DE3242565C1 - Circuit arrangement for analog evaluation of the signals transmitted by digital rotational speed sensors - Google Patents
Circuit arrangement for analog evaluation of the signals transmitted by digital rotational speed sensorsInfo
- Publication number
- DE3242565C1 DE3242565C1 DE19823242565 DE3242565A DE3242565C1 DE 3242565 C1 DE3242565 C1 DE 3242565C1 DE 19823242565 DE19823242565 DE 19823242565 DE 3242565 A DE3242565 A DE 3242565A DE 3242565 C1 DE3242565 C1 DE 3242565C1
- Authority
- DE
- Germany
- Prior art keywords
- integrator
- circuit arrangement
- standard
- capacitor
- time constant
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general
- G01P3/4805—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general by using circuits for the electrical integration of the generated pulses
Abstract
Description
Wie bekannt, ist die Entladefunktion eines Integriergliedes, hier also des Kondensators 8, nicht linear. Das bedeutet im vorliegenden Fall folgendes: Bei sehr großen Impulsabständen (untere Grenzfrequenz) ist die Restamplitude am Kondensator 8 bei Eintreffen eines As is known, the discharge function of an integrator is here so the capacitor 8, not linear. In the present case, this means the following: With very large pulse intervals (lower limit frequency) the residual amplitude is am Capacitor 8 when one arrives
- Leerseite - Folgeimpulses höher als es bei einer linearen Entladungsfunktion der Fall wäre. Dies ist für manche Fälle ohne Belang, nämlich bei geringen Genauigkeitsanforderungen und/oder bei nur schmalen, zu erfassenden Drehzahlbereichen. Diese Linearitätsabweichung ist jedoch in anderen Fällen störend. Um sie zu beseitigen, ist das zweite Integrierglied, 9, vorgesehen, welches hier einen reinen Verzögerungseffekt ausübt und prinzipiell auch durch andere, wenn auch aufwendigere, Zeitverzögerungsglieder ersetzt werden könnte. Die Funktion des Integriergliedes 9 wird nachfolgend erläutert.- blank page - Follow-up pulse higher than it is with a linear discharge function would be the case. In some cases this is irrelevant, namely with low accuracy requirements and / or with only narrow ones to be recorded Speed ranges. This linearity deviation is disturbing in other cases. To eliminate them, the second integrator, 9, is provided, which is here exerts a pure delaying effect and in principle also through others, albeit more complex, time delay elements could be replaced. The function of the integrator 9 is explained below.
Wie weiter oben erwähnt, findet bei langen Impulsabständen der Folgeimpuls eine höhere Restamplitude vor als es bei einer linearen Entladefunktion der Fall wäre. Dies ist in den F i g. 2 und 3 grafisch erläutert Dabei sind in F i g. 2 Verhältnisse aufgezeichnet, die denen bei größtem Impulsabstand, also der unteren, zu erfassenden Drehzahl real entsprechen. Mit 20 ist die Schaltzeit des Schaltgliedes 14 des Momentanwertspeichers 13 bezeichnet. 21 stellt die Entladeflanke des Kondensators 8 des Integriergliedes 6 dar. Die Mittelwertlinie schließlich ist mit 22 bezeichnet Wie ersichtlich, liegt diese Mittelwertlinie höher als es bei linearem Verlauf der Entladeflanke 21 der Fall wäre. As mentioned above, the following pulse takes place with long pulse intervals a higher residual amplitude than is the case with a linear discharge function were. This is shown in FIGS. 2 and 3 explained graphically. 2 ratios recorded those with the greatest pulse spacing, i.e. the lower, to be recorded Real speed. At 20 is the switching time of the switching element 14 of the instantaneous value memory 13 designated. 21 represents the discharge edge of the capacitor 8 of the integrator 6. Finally, the mean line is denoted by 22. As can be seen, it is located this mean line is higher than in the case of the linear course of the discharge edge 21 of the Case would be.
Der Grund hierfür liegt darin, daß beim erneuten Schließen des Schaltgliedes 14, wie bei 24 angedeutet, der Folgeimpuls eine höhere Restamplitude 23 vorfindet, als es bei einer linearen Entladeflanke der Fall wäre.The reason for this is that when the switching element is closed again 14, as indicated at 24, the following pulse finds a higher residual amplitude 23, than would be the case with a linear discharge edge.
Es findet mithin eine Vor-Anhebung statt Bei der oberen Drehzahlgrenze hingegen folgen die einzelnen Impulse so kurz aufeinander daß die Entladezeit des Kondensators 8 nur kurz ist und das betreffende Anfangsstück der Entladekurve 21 als linear angesehen werden kann. Eine Verfälschung tritt daher in jenem Fall nicht ein.There is therefore a pre-increase at the upper speed limit however, the individual pulses follow one another so quickly that the discharge time of the Capacitor 8 is only short and the relevant starting part of the discharge curve 21 can be viewed as linear. A falsification therefore does not occur in that case a.
In F i g. 3 sind die Verhältnisse während der Schließzeit des Schaltgliedes 14 zeitgedehnt herausgezeichnet. Wäre das zweite Integrierglied, 9, nicht vorhanden, so würde die Aufladeflanke 25 dem Momentanwertspeicher 13 zugeführt werden. Demzu; folge ergäbe sich die verfälschte Mittelwertlinie 22, die mit der Mittelwertlinie 22 aus F i g. 2 übereinstimmt. In Fig. 3 are the conditions during the closing time of the switching element 14 drawn out over time. If the second integrator, 9, were not available, so the charging edge 25 would be fed to the instantaneous value memory 13. In addition; the result would be the falsified mean line 22, the one with the mean line 22 from FIG. 2 matches.
Über das zweite Integrierglied, 9, welches gegenüber dem Integrierglied 6 eine wesentliche kleinere Integrationszeitkonstante besitzt, wird dem Momentanwertspeicher 13 die Aufladeflanke 26 zugeführt Wie ersichtlich, ist diese gegenüber der Aufladeflanke 25 nach rechts zeitverschoben. Dadurch kann während der Schaltzeit 24 nur ein geringerer Energieinhalt auf den Kondensator 16 übertragen werden. Hierdurch wird die weiter oben erläuterte Nichtlinearität kompensiert Es resultiert mithin nunmehr die richtige Mittelwertlinie 27.About the second integrator, 9, which opposite the integrator 6 has a significantly smaller integration time constant, becomes the instantaneous value memory 13, the charging edge 26 is supplied. As can be seen, this is opposite the charging edge 25 time shifted to the right. As a result, during the switching time 24, only a smaller one can Energy content can be transferred to the capacitor 16. This will continue the The non-linearity explained above is compensated for. The correct one therefore now results Average line 27.
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Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823242565 DE3242565C1 (en) | 1982-11-18 | 1982-11-18 | Circuit arrangement for analog evaluation of the signals transmitted by digital rotational speed sensors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823242565 DE3242565C1 (en) | 1982-11-18 | 1982-11-18 | Circuit arrangement for analog evaluation of the signals transmitted by digital rotational speed sensors |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3242565C1 true DE3242565C1 (en) | 1984-04-26 |
Family
ID=6178393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19823242565 Expired DE3242565C1 (en) | 1982-11-18 | 1982-11-18 | Circuit arrangement for analog evaluation of the signals transmitted by digital rotational speed sensors |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3242565C1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3430711A1 (en) * | 1984-05-09 | 1985-11-14 | Telefunken electronic GmbH, 7100 Heilbronn | Frequency-voltage converter |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2155839B2 (en) * | 1971-11-10 | 1974-03-28 | Knorr-Bremse Gmbh, 8000 Muenchen |
-
1982
- 1982-11-18 DE DE19823242565 patent/DE3242565C1/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2155839B2 (en) * | 1971-11-10 | 1974-03-28 | Knorr-Bremse Gmbh, 8000 Muenchen |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3430711A1 (en) * | 1984-05-09 | 1985-11-14 | Telefunken electronic GmbH, 7100 Heilbronn | Frequency-voltage converter |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |