JPS5777975A - Improving method for precision of measurement of fm radar device - Google Patents

Improving method for precision of measurement of fm radar device

Info

Publication number
JPS5777975A
JPS5777975A JP15348680A JP15348680A JPS5777975A JP S5777975 A JPS5777975 A JP S5777975A JP 15348680 A JP15348680 A JP 15348680A JP 15348680 A JP15348680 A JP 15348680A JP S5777975 A JPS5777975 A JP S5777975A
Authority
JP
Japan
Prior art keywords
signal
measurement
time
difference
caused
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
JP15348680A
Other languages
Japanese (ja)
Inventor
Soichi Ishikawa
Minoru Uozumi
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
Toyota Jidosha Kogyo 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 Toyota Motor Corp, Toyota Jidosha Kogyo KK filed Critical Toyota Motor Corp
Priority to JP15348680A priority Critical patent/JPS5777975A/en
Publication of JPS5777975A publication Critical patent/JPS5777975A/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
    • G01S13/36—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal

Landscapes

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

Abstract

PURPOSE:To enable constant correct measurement at a time when a distance is measured for a long time and thereby to improve the precision of measurement, by renewing timely the waveform of the distortion of a beat wave signal for measuring a frequency. CONSTITUTION:When a change in phase of pi is caused in the beat wave signal S with the vertical motion of a substance 100, the maximum and minumum values of the signal S at the point of time of sampling based on a clock pulse 12 which is higher than the signal S are memorized 14 throughout an area of a time for measurement. The difference between the maximum and minimum values which are memorized is calculated 16 at the point of time when the change of pi is caused in the signal S, the waveform of the distortion caused in a microwave circuit 2 or by multiple reflection, etc. is memorized, the signal S is modified 4 in a substracting manner, and thereby a signal S' for measurement is obtained. And, the difference between the maximum and minimum values within a distance obtained from the signal S' and within the period wherein the change in phase of pi is caused in the signal S' are calculated 22-23, the deviation of the value of the difference thus obtained from a thoretical value 25 of the difference in distance which causes pi in the signal S' is calculated 24, and when the deviation exceeds a prescribed value 28, the waveform 14 of the distortion is renewed.
JP15348680A 1980-10-31 1980-10-31 Improving method for precision of measurement of fm radar device Pending JPS5777975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15348680A JPS5777975A (en) 1980-10-31 1980-10-31 Improving method for precision of measurement of fm radar device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15348680A JPS5777975A (en) 1980-10-31 1980-10-31 Improving method for precision of measurement of fm radar device

Publications (1)

Publication Number Publication Date
JPS5777975A true JPS5777975A (en) 1982-05-15

Family

ID=15563616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15348680A Pending JPS5777975A (en) 1980-10-31 1980-10-31 Improving method for precision of measurement of fm radar device

Country Status (1)

Country Link
JP (1) JPS5777975A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018197697A (en) * 2017-05-24 2018-12-13 新日本無線株式会社 Radio wave sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018197697A (en) * 2017-05-24 2018-12-13 新日本無線株式会社 Radio wave sensor

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