JPS56138263A - Sailing speed measuring instrument of ship and the like - Google Patents

Sailing speed measuring instrument of ship and the like

Info

Publication number
JPS56138263A
JPS56138263A JP4217780A JP4217780A JPS56138263A JP S56138263 A JPS56138263 A JP S56138263A JP 4217780 A JP4217780 A JP 4217780A JP 4217780 A JP4217780 A JP 4217780A JP S56138263 A JPS56138263 A JP S56138263A
Authority
JP
Japan
Prior art keywords
counter
input
period
speed
computer
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
JP4217780A
Other languages
Japanese (ja)
Inventor
Shoji Kobayashi
Katsufumi Kashiwagi
Yoshihisa Kawamura
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.)
Kawasaki Heavy Industries Ltd
Original Assignee
Kawasaki Heavy Industries 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 Kawasaki Heavy Industries Ltd filed Critical Kawasaki Heavy Industries Ltd
Priority to JP4217780A priority Critical patent/JPS56138263A/en
Publication of JPS56138263A publication Critical patent/JPS56138263A/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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50—Systems of measurement, based on relative movement of the target
    • G01S15/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S15/60—Velocity or trajectory determination systems; Sense-of-movement determination systems wherein the transmitter and receiver are mounted on the moving object, e.g. for determining ground speed, drift angle, ground track

Landscapes

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

Abstract

PURPOSE:To make it possible to exactly derive an instantaneous sailing speed in a short time, by adopting the count-down system for which two general period counters have been used. CONSTITUTION:A Doppler beat which is received is input to the period counter A, by which the Doppler beat is counted in accordance with a high speed pulse train DELTAgamma whose frequency is enough high. And, in the counter A, whenever overflow occurs in the course of counting one period of the Doppler beat, it is input to the counter A', the number of times of this overflow is measured, and its value N' is input to the computer system B as a digital signal. At the same time, when counting has been finished, the count value (n) of the counter A is input as a digital value of the computer (b). In the system B, the inputs from the counters A, A' are processed, and the speed is calculated and displayed. In this case, a speed calculating time is that which has added a period calculating time and a processing time of the digital computer.
JP4217780A 1980-03-31 1980-03-31 Sailing speed measuring instrument of ship and the like Pending JPS56138263A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4217780A JPS56138263A (en) 1980-03-31 1980-03-31 Sailing speed measuring instrument of ship and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4217780A JPS56138263A (en) 1980-03-31 1980-03-31 Sailing speed measuring instrument of ship and the like

Publications (1)

Publication Number Publication Date
JPS56138263A true JPS56138263A (en) 1981-10-28

Family

ID=12628696

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4217780A Pending JPS56138263A (en) 1980-03-31 1980-03-31 Sailing speed measuring instrument of ship and the like

Country Status (1)

Country Link
JP (1) JPS56138263A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5130476A (en) * 1974-09-09 1976-03-15 Tokyo Shibaura Electric Co HANDOTAIUE HANOSEIZOHOHO

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5130476A (en) * 1974-09-09 1976-03-15 Tokyo Shibaura Electric Co HANDOTAIUE HANOSEIZOHOHO

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