GB953167A - Improvements in and relating to ultra-sonic transmitters and receivers - Google Patents

Improvements in and relating to ultra-sonic transmitters and receivers

Info

Publication number
GB953167A
GB953167A GB1758759A GB1758759A GB953167A GB 953167 A GB953167 A GB 953167A GB 1758759 A GB1758759 A GB 1758759A GB 1758759 A GB1758759 A GB 1758759A GB 953167 A GB953167 A GB 953167A
Authority
GB
United Kingdom
Prior art keywords
filling
blocks
tungsten
piezo
coupling
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
GB1758759A
Inventor
Geoffrey Bradfield
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB1758759A priority Critical patent/GB953167A/en
Publication of GB953167A publication Critical patent/GB953167A/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
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

953,167. Ultrasonic wave couplings. NATIONAL RESEARCH DEVELOPMENT CORPORATION. May 23, 1960 [May 22, 1959], No. 17582/59. Heading H4J. The space between the coupling blocks 11, 12 carrying the piezo-electric transmitter 16 and receiver 17 of an ultrasonic testing probe is filled with material 18 which, in the region adjacent the coupling block surface, has a characteristic impedance higher than the characteristio impedance of the blocks. The high characteristic impedance of the filling avoids a change of phase of # on reflection at the side face. The coupling blocks are of polymethyl methacrylate resin and may be joined by an integral web 13. The filling is a polyester resin or an epoxy resin loaded with heavy particles of tungsten powder or chopped tungsten wire. The filling may include fibrous material to increase absorption. A thin layer of tungsten may be cemented to each face of the filling so that the coupling blocks are in direct contact with tungsten. The piezo-electric elements 16, 18 may comprise stacks of crystals operable over a range of frequencies as described in Specification 841,512. The piezo-electric elements 16, 18 carry damping backings 22 and are screened by an electrostatic shield 23. Layers 21 of the filling material 18 may be applied to the outside faces of the blocks. It is desirable that the thickness of the filling 18 between the blocks should be greater than 4/3# and the thickness of the web 13 should be less than or equal to 2/3# where # is the longest wavelength used.
GB1758759A 1959-05-22 1959-05-22 Improvements in and relating to ultra-sonic transmitters and receivers Expired GB953167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1758759A GB953167A (en) 1959-05-22 1959-05-22 Improvements in and relating to ultra-sonic transmitters and receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1758759A GB953167A (en) 1959-05-22 1959-05-22 Improvements in and relating to ultra-sonic transmitters and receivers

Publications (1)

Publication Number Publication Date
GB953167A true GB953167A (en) 1964-03-25

Family

ID=10097776

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1758759A Expired GB953167A (en) 1959-05-22 1959-05-22 Improvements in and relating to ultra-sonic transmitters and receivers

Country Status (1)

Country Link
GB (1) GB953167A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546924A (en) * 1966-12-13 1970-12-15 Concast Ag Device for locating boundaries of non-homogeneous bodies
US4454767A (en) * 1980-03-25 1984-06-19 Fuji Electric Co., Ltd. Ultrasonic metering device
CN103792292A (en) * 2014-01-27 2014-05-14 中国矿业大学 Coupling method of loose ring ultrasonic testing probe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546924A (en) * 1966-12-13 1970-12-15 Concast Ag Device for locating boundaries of non-homogeneous bodies
US4454767A (en) * 1980-03-25 1984-06-19 Fuji Electric Co., Ltd. Ultrasonic metering device
CN103792292A (en) * 2014-01-27 2014-05-14 中国矿业大学 Coupling method of loose ring ultrasonic testing probe

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