JPH0149849B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for constructing an upwelling structure by depositing an upwelling block at a predetermined point on the seabed or under water.

[Prior art and its problems]

Conventionally, when constructing fishing reefs or upwelling structures by depositing upwelling blocks in the sea, lakes, or rivers,
The work was carried out in a coordinated manner between the work boat and the divers in the water, with the divers receiving instructions from the work boat. However, the working environment for underwater work was poor, and there were limits to the number of workers and working hours, making it impossible to carry out the work safely and efficiently. Furthermore, communication between work vessels and divers uses communication means such as underwater telephones and transponders, which are noisy and make it difficult to communicate accurately.Furthermore, these communication equipment worsen the work efficiency of divers. ing. In addition, underwater work is greatly affected by the working depth, and as the water gets deeper, it is necessary to take into account the visibility of the work and the diver's physical strength limit, which poses problems in terms of health and safety, work efficiency, and even the accuracy of upwelling block installation. It was a lot of work.

[Purpose of the invention]

The present invention solves the problems in conventional upwelling block construction, and provides a method of constructing upwelling blocks that can be accurately installed by monitoring and controlling on board a ship using radio waves and sound waves.

[Structure of the invention]

The present invention includes two radio reflectors installed at a certain distance on land near a predetermined work area, a radio range finder installed at fixed positions on the bow and stern of a work boat moored in the predetermined work area, A wave transmitter attached to the bottom of the work boat, a wave receiver suspended in the water from the work boat and arranged in an approximately equilateral triangle shape, and the top of an upwelling block holder suspended in the water from the work boat. First, the position and direction of the work boat are calculated using a radio range finder and a radio wave reflector, and then the signals transmitted from the transmitter are received by the two transponders, and the transponder receiving a response signal from the block holder using three receivers, calculating the position and orientation of the block holder relative to the work boat, and determining the underwater position and orientation of the block holder from the two calculation results, This is a method for constructing an upwelling structure, which is characterized by sequentially depositing upwelling blocks at predetermined positions on the bottom of the water.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. 1st
The figure is an explanatory diagram showing a method of constructing an upwelling flow block.

In the drawing, reference numeral 1 indicates a predetermined work area where upwelling blocks are to be sunk, and a work boat 2 is moored to this work area 1. Land area 3 near work area 1
On the side, there are radio wave reflectors 4a and
Install 4b. The work boat 2 has radio range finders 5a and 5b at fixed positions on the bow and stern, and a transmitter 6 on the bottom of the work boat 2 that transmits sound waves toward the seabed.
Three receivers 7 suspended in the sea from the work boat 2 and arranged in a substantially equilateral triangle shape to receive sound waves from the sea.
a, 7b, 7c and the crane device 8 are installed.
The upwelling block holder 9 is suspended in the sea by a wire 14 from the crane device 8 of the work boat 2, and the upwelling block 11 to be sunk is held by hooks 10 attached to the four corners of the upwelling block holder 9. ing.
Further, transponders 12a and 12b are installed at the top of the block holder 9 at a certain distance,
Receiving the signal from the transmitter 6, the receivers 7a,
A response signal is transmitted to 7b and 7c. A control device 13 installed in the work boat 2 has a radio range finder 5.
a, 5b, transmitter 6, and receivers 7a, 7b, 7c, calculate, record, and display distance and direction based on signals, and remotely control the upwelling block holder 9.

Next, a method for sinking the upwelling block 11 will be explained.

(b) Land 3 from the radio range finder 5a, 5b of the work boat 2
transmitting radio waves to radio wave reflectors 4a and 4b, and receiving the reflected signals with radio range finders 5a and 5b, respectively;
The time difference between transmission and reception and the reception direction are input to the control device 13, and the distance and direction from the radio wave reflectors 4a and 4b are calculated to confirm the direction and position of the work boat 2 in the work water area 1.

(b) Next, a sound wave signal is transmitted to the seabed from the transmitter 6 of the work boat 2, and the transponders 12a, 1 on the upwelling current block holder 9 receive this signal.
2b respectively, the response signals are received by the three receivers 7a, 7b, and 7c of the work boat 2, and the time difference between transmission and reception and the receiving direction are input to the control device 13, and the work boat The direction, position, and depth of the upwelling flow block holder 9 with respect to 2 are calculated.

(c) Based on the orientation and position of the work boat 2 calculated in (a) above and the orientation, position, and depth of the upwelling block holder 9 relative to the work boat 2 calculated in (b) above, the control device 13 performs the work. The absolute position of the upwelling block holder 9 in the ocean area 1 is calculated.

(d) If the absolute position of the upwelling block holder 9 is out of the specified position, move the mooring position of the work boat 2 or adjust the crane device 8 to move the upwelling block holder 9 to the specified position. position and repeat the above steps (a), (b), and (c) again to move to work area 1.
Check the direction, position, and depth of the upwelling flow block holder 9.

(e) Once it is confirmed that the upwelling flow block holder 9 maintains a predetermined orientation at a predetermined position, the hook 10 of the block holder 9 is removed by remote control from the control device 13, and the upwelling flow Block 1
1 in a predetermined position.

(f) The steps (a) to (e) are repeated to sequentially deposit the upwelling block 11 in a predetermined position, and the direction, position, and depth are displayed and recorded on the control device 13.

FIG. 2 is a perspective view of an upwelling structure 15 constructed on the seabed, and the installation position, direction, and depth of each upwelling block 11 are determined in advance by the control device 13.
The work boat 2 and the crane device 8 are operated to sequentially follow the stored values, and the upwelling flow blocks 11 are sequentially stacked from the bottom through the steps (a) to (f) above. , upwelling structure 15
Build.

In this way, fishing reefs, upwelling structures, etc., which are arranged linearly or stacked on the seabed, are controlled and operated on the work boat 2 to sink blocks and construct structures.

〔Effect of the invention〕

In the construction method according to the present invention, the block is sunk by using radio waves and sound waves to three-dimensionally determine the orientation and position underwater, instead of the conventional method of confirming the position and performing installation work by divers. This is a construction method that allows the block to be sunk in a predetermined position by accurately calculating the position and orientation.Also, all work is done on a work boat and does not rely on visual inspection, so regardless of the work time, It is possible to construct structures safely and efficiently.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a method for depositing an upwelling flow block, and FIG. 2 is a perspective view of the upwelling flow structure. 1...Work area, 2...Work boat, 3...Land,
4a, 4b...Radio reflector, 5a, 5b...Radio range finder, 6...Transmitter, 7a, 7b, 7c...Receiver, 8...Crane device, 9...Upwelling flow block Holder, 10... Hook, 11... Upwelling block, 12a, 12b... Transponder, 13
...control device, 14...wire, 15...upwelling structure.

Claims (1)

[Claims] 1. Two radio wave reflectors installed at a certain distance on land near the designated working area, radio range finders installed at fixed positions on the bow and stern of the work boat moored in the designated working area, and the work boats A transmitter attached to the bottom, a receiver suspended in the water from the work boat and arranged in an almost equilateral triangle, and two fixed points at the top of the upwelling block holder suspended in the water from the work boat. First, the position and direction of the work boat are calculated using a radio range finder and a radio reflector, and then the signal transmitted from the transmitter is received by two transponders, and the transponder responds. The signal is received by three receivers to calculate the position and orientation of the block holder relative to the work boat, and from the above two calculation results, the underwater position and orientation of the block holder are determined. A method for constructing an upwelling structure, characterized by sequentially depositing blocks at predetermined positions on the bottom of the water.