JP4705363B2 - 反射性の円筒形表面を利用したエンコーダ - Google Patents
反射性の円筒形表面を利用したエンコーダ Download PDFInfo
- Publication number
- JP4705363B2 JP4705363B2 JP2004340480A JP2004340480A JP4705363B2 JP 4705363 B2 JP4705363 B2 JP 4705363B2 JP 2004340480 A JP2004340480 A JP 2004340480A JP 2004340480 A JP2004340480 A JP 2004340480A JP 4705363 B2 JP4705363 B2 JP 4705363B2
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- reflective
- encoder
- drum
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- Expired - Fee Related
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- 230000003287 optical effect Effects 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
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
- G01D5/3473—Circular or rotary encoders
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Description
[1] 軸(21)により特性付けられる円筒形の表面を有し、前記軸に対して垂直方向に延在する法線を持つ表面を有するドラム(22)と、
前記円筒形表面上に交互に配された複数の反射性及び非反射性のストライプを有する第一のトラックと、
前記法線に対して角度を有するように前記ストライプを照明する第一の光源(26)と、
前記ドラムがフォトデテクタに対して移動した場合に前記反射性のストライプから反射された前記光源からの光を受光するように配置された第一のフォトデテクタ(27)と
を具備し、前記反射性のストライプは前記光源の画像を前記第一のフォトデテクタ上に形成するものであることを特徴とするエンコーダ。
[2] 前記光源が平行光線を放射するものであることを特徴とする上記[1]に記載のエンコーダ。
[3] シャフトが回転した場合に前記ドラムが前記軸を中心として回転するものであることを特徴とする上記[1]に記載のエンコーダ。
[4] 前記シャフトと前記軸とが同軸上にあることを特徴とする上記[3]に記載のエンコーダ。
[5] 前記円筒形表面が前記トラックと前記軸との間にあることを特徴とする上記[1]に記載のエンコーダ。
[6] 前記トラックが前記円筒形表面と前記軸との間にあることを特徴とする上記[1]に記載のエンコーダ。
[7] 前記円筒形表面上に交互に配置された複数の反射性及び非反射性のストライプを有する第二のトラックと、前記第二のトラックの前記ストライプを前記法線に対して角度を有するように照明する第二の光源と、前記第二のトラックの前記反射性のストライプから反射された前記光源からの光を受光するように配置された第二のフォトデテクタを更に具備し、前記ドラムが前記第一、第二のフォトデテクタに対して移動することを特徴とする上記[1]に記載のエンコーダ。
[8] 前記第二のトラックの前記反射性ストライプの幅が、前記第一のトラックの前記反射性ストライプの幅と異なることを特徴とする上記[7]に記載のエンコーダ。
21 軸
22 ドラム
23 非反射性領域(ストライプ)
25 デテクタモジュール
26 第一の光源
27 第一のフォトデテクタ
30 エンコーダ
31 ドラム
32 非反射性の符号化ストライプ
Claims (8)
- 軸により特性付けられる円筒形の表面を有し、該軸に対して垂直な法線を有する表面を有するドラムと、
前記円筒形の表面上に円周方向に沿って交互に配置された複数の反射性及び非反射性のストライプを有する第一のトラックと、
前記法線に対して角度を有するように前記ストライプを照明する第一の光源と、
前記ドラムが回転した場合に前記反射性のストライプから反射された前記光源からの光を受光するように配置された第一のフォトデテクタと、
を具備し、
前記反射性のストライプの画像は、ある倍率で前記第一のフォトデテクタ上に形成され、該倍率は、前記ドラムからの前記第一の光源及び前記第一のフォトデテクタまでの距離と、前記反射性のストライプによって形成されるミラー表面の焦点距離と、に基づいて決定され、前記ドラムと前記第一のフォトデテクタとの間の距離を調節することにより、異なる分解能に対して対応可能であることを特徴とする、エンコーダ。 - 前記光源が平行光線を放射するものであることを特徴とする、請求項1に記載のエンコーダ。
- シャフトが回転した場合に前記ドラムが前記軸を中心として回転するものであることを特徴とする、請求項1に記載のエンコーダ。
- 前記シャフトと前記軸とが同軸上にあることを特徴とする、請求項3に記載のエンコーダ。
- 前記円筒形の表面が前記第一のトラックと前記軸との間にあることを特徴とする、請求項1に記載のエンコーダ。
- 前記第一のトラックが前記円筒形の表面と前記軸との間にあることを特徴とする、請求項1に記載のエンコーダ。
- 前記円筒形の表面上に円周方向に沿って交互に配置された複数の反射性及び非反射性のストライプを有する第二のトラックと、
前記第二のトラックの前記ストライプを前記法線に対して角度を有するように照明する第二の光源と、
前記第二のトラックの前記反射性のストライプから反射された前記光源からの光を受光するように配置された第二のフォトデテクタと、
を更に具備し、
前記ドラムは前記第一、第二のフォトデテクタに対して移動することを特徴とする、請求項1に記載のエンコーダ。 - 前記第二のトラックの前記反射性ストライプの幅が、前記第一のトラックの前記反射性ストライプの幅と異なることを特徴とする、請求項7に記載のエンコーダ。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/725,696 US7265336B2 (en) | 2003-12-01 | 2003-12-01 | Encoder utilizing a reflective cylindrical surface |
US10/725696 | 2003-12-01 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2005164588A JP2005164588A (ja) | 2005-06-23 |
JP2005164588A5 JP2005164588A5 (ja) | 2007-07-12 |
JP4705363B2 true JP4705363B2 (ja) | 2011-06-22 |
Family
ID=34620320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004340480A Expired - Fee Related JP4705363B2 (ja) | 2003-12-01 | 2004-11-25 | 反射性の円筒形表面を利用したエンコーダ |
Country Status (4)
Country | Link |
---|---|
US (1) | US7265336B2 (ja) |
JP (1) | JP4705363B2 (ja) |
CN (1) | CN100510646C (ja) |
DE (1) | DE102004048237A1 (ja) |
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-
2004
- 2004-10-04 DE DE102004048237A patent/DE102004048237A1/de not_active Ceased
- 2004-11-25 JP JP2004340480A patent/JP4705363B2/ja not_active Expired - Fee Related
- 2004-12-01 CN CNB2004100912992A patent/CN100510646C/zh not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
DE102004048237A1 (de) | 2005-06-30 |
US20050116153A1 (en) | 2005-06-02 |
US7265336B2 (en) | 2007-09-04 |
CN1624427A (zh) | 2005-06-08 |
CN100510646C (zh) | 2009-07-08 |
JP2005164588A (ja) | 2005-06-23 |
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