FR2335825A1 - Location of exact position of mobile element - using light source, measurement scale and mobile position reader - Google Patents
Location of exact position of mobile element - using light source, measurement scale and mobile position readerInfo
- Publication number
- FR2335825A1 FR2335825A1 FR7538832A FR7538832A FR2335825A1 FR 2335825 A1 FR2335825 A1 FR 2335825A1 FR 7538832 A FR7538832 A FR 7538832A FR 7538832 A FR7538832 A FR 7538832A FR 2335825 A1 FR2335825 A1 FR 2335825A1
- Authority
- FR
- France
- Prior art keywords
- mobile
- location
- light source
- slits
- reader
- 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.)
- Granted
Links
- 238000005259 measurement Methods 0.000 title 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
- G01D5/366—Particular pulse shapes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
A location scale (1) is placed on the fixed element parallel to the path of the mobile element (2) and on at least part of the fixed element containing the position to be located, this location scale comprising a series of transparent bands A0, A1, A2...An of equal width b and separated by equal intervals. The device has a position reader which moves with the mobile element and contains a light detector and a mask on which is a series of slits A10, A11,....A1n separated by the same intervals. When this mask moves along the scale, at any moment, more than k bands of the location scale are superimposed on k slits, k being much less than n. The intensity of light passing through the bands and the slits measured and a locations signal is derived which contains a high amplitude pulse at the position of super-position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7538832A FR2335825A1 (en) | 1975-12-18 | 1975-12-18 | Location of exact position of mobile element - using light source, measurement scale and mobile position reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7538832A FR2335825A1 (en) | 1975-12-18 | 1975-12-18 | Location of exact position of mobile element - using light source, measurement scale and mobile position reader |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2335825A1 true FR2335825A1 (en) | 1977-07-15 |
FR2335825B1 FR2335825B1 (en) | 1978-07-13 |
Family
ID=9163904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7538832A Granted FR2335825A1 (en) | 1975-12-18 | 1975-12-18 | Location of exact position of mobile element - using light source, measurement scale and mobile position reader |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2335825A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0094481A2 (en) * | 1982-05-19 | 1983-11-23 | Dr. Johannes Heidenhain GmbH | Opto-electrical measuring-device |
-
1975
- 1975-12-18 FR FR7538832A patent/FR2335825A1/en active Granted
Non-Patent Citations (1)
Title |
---|
IBM TECHNICAL DISCLOSURE BULLETIN, VOLUME 18, NO. 1, JUIN 1975, PAGE 229) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0094481A2 (en) * | 1982-05-19 | 1983-11-23 | Dr. Johannes Heidenhain GmbH | Opto-electrical measuring-device |
EP0094481A3 (en) * | 1982-05-19 | 1986-02-05 | Dr. Johannes Heidenhain Gmbh | Opto-electrical measuring-device |
Also Published As
Publication number | Publication date |
---|---|
FR2335825B1 (en) | 1978-07-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |