FR2496274A1 - 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 - Google Patents
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 Download PDFInfo
- Publication number
- FR2496274A1 FR2496274A1 FR8026438A FR8026438A FR2496274A1 FR 2496274 A1 FR2496274 A1 FR 2496274A1 FR 8026438 A FR8026438 A FR 8026438A FR 8026438 A FR8026438 A FR 8026438A FR 2496274 A1 FR2496274 A1 FR 2496274A1
- Authority
- FR
- France
- Prior art keywords
- signal
- frequency
- duration
- phase
- value
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 title claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 36
- 230000010363 phase shift Effects 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000010453 quartz Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000004020 conductor Substances 0.000 description 7
- 230000006870 function Effects 0.000 description 7
- 230000000630 rising effect Effects 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 5
- 229920005994 diacetyl cellulose Polymers 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
-
- 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
- G01S13/343—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 using sawtooth modulation
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar Systems Or Details Thereof (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8026438A FR2496274A1 (fr) | 1980-12-12 | 1980-12-12 | 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 |
| EP81201364A EP0054335B1 (fr) | 1980-12-12 | 1981-12-11 | Procédé de mesure de distance par radar à onde entretenue modulée en fréquence, appareil pour la mise en oeuvre du procédé et application à la détermination précise du niveau de liquide dans un réservoir |
| DE8181201364T DE3174430D1 (en) | 1980-12-12 | 1981-12-11 | Method of determining distance using fmcw radar, corresponding apparatus and application to the precise determination of the liquid level in containers |
| JP56200808A JPS57124269A (en) | 1980-12-12 | 1981-12-12 | Range measuring method and apparatus |
| US06/330,293 US4503433A (en) | 1980-12-12 | 1981-12-14 | Range measurement by means of frequency modulated continuous wave radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8026438A FR2496274A1 (fr) | 1980-12-12 | 1980-12-12 | 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2496274A1 true FR2496274A1 (fr) | 1982-06-18 |
| FR2496274B1 FR2496274B1 (enExample) | 1984-09-21 |
Family
ID=9249016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8026438A Granted FR2496274A1 (fr) | 1980-12-12 | 1980-12-12 | 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 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4503433A (enExample) |
| EP (1) | EP0054335B1 (enExample) |
| JP (1) | JPS57124269A (enExample) |
| DE (1) | DE3174430D1 (enExample) |
| FR (1) | FR2496274A1 (enExample) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600981A (zh) * | 2019-09-05 | 2019-12-20 | 山东海富光子科技股份有限公司 | 一种低边沿抖动脉冲信号发生器 |
Families Citing this family (47)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4397142A (en) * | 1981-12-07 | 1983-08-09 | Minnesota Mining And Manufacturing Company | Coded threads and sheet material useful for making such coded threads |
| US5012248A (en) * | 1982-12-28 | 1991-04-30 | Lockheed Corporation | Radar absorption material thickness testing device |
| JPS59196483A (ja) * | 1983-04-21 | 1984-11-07 | Kobe Steel Ltd | 電磁波による測距方法 |
| SE441306B (sv) * | 1984-04-25 | 1985-09-23 | Saab Marine Electronics | Sett och anordning for metning av nivan hos ett i en behallare forvarat flytande material |
| FR2566921B1 (fr) * | 1984-06-29 | 1987-12-18 | Thomson Csf | Radioaltimetre a modulation de frequence |
| DE3830992A1 (de) * | 1988-09-12 | 1990-03-22 | Messerschmitt Boelkow Blohm | Radarhoehenmesser |
| DE3924860C2 (de) * | 1989-07-27 | 2000-07-20 | Daimlerchrysler Aerospace Ag | Anordnung zur Erzeugung eines analogen Steuersignals für einen Mikrowellenoszillator |
| GB2246042A (en) * | 1990-07-11 | 1992-01-15 | Philips Electronic Associated | Fmcw radar linearizer. |
| JPH05505470A (ja) * | 1991-02-12 | 1993-08-12 | クローネ メステヒニーク ゲゼルシヤフト ミツト ベシユレンクテル ハフツング ウント コンパニー コマンデイートゲゼルシヤフト | 工業用タンク等の充てんレベル測定装置のための電気回路 |
| GB9103945D0 (en) * | 1991-02-26 | 1991-06-12 | Philips Electronic Associated | Linearizing a swept-frequency radar |
| US5268692A (en) * | 1991-03-14 | 1993-12-07 | Grosch Theodore O | Safe stopping distance detector, antenna and method |
| GB2372649B (en) * | 1992-06-05 | 2002-12-31 | Thomson Csf | "A linearising device for a frequency-modulation ramp and its application to a radio altimeter" |
| FR2754604B1 (fr) * | 1992-06-05 | 1999-04-09 | Thomson Csf | Dispositif de linearisation d'une rampe de modulation de frequence et son application a un radio-altimetre |
| US5387917A (en) * | 1992-12-11 | 1995-02-07 | Honeywell Inc. | Radar fuze |
| US5384541A (en) * | 1993-03-05 | 1995-01-24 | Hewlett-Packard Company | Precision timed delay measurement using phaselocked CW technique |
| DE4345242A1 (de) * | 1993-09-15 | 1995-04-06 | Endress Hauser Gmbh Co | Frequenzumsetzungsschaltung für ein Radar-Abstandsmeßgerät |
| DE19531540C2 (de) * | 1995-08-25 | 1999-05-27 | Krohne Messtechnik Kg | Verfahren zur Messung des Füllstandes einer Flüssigkeit |
| DE19748608A1 (de) * | 1997-11-04 | 1999-05-06 | Daimler Benz Aerospace Ag | Sampling-PLL für hochauflösende Radarsysteme |
| JP3946852B2 (ja) * | 1998-02-20 | 2007-07-18 | 三菱電機株式会社 | レーダ装置およびこのレーダ装置における目標相対距離・相対速度探索方法 |
| EP0955528B1 (de) * | 1998-05-06 | 2006-11-08 | Endress + Hauser GmbH + Co. KG | Verfahren zur Messung des Füllstands eines Füllguts in einem Behälter nach dem Radarprinzip |
| RU2158937C2 (ru) * | 1998-12-29 | 2000-11-10 | Кошуринов Евгений Иванович | Способ и устройство для измерения расстояния |
| RU2151408C1 (ru) * | 1999-06-30 | 2000-06-20 | ООО предприятие "КОНТАКТ-1" | Радиолокационный дальномер |
| SE9903855L (sv) * | 1999-10-21 | 2000-09-18 | Saab Marine Electronics | Anordning vid nivåmätning i tankar |
| RU2189055C2 (ru) * | 2000-01-20 | 2002-09-10 | Кошуринов Евгений Иванович | Приемно-передающее устройство гомодинного радиолокатора |
| WO2002041026A2 (en) * | 2000-11-16 | 2002-05-23 | Krislamov, Gennady Alekseevich | Distance measuring method and device |
| RU2218582C2 (ru) * | 2001-04-02 | 2003-12-10 | Кошуринов Евгений Иванович | Устройство для измерения расстояния |
| EP1488234A4 (en) * | 2002-03-05 | 2006-05-24 | Vitra Bioscience Inc | TRANSFECTION OF MULTIPLEXED CELLS USING CODED MEDIA |
| US7725151B2 (en) * | 2003-06-02 | 2010-05-25 | Van Der Weide Daniel Warren | Apparatus and method for near-field imaging of tissue |
| RU2251708C1 (ru) * | 2003-09-10 | 2005-05-10 | 5 Центральный научно-исследовательский испытательный институт Министерства обороны Российской Федерации (5 ЦНИИИ МО РФ) | Нелинейный радар для обнаружения исполнительных радиоэлектронных устройств управления взрывом |
| DE10344259A1 (de) * | 2003-09-23 | 2005-05-12 | Endress & Hauser Gmbh & Co Kg | Anordnung zur Füllstandmessung in einem mit einem Peilrohr ausgestatteten Tank |
| US7453393B2 (en) * | 2005-01-18 | 2008-11-18 | Siemens Milltronics Process Instruments Inc. | Coupler with waveguide transition for an antenna in a radar-based level measurement system |
| US20070090992A1 (en) * | 2005-10-21 | 2007-04-26 | Olov Edvardsson | Radar level gauge system and transmission line probe for use in such a system |
| US7295151B2 (en) * | 2005-12-19 | 2007-11-13 | Honeywell International Inc. | Systems and methods for self-test of a radar altimeter |
| DE102006058852B4 (de) * | 2006-12-13 | 2014-01-02 | Vega Grieshaber Kg | Verfahren und Vorrichtung zur Korrektur nichtidealer Zwischenfrequenzsignale bei Abstandsmessgeräten nach dem FMCW-Prinzip |
| US8026843B2 (en) * | 2008-01-31 | 2011-09-27 | Infineon Technologies Ag | Radar methods and systems using ramp sequences |
| DE102009032811A1 (de) * | 2009-07-10 | 2011-02-17 | KROHNE Meßtechnik GmbH & Co. KG | Frequenzsynthesizer für ein Füllstandsmessgerät und Füllstandsmessgerät |
| DE102013222767A1 (de) * | 2013-11-08 | 2015-05-13 | Vega Grieshaber Kg | Beheizte Antenne |
| DE102013114735A1 (de) * | 2013-12-20 | 2015-06-25 | Endress + Hauser Gmbh + Co. Kg | PRF-Frequenzgenerator für ein Füllstandsmessgerät |
| DE102015102002A1 (de) * | 2015-02-12 | 2016-08-18 | Endress + Hauser Gmbh + Co. Kg | Vorrichtung zur Ermittlung und Überwachung eines Füllstands |
| DE102016204005A1 (de) * | 2016-03-11 | 2017-09-14 | Robert Bosch Gmbh | Vorrichtung zum Betreiben eines Radarsensors |
| US10346950B2 (en) * | 2016-10-05 | 2019-07-09 | Hidden Path Entertainment, Inc. | System and method of capturing and rendering a stereoscopic panorama using a depth buffer |
| EP3343774B1 (en) * | 2016-12-30 | 2020-07-22 | Nxp B.V. | Digitally controlled oscillator |
| EP3418698B1 (de) * | 2017-06-21 | 2024-03-06 | VEGA Grieshaber KG | Füllstandreflektometer mit referenzreflexion |
| EP3418699B1 (de) * | 2017-06-21 | 2022-08-24 | VEGA Grieshaber KG | Füllstandradargerät mit gesteuerter sendeleistung |
| EP3418700A1 (de) * | 2017-06-21 | 2018-12-26 | VEGA Grieshaber KG | Füllstandradargerät mit automatisierter frequenzanpassung |
| RU2670367C1 (ru) * | 2017-11-03 | 2018-10-22 | Федеральное государственное бюджетное учреждение науки Институт проблем управления им. В.А. Трапезникова Российской академии наук | Устройство для определения количества бурового раствора в емкости |
| US12106506B2 (en) | 2019-04-04 | 2024-10-01 | Battelle Memorial Institute | Imaging systems and related methods including radar imaging with moving arrays or moving targets |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2438116A1 (de) * | 1974-08-08 | 1976-02-19 | Philips Patentverwaltung | Mikrowellen-entfernungsmessgeraet |
| FR2425764A1 (fr) * | 1978-05-11 | 1979-12-07 | Trt Telecom Radio Electr | Dispositif pour engendrer un signal module en frequence et appareil radioaltimetrique comportant un tel dispositif |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1557670A (enExample) * | 1967-09-11 | 1969-02-21 | ||
| US4044355A (en) * | 1973-11-20 | 1977-08-23 | Saab-Scania Aktiebolag | Measurement of contents of tanks etc. with microwave radiations |
| DE2748124C2 (de) * | 1977-10-27 | 1983-01-13 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Anordnung zur Entfernungsmessung nach dem FM-CW-Radarprinzip |
| FR2445535A1 (fr) * | 1978-12-26 | 1980-07-25 | Trt Telecom Radio Electr | Appareil de mesure de distance a emission continue modulee en frequence avec une linearite amelioree |
| FR2461263A1 (fr) * | 1979-07-13 | 1981-01-30 | Trt Telecom Radio Electr | Amelioration du calibrage dans un radioaltimetre |
| US4359902A (en) * | 1980-07-31 | 1982-11-23 | Lawless James C | Liquid level gauge |
-
1980
- 1980-12-12 FR FR8026438A patent/FR2496274A1/fr active Granted
-
1981
- 1981-12-11 EP EP81201364A patent/EP0054335B1/fr not_active Expired
- 1981-12-11 DE DE8181201364T patent/DE3174430D1/de not_active Expired
- 1981-12-12 JP JP56200808A patent/JPS57124269A/ja active Pending
- 1981-12-14 US US06/330,293 patent/US4503433A/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2438116A1 (de) * | 1974-08-08 | 1976-02-19 | Philips Patentverwaltung | Mikrowellen-entfernungsmessgeraet |
| FR2425764A1 (fr) * | 1978-05-11 | 1979-12-07 | Trt Telecom Radio Electr | Dispositif pour engendrer un signal module en frequence et appareil radioaltimetrique comportant un tel dispositif |
Non-Patent Citations (1)
| Title |
|---|
| EXBK/75 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600981A (zh) * | 2019-09-05 | 2019-12-20 | 山东海富光子科技股份有限公司 | 一种低边沿抖动脉冲信号发生器 |
| CN110600981B (zh) * | 2019-09-05 | 2024-03-22 | 山东海富光子科技股份有限公司 | 一种低边沿抖动脉冲信号发生器 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3174430D1 (en) | 1986-05-22 |
| US4503433A (en) | 1985-03-05 |
| FR2496274B1 (enExample) | 1984-09-21 |
| EP0054335A1 (fr) | 1982-06-23 |
| JPS57124269A (en) | 1982-08-03 |
| EP0054335B1 (fr) | 1986-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FR2496274A1 (fr) | 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 | |
| US11768285B2 (en) | Systems and methods for chirp linearization using external reflector(s) as a reference reflector | |
| JP6844119B2 (ja) | 光周波数掃引レーザ光源、及びレーザレーダ | |
| US8488639B1 (en) | Systems and methods having a frequency comb | |
| US11112502B2 (en) | Laser radar system | |
| US20190257641A1 (en) | Light optical angle modulation measurement apparatus and measurement method | |
| JP3583906B2 (ja) | 光学式距離計 | |
| JP7326730B2 (ja) | 距離速度測定装置 | |
| FR2599856A1 (fr) | Systeme d'emission reception pour radar doppler a frequence agile | |
| US20190018138A1 (en) | Frequency modulation for interference free optical time of flight system | |
| CN115220054A (zh) | 基于微型加热器调节重复频率的双光梳测距系统和方法 | |
| US20220365213A1 (en) | Linearization of chirp in coherent lidar systems | |
| US20040051926A1 (en) | Photoelectronic mixing device (pmd) system | |
| US12436245B2 (en) | Linearization of chirp in coherent lidar systems | |
| JP6961185B1 (ja) | 光コム発生器制御装置 | |
| WO2016169007A1 (zh) | 一种波长锁定器、波长锁定方法和装置 | |
| Shimizu et al. | Observation of Subnatural Linewidth in Na D 2 Lines | |
| EP0793153B1 (fr) | Dispositif de mesure précise de la durée d'un intervalle de temps et dispositif de télémétrie laser le comprenant | |
| US12078723B2 (en) | Systems and methods for chirp linearization using a partial reflector as a reference reflector | |
| FR2714552A1 (fr) | Synthétiseur de fréquences à boucle unique et ensemble électronique comportant un tel synthétiseur. | |
| US12306351B2 (en) | Systems and methods for chirp linearization using partial field-of-view (FOV) as a reference reflector | |
| FR2522827A1 (fr) | Emetteur-recepteur fonctionnant dans la bande de 94 ghz, notamment pour radar doppler | |
| FR2564596A1 (fr) | Systeme de verrouillage pour resonateurs d'etalonnage de frequence | |
| Xu et al. | A digital optical phase-locked loop based on field programmable gate array and its applications | |
| JP4831810B2 (ja) | 定在波レーダおよび距離測定方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |