ATE441T1 - PROCEDURE FOR DIGITAL INTERPOLATION OF A PERIOD OF A THREE-PHASE ANALOG SIGNAL. - Google Patents

PROCEDURE FOR DIGITAL INTERPOLATION OF A PERIOD OF A THREE-PHASE ANALOG SIGNAL.

Info

Publication number
ATE441T1
ATE441T1 AT79101775T AT79101775T ATE441T1 AT E441 T1 ATE441 T1 AT E441T1 AT 79101775 T AT79101775 T AT 79101775T AT 79101775 T AT79101775 T AT 79101775T AT E441 T1 ATE441 T1 AT E441T1
Authority
AT
Austria
Prior art keywords
analog signal
components
phase
interpolation
zone
Prior art date
Application number
AT79101775T
Other languages
German (de)
Inventor
Albert Dipl.-El.-Ing.Eth Guenin
Original Assignee
Contraves Ag
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 Contraves Ag filed Critical Contraves Ag
Application granted granted Critical
Publication of ATE441T1 publication Critical patent/ATE441T1/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/38—Electric signal transmission systems using dynamo-electric devices
    • G08C19/46—Electric signal transmission systems using dynamo-electric devices of which both rotor and stator carry windings
    • G08C19/48—Electric signal transmission systems using dynamo-electric devices of which both rotor and stator carry windings being the type with a three-phase stator and a rotor fed by constant-frequency ac, e.g. selsyn, magslip
    • 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
    • G01D5/243—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 the phase or frequency of ac
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Analogue/Digital Conversion (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

The value of three components of an analog signal are compared with zero and in two's compared with one another. Each possible combination of the comparison result, within the range of possible phase argument values of the analog signal, has correlated therewith a respective zone, whereby there is formed a coarse interpolation of a period of the analog signal into phase zones. The components are digitized and there are selected the components having the smallest (X), the intermediate (Y) and the largest (Z) absolute value. There are formed the digital functions H=Y-X and K=Z-Y+X. Each possible combination (H, K) is correlated to a respective predetermined number of steps of the phase argument within the zone, thereby producing a fine interpolation of the zone into steps. Preferably, at the beginning there is substracted from each analog component one-third of the sum of the three components. The method is especially employed for the interpolation of three-phase measuring signals of photocells during the angular measurement in for flight path measurement theodolites.
AT79101775T 1978-06-26 1979-06-05 PROCEDURE FOR DIGITAL INTERPOLATION OF A PERIOD OF A THREE-PHASE ANALOG SIGNAL. ATE441T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH692978 1978-06-26
EP79101775A EP0006492B1 (en) 1978-06-26 1979-06-05 Method of digital interpolation of one period of a three-phased analog signal

Publications (1)

Publication Number Publication Date
ATE441T1 true ATE441T1 (en) 1981-12-15

Family

ID=4317257

Family Applications (1)

Application Number Title Priority Date Filing Date
AT79101775T ATE441T1 (en) 1978-06-26 1979-06-05 PROCEDURE FOR DIGITAL INTERPOLATION OF A PERIOD OF A THREE-PHASE ANALOG SIGNAL.

Country Status (6)

Country Link
US (1) US4255743A (en)
EP (1) EP0006492B1 (en)
JP (1) JPS556291A (en)
AT (1) ATE441T1 (en)
CA (1) CA1104260A (en)
DE (1) DE2961428D1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4340881A (en) * 1980-06-12 1982-07-20 United Technologies Corporation Universal analog signal to digital signal interface
JPS5730337A (en) * 1980-07-30 1982-02-18 Nec Corp Formation of surface protecting film for semiconductor
JPS57103333A (en) * 1980-12-18 1982-06-26 Toshiba Corp Manufacture of semiconductor device
JPS5816548A (en) * 1981-07-22 1983-01-31 Toshiba Corp Manufacture of semiconductor device
JPS603126A (en) * 1983-06-21 1985-01-09 Nec Corp Formation of insulating layer
US4890105A (en) * 1987-09-17 1989-12-26 Sperry Marine Inc. Step data processor for 180X and 90X compass synchro data
JPH0339475A (en) * 1989-07-05 1991-02-20 Hitachi Electron Eng Co Ltd Method for strengthening formed oxidized film in plasma cvd device
DE102007042073B4 (en) 2007-09-05 2018-07-12 Delta Electronics, Inc. Apparatus and method for angle calculation for a three-phase optical encoder
DE102014109745B3 (en) 2014-07-11 2015-11-05 Helmholtz-Zentrum Berlin Für Materialien Und Energie Gmbh Method and device for determining a motor position

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310798A (en) * 1963-10-01 1967-03-21 Wayne George Corp Analog to digital optical encoder
CH407569A (en) 1963-12-04 1966-02-15 Contraves Ag Digital evaluation device for constantly changing measured variable signals
US3533097A (en) * 1965-04-26 1970-10-06 Whittaker Corp Digital automatic synchro converter
CH498373A (en) 1967-02-23 1970-10-31 Contraves Ag Arrangement with several photocells
CH499091A (en) 1968-03-15 1970-11-15 Contraves Ag Digital angle measuring device
AT339062B (en) 1975-11-11 1977-09-26 Rieder Heinz METHOD OF LENGTH MEASUREMENT

Also Published As

Publication number Publication date
CA1104260A (en) 1981-06-30
US4255743A (en) 1981-03-10
JPS556291A (en) 1980-01-17
EP0006492A1 (en) 1980-01-09
EP0006492B1 (en) 1981-11-25
DE2961428D1 (en) 1982-01-28

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Legal Events

Date Code Title Description
REN Ceased due to non-payment of the annual fee