JPS59143918A - Pulse encoder - Google Patents
Pulse encoderInfo
- Publication number
- JPS59143918A JPS59143918A JP1746883A JP1746883A JPS59143918A JP S59143918 A JPS59143918 A JP S59143918A JP 1746883 A JP1746883 A JP 1746883A JP 1746883 A JP1746883 A JP 1746883A JP S59143918 A JPS59143918 A JP S59143918A
- Authority
- JP
- Japan
- Prior art keywords
- light
- led
- phase
- receiving element
- mask
- 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
- 230000002452 interceptive effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000009792 diffusion process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 238000007493 shaping process Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000012780 transparent material 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
- 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
- G01D5/347—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 using displacement encoding scales
- G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
- G01D5/34715—Scale reading or illumination devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Optical Transform (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、回転系の位置検出または速度検出に用いられ
るノ４ルスエンコーグに関−ｔ ル。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nozzle encoder used for detecting the position or speed of a rotating system.
従来用いられているパルスエンコーダの概略ノ構成が第
１図に示される。発光ダイオード（ＬＥＤ）１１’、
ｌ ２および１３は回転符号円板１４、固定符号板１５
を通して受光素子１６へ光を放射する。A schematic configuration of a conventionally used pulse encoder is shown in FIG. Light emitting diode (LED) 11',
l 2 and 13 are a rotating code disk 14 and a fixed code plate 15
The light is emitted to the light receiving element 16 through the light receiving element 16.
図においてＡ相ＬＥＤ１２はＢ相ＬＥＤ１３と電なるた
めＬＥＤ１３のみ示されている。回転符号円板１４はそ
の平面図が第２図に示さ１する。回転符号円板１４は材
料としてガラス等のｆ７．門な物質が用いられる。図に
おける回転符号円板１４の斜線部分にはクローム等の不
透明な祠料が蒸着逓れる。なお放射状に配列された周辺
の斜線部分は簡略化のため一部記載が省略されているが
、全周にわたって存在する。破ルＪで示された円ね１、
回転符号円板１４に対するＬＥＤの位置を示す。In the figure, only the LED 13 is shown because the A-phase LED 12 is connected to the B-phase LED 13. The rotation code disk 14 is shown in plan view in FIG. The rotation code disk 14 is made of f7. made of glass or the like. A unique substance is used. An opaque abrasive material such as chrome is deposited on the hatched portion of the rotation code disk 14 in the figure. Note that some of the shaded areas around the radially arranged areas are omitted for the sake of brevity, but they exist over the entire circumference. The circle indicated by broken J1,
The position of the LED relative to the rotation code disk 14 is shown.
第３図には固定符号板１５の平面図が示される。A plan view of the fixed code plate 15 is shown in FIG.
固定符号板１５も回転符号円板１４と同４）Ｊ２に−ｉ
ｆラス等の透明な材料が用いられ、斜線部にはクローム
等が蒸着されでいる。破勝て示されｆこ円はＬＥＤの対
応する位置を示す。The fixed code plate 15 is also the same as the rotating code disk 14 4) -i to J2
A transparent material such as f-lass is used, and chrome or the like is vapor-deposited in the shaded areas. The broken circle indicates the corresponding position of the LED.
受光素子１６はＺ 、Ｚ 、Ａ、Ａ、 Ｂ＊−ｊ：ひＢ
の６個で構成される。受光素子ＺはＺ相ＬＥＤＩＩから
の光を回転符号円板１４および固定符号板１５の窓４１
全通して受光する。受光素子ＺはＬ Ｅ Ｄｌｌからの
光を回転符号円板１４＃−よび固定符号板１５の窓４２
を通して受光する。受光素子ＡばＬＥＤ１２からの光を
回転符号円板１４および固定符号板１５の窓４．−３を
通して受ツＣする。受光素子ＡはＬＥＤ１２からの光を
回転符号円板１４および固定符号＆１５の窓４４全通し
て受光する。The light receiving element 16 is Z, Z, A, A, B*-j: HiB
It consists of 6 pieces. The light receiving element Z receives the light from the Z-phase LED II through the window 41 of the rotating code disk 14 and the fixed code plate 15.
Receives light throughout. The light receiving element Z transmits the light from the L E Dll to the rotating code disk 14#- and the window 42 of the fixed code plate 15.
Receives light through the The light receiving element A transmits light from the LED 12 to the window 4 of the rotary code disk 14 and the fixed code plate 15. Receive C through -3. The light receiving element A receives the light from the LED 12 through the rotation code disk 14 and the window 44 with the fixed code &15.
受光素子ＢはＬＥＤ１３からの元を回転符号円板１４２
よひ固定符号板１５の窓４５を通して受光する。受光素
子ＢはＬＥＤ１３からの元金回転符号円板１４および固
定符号板１５の窓４６を通して受光する。受光素子とし
てはフォトセル等が用いられる。The light receiving element B converts the element from the LED 13 into a rotation code disk 142.
The light is received through the window 45 of the fixed code plate 15. The light receiving element B receives light from the LED 13 through the window 46 of the principal rotation code disk 14 and the fixed code plate 15. A photocell or the like is used as the light receiving element.
上述のような構成において、回転符号円′）ｄｉ１４が
シャフト１７を介して回転すると、受光素子Ａ。In the above-described configuration, when the rotation code circle ′) di14 rotates via the shaft 17, the light receiving element A.
Ａ、ＢＪ＞よひＢの受光タイミングは第４図の斜線部で
示されるような時間関係となる。図中矢印の方向が円板
の中心点方向に相当する。The light reception timing of A, BJ>yohiB has a time relationship as shown by the shaded area in FIG. The direction of the arrow in the figure corresponds to the direction of the center point of the disk.
第５図（１）には回転符号円板１４が回転した時の受光
素子２の２５図（２）には受光素子２の出力成形が示さ
れる。これら２つの出力が増幅４３３に印ノ用され（第
７図、；３）参照）、その差が求められ、第５図（３１
に示される波形の出力が得られ２相出力イ１号となる。FIG. 5(1) shows the output shaping of the light receiving element 2 when the rotation code disk 14 rotates, and FIG. 25(2) shows the output shaping of the light receiving element 2. These two outputs are applied to the amplification 433 (see Figure 7, 3)), and the difference between them is determined.
An output with the waveform shown in is obtained, resulting in two-phase output No. 1.
第６図（１１、（２）、（３）および（４）にはそれぞ
れ受光素子Ａ、Ａ、ＢおよびＢの出力波形が示される。FIG. 6 (11, (2), (3) and (4)) show the output waveforms of the light receiving elements A, A, B and B, respectively.
受光素子Ａの出力と受光素子Ａの出力の差（Ａ−Ａ）と
、受光素子Ｂの出力と受光素子Ｂの出力の差（Ｂ−Ｂ）
の間の位相−詠は第６図（５）に示される。The difference between the output of light-receiving element A and the output of light-receiving element A (A-A), and the difference between the output of light-receiving element B and the output of light-receiving element B (B-B)
The phase between is shown in FIG. 6(5).
第７図には受光素子の出力を増幅する回路が示される。FIG. 7 shows a circuit for amplifying the output of the light receiving element.
受光素子Ａの出力と受光素子Ａの出力はその差が増ｌ１
ｇ器３１で増幅されて人相出力信号となｐ（第７図（１
））、受光素子Ｂの出力と受光兼子Ｂの出力はその差が
増幅器３２で増幅されてＢ相出力信号となる（第７図（
２））。図におけるＲは抵抗を示す。。The difference between the output of light receiving element A and the output of light receiving element A increases l1
It is amplified by the g unit 31 and becomes a physiognomic output signal (Fig. 7 (1)
)), the difference between the output of light-receiving element B and the output of light-receiving element B is amplified by the amplifier 32 and becomes a B-phase output signal (Fig. 7 (
2)). R in the figure indicates resistance. .
第８図には、理想的なパルスエンコーダのＡ相、Ｂ相お
よびＺ相の出力信号波形が示される。Ｚ相出力信号は回
転符号円板１４の１回１紙について１個の・ぐルス全出
力する。Ａ相とＢ相の出力信号の間には９０度の位相差
があ殴、かつ人相出力信号およびＢ相出力化号共対称矩
形阪でなければなら −ない。すなわち因において、Ｌ
Ａ＝ＬＡおよびＬＢ＝ＬＢ であることが必要である。FIG. 8 shows the A-phase, B-phase, and Z-phase output signal waveforms of an ideal pulse encoder. The Z-phase output signal outputs one pulse for each sheet of rotation code disk 14 at a time. There must be a 90 degree phase difference between the A-phase and B-phase output signals, and both the human face output signal and the B-phase output signal must be symmetrical rectangular shapes. That is, in the cause, L
It is necessary that A=LA and LB=LB.
上述のような理想的な波形を得るためには受光束子の出
力信号においてＶ、＝ＶＴ（第６図（１）および（２）
参照）、およびＶ、＝ＶＭ （第６図（３１および（
４）＃照）でなければならない。２相においても、安定
した出力を得るためには第５図におけるｖｚ−■習Ｆ＃
Ａ係が成立つことが必要である。ナオ第５図および第６
図ニオケる■２、ＶＭ、Ｖ、、■ス、ＶＢおよび７石は
各波形の変動幅の中央から基準電圧（０■）迄の′乱臣
である。しかし、実際にはＬＥＤの発する光が第９図の
ように互いに干渉し、本来照射すべき相の符号以外の部
分をＬＥＤの光が透過してしまうため、ＬＥＤを単純に
等しい位置（高さ、傾斜ンに設置するだけでは所望の出
力が得られないという問題点がある。従って、従来はＬ
ＥＤの位置を第１０図のように調整したり、互いのＬＥ
Ｄ’を離すことにより解決しようとした。In order to obtain the ideal waveform as described above, the output signal of the light receiving bundler must be V, = VT (see (1) and (2) in Figure 6).
), and V, = VM (see Fig. 6 (31 and (
4) It must be #sho). In order to obtain stable output even in 2-phase, vz−■X F# in Fig. 5.
It is necessary that Section A be established. Nao Figures 5 and 6
In the figure, 2, VM, V, , 2, VB, and 7 stones are fluctuations from the center of the fluctuation range of each waveform to the reference voltage (0). However, in reality, the light emitted by the LEDs interferes with each other as shown in Figure 9, and the LED light passes through parts other than the sign of the phase that should be irradiated. Therefore, simply placing the LEDs at the same position (height There is a problem that the desired output cannot be obtained simply by installing the L
Adjust the position of the ED as shown in Figure 10, or
I tried to solve the problem by releasing D'.
しかし、受光素子の出力信号を観察しながらＬＥＤの位
置調整を行うのは多大の時間を要し、互いのＬ Ｅ Ｄ
’ｋ 離ｊ’のもｉｊルスエンコーダの太きさや部品
配置の上から制約があった。However, it takes a lot of time to adjust the position of the LED while observing the output signal of the light receiving element.
There were also restrictions on the width of the ij pulse encoder and the arrangement of parts.
本発明の目的は、前述の従来形の）＋ルスエンコーダに
おける問題点にかんがみ、発光源で必るＬＥＤにマスク
を伺加するという着想に基づき、複数個のＬＥＤ相互に
おける光の干渉を防止し、それによシ主として、Ｉ、Ｅ
Ｄの取付位置の面単な調整でＡ相とＢ相の出力の位相差
が所定の値をとシ得るようにし、その結果ＬＥＤ取付時
に必要な調整時間全太幅に減少し、ＬＥＤの配置に関す
る設計を容易にすることにある。The purpose of the present invention is to prevent light interference between a plurality of LEDs based on the idea of adding a mask to the LEDs that are necessary for the light emitting source, in view of the problems with the conventional () + Lux encoder mentioned above. , and mainly I, E
By simply adjusting the mounting position of D, the phase difference between the A-phase and B-phase outputs can be maintained at a predetermined value.As a result, the adjustment time required when installing the LED is completely reduced, and the LED placement The objective is to facilitate the design of
本発明においては、複数個の発光ダイオード全光源とし
、回転符号円板および固定符号板を透過した光を受光素
子によＱ受光する構造のノ（ルスエノコーダにおいて、
該発光ダイオードに互いに光が干渉しないようにマスク
全付加すること全特徴トスルパルスエンコーダが提供さ
れる。In the present invention, a plurality of light emitting diodes are used as total light sources, and a light receiving element receives Q light after passing through a rotating code disk and a fixed code plate.
A full-featured tossle pulse encoder is provided in which the light emitting diodes are fully masked to prevent light from interfering with each other.
本発明の一実施例としてのパルスエンコーダの’！’７
１成全示す図が第１１図に示される。この／クルレスエ
ンコーダはＺ相ＬＥＤＩ １、Ａ相ＬＥＤ１２、Ｂ＠Ｌ
ＥＤ１３、回転符号円板１４、固〆符号也１５、受光素
子１６および各ＬＥＤに伺助口さｎたマスク２５を具備
する。谷ＬＥＤにマスク２５が付加されること以外は従
来形のパルスエンコーダと同一であジ、既（Ｃ説明され
ているので説明を省略する。マスク２５はＬＥＤの外形
に合せて作られ、その横１所面は円形であり、縦断面は
第１２図に示す工うな筒形の形状である。筒形の内径は
ほぼＬＥＤの外径に等しく、長きは、光が側方へ波数す
るのを防止するためＬＥＤの長さよジやや長くする必要
がある。マスク２５の材料には光を通さない不透明な物
質が用いられる。A pulse encoder as an embodiment of the present invention! '7
A diagram showing the complete structure is shown in FIG. This/cleless encoder has 1 Z-phase LED, 12 A-phase LEDs, and B@L
It is equipped with an ED 13, a rotation code disk 14, a fixed code 15, a light receiving element 16, and a mask 25 with openings for each LED. It is the same as a conventional pulse encoder except that a mask 25 is added to the valley LED, and the explanation is omitted as it has already been explained. The mask 25 is made to match the external shape of the LED, and the One side is circular, and the vertical cross section is a cylindrical shape as shown in Figure 12.The inner diameter of the cylindrical shape is approximately equal to the outer diameter of the LED, and the longer length is longer so that the wave number of the light changes to the side. To prevent this, it is necessary to make the length of the LED a little longer.The mask 25 is made of an opaque substance that does not transmit light.
本実施例においては、ＬＥＤの位置ｍ＝に多くの時間を
必要としないで、Ａ相出力とＢ相出カ間の位相差を９０
度にすることができ、従来行っていた位相合せが不必要
となる。′またＡ相出力およびＢ相出力における出力波
形の対称性も調整が容易となる。In this embodiment, the phase difference between the A-phase output and the B-phase output can be adjusted to 90° without requiring much time to adjust the LED position m=.
This eliminates the need for conventional phase matching. 'Also, the symmetry of the output waveforms in the A-phase output and the B-phase output can be easily adjusted.
本発明によれば、鎮敢例のＬＥＤ相互に２ける光の干渉
を防止し、それにょシ主として、ＬＥＤの取付位置の簡
単なＡ整でＡ ；Ｉ目とＢ相の出方の位相差が所定の値
をと役得るようにし、その結果ＬＥＤ取付時に必要な調
整時間全大幅に減少し、ＬＥＤＯｆ）配置４に関する設
計金谷筋にすることができる。According to the present invention, it is possible to prevent light from interfering with each other in the two LEDs, and to do so, the phase difference between the output of A; can serve as a predetermined value, so that the total adjustment time required during LED installation is significantly reduced and the design for the LED arrangement 4 can be made more flexible.
第１図は従来形のパルスエンコーダの概略の構成を示す
図、第２図は第１図のパルスエンコーダにおける回転符
号円板の平面図、第：３図は′ｆ、１図のｉＲパルスエ
ンコーダおける固定符号板の平ｍ１図、第４図は第１図
のノぐルスエンコーダにおける受光素子の受光タイミン
グを示す図、第５図はＺ相の信号波形を示す波形図、第
６図は人相およびＢ相の信号成形を示す波形図、第７図
はＡ相、Ｂ相および２相の各信号の増幅回路の回路図、
第８図はＡ相、Ｂ相および２相出力の理想的な位相ＩＡ
係を示す波形図、第９図は従来形ノ々ルスエンコーダに
おけるＬ Ｅ ＤＯ元の相互干渉を説明する図、第１０
図ハ従来形・千ルスエンコーダにおけるＬＥＤの位置の
調整を説明する図、第１１図は本発明の一実施例として
のパルスエンコーダの構成を示す図、および第１２図は
第１１図のパルスエンコーダのＬＥＤのマスクの縦断面
図である。
１１・・・Ｚ相ＬＥＤ、１２・・・Ａ相ＬＥＤ、１３・
・Ｂ相ＬＥＤ、１４・・・回転符号円板、１５・・・固
定符号板、１６ ・受光素子、１７・・・シャフト、２
１・・・２相党光素子、２２・・・Ａ相受光素子、２３
・・・Ｂ相愛光素子、２５・・・マスク、３１，３２．
３３・・・増幅器。
特許出願人
ファナソク株式会社
特許出願代理人
弁理士 青 木 朗
弁理士 西 舘 和 之
弁理士 山 口 昭 之
第１図
第２図
第３図
迅
＋’３゛１２
第４図
第５図
第７図
河１８図
第９図
２１ ２３ ンノ
第１０図
￥、 コ１１１１
〉＞１２図Fig. 1 is a diagram showing the general configuration of a conventional pulse encoder, Fig. 2 is a plan view of the rotation code disk in the pulse encoder of Fig. 1, Fig. 3 is 'f, and iR pulse encoder of Fig. 1. Fig. 4 is a diagram showing the light reception timing of the light receiving element in the Nogle encoder of Fig. 1, Fig. 5 is a waveform diagram showing the Z-phase signal waveform, and Fig. 6 is a diagram showing the signal waveform of the Z phase. A waveform diagram showing phase and B phase signal shaping, FIG.
Figure 8 shows the ideal phase IA of A phase, B phase and 2-phase output.
FIG. 9 is a diagram illustrating the mutual interference of the L E DO source in a conventional Nords encoder, and FIG.
Figure C is a diagram illustrating the adjustment of the position of the LED in a conventional thousand pulse encoder, Figure 11 is a diagram showing the configuration of a pulse encoder as an embodiment of the present invention, and Figure 12 is the pulse encoder of Figure 11. FIG. 11...Z-phase LED, 12...A-phase LED, 13.
・B phase LED, 14... Rotation code disk, 15... Fixed code plate, 16 ・Light receiving element, 17... Shaft, 2
DESCRIPTION OF SYMBOLS 1... 2-phase optical element, 22... A-phase light receiving element, 23
. . . B soai optical element, 25 . . . Mask, 31, 32.
33...Amplifier. Patent applicant Fanasoku Co., Ltd. Patent application agent Akira Aoki Patent attorney Kazuyuki Nishidate Patent attorney Akira Yamaguchi Figure 1 Figure 2 Figure 3 Jin+'3゛12 Figure 4 Figure 5 Figure 7 Figure 18 Figure 9 21 23 Figure 10 ￥, Ko1111 〉＞Figure 12
Claims (1)
び固定符号板を透過した元を受光素子により受光する構
泣のノやルスエンコーグにおいて、該発光ダイオードに
互いに光が干渉しないようにマスクを付加することを特
徴とする・ぐルスエンコーダ。In a light-emitting encoder that uses a plurality of light-emitting diodes as a light source and receives the light transmitted through a rotating code disk and a fixed code plate by a light-receiving element, a mask is added to the light-emitting diodes to prevent the light from interfering with each other. The Gurus encoder is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1746883A JPS59143918A (en) | 1983-02-07 | 1983-02-07 | Pulse encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1746883A JPS59143918A (en) | 1983-02-07 | 1983-02-07 | Pulse encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59143918A true JPS59143918A (en) | 1984-08-17 |
Family
ID=11944847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1746883A Pending JPS59143918A (en) | 1983-02-07 | 1983-02-07 | Pulse encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59143918A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01131299U (en) * | 1988-03-01 | 1989-09-06 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57120815A (en) * | 1980-12-19 | 1982-07-28 | Ibm | Sequential rotary encoder |
-
1983
- 1983-02-07 JP JP1746883A patent/JPS59143918A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57120815A (en) * | 1980-12-19 | 1982-07-28 | Ibm | Sequential rotary encoder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01131299U (en) * | 1988-03-01 | 1989-09-06 |
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