GB1332819A - Flow-electrical transducer - Google Patents

Flow-electrical transducer

Info

Publication number
GB1332819A
GB1332819A GB5979670A GB5979670A GB1332819A GB 1332819 A GB1332819 A GB 1332819A GB 5979670 A GB5979670 A GB 5979670A GB 5979670 A GB5979670 A GB 5979670A GB 1332819 A GB1332819 A GB 1332819A
Authority
GB
United Kingdom
Prior art keywords
wire
support
tube
flow channel
flow
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
Application number
GB5979670A
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.)
Festo Maschinenfabrik Gottlieb Stoll Firma
Original Assignee
Festo Maschinenfabrik Gottlieb Stoll Firma
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 Festo Maschinenfabrik Gottlieb Stoll Firma filed Critical Festo Maschinenfabrik Gottlieb Stoll Firma
Publication of GB1332819A publication Critical patent/GB1332819A/en
Expired legal-status Critical Current

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
    • G01P5/12—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 using variation of resistance of a heated conductor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element
    • G01F1/69—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element of resistive type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element
    • G01F1/69—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element of resistive type
    • G01F1/692—Thin-film arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Measuring Volume Flow (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

1332819 Measuring fluid-flow electrically FESTO MASCHINENFABRIK GOTTLIEB STOLL 16 Dec 1970 [24 Dec 1969] 59796/70 Heading G1N A flow-electrical transducer comprises a fluidflow channel in a support consisting of thermoplastic electrically insulating material i.e. a synthetic polymer or glass, with at least one electric resistance wire, heatable by passage of an electric current through it, traversing the flow channel and having portions embedded in it and passing through the wall of the said flow channel which wire has different diameters at different parts of its length, the part of smallest diameter being arranged in the flow channel and the wire being of larger diameter where it passes through the wall, wire terminals being provided at the exterior of the support for connection to an external circuit. The transducer is made by the steps of: passing heating current through the silver-plated platinum wire 2 to raise it to a temperature in excess of the melting point of the thermoplastic material forming the support tube 1; moving the wire and the support tube together so that the tube wall melts on contact with the wire and resolidifies as the wire is moved towards the centre of the tube; positioning the wire by means of a rod 10 approximately centrally of the tube; removing heating current whilst the wire is tensioned to produce a sag at a part 6 of the wire; removing by electrolysis the plating on the wire inside the tube to reduce its diameter from 100 microns to ten microns. Before the plating is removed a shock current of 6 amps is applied to the wire to evaporate adherent residues from the support tube. End connectors for the wire in the form of gold rings are forced on to the support. In an alternative embodiment Fig.4 the support is boatshaped whereby during incorporation of the wire into the support no material is adhered to the portions of the wire which lie in the flow channel.
GB5979670A 1969-12-24 1970-12-16 Flow-electrical transducer Expired GB1332819A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1923469A CH518552A (en) 1969-12-24 1969-12-24 Flow-electrical converter

Publications (1)

Publication Number Publication Date
GB1332819A true GB1332819A (en) 1973-10-03

Family

ID=4438176

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5979670A Expired GB1332819A (en) 1969-12-24 1970-12-16 Flow-electrical transducer

Country Status (4)

Country Link
CH (1) CH518552A (en)
DE (1) DE2059879B2 (en)
FR (1) FR2072051B1 (en)
GB (1) GB1332819A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2947856A1 (en) * 1979-11-28 1981-07-23 Robert Bosch Gmbh, 7000 Stuttgart DEVICE FOR MEASURING THE MASS OF A FLOWING MEDIUM
US4523461A (en) * 1983-05-02 1985-06-18 Air Sensors, Inc. Hot wire anemometer
DE4228474A1 (en) * 1992-08-27 1994-03-03 Draegerwerk Ag Introducing gold@ or platinum@ contact wire into thermoplastic housing of electrochemical gas sensor - passing current through wire to heat to temp. above melting point of plastic, pressing into housing to required position and fixing fluid-tightly by cooling

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2552017A (en) * 1947-04-26 1951-05-08 Wright Aeronautical Corp Flowmeter

Also Published As

Publication number Publication date
FR2072051B1 (en) 1975-01-10
DE2059879A1 (en) 1971-07-01
CH518552A (en) 1972-01-31
DE2059879B2 (en) 1980-02-14
FR2072051A1 (en) 1971-09-24

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee