CA1330587C - Portable underwater sonar monitor - Google Patents
Portable underwater sonar monitorInfo
- Publication number
- CA1330587C CA1330587C CA000602115A CA602115A CA1330587C CA 1330587 C CA1330587 C CA 1330587C CA 000602115 A CA000602115 A CA 000602115A CA 602115 A CA602115 A CA 602115A CA 1330587 C CA1330587 C CA 1330587C
- Authority
- CA
- Canada
- Prior art keywords
- housing
- monitor
- whereat
- display unit
- front surface
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
- B63C11/02—Divers' equipment
-
- 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
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/521—Constructional features
-
- 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
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/64—Luminous indications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/08—Waterproof bodies or housings
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/51—Housings
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Water Treatment By Sorption (AREA)
Abstract
Abstract A portable underwater sonar monitor for divers comprises a two-part housing including a transducer unit and a control and display unit. Both units can also be used separately and then are connected by means of a cable. The transducer unit comprises electroacoustic transducers for transmitting and receiving sound waves and for scanning an angular area in front of the monitor. The control and display unit includes an electroluminescent display on which the viewing area in front of the monitor is displayed in a profile representa-tion. Various additional indicators such as for direction, distance, diving depth, battery condition, frequency etc. are provided on the display.
Description
~ --/
13 3 0 5 8 7 741~0648 US/CA
Portable Underwater Sonar Monitor The invention relates to sonar equipment and in particular to a portable underwater sonar monitor.
Background of the Invention It is known to use a television camera for making underwater pictures and for underwater monitoring. Such cameras normally have a small cathode ray tube for showing the scene as scanned by the camera. Such TV cameras however require a bright illumination of the scene so that lt is almost lmpossible to use such cameras in muddy water and in cases where additional illumination is not permitted. Furthermore -;~
sonar systems are known which scan the scene with sound pulses and display the echo signals either on a str$p of paper or on a CRT monitor. The sonar apparatus includes electroacoustic transducers for generating and transmission of sound waves and for receiving the echos as reflected by the target. These acoustic signals are converted by the transducer into electrical signals and after further signal processing are displayed or recorded by appropriate equipment. The electroacoustic transducers in those cases are positioned either in the hull of the ship or in a particular transducer gear slidably mounted to the bottom of the ship.
~ .~
~i 13~87 ;; 2 69660-17 SUMMARY OF THE INVENTION
~, It is the main object of the invention to provide a portable underwater monitor for divers which monitor can as easily be handled like a television camera but does not require additional illumlnation and can also be used in muddy water.
Accordlng to the invention a portable underwater sonar monitoring apparatus comprislng: a) a fluld tlght housing of essentially cylindrical or parallelepiped shape; b) at least one handle rigidly connected to said housing for holding and aiming said housing with operating elements for manually controlling the monitor apparatus being provided at said handle or in its immediate viclnity; c) electroacoustics transmitting/receiving transducers provided at a first front surface of said housing;
d) an electrooptical display unit in the form of an electroluminescence screen provlded at the opposite front surface of said housing for dlsplaying the scene in front of said apparatus as scanned by said transducers as a pseudo 3-dimensional profile representation of said scene; and e) said screen including further indicating surfaces for the diving depth and the orientation of the monitor as well as for the mode of operation, the frequency of the sound waves, and the measuring range.
Further details of the invention are described in the dependent claims. The invention discloses a sonar monitor which scans the scene by means of sound waves and the image generated by such scanning i5 presented optlcally on a display provided in the same housing. Further objects advantages and details of the invention will become .,i.,~, ~ . ~
~, 1330~87 3 ~ ~
apparent when reading the following description of a ~;
¦ preferred embodiment. ; ~
: . ':
Brief Description of the Drawings Figure 1 shows the portable sonar monitor in a perspective view;
Figure 2 shows a section along the longitudinal axis of the apparatus;
Figure 3 shows the front surface carrying the display and Figure 4 shows the electrooptical display unit indicating various details of the scene scanned by the transducers.
The housing essentially is of cylindrical shape and consists of two portions namely a control and display unit 1 and a transducer unit 2. On the front surface 3 of transducer unit 2 which is opposite the control and display unit 1 a transmitting transducer 4, a group of receiving transducers 5 and a further transducer 6 for listening to the echoes are ; , provided. Behind the transducers an electronics compartment 7 is provided including the driver stages for the transmitting transducer and the signal processing electronics for the -. ' .
'.:
~ 1330587 receiving transducers. The receiving transducer consists o~ a plurality of individual transducer elements such that a bundled reception characteristic is generated which is scanned across the field of view of the monitor.
The control and display unit 1 includes an electrolumines- ;~
cence display screen 9 at its front surface 8 which is opposite of the transducers. Display 9 can be viewed from the outside through a window 10 which is made of PMMA (Polymethyl-metacrylat) and provides a fluid tight and pressure tight cover. The window 10 is provided with an antireflex coating.
In the control and display unit 1 there are also provided several printed circuit boards 34 for generating the operating voltage for the display and for signal processing and slgnal evaluation of the electrlcal signals delivered by the transducer unit. For indicating the spatial orientation of the monitor a compa~s 11 and for measuring the diving depth a pressure sensor 12 are located in the control and display unit 1. A cable connector 13 covered by a fluid tight cap may be used for connecting a test apparatus for testing the monitor. By means of an earphone connector 14 an earphone 15 may be connected to the monitor with the earphone 15 e.g.
being located in the helmet of the diver. By means of the earphone 15 and the listening transducer 6 any sources of nolse can be monitored in the space around the apparatus.
Both parts 1 and 2 of the housing each form a pressure tight and fluid tight unit and can be used separately if required -and in this case will be connected to each other by means of a cable.
,~" ,~
~` 1330587 ~-A bow shaped handle 16 is rigidly connected to the housing 17 of the control and display unit 1. This handle 16 serves for holding and aiming the monitor. Operating elements 18 e.g.
pressure tight switches are associated with the handle on both sides of the unit 1. A power supply unit 19 co~prising several batteries or rechargeable batteries can be removed and replaced without opening the housing 17. The outer shape of the power supply unit fits into the outer shape of the entire housing 17, 20 of both units 1 and 2. Housing 20 of the transducer unit 2 is shaped by means of portion 21 such that it together with battery compartment 19 forms a stream-lined shape of the entire housing 17, 20. In order to balance the monitor in the water bouyancy means might be provided within the housing or its ~acket 21. Such means also could be addltionally fastened to the housing. The control elements 18 can elther be provlded at the handle 16 or at the housing 17 in the immediate vacinity of the handle 16. The electro-lumine-~cence display 9 ls inclined by about 60 degrees with respect to the longltudlnal axls 22 of the houslng so that the diver can readily look onto the dlsplay of the monitor whlch floats ln front of hlm. Both houslngs 17 and 20 may comprise of fiberenforced plastlc material into which metal lnserts are lntegrated for fastenlng the indivldual components and the control elements.
Dlvldlng the houslng lnto a transducer unit 2 and a control and dlsplay unit 1 makes it possible to fix the transducer unlt 2 to a separate carrier, e.g. a bouy or a frame or linkage and to provide the control and display unit 1 on j. ,~ - ~, - ~ , .~. .. . . . .
--` ~330~87 board of a ship. In this case both units are connected to each other by means of a multiwire cable. For this purpose both units 1 and 2 are electrically connected to each other by means of a connector unit 23 so that for using both units separately the cable has to be inserted between the two parts of the connector unit.
Figure 4 shows a view on display 10. In a profiled type display it shows the viewing area ahead of the monitor and includes additional markings 24 for the angular displacement and further has distance marks 25. Guided by those marks the viewing area is shown like a profile so that e.g. a wreck 26 is shown in its spatial representation. A compass dial 27 together with a pointer 28 can be read at the display 10 which also has a battery exhaust indicator 29. In a particular field 30 the diving depth is indicated. A control fleld 32 positioned below the profile representation 31 of the viewing area indicates several characteristic data or parameters of the presently selected mode of operation, e.g.
the distance range, the amplification factor and the lower ~ ~
limit of the received signals from which on the signals are ~ -indicated. Signals having a lower amplitude, as e.g. signals from fishes or plankton, are suppressed to avoid interference with the display representation. Finally an indicator shows whether or not the listening channel and listening transducer is operating. Furthermore the frequency of the scanning signals is indicated. In the case as shown this frequency is 25 kHz. The depth is 12m, the listening channel is switched-off (AUS). The monitor works in mode 1. These modes may '.., :~
;,~ . ~ .: . : , . : ~
. ~.:. ~, : :~ . , . -. .
-~~ 7 1330~87 distinguish between scanning and tracking mode, narrow beam and wide beam scanning etc. The distance range is lOOm. The amplifying factor is 6 and the minimum level is 3. In the -embodiment shown in figure 4 the angular marks 24 are provided in relation to north-south direction. They also could be given in relation to the longitudinal axis 22 of the monltor apparatus. Reference to the north-south direction in accordance with the compass dial 27 is particular useful in the case when transducer unit 2 and control and display unit 1 are used separately. A electroluminescence display i5 of particular advantage in view of its flat shape and the low supply voltage required for thls type of display. A carrying ~
handle 23 is provided at the housing 17 of the control and ; ;
di~play unit 1 just above the compartment for the printed clrcuit boards 34.
. ~ .
. .
i "~
...s.
13 3 0 5 8 7 741~0648 US/CA
Portable Underwater Sonar Monitor The invention relates to sonar equipment and in particular to a portable underwater sonar monitor.
Background of the Invention It is known to use a television camera for making underwater pictures and for underwater monitoring. Such cameras normally have a small cathode ray tube for showing the scene as scanned by the camera. Such TV cameras however require a bright illumination of the scene so that lt is almost lmpossible to use such cameras in muddy water and in cases where additional illumination is not permitted. Furthermore -;~
sonar systems are known which scan the scene with sound pulses and display the echo signals either on a str$p of paper or on a CRT monitor. The sonar apparatus includes electroacoustic transducers for generating and transmission of sound waves and for receiving the echos as reflected by the target. These acoustic signals are converted by the transducer into electrical signals and after further signal processing are displayed or recorded by appropriate equipment. The electroacoustic transducers in those cases are positioned either in the hull of the ship or in a particular transducer gear slidably mounted to the bottom of the ship.
~ .~
~i 13~87 ;; 2 69660-17 SUMMARY OF THE INVENTION
~, It is the main object of the invention to provide a portable underwater monitor for divers which monitor can as easily be handled like a television camera but does not require additional illumlnation and can also be used in muddy water.
Accordlng to the invention a portable underwater sonar monitoring apparatus comprislng: a) a fluld tlght housing of essentially cylindrical or parallelepiped shape; b) at least one handle rigidly connected to said housing for holding and aiming said housing with operating elements for manually controlling the monitor apparatus being provided at said handle or in its immediate viclnity; c) electroacoustics transmitting/receiving transducers provided at a first front surface of said housing;
d) an electrooptical display unit in the form of an electroluminescence screen provlded at the opposite front surface of said housing for dlsplaying the scene in front of said apparatus as scanned by said transducers as a pseudo 3-dimensional profile representation of said scene; and e) said screen including further indicating surfaces for the diving depth and the orientation of the monitor as well as for the mode of operation, the frequency of the sound waves, and the measuring range.
Further details of the invention are described in the dependent claims. The invention discloses a sonar monitor which scans the scene by means of sound waves and the image generated by such scanning i5 presented optlcally on a display provided in the same housing. Further objects advantages and details of the invention will become .,i.,~, ~ . ~
~, 1330~87 3 ~ ~
apparent when reading the following description of a ~;
¦ preferred embodiment. ; ~
: . ':
Brief Description of the Drawings Figure 1 shows the portable sonar monitor in a perspective view;
Figure 2 shows a section along the longitudinal axis of the apparatus;
Figure 3 shows the front surface carrying the display and Figure 4 shows the electrooptical display unit indicating various details of the scene scanned by the transducers.
The housing essentially is of cylindrical shape and consists of two portions namely a control and display unit 1 and a transducer unit 2. On the front surface 3 of transducer unit 2 which is opposite the control and display unit 1 a transmitting transducer 4, a group of receiving transducers 5 and a further transducer 6 for listening to the echoes are ; , provided. Behind the transducers an electronics compartment 7 is provided including the driver stages for the transmitting transducer and the signal processing electronics for the -. ' .
'.:
~ 1330587 receiving transducers. The receiving transducer consists o~ a plurality of individual transducer elements such that a bundled reception characteristic is generated which is scanned across the field of view of the monitor.
The control and display unit 1 includes an electrolumines- ;~
cence display screen 9 at its front surface 8 which is opposite of the transducers. Display 9 can be viewed from the outside through a window 10 which is made of PMMA (Polymethyl-metacrylat) and provides a fluid tight and pressure tight cover. The window 10 is provided with an antireflex coating.
In the control and display unit 1 there are also provided several printed circuit boards 34 for generating the operating voltage for the display and for signal processing and slgnal evaluation of the electrlcal signals delivered by the transducer unit. For indicating the spatial orientation of the monitor a compa~s 11 and for measuring the diving depth a pressure sensor 12 are located in the control and display unit 1. A cable connector 13 covered by a fluid tight cap may be used for connecting a test apparatus for testing the monitor. By means of an earphone connector 14 an earphone 15 may be connected to the monitor with the earphone 15 e.g.
being located in the helmet of the diver. By means of the earphone 15 and the listening transducer 6 any sources of nolse can be monitored in the space around the apparatus.
Both parts 1 and 2 of the housing each form a pressure tight and fluid tight unit and can be used separately if required -and in this case will be connected to each other by means of a cable.
,~" ,~
~` 1330587 ~-A bow shaped handle 16 is rigidly connected to the housing 17 of the control and display unit 1. This handle 16 serves for holding and aiming the monitor. Operating elements 18 e.g.
pressure tight switches are associated with the handle on both sides of the unit 1. A power supply unit 19 co~prising several batteries or rechargeable batteries can be removed and replaced without opening the housing 17. The outer shape of the power supply unit fits into the outer shape of the entire housing 17, 20 of both units 1 and 2. Housing 20 of the transducer unit 2 is shaped by means of portion 21 such that it together with battery compartment 19 forms a stream-lined shape of the entire housing 17, 20. In order to balance the monitor in the water bouyancy means might be provided within the housing or its ~acket 21. Such means also could be addltionally fastened to the housing. The control elements 18 can elther be provlded at the handle 16 or at the housing 17 in the immediate vacinity of the handle 16. The electro-lumine-~cence display 9 ls inclined by about 60 degrees with respect to the longltudlnal axls 22 of the houslng so that the diver can readily look onto the dlsplay of the monitor whlch floats ln front of hlm. Both houslngs 17 and 20 may comprise of fiberenforced plastlc material into which metal lnserts are lntegrated for fastenlng the indivldual components and the control elements.
Dlvldlng the houslng lnto a transducer unit 2 and a control and dlsplay unit 1 makes it possible to fix the transducer unlt 2 to a separate carrier, e.g. a bouy or a frame or linkage and to provide the control and display unit 1 on j. ,~ - ~, - ~ , .~. .. . . . .
--` ~330~87 board of a ship. In this case both units are connected to each other by means of a multiwire cable. For this purpose both units 1 and 2 are electrically connected to each other by means of a connector unit 23 so that for using both units separately the cable has to be inserted between the two parts of the connector unit.
Figure 4 shows a view on display 10. In a profiled type display it shows the viewing area ahead of the monitor and includes additional markings 24 for the angular displacement and further has distance marks 25. Guided by those marks the viewing area is shown like a profile so that e.g. a wreck 26 is shown in its spatial representation. A compass dial 27 together with a pointer 28 can be read at the display 10 which also has a battery exhaust indicator 29. In a particular field 30 the diving depth is indicated. A control fleld 32 positioned below the profile representation 31 of the viewing area indicates several characteristic data or parameters of the presently selected mode of operation, e.g.
the distance range, the amplification factor and the lower ~ ~
limit of the received signals from which on the signals are ~ -indicated. Signals having a lower amplitude, as e.g. signals from fishes or plankton, are suppressed to avoid interference with the display representation. Finally an indicator shows whether or not the listening channel and listening transducer is operating. Furthermore the frequency of the scanning signals is indicated. In the case as shown this frequency is 25 kHz. The depth is 12m, the listening channel is switched-off (AUS). The monitor works in mode 1. These modes may '.., :~
;,~ . ~ .: . : , . : ~
. ~.:. ~, : :~ . , . -. .
-~~ 7 1330~87 distinguish between scanning and tracking mode, narrow beam and wide beam scanning etc. The distance range is lOOm. The amplifying factor is 6 and the minimum level is 3. In the -embodiment shown in figure 4 the angular marks 24 are provided in relation to north-south direction. They also could be given in relation to the longitudinal axis 22 of the monltor apparatus. Reference to the north-south direction in accordance with the compass dial 27 is particular useful in the case when transducer unit 2 and control and display unit 1 are used separately. A electroluminescence display i5 of particular advantage in view of its flat shape and the low supply voltage required for thls type of display. A carrying ~
handle 23 is provided at the housing 17 of the control and ; ;
di~play unit 1 just above the compartment for the printed clrcuit boards 34.
. ~ .
. .
i "~
...s.
Claims (10)
1. A portable underwater sonar monitoring apparatus comprising:
a) a fluid tight housing of essentially cylindrical or parallelepiped shape;
b) at least one handle rigidly connected to said housing for holding and aiming said housing with operating elements for manually controlling the monitor apparatus being provided at said handle or in its immediate vicinity;
c) electroacoustics transmitting/receiving transducers provided at a first front surface of said housing;
d) an electrooptical display unit in the form of an electroluminescence screen provided at the opposite front surface of said housing for displaying the scene in front of said apparatus as scanned by said transducers as a pseudo 3-dimensional profile representation of said scene; and e) said screen including further indicating surfaces for the diving depth and the orientation of the monitor as well as for the mode of operation, the frequency of the sound waves, and the measuring range.
a) a fluid tight housing of essentially cylindrical or parallelepiped shape;
b) at least one handle rigidly connected to said housing for holding and aiming said housing with operating elements for manually controlling the monitor apparatus being provided at said handle or in its immediate vicinity;
c) electroacoustics transmitting/receiving transducers provided at a first front surface of said housing;
d) an electrooptical display unit in the form of an electroluminescence screen provided at the opposite front surface of said housing for displaying the scene in front of said apparatus as scanned by said transducers as a pseudo 3-dimensional profile representation of said scene; and e) said screen including further indicating surfaces for the diving depth and the orientation of the monitor as well as for the mode of operation, the frequency of the sound waves, and the measuring range.
2. The apparatus of claim 1 comprising a power supply unit integrated into the outer shape of said housing, which power supply unit is exchangeable without opening the housing.
8a
8a
3. The apparatus of claim 2, whereat each of the two parts of the housing is a fluid tight sub-housing and where both parts can be separately used and during separate use can be connected by a multiwire cable.
4. The apparatus of claim 1 in which the electrooptical display means is an electroluminescence screen which besides its indicating surface for the echo signals in the form of a profile representation comprises further indicating surfaces for the diving depth and the orientation of the monitor as well as for the mode of operation, the frequency of the sound waves, and the measuring range.
5. The apparatus of claim 4, whereat the indicating surface comprises light emitting indicators for the angular position and for the distance ranges.
6. The apparatus of claim 1 or 2, whereat the front surface carrying the display unit is inclined with respect to the longitudinal axis of the housing by an angle deviating from 90 degrees, preferably in the range of 60 degrees.
7. The apparatus of claim 1, whereat a compass is provided within the housing.
8. The apparatus of claim 1, whereat a depth sensor and indicator is provided in the housing.
9. The apparatus of claim 1, whereat a connector for an earphone is provided at the front surface of the housing which carries the display unit.
10. The apparatus of claim 1, whereat the housing is made of a glass fiber enforced plastic material with metal inserts for fastening individual components and their supports to the housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3819586.0 | 1988-06-09 | ||
| DE3819586A DE3819586A1 (en) | 1988-06-09 | 1988-06-09 | UNDERWATER VISIBILITY |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1330587C true CA1330587C (en) | 1994-07-05 |
Family
ID=6356167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000602115A Expired - Lifetime CA1330587C (en) | 1988-06-09 | 1989-06-08 | Portable underwater sonar monitor |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0345718B1 (en) |
| CA (1) | CA1330587C (en) |
| DE (2) | DE3819586A1 (en) |
| NO (1) | NO174826B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100535737C (en) * | 2007-09-28 | 2009-09-02 | 中国水产科学研究院黄海水产研究所 | Portable deep water net cage underwater monitor |
| CN105599882A (en) * | 2015-12-25 | 2016-05-25 | 河北工业大学 | Energy section module of modular micro AUV (Autonomous Underwater Vehicle) |
| GB2557994B (en) * | 2016-12-21 | 2020-01-15 | Subsea 7 Ltd | Supporting saturation divers underwater using a UUV with ancillary electrical equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2906187A (en) * | 1954-01-07 | 1959-09-29 | Dotson Kimes Entpr | Automatic camera control |
| US3820062A (en) * | 1973-01-02 | 1974-06-25 | Trw Inc | Acousto-optical underwater imaging system |
| DE2313267A1 (en) * | 1973-03-06 | 1974-09-26 | Holotron Corp | METHOD AND DEVICE FOR CONVERTING RADIATION BY ROTATING SCANNING |
| US4686532A (en) * | 1985-05-31 | 1987-08-11 | Texas Instruments Incorporated | Accurate location sonar and radar |
-
1988
- 1988-06-09 DE DE3819586A patent/DE3819586A1/en not_active Withdrawn
-
1989
- 1989-06-06 DE DE89110192T patent/DE58906406D1/en not_active Expired - Lifetime
- 1989-06-06 EP EP89110192A patent/EP0345718B1/en not_active Expired - Lifetime
- 1989-06-08 CA CA000602115A patent/CA1330587C/en not_active Expired - Lifetime
- 1989-06-08 NO NO892349A patent/NO174826B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NO174826C (en) | 1994-07-13 |
| EP0345718B1 (en) | 1993-12-15 |
| EP0345718A2 (en) | 1989-12-13 |
| NO892349L (en) | 1989-12-11 |
| DE3819586A1 (en) | 1989-12-14 |
| DE58906406D1 (en) | 1994-01-27 |
| EP0345718A3 (en) | 1990-11-07 |
| NO892349D0 (en) | 1989-06-08 |
| NO174826B (en) | 1994-04-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121205 |