JPS57201805A - Ultrasonic diagnostic device - Google Patents

Ultrasonic diagnostic device

Info

Publication number
JPS57201805A
JPS57201805A JP56086992A JP8699281A JPS57201805A JP S57201805 A JPS57201805 A JP S57201805A JP 56086992 A JP56086992 A JP 56086992A JP 8699281 A JP8699281 A JP 8699281A JP S57201805 A JPS57201805 A JP S57201805A
Authority
JP
Japan
Prior art keywords
signal
impulse
frequency
delay line
variable delay
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.)
Granted
Application number
JP56086992A
Other languages
Japanese (ja)
Other versions
JPS6359105B2 (en
Inventor
Hiromichi Kikuchi
Takashi Hitai
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
Aloka Co 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 Aloka Co Ltd filed Critical Aloka Co Ltd
Priority to JP56086992A priority Critical patent/JPS57201805A/en
Publication of JPS57201805A publication Critical patent/JPS57201805A/en
Publication of JPS6359105B2 publication Critical patent/JPS6359105B2/ja
Granted 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)

Abstract

PURPOSE:To obtain a high ultrasonic picture sensitivity with a low momentary transmission output in an ultrasonic transmitting and receiving device, by using a variable delay line to convert the impulse to chirp pulses for the transmission and to convert them to an impulse for the receiving. CONSTITUTION:An excited pulse signal 100 is shaped to an impulse signal 102. The impulse 102 is converted to chirp pulses 106 by an expanding circuit using a variable delay line which has a longer delay time for higher frequency components. Frequencies f1 and f2 of chirp pulses are reduced by components corresponding to a frequency fL in a frequency converting circuit. Ultra sonic waves are transmitted with a signal 108 of this conversion result to receive the echo. Since an ultrasonic transmitter and receiver has the transfer characteristics where the gain is low except DELTAf=f2-f1, low-frequency compo nents of a receiving signal 114 are reduced. A signal 116 which is subjected such frequency reverse conversion that f1-fL=f2 is true is compressed by the variable delay line to obtain pulses 118, and the amplitude is amplified (DELTAf.DELTAT) <1/2>(T=t2-t1) times.
JP56086992A 1981-06-08 1981-06-08 Ultrasonic diagnostic device Granted JPS57201805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56086992A JPS57201805A (en) 1981-06-08 1981-06-08 Ultrasonic diagnostic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56086992A JPS57201805A (en) 1981-06-08 1981-06-08 Ultrasonic diagnostic device

Publications (2)

Publication Number Publication Date
JPS57201805A true JPS57201805A (en) 1982-12-10
JPS6359105B2 JPS6359105B2 (en) 1988-11-17

Family

ID=13902360

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56086992A Granted JPS57201805A (en) 1981-06-08 1981-06-08 Ultrasonic diagnostic device

Country Status (1)

Country Link
JP (1) JPS57201805A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS617465A (en) * 1984-06-20 1986-01-14 Mitsubishi Electric Corp Ultrasonic wave tester
JPH01147806U (en) * 1988-03-31 1989-10-12

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5223286A (en) * 1975-08-14 1977-02-22 Raytheon Co Signal processor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5223286A (en) * 1975-08-14 1977-02-22 Raytheon Co Signal processor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS617465A (en) * 1984-06-20 1986-01-14 Mitsubishi Electric Corp Ultrasonic wave tester
JPH0552461B2 (en) * 1984-06-20 1993-08-05 Mitsubishi Electric Corp
JPH01147806U (en) * 1988-03-31 1989-10-12

Also Published As

Publication number Publication date
JPS6359105B2 (en) 1988-11-17

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