JP2877258B2 - Tow antenna - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tow antenna in which a plurality of antenna lines towed by a ship or the like have a proper interval, depth and the like.

[0002]

2. Description of the Related Art FIG. 6 is a perspective view of a conventional towing antenna towed by a ship.

[0003] In the figure, the tow antenna comprises a ship 01, a winch 02, a tow cable 03, a tow balance 04, a branch tow antenna 05, and a branch tow antenna 06.

To explain the operation of the tow antenna, the winch 02 is installed at the tail of the vessel 01. At first, the tow cable 02, the tow balance 04, the branch tow antenna 05 and the tow antenna 06 are wound around the winch 02.

[0005] As the next operation, while the ship 01 is moving forward, the winch 02 is moved to the branch and tow antenna 05 and 06.
At the same time, next, the towing balance 04 is extended, and finally, the towing cable 03 is extended to a predetermined length. After that, the vessel 01 has the towing balance 04 horizontal and tow them. During this towing, the branch towing antenna 05 and the branch towing antenna 06 are kept at an interval by the towing balance 04 so that they do not become entangled with each other. However, the branch towing antenna 06 may come above the branch towing antenna 05, or in extreme cases, the branch towing antenna 05 and the branch towing antenna 06 may be entangled. When changing the depth of the branch towing antennas 05 and 06, it is necessary to change the length of the towing cable 03 or to adjust the towing speed of the vessel 01.

Further, the distance between the branch towing antenna 05 and the branch towing antenna 06 is fixed by the towing balance 04 and cannot be freely changed during towing.

[0007]

The conventional towing antenna has the following problems to be solved.

That is, when the ship turns, it is difficult for the two branch tow antennas to be parallel and horizontal with each other, and the two cables are turned up and down, or the tow balance is rotated to twist the tow cable. Problem. There is also a problem that the depth of the branch tow antenna cannot be changed unless the length of the tow cable or the towing speed of the ship is changed. Further, there is a problem that the interval between the branch towing antennas is fixed and cannot be changed during towing.

According to the present invention, the distance between two branch tow antennas is always kept constant, the two branch tow antennas are always aligned in parallel and horizontally, the tow balance is not rotated, and the tow cable is not used. It is an object of the present invention to provide a tow antenna that can change the depth of a branch tow antenna while keeping the length of a ship and the towing speed of a ship constant.

[0010]

According to the present invention, there is provided a fuselage capable of being towed in water, horizontal fixed wings provided substantially symmetrically on the left and right sides of the fuselage, and a surface of the fixed wing. The movable wing is provided substantially along the front end or the rear end thereof and is rotatable up and down, and an antenna line towed from a position maintaining a required interval in the lateral direction of the fuselage. It is intended to provide a tow antenna characterized by the following.

[0011]

The present invention is configured as described above and has the following effects.

That is, since the horizontal fixed wings are provided substantially symmetrically on the left and right sides of the towable body, a relatively wide surface is maintained in the water along the traveling direction. , The fuselage roll is stable and the pitch is relatively stable. In addition, the body is generally large in the left, right, up and down directions,
That is, since the length in the front-rear direction with respect to the towing is larger than the width and the height, the yaw is also stabilized.

[0013] Further, since movable wings are provided along the surface of the fixed wing so that either the front end or the rear end thereof can rotate up and down, for example, the fixed wing has its hydraulic center at the fuselage, the fixed wing and the like as a whole. If the movable wing is located on the line passing through the center of gravity or the vicinity of the buoyant center,
If the rear end of the movable wing is simultaneously turned upward and downward, the flow causes a head-lifting moment with respect to the center of gravity and the like, and if it is turned downward, a head-down moment is generated. Therefore, pitch control, that is, control of the water depth of the towing antenna Becomes possible. If one of the left and right movable wings is turned up and the other is turned down, roll control, that is, left and right horizontal control of the towing antenna becomes possible for the same reason. When the movable wing is provided on the leading edge side of the fixed wing, the movable wing is attached such that the front end of the movable wing rotates vertically. If a pair of left and right movable wings are further provided behind, that is, at a position sufficiently distant from the center of gravity or the like, the pitch moment can be increased, so that water depth control can be performed efficiently. A fixed wing and a movable wing for yaw stabilization may be used together to stably perform the above operation.

As described above, since the antenna line is towed from the position where the required spacing between the right and left sides of the fuselage is stabilized,
The required spacing of the antenna lines is always horizontal to one another.

Further, the water depth of the antenna line can be controlled without increasing or decreasing the speed of a towing ship or the like.

Here, the term "antenna wire" naturally includes a rod-like body used as an antenna.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall perspective view of the present embodiment, FIG. 2 is an enlarged perspective view of the variable depth towing body 4 of FIG. 1, and FIG. 3 is a longitudinal section (partly) showing the expanded state of the hollow rod 20 of FIG. FIG. 4 and FIG. 4 are views showing the contracted state.

First, the present embodiment will be outlined with reference to FIG.
1 is a ship, 2 is a winch, 3 is a tow cable, 4 is a variable depth tow body, and 5 and 6 are branch tow antennas. In these configurations, reference numerals 1 to 6 are conventional reference numerals 01 to 0.
6 except for the variable-depth towing body 4 corresponding to 04, there is no significant difference from the conventional example.

That is, in this embodiment, the variable depth tow body 4 is used in place of the conventional towing balance 04. Is controlled so as to be held horizontally by itself, so that the towing antenna 5 and the towing antenna 5 are towed at a constant interval, parallel and horizontally.

Therefore, the positions of the branch towing antennas 5 and 6 do not change in the vertical direction. Also, the towing cable 3 is not twisted. Further, the entire depth can be freely adjusted.

Next, the details of the variable depth towing body 4 will be described with reference to FIG. In the figure, 11 is the fuselage of the variable depth towing body 4, 12 is the fixed front wing, 13 is the movable front wing, 14 is the fixed tail, 15 is the fixed rudder, 16 is the movable tail, 17 is the movable rudder, and 18 is the servo. The rotation axis of the motor 19, 19 is a servomotor used for depth adjustment, 20 is a branch towing antenna 5,6
, A reference numeral 21 denotes a rack engraved on the hollow rod 20, a reference numeral 22 denotes a pinion for the rack 21,
Reference numeral 4 denotes an inclination sensor, reference numeral 25 denotes a battery, and reference numeral 26 denotes an antenna mounting bracket for mounting the branch towing antennas 5, 6.

Next, the operation of the above configuration will be described. Torso 11
The tow cable 3 is connected to the tip of the torso, and the body 11 is towed by the tension of the tow cable 3. The body 11 has a pressure-resistant structure, has a water-tight structure, and can sink several tens of rice. Fixed front wings 12 on the port and starboard sides of fuselage 11
There is a telescopic hollow rod 20 at the tip of the fixed front wing 12 on the right and left sides, and the antenna mounting bracket 26 is fixed to this.

A pinion 22 is engaged with a rack 21 at one end of each hollow rod 20, and the pinion 22 is rotated by the rotation of the servo motor 19, and the hollow rod 20 is moved in and out of the body 11 through the rack 21. . Thereby, the interval between the antenna mounting brackets 26 is controlled.

The horizontal holding in the water is performed as follows. An inclination sensor 24 disposed inside the fuselage 11 detects the inclination of the variable depth tow body 4 with respect to the earth axis, sends this signal to the vessel 1 through the towing cable 3, and controls the rotation speed of the servo motor 19 based on this signal. The signal is converted into a signal which can be transmitted to five servo motors 19. The two movable front wings 13, the two movable tails 16, and the one movable rudder 17 are respectively moved by the rotation of the servomotor 19, and the lift in the left, right, front and rear directions is automatically adjusted to an optimum value, thereby enabling the variable depth towing body 4 to be adjusted. Is held horizontally in the water.

The branch towing antennas 5 and 6 in the form of cables pass through the hollow rod 20 as shown in FIG. 3 and the like, and merge at the center to form the towing cable 3, which is electrically connected to each other. I have.

The branch towing antennas 5 and 6 are connected to an antenna fitting 26 and towed. The battery 25 is a power source for the servomotor 19 and the tilt sensor 24.

When it is desired to change the depth of the variable-depth tow body 4, the servo motor 19 is connected to the ship 1 via the towing cable 3.
The two movable front wings 13, the two movable tails 16, and the one movable rudder 17 are moved by the rotation of the servo motor 19, and the lift is changed to change the depth.

Also, by constantly monitoring the signal transmitted from the tilt sensor 24, the variable depth towed body 4 can be tilted,
It can be confirmed on the side of the ship 1 that it has not rotated.

When it is desired to catch radio waves of several tens of U.S. seas, the servomotor 19 is operated by a signal transmitted from the ship 1 via the towing cable 3 to change the angles of the movable front wing 13 and the movable tail 16 to move the fuselage 11. Let go underwater.

The antenna mounting bracket 26 normally extends the hollow rod 20 to the right and left during towing as shown in FIG. 3 so that it can catch a wide area in the extended state, and contracts as shown in FIG. The two hollow rods 20 are stepped in order to lengthen the expansion and contraction allowance.

FIG. 5 is a diagram showing a second embodiment of the present invention. In the case where the branch towing antennas 5 and 6 are very long, the branch towing antenna 5 is used.
Since the interval between 6 and 6 is no longer constant and they are entangled with each other,
A plurality of variable-depth towed bodies 4 are continuously attached. Even the long branch towing antennas 5 and 6 can be held parallel and horizontal.

In this embodiment, the battery 25 is used as a power source. However, an external power source can be used as an alternative power source for the battery 25. In this case, a power conductor is incorporated in the towing cable 3. Power is supplied from the vessel 1 via the towing cable 3 to drive the servomotor 19, etc.
The choice of these means is free without departing from the purpose of the invention.

As described above, according to the first and second embodiments, there is an advantage that a plurality of branch tow antennas 5 and 6 can be towed at a constant interval from each other and horizontally.

Further, there is an advantage that the water depth of the branch towing antennas 5 and 6 can be freely adjusted without changing the speed of the ship 1.

[0035]

The present invention has the following effects because it is configured as described above.

That is, a plurality of antenna wires can be towed horizontally at the same water depth while maintaining a required interval at all times, and are not entangled or twisted.

Further, the water depth of the antenna line can be freely controlled without adjusting the speed of a towing vessel or the like.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of the variable depth towing body 4 of FIG.

FIG. 3 is a longitudinal sectional view showing an expanded state of the hollow rod 20 of FIG. 2;

FIG. 4 is a view showing a contracted state of the hollow rod 20 of FIG. 3;

FIG. 5 is an overall perspective view of a second embodiment of the present invention.

FIG. 6 is a perspective view of a conventional example.

Claims (1)

(57) [Claims] 1. A fuselage capable of being towed in water, a horizontal fixed wing provided substantially symmetrically on the left and right sides of the fuselage, and one of a front end and a rear end provided substantially along the surface of the fixed wing. A towing antenna comprising: a movable wing rotatable up and down; and an antenna line towed from a position keeping a required interval in the lateral direction of the fuselage.