Marine type captive balloon system and using method thereof

文档序号:672009 发布日期:2021-04-30 浏览:40次 中文

阅读说明:本技术 一种海洋型系留气球系统及其使用方法 (Marine type captive balloon system and using method thereof ) 是由 史章磊 彭怀利 张如义 肖红立 刘宏磊 于 2021-03-02 设计创作,主要内容包括:本发明提供一种海洋型系留气球系统及其使用方法。所述海洋型系留气球系统包括系留气球、系留缆绳、锚泊拉索和锚泊车,所述锚泊车内设有多个存储室和一个绞盘,所述系留缆绳远离系留气球的一端与所述绞盘连接;所述系留气球分别形成释放状态、锚泊状态和运输状态:在所述释放状态时,所述系留气球升空并远离所述锚泊车;在所述锚泊状态时,所述系留气球靠近所述锚泊车,并通过锚泊支臂支撑,所述锚泊拉索覆盖所述系留气球且所述锚泊拉索与所述锚泊支臂连接;在所述运输状态时,所述系留气球置于所述存储室内。与相关技术相比,本发明提供的海洋型系留气球系统具备长期滞空、使用便捷、抗恶劣海况等优点。(The invention provides an ocean type captive balloon system and a using method thereof. The marine type captive balloon system comprises a captive balloon, a captive cable, a mooring guy cable and a mooring vehicle, wherein a plurality of storage chambers and a winch are arranged in the mooring vehicle, and one end, far away from the captive balloon, of the captive cable is connected with the winch; the captive balloon forms a release state, a mooring state and a transport state, respectively: in the released state, the captive balloon is airborne and parked away from the anchor; when the anchoring state is achieved, the mooring balloon is close to the anchor for parking and is supported by the anchoring support arm, the mooring pull rope covers the mooring balloon, and the mooring pull rope is connected with the anchoring support arm; in the transport state, the captive balloon is disposed within the storage chamber. Compared with the related technology, the marine type captive balloon system provided by the invention has the advantages of long-term air stagnation, convenience in use, severe sea condition resistance and the like.)

1. An ocean type captive balloon system comprises a captive balloon (1) with an emergency deflation device (10), and a captive cable (3) connected to the captive balloon (1), and is characterized by further comprising a mooring cable (13) and a mooring vehicle (4), wherein a plurality of storage chambers and a winch (15) are arranged in the mooring vehicle (4), and one end, far away from the captive balloon (1), of the captive cable (3) is connected with the winch (15); the captive balloon (1) forms a release state, an anchoring state and a transport state respectively: in the released state, the captive balloon (1) is airborne and moved away from the anchor parking vehicle (4); when in the anchoring state, the mooring balloon (1) is close to the anchoring vehicle (4) and is supported by a plurality of anchoring support arms (19) movably inserted at the periphery of the top of the anchoring vehicle (4), the anchoring pull rope (13) covers the mooring balloon (1), and the anchoring pull rope (13) is connected with the anchoring support arms (19); in the transport state, the captive balloon (1) is placed in the storage chamber.

2. An ocean-type captive balloon system according to claim 1 wherein the captive balloon (1) is of oblate spheroid configuration; when the captive balloon (1) is in a release state, a wind vane (5) is arranged on the captive mooring rope (3), and the wind vane (5) is located between the captive balloon (1) and the anchor parking device (4).

3. Marine type captive balloon system according to claim 1 or 2, wherein the mooring arm (19) comprises a bracket (191) and an inflatable pillow (192), one end of the bracket (191) is inserted into the mooring vehicle (4), the other end is bent obliquely towards the top and outside of the mooring vehicle (4) and the inflatable pillow (192) is mounted, and the inflatable pillow (192) is in contact with the captive balloon (1).

4. Marine-type captive balloon system according to claim 1 or 2, wherein the captive balloon (1) is provided with a kite tail (7) at its lower part, the kite tail (7) comprising a curtain and a keel (8) mounted on the curtain, the curtain being connected to the captive balloon (1).

5. An ocean-type captive balloon system according to claim 1 or claim 2 further comprising a strobe light (9), a controller (11) and an on-ball battery (6), the strobe light (9) being mounted on top of the captive balloon (1), the on-ball battery (6), the strobe light (9), the controller (11) and the emergency deflation device (10) being electrically connected.

6. An ocean-type captive balloon system according to claim 1 or 2, further comprising a load device (2) for real-time detection and information transfer of sea surface targets, the load device (2) being provided on the belly or empennage of the captive balloon (1).

7. An ocean-type captive balloon system according to claim 1 or claim 2 wherein one end of the anchor vehicle (4) is provided with a control panel (21), an under-ball power supply device (17) is provided within the anchor vehicle (4), the control panel (21), the winch (15) and the under-ball power supply device (17) being electrically connected; the anchor parking device (4) is also internally provided with a gas cylinder and a pipeline (16), and the gas cylinder and the pipeline (16) are arranged close to the bottom of the anchor parking device (4); and a plurality of round holes (23) are formed on the periphery of the base of the anchor parking device (4).

8. An ocean-type captive balloon system according to claim 1 or claim 2 further comprising a guide frame (20), the guide frame (20) comprising a guide block (202) having a central bore (201), and a plurality of guide legs (203) distributed along the guide block (202) in a launching arrangement, the guide legs (203) being removably attached to the top of the mooring vehicle (4), the captive cable (3) passing through the central bore (201).

9. An ocean-type captive balloon system according to claim 1 or 2, wherein the anchor vehicle (4) is provided with lifting lugs (18) and a fixed bracket (25) for placing anchor arms (19), wherein the fixed bracket (25) is provided with a number of jacks corresponding to the number of the anchor arms (19), the lifting lugs (18) are arranged at the top of the anchor vehicle (4), and the fixed bracket (25) is arranged in the anchor vehicle (4).

10. A method of using a marine-type captive balloon system according to any one of claims 1 to 9, comprising:

and (3) releasing state:

mounting anchoring arms (19) at the periphery of the anchoring vehicle (4); starting a winch (15) to release the mooring rope (3), installing a mooring balloon (1) at the tail end of the mooring rope (3), and inflating the mooring balloon (1) to enable the mooring balloon (1) to be lifted to work;

when the captive balloon (1) meets an emergency, the emergency deflation device (10) is started to tear the captive balloon (1) and fall back to the ground;

anchoring state:

anchoring the captive balloon (1) on the anchoring arm (19) by using an anchoring pull line (13);

and (3) a transportation state:

deflating and folding the captive balloon (1), placing the captive balloon in a hand bag, and placing the captive balloon in a storage chamber of the anchor parking device (4); the anchoring arm (19) is detached and placed inside the anchoring vehicle (4).

Technical Field

The invention relates to the technical field of marine informatization construction, in particular to a marine type captive balloon system and a using method thereof.

Background

The mooring balloon system is used as a fixed-point air platform which can be deployed on a ship and synchronously fly along with the ship, and can complete real-time detection and information transmission of low-altitude targets (low altitude, unmanned and the like) on the sea surface and sea surface targets such as ships and warships through long-time dead space of equipment carrying monitoring/communication loads and the like, so that long-time monitoring on the sea area is realized, the mooring balloon system can also be used as beneficial supplement of detection means such as ship-borne radars and the like, and the detection distance and the wireless communication distance of the sea surface targets are greatly extended.

The existing marine type captive balloon system mostly adopts a conventional streamline balloon structure, and a main winch, a guy cable winch and other retracting devices and a rotary platform, a nose cone and other anchoring devices are arranged on the ground.

The existing marine type captive balloon system is complex in structure, large in overall dimension of a spherical captive balloon, long in deployment time, large in space required by deployment, high in cost and mainly used for large-scale offshore operation platforms.

Disclosure of Invention

The invention aims to provide a low-cost marine type captive balloon system with long-term air stagnation, convenience in use and severe sea condition resistance and a using method thereof, and the marine type captive balloon system has the characteristics of simple structure, light weight, high integration level and the like, can be deployed on small ships such as fishing boats and the like or large offshore operation platforms, and can also execute tasks inland.

The technical scheme of the invention is as follows: a marine type captive balloon system comprises a captive balloon with an emergency deflation device, a captive cable connected to the captive balloon, a mooring guy cable and a mooring vehicle, wherein a plurality of storage chambers and a winch are arranged in the mooring vehicle, and one end, far away from the captive balloon, of the captive cable is connected with the winch; the captive balloon forms a release state, a mooring state and a transport state, respectively: in the released state, the captive balloon is airborne and parked away from the anchor; when the anchoring state is realized, the mooring balloon is close to the anchoring vehicle for parking and is supported by a plurality of anchoring support arms movably inserted at the periphery of the top of the anchoring vehicle, the anchoring pull rope covers the mooring balloon and is connected with the anchoring support arms; in the transport state, the captive balloon is disposed within the storage chamber.

Preferably, the captive balloon is of an oblate spheroidal configuration; when the captive balloon is in a release state, a wind vane is arranged on the captive mooring rope and is positioned between the captive balloon and the anchoring vehicle.

Preferably, the anchoring support arm comprises a support and an inflatable pillow, one end of the support is inserted into the anchoring vehicle, the other end of the support is obliquely bent towards the top and the outer side of the anchoring vehicle, the inflatable pillow is mounted on the support, and the inflatable pillow is in contact with the mooring balloon.

Preferably, a kite tail wing is arranged at the lower part of the captive balloon, the kite tail wing comprises a curtain cloth and a keel arranged on the curtain cloth, and the curtain cloth is connected with the captive balloon.

Preferably, the marine type captive balloon system further comprises a strobe light, a controller and an on-ball battery, wherein the strobe light is mounted at the top of the captive balloon, and the on-ball battery, the strobe light, the controller and the emergency deflation device are electrically connected.

Preferably, the marine type captive balloon system further comprises a load device for detecting and transmitting information about a sea surface target in real time, wherein the load device is arranged on the belly or the tail of the captive balloon.

Preferably, a control panel is arranged at one end of the anchor parking vehicle, an under-ball power supply device is arranged in the anchor parking vehicle, and the control panel, the winch and the under-ball power supply device are electrically connected; the anchor parking device is characterized in that an air bottle and a pipeline are further arranged in the anchor parking device, and the air bottle and the pipeline are arranged close to the bottom of the anchor parking device; and a plurality of round holes are arranged on the periphery of the base of the anchor parking vehicle.

Preferably, the marine-type captive balloon system further comprises a guide frame, the guide frame comprising a guide block having a central bore, and a plurality of guide legs extending radially along the guide block, the guide legs being removably attached to a top portion of the anchor vehicle, the captive cable extending through the central bore.

Preferably, the anchoring vehicle is provided with lifting lugs and a fixed support for placing anchoring support arms, the fixed support is provided with jacks corresponding to the anchoring support arms in number, the lifting lugs are arranged at the top of the anchoring vehicle, and the fixed support is arranged in the anchoring vehicle.

The invention also provides a use method of the marine type captive balloon system, which comprises the following steps:

and (3) releasing state:

mounting anchoring support arms at the periphery of anchoring vehicles; starting the winch to release the mooring cable, installing a mooring balloon at the tail end of the mooring cable, and inflating the mooring balloon to enable the mooring balloon to lift off for working;

when the captive balloon meets an emergency, the emergency deflation device is started to tear the captive balloon and fall back to the ground;

anchoring state:

anchoring the captive balloon on the anchoring support arm using an anchoring pull line;

and (3) a transportation state:

deflating and folding the captive balloon, placing the captive balloon in a hand bag, and placing the captive balloon in a storage chamber of the anchor parking; and (4) detaching the anchoring support arm and placing the anchoring support arm inside the anchoring vehicle.

Compared with the related technology, the invention has the beneficial effects that:

the marine type captive balloon system is simple in structure and light in weight, can be transferred to a ship through a crane or a forklift, can be deployed on small ships such as fishing boats or large offshore operation platforms, and can also perform tasks on the inland;

the ocean type captive balloon system adopts a spherical captive balloon floating platform with a kite tail wing, can generate larger pneumatic lift force by utilizing wind power, realizes normal flying and air-stagnation flying in a strong wind environment, and can normally work under severe sea conditions;

the ocean type captive balloon system integrates various functional devices such as storage, expansion, mooring, recovery and helium gas guarantee in the mooring vehicle, is simple in use and operation process, requires a small deployment space, and meets the use requirements of small ships such as fishing boats;

the marine type captive balloon system has the functions of seaworthiness at night and emergency deflation in emergency, and can be reinforced by fixing the anchor on a ship or other fixed objects when being used on the ship, so that the use safety is high;

and fifthly, the mooring balloon system presses the mooring balloon on the inflatable pillow of the mooring support arm through the mooring guy cable with the net structure, the mooring balloon has large stress area and strong anchoring wind resistance.

Drawings

FIG. 1 is a schematic structural view of a released state of an ocean type captive balloon system provided by the present invention;

FIG. 2 is a schematic illustration of a tethered balloon in an offshore-type tethered balloon system provided by the present invention;

FIG. 3 is a schematic front view of an anchoring state of the marine type captive balloon system provided in accordance with the present invention;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a top plan view of a mooring vehicle in the marine type captive balloon system provided by the present invention;

fig. 6 is a schematic structural view of a transportation state of the marine type captive balloon system according to the present invention.

In the drawings: 1-captive balloon; 2-a load device; 3-mooring the cable; 4-anchoring and parking; 5-wind vane; 6-battery on ball; 7-kite tail fin; 8-keel; 9-strobe light; 10-emergency deflation device; 11-a controller; 12-a cable; 13-mooring guy cable; 14-a first storage compartment; 15-a winch; 16-gas cylinder and pipeline; 17-an under-ball power supply device; 18-a lifting lug; 19-anchoring support arm, 191-support and 192-inflatable pillow; 20-a guide frame, 201-a central hole, 202-a guide block and 203-a guide support leg; 21-a control panel; 22-a second storage compartment; 23-a circular hole; 24-a third storage compartment; and 25, fixing the bracket.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

As shown in fig. 1, the marine type captive balloon system provided in this embodiment includes a captive balloon 1, a load device 2, a captive cable 3, a mooring car 4, a wind vane 5, an on-ball battery 6, a kite tail 7, a strobe light 9, an emergency deflation device 10, a controller 11, a cable 12, a mooring guy cable 13, a first storage compartment 14, a winch 15, an air bottle and pipeline 16, an off-ball power supply device 17, a lifting lug 18, a mooring arm 19, a guide frame 20, a control panel 21, a second storage compartment 22, a third storage compartment 24, and a fixed bracket 25.

The captive balloon 1 is oblate in shape. The kite tail wing 7 is arranged at the lower part of the captive balloon 1, the kite tail wing 7 comprises curtain cloth and a keel 8 installed on the curtain cloth, and the curtain cloth is fixedly connected with the captive balloon 1. The keel 8 is formed by splicing a plurality of detachable carbon fiber rods, is arranged on the corresponding position of the curtain cloth during use, and is taken down and detached during storage or transportation. The kite tail wing 7 is in a space triangle shape, and the effect of the captive balloon 1 on wind is achieved.

The load equipment 2 is arranged on the belly or the empennage of the captive balloon 1 and comprises a visible light/infrared monitoring load, an AIS (automatic identification system) ship automatic identification system, wireless communication equipment and the like, so that real-time detection and information transmission of a sea surface target are realized. The device can be replaced by other devices for video monitoring, wireless communication and the like according to the use requirement.

As shown in fig. 3 and 4, the control panel 21 is disposed at one end of the anchor vehicle 4 near the top, and a plurality of storage chambers and a winch 15 are disposed in the anchor vehicle 4. The end of the mooring line 3 remote from the mooring balloon 1 is connected to the winch 15. The plurality of storage compartments include a first storage compartment 14, a second storage compartment 22, and a third storage compartment 24. The first storage room 14 is provided at the rear side of the control panel 21, and the second storage room 22 and the third storage room 24 are provided below the first storage room 14 and at both sides of the anchor vehicle 4. The capstan 15 is provided between the second storage room 22 and the third storage room 24 (shown in fig. 4). The gas cylinder and the pipeline 16 are arranged below the second storage chamber 22, the third storage chamber 24 and the winch 15 (namely, the inside of the anchoring vehicle 4 is close to the bottom), and the under-ball power supply device 17 is arranged beside the gas cylinder and the pipeline 16. The three storage chambers are internally provided with ground electrical elements, a storage ball battery 6, a strobe light 9, an emergency air-release device 10, a controller 11, an inflation tube and other functional components.

The control panel 21 is electrically connected with the winch 15 and the under-ball power supply device 17, and the control panel 21 is used for controlling the on-off and speed of the winch 15, displaying the tension of the mooring cable 3, the voltage of the under-ball power supply device 17 and the like. The winch 15 is generally an electric winch. The under-ball power supply device 17 is preferably a battery and is provided with mains connection means for powering surface equipment.

The gas cylinder and the pipeline 16 are stored at the bottom of the anchor vehicle 4, and are composed of five standard 40L helium gas cylinders, each gas cylinder can provide helium gas of about 5m3 for the captive balloon 1 to use, and is connected with the gas charging pipe in the second storage chamber 22 through a high-pressure gas pipe, and the gas cylinder can be directly detached and replaced or supplied with gas after being used.

The captive balloon 1 may be moored during long waits to perform a task (as shown in figures 3 and 4). The periphery of the top of the anchoring vehicle 4 is movably inserted with four anchoring support arms 19, the anchoring pull rope 13 covers the mooring balloon 1, and the anchoring pull rope 13 is connected with the anchoring support arms 19. The anchoring pull rope 13 is of a net structure, penetrates through the captive balloon 1 during anchoring and is connected with the four anchoring support arms 19 for anchoring the captive balloon 1. When the captive balloon 1 is lifted off for work, the mooring guy cable 13 needs to be taken down.

The anchoring arm 19 comprises a bracket 191 and an inflatable pillow 192, one end of the bracket 191 is inserted into the circular tube of the anchoring vehicle 4, and the other end of the bracket is bent obliquely towards the top and the outer side of the anchoring vehicle 4 and is provided with the inflatable pillow 192. The bending angle of the bracket 191 is an obtuse angle and is in circular arc transition. The inflatable pillow 192 is in contact with the captive balloon 1. In other embodiments, the inflatable pillow may be replaced with a rigid cylinder or a bracket.

The anchoring vehicle 4 is an integrated device by the above structural design, and ground functional components such as a winch 15, an under-ball power supply device 17, a control panel 21, an air bottle and pipeline 16, an anchoring support arm 19 and the like are integrated in the integrated device.

As shown in fig. 4, a plurality of circular holes 23 are formed on the periphery of the base of the anchoring vehicle 4, and the anchoring vehicle 4 can be fastened on a ship or other fixed objects through the circular holes 23, so that the anti-overturning capability of the system is improved. After the marine type captive balloon system reaches a deployment point, for example, when the system is used on a ship, the system can be tied on the ship or other fixed objects through the round hole 23 on the anchor parking device 4, and the system can be directly used when the system is not used on the ship.

As shown in fig. 5 and 6, the fixing bracket 25 is provided with insertion holes corresponding to the number of the anchoring arms 19. The fixed bracket 25 is disposed within the anchor vehicle 4. During storage, the anchoring arms 19 are detached and inserted into the jacks one by one, and the anchoring arms 19 are completely placed in the anchoring vehicle 4.

The lifting lugs 18 are provided in plurality on the top periphery of the anchor vehicle 4. When the system is transported, the system can be lifted by the lifting lugs 18 or transported by a forklift. The lifting lugs 18 are used in a handling system.

As shown in fig. 5, the guide frame 20 includes a guide block 202 having a central hole 201, and a plurality of guide legs 203 radially distributed along the guide block 202, the guide legs 203 being detachably connected to the top of the anchor vehicle 4, and the mooring line 3 passing through the central hole 201. The guide frame 20 may be mounted upwardly (as shown in fig. 3) or downwardly (as shown in fig. 6) for guiding the mooring line 3.

As shown in fig. 1, the mooring rope 3 is a high-strength light-weight bearing rope made of high-molecular polyethylene or other materials, and a plurality of wind vanes 5 are arranged on the mooring rope 3 and arranged along the length of the mooring rope 3. The wind vane 5 is positioned between the captive balloon 1 and the mooring vehicle 4, so that the position of the captive cable 3 can be displayed after the captive balloon 1 is lifted off.

The curtain cloth of the kite tail wing 7 is provided with a battery pack, and the battery 6 on the kite is arranged in the battery pack and used for supplying power to the load equipment 2, the stroboscopic lamp 9, the emergency deflation device 10 and the controller 11.

As shown in fig. 2, the strobe light 9 is mounted on top of the captive balloon 1 to provide nighttime seaworthiness safety. An emergency deflation device 10 and a controller 11 are installed at the tail part of the captive balloon 1, and the emergency deflation device 10 is used for tearing the captive balloon 1 under emergency conditions such as escape of the captive balloon 1 and emergency deflation. The controller 11 is used for controlling the on and off of the stroboscopic lamp 9 and the emergency relief device 10. The strobe light 9 and the emergency deflation device 10 are connected with a controller 11 through cables 12, and the controller 11 is connected with the battery 6 on the ball through the cables 12.

The invention also provides a use method of the marine type captive balloon system, which comprises the following steps:

as shown in fig. 1, the released state:

the guide frame 20 is installed on the anchored vehicle 4 upwards, the anchoring support arms 19 are installed in four round pipes of the anchored vehicle 4, a ground power switch is turned on or the ground power switch is connected with commercial power to electrify ground equipment, the winch 15 is controlled through the control panel 21 to release the mooring rope 3, and the mooring rope 3 penetrates through the guide frame 20 to be connected with the unfolded mooring balloon 1. The keel 8, the strobe light 9, the emergency deflation device 10 and the controller 11 are arranged on the captive balloon 1, the captive balloon 1 is connected with the inflation tube, the captive balloon 1 is inflated, the battery 6 and the load equipment 2 are arranged and connected on the balloon after the inflation, and the captive balloon 1 can be lifted to work. During the lift-off process, the wind vane 5 is tied on the captive balloon 1.

When the captive balloon 1 is in emergency such as being detached and floating, the remote controller 11 and the emergency deflation device 10 tear the captive balloon 1 and quickly fall to the ground.

As shown in fig. 3 and 4, the anchoring state:

the captive balloon 1 may be anchored during long waits to perform a task. When anchoring, the kite keel 8, the battery 6 on the balloon and the loading device 2 are detached, and the captive balloon 1 is anchored on the inflatable pillow 192 of the anchoring arm 19 by using the anchoring pull rope 13.

As shown in fig. 6, the transport state:

after use, the battery 6 and the loading device 2 are removed, and the captive balloon 1 is deflated. The keel 8, the strobe light 9 and the emergency air-release device 10 are detached in the air-release process. The captive balloon 1 is folded and packed into the containing bag after deflation, the containing bag is placed above the power supply equipment 17 under the balloon, the keel 8 is disassembled and packed into the containing bag and placed on the side surface of the winch 15, and other disassembled equipment on the balloon is placed in the second storage chamber 22 and the third storage chamber 24 of the anchor vehicle 4 for storage. The guide frame 20 is mounted downward on the anchor car 4, and the anchor arms 19 are detached from the fixed brackets 25 at the rear end of the anchor car 4 to restore the anchor car 4 to a storage (transportation) state.

The whole system of the captive balloon system is integrated in a mooring vehicle for transportation, the weight and the size of the system meet the shipborne use requirement and the national transportation standard, the total weight of the system is not more than 0.8t, and the volume of the mooring vehicle is not more than 2.5m3

The mooring system provided by the invention has the following beneficial effects:

the first is the system structure form: the system mainly comprises a mooring balloon, load equipment, a mooring cable and an anchor vehicle, wherein the mooring balloon is oblate and provided with a semi-hard kite tail wing, and the load equipment is arranged on the belly or the tail wing of the mooring balloon. The anchoring and parking integrated equipment comprises a winch, under-ball power supply equipment, a control panel, a gas cylinder, a pipeline, an anchoring support arm and full-system equipment. The structure has simple form, complete functions and strong wind resistance, and is suitable for executing tasks under complex sea conditions;

secondly, system layout: the system highly integrates various functional devices such as storage, expansion, mooring, recovery, helium gas guarantee and the like into the mooring vehicle, has light overall weight and small required deployment space, and meets the use requirements of small ships such as fishing boats and the like.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

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