KR0167442B1 - Towed array sonar system with vibration isolation module - Google Patents

Abstract

The present invention provides a cylindrical tube body, a connector assembly fitted to both ends of the cylindrical tube body to connect with other adjacent modules and cables, both ends are joined to the connector assembly and surrounded by the cylindrical tube body and filled with a filling oil. It relates to a towing type sonar detection apparatus having a vibration isolation module that is composed of.

Description

Towing Sonar Detection System with Vibration Isolation Module

1 is a view schematically showing the state of use of the sonar embodying the present invention.

2 is a view schematically showing the state of use of the underwater acoustics countermeasure in which the present invention is embodied.

3 is a schematic sectional view illustrating a vibration damping unit of the vibration isolation module according to the first embodiment of the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

5 is a schematic front view showing a vibration damping unit of the vibration isolation module according to the second embodiment of the present invention.

6 is a cross-sectional view taken along the line B-B in FIG.

* Explanation of symbols for main parts of the drawings

1: Sonar 1 ': Underwater acoustic countermeasure system

2,2 ': sensor part 3: cable

7: winch 9: vibration isolation module

11,11 ': Signal transmission module 13,13': Sound module

15: array stabilization module 17: tail rope

19, 21, 24: connector assembly 20: cylindrical tube body

22: vibration damping unit 26,28: tension rope

30; Spacer 32: Tension Sensor

34,36: acceleration sensor 38: connector

The present invention relates to a towing type sonar detection device having a vibration isolating module, and more particularly, to absorb the vibration of the towing cable due to the tension force and fluid resistance generated when the sensor unit for the sonar detection, the sound of the sound module The present invention relates to a towing type sonar detection apparatus including a vibration isolation module such that a sensor does not interfere with the detection of a signal due to vibration or accurate detection of an acoustic signal.

Electrical devices used for electronic and electronic devices, transceivers, sensors, or electrical connections are tightly mounted inside cylindrical seals such as tubes, pipes, or hoses to provide electrical connections at installation locations requiring watertightness, such as ocean or river. It is well known that a sonar is known to maintain good mechanical properties such as pressure resistance, tensile strength, bending strength or kinetic properties without being affected.

As a well-known underwater sound wave detection device of this type, a tow-type underwater wave detection device which is towed by a ship or the like and detects sound waves generated under the surface of the water is known, and such a tow-type underwater wave detector is generally a towing cable, a sensor unit and It is composed of a tail rope, and in the form of a towed sonar having such a configuration, for example, an external hose, a hydrophone, a spacer element, a tension, such as a towed underwater seismic streamer. Some are composed of a wire, bulkhead, and hydrophone mount.

Since the underwater seismic probe is made of a single layer of polyvinyl chloride or polyurethane material, it is easy to break the connection part when high tension is applied to the body due to resistance by sea water. Although reinforcing tension wires were arranged over the entire length of the body, this arrangement prevented the isolation of the longitudinal waves consisting of the kinetic components propagating directly from the ship and the vibrational components due to the vortices generated around the cables in each section. .

Therefore, in this apparatus, mechanical noise generated throughout the sensor portion due to vibration cannot be effectively suppressed, and accurate sound detection by the sensor portion is difficult. In addition, there was a difficulty in maintenance, such as repair when a partial breakage or failure occurred.

Another form of sonar is a tow-type array sonar system. The detector is connected to the ship by a cable and is towed to detect useful sound waves through the signal processing by the sensor part surrounded by a cylindrical tube body.

Such a detector, in addition to the above-mentioned form, a cylindrical tube comprising a plurality of coaxial surface layers of elastomer or plastic, a hydrophone surrounded by the surface layer, a connector for connecting the hydrophone, and a sensor part composed of a filling oil filled in the surface layer. It consists of a sieve and vibration isolation module. In the case of the towed sonar, except for the vibration isolation modules located at the front and the rear, the entire sensor unit is arranged in a row with the hydrophones surrounded by a plurality of surface layers and maintained at a predetermined interval so that they are relatively thin with each other along the center line. There is no problem in electrical connection and watertightness or fluid resistance since they are repeatedly connected to each other along the centerline.

In addition, as the material of the surface layer, the damping characteristic is maintained relatively good and has high rigidity, so the noise reduction effect due to mechanical damping is excellent, and the bulge wave due to the turbulent boundary layer is not generated, but urethane or elastomer Since the surface is composed of a plurality of surface layers, etc., the detection of the acoustic signal by the acoustic sensor enclosed by the plurality of layers is not sufficient, and it does not have a separate tension member. Had the disadvantage of breaking.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the conventional sonar as described above, in which the respective parts of the sonar are modularized to a connector assembly fitted to both ends of the cylindrical tube body of each module. By connecting them, the tension member extending through the whole device is divided into module sizes so that the longitudinal vibrations transmitted from the towing cable can be isolated in each module unit, and at the same time, it is directly bonded to the towing cable. By deciding the module in front of the sensor part as a module for isolating vibration, the vibration generated around the sensor part is attenuated by the fluid resistance during towing as well as the vibration transmitted from the cable as described above. Due to mechanical noise caused by vibration, false signals can be captured or Which is not to correct the sound signal acquisition is not interrupted will be there is provided a vibration isolation module of a sonar device.

Still another object of the present invention is to provide an underwater sound wave detection device having such a vibration isolation module.

In order to achieve the above object, the present invention provides a towing type sonar detector which is composed of a sensor unit for underwater sound wave detection, a towing cable connecting the sensor unit to a towing vessel, and a tail rope joined to the opposite side of the cable of the sensor unit. In the above, the sensor unit provides a towing type sonar detector consisting of a vibration isolation module, a signal transmission module, an acoustic module, and an array stabilization module.

In another aspect, the present invention provides a towing type underwater acoustic countermeasure system comprising a sensor unit for sonar detection, a towing cable connecting the sensor unit to a towing vessel, and a tail rope joined to an opposite side of the cable of the sensor unit. The sensor unit provides a towing type underwater acoustic countermeasure system composed of a vibration isolation module, a signal transmission module, and an acoustic module.

In addition, in the vibration isolating module of the tow-type sonar detector, a cylindrical tube body, a connector assembly fitted to both ends of the cylindrical tube body to connect with other adjacent modules and cables, both ends are joined to the connector assembly and the cylindrical tube It provides a towing type sonar detector composed of a vibration damping unit surrounded by a sieve and filled with a filling oil.

In addition, in the vibration isolating module of the towed hydroacoustic counter system, the connector assembly for connecting the tubular tube body, the vibration damping unit is fitted to both ends of the cylindrical tube body and the other modules and cables adjacent to the connector assembly, the connector assembly An object of the present invention is to provide a towing type sonar detector which is composed of a vibration damping unit surrounded by both ends of the cylindrical tube body.

Hereinafter, the configuration according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show the state of use of the tow hydrophone 1 and the hydroacoustic counter system 1 'according to the present invention. The sonar and underwater acoustic countermeasure system (1,1 ') is generally used for towing the sensor unit (2,2') for detecting underwater sound, the vessel (5) and the sensor unit (2, 2 '). It is connected to the cable 3, the rear end of the sensor unit (2, 2 ') is composed of a tail rope 17 for attenuating the vibration transmitted to the sensor unit (2, 2'). In use, the sensor units 2, 2 'are floated in water with their own buoyancy by the filling oil 18 filled therein and are connected to the vessels by cables 3 connected in front of the sensor units 2, 2'. It is towed to detect the sound below sea level connected to the aft and is wound by a winch 7 fixed to the vessel 5. At the rear of the sensor portion, a tail rope 17 is attached on the concentric line.

The sensor part 2 of the sonar detector shown in FIG. 1 is connected to the cable 3 and the connector 21 by a tip, and a vibration isolating module 9 which attenuates the vibration transmitted from the cable 3 when towing. isolation module), the front end of which is connected to the rear end of the vibration isolation module 9 by a connector 19, a signal transmission or data link module for digitally converting an input analog signal and transmitting it to the acoustic signal processing apparatus of the ship 5 (11; telemetry data module), the front end is connected to the rear end of the signal transmission module 11 'connected with a connector 19, the acoustic module 13 for receiving an acoustic signal of the underwater target and outputting it to the signal transmission module 11' ; an acoustic module, the front end of which is connected to the rear end of the acoustic module 13 through the connector 19, the rear end of which is connected to the tail rope 17, the vibration that is not attenuated in the vibration isolation module 9 is the tail rope 17 To stabilize the array by passing out through It consists of; (array stabilization module 15) stabilization module.

Also shown in FIG. 2 is a towed hydroacoustic countermeasure system 1 'according to the present invention. The sensor part 2 'of this device is a vibration isolating module 9, the tip of which is connected to the cable 3 and the connector 21 to attenuate the vibration transmitted from the cable 3 when towing, and the vibration isolating module of the tip. A signal transmission module 11 'is connected to the rear end of the connector 9 for digital conversion of the input analog signal, and the front end is connected to the connector 19 at the rear end of the signal transmission module 11'. It is connected to the connection is composed of a sound module (13 ') for receiving the sound signal of the underwater target and output to the signal transmission module (11').

3 and 4, the vibration isolation module 9 of the sensor part 2, 2 'is shown, which is surrounded by a cylindrical tubular body 20 (hose) made of polyurethane. It is connected in series with the connectors 19 and 21 to form a linear arrangement as a whole. The vibration damping unit 22 is built in the state in which the filling oil 18 is filled in the hose 20.

According to the first embodiment, the vibration damping unit 22 has two unit units in which two cylindrical tubular kevlar ropes 26 in the up and down direction and a nylon rope 28 in the transverse direction are considered in consideration of assembly difficulties. It is divided into and connected to the connector (24) in the middle of each unit unit. In the middle of these ropes is fitted a spacer 30 that holds the wire passing through the hose 20 and prevents the hose 20 from bending when the entire sensor section 2, 2 ′ is wound around the winch 7. . The tension sensor 32 for measuring the tensile force acting is attached to the cable 3 and the connection part of the sensor part 2 and 2 'which the tension force acts the most when towing the sensor part 2,2'.

Right inside the connector 19 on the opposite side of the cable 3 of the vibration isolation module 9 and the connector 21 on the side of the cable 3, a horizontal accelerometer 34 measuring horizontal accelerations of the sensor units 2 and 2 ', respectively, And a longitudinal accelerometer 36 for measuring the acceleration in the vertical direction, and the connector 38 is provided between the longitudinal accelerometer 36 and the tension sensor 32.

According to the vibration damping unit 22, when a towing force of about 1 ton is applied at the time of towing, the tension force is first applied to the nylon rope 28 to fully cushion the vibration generated from the towing cable 3, and then the kevlar rope 26 ), The remaining tension force is applied to the rope 26 is stretched. Kevlar rope also stretches by a certain amount while buffering vibration in the same manner as the nylon rope 28, and then maintains the tensile force. Then, the remaining vibrations, which are not damped by the ropes 26 and 28, are secondarily damped by the filling oil 18.

In addition, when the tensile force is applied relatively to the sensor unit 2,2 'as in the operation of the device (1,1'), the nylon rope 28 is applied when the tensile force is relatively increased, such as when the device is evacuated. As a result of the tensile force 26, the sensor parts 2 and 2 ′ can be maintained in an elastic and high tensile state.

5 and 6 show a second embodiment of the vibration isolating module 9 of the present invention, except that the tension rope consists of one strand of nylon rope 48 passing through the central axis. Is the same as in the first embodiment.

As described above, according to the present invention, vibration of the towing cable 3 due to tensile force and fluid resistance generated when towing the towed sonar 1 or the sensor units 2 and 2 'of the underwater acoustic counter system 1'. By buffering the signal by the vibration of the acoustic sensors of the acoustic module (13, 13 ') or to prevent the accurate acoustic signal detection is prevented.

The present invention as described above is capable of various modifications and changes by those skilled in the art through the detailed description and drawings of the invention within the scope without departing from the spirit and scope described in the appended claims. Will do.

Claims (5)

A signal transmission module 11 for digitally converting and inputting an analog signal to be transmitted, and is connected to a rear end of the signal transmission module 11 and receives an acoustic signal of an underwater target and outputs the sound signal to the signal transmission module 11. A sensor unit 2 having a 13, a towing cable 3 connecting the vessel 5 and the sensor unit 2, and a sensor unit 2 connected to a rear end of the sensor unit 2; In the towing type sonar detector (1) consisting of a tail rope (17) for attenuating the vibration transmitted to the), the sensor unit (2) is a cylindrical tube body (20), the cylindrical tube body (20) Both ends are connected to the connector assembly (19, 21), the connector assembly (19, 21) to be connected to both ends of the signal transmission module 11 and the cable 3, the cylindrical tube body 20 A vibration isolation module 9 composed of a vibration damping unit 22 filled with a filling oil 18 surrounded by For Doll sonar, it characterized in that that. The connector according to claim 1, wherein the vibration damping unit (22) is joined between the tension ropes (26, 28) extending in the longitudinal direction of the cylindrical tube body (20), and the tension ropes (26, 28). Assembly 24, a plurality of spacers 30 sandwiched between the connector assembly 24 and the connector assemblies 19, 21, and installed between the tension ropes 26, 28 and the connector 21 on the cable 3 side. A tension sensor 32, a transverse accelerometer 34 and a closing price, respectively located in the connector 19 opposite the cable 3 of the vibration isolation module 9 and immediately inside the cable 3 group connector 21, respectively. A towing type sonar detector comprising a speedometer (36), a connector (38) provided between the longitudinal accelerometer (36) and the tension sensor (32). 2. The tension rope according to claim 1, characterized in that the tension rope is composed of two strands of kevlar ropes 26 extending in the up and down direction of the cylindrical tube body 20 and two strands of nylon ropes 28 extending in the up and down direction. Towed sonar. The tow hydrophone according to claim 1, wherein said tension rope is composed of a single strand of nylon rope (88) extending in the longitudinal direction of said cylindrical tube body (20). A signal transmission module 11 'for digitally converting and inputting an analog signal to be transmitted, and is connected to a rear end of the signal transmission module 11' and receives an acoustic signal of an underwater target and outputs it to the signal transmission module 11 '. A sensor unit 2 'having an acoustic module 13', a towing cable 3 connecting the vessel 5 and the sensor unit 2 ', and a rear end of the sensor unit 2'. In the tow-type hydroacoustic countermeasure system 1 ', which is composed of a tail rope 17 for attenuating vibration transmitted to the sensor unit 2, the sensor unit 2 is a cylindrical tube body 20. ), The connector assemblies 19 and 21 inserted into both ends of the cylindrical tube body 20 and connecting the signal transmission module 11 ′ and the cable 3 to both ends of the connector assembly 19 and 21. Vibration isolation module 9 composed of a vibration damping unit 22 bonded and surrounded by the cylindrical tube body 20 and filled with the filling oil 18. For a doll against underwater acoustic systems, characterized in that comprises.