4 will adversely affect the amount of light received by the monitor light-receiving element that receives reflected light, and the light emission will be affected. This complicates the adjustments made to compensate for changes in output.
This results in an increase in the amount of work.
本発明の目的は、上述したような問題点の解決を図るべ
く、回転スリットディスクの同一面側に、発光素子の発
光量を検出するモニター用受光素子と、発光素子とを壁
をへだてて隣接させるようにして同一ハウジング内に配
設し、ハウジングに設けた光通路を発光素子からの光の
うちディスクによシ反射された光がモニター用受光素子
に受光可能なようＫなして、モニター用受光素子の受光
量がディスクの回転動作や取付位置および方向の不斉−
のために影響されるようなことのないロータリエンコー
ダを提供することにある。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, it is an object of the present invention to install a light-receiving element for monitoring, which detects the amount of light emitted from a light-emitting element, and a light-emitting element adjacent to each other with a wall between them, on the same side of a rotating slit disk. The optical path provided in the housing is arranged so that the light reflected by the disk out of the light from the light emitting element can be received by the monitor light receiving element. The amount of light received by the light-receiving element may vary depending on the rotational movement of the disk or the mounting position and direction.
The objective is to provide a rotary encoder that is not affected by the
以下に図面に基づき本発明の詳細な説明する。 The present invention will be described in detail below based on the drawings.
第４〜第６図は本発明の一実施例を示し、第４図で６は
回転機、７は回転機６のケースと一体化されているエン
コーダケースでアシ、このエンコーダケース７に収納し
た回転スリットディスク１に対して、ディスク１の下面
側にあたるケースの所定位置にハウジング７Ａを固定す
るようになし、このハウジング７Ａに発光素子４とモニ
ター用受光素子８とを＃デは平行させた状態に配設する
。4 to 6 show an embodiment of the present invention. In FIG. 4, 6 is a rotating machine, and 7 is an encoder case that is integrated with the case of the rotating machine 6. A housing 7A is fixed to a predetermined position of the case on the lower surface side of the rotating slit disk 1, and the light emitting element 4 and the monitor light receiving element 8 are parallel to the housing 7A. to be placed.
なおここで、モニター用受光素子８は、これを発光素子
４の内側の回転軸２に寄せた位置に配置することにより
、ディスク１からの反射光のみの受光に好適なようにな
し、更にハウジング７Ａに形成する光通路７Ｂを反射光
のみの受光が好適なようにする。Here, the monitor light receiving element 8 is arranged at a position close to the rotating shaft 2 inside the light emitting element 4, so that it is suitable for receiving only the reflected light from the disc 1, and further, the housing The optical path 7B formed in 7A is made suitable for receiving only reflected light.
すなわち、外部からの光ノイズがモニター用受光素子８
に入力しないようにするためには、第５図に示すディス
ク１の形状からも明らかなように、受光素子８を内側に
配置する方が、ディスク１の裏面側の光沢ある金属蒸着
膜を広く反射面として利用することができて好適であり
、また、ディスク１の平面度が不十分なためなどにより
、ディスク１の回転中に面揺れが生じても、上述したよ
うな配置とすることによって、その揺れの量が少なくて
すみ、受光量への影響を抑制することができる０
７Ｃは光通路７Ｂの周囲から突設した位置決め部であり
、このような位置決め部７Ｂを設けることにより、発光
素子４やモニター用受光素子８を更に正確に・・ウジン
グ７Ａ内の定位置に固定することができる。In other words, optical noise from the outside is reflected in the monitor light receiving element 8.
As is clear from the shape of the disc 1 shown in FIG. It is suitable because it can be used as a reflective surface, and even if the surface shakes during rotation of the disk 1 due to insufficient flatness of the disk 1, the above-mentioned arrangement allows 7C is a positioning part protruding from the periphery of the optical path 7B, and by providing such a positioning part 7B, the amount of vibration can be reduced and the influence on the amount of light received can be suppressed. The element 4 and the monitor light-receiving element 8 can be more accurately fixed at fixed positions within the housing 7A.
更にまた、ハウジング７Ａけ第４図に示すようにその光
通路７Ｂをフード型となすと共に、光を透過しない材料
を用いて形成する。Furthermore, as shown in FIG. 4 of the housing 7A, the optical path 7B thereof is formed into a hood shape and is made of a material that does not transmit light.
このように構成したロータリエンコーダにあって、いま
、ディスク１が回転すると、発光素子４からの光はディ
スク１のスリットＩＡおよびＩＢを介して固定スリット
板３のスリット３Ａ、３Ｂおよび３Ｃから受光素子群５
にとそれぞれ受光されるが、本例では固定スリン）３Ａ
、３Ｂおよび３Ｃの各対応した位置に第７図に示すよう
に別個の受光素子５Ａ、５Ｂおよび５Ｃが設けてあり、
それぞれが独立に受光している。In the rotary encoder configured as described above, when the disk 1 rotates, the light from the light emitting element 4 passes through the slits IA and IB of the disk 1, and from the slits 3A, 3B, and 3C of the fixed slit plate 3 to the light receiving element. Group 5
In this example, the fixed Surin) 3A
, 3B and 3C, separate light receiving elements 5A, 5B and 5C are provided as shown in FIG.
Each receives light independently.
更にまた、同時に発光素子４からの光のうちディスク１
の裏面から反射された光がモニター用受光素子８によっ
て受光されており、発光素子４からの発光出力の強弱を
検知しているが、第４図に示す９はこれらの発光素子４
や受光素子５Ａ、 ５Ｂおよび５Ｃ１更にモニター受光
素子８に接続されて回転機６を制御する回路であり、９
Ａはその外面に回路９が、また、内面に受光素子群５が
それぞれ配置されている両面プリント基板である。Furthermore, at the same time, out of the light from the light emitting element 4, the disk 1
The light reflected from the back surface of the monitor is received by the monitor light-receiving element 8, and the intensity of the light emission output from the light-emitting element 4 is detected.
, light receiving elements 5A, 5B and 5C1 are further connected to the monitor light receiving element 8 to control the rotating machine 6;
A is a double-sided printed circuit board with a circuit 9 arranged on its outer surface and a light receiving element group 5 arranged on its inner surface.
なお、ここで回転スリットディスク１に蒸着して形成さ
れている金属膜（図示せず）は、一般にクロームやアル
ミニウムの膜であり、したがって反射効率が非常に高く
、その反射光でも十分な光量が得られる。特にガラス板
の場合は、その面が良く研磨されており、平面精度も高
く、光の乱反射がない上に、回転時におけるディスク１
０面揺れはエンコーダ出力信号の安定性を保持する上で
も低く保たれる必要があるので、そのように構成されて
おり、上記の反射光によって発光素子４の正確な発光音
の検出が可能なことは以上の条件からしても明らかであ
る。Note that the metal film (not shown) formed by vapor deposition on the rotating slit disk 1 is generally a chrome or aluminum film, and therefore has very high reflection efficiency, and even the reflected light has a sufficient amount of light. can get. In particular, in the case of a glass plate, the surface is well polished, the flatness is high, there is no diffuse reflection of light, and the disk 1 during rotation is
Since the zero plane fluctuation needs to be kept low in order to maintain the stability of the encoder output signal, it is configured in this manner, and the above reflected light allows accurate detection of the light emission sound of the light emitting element 4. This is clear from the above conditions.
次に、第７図によって制御回路の構成の一例を示す。す
なわち、本例では受光素子５Ａ、５Ｂおよび５Ｃからの
受光信号を増幅器１０．１１および１２の負の入力端子
側にそれぞれ供給し、増幅器１０゜１１および１２から
得られるエンコーダ出力信号１４．１５および１６によ
って回転機６を制御する。Next, FIG. 7 shows an example of the configuration of the control circuit. That is, in this example, the light receiving signals from the light receiving elements 5A, 5B and 5C are supplied to the negative input terminal sides of the amplifiers 10, 11 and 12, respectively, and the encoder output signals 14, 15 and 14 obtained from the amplifiers 10, 11 and 12 are 16 controls the rotating machine 6.
また、モニター用受光素子８からの受光信号を増幅器１
３の負の入力端子側に供給し、増幅器１３からのモニタ
ー出力信号ｖＭによって発光素子４に流れる電流を制御
し、その発光量を調節するが、このために、増幅器１３
からのモニター出力を抵抗Ｒを介してトランジスタ１７
のベースに供給するように構成する。In addition, the light receiving signal from the monitor light receiving element 8 is transmitted to the amplifier 1.
The current flowing through the light emitting element 4 is controlled by the monitor output signal vM from the amplifier 13, and the amount of light emitted is adjusted.
The monitor output from the transistor 17 is passed through the resistor R.
configured to supply the base of the
すなわち、ここでは、ベース電位が負の電位に保たれて
いるので、モニター受光素子８に受光される光量が太き
いと、絶対値の大きい負の電位となる。そこで、いま、
発光素子４の発光能力が低下してその出力が下がると、
モニター受光素子８での受光量が減少するので、ベース
電位は上がり、トランジスタ１７におけるベースとエミ
ッタ間の電圧−ｖｏＰが大きく々シ発光素子４に供給さ
れる電流が増加して、その発光量が増強される。That is, here, since the base potential is kept at a negative potential, if the amount of light received by the monitor light receiving element 8 is large, the potential becomes a negative potential with a large absolute value. So, now,
When the light emitting ability of the light emitting element 4 decreases and its output decreases,
Since the amount of light received by the monitor light-receiving element 8 decreases, the base potential rises, and the voltage -voP between the base and emitter of the transistor 17 increases.The current supplied to the light-emitting element 4 increases, and the amount of light emitted by it increases. will be strengthened.
また、発光素子４の発光能力が高まシ過ぎると、モニタ
ー受光素子８での受光量が増大することによってベース
電位が低下し、ベースとエミッタ間の電圧−■。Ｐが小
さくなって、発光素子４の発光量が抑制される。Furthermore, if the light emitting ability of the light emitting element 4 becomes too high, the amount of light received by the monitor light receiving element 8 increases, causing the base potential to drop, and the voltage between the base and the emitter to -■. P becomes small, and the amount of light emitted from the light emitting element 4 is suppressed.
以上説明したように、本発明によれば、発光素子の出力
変化を補償するだめの発光量検出用モニター受光素子と
この発光素子とを、回転スリットディスクの同一面側の
隣接した位置に設けて、しかもモニター用受光素子が発
光素子よシディスクの回転中心寄υに位置するようにな
し、発光素子からの光のうち回転スリットディスクによ
って反射された光のみをモニター用受光素子に受光させ
るようにしたので、外部からの光のノイズやディスクの
心揺れおよび面揺れによってモニター用受光素子に受光
される反射光量が変化するのを、従来に比し著しく低減
することができて１．モニター用受光素子に補償機能を
十分発揮させることができる。As explained above, according to the present invention, the light emitting element and the monitor light receiving element for detecting the amount of light emitted to compensate for changes in the output of the light emitting element are provided at adjacent positions on the same side of the rotating slit disk. Moreover, the monitor light-receiving element is located close to the light-emitting element and the center of rotation of the disk, so that only the light reflected by the rotating slit disk out of the light from the light-emitting element is received by the monitor light-receiving element. As a result, it is possible to significantly reduce changes in the amount of reflected light received by the monitor light receiving element due to external light noise and disk center and surface vibrations compared to the conventional method.1. The monitor light receiving element can fully exhibit its compensation function.
更にまた、発光素子とモニター受光素子とを、上述した
ような位置に位置決めする容器内に収納し、この容器を
エンコーダケースの所定位置に固定するようになして、
この容器に設ける光通路をディスクからの反射光のみの
受光に好適なように素子とを別々にケースに取付けるよ
うにすると、双方の相対取付は位置や方向にばらつきが
生じて、あとで個別の製品に対して調整作業を必要とし
たのが、その必要が力くなり、モニター受光素子の補償
機能を安定したものとすることができる。Furthermore, the light-emitting element and the monitor light-receiving element are housed in a container positioned at the above-described position, and the container is fixed at a predetermined position of the encoder case.
If the optical path provided in this container is suitable for receiving only the reflected light from the disk, and the element and the element are separately installed in the case, the relative installation of both will result in variations in position and direction, and later the individual The adjustment work required for the product has become more necessary, and the compensation function of the monitor light receiving element can be stabilized.
第１図は従来の光学式ロータリエンコーダの構成の概要
を一例として示す側面図、
第２図はそのスリットディスクを下面側から見た平面図
、
第３図はその固定スリット板および受光素子を下面側か
ら見た平面図、
第４図線本発明ロータリエンコーダの構成の一例を示す
部分断面図、
第５図はそのスリットディスクを下面側から見た平面図
、
第６図はその固定スリット板および受光素子群を下面側
から見た平面図、
第７図は本発明ロータリエンコーダの駆動回路の一例を
示す構成図である。
１・・・・・・ 回転スリットディスクＩＡ、ＩＢ・・
・・・・ スリット
２・・・・・・回転軸
３・・・・・・ 固定スリット板
３Ａ、３Ｂ、３Ｃ・・・・・・ スリット４・・・・・
・発光素子
５・・・・・・受光素子群
５Ａ、５Ｂ、５Ｃ°川゛用受光素子
５Ｍ・・・・・・受光素子部
６・・・・・回転機
７・・・・・・ エンコーダケース
７Ａ・・・・・・ハウジング
７Ｂ・・・・・・光通路
７Ｃ・・・・・・位置決め部
８・・・・・・モニター受光素子
９・・・・・・回路
９Ａ・・・・・・ 両面プリント基板
１０、 ＩＬ １２．１３・・・・・・増幅器１７・・
・・・・ トランジスタ。
第４図
第５図
第６図Fig. 1 is a side view showing an overview of the configuration of a conventional optical rotary encoder as an example; Fig. 2 is a plan view of the slit disk viewed from below; Fig. 3 is a plan view of the fixed slit plate and light receiving element from below. FIG. 4 is a partial sectional view showing an example of the configuration of the rotary encoder of the present invention; FIG. 5 is a plan view of the slit disk viewed from the bottom side; FIG. 6 is the fixed slit plate and FIG. 7 is a plan view of the light-receiving element group viewed from the bottom side. FIG. 7 is a configuration diagram showing an example of the drive circuit of the rotary encoder of the present invention. 1... Rotating slit disk IA, IB...
... Slit 2 ... Rotating shaft 3 ... Fixed slit plate 3A, 3B, 3C ... Slit 4 ...
- Light emitting element 5... Light receiving element group 5A, 5B, 5C degree river light receiving element 5M... Light receiving element section 6... Rotating machine 7... Encoder Case 7A...Housing 7B...Optical path 7C...Positioning section 8...Monitor light receiving element 9...Circuit 9A... ...Double-sided printed circuit board 10, IL 12.13...Amplifier 17...
...transistor. Figure 4 Figure 5 Figure 6
Claims (1)
介して、検出可能な第１受光素子と、前記発光素子の出
力変化を補償するための第２受光素子とを具えたロータ
リエンコーダにおいて、前記発光素子および前記第２受
光素子を、前記スリットディスクの同一面側において同
一容器内に配置し、かつ前記第２受光素子を前記発光素
子より前記スリットディスクの軸心寄シの位置に配置し
て、前記発光素子からの光のうち前記スリットディスク
により反射された光を前記第２受光素子により受光させ
るようになしたことを特徴とするロータリエンコーダ。 （以下余白）[Scope of Claims] A first light receiving element capable of detecting an optical signal from a light emitting element via a rotating slit disk, and a second light receiving element for compensating for changes in the output of the light emitting element. In the rotary encoder, the light-emitting element and the second light-receiving element are arranged in the same container on the same side of the slit disk, and the second light-receiving element is placed at a position where the axis of the slit disk is offset from the light-emitting element. A rotary encoder, characterized in that the rotary encoder is arranged at a position such that the light reflected by the slit disk out of the light from the light emitting element is received by the second light receiving element. (Margin below)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3150584A JPS60177217A (en) | 1984-02-23 | 1984-02-23 | Rotary encoder |
| US06/661,822 US4712000A (en) | 1983-10-21 | 1984-10-17 | Rotary encoder with source-adjacent light sampling and control |
| DE19843438461 DE3438461A1 (en) | 1983-10-21 | 1984-10-19 | ROTATING ENCODER |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3150584A JPS60177217A (en) | 1984-02-23 | 1984-02-23 | Rotary encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60177217A true JPS60177217A (en) | 1985-09-11 |
Family
ID=12333076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3150584A Pending JPS60177217A (en) | 1983-10-21 | 1984-02-23 | Rotary encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60177217A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62174661A (en) * | 1985-10-09 | 1987-07-31 | クレイン コムパニ− | Optical fiber type rotational speed encoder |
| JP2007147625A (en) * | 2005-11-28 | 2007-06-14 | Avago Technologies Ecbu Ip (Singapore) Pte Ltd | Optical encoder having contamination detection function |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50113250A (en) * | 1974-02-14 | 1975-09-05 |
-
1984
- 1984-02-23 JP JP3150584A patent/JPS60177217A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50113250A (en) * | 1974-02-14 | 1975-09-05 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62174661A (en) * | 1985-10-09 | 1987-07-31 | クレイン コムパニ− | Optical fiber type rotational speed encoder |
| JP2007147625A (en) * | 2005-11-28 | 2007-06-14 | Avago Technologies Ecbu Ip (Singapore) Pte Ltd | Optical encoder having contamination detection function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8508726B2 (en) | Rotary position detector and associated methods | |
| US4654525A (en) | Optical rotary encoder | |
| US20110101209A1 (en) | Rotary position detector and associated methods | |
| US7688432B1 (en) | Rotary position detector and associated methods | |
| US4224514A (en) | Optical encoder | |
| US4326128A (en) | Incremental rotary transmitter | |
| US4319134A (en) | Optical encoder | |
| US4037157A (en) | Electro-optical speed transducer | |
| JP2001188017A (en) | Optical rotary encoder and motor controller | |
| US4160200A (en) | Servo control apparatus | |
| CN111279158A (en) | Grating disc and feedback system | |
| US10955266B2 (en) | Light detector employing trapezoidal chips | |
| EP1258710A2 (en) | Rotation angle detecting apparatus and its rotary disc | |
| JPS60177217A (en) | Rotary encoder | |
| JP2004077214A (en) | Rotation angle detecting device and rotating disk therefor | |
| JPH0472169B2 (en) | ||
| JPH0290017A (en) | Multi-rotation-type absolute value encoder | |
| JPS60177218A (en) | Rotary encoder | |
| JPS6089710A (en) | Rotary encoder | |
| JPH10253396A (en) | Rotary encoder | |
| CN104121869B (en) | Rotational position detection device and correlation technique | |
| JPS622845A (en) | Motor | |
| JPS6041289B2 (en) | position detector | |
| JPS6230461Y2 (en) | ||
| JPS60113110A (en) | Position detector |