CN109459755A - A kind of multi-functional towed body raft assistance platform dragging operation based on side scan sonar tail - Google Patents
A kind of multi-functional towed body raft assistance platform dragging operation based on side scan sonar tail Download PDFInfo
- Publication number
- CN109459755A CN109459755A CN201811538180.3A CN201811538180A CN109459755A CN 109459755 A CN109459755 A CN 109459755A CN 201811538180 A CN201811538180 A CN 201811538180A CN 109459755 A CN109459755 A CN 109459755A
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- towed body
- tail
- functional
- floating drum
- scan sonar
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- 238000007667 floating Methods 0.000 claims abstract description 49
- 230000001154 acute effect Effects 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 238000013461 design Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 4
- 238000013507 mapping Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000386 athletic effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
- G01S15/8902—Side-looking sonar
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Acoustics & Sound (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
A kind of multi-functional towed body raft assistance platform dragging operation based on side scan sonar tail of the invention, including frame and floating drum, frame includes connecting rod and deckle board, two deckle board parallel interval settings, connecting rod is more and connecting rod two end is respectively erected on two deckle boards, two floating drums are arranged in parallel, and the central axis upright of the central axis of floating drum and connecting rod is arranged, and the angle between the central axis and horizontal plane of floating drum is acute angle.A kind of multi-functional towed body raft assistance platform dragging operation based on side scan sonar tail of the invention, by using the Platform Designing of transverse frame, so that cut down device production simpler quick for towed body, required time is shorter, expense is lower, and the angle design between the central axis and horizontal plane of floating drum is at an acute angle, that is, uses the mounting means of tilt axis, it is slightly lower using front end and rear end is slightly higher.Since there are differences in height before and after buoy-axis, the whole machine balancing performance that towed body is cut down can be effectively adjusted, guarantees that towed body cuts down stationarity in water.
Description
Technical field
The present invention relates to undersea detections and Image-forming instrument instrument field, are based on side scan sonar tail more particularly, to one kind
Drag the multi-functional towed body raft assistance platform of operation.
Background technique
Acoustics surveying and mapping technology is a kind of highly effective means for detecting ocean.Using acoustics surveying and mapping technology, can detect
Seabed type, carry out drive marine phenomenon observation, carry out the detection of subsea strata section, and for submersible provide navigation, keep away
It touches, the information of bottom contour tracking.With the needs that marine resources development in recent years and marine economy develop, country is to seabed
Type detection analysis becomes increasingly to pay attention to, and many R&D institutions and educational institution have purchased side scan sonar mapping system.Often at present
C3D side scan sonar mapping system has the advantages that detection accuracy is high, and distance is remote, high resolution, covering power is strong, advanced
The realization of performance is to the very high requirement that is fixedly connected between underwater transducer and operation ship: underwater transducer must and operation ship
It securely fixes, swing cannot be deflected in ship navigation, and need to remain parallel between energy converter body and ship, energy converter is not
It can be by barrier obstructions such as operation ship ship side etc..
At present between underwater transducer and operation ship there are mainly two types of fixed form: a kind of mode is with one end flange plate
Steel pipe connect with underwater transducer, on steel pipe hawser or iron wire binding on the quarter, the shortcomings that this method, is to operate
Complexity expends the time, is not fixed firmly, and cannot be guaranteed that underwater transducer is vertical with the water surface, pops one's head in when ship navigates by water operation
It is easy to happen deflection, is usually used in the case where not needing to accurately measure；Another way is using special operation ship, ship
Bottom is equipped with fixed device, and energy converter is fixed on boat bottom when use, although the measurement of this method is precisely, is used every time
Diver must be allowed to be lauched installing and dismounting, time-consuming and laborious, low efficiency is at high cost, and due to needing fixed special vessel, can not
Realize the demand carried out the work in any sea area.
Currently, underwater towed vehicle, is using relatively broad, towed body raft waterborne since athletic posture application not easy to control is less, and
Few the case where being equipped with towed body device exclusively for side scan sonar.Thus it is difficult to find that the attitude stabilization quality of data is good, operation letter
List, accurate positioning, operation mode highly-safe, applied widely.
Summary of the invention
The present invention provides a kind of multi-functional towed body raft assistance platform that operation is dragged based on side scan sonar tail, can ensure side
Under the premise of sweeping the advantage that sonar tail drags the operation attitude stabilization quality of data good, easy to operate, traditional tail is overcome to drag operation positioning accurate
The shortcomings that poor, safety is low, narrow application range is spent, meanwhile, which can also carry other and fix or boating type small device,
Such as current meter.
According to an aspect of the present invention, provide it is a kind of based on side scan sonar tail drag operation multi-functional towed body raft assist it is flat
Platform, including frame and floating drum, the frame include connecting rod and deckle board, and two deckle board parallel intervals are arranged, and the connecting rod is
More and the connecting rod two end are respectively erected on two deckle boards, and two floating drums are arranged in parallel, and described floating
The central axis of cylinder and the central axis upright of the connecting rod are arranged, and the folder between the central axis and horizontal plane of the floating drum
Angle is acute angle.
On the basis of above scheme preferably, the floating drum includes cylinder and connector, and the connector is connected to institute
The two sides of cylinder are stated, and the connector is connected with the deckle board respectively.
On the basis of above scheme preferably, the floating drum is in hollow bowling ball ampuliform, and the floating drum includes big end
And small end, the tail portion of the frame is arranged in the big end, and the spacing between the big end and horizontal plane is greater than the small end
Spacing between horizontal plane.
On the basis of above scheme preferably, one end of the connector is embedded in the floating drum, the connector it is another
One end is installed with attachment base.
On the basis of above scheme preferably, the deckle board is by the rectangular frame-shaped of stainless steel tube simmering and bending, and in the deckle board
Portion is equipped with a transverse tube, and the both ends of the transverse tube are connected with two short sides of the frame respectively.
On the basis of above scheme preferably, it is installed with platform pipe between the transverse tube, the platform pipe is at least two, and
The both ends of the platform pipe are connected with the transverse tube on frame described in two sides respectively.
On the basis of above scheme preferably, it is erected with overlap joint pipe in the long side of the adjacent frame roof, and is taken described
A GPS mounting rod is equipped between adapter tube and one of them described platform pipe.
On the basis of above scheme preferably, the GPS mounting rod is rod-shaped in stretching.
On the basis of above scheme preferably, it is connected on another described platform pipe with tightrope, outside the other end of the tightrope
It connects side and sweeps sound suona horn.
A kind of multi-functional towed body raft assistance platform dragging operation based on side scan sonar tail of the invention, by using frame knot
The Platform Designing of structure formula, so that towed body is cut down, device production is simpler quick, and required time is shorter, and expense is lower, and can be multinomial
Mesh is reused, and compared with the prospecting project cost of saving, ratio for input and output is smaller.
At the same time, the angle design between the central axis and horizontal plane of floating drum of the invention is at an acute angle, that is, uses and incline
The mounting means of oblique axis, it is slightly lower using front end and rear end is slightly higher, at this time the both ends of floating drum respectively with two short side phases of deckle board
Even.Since there are differences in height before and after buoy-axis, the whole machine balancing performance that towed body is cut down can be effectively adjusted, guarantees that towed body is cut down in water
In stationarity.
Detailed description of the invention
Fig. 1 is the perspective view of the multi-functional towed body raft assistance platform of the invention that operation is dragged based on side scan sonar tail；
Fig. 2 is another state diagram of the multi-functional towed body raft assistance platform of the invention that operation is dragged based on side scan sonar tail；
Fig. 3 is the front view of Fig. 1 of the invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Refering to Figure 1, dragging the multi-functional towed body raft of operation to assist based on side scan sonar tail the present invention provides a kind of
Platform, including frame 100 and floating drum 200, wherein frame 100 includes connecting rod 160 and deckle board 110, between two deckle boards 110 are parallel
Every setting, connecting rod 160 is more and 160 both ends of connecting rod are respectively erected on two deckle boards 110, and two floating drums 200 are parallel to each other
Setting, and the central axis upright of the central axis of floating drum 200 and connecting rod 160 is arranged, and the central axis and water of floating drum 200
Angle between plane is acute angle.A kind of multi-functional towed body raft assistance platform dragging operation based on side scan sonar tail of the invention,
By using the Platform Designing of 100 structural formula of frame, so as to cut down device production simpler quick for towed body, required time is shorter,
Expense is lower, and can entry reuse, compared with the prospecting project cost of saving, ratio for input and output is smaller.
At the same time, the angle design between the central axis and horizontal plane of floating drum 200 of the invention is at an acute angle, that is, uses
The mounting means of tilt axis, it is slightly lower using front end and rear end is slightly higher, at this time the both ends of floating drum 200 respectively with deckle board 110 two
A short side is connected.Since there are differences in height before and after 200 axis of floating drum, the whole machine balancing performance that towed body is cut down can be effectively adjusted, is protected
Card towed body cuts down stationarity in water.
Please continue to refer to shown in Fig. 2, floating drum 200 of the invention includes cylinder 210 and connector 220, and connector 220 divides
It is not connected to the two sides of cylinder 210, and connector 220 is connected with deckle board 110 respectively.Pass through the knot of cylinder 210 and connector 220
Structure design, so that the both ends of cylinder 210 can be quickly and easily mounted on frame 100, and using the effect of connector 220, it can
To realize the adjustment to angle between the central axis and horizontal plane of floating drum 200.
Please continue to refer to shown in Fig. 3, floating drum 200 of the invention is in hollow bowling ball ampuliform, and floating drum 200 includes big
End and small end 212, big end are arranged in the tail portion of the frame 100, and the spacing between big end and horizontal plane be greater than small end 212 with
Spacing between horizontal plane, to guarantee the angle between floating drum 200 and horizontal plane as acute angle.
It, should tool in floating drum 200 when use it is worth noting that floating drum 200 of the invention is hollow inflatable air bag
Gas has certain pressure, can be suitably vented when not in use.Floating drum 200 changes the design pattern of the uniform cylindrical body of tradition,
Using towed body raft front floating drum 200, diameter is small and airflow design scheme that rearward diameter is big, and the small towed body raft of changeable is in water
Resistance, swinging for towed body raft tail portion can be effectively reduced during towing, while towed body raft can also be shortened and turned around
Time, weaken rolling.It is installed and designed by the form construction design and floating drum 200 of floating drum 200 and the relative position of frame 100
Also the centre of buoyancy of towed body raft can be made to move back, can effectively weaken pitching.
Simultaneously as the both ends of floating drum 200 be equipped with connector 220, can by connector 220 deckle board 110 short side
Upper height and position adjustment, changes the shaft angle degree of floating drum 200, to adjust the height height before and after 200 axis of floating drum, Ke Yiyou
Effect solves the problems, such as floating drum 200 because diameter it is different caused by towed body raft be statically placed in water when towed body raft lean forward, further guarantor
The stability for demonstrate,proving towed body raft, is conducive to cleaving, reducing water resistance for towed body raft；Hydrostatic still can keep the water of entire towed body raft
It is flat；The centre of buoyancy of towed body raft moves back, and can effectively weaken pitching；Effectively weaken rolling, it is quicker when turning to or turning around.
Preferably, one end of connector 220 of the present invention is embedded in floating drum 200, the other end installing of connector 220
There is attachment base 230, be embedded in floating drum 200 using one end of connector 220, to ensure between connector 220 and floating drum 200
Connective stability, meanwhile, the attachment base 230 of the other end of connector 220 can effectively facilitate floating drum 200 and frame 100
Between connection.
Please continue to refer to shown in Fig. 2, deckle board 110 of the invention is by the rectangular frame-shaped of stainless steel tube simmering and bending, and in deckle board 110
Middle part is equipped with a transverse tube 120, and the both ends of transverse tube 120 are connected with two short sides of frame 100 respectively, keeps its processing simpler
Convenient, structure is more stable, and weight is lighter.
Further, platform pipe 150 is installed between transverse tube 120 of the invention, platform pipe 150 is at least two, and flat
The both ends of platform pipe 150 are connected with the transverse tube 120 in two side frames 100 respectively, to ensure the stability of 100 structure of frame.
Please continue to refer to shown in Fig. 1, it is erected in the long side at 100 top of adjacent frame of the invention and overlaps pipe 130, and
It overlaps and is equipped with a GPS mounting rod 140 between pipe 130 and one of platform pipe 150.Wherein, due to GPS mushroom head quality and
Volume is all smaller, and the stress intensity of GPS bar does not need too greatly, therefore the GPS mounting rod 140 design is rod-shaped in stretching.It utilizes
GPS mounting rod 140 is scalable, height is adjustable, adaptable, and the development of work is facilitated to implement.
In actual use, it is adjusted according to the actual situation, in guarantee GPS signal stabilization, from seawater stormy waves
Under the premise of dip dyeing, the height for adjusting GPS is as low as possible, to guarantee the stability of towed body raft general frame 100, while also reducing
Deviations caused by towed body raft attitudes vibration.Wherein, it is positioned close to float for installing the platform pipe 150 of GPS mounting rod 140
The big end side of cylinder 200, it is towed body raft rear portion closer to center of rotation that GPS, which is mounted on towed body raft by the reason of rear, is dragged
The swing of body raft is smaller, and positioning accuracy is higher；Stress is also smaller simultaneously, safer.
Preferably, with tightrope, sound Suo is swept in the external side of the other end of tightrope for connection on another platform pipe 150 of the invention
?.
Finally, the present processes are only preferable embodiment, it is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (9)
1. a kind of multi-functional towed body raft assistance platform device for dragging operation based on side scan sonar tail, which is characterized in that including frame
And floating drum, the frame include connecting rod and deckle board, two deckle board parallel interval settings, the connecting rod is more and the company
Bar both ends are respectively erected on two deckle boards, and two floating drums are arranged in parallel, and the central axis of the floating drum
It is arranged with the central axis upright of the connecting rod, and the angle between the central axis and horizontal plane of the floating drum is acute angle.
2. a kind of multi-functional towed body raft assistance platform device that operation is dragged based on side scan sonar tail as described in claim 1,
It is characterized in that, the floating drum includes cylinder and connector, and the connector is connected to the two sides of the cylinder, and the company
Connector is connected with the deckle board respectively.
3. a kind of multi-functional towed body raft assistance platform device that operation is dragged based on side scan sonar tail as claimed in claim 2,
It is characterized in that, the floating drum is in hollow bowling ball ampuliform, and the floating drum includes big end and small end, and the big end setting exists
The tail portion of the frame, and the spacing between the big end and horizontal plane is greater than the spacing between the small end and horizontal plane.
4. a kind of multi-functional towed body raft assistance platform device that operation is dragged based on side scan sonar tail as claimed in claim 3,
It is characterized in that, one end of the connector is embedded in the floating drum, and the other end of the connector is installed with attachment base.
5. a kind of multi-functional towed body raft assistance platform device that operation is dragged based on side scan sonar tail as described in claim 1,
It is characterized in that, the deckle board is equipped with a transverse tube, the transverse tube by the rectangular frame-shaped of stainless steel tube simmering and bending in the middle part of the deckle board
Both ends be connected respectively with two short sides of the frame.
6. a kind of multi-functional towed body raft assistance platform device that operation is dragged based on side scan sonar tail as claimed in claim 5,
It is characterized in that, platform pipe is installed between the transverse tube, and the platform pipe is at least two, and the both ends difference of the platform pipe
It is connected with the transverse tube on frame described in two sides.
7. a kind of multi-functional towed body raft assistance platform device that operation is dragged based on side scan sonar tail as claimed in claim 6,
It is characterized in that, overlap joint pipe is erected in the long side of the adjacent frame roof, and described flat with one of them in overlap joint pipe
A GPS mounting rod is equipped between platform pipe.
8. a kind of multi-functional towed body raft assistance platform device that operation is dragged based on side scan sonar tail as claimed in claim 7,
It is characterized in that, the GPS mounting rod is rod-shaped in stretching.
9. a kind of multi-functional towed body raft assistance platform device that operation is dragged based on side scan sonar tail as claimed in claim 7,
It is characterized in that, with tightrope, sound suona horn is swept in the external side of the other end of the tightrope for connection on another described platform pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811538180.3A CN109459755B (en) | 2018-12-16 | 2018-12-16 | Multifunctional towed body raft auxiliary platform based on side-scan sonar tail towing operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811538180.3A CN109459755B (en) | 2018-12-16 | 2018-12-16 | Multifunctional towed body raft auxiliary platform based on side-scan sonar tail towing operation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109459755A true CN109459755A (en) | 2019-03-12 |
| CN109459755B CN109459755B (en) | 2024-03-15 |
Family
ID=65613404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811538180.3A Active CN109459755B (en) | 2018-12-16 | 2018-12-16 | Multifunctional towed body raft auxiliary platform based on side-scan sonar tail towing operation |
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| Country | Link |
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| CN (1) | CN109459755B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995019911A1 (en) * | 1994-01-21 | 1995-07-27 | Kvaerner A.S | Buoyant platform |
| CN201010037Y (en) * | 2007-03-12 | 2008-01-23 | 中国船舶重工集团公司第七一五研究所 | Disomic placement towed body with empennage control |
| US20080252957A1 (en) * | 2006-10-19 | 2008-10-16 | Sagem Defense Securite | Piezoelectric-Motor-Driven Two-Axis Orientation Turret |
| CN101650425A (en) * | 2007-12-28 | 2010-02-17 | 中国科学院声学研究所 | Towed body for self-stabilizing sonar platforms |
| CN105738907A (en) * | 2016-04-06 | 2016-07-06 | 国家海洋局第二海洋研究所 | Auxiliary side-scan sonar operation device |
| US9457900B1 (en) * | 2014-04-07 | 2016-10-04 | The United States Of America, As Represented By The Secretary Of The Navy | Multirotor mobile buoy for persistent surface and underwater exploration |
| CN108008397A (en) * | 2017-11-30 | 2018-05-08 | 舟山遨拓海洋工程技术有限公司 | For the device and its detection method being detected in muddy water to submerged structure |
| CN209296919U (en) * | 2018-12-16 | 2019-08-23 | 中交广州航道局有限公司 | A kind of towed body raft frame waterborne dragging operation based on side scan sonar tail |
-
2018
- 2018-12-16 CN CN201811538180.3A patent/CN109459755B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995019911A1 (en) * | 1994-01-21 | 1995-07-27 | Kvaerner A.S | Buoyant platform |
| US20080252957A1 (en) * | 2006-10-19 | 2008-10-16 | Sagem Defense Securite | Piezoelectric-Motor-Driven Two-Axis Orientation Turret |
| CN201010037Y (en) * | 2007-03-12 | 2008-01-23 | 中国船舶重工集团公司第七一五研究所 | Disomic placement towed body with empennage control |
| CN101650425A (en) * | 2007-12-28 | 2010-02-17 | 中国科学院声学研究所 | Towed body for self-stabilizing sonar platforms |
| US9457900B1 (en) * | 2014-04-07 | 2016-10-04 | The United States Of America, As Represented By The Secretary Of The Navy | Multirotor mobile buoy for persistent surface and underwater exploration |
| CN105738907A (en) * | 2016-04-06 | 2016-07-06 | 国家海洋局第二海洋研究所 | Auxiliary side-scan sonar operation device |
| CN108008397A (en) * | 2017-11-30 | 2018-05-08 | 舟山遨拓海洋工程技术有限公司 | For the device and its detection method being detected in muddy water to submerged structure |
| CN209296919U (en) * | 2018-12-16 | 2019-08-23 | 中交广州航道局有限公司 | A kind of towed body raft frame waterborne dragging operation based on side scan sonar tail |
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| CN109459755B (en) | 2024-03-15 |
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