JPS57110970A - Discrimination of target by ultrasonic wave - Google Patents

Discrimination of target by ultrasonic wave

Info

Publication number
JPS57110970A
JPS57110970A JP18604780A JP18604780A JPS57110970A JP S57110970 A JPS57110970 A JP S57110970A JP 18604780 A JP18604780 A JP 18604780A JP 18604780 A JP18604780 A JP 18604780A JP S57110970 A JPS57110970 A JP S57110970A
Authority
JP
Japan
Prior art keywords
target
reflection
discrimination
level
signal
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
JP18604780A
Other languages
Japanese (ja)
Inventor
Hisashi Miyazawa
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.)
TOUWA SEISAKUSHO KK
TOWA SEISAKUSHO KK
Original Assignee
TOUWA SEISAKUSHO KK
TOWA SEISAKUSHO KK
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 TOUWA SEISAKUSHO KK, TOWA SEISAKUSHO KK filed Critical TOUWA SEISAKUSHO KK
Priority to JP18604780A priority Critical patent/JPS57110970A/en
Publication of JPS57110970A publication Critical patent/JPS57110970A/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
    • G01S7/534—Details of non-pulse systems
    • G01S7/536—Extracting wanted echo signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To facilitate the discrimination of targets emphasizing reflection information from the targets with a substantial ratio taken between a reflection signal from the target and a reflection signal from a specific reference surface. CONSTITUTION:The level of a received signal by reflection from the sea bottom 10 as the reference surface is expressed by e2 and the level of a received signal by reflection from a target 11 is expressed by e3. When a ratio e3/e2=A is used, A=0 because of e3=0 where a transmitter/receiver 12 located at the positions (a) or (c) as shown in the drawing does not receive a reflected wave from the target 11. Where the transmitter/receiver 12 located at the position (b) receives the reflected wave from the target 11, A gives a large value because the level of the signal e2 is small. Thus, a greater level of the information highly facilitates the discrimination of the target.
JP18604780A 1980-12-27 1980-12-27 Discrimination of target by ultrasonic wave Pending JPS57110970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18604780A JPS57110970A (en) 1980-12-27 1980-12-27 Discrimination of target by ultrasonic wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18604780A JPS57110970A (en) 1980-12-27 1980-12-27 Discrimination of target by ultrasonic wave

Publications (1)

Publication Number Publication Date
JPS57110970A true JPS57110970A (en) 1982-07-10

Family

ID=16181463

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18604780A Pending JPS57110970A (en) 1980-12-27 1980-12-27 Discrimination of target by ultrasonic wave

Country Status (1)

Country Link
JP (1) JPS57110970A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59225313A (en) * 1983-06-06 1984-12-18 Matsushita Electric Ind Co Ltd Apparatus for detecting shape of object to be measured

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS495720U (en) * 1972-04-14 1974-01-18
JPS4911156A (en) * 1972-05-29 1974-01-31

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS495720U (en) * 1972-04-14 1974-01-18
JPS4911156A (en) * 1972-05-29 1974-01-31

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59225313A (en) * 1983-06-06 1984-12-18 Matsushita Electric Ind Co Ltd Apparatus for detecting shape of object to be measured
JPH0334596B2 (en) * 1983-06-06 1991-05-23 Matsushita Electric Ind Co Ltd

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