JPH04174392A - Submerged magnetic exploration device - Google Patents

Abstract

PURPOSE:To conduct exact magnetism exploration as well as to obtain a highly workable submerged magnetism exploration device by connecting a magnetism sensor to the device and making the magnetism sensor move to and fro along a guide rail thereof. CONSTITUTION:An end tip 19a of cantilever guide rail 18 of which rotating center is a supporting table 11 placed on a sea bed or so, is supported at a fixed point, and, when a motor 30 is actuated, a rope 29 rotatingly moves to a certain single direction. Accompanying with this movement, a magnetism sensor 20 detects an amount of magnetism along with moving from a base end 19 side to an end tip 19A side of the guide rail, and also the amount is recorded to a recorder 39 via a proton magnetic meter 38 as well as signals of encoders 6 and 22, and of a direction indicator 34. When the sensor 20 moves toward the end tip 19A side, this movement is detected by an access switch 25 to rotate the motor 30 reversely. Then, the rope 29 rotatingly moves by the motor 30, too, reversely, and the sensor 20 moves to the base end 19 side from the end tip 19A side to detect the magnetism and records to the recorder 39. In this way, the amount of magnetism is detected along the rail 18 and by making the supporting table to be the rotating center of measurement.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a submersible magnetic exploration device for exploring buried objects such as mines buried in the seabed, riverbed, lakebed, etc.

[Prior Art] Conventionally, as shown in Fig. 7, in this type of diver A is placed at the center of a circle with a radius at a predetermined location, and diver B is placed on the circumference. These divers A and B move the magnetic sensor 3 in the radial direction via the lobe 2 along the guide loaf 1 to perform magnetic exploration, and observe magnetic waveforms on board a ship to grasp magnetic anomalies. If there is no abnormality, the diver B moves along the circumference and moves the magnetic sensor 3 in the radial direction again to repeatedly perform magnetic exploration.

[Problems to be Solved by the Invention] In the prior art, the magnetic sensor 3 is connected to divers A and B.
Since the magnetic sensor 3 was moved manually in the radial direction, the moving speed of the magnetic sensor 3 could not be made constant, and there were problems in that errors were likely to occur and work efficiency was low.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and provide a diving magnetic exploration equipment that can perform magnetic exploration accurately and has excellent workability.

[Means for Solving the Problems] The present invention provides a support pedestal installed on the seabed, a river bed, etc., a guide rail installed horizontally with its tip rotatably connected to the support pedestal, and a guide rail attached to the guide rail. A slidable magnetic sensor,
The vehicle is equipped with a traveling drive device connected to the magnetic sensor and reciprocating the magnetic sensor along the guide rail.

[Function] The traveling drive device moves the magnetic sensor in the radial direction along the guide rail, allowing accurate magnetic exploration.

[Embodiment] Next, a first embodiment of the invention will be described with reference to FIGS. 1 to 5.

Reference numeral 11 denotes a support frame made of FRP or the like and installed in the seabed Z, rivers, etc. A position fixing stake 12 is integrally provided at the bottom of this support frame 11, and a pivot 13 is rotatably provided at the top. The lower end side of this support shaft 13 is inserted into the support pedestal 11 and is connected to the bearing 1 through the rotating body 14.
5, etc., so as to be horizontally rotatable, and a rotary encoder 16 for detecting the rotation angle is provided on the lower end side. Further, the support shaft 13 is pivotally attached to a rotating body 14 so as to be swingable. Furthermore, a lifting ring 17 is provided at the upper end of the support shaft 13. Reference numeral 18 denotes a guide rail installed horizontally on the upper end of the support shaft 13 by means of a hinge or the like so as to be rotatable in a vertical plane. It is constructed by connecting a plurality of elongated members made of a material with excellent corrosion resistance, and can be made compact when stored. 20 is a magnetic sensor that can reciprocate along the guide rail 18, and this magnetic sensor 20
is the Overhauser effect, that is, when a microwave electromagnetic field at the electron spin resonance frequency is applied to a substance placed in an electromagnetic field whose nucleus has spin 1/2 and one unpaired electron, the electron spin changes. , a proton magnetometer or an optical pumping magnetometer that utilizes the effect of nuclear magnetic resonance, in which the nuclear magnetic polarization that occurs as a result of nuclear spin interaction becomes abnormally large, and one nucleus appears to have a large magnetic moment. A pair of left and right mounting plates 21 are provided on the upper surface of this magnetic sensor 20 so as to sandwich the guide rail 18, and the inner surfaces of these mounting plates 21 are equipped with a magnetometer capable of measuring total magnetic force values such as A slidable roller 22 is pivotally attached to the side surface of the guide rail 18, and the mounting plate 21
A sliding suspension roller 23 is pivotally attached to the upper surface of the guide rail 18 between the upper portions of the guide rail 18 . Furthermore, the one mounting plate 21
Proximity switches 24 and 25 serving as sensors for detecting the proximal and distal positions are provided on both sides of the proximal end and distal end positions. 26 is a traveling drive device that reciprocates the magnetic sensor 20 along the guide rail 18;
A row 129 or a belt is wound between the drive pulley 27 provided on the side and the vertical pulley 28 provided at the tip 19A of the guide rail 18, and a part of the row 129 is fixed to the mounting plate 21, Further, a hydraulic or pneumatic motor 30 is connected to the driving pulley 27 so that the magnetic sensor 20 can be moved as the row 129 moves. 31 is a tension adjustment device for the row 129 connected to the vertical pulley 28; 32 is a guide roller;
3 is an encoder for detecting a moving length that is linked to the motor 30; 34 is a compass; the drive pulley 27, motor 3G, and rotary encoder 33 are housed in a machine frame 35. Reference numeral 36 denotes an electric cable, and the electric cable 36 is suspended from a plurality of hanging fittings 37 slidably provided on the guide rail 18. 38. 39 is a proton magnetometer and its recorder connected to the magnetic sensor 20 via an electric cable 36, and this
0 or installed on land.

Next, the operation of the above structure will be explained.

When a diver C supports the tip 19A of a cantilevered guide rail 18 at a fixed point, with the support frame 11 installed on the seabed as the center of rotation, and when the motor 22 is actuated, the drive pulley 2
7, the row 129 rotates in one direction, and with this rotation, the magnetic sensor 20 moves from the proximal end 19 side to the distal end 19A side, detecting the amount of magnetism, and detecting this through the proton magnetometer 38. The signal is recorded on the recorder 39 along with the signals from the encoder 16, 22 and the compass 34. When the magnetic sensor 20 moves toward the tip 19A, the proximity switch 25 detects this and either temporarily stops the motor 30 and then reverses the motor 30, or immediately reverses the motor 30.

At this time, the diver C moves along the circumferential direction, and the row 129 is rotated in the opposite direction by the motor 30 again, and the magnetic sensor 20 moves from the distal end 19A side to the proximal end 19 side. Magnetism is detected and recorded on the recorder 39. In this way, the magnetic sensor 20 is reciprocated along the guide rail 18 to detect the amount of magnetism with the support frame 11 as the center of rotation. FIG. 5 is a magnetic contour diagram recorded by rotating the guide rail 18 through 360 degrees.

As described above, in the embodiment, the tip 19 of the guide rail 18 is rotatably connected to the support frame 11, and the magnetic sensor 20 is provided so as to be freely movable along the guide rail 18. By providing a travel drive device 26 that reciprocates along the guide rail 18, the guide rail 18 can be provided in a cantilevered manner, allowing the diver C to work alone. 20 can travel automatically by the travel drive device 26 and can perform stable magnetic operation.

In the second embodiment shown in FIG. 6, a weight 41 made of lead or the like is fixed to the bottom of the support frame 11.
A floating body 42 such as a hollow FRP pipe that generates buoyancy is mounted on the upper part of the guide rail 18 that is rotatably provided on the guide rail 18.
will be permanently installed. In addition, a spherical floating body 4 is attached to the electric cable 36.
3 is connected.

In this way, by providing the floating body 42 on the guide rail 18, the burden on the diver C can be reduced and work efficiency can be improved.

It should be noted that the present invention is not limited to the above-mentioned embodiments. For example, a plurality of cantilever-shaped guide rails may be provided on a support frame, magnetic sensors may be provided on these guide rails, and rollers may be mounted for each magnetic sensor. Various modifications are possible, such as a self-propelled type driven by a motor integrated with the magnetic sensor.

[Effects of the Invention] The present invention comprises a support pedestal installed on the seabed, a riverbed, etc., a guide rail installed horizontally with its tip rotatably connected to the support pedestal, and a guide rail slidably attached to the guide rail. magnetic sensor;
It is equipped with a traveling drive device connected to the magnetic sensor and reciprocating the magnetic sensor along the guide rail, thereby improving workability and making it possible to perform stable magnetic exploration.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, FIG. 1 is a front view, FIG. 2 is an explanatory diagram of the state of use, and FIG. 3 is a cross section taken along the line ■-■ of FIG. 1. 4 is a sectional view of the main part, FIG. 5 is a magnetic contour diagram, FIG. 6 is a front view showing a second embodiment of the present invention, and FIG. 7 is a front view of a conventional example. 11...Support frame 18...Guide rail 18A...Support rod 20...Magnetic sensor 26...Traveling drive device patent Applicant: Ministry of Transport Director-General, Port Construction Bureau
Japan Physical Investigation Co., Ltd.

Claims (1)

[Claims] A support pedestal installed on the seabed, a river bed, etc., a guide rail installed horizontally with its tip rotatably connected to the support pedestal, and a magnetic sensor slidable on the guide rail. , and a traveling drive device connected to the magnetic sensor and reciprocating the magnetic sensor along a guide rail.