DE3482494D1 - Eingangssignalabhaengige ansprechschwellenerzeugung und zugehoeriges geraet. - Google Patents

Eingangssignalabhaengige ansprechschwellenerzeugung und zugehoeriges geraet.

Info

Publication number
DE3482494D1
DE3482494D1 DE8484903124T DE3482494T DE3482494D1 DE 3482494 D1 DE3482494 D1 DE 3482494D1 DE 8484903124 T DE8484903124 T DE 8484903124T DE 3482494 T DE3482494 T DE 3482494T DE 3482494 D1 DE3482494 D1 DE 3482494D1
Authority
DE
Germany
Prior art keywords
input signal
related device
response threshold
threshold generation
depending
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 - Lifetime
Application number
DE8484903124T
Other languages
English (en)
Inventor
C Lynnworth
E Matson
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.)
Panametrics LLC
Original Assignee
Panametrics LLC
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 Panametrics LLC filed Critical Panametrics LLC
Application granted granted Critical
Publication of DE3482494D1 publication Critical patent/DE3482494D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01P5/24—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 direct influence of the streaming fluid on the properties of a detecting acoustical wave
    • G01P5/245—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 direct influence of the streaming fluid on the properties of a detecting acoustical wave by measuring transit time of acoustical waves
    • 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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02836—Flow rate, liquid level

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Measuring Volume Flow (AREA)
DE8484903124T 1983-07-29 1984-07-27 Eingangssignalabhaengige ansprechschwellenerzeugung und zugehoeriges geraet. Expired - Lifetime DE3482494D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/518,344 US4538469A (en) 1983-07-29 1983-07-29 Integrated threshold arming method and apparatus
PCT/US1984/001209 WO1985000654A1 (en) 1983-07-29 1984-07-27 Integrated threshold arming method and apparatus

Publications (1)

Publication Number Publication Date
DE3482494D1 true DE3482494D1 (de) 1990-07-19

Family

ID=24063529

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484903124T Expired - Lifetime DE3482494D1 (de) 1983-07-29 1984-07-27 Eingangssignalabhaengige ansprechschwellenerzeugung und zugehoeriges geraet.

Country Status (6)

Country Link
US (1) US4538469A (de)
EP (1) EP0155945B1 (de)
JP (1) JPS60502169A (de)
DE (1) DE3482494D1 (de)
IT (1) IT8422113A0 (de)
WO (1) WO1985000654A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5349860A (en) * 1989-11-28 1994-09-27 Nkk Corporation Apparatus for measuring the thickness of clad material
NZ243294A (en) * 1991-06-25 1995-04-27 Commw Scient Ind Res Org Time of flight of acoustic wave packets through fluid: reduction of higher order acoustic mode effects
NZ243293A (en) * 1991-06-25 1995-03-28 Commw Scient Ind Res Org Fluid flow meter: time of travel of acoustic wave packet through fluid
US5639971A (en) * 1996-10-04 1997-06-17 Dieterich Technology Holding Corp. Method and apparatus for detecting a signal
SE9802762D0 (sv) * 1998-08-19 1998-08-19 Siemens Elema Ab Zero crossing detector and method of determining a zero crossing point
DE69939485D1 (de) * 1998-11-12 2008-10-16 Smithkline Beecham Plc Arzneimittel zur gesteuerten freisetzung eines insulin sensibilisators und metformin
JP2001124745A (ja) 1999-08-16 2001-05-11 Ngk Spark Plug Co Ltd 超音波伝播時間測定方法、ガス圧力測定方法、ガス流量測定方法、及びガスセンサ
JP2002243536A (ja) 2001-02-19 2002-08-28 Ngk Spark Plug Co Ltd 超音波伝播時間測定方法及びガス濃度センサ
US7096135B2 (en) 2004-03-12 2006-08-22 Panametrics, Inc. Method and system for calculating the transit time of an ultrasonic pulse
US8804457B2 (en) 2011-03-31 2014-08-12 Maxim Integrated Products, Inc. Transmit/receive systems for imaging devices

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727143A (en) * 1971-12-06 1973-04-10 Ampex Integrating level sensing circuit
US3869915A (en) * 1973-01-23 1975-03-11 Joseph Baumoel Digital flowmeter
JPS5433542B2 (de) * 1973-06-23 1979-10-22
US4080574A (en) * 1974-01-31 1978-03-21 United Kingdom Atomic Energy Authority Apparatus for providing time reference signals
US3981191A (en) * 1975-07-05 1976-09-21 Danfoss A/S Method and apparatus for the ultrasonic measurement of the flow velocity of fluent media
US4022058A (en) * 1975-08-07 1977-05-10 Brown Alvin E Apparatus for determining the arrival time of alternating signals
US4232548A (en) * 1979-03-01 1980-11-11 Joseph Baumoel Liquid flow meter

Also Published As

Publication number Publication date
JPH0572527B2 (de) 1993-10-12
JPS60502169A (ja) 1985-12-12
US4538469A (en) 1985-09-03
EP0155945B1 (de) 1990-06-13
WO1985000654A1 (en) 1985-02-14
EP0155945A1 (de) 1985-10-02
IT8422113A0 (it) 1984-07-30
EP0155945A4 (de) 1987-01-10

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee
8364 No opposition during term of opposition