JPH0646017Y2 - Multi-core cable for underwater array type sensor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a multi-core cable used in an array type sensor which is used in water such as a sea or a lake, and in which a plurality of sensors are vertically arranged in water.

[Conventional technology]

FIG. 3 is a side view showing an outline of a conventional underwater array type sensor.

In the figure, reference numeral 1 denotes, for example, a levitation body which has a cylindrical shape and whose upper end is levitated above the water surface to float, 2 is a connecting cable hanging from the lower surface of the levitation body 1, and 3 is a connecting cable 2 It is a signal processor attached to the lower end for processing electric signals.

4 is a multi-core cable that hangs down from the lower end of the signal processor 3 and connects a plurality of signal cables in a radial direction and bundles them into a flat one. It is an underwater sensor for observing distance etc.,
A plurality of multi-core cables 4 are arranged at predetermined intervals in the axial direction and attached.

Reference numeral 6 is a weight attached to the end of the multi-core cable 4 so that the plurality of underwater sensors 5 are vertically extended.

The components 2 to 6 are stored in the levitation body 1 until they are dropped into water.

The underwater sensors 5 are electrically connected to each other by a multi-core cable 4, and the signal in the water detected by the underwater sensor 5 is transmitted via the multi-core cable 4 to the signal processor 3.
And the signal processing is performed in the signal processor 3. After that, it is sent to the levitation body 1 via the connecting cable 2, and is transmitted from the levitation body 1 to a ship or a receiving unit on the ground by a radio signal or the like.

Next, the structure of the multi-core cable 4 connecting a plurality of underwater sensors 5 at a predetermined interval will be described with reference to FIGS. 4 and 5.

FIG. 4 is a vertical cross-sectional view showing the structure of a conventional multi-core cable, and FIG. 5 is a sectional side view of the same cable taken along the line AA. As shown in these figures, each multi-core cable 4 has its own signal. Is formed by bundling a plurality of circular signal cables 4a having a circular cross-section for transmitting the signal.

This multi-core cable 4 is connected to the signal cable 4a by a connecting cord material 7 which is woven in a flat and slender string shape with a weaving yarn between a plurality of signal cables 4a arranged in parallel so as to form one row in the radial direction. In a direction orthogonal to the cord material 7 for each other,
In addition, each signal cable 4a is wrapped around the upper and lower sides of its peripheral surface and alternately woven so that the plurality of signal cables 4a are connected in the radial direction to form one flat multicore cable 4.

Reference numeral 7a denotes a fair composed of the remaining portion on the terminal end side of the connecting cord material 7 in which the plurality of signal cables 4a are woven, and when the multi-core cable 4 is installed in water, the multi-core is directed in the direction of water flow. The cable 4 is guided so that the direction of the cable 4 is always constant.

The plurality of sensors 5 described above are arranged and attached at a predetermined number of points on the way of the multi-core cable 4 formed in this way, and various information in the water, such as the water temperature and the direction of the tide, are attached by the sensor 5. And the flow velocity are observed.

Then, at the time of this observation, when the floating body 1 floating on the water is washed away by wind or blown air, the multicore cable 4
Although it is also dragged by this, the multi-core cable 4 is equipped with a fair 7a extending horizontally from one end of the multi-core cable 4, so that the function of this fair 7a keeps water resistance from the B direction at all times. I am supposed to receive it.

That is, in the state shown in FIG. 5, for example, when water flows in the direction of arrow A (right side in the figure), the fair 7a receives the resistance of the water and is flown to the signal cable 4a side, and the force of the fair 7a received at that time is received. As a result, the entire multi-core cable 4 is reversed to the left or right around the axis, and the fair 7a moves toward the end side of the multi-core cable 4 with respect to the direction in which the end (free end side) of water flows. There is. That is, the multi-core cable 4 having such a structure is always supported parallel to the water flow.

Therefore, the projected area of the resistance of water received by the multi-core cable 4 is the area in the diameter direction of almost one signal cable 4a as shown in the figure.

[Problems to be solved by the device]

However, in the structure of the conventional multi-core cable described above,
There are some problems as shown below.

First, FIG. 5 shown in the past shows the problem in the conventional example as it is. When the multicore cable with the conventional structure is used in water, the direction of the water flow in water and the resistance due to the water flow are shown. 3 shows the projected area of the multi-core cable 4 receiving the light.

Arrow B in the figure indicates the direction of water flow, and the multi-core cable 4
Flowing at an angle orthogonal to the axial direction of. As seen in this figure, the flow of water from the B direction is
Will be received at the diameter of. That is, if the diameter of the multi-core cable is made thicker, the resistance becomes larger in proportion to this.

As shown in FIG. 3, in the underwater array type sensor, the weight of the lower end weight 6 is supported by the multi-core cable 4, so that the multi-core cable 4 is thick enough to withstand the weight of the weight and has a large wire diameter. Must.

However, as described above, the resistance received by the multi-core cable due to the flow of water is received by the diameter of the cable. Therefore, if the wire diameter becomes large, the projected area (C) naturally becomes large, and as a result, the multi-core cable receives. The potency (D) increases.

Therefore, when the floating body floating on the water surface is swept away by wind or blown air, the multi-core cable is also dragged by it, and if a large resistance is applied to it, the multi-core cable will be dragged by the water resistance. Each sensor 5 attached to
However, there was a problem that the water depth became shallow against the weight and the water depth became shallow, and the water was not extended to a predetermined depth, and reliable observation results could not be obtained.

Therefore, in order to prevent it from flowing, it is sufficient to make the weight heavier, but there is a weight limit due to the thickness of the multi-core cable, and if the weight is increased, the wire diameter of the multi-core cable must also be thickened. Therefore, the problems described above cannot be solved.

Also, when storing a multi-core cable in a floating body, if the wire diameter is made thicker to support the weight of the weight, not only the storage area becomes larger, but also the bending diameter becomes larger and the storage capacity is poor. There was a problem.

Note the efficacy D is calculated by the equation _{(1/2 · P · C D ·} S · V 2).

Where P is the specific weight, C _D is the efficacy coefficient, S is the projected area, V
Is the flow velocity.

Therefore, the present invention has been made in order to solve the above-mentioned problems, and because the wire diameter of the multi-core cable is small, the floating body is caused to flow by wind or blowing air, and the sensor resistance is caused by the water resistance. It is possible to obtain reliable observation results by not lifting up from the predetermined water depth position, and at the time of storage, the bending diameter is reduced to reduce the storage area and improve the storage performance. It is an object to provide a multi-core cable for an underwater array type sensor.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention arranges a plurality of cables horizontally and flatly in the radial direction in order to arrange sensors for underwater observation at a plurality of predetermined depths in water.
The connecting cords are alternately woven vertically in the direction orthogonal to the cable and bundled in a straight line to be connected, and the end of the connecting cord is set to a predetermined length from one side of the outermost cable. In a multi-core cable for an underwater array type sensor that is extended and provided with a fair to maintain a certain direction with respect to the water flow, reinforcing by carbon fiber etc. to a thickness almost equal to the wire diameter of the cable A cable is formed, and the reinforcing cables are arranged in parallel with the plurality of cables so as to form one row in the radial direction, and are woven and bundled by the connecting cord material.

[Action]

With the configuration described above, when the floating body is swept away by wind or blown air, the multi-core cable is made to flow in water, or when the multi-core cable receives water resistance due to the flow of water, the multi-core cable becomes horizontal. Due to the function of the fair provided at one end of multiple signal cables that are flatly connected to each other, the fair always moves toward the end side of the multi-core cable in the direction of water flow and is always parallel to the water flow. Supported by.

For this reason, the projected area of water resistance received by the multi-core cable is a half-circumferential surface of one signal cable, and the water resistance decreases as the wire diameter of the signal cable decreases.

The weight having a sufficient weight for stretching the multi-core cable having the reduced wire diameter is supported by the reinforcing cable woven together with the signal cable.

Therefore, the resistance force applied to the multi-core cable due to the flow of water becomes small, and the sensor can be extended to a predetermined depth without being lifted, so that reliable observation results can be obtained.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of the multi-core cable of the present invention, and FIG. 2 is a first view.
It is an EE line expanded sectional view of the multi-core cable shown in the figure.

Although not shown, the outline of the underwater array type sensor is almost the same as that described in the related art, and therefore its description is omitted here.

In FIGS. 1 and 2, reference numeral 8 denotes a multi-core cable according to the present invention, each of which has a plurality of signal cables 4a for sending its own detection signal to a signal processor (not shown), and the signal cable 4a. It is formed by bundling the reinforcing cable 9 formed of carbon fiber or the like having the same wire diameter and a large tensile force in a straight line.

That is, multiple signal cables 4a and this signal cable
The reinforcing cables 9 having the same wire diameter as 4a are aligned in parallel so as to form one row in the radial direction, and the signal cables 4a are connected between the respective signal cables 4a and the reinforcing cables 9 by the connecting cord 7. And the cord material 7 for connection are orthogonal to each other, and each one of the signal cable 4a and the reinforcing cable 9
All the signal cables 4a and the reinforcing cables 9 are diametrically connected to each other by wrapping around each other around the upper and lower sides of the peripheral surface, and forming a flat multicore cable 8.

Note that the position of the reinforcing cable 9 at this time is arranged at one end on the side opposite to the fair 7a side in the drawing, but the position is not limited to this, and may be the center or the other end on the fair 7a side. The same effect can be obtained regardless of the position.

As a result, the tensile force of the multi-core cable 8 is reinforced and the heavier weight can be supported with the thickness of the conventional signal cable 4a.

Although not shown, a plurality of sensors for underwater observation are attached to the multi-core cable 8 having such a structure at predetermined intervals, and the sensors are attached to the levitation body via a signal processor or the like.

When the submerged array type sensor having the above-mentioned configuration is dropped in water, and is suspended from the levitation body due to the weight of the weight and hung in the water, when the levitation body floating above the water is washed away by wind or blown air flow. The multi-core cable 8 also flows according to this, but the multi-core cable 8 has a thin wire diameter so that the resistance of water can be reduced, and at the end of the multi-core cable 8, the action of the reinforcing cable 9 reduces the resistance to water. On the other hand, since a weight having a weight sufficient to hold the multi-core cable 4 vertically in water is attached, the water resistance becomes small.

For this reason, the floating body is not slanted and dragged by the movement of the floating body, and the floating body is moved in a state of being hung below the floating body, so that the plurality of sensors attached to the multi-core cable 4 become shallower than a predetermined water depth. Things will disappear.

The present invention is not limited to the above-described embodiment. For example, the number of signal cables 4a of the multi-core cable 8 is six in the drawing and the number of the reinforcing cables 9 is one, but at least one is reinforced. As long as the cable 9 is woven and the total number is at least 3 or more, any number of combinations may be used. Further, the weaving method for weaving each of the signal cables 4a and the reinforcing cables 9 with the connecting cord material 7 is not limited to the one shown in the figure, and if the weaving is performed by being flatly connected in a straight line. good.

[Effect of the Invention] As described above, according to the present invention, a plurality of signal cables and a reinforcing cable formed of carbon fiber so as to have a thickness substantially equal to this linear type are horizontally arranged in the radial direction. Align them flatly, and woven them in a vertical direction in a direction orthogonal to the cable with a connecting cord, and bundle them in a straight line to connect them, and connect the ends of the connecting cords from one side of the outermost cable to a predetermined position. It was decided to provide a fair extending to the length to maintain a certain direction to the water flow.

As a result, the weight of the weight attached to the end of the multi-core cable can be held by the reinforcing cable, so that the wire diameter of the signal cable can be reduced and the weight of the weight can be increased at the same time.

Therefore, the resistance of water to the multi-core cable is reduced due to the floating body flowing or the flow of water, and the weight of the weight allows the multi-core cable to maintain a substantially vertical state with almost no inclination. You can do it. For this reason, the sensor is not lifted up, the sensor can be extended to a predetermined installation depth, and reliable observation results can be obtained.

Furthermore, since the wire diameter of the single signal cable is small in this multi-core cable, the bending diameter is also small, so that the storage area is small and the storability can be improved.

[Brief description of drawings]

FIG. 1 is a front view of the multi-core cable of the present invention, and FIG. 2 is a first view.
EE line expanded sectional view of the multi-core cable shown in the figure, FIG. 3 is a side view showing the outline of the underwater array type sensor, FIG. 4 is a longitudinal sectional view showing the structure of a conventional multi-core cable, and FIG. The figure is a side view of the same cable taken along the line AA. 1 ... Floating body, 3 ... Signal processor 4a ... Signal cable, 5 ... Underwater sensor 6 ... Weight, 7 ... Connection string 7a ... Fair, 8 ... Multi-core cable 9 ... Reinforcement cable

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Hiroshi Takada 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. (56) Reference JP-A-2-301910 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A plurality of signal cables for transmitting an underwater observation result from a sensor mounted so as to be arranged at every predetermined depth in water to a levitating body on the water surface, are arranged horizontally and flatly in the radial direction. Aligning and interlacing with the connecting cord in a direction orthogonal to the signal cable in an up-and-down alternate manner and connecting them by bundling them in a straight line and extending the end of the connecting cord from the outermost side to a predetermined length. In a multi-core cable for an underwater array type sensor that has a fair to maintain a certain direction with respect to the water flow, it is reinforced with carbon fiber etc. to a thickness almost equal to the diameter of the signal cable. A multicore cable for an underwater array type sensor, characterized in that a cable is formed, and the reinforcing cables are arranged in parallel with the plurality of signal cables so as to form one row in a radial direction and woven and bundled by the connecting cord material. Table.