JPS56108974A - Doppler radar apparatus - Google Patents

Doppler radar apparatus

Info

Publication number
JPS56108974A
JPS56108974A JP1162680A JP1162680A JPS56108974A JP S56108974 A JPS56108974 A JP S56108974A JP 1162680 A JP1162680 A JP 1162680A JP 1162680 A JP1162680 A JP 1162680A JP S56108974 A JPS56108974 A JP S56108974A
Authority
JP
Japan
Prior art keywords
pulse width
output
outputted
pulses
sampling errors
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
JP1162680A
Other languages
Japanese (ja)
Inventor
Junichiro Tsurumaru
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1162680A priority Critical patent/JPS56108974A/en
Publication of JPS56108974A publication Critical patent/JPS56108974A/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
    • G01S13/38—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 wherein more than one modulation frequency is used
    • 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
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S13/581—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of interrupted pulse modulated waves and based upon the Doppler effect resulting from movement of targets

Landscapes

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

Abstract

PURPOSE:To decrease sampling errors when the speed of a moving object is low by performing time compression of pulse width. CONSTITUTION:In a converting part 7, the output 6a of a control part 6 is inputted and the pulses having the pulse width VA=A.V<1/2> with respect to the numerical value V of the input are outputted. Here, A is the constant consisting of an arbitrary positive number, V is a measuring speed and VA is a pulse width. Every time when one of moving objects such as automobiles is measured, the pulse having the pulse width VA is outputted from an output terminal 8. In this way, the apparatus is so arranged as to output the pulses having the pulse width proportional to the square root of speeds, whereby sampling errors 16 decreased considerably.
JP1162680A 1980-02-01 1980-02-01 Doppler radar apparatus Pending JPS56108974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1162680A JPS56108974A (en) 1980-02-01 1980-02-01 Doppler radar apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1162680A JPS56108974A (en) 1980-02-01 1980-02-01 Doppler radar apparatus

Publications (1)

Publication Number Publication Date
JPS56108974A true JPS56108974A (en) 1981-08-28

Family

ID=11783131

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1162680A Pending JPS56108974A (en) 1980-02-01 1980-02-01 Doppler radar apparatus

Country Status (1)

Country Link
JP (1) JPS56108974A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54111799A (en) * 1978-02-21 1979-09-01 Mitsubishi Electric Corp Doppler radar unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54111799A (en) * 1978-02-21 1979-09-01 Mitsubishi Electric Corp Doppler radar unit

Similar Documents

Publication Publication Date Title
GB1526779A (en) Impact impulse measuring devices
JPS56108974A (en) Doppler radar apparatus
JPS57131085A (en) Ultrasonic wave measuring system
JPS56108975A (en) Doppler radar apparatus
SU1605229A1 (en) Generator of random pulse stream
SU692101A1 (en) Apparatus for measuring parameters of a pulse pack
SU902119A1 (en) Standard attenuator
JPS53139074A (en) Numerical control device
JPS5499884A (en) Variafble sample period controller
SU492900A1 (en) Angle Code Transducer
SU685987A1 (en) Digital shafr acceleration meter
JPS5444581A (en) Beam diameter measuring apparatus
GB1352497A (en) Vehicle testing apparatus and safety devices therefor
JPS56138253A (en) Period measuring instrument
SU980019A1 (en) Method of discrete measuring of electric pulse duration
SU434419A1 (en)
SU794554A1 (en) Pulse voltmeter
GB1347261A (en) Method and apparatus for measuring the mass transfer rate of material passing through a pump
SU1100582A1 (en) Pulse parameter meter
SU911247A1 (en) Device for substance concentration measurement
SU736822A1 (en) Sampling attenuator
SU735456A1 (en) Apparatus for measuring vehicle speed
JPS5583391A (en) Dial-pulse distortion correction system
JPS5539035A (en) Ultrasonic flow meter
SU617818A1 (en) Pulse train shaper