GB909644A - Method and device for the linear interpolation of fine divisions - Google Patents
Method and device for the linear interpolation of fine divisionsInfo
- Publication number
- GB909644A GB909644A GB5755/59A GB575559A GB909644A GB 909644 A GB909644 A GB 909644A GB 5755/59 A GB5755/59 A GB 5755/59A GB 575559 A GB575559 A GB 575559A GB 909644 A GB909644 A GB 909644A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulses
- diffraction gratings
- fringe patterns
- sawtooth
- feb
- 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.)
- Expired
Links
- 239000003990 capacitor Substances 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
-
- 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
-
- 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
- G01D5/38—Forming the light into pulses by diffraction gratings
-
- 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
- H03M1/20—Increasing resolution using an n bit system to obtain n + m bits
Abstract
909,644. Electric selective signalling systems. BUDNICK, G. A. A. Feb. 19, 1959 [Feb. 24, 1958], No. 5755/59. Class 40 (1). In a system for measuring relative displacement using MoirÚ fringes produced by slightly inclined diffraction gratings extra pulses are interpolated between successive fringe patterns in order to give greater precision. In Fig. 1, three photo-cells 5, 6, 7 are arranged between a pair of adjacent fringe patterns in such a way that as the diffraction gratings are moved a grating width relative to each other one of the fringe patterns moves successively over the three cells, thereby producing three pulses and increasing the resolution normally obtained by a pair of diffraction gratings by a factor of three. Where the diffraction gratings are part of a system so designed that the gratings should be moving at a constant relative speed, the extra pulses can be inserted electronically. Thus by using pulses produced by sensing the fringe patterns with a single cell to trigger a sawtooth generator, Fig. 3, and then applying the resulting sawtooth to a circuit such as Fig. 5, which comprises a potential divider of equal resistors 19 and a number of diodes 17 joined to their connections, the resulting succession of pulses across a number of capacitors 21 as the diodes successively conduct upon the arrival of each sawtooth function as interpolated pulses and by being counted can be used to ensure that the relative speed is maintained constant.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB47955A DE1059671B (en) | 1958-02-24 | 1958-02-24 | Processes and devices for linear interpolation of fine graduations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB909644A true GB909644A (en) | 1962-10-31 |
Family
ID=6968424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5755/59A Expired GB909644A (en) | 1958-02-24 | 1959-02-19 | Method and device for the linear interpolation of fine divisions |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH388640A (en) |
| DE (1) | DE1059671B (en) |
| FR (1) | FR1220375A (en) |
| GB (1) | GB909644A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1202012B (en) * | 1958-11-07 | 1965-09-30 | Wenczler & Heidenhain Patentve | Photoelectric device for the precise determination of the position of a division feature |
| DE1189736B (en) * | 1960-09-01 | 1965-03-25 | Ferranti Ltd Electrical & Gene | Measuring device for determining the size and direction of the relative movement of an object |
| DE1209308B (en) * | 1960-10-14 | 1966-01-20 | Wenezler & Heidenhain | Device for determining the position of an individual marking |
-
1958
- 1958-02-24 DE DEB47955A patent/DE1059671B/en active Pending
-
1959
- 1959-02-18 CH CH6975559A patent/CH388640A/en unknown
- 1959-02-19 GB GB5755/59A patent/GB909644A/en not_active Expired
- 1959-02-23 FR FR787465A patent/FR1220375A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1220375A (en) | 1960-05-24 |
| DE1059671B (en) | 1959-06-18 |
| CH388640A (en) | 1965-02-28 |
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