FR2445535A1 - Appareil de mesure de distance a emission continue modulee en frequence avec une linearite amelioree - Google Patents

Appareil de mesure de distance a emission continue modulee en frequence avec une linearite amelioree

Info

Publication number
FR2445535A1
FR2445535A1 FR7836312A FR7836312A FR2445535A1 FR 2445535 A1 FR2445535 A1 FR 2445535A1 FR 7836312 A FR7836312 A FR 7836312A FR 7836312 A FR7836312 A FR 7836312A FR 2445535 A1 FR2445535 A1 FR 2445535A1
Authority
FR
France
Prior art keywords
modulator
linearity
signal
measurement device
distance measurement
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.)
Granted
Application number
FR7836312A
Other languages
English (en)
Other versions
FR2445535B1 (fr
Inventor
Jean-Pierre Tomasi
Tomasi Jean-Pierre
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.)
Telecommunications Radioelectriques et Telephoniques SA TRT
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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 Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Priority to FR7836312A priority Critical patent/FR2445535A1/fr
Priority to US06/094,610 priority patent/US4276549A/en
Priority to DE19792951143 priority patent/DE2951143A1/de
Priority to GB7944025A priority patent/GB2040133B/en
Priority to JP16773579A priority patent/JPS5590875A/ja
Publication of FR2445535A1 publication Critical patent/FR2445535A1/fr
Application granted granted Critical
Publication of FR2445535B1 publication Critical patent/FR2445535B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B23/00—Generation of oscillations periodically swept over a predetermined frequency range
    • 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
    • G01S13/341—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 wherein the rate of change of the transmitted frequency is adjusted to give a beat of predetermined constant frequency, e.g. by adjusting the amplitude or frequency of the frequency-modulating 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/40—Means for monitoring or calibrating
    • G01S7/4004—Means for monitoring or calibrating of parts of a radar system
    • G01S7/4008—Means for monitoring or calibrating of parts of a radar system of transmitters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/0068—Frequency or FM detection
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/0092—Measures to linearise or reduce distortion of oscillator characteristics

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

Cet appareil, notamment un radioaltimètre, comporte, dans une boucle d'asservissement, un générateur d'un signal hyperfréquence, un mélangeur qui délivre un signal de battement entre l'onde émise et l'onde reçue, un discriminateur de fréquence, un intégrateur-anamorphoseur et un modulateur qui délivre une tension en dents de scie pour commander le générateur. La durée T des dents de scie est en relation linéaire avec la distance à mesurer. Selon l'invention, afin d'améliorer la linéarité du signal d'émission, une boucle numérique connectée entre le discriminateur et le modulateur comporte en cascade un dispositif à seuils, un additionneur, une mémoire et un convertisseur numérique analogique. Un organe de découpage relie le modulateur à la mémoire. La non-linéarité du signal émis étant réduite des trois quarts il est possible d'introduire un filtre passe-bas en sortie du mélangeur, ce qui améliore la précision sur T et donc sur la distance à mesurer. Application : amélioration de la précision des radio-altimètres à modulation de fréquence.
FR7836312A 1978-12-26 1978-12-26 Appareil de mesure de distance a emission continue modulee en frequence avec une linearite amelioree Granted FR2445535A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR7836312A FR2445535A1 (fr) 1978-12-26 1978-12-26 Appareil de mesure de distance a emission continue modulee en frequence avec une linearite amelioree
US06/094,610 US4276549A (en) 1978-12-26 1979-11-15 FM-CW Radar distance measuring apparatus
DE19792951143 DE2951143A1 (de) 1978-12-26 1979-12-19 Fm-cw-radarabstandsmessgeraet
GB7944025A GB2040133B (en) 1978-12-26 1979-12-21 Fm cw radar distance measuring apparatus
JP16773579A JPS5590875A (en) 1978-12-26 1979-12-25 Fmmcw radar type distance measuring meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7836312A FR2445535A1 (fr) 1978-12-26 1978-12-26 Appareil de mesure de distance a emission continue modulee en frequence avec une linearite amelioree

Publications (2)

Publication Number Publication Date
FR2445535A1 true FR2445535A1 (fr) 1980-07-25
FR2445535B1 FR2445535B1 (fr) 1983-03-25

Family

ID=9216517

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7836312A Granted FR2445535A1 (fr) 1978-12-26 1978-12-26 Appareil de mesure de distance a emission continue modulee en frequence avec une linearite amelioree

Country Status (5)

Country Link
US (1) US4276549A (fr)
JP (1) JPS5590875A (fr)
DE (1) DE2951143A1 (fr)
FR (1) FR2445535A1 (fr)
GB (1) GB2040133B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0505121A3 (en) * 1991-03-22 1993-08-11 Gec-Marconi Limited Frequency control circuitry
FR2731804A1 (fr) * 1989-11-17 1996-09-20 Diehl Gmbh & Co Capteur a ondes millimetriques continues module lineairement en frequence

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496274A1 (fr) * 1980-12-12 1982-06-18 Trt Telecom Radio Electr Procede de mesure de distance par radar a onde entretenue modulee en frequence, appareil pour la mise en oeuvre du procede et application a la determination precise du niveau de liquide dans un reservoir
US4468638A (en) * 1982-02-11 1984-08-28 The Bendix Corporation Linear sweep frequency modulator for FM/CW radio altimeter
US4599618A (en) * 1982-07-26 1986-07-08 Rockwell International Corporation Nearest return tracking in an FMCW system
US4620192A (en) * 1983-09-29 1986-10-28 Raytheon Company Continuous wave radar with ranging capability
DE3342057A1 (de) * 1983-11-22 1985-05-30 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Regelung der linearitaet
FR2566921B1 (fr) * 1984-06-29 1987-12-18 Thomson Csf Radioaltimetre a modulation de frequence
US4692766A (en) * 1985-09-25 1987-09-08 Rolfs John C Linearizer frequency discriminator for frequency modulated radar transmitters
US6882301B2 (en) * 1986-06-03 2005-04-19 Time Domain Corporation Time domain radio transmission system
US4806935A (en) * 1987-09-17 1989-02-21 Fosket Timothy G Closed loop velocity/altitude sensor for FM-CW doppler radars
DE19538309C2 (de) * 1995-10-14 1998-10-15 Volkswagen Ag Radarverfahren zur Messung von Abständen und Relativgeschwindigkeiten zwischen einem Fahrzeug und einem oder mehreren Hindernissen
RU2133483C1 (ru) * 1998-04-21 1999-07-20 Уральское проектно-конструкторское бюро "Деталь" Частотно-модулированный высотомер
JP3411856B2 (ja) 1999-07-26 2003-06-03 松下電器産業株式会社 距離検出方法及び距離検出装置
JP3879966B2 (ja) * 2000-09-07 2007-02-14 株式会社ホンダエレシス 周波数変調レーダ、及び、レーダの周波数変調方法
JP4111853B2 (ja) * 2003-03-25 2008-07-02 富士通テン株式会社 送受信共用ｆｍ−ｃｗレーダ装置及びｆｍ−ｃｗレーダの信号処理方法
RU2273862C1 (ru) * 2004-08-12 2006-04-10 Владимир Михайлович Жуков Рециркуляционный радиовысотомер
GB0421520D0 (en) * 2004-09-28 2004-10-27 Qinetiq Ltd Frequency modulated continuous wave (FMCW) radar having improved frquency sweep linearity
US8131215B2 (en) * 2008-12-15 2012-03-06 Motorola Solutions, Inc. Method and apparatus for determining location of a communication device
KR100969879B1 (ko) * 2009-11-13 2010-07-13 엘아이지넥스원 주식회사 비행체의 고도 측정 장치, 고도 측정 방법 및 고도 측정 프로그램이 기록된 기록 매체

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3221266A (en) * 1964-03-03 1965-11-30 Hewlett Packard Co Linear sweep frequency generator
US3514718A (en) * 1967-08-30 1970-05-26 Cornell Aeronautical Labor Inc Apparatus for linearizing the output frequency variation rate of voltage tunable oscillators or the like
US3621450A (en) * 1969-12-15 1971-11-16 Goodyear Aerospace Corp Linear sweep frequency generator with sampling circuit phase control loop
US3699448A (en) * 1971-02-08 1972-10-17 Gregory L Martin Precision generation of linear f. m. signal
US3931586A (en) * 1975-03-21 1976-01-06 The United States Of America As Represented By The Secretary Of The Navy Scanning oscillator stabilization
US4038612A (en) * 1976-05-21 1977-07-26 International Telephone And Telegraph Corporation Swept oscillator automatic linearizer
FR2344031A1 (fr) * 1976-03-12 1977-10-07 Trt Telecom Radio Electr Appareil a modulation de frequence destine a des mesures de distance de haute precision
US4129832A (en) * 1977-06-20 1978-12-12 Harris Corporation Method and means for linearizing a voltage controlled oscillator sweep generator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928085A (en) * 1957-02-06 1960-03-08 Itt Radio altimeter systems
FR2343258A1 (fr) * 1976-07-01 1977-09-30 Trt Telecom Radio Electr Systeme radioelectrique de localisation d'un objet determine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3221266A (en) * 1964-03-03 1965-11-30 Hewlett Packard Co Linear sweep frequency generator
US3514718A (en) * 1967-08-30 1970-05-26 Cornell Aeronautical Labor Inc Apparatus for linearizing the output frequency variation rate of voltage tunable oscillators or the like
US3621450A (en) * 1969-12-15 1971-11-16 Goodyear Aerospace Corp Linear sweep frequency generator with sampling circuit phase control loop
US3699448A (en) * 1971-02-08 1972-10-17 Gregory L Martin Precision generation of linear f. m. signal
US3931586A (en) * 1975-03-21 1976-01-06 The United States Of America As Represented By The Secretary Of The Navy Scanning oscillator stabilization
FR2344031A1 (fr) * 1976-03-12 1977-10-07 Trt Telecom Radio Electr Appareil a modulation de frequence destine a des mesures de distance de haute precision
US4038612A (en) * 1976-05-21 1977-07-26 International Telephone And Telegraph Corporation Swept oscillator automatic linearizer
US4129832A (en) * 1977-06-20 1978-12-12 Harris Corporation Method and means for linearizing a voltage controlled oscillator sweep generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2731804A1 (fr) * 1989-11-17 1996-09-20 Diehl Gmbh & Co Capteur a ondes millimetriques continues module lineairement en frequence
EP0505121A3 (en) * 1991-03-22 1993-08-11 Gec-Marconi Limited Frequency control circuitry

Also Published As

Publication number Publication date
DE2951143C2 (fr) 1988-02-18
GB2040133A (en) 1980-08-20
FR2445535B1 (fr) 1983-03-25
DE2951143A1 (de) 1980-07-24
JPS5590875A (en) 1980-07-09
US4276549A (en) 1981-06-30
GB2040133B (en) 1983-05-05

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