JPS56141573A - Ground speed meter - Google Patents

Ground speed meter

Info

Publication number
JPS56141573A
JPS56141573A JP4539780A JP4539780A JPS56141573A JP S56141573 A JPS56141573 A JP S56141573A JP 4539780 A JP4539780 A JP 4539780A JP 4539780 A JP4539780 A JP 4539780A JP S56141573 A JPS56141573 A JP S56141573A
Authority
JP
Japan
Prior art keywords
moving object
output
ground speed
speed
reflected wave
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
JP4539780A
Other languages
Japanese (ja)
Inventor
Jun Furubayashi
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.)
Toshin Electric Co Ltd
Original Assignee
Toshin Electric 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 Toshin Electric Co Ltd filed Critical Toshin Electric Co Ltd
Priority to JP4539780A priority Critical patent/JPS56141573A/en
Publication of JPS56141573A publication Critical patent/JPS56141573A/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)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To know the ground speed of a moving object by forming a secondary power source on the ground surface in front of the moving object, and detecting the reflected waves which do not abide by the rule of reflection from that sound source in a ground speed meter utilizing ultrasonic waves. CONSTITUTION:A transceiver is provided to a moving object. The ultrasonic wave signal (e) generated in a transmission signal generating circuit 12 is projected from a transmitter T to the front ground surface. The reflected wave thereof is received in a receiver R and is amplified by a high-frequency amplifier 1. The output of the amplifier 1 is mixed in a mixer 2, by which the frequency of the difference between the respective frequencies fR and fL of the reflected wave and a local oscillator is obtained. The output of the mixer enters an analog multiplexer 3, from which the output corresponding to the timing in which the reflected wave exists is taken out and is applied to a BPF5. If the moving object is moving at a preset speed, an output is produced, and an electronic buzzer 7 is driven, thereby announcing that it is a normal speed. With such constitution, the ground speed of the moving object is known.
JP4539780A 1980-04-07 1980-04-07 Ground speed meter Pending JPS56141573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4539780A JPS56141573A (en) 1980-04-07 1980-04-07 Ground speed meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4539780A JPS56141573A (en) 1980-04-07 1980-04-07 Ground speed meter

Publications (1)

Publication Number Publication Date
JPS56141573A true JPS56141573A (en) 1981-11-05

Family

ID=12718118

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4539780A Pending JPS56141573A (en) 1980-04-07 1980-04-07 Ground speed meter

Country Status (1)

Country Link
JP (1) JPS56141573A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62105075A (en) * 1985-10-31 1987-05-15 Furuno Electric Co Ltd Fish detecting method
JPS62102184U (en) * 1985-12-18 1987-06-29

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4931364A (en) * 1972-07-11 1974-03-20
JPS4938674A (en) * 1972-08-11 1974-04-10

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4931364A (en) * 1972-07-11 1974-03-20
JPS4938674A (en) * 1972-08-11 1974-04-10

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62105075A (en) * 1985-10-31 1987-05-15 Furuno Electric Co Ltd Fish detecting method
JPH0362230B2 (en) * 1985-10-31 1991-09-25 Furuno Electric Co
JPS62102184U (en) * 1985-12-18 1987-06-29

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