JPS6022753B2 - Device for detecting objects on and below the seafloor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus that can detect the presence or absence of objects existing on and below the seabed surface during ocean development, etc., and can also efficiently explore the size and material of the objects.

There have been many devices of this type that only detect the presence or absence of an object, but there are almost no practical techniques for efficiently detecting the size and material of an object. The current situation is that it only detects size and is far from accurate detection. In addition, divers equipped with individual sensors crawled into the sea and explored the seabed while moving around, but this had the drawback of being extremely inefficient.

Furthermore, there was a problem in that it was impossible to perform diving operations at deep depths or in areas with fast currents. In order to solve the above-mentioned problems, the present invention has made it possible to efficiently search for objects on a ship using magnetic information and sound wave information below and on the seabed surface, without having to perform underwater diving operations. The present invention will be described in detail below. Figure 1 is a front view of A and B of an embodiment of the present invention.
FIG.

In the figure, a pedestal 2 made of a non-magnetic material is lowered onto the seabed 1 using a ship's crane (not shown) or the like. Magnetic sensors 3-1 to 3-n are provided on a predetermined surface of the pedestal 2, that is, the upper surface.
A shore moving body 4 in which a large number of
It is possible to move to. Further, on the top surface of the pedestal 2, a sonic wave transducer 5 having directivity is provided on a sliding body 6, and the sonic wave transducer 5 is movable in two mutually orthogonal directions on the top surface of the pedestal 2. .

Note that 7 is a magnetic object buried in the seabed 1, and 8 is a non-magnetic object.

Furthermore, the explanation of the mechanism for driving the sliding bodies 4 and 6 and the cables for the power supply and the like is omitted. Next, to explain the operation, when the pedestal 2 that has landed on the seabed 1 moves in one direction and the sonic wave transducer 5 moves in two directions, the magnetic sensors 3-1... 3-n and the output of the sound wave transducer 5 can be extracted.

Although not shown, position information of the magnetic sensors 3-1...3-n and the acoustic wave transducer 5 can also be obtained. In FIG. 2, 9 is a magnetic signal amplifier, 10 is a display/recorder such as a CRT, and 11 is a position signal oscillator for the magnetic sensors 3-1, . . . , 3-n, which detects position information.

12 is a transceiver for transmitting and receiving acoustic pulse waves.

13 is a control circuit that controls synchronization of the transmitter/receiver 12 and the like. 14 is a storage device for storing output information from the transmitter/receiver 12, and uses what is generally called a scan converter.

Reference numeral 15 denotes a display/recorder such as a CRT, which displays the information stored in the memory 14 in gradations.

16 is a position signal oscillator of the sound wave transceiver 5.

FIG. 3 shows a display example of the display/recorder 10, 17-1...
-17-n indicates a display line.

In addition, the display of the magnetic sensors 3-1...31n is indicated by the display line 17-1.
...171M. Therefore, it is recognized that a magnetic object exists in the center of the display lines 17-17, 17-18, and 17-19, and that there is no magnetic object in the other parts.

FIG. 4 shows an example of the display on the display/recorder 15.
Display line 18 shows the reflected signal from the seabed surface, display line 19
, a display line 20 indicates a reflected signal from the object.

This reflected signal is a physical constant of the ocean floor (almost constant).
This is caused by the difference in the values. Comparing FIG. 4 and FIG. 3, it is in the center that signals are emitted in both the magnetic and sonic recordings, and only the sonic signals are present in the stone parts.

Therefore, it is recognized that the display line 19 is a magnetic object and the display line 20 is a non-magnetic object. In addition to determining whether the object is magnetic or non-magnetic, it is also possible to recognize the material of the buried object based on the amount of magnetism. The above is the basic principle of the present invention, and to describe it in more detail, first, the pedestal is placed on the seabed to be explored, the sliding body 4 is moved, and the magnetic sensors 3-1...3-n are used to detect various layers of the seabed. The amount of magnetism is continuously measured, amplified by a magnetic signal amplifier 9, and displayed on a display recorder 10.
Record one display.

However, the position information of the sliding body 4 can be obtained by using a position signal oscillator 11 (for example, a plate with slits cut at regular intervals is provided on the pedestal, light is emitted onto the plate, and an intermittent light signal is generated each time the sliding body 4 moves). (which can be used as a position signal). The display obtained in this manner makes it clear the location and material of the object.

Next, we will check using sound waves.

First, the sliding table 6 is moved to project a transmission pulse generated by the transceiver 12 as a sound wave by the sonic wave transducer 5. Then, the reflected waves reflected from the seabed are received by the acoustic transducer 5, amplified by the transceiver 12, and then stored in the memory 14. The position signal at this time is a signal generated by a position signal oscillator 16 (similar to the position signal oscillator 11 described above) and controls the memory 14. The output signal of the memory 14 is displayed on the display/recorder 15. By comparing the display based on the magnetic information obtained in this manner and the display based on the acoustic wave information, the location, material, and size of the object can be confirmed.

As explained above, the present invention is an excellent invention that has particularly remarkable effects when used for searching for buried objects in sea areas such as ports and harbors.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the present invention, A is a front view, B is a top view, Fig. 2 is a block diagram showing an electric circuit used in Fig. 1,
FIG. 3 is a diagram showing a display based on magnetic information, and FIG. 4 is a diagram showing a display based on sonic information. 1. ．． ．． ．． ．． ．． Undersea, 2... Frame, 3-1-3
-n... ...Magnetic sensor, 4,6...Sliding table, 5...Sound wave transducer, 10,15...
...Display recorder. Figure 1 Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A magnetic sensor movable on a predetermined surface of a pedestal made of a non-magnetic material that is placed on the bottom of the seabed, a sonic wave transducer that is movable on the predetermined surface and has directivity, and the predetermined magnetic sensor On the seabed surface and on the seabed, characterized in that it is equipped with a display recorder that displays magnetic information at each position on the surface, and a display recorder that displays the sonic information at each position on the predetermined surface of the sound wave transducer. Subsurface object detection device.