GB1155361A - Feed-Back for Hot Wire Anemometer - Google Patents

Feed-Back for Hot Wire Anemometer

Info

Publication number
GB1155361A
GB1155361A GB251666A GB251666A GB1155361A GB 1155361 A GB1155361 A GB 1155361A GB 251666 A GB251666 A GB 251666A GB 251666 A GB251666 A GB 251666A GB 1155361 A GB1155361 A GB 1155361A
Authority
GB
United Kingdom
Prior art keywords
amplifier
anemometer
filter
wire
fluid
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
GB251666A
Inventor
David John Craft
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.)
British Telecommunications PLC
British Telecommunications Research Ltd
Original Assignee
British Telecommunications PLC
British Telecommunications Research Ltd
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 British Telecommunications PLC, British Telecommunications Research Ltd filed Critical British Telecommunications PLC
Priority to GB251666A priority Critical patent/GB1155361A/en
Publication of GB1155361A publication Critical patent/GB1155361A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

1,155,361. Measuring fluid-flow electrically. BRITISH TELECOMMUNICATIONS RESEARCH Ltd. Jan. 16, 1967 [Jan.19, 1966], No. 2516/66. Heading G1N. In a hot wire anemometer, Fig. 3, the resistance and temperature of the wire W, which is connected in series with a resistor R, are maintained constant by a feedback circuit including an amplifier A, the effect of high frequency noise being reduced by connecting the output of the amplifier A to a high pass filter HPF having a cut off frequency greater than the upper limit of the desired frequency response of the anemometer, and using the D.C. output of a detector D feed from the filter to reduce the input signal to A. An amplifier A1 may be used between the filter and the detector. The heating current supplied by the amplifier is a measure of fluid-flow past the wire W. The amplifier A may be transistorized, and the filter circuit, which gives the anemometer a frequency response upper limit of 100 Kc/s, also compensates for temperature dependent variations in amplifier characteristics. The anemometer may detect pulses in a fluid logic system.
GB251666A 1966-01-19 1966-01-19 Feed-Back for Hot Wire Anemometer Expired GB1155361A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB251666A GB1155361A (en) 1966-01-19 1966-01-19 Feed-Back for Hot Wire Anemometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB251666A GB1155361A (en) 1966-01-19 1966-01-19 Feed-Back for Hot Wire Anemometer

Publications (1)

Publication Number Publication Date
GB1155361A true GB1155361A (en) 1969-06-18

Family

ID=9740945

Family Applications (1)

Application Number Title Priority Date Filing Date
GB251666A Expired GB1155361A (en) 1966-01-19 1966-01-19 Feed-Back for Hot Wire Anemometer

Country Status (1)

Country Link
GB (1) GB1155361A (en)

Similar Documents

Publication Publication Date Title
GB1178348A (en) Negative Feedback Circuit Employing Combination Amplifier and Lead-Lag Compensation Network.
GB1281604A (en) Methods of measuring physical quantities
GB1208846A (en) Threshold level detection system
GB1155361A (en) Feed-Back for Hot Wire Anemometer
ES404957A1 (en) Rms sensing apparatus
GB997181A (en) Temperature measuring instrument
GB846068A (en) Distance measuring apparatus
GB1425917A (en) Rms converter
GB1212039A (en) Boundary value voltage or current sensors
GB1103954A (en) Photoelectric amplifier circuit
GB1460997A (en) Radiation flux measuring device
GB1158001A (en) Improvements in or relating to Condition Responsive Bridge Circuits
GB1303951A (en)
GB1329999A (en) Device for clipping electrical signals
JPS5651618A (en) Hot-wire flow sensor circuit
GB1149775A (en) Thin film resistors
GB1383075A (en) Signal transmission system
GB1126381A (en) System for measuring a variable impedance at a distance
GB1030941A (en) Circuit arrangement for varying the level of a signal
GB1125753A (en) Improvements in or relating to gain and attenuation control circuit arrangements
GB964390A (en) Improvements in or relating to apparatus for measuring the electrical conductivity of a liquid
GB1184043A (en) A Circuit Arrangement which may, for Example be Applied to an Alarm Device, and a Method of Producing an Alarm Signal
US3149318A (en) Temperature compensated sensitivity control network for disturbance detecting apparatus
GB1096020A (en) Electric circuit
GB1276014A (en) Improvements in or relating to electrical storage heating systems