JPS576377A - Multiplication array type ultrasonic wave searching device - Google Patents

Multiplication array type ultrasonic wave searching device

Info

Publication number
JPS576377A
JPS576377A JP7898980A JP7898980A JPS576377A JP S576377 A JPS576377 A JP S576377A JP 7898980 A JP7898980 A JP 7898980A JP 7898980 A JP7898980 A JP 7898980A JP S576377 A JPS576377 A JP S576377A
Authority
JP
Japan
Prior art keywords
array type
ultrasonic wave
central axis
width
main beam
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.)
Pending
Application number
JP7898980A
Other languages
Japanese (ja)
Inventor
Jun Kubota
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7898980A priority Critical patent/JPS576377A/en
Publication of JPS576377A publication Critical patent/JPS576377A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
    • G01S7/52046—Techniques for image enhancement involving transmitter or receiver

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To compress the width of a main beam and improve bearing resolution by multiplying the reception signals of the element vibrators in the positions symmetrical to the central axis of an array type transducer then combining and adding their lower frequency components. CONSTITUTION:The outputs of preamplifiers 51-52m corresponding to the pairs of the signals received by the element vibrators (41 and 42m, 42 and 42m-1, -, 4m and 4m+1) in the positions symmetrical to the central axis A' of an array type transducer 4 are multipled respectively by the arrays 81-8m of m pieces of multipliers. The product signals thereof are passed respectively through low-pass filers 91-9m, and are matched of phases by, for example, delay circuits 101-10m, after which they are combined by an adder 7 and are outputted. Thereby, the width of a main beam is compressed and side lobes are supressed as well, so that the bearing resolution during ultrasonic wave searching is improved, and the position, shape, and size of a reflecting body are measured precisely.
JP7898980A 1980-06-13 1980-06-13 Multiplication array type ultrasonic wave searching device Pending JPS576377A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7898980A JPS576377A (en) 1980-06-13 1980-06-13 Multiplication array type ultrasonic wave searching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7898980A JPS576377A (en) 1980-06-13 1980-06-13 Multiplication array type ultrasonic wave searching device

Publications (1)

Publication Number Publication Date
JPS576377A true JPS576377A (en) 1982-01-13

Family

ID=13677298

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7898980A Pending JPS576377A (en) 1980-06-13 1980-06-13 Multiplication array type ultrasonic wave searching device

Country Status (1)

Country Link
JP (1) JPS576377A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58139088A (en) * 1982-02-13 1983-08-18 Furuno Electric Co Ltd Detected information display
JPS58214867A (en) * 1982-06-08 1983-12-14 Furuno Electric Co Ltd Wide range directional underwater detecting apparatus
JPS597260A (en) * 1982-07-05 1984-01-14 Toshiba Corp Method and device for ultrasonic flaw detection
JPS59101139A (en) * 1982-11-30 1984-06-11 株式会社　日立メデイコ Ultrasonic tomographic apparatus
JPS61110074A (en) * 1984-11-02 1986-05-28 Hitachi Ltd Underwater object detection method
JPH02164347A (en) * 1988-12-16 1990-06-25 Aloka Co Ltd Ultrasonic diagnostic device
EP0224014B1 (en) * 1985-10-31 1992-04-01 General Electric Company Variable focusing in ultrasound imaging using non-uniform sampling
JP2008131718A (en) * 2006-11-20 2008-06-05 Shimadzu Corp Synchronous motor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4931346A (en) * 1972-02-11 1974-03-20
JPS4953464A (en) * 1972-09-22 1974-05-24

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4931346A (en) * 1972-02-11 1974-03-20
JPS4953464A (en) * 1972-09-22 1974-05-24

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58139088A (en) * 1982-02-13 1983-08-18 Furuno Electric Co Ltd Detected information display
JPS58214867A (en) * 1982-06-08 1983-12-14 Furuno Electric Co Ltd Wide range directional underwater detecting apparatus
JPS597260A (en) * 1982-07-05 1984-01-14 Toshiba Corp Method and device for ultrasonic flaw detection
JPS59101139A (en) * 1982-11-30 1984-06-11 株式会社　日立メデイコ Ultrasonic tomographic apparatus
JPS61110074A (en) * 1984-11-02 1986-05-28 Hitachi Ltd Underwater object detection method
EP0224014B1 (en) * 1985-10-31 1992-04-01 General Electric Company Variable focusing in ultrasound imaging using non-uniform sampling
JPH02164347A (en) * 1988-12-16 1990-06-25 Aloka Co Ltd Ultrasonic diagnostic device
JP2008131718A (en) * 2006-11-20 2008-06-05 Shimadzu Corp Synchronous motor

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