DE2326311A1 - OSCILLATION ANEMOMETER - Google Patents
OSCILLATION ANEMOMETERInfo
- Publication number
- DE2326311A1 DE2326311A1 DE19732326311 DE2326311A DE2326311A1 DE 2326311 A1 DE2326311 A1 DE 2326311A1 DE 19732326311 DE19732326311 DE 19732326311 DE 2326311 A DE2326311 A DE 2326311A DE 2326311 A1 DE2326311 A1 DE 2326311A1
- Authority
- DE
- Germany
- Prior art keywords
- transmitter
- detector
- circuit
- anemometer
- oscillation
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/10—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/18—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Description
Polska Akadenia Eauk - Zaklad Hechanikl PL 755^ Gorotworu 23· ^ε χ ^:"^/^Polska Akadenia Eauk - Zaklad Hechanikl PL 755 ^ Gorotworu 23 · ^ ε χ ^: "^ / ^
EZ/S'" 3O-O59 Krakow/PolenEZ / S '"3O-O59 Krakow / Poland
OszillationsanemometerOscillation anemometer
Gegenstand der Erfindung ist ein Oszillationsanemoaeter zur Messung der Gasströnungsgeschsiindigkeit. Bekannte Oszillationsanemometer bestehen aus einem Spannungsverstärker f einer an Verstärke raus gang angeschlossenen' Flip-Flop-Schaltung5 einem Fiihlers der sich^usammensetzt^aus einem an die Flip-Flop Schaltung angeschlossenen Wärmesignalsender und eiren an den Verstärkereingang angeschlossenen Wärmesignaldetektor, sowie aus einem Frequenzmesser < >. Der Sender und der Detektor des Wärmesignals ist im durchströmenden Gas untergebracht und bildet mit dem Gas zusammen eine Schleife der positiven Rückkopplung, Der Messfühler ist so angeordnet, dassThe invention relates to an oscillation anemometer for measuring the gas flow rate. Known oscillation anemometers consist of a voltage amplifier f a flip-flop circuit connected to the amplifier output, a sensor s composed of a heat signal transmitter connected to the flip-flop circuit and a heat signal detector connected to the amplifier input, as well as a frequency meter >. The transmitter and the detector of the heat signal are accommodated in the gas flowing through and together with the gas form a loop of positive feedback. The sensor is arranged in such a way that
309850/0904309850/0904
der Sender sich an"der Luvseite befindet. Der auf diese Weise entstandene Schwingkreis, besitzt eine von der Verzögerung auf dem Weg Sender-Detektor abhängige Schwingfrequenz, die gleichzeitig eine Funktion der Gasgeschwindigkeit ist» Die Frequenzmessung erfolgt mit Hilfe eines an den Schwingkreis angeschlossenen Frequenzmessers. Ein Uachteil dieser Anemometer ist die Tatsache, dass mit der Geschwindigkeitszunahme<yerringert^> sich das durch den Sender abgegebene Tenperatursignal, auf Grund einer immer stärkeren"Xühlung des Senders. Das bewirkt eine Begrenzung des Messbereiches von oben.the transmitter is on the windward side The resonant circuit created in this way has one of the delay on the way transmitter-detector dependent oscillation frequency, which is also a function of the gas velocity »The Frequency measurement takes place with the help of a frequency meter connected to the oscillating circuit. A disadvantage of this anemometer is the fact that <yerredert ^> as the speed increases The temperature signal emitted by the transmitter changes due to an ever stronger cooling of the Transmitter. This causes the measuring range to be limited from above.
Ein zusätzlicher Nachteil dieser Anemometer ist der Einfluss der Zeitkonstanten des Senders und des Detektors auf Phasenverschiebung in der Bückkopplungsschleife. Falls das Anemometer zur Messung der Geschwindigkeit eines auf eine hohe Temperatur erwärmten Gas angewendet wird, ist es notwendig als Sender und Detektor Drähte aus Platiniridium mit einem grösseren Durchmesser zu benutzen. Grosse Zeitkonstanten dieser Drähte machen die Durchführung der Messung bei grösseren Geschwindigkeiten unmöglich.An additional disadvantage of these anemometers is the influence of the time constants of the transmitter and the Detector for phase shift in the feedback loop. In case the anemometer is used to measure the speed of a high temperature If heated gas is applied, it is necessary as a transmitter and detector using wires made of platinum iridium to use a larger diameter. Large time constants of these wires make the implementation impossible to measure at higher speeds.
Die Erfindung bezweckt diese Nachteile zu beseitigen, durch die Einführung solchen Anordnung, die die Amp Ii-The invention aims to eliminate these disadvantages, by introducing such an arrangement that the amp Ii-
309850/0904309850/0904
tude ö.es V/äi'^:esignals aus aera Sende* γοη cLcX
C%sströ:nung£geschv,;indigkeit unabhängig macht und.·
als ZeitLrcnstauten des Sendeis und des Detektors
wesentlich verringert.
I*ieiv/ui'de ersielt durch die Anwendung irr. "xelatude ö.es V / ai '^: esignals from aera transmitting * γοη cLcX C% sströ: £ geschv voltage; independence and. · as time congestion of the transmitter and the detector is significantly reduced.
I * ieiv / ui'de obtained by using irr. "xela
des Senders und/oder des Detektors eine* Schaltung mit konstanter Temperatur* Die Schaltung ~:it kcn~ stanter Tempere.tun- verringert vielfach die Zeitkonstanten der Drähte und nacht die Tempora tür dieser- Drähte von der l-iihlun-sintenslvitä't unabhängig. of the transmitter and / or the detector a * circuit with constant temperature * The circuit ~: it kcn ~ stanter Tempere.tun- often reduces the time constants of the wires and, at night, the tempora door these wires are independent of the l-iihlun-sintenslvitä't.
Der Gegenstand der Erfindung Ist an einem Beispiel a liön<i der· Zeichnung näher erläutert. Ein The object of the invention is explained in the · drawing closer to an example of a liön <i. A
Oszlllationsanetaometer Ist mit 'Schaltungen ^ und 2 ausgerüstet, die eine konstante Temperatur des Detektors 3 und des Senders 4 gewährleisten.Sn elektrisches Signal aus der Schaltung/mit konstanter Temperatur wird an den Verstärker 5 und an die Flip-Flop-Schaltung 6 geschickt. An den Ausgang dex Fllp-Flop'-Schaltung 6 Ist die Schaltung2mit konstanter. Temperatur und der Sender 4 se angeschlossen, dass die zwei Zustände der Flip-Flop-Schaltung 6 den zwei Temperaturen des Senders 4 entsprechen, die während einer Zustandsdauer der Fllp-Flop-Schaltung^konstant bleiben. Die, Oszlllationsanetaometer Is equipped with 'circuits ^ and 2, which ensure a constant temperature of the detector 3 and the transmitter 4. An electrical signal from the circuit / with constant temperature is sent to the amplifier 5 and to the flip-flop circuit 6. At the output dex Fllp-Flop 'circuit 6, the circuit 2 is constant. Temperature and the transmitter 4 se connected that the two states of the flip-flop circuit 6 correspond to the two temperatures of the transmitter 4, which remain constant during a state duration of the fllp-flop circuit ^. The,
Frequenz v/lrd mit einem Frequenzmesser. 7 gemessen-Frequency v / lrd with a frequency meter. 7 measured-
SADSAD
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL15574472A PL82094A6 (en) | 1972-06-02 | 1972-06-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2326311A1 true DE2326311A1 (en) | 1973-12-13 |
Family
ID=19958788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19732326311 Pending DE2326311A1 (en) | 1972-06-02 | 1973-05-23 | OSCILLATION ANEMOMETER |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE800442A (en) |
DE (1) | DE2326311A1 (en) |
DK (1) | DK139646B (en) |
FR (1) | FR2187126A7 (en) |
GB (1) | GB1422685A (en) |
NL (1) | NL7307528A (en) |
PL (1) | PL82094A6 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9406018D0 (en) * | 1994-03-25 | 1994-05-11 | Bartington John K | Method and devices for measurement of flow speed using continuous oscillations in a thermal wave |
-
1972
- 1972-06-02 PL PL15574472A patent/PL82094A6/xx unknown
-
1973
- 1973-05-23 DE DE19732326311 patent/DE2326311A1/en active Pending
- 1973-05-30 FR FR7319735A patent/FR2187126A7/fr not_active Expired
- 1973-05-30 NL NL7307528A patent/NL7307528A/xx not_active Application Discontinuation
- 1973-05-31 GB GB2609773A patent/GB1422685A/en not_active Expired
- 1973-06-01 DK DK305073A patent/DK139646B/en unknown
- 1973-06-04 BE BE131870A patent/BE800442A/en unknown
Also Published As
Publication number | Publication date |
---|---|
BE800442A (en) | 1973-10-01 |
FR2187126A7 (en) | 1974-01-11 |
GB1422685A (en) | 1976-01-28 |
DK139646C (en) | 1979-09-03 |
DK139646B (en) | 1979-03-19 |
PL82094A6 (en) | 1975-10-31 |
NL7307528A (en) | 1973-12-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OHA | Expiration of time for request for examination |