JPS58168984A - Submarine investigating device - Google Patents

Abstract

PURPOSE:To hold the fish of a side sonar at constant height, by towing the fish by an investigating machine run on the sea bottom through a specific-length towing rope. CONSTITUTION:The investigating machine 1 is towed by a tugboat through the rope 2. A buoy 10 towed in the sea is locked atop of the rope 9 unwound from a take-up drum on the investigating machine 1 and the fish 11 of the side sonar for investigating the topography of the sea bottom is coupled with the rear of the buoy 10 through a towing cable 12 to two the fish 11 by the buoy 10. The length of the rope 9 is specified on the basis of the measurement range of the side sonar. Consequently, the fish 11 is held nearly at specific height from the sea bottom surface.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for investigating the ocean floor, and more particularly to an apparatus for investigating the shape of the ocean floor using i'i ultrasonic equipment.

Conventionally, in order to investigate the seafloor topography using ultrasonic equipment for topographical survey, that is, side sonar, each time a ship carrying the side sonar is moved underwater by a tugboat (
The shape of the seafloor has been observed by towing the filas, transmitting ultrasonic waves at a predetermined angle to the seabed surface from a side sonar, and receiving the reflected waves. In order to observe the shape of the seafloor using force, it is necessary to maintain the filler of the side sonar at a constant height above the seafloor in order to keep the measurement range constant. However, in the conventional method described above, the fillet of the side sonar is towed through the sea by the tugboat via a tow rope. In order to correct this, it is necessary to constantly monitor the water depth, towing speed, etc. and adjust the length of the towing rope, which is cumbersome to operate and difficult to obtain accurate observation results. There are difficult drawbacks.

The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional technology.For this reason, the present invention uses a towboat to tow the fillet of a side sonar, and transmits ultrasonic waves from the side sonar toward the seabed surface to emit reflected waves. In a seabed survey device that receives reception t7 and investigates the shape of the seabed, the filler of the side sonar is towed by a buoy that is towed under the sea via a tether of a predetermined length from a surveying machine that is towed by a tugboat and glides on the seabed surface. It is characterized by

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

The figure is a schematic diagram showing an embodiment of the present invention. In the figure, 1 is a camphor-shaped surveying machine that is towed by a tugboat on the sea surface (not shown) via a tug 2 and slides on the seabed 6, and 4 is a A plow excavation type hardness measuring device that is installed on the surveying machine so that it can be raised and lowered and that can protrude to the seabed; 5 is an ultrasonic device for seabed geological survey mounted on the surveying machine 1, that is, a geosoner; 6 is towed by the surveying machine 11; It is a turret-shaped magnetic probe that is towed by a cable 7 and slides on the sea floor.

However, in the present invention, as shown in the figure, the investigation device 1
A buoy 10 to be towed underwater is anchored to the tip of a towing line 9 pulled out from the upper winding drum 8, and a towing cable 12 is attached to the rear of the towing buoy 10 with a side saw buoy 11 for surveying the submarine topography. The side saw buoy 11 is towed by the preceding towing buoy 10. Chasing 9
The length of 1 is maintained at a predetermined length based on the measurement range by Idonna. In this way, by towing the towing buoy 10 via the towing line 9 of a certain length from the surveying aircraft 1 sliding on the seabed, and by towing the towing buoy 11 of the side saw with the preceding towing buoy 10, the side saw The actual buoy 11 is always maintained at a substantially constant height above the seabed regardless of changes in water depth or the speed of the towboat, and therefore, as in the past, the position of the side saw buoy is adjusted every time the water depth changes. It is possible to avoid the troublesome operation of adjusting the measurement range, and to always maintain a constant measurement range to perform an accurate topographic view 6) 1j. The transmission and reception of ultrasonic waves from the side saw blade and the winding and unwinding operations of the winding drum 8 are performed from the towboat via a control case (not shown), and the height of the side saw blade from the seabed is determined by the height of the winding drum 8. By monitoring the length of the towline 9 unwound from 8, it can be monitored on the tugboat. Furthermore, processing of the received signals can be performed onboard the tugboat in a known manner.

When the towing buoy 10 and side saw buoy 11 are not in use, they can be stored in the storage cage 1 on the surveying machine 1 by winding up the towing line 9 with the winding drum 8.

The hardness measuring device 4 has a pressure sensor embedded in the front surface of the plow to measure soil pressure, and determines the hardness by measuring the soil pressure applied to the plow, and a plurality of pressure sensors may be provided above and below. It is possible to judge the hardness corresponding to the excavation depth. Furthermore, the geosoner 5 can transmit low-output ultrasonic waves from a position close to the seabed surface to perform highly accurate surveys, and can determine changes in the bottom sediment 1 to 2 meters below the seafloor. Furthermore, the above-mentioned magnetic exploration device 6 has a plurality of fluxgate type magnetic detectors 6a lined up and mounted on a rod 6b mainly made of non-metallic material. These hardness measuring devices4. :) The osonar 5 and the magnetic detector 6 can be combined with the side saw 11 to simultaneously conduct seabed geology, hardness, topography, and magnetic exploration. Additionally, by conducting the topography survey and the hardness survey simultaneously, it is possible to eliminate erroneous measurements caused by track deviations that would otherwise occur if they were conducted separately as in the past.

As described above, according to the present invention, it is possible to always maintain the side saw at a constant height above the seabed regardless of changes in water depth, and therefore the operation is simple and accurate observation results can be obtained. An investigation device is obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing one embodiment of the present invention, and FIG. 2 is a plan view thereof. 1... Investigation aircraft, 9... Towing, 10...
Towing Buoy, 11...The Ido Sonar Buoy. Patent applicant: Sumitomo Electric Industries, Ltd. Sumitomo Heavy Industries, Ltd.

Claims (1)

[Claims] In a submarine survey device that investigates the shape of the seafloor by towing the fillus of a side sonar by a tugboat, transmitting ultrasonic waves from the side sonar toward the seabed surface, and receiving reflected waves, the shape of the seabed is investigated. A submarine survey device characterized in that it is towed by a noi that is towed underwater via a towline of a predetermined length by a survey vehicle that glides on a surface.