GB1418181A - Ultrasonic detection of inclusions in a fluid flowing within a tube - Google Patents

Ultrasonic detection of inclusions in a fluid flowing within a tube

Info

Publication number
GB1418181A
GB1418181A GB948273A GB948273A GB1418181A GB 1418181 A GB1418181 A GB 1418181A GB 948273 A GB948273 A GB 948273A GB 948273 A GB948273 A GB 948273A GB 1418181 A GB1418181 A GB 1418181A
Authority
GB
United Kingdom
Prior art keywords
receiver
fluid
transmitter
tube
plastics
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
GB948273A
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.)
Cole E M
Original Assignee
Cole E M
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 Cole E M filed Critical Cole E M
Priority to GB948273A priority Critical patent/GB1418181A/en
Priority to US445870A priority patent/US3921622A/en
Publication of GB1418181A publication Critical patent/GB1418181A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3626—Gas bubble detectors
    • 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
    • G01N2291/024—Mixtures
    • G01N2291/02433—Gases in liquids, e.g. bubbles, foams
    • 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
    • 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
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0421—Longitudinal waves

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Vascular Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Anesthesiology (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Analytical Chemistry (AREA)
  • Cardiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

1418181 Acoustic detection of inclusions in a fluid; ultrasonic probes E M COLE 27 Feb 1973 9482/73 Headings H4D and H4J The presence of inclusions in a fluid flowing through a flexible tube is detected by deforming at least part of the tube so that it adopts a substantially rectangular cross-section, positioning a pair of supports such that they are urged against respective opposite sides of the tube's cross-section, directing a planar ultrasonic beam transversely through the fluid via one said support, and detecting any change in the ultrasonic signal received by a receiver coupled to the other support. For detecting bubbles in blood passing through a plastics pipe in, e.g. an artificial kidney machine, the pipe is gripped in a probe which houses a CW-energized ultrasonic transmitter and a receiver operated in a throughtransmission mode. The receiver output is AGC-amplified then fed via a filter to a trigger circuit having an adjustable threshold. The trigger circuit responds to any abrupt change in the received signal amplitude and actuates a counter and/or audible alarm. The filter output is recorded and may be analysed to determine bubble size. Other uses of the invention include detecting bubbles in photographic solutions, nuclear reactors, heat exchangers and fuel lines, and checking outgassing operations. Probe details.-As shown the transmitter and receiver 14, 15 each comprise a rectangular piezoelectric slab 16 pre-stressed by sandwiching it between plastics members 17. Blocks 2, 3 support the transmitter and receiver and block 3 has a groove 7 to receive the fluid-carrying pipe 8. The plastics avoids direct transmission of energy to the receiver via the probe material. The pre-stressing clamps the slab 16 vibrations so that these are not significantly affected by pressure pulsations of the fluid. In a modificacation the transmitter and receiver are housed in cavities in the limbs of a C-shaped plastics. member which clips over pipe 8. Magnetostrictive transducers may be used instead of piezoelectric slabs.
GB948273A 1973-02-27 1973-02-27 Ultrasonic detection of inclusions in a fluid flowing within a tube Expired GB1418181A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB948273A GB1418181A (en) 1973-02-27 1973-02-27 Ultrasonic detection of inclusions in a fluid flowing within a tube
US445870A US3921622A (en) 1973-02-27 1974-02-26 Method and apparatus for ultrasonic detection of inclusions in a flowing fluid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB948273A GB1418181A (en) 1973-02-27 1973-02-27 Ultrasonic detection of inclusions in a fluid flowing within a tube

Publications (1)

Publication Number Publication Date
GB1418181A true GB1418181A (en) 1975-12-17

Family

ID=9872822

Family Applications (1)

Application Number Title Priority Date Filing Date
GB948273A Expired GB1418181A (en) 1973-02-27 1973-02-27 Ultrasonic detection of inclusions in a fluid flowing within a tube

Country Status (2)

Country Link
US (1) US3921622A (en)
GB (1) GB1418181A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3421176A1 (en) * 1984-06-07 1985-12-19 Sartorius GmbH, 3400 Göttingen Device for the acoustic detection of gas bubbles in liquids such as blood or infusion solutions
GB2177510A (en) * 1985-07-01 1987-01-21 Partridge Wilson And Company L Detecting the presence or absence of a liquid
EP0222986A1 (en) * 1985-08-28 1987-05-27 Stöckert Instrumente GmbH Ultra-sonic sensor for detecting air bubbles in flowing liquids
EP2615428A1 (en) * 2012-01-13 2013-07-17 Atsuden Co., Ltd Ultrasonic flowmeter apparatus
WO2022157192A1 (en) * 2021-01-20 2022-07-28 Raumedic Ag Medical flow sensor module assembly

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US4112927A (en) * 1975-12-04 1978-09-12 Renco Corporation Ultrasonic detector with audible indication signal
US4068521A (en) * 1976-07-22 1978-01-17 Renal Systems, Inc. Ultrasonic air and blood foam detector
US4152928A (en) * 1977-05-02 1979-05-08 University Patents, Inc. System for detecting fat particles in blood
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US4290432A (en) * 1978-10-11 1981-09-22 Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Decompression bubble detectors
US4319580A (en) * 1979-08-28 1982-03-16 The Board Of Regents Of The University Of Washington Method for detecting air emboli in the blood in an intracorporeal blood vessel
US4354502A (en) * 1979-08-28 1982-10-19 The Board Of Regents Of The University Of Washington Intravascular catheter including untrasonic transducer for use in detection and aspiration of air emboli
US4354500A (en) * 1979-08-28 1982-10-19 Univ Washington System using ultrasonic energy for detection and quantification of air emboli
US4354501A (en) * 1979-08-28 1982-10-19 Univ Washington Esophageal catheter including ultrasonic transducer for use in detection of air emboli
US4316391A (en) * 1979-11-13 1982-02-23 Ultra Med, Inc. Flow rate measurement
US4341116A (en) * 1980-03-06 1982-07-27 Baxter Travenol Laboratories, Inc. Liquid absence detector
US4359055A (en) * 1980-06-23 1982-11-16 Renco Corporation Automatic digital backfat meter
US4359056A (en) * 1980-06-23 1982-11-16 Renco Corporation Automatic digital backfat meter
US4418565A (en) * 1980-12-03 1983-12-06 Baxter Travenol Laboratories, Inc. Ultrasonic bubble detector
US4607520A (en) * 1984-01-09 1986-08-26 Introtek Corporation Method and apparatus for detecting discontinuities in a fluid stream
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US4882928A (en) * 1987-12-22 1989-11-28 Lane Jr William E Refrigeration efficiency monitoring system
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US5064412A (en) * 1989-09-05 1991-11-12 Pacesetter Infusion, Ltd. Ultrasonic air-in-line detector for a medication infusion system
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US5247938A (en) * 1990-01-11 1993-09-28 University Of Washington Method and apparatus for determining the motility of a region in the human body
US5123275A (en) * 1990-12-07 1992-06-23 Ivac Corporation Air in-line sensor system
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US5329927A (en) * 1993-02-25 1994-07-19 Echo Cath, Inc. Apparatus and method for locating an interventional medical device with a ultrasound color imaging system
US5470604A (en) * 1993-04-08 1995-11-28 Chartered Semiconductor Manufacturing Pte Ltd. Apparatus and method for spreading resist on a wafer and detecting bubbles in the resist
US5394732A (en) * 1993-09-10 1995-03-07 Cobe Laboratories, Inc. Method and apparatus for ultrasonic detection of air bubbles
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3421176A1 (en) * 1984-06-07 1985-12-19 Sartorius GmbH, 3400 Göttingen Device for the acoustic detection of gas bubbles in liquids such as blood or infusion solutions
GB2177510A (en) * 1985-07-01 1987-01-21 Partridge Wilson And Company L Detecting the presence or absence of a liquid
EP0222986A1 (en) * 1985-08-28 1987-05-27 Stöckert Instrumente GmbH Ultra-sonic sensor for detecting air bubbles in flowing liquids
US4722224A (en) * 1985-08-28 1988-02-02 Shiley Inc. Ultrasonic sensor for the detection of gas bubbles
AU574583B2 (en) * 1985-08-28 1988-07-07 Scheller, T. Ultrasonic sensor for the detection of gas bubbles
EP2615428A1 (en) * 2012-01-13 2013-07-17 Atsuden Co., Ltd Ultrasonic flowmeter apparatus
CN103206992A (en) * 2012-01-13 2013-07-17 株式会社压电 Ultrasonic Flowmeter Apparatus
CN103206992B (en) * 2012-01-13 2015-11-25 株式会社压电 Ultrasonic flow measures device
WO2022157192A1 (en) * 2021-01-20 2022-07-28 Raumedic Ag Medical flow sensor module assembly

Also Published As

Publication number Publication date
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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee
728C Application made for restoration (sect. 28/1977)
728R Application refused (sect. 28/1977) [restoration of lapsed patent]