DE2326311A1 - OSCILLATION ANEMOMETER - Google Patents

OSCILLATION ANEMOMETER

Info

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
Application number
DE19732326311
Other languages
German (de)
Inventor
Jan Dr Kielbasa
Jozef Dipl Phys Rysz
Andrzej Dr Ing Smolarski
Boleslaw Dipl Ing Stasicki
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.)
POLSKA AKADEMIA NAUK ZAKLAD
Original Assignee
POLSKA AKADEMIA NAUK ZAKLAD
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 POLSKA AKADEMIA NAUK ZAKLAD filed Critical POLSKA AKADEMIA NAUK ZAKLAD
Publication of DE2326311A1 publication Critical patent/DE2326311A1/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/10Measuring 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
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/18Measuring 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. "xela
tude 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)

>. 4 - P1 7552 >. 4 - P1 7552 23. Mai 1973May 23, 1973 EZ/Br ' PatentansprücheEZ / Br 'claims Cszillatlonsanemoraeter mit Spannungsverstärker-Flip-Flop-Schaltung und Messfühler, der aus einem Sender und Detektor des 7/arr.eSignaIs besteht,Cszillatlonsanemoraeter with voltage amplifier flip-flop circuit and measuring probe, which consists of a The transmitter and detector of the 7 / arr.eSignaIs exist, dadurch gekennzeichnet, dssscharacterized in that dsss er eine an den Sender /4/ angeschlossene Schaltung (2) mit konstanter Temperatur zur GeY;ährle istunghe has a circuit (2) connected to the transmitter / 4 / with constant temperature for the purpose of measuring einer konstanten Temperatur des Senders und/oder eine an den Detektor /3/ angeschlossene Schaltung (Ί) init konstanter Temperatur zur Gewährleistunga constant temperature of the transmitter and / or a circuit (Ί) connected to the detector / 3 / with a constant temperature to ensure einer konstanten Temperatur des Detektors besitzt.has a constant temperature of the detector. 309850/0904309850/0904 BAD ORIGINALBATH ORIGINAL
DE19732326311 1972-06-02 1973-05-23 OSCILLATION ANEMOMETER Pending DE2326311A1 (en)

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)

* Cited by examiner, † Cited by third party
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

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

Similar Documents

Publication Publication Date Title
US4112744A (en) Apparatus for detecting water in oil
US4270391A (en) Frequency-responsive filter for flowmeter transmission system
GB1528917A (en) Method and apparatus for monitoring the flow of liquid and the like
DE3106887A1 (en) METHOD AND DEVICE FOR DISPLAYING A DEW POINT OR THE LIKE
DE2326311A1 (en) OSCILLATION ANEMOMETER
DE2500897C3 (en) Thermal method for measuring the velocity distribution in fluid media
Cooke-Yarborough et al. An improved quench circuit for Geiger Counters
US3549989A (en) Measuring apparatus including means for amplitude modulating a conductivity signal with a temperature signal
DE3373705D1 (en) Heat quantity counter
DE2651142A1 (en) Acoustic fluid flowmeter using spaced transducers - includes signal generating and analysing circuitry measuring phase difference between sine wave signals
CH607001A5 (en) Mass transfer measuring appts. for heat fluid flow
JPS54161381A (en) Temperature detector
RU2003128C1 (en) Method of determination of thermal resistance of junction-can of semiconductor diodes
DE1913544A1 (en) Measurement method and device for determining the flow speed and flow direction of a medium
SU864091A2 (en) Conductometer
SU1372250A1 (en) Method of measuring parameters of rc- and rl-circuits
DE2924086A1 (en) Monitoring concn. and temp. of reaction solns. - using small sample but with homogenisation by ultrasonic vibration
SU734623A1 (en) Device for determining phase-frequency characteristics of dynamic object
DE102004058641B4 (en) Method for the continuous or discontinuous determination of the concentration of the constituents contained in a medium by means of evaluation of the microwaves permeating the medium
FR2358652A1 (en) Monitoring properties esp. pH of aq. solns. - using photodetector measuring monochromatic light transmission rate through the soln.
JPS56157844A (en) Humidity detector
SU854141A1 (en) Radioisotope device
SU382217A1 (en) PULSE EXCITATION GENERATOR
SU498628A1 (en) Device for solving differential equations
RU2025044C1 (en) Method of digital measurement of temperature and device for its realization

Legal Events

Date Code Title Description
OHA Expiration of time for request for examination