GB892986A - Selective range detecting system - Google Patents

Selective range detecting system

Info

Publication number
GB892986A
GB892986A GB9162/60A GB916260A GB892986A GB 892986 A GB892986 A GB 892986A GB 9162/60 A GB9162/60 A GB 9162/60A GB 916260 A GB916260 A GB 916260A GB 892986 A GB892986 A GB 892986A
Authority
GB
United Kingdom
Prior art keywords
frequency
objects
give
oscillator
beat
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.)
Expired
Application number
GB9162/60A
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.)
Bendix Corp
Original Assignee
Bendix 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 Bendix Corp filed Critical Bendix Corp
Publication of GB892986A publication Critical patent/GB892986A/en
Expired 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
    • 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
    • G01S13/583—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets
    • G01S13/584—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets adapted for simultaneous range and velocity measurements
    • 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
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

892,986. Doppler radar. BENDIX CORPORATION. March 15, 1960 [March 30, 1959], No. 9162/60. Class 40(7). In a C.W. Doppler radar or like sonic or ultrasonic system in which the transmitted and received signals are heterodyned to give a beat signal indicative of the relative radial velocity of the reflecting object, the frequency of the transmitted signal is varied in discrete steps of magnitude #F and duration t, Fig. 5, so that objects within a range corresponding to an echo time t will produce a beat signal component of frequency Fd equal to the Doppler frequency which may be selected by a low-pass filter and objects within range limits corresponding to echo times (n-1)t and (n-1)t will produce beat frequency components n#F + Fd which may be selected by a band-pass filter having a centre frequency n#F. The invention is described as applied to a vehicle Doppler radar for determining the sense of the radial velocity as described in Specification 888,975 in which the echo signal is heterodyned separately in detectors 40, 42 with phase quadrature outputs from the transmitter klystron oscillator 26 to give phase quadrature Doppler frequency signals which are applied through amplifiers 54, 56 to a velocity sense discriminator 58, 60, 62. According to the present invention beat frequency components corresponding to objects within predetermined range limits are selected by applying the outputs from the detectors 40, 42 to the amplifiers 54, 56 through lowpass or band-pass filters 50, 52 and by varying the frequency of the klystron 26 as shown in Fig. 5 by means of a corresponding voltage waveform produced by applying the output, Fig. 2, from an oscillator 20 to a squarer and differentiator 22 to give a pulse train, Fig. 4, of recurrence period t which is integrated at 24, the output from the integrator 24 being restored to its initial value after a period T by a blocking-oscillator discharge circuit 28.
GB9162/60A 1959-03-30 1960-03-15 Selective range detecting system Expired GB892986A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US892986XA 1959-03-30 1959-03-30

Publications (1)

Publication Number Publication Date
GB892986A true GB892986A (en) 1962-04-04

Family

ID=22216841

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9162/60A Expired GB892986A (en) 1959-03-30 1960-03-15 Selective range detecting system

Country Status (2)

Country Link
DE (1) DE1213493B (en)
GB (1) GB892986A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139035A (en) * 1983-03-18 1984-10-31 Marconi Co Ltd Radar vehicle braking control
FR2566921A1 (en) * 1984-06-29 1986-01-03 Thomson Csf FREQUENCY MODULATION RADIOALTIMETER

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE855586C (en) * 1944-01-18 1952-11-13 Patelhold Patentverwertung Wireless rangefinder
DE911663C (en) * 1944-08-05 1954-05-17 Pintsch Electro G M B H Method for checking, in particular for determining the distance of objects according to the reflection principle by pulse-wise emission and re-reception of high-frequency oscillations
US2842764A (en) * 1951-02-21 1958-07-08 Sylvania Electric Prod Collision warning radar
DE1010302B (en) * 1956-12-22 1957-06-13 Telefunken Gmbh An arrangement for speed measurement that works according to the retro-reflective principle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139035A (en) * 1983-03-18 1984-10-31 Marconi Co Ltd Radar vehicle braking control
FR2566921A1 (en) * 1984-06-29 1986-01-03 Thomson Csf FREQUENCY MODULATION RADIOALTIMETER
EP0170557A1 (en) * 1984-06-29 1986-02-05 Thomson-Csf Frequency-modulated radio-altimeter

Also Published As

Publication number Publication date
DE1213493B (en) 1966-03-31

Similar Documents

Publication Publication Date Title
GB1420513A (en) Range measurement pulse radar system
US2431854A (en) Apparatus for suppressing reverberation
CA1074002A (en) Method and apparatus for determining the flow state of flowable substances
US3183506A (en) Radar ranging receiver
US2776426A (en) Moving target range tracking unit
GB1266071A (en)
GB892986A (en) Selective range detecting system
GB626236A (en) Improvements in or relating to radar systems
GB985575A (en) Vehicle detection and speed measuring apparatus
US3614721A (en) Control apparatus
US3202960A (en) Ultrasonic doppler speed measurement device
US3038142A (en) Sonic altimeter
US2650357A (en) Delay controlled pulse generator
GB983900A (en) Improvements in or relating to radar systems
US3602812A (en) Measuring the relative phases of sequential signal bursts
US3222602A (en) Apparatus for double cancellation utilizing one delay line in a moving target indicating system
GB1437269A (en) Signal processing circuitry
US3495242A (en) Automatic correlation circuits
GB778147A (en) Improvements in or relating to pulsed radar systems
GB599602A (en) Means for exact reading of the phase position of an arbitrary impulse in a periodically recurrent series of impulses
US3351896A (en) Underwater target detection system
GB1322848A (en) Electric pulse transmission systems
GB1489923A (en) Frequency measuring arrangement
US3184737A (en) Radar system
GB656094A (en) Improvements in or relating to radar systems