JPS5596472A - Distance measuring method employing microwave - Google Patents

Distance measuring method employing microwave

Info

Publication number
JPS5596472A
JPS5596472A JP337679A JP337679A JPS5596472A JP S5596472 A JPS5596472 A JP S5596472A JP 337679 A JP337679 A JP 337679A JP 337679 A JP337679 A JP 337679A JP S5596472 A JPS5596472 A JP S5596472A
Authority
JP
Japan
Prior art keywords
frequency
beat
wave
microwave
deltat
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
JP337679A
Other languages
Japanese (ja)
Inventor
Minoru Uozumi
Soichi Ishikawa
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP337679A priority Critical patent/JPS5596472A/en
Publication of JPS5596472A publication Critical patent/JPS5596472A/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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • G01S13/345—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using triangular modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To decrease the fixed errors and shorten the time of response by counting the number n of beat pulses during the repeated frequency of a microwave and determining the value A through multiplication of the repeated frequency by 1/n and the frequency B of the beat wave. CONSTITUTION:A microwave modulated by a given repeated frequency is radiated. The radiating wave 15 and the reflecting wave 16 are arranged to form a beat wave 17. A beat pulse is formed related to the frequency of the beat wave. The number n of the beat pulses during the repeated frequency of the microwave is counted and the value A is determined through multiplification of the repeated frequency by 1/n. The frequency B of the beat wave is subtracted from the value A to determine DELTAT'. Based on the list previously obtained from the relation between DELTAT' and the distance R to the surface to be measured, the actual distance R is determined corresponding to the above mentioned DELTAT'.
JP337679A 1979-01-18 1979-01-18 Distance measuring method employing microwave Pending JPS5596472A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP337679A JPS5596472A (en) 1979-01-18 1979-01-18 Distance measuring method employing microwave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP337679A JPS5596472A (en) 1979-01-18 1979-01-18 Distance measuring method employing microwave

Publications (1)

Publication Number Publication Date
JPS5596472A true JPS5596472A (en) 1980-07-22

Family

ID=11555627

Family Applications (1)

Application Number Title Priority Date Filing Date
JP337679A Pending JPS5596472A (en) 1979-01-18 1979-01-18 Distance measuring method employing microwave

Country Status (1)

Country Link
JP (1) JPS5596472A (en)

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