EP0291041B1 - Buoy acting as a bidirectional relay between an underwater ultrasonic signal emitter-receiver capsule and a land base - Google Patents
Buoy acting as a bidirectional relay between an underwater ultrasonic signal emitter-receiver capsule and a land base Download PDFInfo
- Publication number
- EP0291041B1 EP0291041B1 EP19880107602 EP88107602A EP0291041B1 EP 0291041 B1 EP0291041 B1 EP 0291041B1 EP 19880107602 EP19880107602 EP 19880107602 EP 88107602 A EP88107602 A EP 88107602A EP 0291041 B1 EP0291041 B1 EP 0291041B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- buoy
- capsule
- signals
- land base
- submarine
- 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 - Lifetime
Links
- 239000002775 capsule Substances 0.000 title claims description 30
- 230000002457 bidirectional effect Effects 0.000 title claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 5
- 230000004807 localization Effects 0.000 claims description 3
- 238000002405 diagnostic procedure Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 241001080024 Telles Species 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B22/00—Buoys
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
- G10K11/006—Transducer mounting in underwater equipment, e.g. sonobuoys
Definitions
- the invention relates to a marine buoy serving as a bidirectional relay between an underwater capsule transmitting and receiving ultrasonic signals and a land base, comprising an acoustic transmitter for transmitting commands to the underwater capsule, hydrophones for receiving acoustic signals from the capsule, amplification and coding means delivering in response to these signals digital signals, a radio transmission / reception system and electrical supply means.
- Document FR-A-1.415.710 discloses a buoy which itself comprises all the measurement sensors or which is linked by a cable to an underwater capsule comprising the sensors. It is capable of transmitting the information collected and coded to a land station by radio.
- document US-A-4,070,671 describes a submarine navigation system. Different underwater buoys or capsules emit to and receive ultrasonic navigation signals from the surface.
- the object of the invention is therefore to propose a marine buoy which serves as a relay between an underwater source of ultrasonic signals and a terrestrial center, and which can remain operational without maintenance for years.
- This buoy must therefore be capable of transmitting - in real time - the measurement results from the underwater capsule to a terrestrial evaluation center which may possibly be more than 5000 km away.
- Fig. 1 shows a communication diagram between a buoy according to the invention and a land base and between the buoy and an underwater capsule.
- Fig. 2 schematically shows a buoy according to the invention.
- Fig. 3 shows a diagram of the instrumentation equipment of said buoy.
- This capsule includes an emitter / receiver of ultrasonic signals which communicates with similar organs on a buoy 3, namely ultrasonic transmitters 4 and ultrasonic hydrophones 5.
- the buoy floats on the surface of the sea and is anchored mechanically.
- the buoy is equipped with omnidirectional antennas making it possible to send measurement data to a satellite 6 in the microwave range and to communicate directly with a terrestrial base 7 in the short wave range.
- This buoy comprises a metal tube 8, 5 meters long and 60 centimeters wide, which contains a weight of 1500 kg in its lower part and an apparatus chamber 9 in its upper part.
- This room houses storage batteries and electronics.
- the tube 8 is fixed in a float 10 with a diameter of 2 meters and a height of 2 meters, which is filled with polyurethane foam.
- a pestle 12 4 meters high is erected, which supports yellow warning signs 13, solar panels 14, a radar reflector 15 to warn boats, a light source 16 , an antenna 17 for a passive satellite navigation system, an omnidirectional antenna 18 for transmitting data signals to the satellite 6 and an antenna 19 for direct two-way shortwave communication with the earth base.
- the computer is programmed so that it automatically gathers the data coming from the hydrophone 4 and the sensors 23 and it automatically transmits them to the transmission circuit 21 and the antenna 19.
- the transmission of a sequence of data incorrectly received at ground base 7 through the satellite triggers a diagnostic program.
- control signals are sent by the direct shortwave route to the buoy to repeat the data sequence in question. If the error persists, the diagnostic procedure can be extended by the same communication channel to computer 20 and even to capsule 1.
- the supply means on the buoy include the panels 14 and a storage battery 28 of 12 V / 105 Ah each, which can supply the buoy for more than a month without recharge.
- the solar panels 14 provide 30 W, which is sufficient to regularly recharge the batteries.
- Such a buoy can serve as a relay for years between one or more instrumented capsules placed at the bottom of the deep sea, and a distant land base to provide data concerning long-term phenomena in the deep sea and even phenomena in sediments under -seamen, in case the capsule or a part of it has penetrated into these sediments.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Radio Relay Systems (AREA)
Description
L'invention se réfère à une bouée marine servant de relais bidirectionnel entre une capsule sous-marine émettrice-réceptrice de signaux ultrasonores et une base terrestre, comportant un émetteur acoustique pour transmettre des commandes à la capsule sous-marine, des hydrophones pour recevoir des signaux acoustiques de la capsule, des moyens d'amplification et de codage délivrant en réponse à ces signaux des signaux numériques, un système d'émission/réception radio et des moy ens d'alimentation électrique.The invention relates to a marine buoy serving as a bidirectional relay between an underwater capsule transmitting and receiving ultrasonic signals and a land base, comprising an acoustic transmitter for transmitting commands to the underwater capsule, hydrophones for receiving acoustic signals from the capsule, amplification and coding means delivering in response to these signals digital signals, a radio transmission / reception system and electrical supply means.
Pendant ces dernières années, des navires de recherche ont entrepris des mesures océanographiques pour approfondir les connaissances sur le fond de mer en grande profondeur. A ces fins, des capsules de mesure ont été déposées sur le sol et les données recueillies par la capsule ont été transmises vers le navire soit par un câble soit par un canal de transmission ultrasonore. Les données ainsi acquises sont de valeur limitée, car, d'une part, elles ne donnent qu'une image instantanée, le navire ne pouvant rester en place que pour une période limitée, et d'autre part, les équipements de bord ne permettent souvent qu'une évaluation préliminaire des données acquises, l'évaluation définitive n'ayant lieu qu'après le voyage à l'aide des ordinateurs puissants d'un centre de recherche terrestre.In recent years, research vessels have undertaken oceanographic measurements to deepen knowledge of the deep sea floor. For these purposes, measuring capsules were placed on the ground and the data collected by the capsule were transmitted to the ship either by cable or by an ultrasonic transmission channel. The data thus acquired are of limited value because, on the one hand, they only give an instant image, the ship being able to remain in place only for a limited period, and on the other hand, the on-board equipment does often only a preliminary evaluation of the acquired data, the final evaluation taking place only after the trip using the powerful computers of a terrestrial research center.
On connait par le document FR-A-1.415.710 une bouée qui comporte elle-même tous les capteurs de mesure ou bien qui est liée par un câble à une capsule sousmarine comportant les capteurs. Elle est susceptible d'émettre les informations recueillies et codées vers une station terrestre par voie radio.Document FR-A-1.415.710 discloses a buoy which itself comprises all the measurement sensors or which is linked by a cable to an underwater capsule comprising the sensors. It is capable of transmitting the information collected and coded to a land station by radio.
Le document US-A-3.570.437 décrit une bouée servant en même temps de capsule de mesure. Cette capsule peut descendre à plusieurs reprises en profondeur pour collectionner des données qui sont alors stockées sur bande jusqu'à la prochaine apparition à la surface. La télécommande par une base terrestre est transmise par la même voie radio bidirectionnelle que les données provenant des capteurs. Une mémoire sert à stocker les données jusqu'à la prochaine apparition en surface.Document US-A-3,570,437 describes a buoy serving at the same time as a measuring capsule. This capsule can go down several times in depth to collect data which is then stored on tape until the next appearance on the surface. The remote control by a land base is transmitted by the same two-way radio channel as the data coming from the sensors. A memory is used to store data until the next surface appearance.
Dans le document US-A-3.191.202, on décrit une bouée flottante qui dispose elle-même de capteurs et qui émet les données captées vers un satellite géostationnaire.In document US-A-3,191.202, a floating buoy is described which itself has sensors and which transmits the captured data to a geostationary satellite.
Enfin, le document US-A-4.070.671 décrit un système de navigation sousmarine. Différentes bouées ou capsules sousmarines émettent vers et reçoivent des signaux de navigation ultrasonores de la surface.Finally, document US-A-4,070,671 describes a submarine navigation system. Different underwater buoys or capsules emit to and receive ultrasonic navigation signals from the surface.
L'invention a donc pour but de proposer une bouée marine qui sert de relais entre une source sous-marine de signaux ultrasonores et un centre terrestre, et qui peut rester opérative sans entretien pendant des années. Cette bouée doit donc être susceptible de transmettre - en temps réel - les résultats de mesure de la capsule sous-marine vers un centre terrestre d'évaluation qui peut éventuellement être distant de plus de 5000 km.The object of the invention is therefore to propose a marine buoy which serves as a relay between an underwater source of ultrasonic signals and a terrestrial center, and which can remain operational without maintenance for years. This buoy must therefore be capable of transmitting - in real time - the measurement results from the underwater capsule to a terrestrial evaluation center which may possibly be more than 5000 km away.
Ce but est atteint par une bouée marine telle que spécifiée dans la revendication principale.This object is achieved by a marine buoy as specified in the main claim.
En ce qui concerne des mises en oeuvre préférées, référence est faite aux sous-revendications.With regard to preferred implementations, reference is made to the subclaims.
L'invention sera décrite ci-après plus en détail à l'aide d'un exemple préféré de réalisation et des dessins.The invention will be described below in more detail with the aid of a preferred embodiment and the drawings.
Fig. 1 montre un schéma de communication entre une bouée selon l'invention et une base terrestre et entre la bouée et une capsule sous-marine.Fig. 1 shows a communication diagram between a buoy according to the invention and a land base and between the buoy and an underwater capsule.
Fig. 2 montre schématiquement une bouée selon l'invention.Fig. 2 schematically shows a buoy according to the invention.
Fig. 3 représente un schéma de l'équipement d'instrumentation de ladite bouée.Fig. 3 shows a diagram of the instrumentation equipment of said buoy.
Sur la fig. 1, on voit une capsule 1 instrumentée, qui est placée dans les sédiments 2 au fond de la mer. Alternativement et en fonction de l'objet de la recherche, la capsule peut être déposée au fond de la mer ou flotter dans l'eau à une certaine hauteur.In fig. 1, we see an instrumented capsule 1, which is placed in the sediment 2 at the bottom of the sea. Alternatively and depending on the object of research, the capsule can be placed on the seabed or float in water at a certain height.
Cette capsule comporte un émetteur/récepteur de signaux ultrasonores qui communique avec des organes analogues sur une bouée 3, à savoir des émetteurs ultrasonores 4 et des hydrophones ultrasonores 5. La bouée flotte à la surface de la mer et elle est ancrée mécaniquement. La bouée est munie d'antennes omnidirectionnelles permettant d'envoyer des données de mesure vers un satellite 6 dans la gamme des microondes et de communiquer directement avec une base terrestre 7 dans la gamme des ondes courtes.This capsule includes an emitter / receiver of ultrasonic signals which communicates with similar organs on a
Sur la fig. 2, on voit plus en détail la structure mécanique de la bouée 3 de la fig. 1. Cette bouée comporte un tube métallique 8, long de 5 mètres et large de 60 centimètres, qui contient un poids de 1500 kg dans sa partie inférieure et une chambre d'appareillage 9 dans sa partie supérieure. Cette chambre loge des batteries d'accumulateur et l'életronique. Le tube 8 est fixé dans un flotteur 10 d'un diamètre de 2 mètres et d'une hauteur de 2 mètres, qui est rempli de mousse de polyuréthane. Au-dessus du niveau de l'eau 11, un pilon 12 de 4 mètres de hauteur est érigé, qui supporte des panneaux jaunes d'avertissement 13, des panneaux solaires 14, un réflecteur radar 15 pour avertir les bateaux, une source lumineuse 16, une antenne 17 pour un système passif de navigation par satellite, une antenne omnidirectionnelle 18 pour émettre des signaux de données vers le satellite 6 et une antenne 19 pour la communication bidirectionnelle directe par ondes courtes avec la base terrestre.In fig. 2, we see in more detail the mechanical structure of the
L'instrumentation de la bouée est représentée sur la fig. 3. Elle est regroupée autour d'un ordinateur 20, qui supervise le flux de données vers un certain nombre d'unités périphériques et vice-versa, à savoir
- un circuit d'émission 21 alimentant l'antenne 19 de liaison avec le
satellite 6, - un circuit d'émission/
réception 22 établissant à travers l'antenne 18 la liaison bidirectionnelle en ondes courtes avec la base terrestre 7, - des
capteurs 23 placés directement sur la bouée et mesurant par exemple des valeurs météorologiques ou géochimiques de l'eau, - un
système 24 d'émission ou de réception des signaux de localisation haute fréquence ou hyperfréquence pour la localisation de la bouée et pour sa récupération éventuelle, - une
mémoire 25 telle qu'une enregistreuse à bande magnétique sans fin ou un disque permettant de stocker les signaux les plus récents ou leurs équivalents numériques en provenance de la capsule pendant un certain temps tel que quelques jours ou quelques semaines, - un
générateur 26 de signaux de commande envoyant des signaux par l'émetteur ultrasonore 4 vers la capsule pour lui transmettre des signaux de commande, - des moyens d'amplification et de
codage 27 transmettant les signaux provenant de l'hydrophone 5 vers l'ordinateur 20, - et des moyens d'alimentation composés d'une batterie d'accumulateurs 28 et des panneaux solaires 14 pour sa recharge.
- a
transmission circuit 21 supplying theantenna 19 for connection with thesatellite 6, - a transmission /
reception circuit 22 establishing, through theantenna 18, the bidirectional short-wave link with the earth base 7, -
sensors 23 placed directly on the buoy and measuring for example meteorological or geochemical values of the water, - a
system 24 for transmitting or receiving high frequency or microwave location signals for locating the buoy and for its possible recovery, - a
memory 25 such as an endless magnetic tape recorder or a disc making it possible to store the most recent signals or their digital equivalents originating from the capsule for a certain time such as a few days or a few weeks, - a
generator 26 of control signals sending signals by theultrasonic transmitter 4 to the capsule to transmit control signals to it, - amplification and coding means 27 transmitting the signals coming from the hydrophone 5 to the computer 20,
- and supply means composed of a
storage battery 28 andsolar panels 14 for recharging it.
L'ordinateur est programmé de telle sorte qu'il rassemble automatiquement les données provenant de l'hydrophone 4 et des capteurs 23 et il les émet automatiquement vers le circuit d'émission 21 et l'antenne 19. La transmission d'une séquence de données incorrectement reçue à la base terrestre 7 à travers le satellite déclenche un programme de diagnostique. Selon ce programme, des signaux de commande sont émis par la voie directe en ondes courtes vers la bouée pour répéter la séquence de données en question. Si l'erreur persiste, on peut élargir par la même voie de communication la procédure de diagnostique à l'ordinateur 20 et même à la capsule 1.The computer is programmed so that it automatically gathers the data coming from the
En utilisant cette voie de communication, il est également possible d'interroger des capteurs 23 ou via l'émetteur 4 la capsule pour obtenir des informations supplémentaires ou pour changer le fonctionnement des capteurs.By using this communication channel, it is also possible to interrogate
Les moyens d'alimentation sur la bouée comportent les panneaux 14 et une batterie d'accumulateur 28 de 12 V/105 Ah chacune, qui peuvent alimenter la bouée pendant plus d'un mois sans recharge. Les panneaux solaires 14 fournissent 30 W, ce qui suffit pour recharger régulièrement les accumulateurs.The supply means on the buoy include the
Une telle bouée peut servir de relais pendant des années entre une ou plusieurs capsules instrumentées placées au fond de la mer profonde, et une base terrestre éloignée pour fournir des données concernant les phénomènes long-terme en mer profonde et même des phénomènes dans des sédiments sous-marins, au cas où la capsule ou une partie de celle-ci ait pénétrée dans ces sédiments.Such a buoy can serve as a relay for years between one or more instrumented capsules placed at the bottom of the deep sea, and a distant land base to provide data concerning long-term phenomena in the deep sea and even phenomena in sediments under -seamen, in case the capsule or a part of it has penetrated into these sediments.
Claims (3)
- A sea buoy (3) serving as a relay between a land base (7) and a signal emitting submarine capsule (1), comprising means for receiving signals from the capsule and to encode them, radio transmitter means (21) for transmitting the signals to the land base (7), power supply means, which contain accumulators (28) which can be recharged by solar panels (14), characterized in that the buoy further comprises- an ultrasonic transmitter (5) for transmitting orders to the submarine capsule,- hydrophones (5) for receiving ultrasonic signals from the capsule,- amplifying and encoding means (27), which produce digital signals from these signals,- a memory (25) which can memorize the most recent signals or their digital equivalents during at least several weeks under control of a computer (20),- a high frequency transmitter/receiver (22) for a bidirectional direct connection between the land base (7) and the buoy (3), which makes it possible to initiate from the land base the repeated transmission of erroneous data or to start a diagnostic procedure at the level of the buoy, and that the radio transmitter means (21) comprise an omnidirectional antenna (12) for the communication with a geostationary satellite (6).
- A buoy according to claim 1, characterized in that it further comprises a transmitter (4) for ultrasonic signals, which cooperates with a corresponding receiver in the submarine capsule (1) under control of the computer (20), so as to transmit control signals towards the capsule, and that there are also provided hydrophones (5) which serve for receiving ultrasonic signals coming from the submarine capsule.
- A buoy according to one of claims 1 and 2, characterized in that it further comprises a localisation system (24) via satellite.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU86877 | 1987-05-13 | ||
| LU86877A LU86877A1 (en) | 1987-05-13 | 1987-05-13 | MARINE BUOY USING A TWO-WAY RELAY BETWEEN AN UNDERWATER CAPSULE TRANSMITTING AND RECEIVING ULTRASONIC SIGNALS AND A LAND BASE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0291041A1 EP0291041A1 (en) | 1988-11-17 |
| EP0291041B1 true EP0291041B1 (en) | 1993-03-03 |
Family
ID=19730922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19880107602 Expired - Lifetime EP0291041B1 (en) | 1987-05-13 | 1988-05-11 | Buoy acting as a bidirectional relay between an underwater ultrasonic signal emitter-receiver capsule and a land base |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0291041B1 (en) |
| DE (1) | DE3878728T2 (en) |
| DK (1) | DK248088A (en) |
| ES (1) | ES2039501T3 (en) |
| LU (1) | LU86877A1 (en) |
| PT (1) | PT87468B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010053614A1 (en) | 2010-12-07 | 2012-06-14 | L-3 Communications Elac Nautic Gmbh | transfer device |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4973970A (en) * | 1989-07-14 | 1990-11-27 | General Atomics | Integrated automated system for waste site characterization |
| FR2674338B1 (en) * | 1991-03-19 | 1993-12-17 | Orca Instrumentation Sarl | INSTRUMENTATED FISH CONCENTRATOR MARITIME DEVICE, FISHING SYSTEM COMPRISING SUCH DEVICES, AND RECEIVING STATION OF SUCH A SYSTEM. |
| ES2239493B1 (en) * | 2003-01-23 | 2006-11-16 | Fundacion Internacional Para La Proteccion Y Difusion Del Arte | CONTROL AND SURVEILLANCE SYSTEM OF UNDERWATER ARCHAEOLOGICAL REMAINS AND WATER QUALITY. |
| US7509841B2 (en) * | 2006-07-14 | 2009-03-31 | Veyance Technologies, Inc. | Flexible leak detection system and method for double carcass hose |
| US7387012B2 (en) | 2006-07-14 | 2008-06-17 | Veyance Technologies, Inc. | Leak detection sensor system and method for double carcass hose |
| RU2492508C1 (en) * | 2012-03-14 | 2013-09-10 | Федеральное государственное военное образовательное учреждение высшего профессионального образования Военная академия Ракетных войск стратегического назначения имени Петра Великого МО РФ | Hydroacoustic detection device |
| ES2504015B1 (en) * | 2014-06-04 | 2015-07-07 | Luis Felipe MAZO SANFELIZ | Floating device and communications system for aquatic areas based on floating devices |
| CN111204411B (en) * | 2020-01-18 | 2021-11-16 | 米脂县宇宝北斗农业发展有限公司 | Self-stabilizing satellite signal amplification buoy |
| CN114255657A (en) * | 2021-12-07 | 2022-03-29 | 国网福建省电力有限公司宁德供电公司 | Energy-saving submarine cable protection warning lamp |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3191202A (en) * | 1963-07-31 | 1965-06-29 | Eugene H Handler | Minimum motion moored buoy system |
| FR1415710A (en) * | 1964-09-12 | 1965-10-29 | Centre Nat Rech Scient | Oceanographic exploration device |
| US3570437A (en) * | 1969-02-11 | 1971-03-16 | Texas Instruments Inc | Multi-cycle ocean data gathering system |
| US3674225A (en) * | 1970-07-09 | 1972-07-04 | Us Army | Buoy |
| US4070671A (en) * | 1975-09-18 | 1978-01-24 | Rockwell International Corporation | Navigation reference system |
| US4622557A (en) * | 1984-10-31 | 1986-11-11 | The United States Of America As Represented By The Secretary Of The Air Force | Transdigitizer for relaying signals from global positioning system (GPS) satellites |
-
1987
- 1987-05-13 LU LU86877A patent/LU86877A1/en unknown
-
1988
- 1988-05-06 DK DK248088A patent/DK248088A/en not_active Application Discontinuation
- 1988-05-11 DE DE19883878728 patent/DE3878728T2/en not_active Expired - Fee Related
- 1988-05-11 EP EP19880107602 patent/EP0291041B1/en not_active Expired - Lifetime
- 1988-05-11 ES ES88107602T patent/ES2039501T3/en not_active Expired - Lifetime
- 1988-05-12 PT PT8746888A patent/PT87468B/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010053614A1 (en) | 2010-12-07 | 2012-06-14 | L-3 Communications Elac Nautic Gmbh | transfer device |
| WO2012079559A2 (en) | 2010-12-07 | 2012-06-21 | L-3 Communications Elac Nautik Gmbh | Transmitting device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3878728D1 (en) | 1993-04-08 |
| PT87468A (en) | 1989-05-31 |
| DE3878728T2 (en) | 1993-06-09 |
| PT87468B (en) | 1993-09-30 |
| LU86877A1 (en) | 1988-06-13 |
| DK248088A (en) | 1988-11-14 |
| EP0291041A1 (en) | 1988-11-17 |
| ES2039501T3 (en) | 1993-10-01 |
| DK248088D0 (en) | 1988-05-06 |
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