GB1397065A - Defect detection - Google Patents

Defect detection

Info

Publication number
GB1397065A
GB1397065A GB719871A GB719871A GB1397065A GB 1397065 A GB1397065 A GB 1397065A GB 719871 A GB719871 A GB 719871A GB 719871 A GB719871 A GB 719871A GB 1397065 A GB1397065 A GB 1397065A
Authority
GB
United Kingdom
Prior art keywords
transducers
strip
sheet
liquid
transducer arrangement
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
GB719871A
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 Steel Corp
Original Assignee
British Steel Corp
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 Steel Corp filed Critical British Steel Corp
Priority to GB719871A priority Critical patent/GB1397065A/en
Publication of GB1397065A publication Critical patent/GB1397065A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
    • 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
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • 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
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water

Abstract

1397065 Ultrasonic probes; ultrasonic inspection devices BRITISH STEEL CORP 9 June 1972 [18 March 1971] 7198/71 Headings H4J and H4D In coupling a moving strip or sheet 4 (Fig. 1) with an ultrasonic transducer arrangement 1, a member 8 movable relative to a housing 3 is resiliently urged into contact with the strip or sheet 4 and coupling liquid is fed through a nozzle 16 and into passageways 15, 14 to flood the region between the transducer arrangement 1 and strip or sheet 4. The housing 3 comprises a cylindrical outer easing 5. Screws 6 secure an annular support 7 to which in use a detector 2 is attached. Member 8 is annular, is slidably mounted within outer casing 5 and is resiliently urged by three adjustable springs 9 away from annular support 7. Member 8 has a cylindrical extension 11. Support 7 has a cylindrical extension 12. The two extensions 11 and 12 are joined by a flexible tube 13 to define an inner chamber for the transducer arrangement 1 and detector 2. In use, this inner chamber is filled with water or other liquid which surrounds the transducer arrangement 1 and provides the acoustic coupling. The liquid is pumped through the nozzle 16 and passes through an opening 17 via an outlet elbow 18. The liquid may be recirculated by the pump or may merely pass out of the elbow 18. The device may utilize two transducers 22 (Fig. 2) of radius 10 mm. and three transducers 23 of radius 6 mm. They may cover an area of width 25 mm., each being coupled to a separate amplifier, all amplifiers having the same gain. Transducers 23 produce a defect signal when covered by a defect whose greatest dimension is 3 mm. whereas the same signal will be produced by transducers 22 only for a defect whose greatest dimension is at least 5 mm. Thus the transducers 23 are more sensitive than transducers 22 and may be used to test the edge of a strip or sheet where small defects are important, e.g. if a strip is to be welded at the edge.
GB719871A 1971-03-18 1971-03-18 Defect detection Expired GB1397065A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB719871A GB1397065A (en) 1971-03-18 1971-03-18 Defect detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB719871A GB1397065A (en) 1971-03-18 1971-03-18 Defect detection

Publications (1)

Publication Number Publication Date
GB1397065A true GB1397065A (en) 1975-06-11

Family

ID=9828489

Family Applications (1)

Application Number Title Priority Date Filing Date
GB719871A Expired GB1397065A (en) 1971-03-18 1971-03-18 Defect detection

Country Status (1)

Country Link
GB (1) GB1397065A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2231068A1 (en) * 1973-05-25 1974-12-20 Stanford Research Inst
GB2125968A (en) * 1982-08-19 1984-03-14 British Steel Corp Ultasonic testing of steel plates or tube
DE3444481A1 (en) * 1984-12-06 1986-07-31 Stahlwerke Peine-Salzgitter Ag, 3320 Salzgitter Test head holder for ultrasonic testing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2231068A1 (en) * 1973-05-25 1974-12-20 Stanford Research Inst
GB2125968A (en) * 1982-08-19 1984-03-14 British Steel Corp Ultasonic testing of steel plates or tube
DE3444481A1 (en) * 1984-12-06 1986-07-31 Stahlwerke Peine-Salzgitter Ag, 3320 Salzgitter Test head holder for ultrasonic testing

Similar Documents

Publication Publication Date Title
ES332374A1 (en) An apparatus for detecting leaks in a drive that transports a fluid in motion under pressure. (Machine-translation by Google Translate, not legally binding)
ES423980A1 (en) Inside diameter, outside diameter and wall tube gage
JPS52145283A (en) Ultrasonic fluid connection probe
GB1435972A (en) Method and apparatus for detecting particulate material in flow stream
US2966056A (en) Ultrasonic testing device
US4114557A (en) Particle monitoring system
US3814207A (en) An apparatus for detecting leak of fluid from a long pipeline for transporting fluid
ES334544A1 (en) Ultrasonic apparatus for measuring the position of a liquid level
ATE34843T1 (en) LEAK DETECTOR DEVICE FOR STEAM BOILERS.
US3409897A (en) Recorder for detecting and locating leaks in pipelines by ultrasonic vibration
GB1499569A (en) Leak-detection apparatus and liquid level determination
GB1397065A (en) Defect detection
US2483821A (en) Inspection of a solid part utilizing supersonic transmission
GB1350685A (en) Acoustical method and device for monitoring small distances
US3220248A (en) Ultrasonic inspection device
ES445837A1 (en) Moisture indicating apparatus
US3548640A (en) Cavitation detector
GB981893A (en) Ultrasonic testing head
US3636756A (en) Ultrasonic search unit with rolling contact
GB1365719A (en) Testing underwater pipelines for leaks
US3604252A (en) Interferometric system for measuring physical condition of a medium
GB1354864A (en) Densitometer
US3782172A (en) Leak detector for fluid conductors
US3491332A (en) Sonic detector
JPS5829462B2 (en) When the weather is too hot, it's too late.

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees