GB1212046A - Radio altimeter - Google Patents

Radio altimeter

Info

Publication number
GB1212046A
GB1212046A GB43009/68A GB4300968A GB1212046A GB 1212046 A GB1212046 A GB 1212046A GB 43009/68 A GB43009/68 A GB 43009/68A GB 4300968 A GB4300968 A GB 4300968A GB 1212046 A GB1212046 A GB 1212046A
Authority
GB
United Kingdom
Prior art keywords
switch
circuit
closed
voltage
signal
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
GB43009/68A
Other languages
English (en)
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1212046A publication Critical patent/GB1212046A/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
    • 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
    • G01S7/4052—Means for monitoring or calibrating by simulation of echoes
    • G01S7/4056—Means for monitoring or calibrating by simulation of echoes specially adapted to FMCW
    • 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
    • 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
    • G01S13/882—Radar or analogous systems specially adapted for specific applications for altimeters
    • 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
    • G01S7/4052—Means for monitoring or calibrating by simulation of echoes
    • G01S7/406—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder
    • G01S7/4065—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder involving a delay line

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)
  • Geophysics And Detection Of Objects (AREA)
GB43009/68A 1967-09-11 1968-09-10 Radio altimeter Expired GB1212046A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR120554 1967-09-11

Publications (1)

Publication Number Publication Date
GB1212046A true GB1212046A (en) 1970-11-11

Family

ID=8638071

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43009/68A Expired GB1212046A (en) 1967-09-11 1968-09-10 Radio altimeter

Country Status (4)

Country Link
US (1) US3588899A (US07534539-20090519-C00439.png)
BE (1) BE719976A (US07534539-20090519-C00439.png)
FR (1) FR1557670A (US07534539-20090519-C00439.png)
GB (1) GB1212046A (US07534539-20090519-C00439.png)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE791715A (fr) * 1971-12-03 1973-05-22 D Comp Gen Telemetre a modulation de frequence
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
FR2343258A1 (fr) * 1976-07-01 1977-09-30 Trt Telecom Radio Electr Systeme radioelectrique de localisation d'un objet determine
FR2377044A1 (fr) * 1977-01-11 1978-08-04 Labo Cent Telecommunicat Perfectionnements aux radars continus a modulation de frequence
FR2443070A1 (fr) * 1978-12-01 1980-06-27 Trt Telecom Radio Electr Dispositif de radar destine a fournir des informations de distance et de vitesse concernant une cible se deplacant par rapport a lui
US4307398A (en) * 1978-02-21 1981-12-22 Zelex Tracking filter for use in hand held radar device
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
FR2569857B1 (fr) * 1982-10-13 1988-05-13 Trt Telecom Radio Electr Simulateur de retard variable electriquement pour appareil de mesure de distance a onde continue modulee en frequence
FR2573217B1 (fr) * 1984-11-13 1987-01-23 Trt Telecom Radio Electr Simulateur de retards pour appareil de mesure de distance a onde continue modulee en frequence
FR2579760B1 (fr) * 1985-03-29 1987-05-15 Trt Telecom Radio Electr Dispositif pour mesurer la vitesse de defilement d'une surface
DE3830992A1 (de) * 1988-09-12 1990-03-22 Messerschmitt Boelkow Blohm Radarhoehenmesser
FR2646240B1 (fr) * 1989-04-21 1991-06-14 Thomson Trt Defense Dispositif de discrimination d'echos diffuses en volume pour radar de mesure de distance fm/cw et application a un radioaltimetre
US5160933A (en) * 1990-08-28 1992-11-03 Honeywell Inc. Radar altimeter with self-calibration feature
US6426717B1 (en) 2001-05-11 2002-07-30 Rockwell Collins, Inc. Single antenna FM radio altimeter operating in a continuous wave mode and an interrupted continuous wave mode
JP2006010329A (ja) * 2004-06-22 2006-01-12 Fujitsu Ten Ltd レーダのタイミング調整方法およびタイミング自動調整機能を有するレーダ装置
JP2008267839A (ja) * 2007-04-16 2008-11-06 Matsushita Electric Ind Co Ltd レーダシステム
CN102087351B (zh) * 2011-01-31 2014-03-26 浙江省电力公司 电能表检验质量实时监控装置及方法
CN104914403B (zh) * 2015-06-19 2017-08-29 国网天津市电力公司 一种用于直入式三相智能电能表自动化检定系统的电能计量装置检定方法
CN104931916B (zh) * 2015-06-19 2017-07-28 国网天津市电力公司 一种用于接入式三相智能电能表自动化检定系统的重复性试验方法
CN104914399B (zh) * 2015-06-19 2017-08-25 国网天津市电力公司 一种用于单相智能电能表自动化检定系统的电能计量装置检定方法
CN104914400B (zh) * 2015-06-19 2017-07-28 国网天津市电力公司 一种用于接入式三相智能电能表自动化检定系统的电能计量装置检定方法
CN104914395B (zh) * 2015-06-19 2017-07-28 国网天津市电力公司 一种用于单相智能电能表自动化检定系统的检测质量核查方法
JP6978852B2 (ja) * 2017-05-10 2021-12-08 キヤノン株式会社 同期信号出力装置、制御方法、及び、プログラム

Also Published As

Publication number Publication date
BE719976A (US07534539-20090519-C00439.png) 1969-02-03
DE1791092A1 (de) 1971-10-28
DE1791092B2 (de) 1975-05-28
US3588899A (en) 1971-06-28
FR1557670A (US07534539-20090519-C00439.png) 1969-02-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee