GB1492261A - Displacement encoding methods and apparatus - Google Patents

Displacement encoding methods and apparatus

Info

Publication number
GB1492261A
GB1492261A GB18748/75A GB1874875A GB1492261A GB 1492261 A GB1492261 A GB 1492261A GB 18748/75 A GB18748/75 A GB 18748/75A GB 1874875 A GB1874875 A GB 1874875A GB 1492261 A GB1492261 A GB 1492261A
Authority
GB
United Kingdom
Prior art keywords
signal
excl
significant bit
scale
pair
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
Application number
GB18748/75A
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.)
Societe dOptique Precision Electronique et Mecanique SOPELEM SA
Original Assignee
Societe dOptique Precision Electronique et Mecanique SOPELEM SA
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 Societe dOptique Precision Electronique et Mecanique SOPELEM SA filed Critical Societe dOptique Precision Electronique et Mecanique SOPELEM SA
Publication of GB1492261A publication Critical patent/GB1492261A/en
Expired 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
    • G01D5/12—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
    • G01D5/24404—Interpolation using high frequency signals
    • 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
    • H03M1/26—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with weighted coding, i.e. the weight given to a digit depends on the position of the digit within the block or code word, e.g. there is a given radix and the weights are powers of this radix

Abstract

1492261 Coded-scale position digitizers SOC D'OPTIQUE PRECISION ELECTRONIQUE ET MECHANIQUE 5 May 1975 [15 May 1974] 18748/75 Heading H3H In a coded-scale position digitizer, a signal with half the cyclic length of the least significant signal derived from the scale is obtained by logically combining the latter with a further signal of the same cyclic length but relatively displaced, this further signal being obtained by logical combination using at least one pair of leading and lagging signals derived from the scale and of greater significance. The resolution of the system is thus doubled. In a pure binary system, one such pair of leading and lagging signals is used, being that of the next-to-least-significant bit, derived from respective tracks or sensors, the EXCL-OR of these signals being EXCL-ORed with the inverse of the signal from the least significant bit track to obtain the signal with half the cyclic length mentioned. In a decimal binary-coded system, two pairs are used with the OR of their respective EXCL-OR replacing the EXCL-OR of the one pair of the purebinary embodiment, the pairs for the mostsignificant and next-to-least-significant bits being used. (In this embodiment, the segment length for the most-significant bit equals that for the next-toleast-significant bit). Conventional lead/lag selection is performed. Variations in light intensity can be compensated for by obtaining each track signal as the difference between the outputs of two sensors half a period apart.
GB18748/75A 1974-05-15 1975-05-05 Displacement encoding methods and apparatus Expired GB1492261A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7416864A FR2271709B1 (en) 1974-05-15 1974-05-15

Publications (1)

Publication Number Publication Date
GB1492261A true GB1492261A (en) 1977-11-16

Family

ID=9138877

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18748/75A Expired GB1492261A (en) 1974-05-15 1975-05-05 Displacement encoding methods and apparatus

Country Status (7)

Country Link
BE (1) BE829129A (en)
CH (1) CH606996A5 (en)
DE (1) DE2521733A1 (en)
FR (1) FR2271709B1 (en)
GB (1) GB1492261A (en)
IT (1) IT1055596B (en)
NL (1) NL7505580A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4383317A (en) * 1980-10-30 1983-05-10 Bei Electronics, Inc. Shaft angle encoder having a circuit for synthesizing a skipped track output signal
DE3809569A1 (en) * 1988-03-22 1989-10-05 Frankl & Kirchner POSITION SENSOR

Also Published As

Publication number Publication date
CH606996A5 (en) 1978-11-30
FR2271709A1 (en) 1975-12-12
BE829129A (en) 1975-11-17
NL7505580A (en) 1975-11-18
DE2521733A1 (en) 1975-11-20
IT1055596B (en) 1982-01-11
FR2271709B1 (en) 1978-08-04

Similar Documents

Publication Publication Date Title
US2715678A (en) Binary quantizer
US3271688A (en) Frequency and phase controlled synchronization circuit
GB1284641A (en) Improvements relating to measuring apparatus
GB1123554A (en) Method of numerical coding
US3798557A (en) Interpolation of sinusoidal signals
GB1210390A (en) Analog to digital encoder
GB1361813A (en) Digital readout devices
GB1314437A (en) Numerical display systems
GB1276053A (en) Improvements in or relating to digital measurements
GB1492261A (en) Displacement encoding methods and apparatus
US3729621A (en) Apparatus for measuring or indicating movement by combined encoding and counting
FR2331772A1 (en) Photoelectric length measurement system - performs interpolation and derives control signals for interpolation by reference comparison (OE15.1.77)
JPS6465415A (en) Multiple rotation type absolute value encoder
GB1451681A (en) Positioning apparatus
GB1340072A (en) Apparatus for signalling the angular displacement of a body about an axis
GB1355999A (en) Dimension comparator for machine tools
US3678399A (en) Method of and apparatus for electronically obtaining the argument of a complex function
SU1124282A1 (en) Transformer from binary code to binary-coded decimal code of angular units
SU938396A1 (en) Analog-digital converter
GB1327219A (en) Digital to analogue converter
ES318469A1 (en) Binary to multilevel conversion by combining redundant information signal with transition encoded information signal
RU2017156C1 (en) Method for measuring speed of shaft rotation and device for implementation of said method
SU601630A1 (en) Phase-code converter
SU1282170A1 (en) Device for reading graphic information
SU807352A1 (en) Graphic information reading-out device

Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee