FR2271540A2 - Electronic vernier device with slotted disc - has non-radial slots and two phototransistors on radius to give incremental signals - Google Patents

Electronic vernier device with slotted disc - has non-radial slots and two phototransistors on radius to give incremental signals

Info

Publication number
FR2271540A2
FR2271540A2 FR7403718A FR7403718A FR2271540A2 FR 2271540 A2 FR2271540 A2 FR 2271540A2 FR 7403718 A FR7403718 A FR 7403718A FR 7403718 A FR7403718 A FR 7403718A FR 2271540 A2 FR2271540 A2 FR 2271540A2
Authority
FR
France
Prior art keywords
phototransistors
radius
disc
radial slots
slotted disc
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
Application number
FR7403718A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOUDIER PIERRE FR
Original Assignee
BOUDIER PIERRE FR
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BOUDIER PIERRE FR filed Critical BOUDIER PIERRE FR
Priority to FR7403718A priority Critical patent/FR2271540A2/en
Publication of FR2271540A2 publication Critical patent/FR2271540A2/en
Pending legal-status Critical Current

Links

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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)

Abstract

An electronic vernier device is used in conjunction with rotary drives to measure linear displacements of machine-tool elements. The device has a slotted disc and two phototransistors (2, 3) which are excited by reflected or by direct light from a luminous source. The slots are inclined at an angle to the radius of the disc and the two phototransistors are aligned on a radius of the disc (1). The value of the angle of the slots is determined from the pitch of screw drive and the distance separating the two phototransistors (2, 3) such that the signals from the transistors are displaced and this displacement corresponds to an increment of the screw pitch.
FR7403718A 1974-02-05 1974-02-05 Electronic vernier device with slotted disc - has non-radial slots and two phototransistors on radius to give incremental signals Pending FR2271540A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7403718A FR2271540A2 (en) 1974-02-05 1974-02-05 Electronic vernier device with slotted disc - has non-radial slots and two phototransistors on radius to give incremental signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7403718A FR2271540A2 (en) 1974-02-05 1974-02-05 Electronic vernier device with slotted disc - has non-radial slots and two phototransistors on radius to give incremental signals

Publications (1)

Publication Number Publication Date
FR2271540A2 true FR2271540A2 (en) 1975-12-12

Family

ID=9134461

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7403718A Pending FR2271540A2 (en) 1974-02-05 1974-02-05 Electronic vernier device with slotted disc - has non-radial slots and two phototransistors on radius to give incremental signals

Country Status (1)

Country Link
FR (1) FR2271540A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0042179A2 (en) * 1980-06-17 1981-12-23 Tokyo Kogaku Kikai Kabushiki Kaisha Encoder
EP0794410A2 (en) * 1996-03-04 1997-09-10 Alps Electric Co., Ltd. Code plate of optical rotary encoder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0042179A2 (en) * 1980-06-17 1981-12-23 Tokyo Kogaku Kikai Kabushiki Kaisha Encoder
EP0042179A3 (en) * 1980-06-17 1983-06-22 Tokyo Kogaku Kikai Kabushiki Kaisha Encoder
EP0794410A2 (en) * 1996-03-04 1997-09-10 Alps Electric Co., Ltd. Code plate of optical rotary encoder
EP0794410A3 (en) * 1996-03-04 1999-09-15 Alps Electric Co., Ltd. Code plate of optical rotary encoder

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