JPS60139033A - Submarine repeater with displacement sensor - Google Patents

Abstract

PURPOSE:To attain the communication to a ground station by providing sensors for X, Y and Z axes and detecting the change of the installing position of a repeater. CONSTITUTION:A submarine repeater REP is provided with a displacement sensor SENSORx for X direction, SENSORy for Y direction and SENSORz for Z direction respectively. At the same time, current detecting circuits DETx, y and z are provided to deliver detection signals when the output of each sensor exceeds a prescribed level. The detection signals given from these detecting circuits are supplied to a modulator MOD via an OR gate G. Thus the natural frequency given from natural signal generator OSC is modulated and transmitted to a ground station via a submarine cable. Thus it is possible to detect the displacement of the installing position of the repeater REP and to have communication to the ground station.

Description

Detailed Description of the Invention (a) 1 Technical Field of the Invention The present invention relates to a communication system using submarine cables, and in particular detects displacement of the installation position of a submarine repeater and notifies the ground station. This relates to a submarine repeater with a displacement sensor.

Conventional technology and problems In conventional submarine relay systems, the problem is that submarine cables are displaced by ships' anchors, fishing operations, etc., and in extreme cases, they are severed.

However, according to the prior art, there was no method for detecting such displacement of the installation position of the repeater.

(C)0Object of the invention The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art,
An object of the present invention is to provide a submarine repeater with a displacement sensor capable of detecting the presence or absence of a change in the installation position of the submarine repeater and communicating with a ground station.

(d) 0 Structure of the Invention According to the present invention, the above object is to provide a submarine cable communication system in which each submarine repeater has X-axis, Y-axis, and Z-axis displacement sensors, and outputs of the displacement sensors. A detection circuit that detects that the output signal exceeds a predetermined value and generates an output signal, and a gate circuit that violates the logical sum of the output and output signals are provided. This is achieved by providing a submarine repeater with a displacement sensor that is characterized by reporting to a station.

(e) 0 Embodiment of the Invention In a submarine cable communication system, there is a seismic needle installed on the seabed.
Detects the components in the axis and Z-axis directions (which naturally become AC signals), and communicates them to the ground station by appropriately modulating the fluctuation components in these three axis directions, and the ground station receives these signals. An attempt was made to understand the status of crustal deformation.

The present invention uses the sensor part of this seismic needle as a displacement sensor for the installation position of a submarine repeater, and by installing this sensor on each submarine repeater that constitutes a submarine cable communication system, the installation position of each submarine repeater can be easily adjusted. This is to detect the presence or absence of positional displacement and report it to the ground station.

The figure is a block diagram showing an embodiment of a submarine repeater according to the present invention. .

In the figure, REP is a submarine repeater, 5ENSORx is a displacement sensor in the X direction, 5ENsORy is a displacement sensor in the Y direction, 5
ENSORz is a two-direction displacement sensor, DETx is an X-direction displacement sensor 5ENiORX output current detection circuit, DE
Ty is the output current detection circuit of the displacement sensor 5ENSORy in the Y direction, and DETz is the displacement sensor 5ENSORz in the Z direction.
, G is an OR gate, MOD is a modulator, OSC is a unique signal generator, PSF is a power separation/coupling filter, AMP is an amplifier, and CABLE is a submarine cable.

The present invention will be described in detail below with reference to the drawings.

The illustrated power separation and combination filter PSF is a filter that separates or combines the DC power component and signal component sent from the ground station side, and the amplifier AMP is a relay amplifier for the signal component.

The displacement sensors in the figure are the same as seismometers used in submarine cable communication systems, and include a displacement sensor in the X direction 5ENSORx and a displacement sensor in the Y direction 5ENSO.
'R)', and two-direction displacement sensors 5ENS and ORz.

The displacement sensors in each direction are composed of a combination of a magnet fixedly attached to the submarine repeater body and a coil that is easily displaced by an external force applied to the submarine repeater body.

For example, when an external force in the X direction is applied to the main body of the submarine repeater, the coil built in the displacement sensor 5ENSOR in the X direction moves to the magnet, and as a result, an electromotive force is generated in the coil. Current flows. This current flows into the output current detection circuit DEW, ,x,5*. The output current detection circuit DETx, which turns on when this current exceeds a predetermined value, is like this 6.
It detects this and outputs a signal indicating that there is a deviation in the number of rolls. :, ,
,, 414It operates in the same way regarding the Y-axis and Z-axis.2;ip
.

Output current detection circuit DETx, output type, the output signal of which is applied to the modulator MOD, 16
I sent it out over 30 degrees, and at the land station I took it to 5. ,,Auditor,1. . was. , 1:, In the present invention, this natural frequency is used, and is modulated in an appropriate format by the modulator MOD and transmitted to the ground station.

(f) 1. Effects of the Invention As explained in detail above, according to the present invention, it is possible to easily detect whether or not there is a change in the installation status of each submarine repeater at the ground station, and therefore disconnect the submarine cable. This has the great effect of making it possible to take measures in advance, and detecting changes in the installation position of the repeater due to abnormal tension being applied to the submarine cable.

[Brief explanation of drawings]

The figure is a block diagram showing an embodiment of a submarine repeater according to the present invention. In the figure, REP is a submarine repeater, S E N S q,,R
x is a displacement sensor in the X direction, 5ENSORy is a displacement sensor in the Y direction (I sensor, S ENS'ORz is a displacement sensor in the Z direction,) DETx is a displacement sensor in the X direction SE, N, S,
The output current detection circuit of ORX, D and ETy are the output of the displacement sensor 5ENSORy in the Y direction, the current detection circuit, and DET.
z is the displacement sensor SE in the Z direction, the output current detection circuit of N5ORz, G is the OR gate, MOD is the modulator, OSC is the specific signal generator, PSF is the power separation and coupling filter, AMP is the amplifier, and CABLE is the submarine cable. .

Claims (1)

[Claims] In a submarine cable communication system, each submarine repeater has
displacement sensors for the axis, Y axis, and Z axis, a detection circuit that detects that the output of each of the displacement sensors exceeds a predetermined value and generates an output signal, and a gate circuit that takes the logical sum of the output signals. A submarine repeater with a displacement sensor, characterized in that a signal specific to the repeater is provided to a ground station by the output of the gate circuit.