JPS593374A - Seabottom magnetometer - Google Patents

Abstract

PURPOSE:To enable self-floating after measurement and to make measurement in deep sea easy, by placing an instrument capsule contg. a magnetic sensor, etc. freely attachably and detachably in a frame, fixing the same with fastening means and providing a floating body and a disconnecting means to the capsule. CONSTITUTION:An assembled magnetometer 1 is sunk and installed on a sea bottom 2, and various changes in magnetism are detected and measured with the instruments in a capsule 7. When an ultrasonic signal is transmitted from a ship upon ending of the measurement, a transducer 9 receives the signal, and after the signal is subjected to decoding, etc. with a transponder 12, a fastening pawl 10a makes releasing action. Then, a detaining piece 6b is disengaged from a disconnecting means 10, and a fixing band 6a suspends downward, thus making a magnetometer body 4 free. Said body is detached from a frame 3 by the buoyancy of a floating body 8 and floats by itself. When the body floats on the sea surface, a transmission means 11 emits intermittent light to announce the floating. The need for any rope for recovering is thus eliminated and the measurement is made possible in deep sea as well.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a submarine magnetometer that detects various magnetic changes on the ocean floor.

Conventionally, as shown in Fig. 1, a submarine magnetometer A is integrally formed with a control section containing a power supply, an electronic circuit, a recording device, etc., and a detection section C containing a magnetic sensor. This magnetometer a is installed submerged in the ocean floor d to detect and measure magnetic changes.

This magnetometer a is designed to be recovered after the measurement is completed, and a recovery rope (ji) is connected to the rope e, and a weight f and two large and small buoys g, g'i are attached to a predetermined rope. When the measurement is completed, 1
A recovery ship searches for magnetometer a, targeting buoy g, and retrieves it by reeling in rope e.

However, if the seabed d is not very deep, the magnetometer a can be installed and retrieved without any problem, but in deep sea, the rope e becomes long and the magnetometer a becomes difficult to install. It is not easy to install and retrieve.
There were cases where magnetic measurements could not be performed.

! However, during installation and recovery, it was necessary to feed out and wind up the rope e, making handling extremely complicated.

This invention was made in view of this point.

An instrument capsule containing a magnetic sensor, etc. is removably fixed to a pedestal using lashing means, and after magnetic force measurement, the capsule is separated from the pedestal and self-levitating to the sea surface using a buoyant body, making it possible to perform magnetic measurements even in deep sea. The purpose of the present invention is to provide a submarine magnetometer that can be easily installed and retrieved.

The present invention will be described in detail below based on embodiments shown in two drawings.

As shown in Figure 2, numeral 1 is a submarine magnetometer, which is installed submerged in the seabed 2 and detects various magnetic changes.The magnetometer body 4 is removably placed on a mount B. It is composed of

This pedestal 6 has support legs 3b connected to a mounting table 6a, a weight 5 at the bottom of the support legs 2b, and means 6 for securing the magnetometer main body 4 to the mounting table 3a. This weight @5 is used to adjust the descending speed in the sea and maintain balance, and is composed of a plurality of predetermined units of blocks removably attached to the support leg 3b.

In the securing means 6, the base end of the securing band 6a is connected to the mounting table 3a.
It is attached to the side of the magnetometer and has a locking piece 6b connected to its tip, and the locking piece 6b engages and separates from the magnetometer main body 4 to fix the main body 4 to the mount 5. ing.

mJ sensing magnetometer body 4. Buoyant body 8 on instrument cover/I/7
etc. are installed in one piece, and this cover/L'
7 is formed into a spherical shape, and a 6-axis magnetic sensor, a power source, an electronic circuit, a recording device (bubble cassette memory), etc. are housed inside. The buoyant body 8 is.

It is equipped with buoyancy to make the magnetometer main body 4 levitate.

Cover the cover/l/7 by covering the upper half of this cover/
It is integrally fixed to I/7. Further, the 9 capsule/I/7 is inserted into the mounting table 3a from above, and the buoyant body 8 is seated on the mounting table 3a.

The buoyant body 8 also has a transducer 9. While the capsule separating means 10 and the transmitting means 11 are attached, a transponder 12 is attached via a support piece 13 to the lower part of the capsule lv7. The transducer 9 receives ultrasonic signals from the mother ship, and the transponder 12 decodes the ultrasonic signals received by the transducer 9 and issues commands such as sending a response signal and activating the separating means 10. It is supposed to be done.

The separating means 10 includes a lashing die 10a.

The locking piece 6b is engaged with this securing mold IDa, so that the magnetometer main body 4 is fixed to the mount B. Further, the fastening type IDa releases its engagement with the locking piece 6b in response to a signal from the transponder 12.

The magnetometer main body 4 is configured to be separated from the mount.

The transmitting means 11 is configured to emit light intermittently when the magnetometer main body 4 floats on the sea, so as to notify the ship 1 recovery ship that it has surfaced.

Next, the installation and operation of this submarine magnetometer 1 will be explained.

First, before installation, place the capsule 7 on the mounting table 3a.
is inserted to seat the buoyancy body 8 on the mounting table 3a, and then the magnetometer main body 4 is mounted and fixed on the pedestal 3 by engaging the hooking piece 6b with the securing mold 10a.

This assembled magnetometer 1 is sunk and installed on the seabed 2,
Detect and measure various magnetic changes using the instruments inside the V7.

When this measurement is completed, an ultrasonic signal is transmitted from the ship in order to recover the magnetometer main body 4. The transducer 9 receives this ultrasonic signal, the transponder 12 decodes it, etc., and the securing mold 10a performs a release operation. When this release operation is performed, as shown in FIG.
The locking piece 6b comes off from the separating means 10, and the fixing band 61)
hangs downward, and the magnetometer body 4 becomes free. and,
Due to the buoyant force of the buoyant body 8, the magnetometer main body 4 floats by itself υ away from the mount 3, and floats on the sea surface.

The transmitting means 11 emits light intermittently to notify the user of floating.

Thereafter, a recovery ship recovers only the magnetometer main body 4, aiming at this light emission.

In this embodiment, the separating means 1o releases the lashing by an ultrasonic signal from the mother ship, etc., but the releasing operation may be performed using a timer or the like, and the lashing type 10a The invention is not limited to the examples.

Further, the second transmitting means 11 may be completely equipped with a radio beacon and the like.

Yet again. Frame 3. Of course, the capsule 7 and the buoyancy body 8 are not limited to the shapes of the embodiments.

According to the submarine magnetometer of this invention as shown in 2.

An instrument capsule containing a magnetic sensor, etc. is removably placed on a pedestal and fixed by a lashing means.

This capsule is provided with a buoyancy body and a cutting means, and after magnetic measurement, the lashing of the lashing means is released by the cutting means.

Since the capsule uses the buoyancy of the buoyant body to levitate by itself, there is no need for a recovery rope as in the past, and measurements can be taken even in deep sea.

Furthermore, since it is not necessary to feed out and wind up the rope once, installation and recovery operations can be easily performed.

[Brief explanation of the drawing]

Figure 1 is a schematic side view showing how a conventional submarine magnetometer is used, Figure 2 is a side view of the submarine magnetometer of the present invention, and Figure 5 is α
'' is the same side view showing two states. 1: submarine magnetometer, 2: ocean floor, 3 = mount. Otsua: Mounting table, 6b: Support legs, 4: Magnetometer body,
5: Weight, 6: Lashing means. 6a: Fixing band, 6b: Latching piece, 7: Capsule, 8: Buoyant body, 9: Transducer, 10: Cutting means, 10a: Tethering claw. 11: Transmission means, 12: I-Ranspon. 16: Support piece. Special r “Applicant: Shimadzu Corporation Agent
Patent Attorney Shigenobu Nakamura

Claims (1)

[Claims] (1) An instrument capsule containing a magnetic sensor, a power source, an electronic circuit, a recording device, etc. is removably placed on a pedestal, and a securing means is provided for fixing the capsule to the pedestal. The μ is equipped with a buoyancy body, a release means for releasing the lashing of the lashing means, and a transmitting means for emitting a signal of completion of surfacing on the sea surface. A submarine magnetometer characterized in that the means releases the binding between the capsule and the pedestal, and the capsule floats to the sea surface by a buoyant body.