JPS5848567Y2 - Underwater position marking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an underwater position marking device for placing a marker near a desired position on the bottom of the water.

When collecting underwater information while towing a towed vehicle equipped with observation equipment by a ship, it may be necessary to accurately determine the location where unique information has been obtained.

However, it is generally difficult to measure the position of a vessel during navigation with high precision in a short period of time, and it is impossible to stop the vessel immediately, and if the vessel speed is suddenly reduced, the tow line may be long. There is a risk that the towed vehicle may collide with the seabed and be damaged.

Therefore, it was extremely difficult to reach the above location again.

In addition, in addition to underwater television cameras and audio equipment, methods such as physical exploration and chemical exploration are used to explore resources on the seabed, search for sunken ships, and search for lost observation equipment.
Even if it were possible to find it by these means, it would be more difficult and time consuming for a worker such as a work boat or a diver to reach it.

The present invention was developed under the above circumstances, and its purpose is to be able to accurately grasp the desired position,
Therefore, it is an object of the present invention to provide an underwater position marking device that can be reached in a short time.

Hereinafter, the present invention will be described with reference to an illustrated embodiment.

In FIG. 1, a marker main body 1 includes a first member 2 and a second member 3 that are detachably connected to each other.

The first member 2 is airtightly closed at the right end in the figure, and includes a weight 4 provided at the right end and a hollow section 5 opening at the left end, and this hollow section 5 is filled with water. The structure is such that the weight in water at is positive (it sinks in water).

The second member 3 includes a signal transmitting section 6 and a control section 7 (the inside of each of which is not shown).

The signal transmitting unit 6 includes at least one of an ultrasonic transmitter that can be linked with an acoustic exploration device provided on the ship, and a light emitting device (for example, a flash type) for an underwater television camera, a diver, or the like.

The control section 7 includes a control circuit, a power supply section, etc. for the signal transmitting section 6, and the signal transmitting section 6 when immersed in water.
Switch means are provided for activating the.

This switch means may be, for example, a seawater switch or the like, or when a seawater battery is used as the power source, it may be one that directs seawater to the battery.

The second member 3 is configured such that its total underwater weight is negative.

The first member 2 and the second member 3 are connected to each other via a cable 8 of a desired length, and in the initial state, the hollow part 5 accommodates the cable 8 and is filled with air. In this state, it is airtightly closed by the second member 3, and its weight underwater is approximately O.

The towing body 10 (only a part of which is shown) to which the marker main body 1 is attached includes a support fitting 11 that removably supports the main body 1 and an actuating member 12 that drives the support fitting 11, as illustrated in FIG. etc., and by releasing the support fitting 11 via the actuating member 12 by a control signal transmitted via the towing cable or water, the main body 1
It is constructed so that it can emit.

While the main body 1 is supported by the towing body 10, it is maintained in the initial state, and when it is released from the towing body 10 as described above, the first member 2 and the second member 3 are separated from each other. As a result, the hollow portion 5 is opened and water flows into the hollow portion 5, and the control portion 7 and the signal transmitting portion 6 start operating.

Further, when the first member 2 and the second member 3 are separated and water flows into the hollow portion 5, the total underwater weight of the main body 1 becomes positive, but the main body 1 sinks into the water.

Then, as shown in FIG. 2, when the first member 2 reaches the bottom of the water, the second member 3 has a negative underwater weight, so it has floated to a height regulated by the cable 8, and the signal transmitter 6 is transmitting a predetermined signal.

According to the above configuration, when the main body 1 is supported by the towing body 10, the hollow portion 5 is filled with air and is in a sealed state, so the total underwater weight of the main body 1 is approximately O.

Therefore, even if the main body 1 is released, the center of gravity of the towed body 10 will not change, and there will be no adverse effect on the towing attitude, towing depth, etc., resulting in excellent stability and highly reliable observation data. can be obtained.

Further, after the main body 1 is released into the water, the first member 2 and the second member
Since it is separated from member 3 and the total weight in water becomes positive, it sinks quickly.

Therefore, it is less affected by the vessel's navigation speed, water current, etc., and can sink to a position sufficiently close to the desired water bottom position.

Moreover, since the second member 3 is connected to the first member 2 via the cable 8, even if the first member 2 is buried in a groove on the bottom of the water, in sludge, etc., or is surrounded by a group of organisms. The second member 3 can be positioned above these.

Therefore, since the transmitted signal is not blocked, subsequent search is easy.

As described above, the present invention includes a first member having a weight and an open hollow part and having a positive underwater weight, and a first member which is removably connected to the first member so as to freely open and close the hollow part and to transmit a signal. a second member having a negative underwater weight;
and a cable connecting the second member to each other, the total underwater weight is approximately equal to 0 when the hollow part is in a closed state filled with air, and the hollow part is in an open state where the air is released. It is characterized in that the internal volume of the hollow portion is set so as to be positive at the same time.

Therefore, there is no adverse effect on the towing body when it is released, and since it quickly sinks after being released, it can be positioned sufficiently close to the desired position, and it can send signals well regardless of the bottom state. Therefore, the desired position can be accurately grasped and the desired position can be reached in a short time.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view showing one embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the operating state of the same side. DESCRIPTION OF SYMBOLS 1... Marker main body, 2... First member, 3... Second member, 4... Weight, 5...
...Hollow part, 6...Signal transmitting part, 7...
...Control unit, 8...Cable, 10...
・Towing body, 11...Supporting metal fittings, 12...
・Operating parts.

Claims (1)

[Scope of utility model registration request] A first member having a weight and an open hollow part and having a positive underwater weight, and a first member which is detachably connected to the first member and which closes the hollow part so as to be openable and closable, and has a signal transmitting part and has a positive underwater weight. a negative second member, and a cable connecting the first and second members to each other, the total underwater weight being equal to zero when the hollow portion is in a sealed state filled with air; An underwater position marking device characterized in that the internal volume of the hollow portion is set so as to be positive when the air is released into an open state.