DE1773636A1 - Process for the compensation of disturbance variables in the acquisition of measured values - Google Patents

Process for the compensation of disturbance variables in the acquisition of measured values

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Publication number
DE1773636A1
DE1773636A1 DE19681773636 DE1773636A DE1773636A1 DE 1773636 A1 DE1773636 A1 DE 1773636A1 DE 19681773636 DE19681773636 DE 19681773636 DE 1773636 A DE1773636 A DE 1773636A DE 1773636 A1 DE1773636 A1 DE 1773636A1
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DE
Germany
Prior art keywords
signals
signal
difference
amplitude
sum
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
Application number
DE19681773636
Other languages
German (de)
Other versions
DE1773636B2 (en
DE1773636C3 (en
Inventor
Kurt Dipl-Ing Vogelbruch
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.)
VOGELBRUCH KURT DIPL ING
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VOGELBRUCH KURT DIPL ING
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Application filed by VOGELBRUCH KURT DIPL ING filed Critical VOGELBRUCH KURT DIPL ING
Priority to DE19681773636 priority Critical patent/DE1773636C3/en
Publication of DE1773636A1 publication Critical patent/DE1773636A1/en
Publication of DE1773636B2 publication Critical patent/DE1773636B2/en
Application granted granted Critical
Publication of DE1773636C3 publication Critical patent/DE1773636C3/en
Expired legal-status Critical Current

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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
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/02—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F5/00—Show stands, hangers, or shelves characterised by their constructional features
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Technology Law (AREA)
  • Optical Transform (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Description

L i te r a t u rL i te r a t u r

- 17- 17th

[i] GRAVE, H.F.:[i] GRAVE, H.F .:

[2~] MAIER, H.: [2 ~] MAIER, H .:

Elektrische Messung nichtelektrischer Größen. ,Akademische Verlagsgesellschaft Geest & Portig KG, Leipzig 1962.Electrical measurement of non-electrical quantities. , Academic Publishing Society Geest & Portig KG, Leipzig 1962.

Magnetbandgeräte für Messungen in Fa.hrzeugen und Flugkörpern Elektronik H 8., S.Magnetic tape devices for measurements in vehicles and missiles electronics H 8., p.

ROHRBACH, CH.:ROHRBACH, CH .:

[V] SCHOLZ, CH.:[V] SCHOLZ, CH .:

[V] VOGELBRUCH, K.:[V] BIRD BREAK, S .:

Handbuch für elektrisches Messen mechanischer Größen. VDI-Verlag G.m.b.H., Düsseldorf I967.Manual for electrical measurement of mechanical quantities. VDI-Verlag G.m.b.H., Düsseldorf I967.

Magnetbandspeiehertechnik. VEB Verlag Technik Berlin 1968, S. k2. Magnetic tape storage technology. VEB Verlag Technik Berlin 1968, p. K2.

Ein Gegentaktverfahren zur Stabilisierung des Meßempfi'ndlichkeits- und des Ubertragungsfaktors bei der Erfassung und Speicherung analoger Meßvzerte. Dissertation T.H. Aachen 197O (Tafel / Engl).A push-pull process to stabilize the measurement sensitivity and the transfer factor in the acquisition and storage of analog measurement values. Dissertation T.H. Aachen 197O (plate / Engl).

T0 9 818/0659T0 9 818/0659

Claims (1)

PatentansprücheClaims 1. Verfahren zur Kompensation von Störeinflüssen bei der Erfassung und Speicherung analoger Meßwerte, dadurch gekennzeichnet, daß von zwei dui'ch die Meßgröße zueinander gegenphasig amplitudenmodulierten Signalen (den sof*-. Gegentaktsignalen), die gleichermaßen in ihrer Amplitude durch Störeinflüsse multiplikativ verfälscht werden, durch Quotientenbildung aus Differenz und Summe das störunteeinflußte Meßsignal gewonnen wird; treten die Störeinwirkungen "bereits bei der Meßwerterfassung auf, so muß die Meßgeberanordnuiig; unmittelbar die beiden Gegentaktsignale liefern, wogegen bei erst während der Heß-1. Procedure to compensate for interfering influences in the acquisition and Storage of analog measured values, characterized in that of two by means of the measured variable amplitude-modulated signals in phase opposition to one another (the sof * -. push-pull signals), which are alike in their amplitude are falsified multiplicatively by interfering influences, by forming the quotient of the difference and the sum the unaffected Measurement signal is obtained; the interference occurs "already at the Measured value acquisition, the Meßgeberanordnuiig must; immediately the deliver both push-pull signals, whereas only during the Hess v. er !.übertragung bzw. -Speicherung wirksam werdenden Störeinflüssen auch eine vorherige Umwandlung eines ursprünglich vorliegenden (unverfälschten) Eintaktsignals in zvei zueinander geoenphasig modulierte Signale möglich ist.v. The transmission or storage of interfering influences that become effective also a previous conversion of an originally available (unadulterated) Single-ended signal modulated in two geophase to each other Signals is possible. 2. Koinpensations-Grundschema 1 nach Anspruch 1., dadurch gekennzeichnet, diiß das Trägersignal S_, welches vom Meßsignal S„ gegenphasig amplitudenmoduliert wird, entweder ein reines Gleichsignal oder aber ein Wechselsignal mit hinreichend großem Gleichanteil ist und dementsprechend die Differenz- und Summenbildung der beiden gleichermaßen amplitudenverfälschten Gegentpktsignale ohne vorherige Frequenzselektic-n und Demodulation bzw. Gleichrichtung durchgeführt werden kann.2. Coinpensations basic scheme 1 according to claim 1, characterized in that that is, the carrier signal S_, which is amplitude-modulated in phase opposition by the measurement signal S " is either a pure direct signal or an alternating signal with a sufficiently large direct component and accordingly the formation of the difference and the sum of the two equally amplitude-falsified counter-point signals without prior frequency selectivity and demodulation or rectification can be performed. 3. kompensp,tions-Grundschema 2 nach Anspruch 1., dadurch gekennzeichnet, daß das Trafersignal S~, welches vom Meßsignal S„ gegenphasig amplitudenmoduliert wird, ein Wechselsignal ist, vorzugsweise von der harmonischen Form £ä «cosOt, so daß vor der Differenz- und Summenbildung der beiden gleichermaßen amplitudenverfälschten Gegenta.ktsignale eine .Demodulation bzA*. Gleichrichtung erforderlich ist.3. Kompensp, tion basic scheme 2 according to claim 1, characterized in that that the transformer signal S ~, which is amplitude-modulated in phase opposition by the measurement signal S " is an alternating signal, preferably of the harmonic form £ ä «cosOt, so that before the difference and sum formation of the two equally amplitude-falsified counter-feedback signals .Demodulation bzA *. Rectification is required. k, Kompensations-Grundschema 3 nach Anspruch 1., dadurch gekennzeichnet, daß durch (Ihs Mei;signal S.. zvei Trägerv;echselsignale verschiedener Frequenz, vorzugsweise von der harmonischen Form s\p*cosQ.t und s„«cosQpt, zueinander gegenphasig pmplituaenmoduliert v/erden und dementsprechend die beiden amplitudenverfälschten Gegentt'ktsign-"le vor dor Differenz- und Humsienbi !dung mittels g?;eigneter ■ Bnndpäöse voiioirifliider getrennt und anschließend demoduliert bsv. gleichgerichtet werden. k, basic compensation scheme 3 according to claim 1, characterized in that by (Ihs Mei; signal S .. two carrier nerve; echselsignale different frequencies, preferably of the harmonic form s \ p * cosQ.t and s "" cosQpt, to each other in opposite phase pmplitude-modulated and accordingly the two amplitude-falsified counter signals before the difference and humenous formation are separated by means of suitable bond pairs voiioirifliider and then demodulated or rectified. Α'λ.: P 17 15 t1,(,.6-^2 Α'λ .: P 17 15 t1, (,. 6- ^ 2 1 O 9 8 1 8 / η ρ F 9 n-n η^β:?^1 O 9 8 1 8 / η ρ F 9 n-n η ^ β:? ^ 5· Schaltungsanordnung nach Anspruch 1., A:i3pruch 2. und dem in k. dargestellten Ausführungs-Beispiel 1., dadurch gekennzeichnet, daß bei einem zur optisch-elektrischen Wegmessung "benutzten Photo-Differenzsensor die störende Abhängigkeit der Ausgangssignale von der Temperatur, von der Helligkeit und Färbtemperatur der Beleuchtungsquelle(n) sowie von Alterungs- und Ermüdungserscheinungen, der Meßgeberanordnung durch Bildung des Quotienten p.us Differenz und Summe der beiden vom Meßsensor gelieferten Einzelsignale beseitigt wird; diese Einzelsignale können ggf. vor der Differenz- und Summenbildung noch geeignet aufbereitet werden, z.B. durch Entlogarithmieren.5 · Circuit arrangement according to claim 1., A: i3 claim 2. and that in k. Embodiment 1 shown, characterized in that in a photo-difference sensor used for optical-electrical path measurement "the disruptive dependence of the output signals on the temperature, on the brightness and color temperature of the lighting source (s) and on aging and fatigue, the Sensor arrangement is eliminated by forming the quotient p.us difference and sum of the two individual signals supplied by the measuring sensor; these individual signals can, if necessary, be processed before the difference and sum formation, e.g. by de-logarithmizing. 6. Schaltungsanordnung nach Anspruch 1., Anspruch 3· und dem in 5· dargestellten Ausführungs-Beispiel 2., dadurch gekennzeichnet, daß bei einem zur Meßwertübertragung benutzten Drehtransformator die störende Abhängigkeit des Ausgangssignals bzw. der Ausgangssignale von dem Kopplungsfaktor zwischen rotierenden und feststehendem Teil und damit von dem nur mit verhältnismäßig großem mechanischen Aufwand hinreichend konstant zu haltenden Abstand zwischen Rotor und Stator durch Quotientenbildung aus Differenz und Summe zweier geeigneter Gegentaktsignale beseitigt wird.6. Circuit arrangement according to Claim 1, Claim 3 · and that shown in FIG. 5 · Embodiment 2., characterized in that in a rotary transformer used for measured value transmission, the interfering Dependence of the output signal or the output signals on the Coupling factor between rotating and stationary part and thus of the distance between rotor and stator, which can only be kept constant with a relatively high mechanical effort The formation of a quotient from the difference and the sum of two suitable push-pull signals is eliminated. 7· Schaltungsanordnung nach Anspruch 1., Anspruch k. und dem in 6. dargelegten Ausführungsbeispiel 3·» dadurch gekennzeichnet, daß bei der Magnetbandspeicherung analoger Meßwerte das zu speichernde Meßsignal zwei frequenzverschiedene (vorzugsweise harmonische) Trägersignale gegenphasig amplitudenmoduliert werden, die Summe dieser beiden Gegentaktsignale auf einer Bandspur gespeichert wird, bei der Wiederfe gäbe (Ausspeicherung) mittels geeigneter Bandpässe die beiden gleichermaßen multiplikativ störbeeinflußten Gegentaktsignale voneinander getrennt und dann demoduliert (gleichgerichtet) werden und anschließend durch Quotientenbildung aus deren Differenz und Summe das störunbeeinflußte Meßsignal erhalten wird, so daß dieses vorgeschlagene Prinzip die Vorteile des bekannten Direktverfahrens (geringer mechanischer und elektrischer Aufwand, hohe Bandbreite) und des ebenfalls bekannten Frequenzmodulationsverfahrens (hohe Wiedergabegenauigkeit, Speichermöglichkeit für Gleichsignele) erstmalig in einem Verfahren vereint, ohne deren Nachteile (hohe Pegeleinbrüche, keine Gleichsig-, nalspeicherung bzw. hoher mechanischer und elektrischer Aufwand, geringe Speicherbandbreite) aufzuveisen.7 · Circuit arrangement according to claim 1, claim k. and the embodiment 3 set out in 6, characterized in that when analog measurement values are stored on magnetic tape, the measurement signal to be stored is amplitude-modulated in two frequency-different (preferably harmonic) carrier signals in antiphase; Withdrawal) by means of suitable bandpass filters, the two equally multiplicative interference-affected push-pull signals are separated from each other and then demodulated (rectified) and then the interference-unaffected measurement signal is obtained by forming the quotient of their difference and sum, so that this proposed principle has the advantages of the known direct method (less mechanical and electrical Effort, high bandwidth) and the also known frequency modulation method (high reproduction accuracy, storage option for identical signals) combined in one method for the first time without their disadvantages (i.e. No level drops, no DC or signal storage or high mechanical and electrical effort, low storage bandwidth). Αζ·ίΡ 17 75 ' ' OADO-- Αζ · ίΡ 17 75 '' OADO-- 109818/06^0 ~~—-109818/06 ^ 0 ~~ ---
DE19681773636 1968-06-15 1968-06-15 Procedure for the compensation of disturbance variables in the acquisition of measured values Expired DE1773636C3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19681773636 DE1773636C3 (en) 1968-06-15 1968-06-15 Procedure for the compensation of disturbance variables in the acquisition of measured values

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Application Number Priority Date Filing Date Title
DE19681773636 DE1773636C3 (en) 1968-06-15 1968-06-15 Procedure for the compensation of disturbance variables in the acquisition of measured values

Publications (3)

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DE1773636A1 true DE1773636A1 (en) 1971-04-29
DE1773636B2 DE1773636B2 (en) 1974-06-12
DE1773636C3 DE1773636C3 (en) 1975-01-16

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DE1773636B2 (en) 1974-06-12
DE1773636C3 (en) 1975-01-16

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Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee