KR910006691A - Optical rotary encoder - Google Patents

Optical rotary encoder Download PDF

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Publication number
KR910006691A
KR910006691A KR1019900013932A KR900013932A KR910006691A KR 910006691 A KR910006691 A KR 910006691A KR 1019900013932 A KR1019900013932 A KR 1019900013932A KR 900013932 A KR900013932 A KR 900013932A KR 910006691 A KR910006691 A KR 910006691A
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KR
South Korea
Prior art keywords
signal
pulse
reference position
peak level
angle
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Application number
KR1019900013932A
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Korean (ko)
Inventor
가즈오 야마구찌
요시 구로사와
세이이찌 사또오
아쯔시 우에다
마사미 마쓰무라
Original Assignee
후까미 아끼라
가부시끼가이샤 오프텍크 디디·메루꼬·라보라토리
하다노 고오이찌
다이이찌 덴꼬오 가부시끼가이샤
시끼 모리야
미쓰비시 덴끼 가부시끼가이샤
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Publication date
Priority claimed from JP23462889A external-priority patent/JPH0399223A/en
Priority claimed from JP23462989A external-priority patent/JPH0399221A/en
Application filed by 후까미 아끼라, 가부시끼가이샤 오프텍크 디디·메루꼬·라보라토리, 하다노 고오이찌, 다이이찌 덴꼬오 가부시끼가이샤, 시끼 모리야, 미쓰비시 덴끼 가부시끼가이샤 filed Critical 후까미 아끼라
Publication of KR910006691A publication Critical patent/KR910006691A/en

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    • 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
    • H03M1/308—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding incremental with additional pattern means for determining the absolute position, e.g. reference marks
    • 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
    • G01D5/12—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 using electric or magnetic means
    • G01D5/244—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 using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—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 using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2454—Encoders incorporating incremental and absolute signals
    • G01D5/2455—Encoders incorporating incremental and absolute signals with incremental and absolute tracks on the same encoder
    • 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
    • G01D5/12—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 using electric or magnetic means
    • G01D5/244—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 using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/249—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 using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using pulse code
    • G01D5/2492—Pulse stream

Abstract

내용 없음No content

Description

광로터리 엔코더Optical rotary encoder

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명의 한 실시예를 나타내는 플로우챠트.1 is a flowchart illustrating one embodiment of the present invention.

제2도는 (a)~(b)는 펄스신호의 출력파형을 낱내는 그래프.2 is a graph showing output waveforms of pulse signals.

제3도는 콘넥터의 1예를 나타내는 단면도.3 is a cross-sectional view showing an example of a connector.

Claims (5)

펄스스케일의 회전에 의해 그 회전각에 따른 각도신호와, 0도를 표시하는 기준위치신호가 광펄스 신호로서 출력되고 이들 각도신호와 기준위치신호에 의거하여 펄스스케일의 회전각을 검출하도록 이루어진 광로터리 엔코더에있어서, 상기 펄스스케일에 각도 신호를 출력하는 가도 검출용 코드패턴과, 기준위치신호를 출력하는 위치검출용 코드패턴이 그 원주방향을 따라 동심적으로 형성되고, 각 코드패턴에 광을 조사하는 발광소자와, 각 코드패턴에서 출력된 2종류의 광펄스 신호가 중첩되어 입력되는 수광소자를 구비한 제어장치에, 상기 수광소자로 광전변환된 펄스신호를 기준전압과 비교하여 각도신호 및 기준위치 신호의 「0」「1」을 판별하는 한쌍의 신호처리부가 설치되고, 각도신호의 「0」「1」을 판별하는 신호처리부의 기준전압이, 각도신호의 펄스만 입력될 경우의 피크레벨 보다 낮게 설정됨과 동시에 기준위치 신호의「0」「1」을 판별하는 신호처리부의 기준전압이, 각도신호와 기준위치신호가 동시에 입력될 경우의 피크레벨보다 낮고,또 각도신호의 펄스만 입력될 경우의 피크레벨보다 높게 설정되고, 해당 각 신호처리부에 의해 상기 수광소자에서 출력된 펄스신호가 각도신호와 기준위치신호로 분리되도록 이루어져 있는 것을 특징으로 하는 광로터리 엔코더.By rotating the pulse scale, an angle signal corresponding to the rotation angle and a reference position signal indicating 0 degrees are output as optical pulse signals, and an optical signal configured to detect the rotation angle of the pulse scale based on these angle signals and the reference position signal. In a rotary encoder, a code detection pattern pattern for outputting an angular signal to the pulse scale and a position detection code pattern for outputting a reference position signal are formed concentrically along the circumferential direction, and light is applied to each code pattern. A control device comprising a light emitting element to be irradiated and a light receiving element to which two kinds of optical pulse signals outputted from each code pattern are superimposed and inputted, wherein an angle signal and A pair of signal processing units for discriminating "0" and "1" of the reference position signal are provided, and the reference voltages of the signal processing unit for discriminating "0" and "1" of the angle signal are each The reference voltage is set lower than the peak level when only the pulse of the signal is input, and the reference voltage of the signal processor for discriminating "0" and "1" of the reference position signal is higher than the peak level when the angle signal and the reference position signal are simultaneously input. It is set to a lower than the peak level when only the pulse of the angle signal is input, and the pulse signal output from the light receiving element by the respective signal processing section is configured to be separated into the angle signal and the reference position signal Rotary encoder. 펄스스케일의 회전에 의해 그 회전각에 따른 각도신호와, 0도를 표시하는 기준위치신호가 광펄스 신호로서 출력되고 이들 각도신호와 기준위치신호에 의거하여 펄스스케일의 회전각을 검출하도록 이루어진 광로터리 엔코더에있어서, 상기 펄스스케일의 원주방향을 따라 형성된 코드패턴의 투공부(透孔夫) 또는 광반사부 중, 기준위치신호를 출력하는 특정한 투공부 또는 광반사부를 제외한 그 밖의 투공부 또는 광반삽가 투과광(透過光) 또는 반사광을 감소시키도록 형성되어, 상기 특정 투공부 또는 광반사부에서는 각도신호와 기준위치신호가 포함된 피크레벨이 높은 광펄스 신호가 출력되고, 그 밖의 투공부 또는 광반사부에서는 각도신호 만으로 이루어지는 피크레밸이 낮은 광펄스신호가 출력되고, 해당 광펄스 신호를 광전변환하여 얻어진 펄스신호에 의거하여 피크레벨의 높낮이에 관계없이 펄스입력의 유무에 의해 각도신호의 「1」「0」을 판별하는 신호처리부와, 높은 피크레밸의 펄스의 입력 유무에 의해 기준위치신호의「1」「0」을 판별하는 신호처리를 구비한 것을 특징으로 하는 광로터리 엔코더.By rotating the pulse scale, an angle signal corresponding to the rotation angle and a reference position signal indicating 0 degrees are output as optical pulse signals, and an optical signal configured to detect the rotation angle of the pulse scale based on these angle signals and the reference position signal. In the rotary encoder, other perforations or light except for the perforations or light reflecting portions for outputting a reference position signal among the perforations or light reflecting portions of the code pattern formed along the circumferential direction of the pulse scale. The reflection is formed so as to reduce transmitted light or reflected light, so that the specific perforation part or the light reflection part outputs an optical pulse signal having a high peak level including an angle signal and a reference position signal, and the other perforation part or light. The reflector outputs an optical pulse signal having a low peak level consisting only of an angle signal, and is obtained by photoelectric conversion of the optical pulse signal. A signal processing unit for determining "1" or "0" of the angular signal by the presence or absence of a pulse input based on the signal regardless of the height of the peak level, and "1" of the reference position signal by the presence or absence of a high peak level pulse input. An optical rotary encoder comprising signal processing for discriminating "0". 제2항에 있어서, 상기 투공부중, 기준위치신호를 출력하는 특정 투공부를 제외한 그 밖의 투공부에 감쇠막이 증착되어 이루어지는 것을 특징으로 하는 광로터리 엔코더.The optical rotary encoder according to claim 2, wherein an attenuating film is deposited on the other perforating part except for the specific perforating part which outputs a reference position signal among the perforating parts. 제2항에 있어서, 기준위치신호를 출력하는 특정 투공부 또는 광반사부가 펄스스케일의 지경방향으로 길게 형성되고, 그 밖의 투공부 또는 광반사부가 짧게 형성되어, 상기 각 투공부 또는 광반사부에서 투과 또는 반사되는 광량을 변화시킴으로써 피크레벨을 변화시키도록 이루어진 것을 특징으로 하는 광로터리 엔코더.3. The specific aperture portion or light reflection portion for outputting the reference position signal is formed long in the radial direction of the pulse scale, and the other aperture portion or light reflection portion is formed short, and the respective aperture portions or light reflection portions An optical rotary encoder, characterized in that for changing the peak level by changing the amount of light transmitted or reflected. 제2항에 있어서, 상기 신호처리부가 광펄스 신호를 광전변환하는 수광소자에 접속되고, 해당 수광소자에 의해 얻어진 펄스신호를, 그 피크레벨보다 낮게 설정된 기준전압과 비교함으로써「1」「0」을 판별하도록 이루어지고 가도신호용 신호처리부는 그 기준전압이 낮은 쪽의피크레벨 보다 더욱 낮게 설정되고, 기준위치신호용 신호처리부는 그 기준전압이 높은쪽의 피크레벨과 낮은 쪽의 피크레밸의 중간에 설정되고, 해당 각신호용 신호처리부는 그 기준전압이 높은쪽의 피크레벨과 낮은 쪽의 피크레밸의 중간에 설정되고, 해당 각신호 처리부에 의해 상기 수광소자 에서 출력된 펄스신호가 각도신호와 기준위치신호로 분리되도록 이루어진 것을 특징으로 하는 광로터리 엔코더.3. The signal processing unit according to claim 2, wherein the signal processing unit is connected to a light receiving element that photoelectrically converts an optical pulse signal, and the pulse signal obtained by the light receiving element is compared with a reference voltage set lower than its peak level to " 1 " And the signal signal processing section for the reference signal is set lower than the peak level of the lower side, and the reference position signal signal processing section is set between the peak level of the higher reference voltage and the peak level of the lower side. The signal processor for each signal is set at the middle of the peak level of the high reference voltage and the peak level of the low signal, and the pulse signal output from the light receiving element by the respective signal processor is an angle signal and a reference position signal. Optical rotary encoder, characterized in that made to be separated into. ※ 참고사항 : 최초출원 내요에 의하여 공개하는 것임.※ Note: The disclosure is subject to the initial application.
KR1019900013932A 1989-09-12 1990-09-04 Optical rotary encoder KR910006691A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP23462889A JPH0399223A (en) 1989-09-12 1989-09-12 Optical rotary encoder
JP23462989A JPH0399221A (en) 1989-09-12 1989-09-12 Optical rotary encoder
JP1-234628 1989-09-12
JP1-234629 1989-09-12

Publications (1)

Publication Number Publication Date
KR910006691A true KR910006691A (en) 1991-04-29

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Application Number Title Priority Date Filing Date
KR1019900013932A KR910006691A (en) 1989-09-12 1990-09-04 Optical rotary encoder

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DE (1) DE4028792A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5336884A (en) * 1992-07-01 1994-08-09 Rockwell International Corporation High resolution optical hybrid absolute incremental position encoder
FR2720881B1 (en) * 1994-06-01 1996-07-05 Commissariat Energie Atomique Encoder to measure relative movements between two objects.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2185359B (en) * 1986-01-10 1990-01-17 Rosemount Ltd Optical displacement transducer
DE3623449A1 (en) * 1986-07-11 1988-01-14 Siemens Ag Arrangement for obtaining angle signals
JPS6474411A (en) * 1987-09-16 1989-03-20 Yamaha Corp Position detector

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