KR20170104193A - underwater radiated noise measuring device and establishment method for the same device - Google Patents

Abstract

The present invention provides an underwater radiated noise measuring apparatus, which is an optimal design for efficiently and accurately measuring underwater radiated noise generated in a ship by stably dispersing a plurality of hydrophones on the ship. In addition, an object of the present invention is to provide an installation method of the underwater radiated noise measurement apparatus, which can effectively and easily install the underwater radiated noise measurement apparatus on a ship. The underwater radiated noise measuring apparatus includes: a fixing line disposed in a circumferential direction of the ship; a fixing bar disposed in parallel to the fixing line; and a plurality of clamps formed to penetrate the fixing line and the fixing bar.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater radiated noise measuring apparatus,

The present invention relates to an apparatus for measuring underwater radiated noises, and more particularly, to an optimal design and an installation method for a device for measuring a near-far ceiling noise of a ship.

There are various kinds of noise in seawater, and there are largely classified natural underwater noises naturally generated by biological movements, winds on the sea surface, seismic waves on the sea floor, and artificial underwater noises generated by human industrial activities. Among such artificial underwater noises, in particular, the noise generated from mechanical devices such as a propeller, an engine, a motor, a gear, etc. of a ship during operation or berth of the ship is transmitted to the underwater through the vibration of the hull, It is called underwater radiated noise. Underwater radiated noise is expressed as the intensity of noise on the distance, and it is used as one of the most important measures for determining the performance of military ships.

Conventionally, various methods have been used to measure underwater noise, such as a method of using a measuring vessel, a method of measuring apparatus being pierced on the seabed, a method of remotely transmitting an acoustic signal. Fig. 1 shows examples of such conventional various underwater noise measurement devices. Although the measurement devices used in this measurement method are different in configuration from each other as needed, they commonly include a measurement sensor for measuring sound. With regard to measurement of underwater noise, design techniques for appropriately and optimally arranging these sensors for measurement, technology for transmitting sound signals measured by a measurement sensor in a wired or wireless manner, and delay and noise generated in such signal transmission And a technique for effectively removing it have been studied variously.

Korean Patent Registration No. 1357763 ("Automated Recording Hearing Amplifier and Method for Measuring Underwater Radiation Noise in Ship Using the Method and Method", Apr. 24, 2014), can be used to transmit sound signals measured by a sensor for acoustic measurement, that is, a hydrophone, In order to solve the problem of multiplexing and complicating a cable as the number of hydrophones increases, a device that is connected to an automatic recording device in a hydrophone and is configured in a compactly integrated form by a housing . Korean Patent Registration No. 0971079 ("Method and System for Measuring Noise Using GPS", July 12, 2010), even if the position of a sensor for acoustical measurement, ie, a sound sensor, fluctuates due to the influence of algae, And an ultrasonic transmission unit is provided in the air cleaner to enable position measurement. The devices disclosed in these prior art documents are devices in which the underwater noise measurement device itself is provided independently in the seawater to acquire and measure underwater noises generated in various noise sources.

On the other hand, as described above, how much underwater radiated noise is generated on a ship is a measure of the performance of the ship. Especially, in case of a military ship, it is the most important matter. As a result, research efforts have been made to reduce the underwater radiated noise generated in ships. For example, Japanese Patent Application Laid-Open No. 2006-168605 ("Propeller Underwater Radiation Noise Reduction Device and its Propulsion Device or Ship &Quot;, Jun. 29, 2006) discloses a technique in which a nozzle is disposed around a propeller, an ultrasonic generator is installed on an inner surface of a nozzle inner wall, and an underwater radiated noise generated in a propeller is reduced using ultrasonic waves generated by an ultrasonic generator .

On the other hand, it is also important to accurately measure how much underwater radiated noise actually occurs on a ship. In the case of measurement of underwater radiated noise at a long distance, since the conventional underwater noise measurement technique can be adopted as it is, it has not been studied in a relatively in-depth manner. However, in order to more accurately grasp the underwater radiated noise generated in an individual ship, it is increasingly necessary to measure at a near distance far from the conventional measurement distance. In particular, there is a need to understand the distribution of ship noise, such as the occurrence of more underwater radiated noise, especially in various parts of the ship.

In order to measure the underwater radiated noise at such a short distance from the ship, it is difficult to perform effective measurement with the conventional underwater noise measuring apparatus as shown in FIG. 1 or the above-mentioned prior art documents. In order to measure underwater radiated noise generated near the ship, a large jig for sensor installation was fabricated and fixed on the top of the ship. However, since such a jig for sensor installation is large and heavy, installation work must be performed using a large crane, so it is difficult to work and it is difficult to carry it to a ship after the production. In addition, there is an inconvenience that it is necessary to install a structure for fixing the large and heavy sensor mounting jig to the upper part of the hull. Above all, since the jig for sensor installation must be manufactured separately according to the hull, resources such as manpower, cost, and time are wasted in production. Thus, there is a growing demand for a measurement apparatus optimized for measuring underwater radiated noise at a near-sea level.

1. Korean Patent Registration No. 1357763 ("Automatic Recordable Hydrophone and Device for Measuring Underwater Radiated Noise in Ship Using it and its Method", 2014.01.24) 2. Korea Patent No. 0971079 ("Method and System for Measuring Noise Using GPS", July 12, 2010) 3. Japanese Patent Laid-Open Publication No. 2006-168605 ("Propeller submersible noise reduction device and propulsion device or vessel with the same ", Jun. 26, 2006)

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a hydrophone capable of stably dispersing a plurality of hydrophones on a ship, An object of the present invention is to provide an apparatus for measuring underwater radiated noises, which has an optimum design for effectively and accurately measuring noise at a short distance. It is also an object of the present invention to provide an installation method of an underwater radiated noise measurement apparatus which enables the above-mentioned underwater radiated noise measurement apparatus to be installed on a ship easily and effectively.

In order to accomplish the above object, an apparatus 100 for measuring underwater radiated noises according to the present invention includes: a fixed line 110 disposed in a circumferential direction of a ship 500 and having a plurality of parallel lines; A fixed bar 120 extending parallel to the longitudinal direction of the hull 500 and disposed perpendicularly to the fixed bar 110 and having a plurality of parallel bars; A plurality of clamps 130 provided at intersections of the fixing bar 110 and the fixing bar 120 and formed to penetrate the fixing bar 110 and the fixing bar 120 respectively; And a center portion 142 to which the three leg portions 141 and the leg portions 141 are connected and connected to each other. The ends of the leg portions 141 are connected to a portion A plurality of support rods 140 formed to be connected with the support rods 140; A plurality of hydrophones (150) connected to the center portion (142) of the support base (140) and obtaining underwater radiated noise radiated from the hull (500); . ≪ / RTI >

The end of the leg portion 141 is connected to the upper surface of the clamp 130. The upper end of the leg portion 141 is fixedly connected to the upper surface of the clamp 130, The upper surface of the clamp 130 may be connected in the form of a ball joint.

The clamp 130 includes a lower surface 131 which is in close contact with the surface of the hull 500, an intermediate portion 132 which is formed on the upper surface of the lower surface 131 and has a groove formed on the upper surface thereof, 132 and the upper surface portion 133 is formed by bolting the upper surface portion 133. The lower surface portion 131, the intermediate portion 132, and the upper surface portion 133 are assembled by bolting And the fixing bar 110 and the fixing bar 120 may be formed to pass through the through hole formed by the intermediate portion 132 and the grooves formed in the upper surface portion 133.

The underwater radiated noise measurement apparatus 100 further includes a plurality of protrusions 160 disposed at the left and right ends of the hull 500 and connected to both ends of the fixed line 110, respectively. As shown in FIG. The underwater radiation noise measuring apparatus 100 may be configured such that the connection structure between the protrusion 160 and the fixing line 110 includes a helical clamp so as to adjust the length of the fixing line 110 .

In addition, the support member 140 may be adjustable in height.

In addition, the underwater radiated noise measuring apparatus 100 is configured to transmit the acoustic signal obtained from the hydrophone 150 by wire, and the cable 155 for transmitting an acoustic signal, which is provided in the hydrophone 150, And can be disposed and fixed along the fixed bar 120 or the fixed bar 110. [

In addition, the method for installing an underwater radiated noise measurement apparatus according to the present invention includes: a plurality of fixed rods 110; A plurality of fixed rods 120; A plurality of clamps (130); And a center portion 142 to which the three leg portions 141 and the leg portions 141 are connected and connected to each other. The ends of the leg portions 141 are connected to a portion A plurality of support rods 140 formed to be connected with the support rods 140; A plurality of hydrophones (150) connected to the center portion (142) of the support base (140) and obtaining underwater radiated noise radiated from the hull (500); (EN) A method of installing an underwater radiated noise measurement apparatus for measuring an underwater radiated noise radiated from a hull (500), the method comprising the steps of: And the other end of the fixing line 110 is fixed to the protrusion 160 formed on the other side of the fixed line 110. The other end of the fixing line 110 is fixed to the protrusion 160 formed on the other side, A fixed line installation step; A fixed line arrangement step in which the fixed line installation step is repeated as many times as the number of the fixed lines 110 so that a plurality of the fixed lines 110 are arranged parallel to each other; A fixing rod mounting step in which the fixing rod 120 is inserted into the clamp 130 inserted in the fixing line 110 so that the fixing rod 120 is disposed in the longitudinal direction of the hull 500; Wherein the fixing rods (120) are repeatedly installed by the number of the fixing rods (120) so that the plurality of fixing rods (120) are arranged parallel to each other; Adjusting the height of the hydrophone so that the hydrophone (150) is arranged at a position spaced apart from the hull (500) by a predetermined interval; . ≪ / RTI >

The underwater radiated noise measurement apparatus 100 may be configured such that the connection structure between the protrusion 160 and the fixing line 110 includes a helical clamp so that the length of the fixing line 110 can be adjusted Wherein the fixing line 110 connected to the protrusions 160 on the port and starboard side of the hull 500 is connected to the bottom of the hull 500, A fixing line fixing step of being further pulled and fixed by rotation of the helical type clamp; As shown in FIG.

According to the present invention, in a conventional underwater noise measurement apparatus, it is possible to solve the limitation that the measurement can be performed at a long distance from the vessel, and thus a plurality of hydrophones can be stably dispersed on the ship, There is a great effect that noise can be accurately and accurately measured at a close range. Accordingly, it is possible to acquire a variety of accurate and useful information, such as the intensity distribution of underwater radiated noise on the ship, which was not known by the conventional method. In addition, according to this effect, the level of underwater radiated noise generated from the ship can be judged with a more accurate scale, and there is an additional effect of improving the accuracy and utilization of the ship performance criterion.

In addition, in comparison with the conventional technique in which a sensor jig for measurement of underwater radiated noise is manufactured and fixed to the upper part of the ship, the volume and weight of the measuring device itself is relatively small in the case of the present invention, It is very easy to manufacture, transport, and install. In addition, since the present invention is not greatly affected by the shape of the hull, it is possible to easily change the shape of the hull to change the shape of the hull for measurement of underwater radiated noise, thereby eliminating the inconvenience of newly preparing a jig for each hull It is also effective to save resources such as cost, manpower and time.

1 shows examples of various conventional underwater noise measurement apparatuses.
2 is an overall perspective view of an embodiment of an apparatus for measuring underwater radiated noise according to the present invention.
3 is a partial perspective view and front view of an embodiment of an apparatus for measuring underwater radiated noise according to the present invention.
4 is a view showing various embodiments of a clamp of an apparatus for measuring underwater radiated noises according to the present invention.
5 is an embodiment of a support for an underwater radiated noise measurement apparatus according to the present invention.
6 is a view showing a position of a hydrophone of an apparatus for measuring underwater radiated noise according to the present invention.

Hereinafter, an apparatus for measuring underwater radiated noise according to the present invention having the above-described structure and a method of installing the apparatus will be described in detail with reference to the accompanying drawings.

FIG. 2 is an overall perspective view of an embodiment of an apparatus for measuring underwater radiation noise of the present invention, and FIG. 3 is a partial perspective view and a front view of an embodiment of the apparatus for measuring underwater radiation noise of the present invention. 2 and 3, the apparatus 100 for measuring underwater radiated noises of the present invention includes a plurality of fixed rods 110, a plurality of fixed rods 120, a plurality of clamps 130, A support table 140, and a plurality of hydrophones 150. The parts and their connection will be described in more detail as follows.

2 and 3, the fixing line 110 is disposed in the circumferential direction of the hull 500, and a plurality of the fixing lines 110 are disposed parallel to each other. The fixing rods 120 extend in parallel to the longitudinal direction of the hull 500 and are arranged perpendicular to the fixing rods 110, and a plurality of the fixing rods 120 are arranged in parallel with each other. That is, the fixing rod 110 and the fixing rod 120 form a grid-like shape in the longitudinal direction of the ship body and the circumferential direction of the ship body on the surface of the ship body 500. At this time, the spacing distance between the plurality of fixing rods 110, the spacing distance between the plurality of fixing rods 120, and the position of the intersection of the plurality of fixing rods 120 are determined according to the arrangement position of the previously designed hydrophone 150 The method for installing the apparatus for measuring underwater radiated noises of the present invention will be described later in more detail).

The clamp 130 is provided at the intersections of the fixing bar 110 and the fixing bar 120. The clamp 130 allows the fixing rod 110 and the fixing rod 120 to be stably fixed without departing from the fixed position. In order to stably fix the fixing bar 110 and the fixing bar 120, the clamp 130 is formed to penetrate the fixing bar 110 and the fixing bar 120, respectively. That is, the clamping rod 110 and the fixing rod 120 are overlapped and tightly fitted by the clamp 130, so that the respective spacing distance and the correct position can be fixed well.

Fig. 4 shows several embodiments of clamps of an underwater radiated noise measurement apparatus according to the present invention. 4, the clamp 130 includes a lower surface 131 that is in close contact with the surface of the hull 500, a middle portion 132 that is stacked on the lower surface 131, And an upper surface portion 133 formed on the lower surface of the intermediate portion 132 and having a groove formed on the lower surface thereof. The lower surface portion 131, the intermediate portion 132, and the upper surface portion 133 And assembled by bolting. The fixing bar 110 and the fixing bar 120 are formed to pass through the holes formed in the intermediate portion 132 and the upper surface portion 133.

As described above, the clamp 130 fixes the fixing rod 110 and the fixing rod 120 at the same time, thereby fixing the position stably. However, since the fixing rods 110 and the fixing rods 120 are disposed perpendicular to each other, it is difficult to adjust the positions of the fixing rods 110 and the fixing rods 120 when they are both passed through the clamps 130. That is, when the clamp 130 is formed integrally, it is very difficult to substantially fix the fixing rod 110 and the fixing rod 120 at the same time.

However, since the clamp 130 is detachable as in the embodiment of FIG. 4, the installation can be easily accomplished by working in the following order. First, the bottom surface 131 of the hull 500 is closely fixed to the hull 500 so that the position of the hull 131 is properly held in advance. Next, when the intermediate portion 132 is laminated on the lower portion 131, the groove formed on the upper surface of the intermediate portion 132 is exposed. Therefore, the fixing bar 110 and the fixing bar 120 can be arranged in a very easily intersecting manner in the exposed grooves. The fixing rod 110 and the fixing rod 120 are inserted into the through holes formed in the middle portion 132 and the upper surface portion 133 so as to be engaged with each other, So that they are stably arranged. By firmly tightening the bolts in this state, the fixing rod 110 and the fixing rod 120 can be tightly fixed and can be fixed very well in a fixed position without fear of displacement.

Of course, if it is necessary to adjust the position after fixing the position as described above or if it is necessary to adjust the position by another reason, the fixing rod 110 and the fixing rod 120 can be freely moved . That is, since the clamp 130 is formed as in the embodiment of FIG. 4, not only the installation work can be easily performed, but also the post-installation change operation can be performed very easily.

On the other hand, FIG. 4 (C) shows various examples when the clamp 130 and the support 140 are connected. 2 and others, some of the plurality of clamps 130 may be connected to the support 140, which may be fixedly connected as shown in the left side of FIG. 4 (C) (C) as shown in the right drawing.

The support base 140 is formed in a triangle shape including three legs 141 and a central portion 142 where the legs 141 are gathered and connected. 2 and 3 illustrate the hull 500 in a highly simplified form with cylindrical and smooth sides, but in reality the sides of the hull 500 may have various curvatures and may have various components or structures on the surface Can be formed. As described above, since the tripod type is the most simple and effective type for stably supporting the weight and maintaining the static stability, the support 140 (140) Is preferably formed in the form of a tripod.

5 shows an embodiment of a support for an underwater radiated noise measurement apparatus according to the present invention. It is preferable that the support member 140 is adjustable in height. In the embodiment of FIG. 5, the length of the legs 141 is adjustable. In this case, the leg portions 141 and the connecting portions of the center portion 142 should be adjustable in angle, and the ends of the leg portions 141 and the upper surface of the clamp 130 may be adjustable in angle 4 (C), as shown in the right drawing. 5, the hydrophone 150 is connected to the center portion 142, and thus the height of the support portion 140 can be adjusted. As a result, The distance from the surface of the substrate 500 can be adjusted as desired.

5, the height of the support 140 may be varied by adjusting the length of the leg 141 to adjust the height of the hydrophone 150. However, the present invention is not limited thereto. It is not. For example, when the hydro-phone 150 is connected to one end of the elastic member 150, the height of the support member 140 may be fixed to the hydrophone 150 Can be adjusted. In this case, since the height of the supporter 140 does not vary, the angle between the leg 141 and the center 142 and the angle between the leg 141 and the clamp 130 do not need to be changed. Therefore, in this case, the end of the leg 141 and the upper surface of the clamp 130 may be fixedly connected as shown in the left side of FIG. 4 (C).

As described above, the hydrophone 150 is connected to the center portion 142 of the supporter 140 and obtains the underwater radiated noise radiated from the hull 500. A hydrophone is a device called a hydrophone, a water jar, etc., which can acquire and measure an acoustic signal in water. Generally, a hydrophone includes a piezoelectric transducer composed of a piezoelectric crystal or ceramic material sensitive to a pressure, and the piezoelectric transducer converts a pressure change around the hydrophone generated by an acoustic acoustic wave into an electrical signal The sound can be measured. The specific configuration of such a hydrophone is variously disclosed by commercialized products and the like, and these products can be appropriately adopted according to the specifications required in the present invention.

In the present invention, the acoustic signal obtained from the hydrophone 150 may be transmitted by wire. In this case, the sound signal transmitted from the hydrophone 150 (as shown in FIG. 5) The cable 155 may be arranged and fixed along the fixing bar 120 or the fixing bar 110. [ The cable 155 can be easily fixed using a component such as a general cable tie.

FIG. 6 shows the positions of the hydrophones in the apparatus for measuring underwater radiated noise according to the present invention. 6, the hydrophones 150 are spaced a predetermined distance radially from the surface of the hull 500 by the support 140, as shown in FIG. Position.

As described above, the plurality of fixed rods 110 and the fixed rods 120 form a grid-like shape in the circumferential direction x of the hull 500, and the hydrofoil 150 A guide line in the radial direction of the hull 500 is indicated by a black circle in FIG. 6 when the guide line meets the surface of the hull 500. If noise is generated at any one of the black circle points (that is, when the corresponding black circle is a noise source), the noise intensity measured at the hydrophone 150 located at the white circle corresponding to the corresponding black circles will be the largest. Since the plurality of hydrophones 150 are widely distributed on the surface of the hull 500 as shown in the figure, the noise intensity obtained by each of the hydrophones 150 is compared with each other, 500) can be accurately determined. In this way, the noise intensity distribution generated around the hull 500 can be obtained.

The conventional underwater noise measurement apparatus as shown in FIG. 1 has only accuracy to the extent that a single hull is regarded as a single noise source and noise measurement is performed. Therefore, when a conventional underwater noise measurement apparatus is used, for example, when it is assumed that a certain hull has more noise on the left side and less noise on the right side, it is determined whether the hull is on the left side or the right side of the underwater noise measurement apparatus Therefore, the intensity of the measured noise is different, and it is difficult to accurately determine the underwater radiated noise level of the hull. In addition, since a single hull is regarded as a single noise source, the underwater noise measurement device and the hull must be far enough away from each other, so that there is a limit that can be performed only at a distance.

However, according to the present invention, as described above, a plurality of hydrophones are distributed and arranged on the near side of the hull, so that how much noise is generated in the part of the hull can be obtained as the noise intensity distribution. Accordingly, the level of underwater radiated noise generated in the hull can be obtained much more precisely and precisely than in the past, and it is possible to provide a more reasonable standard for discriminating the superior performance of a military ship such as a warship. In addition, the present invention is optimally designed for effective measurement of underwater radiated noise of the hull, and can be easily applied to any hull.

A method of installing the underwater radiated noise measurement apparatus as described above will be described step by step. In order to smoothly install the underwater radiated noise measurement apparatus 100 on the hull 500, as shown in FIG. 3 (B), the underwater radiation noise measuring apparatus 100 is disposed at the left and right ends of the hull 500, It is preferable to further include a plurality of protrusions 160 to which both ends of the fixing line 110 are connected.

The fixed line 110 is installed in the protruding portion 160 formed on either one of the port side and the starboard side of the hull 500 so that the fixed line 110 is disposed in the circumferential direction of the hull 500, 110 are fixed and the other end of the fixing line 110 is fixed to the protrusion 160 formed on the other side.

In the fixed line arrangement step, the fixed line installation step is repeated for the number of the fixed lines 110, so that the plurality of fixed lines 110 are arranged parallel to each other. At this time, the arrangement positions of the fixing rods 110 and the distance between the fixing rods 110 are appropriately determined on the basis of the predetermined hydrophone position 150 since the position where the hydrophone 150 is to be disposed finally is designed in advance . As an example, the pair of fixing rods 110 may be spaced apart by 500 mm on the right and left sides of one hydrophone 150.

The fixing rod 120 is inserted into the clamp 130 fitted in the fixing rod 110 so that the fixing rod 120 is disposed in the longitudinal direction of the hull 500, . As described in the description of the clamp 130 through FIG. 4, in order to perform a smooth installation work, the fixing rod 120 is freely movable until the fixing rod 120 reaches a predetermined position It is preferable that the upper surface portion 133 of the clamp 130 is not yet covered at this stage.

The fixing rod disposing step is performed such that the fixing rod 120 is repeatedly installed by the number of the fixing rods 120 so that the plurality of fixing rods 120 are arranged in parallel with each other. At this time, the placement positions of the fixing rods 120 and the distance between the fixing rods 120 may be appropriately determined based on the position of the hydrophone 150, as in the case of the fixing rope 110. As an example, the pair of fixing rods 120 may be spaced apart by 500 mm above and below one hydrophone 150.

Finally, in the hydrophone height adjusting step, the hydrophone 150 is height-adjusted to be disposed at a predetermined distance from the hull 500. In this case, the height of the hydrophone 150 (that is, the distance from the surface of the hull 500) is also designed and determined in advance. For example, the height of the hydrophone 150 may be 1000 mm.

By sequentially performing these steps, it is possible to easily and smoothly install the apparatus 100 for measuring underwater radiated noises of the present invention described in FIG. 2 or the like on the ship.

The underwater radiated noise measuring apparatus 100 can be installed on the hull 500 only by the steps described above. In order to complete the installation by the above-described steps, in the course of performing the fixing rod arranging step, 130 may be covered and fixed. However, since such a work is practically performed in water, it is difficult to arrange all the parts in a perfect position at once, and it is desirable to perform the work of adjusting the positions of the legs while adjusting the positions of the legs little by little after completion of the installation .

In order to adjust the positions of the legs after completion of the installation, it is unnecessary to arrange the fixing bar 110 in a proper position from the beginning in the fixing bar 110, So that the guide rope can be once hooked to the protrusion 160 in the fixed line installation step. In this case, after the other steps are performed, the guide line is pulled after the installation is completed, so that the fixing line 110 is completely fixed to the protrusion 160.

In this case, the installation method of the underwater radiated noise measurement apparatus may include a fixing line fixing step for completely fixing the fixing line 110 after the adjustment of the position after the installation of the hydrophone 150, . The underwater radiation noise measuring apparatus 100 may be configured such that the connection structure between the protrusion 160 and the fixing line 110 includes a helical clamp so as to adjust the length of the fixing line 110 . In this case, in the fixed line fixing step, the fixing line 110 connected to the protrusion 160 on the port side and the starboard side of the hull 500 is further pulled and fixed by the rotation of the helical type clamp. In this case, the upper portion 133 of the clamp 130 is covered and fixed after the fixing line fixing step since the fixing fire 110 must be movable freely until the fixing line fixing step is completed. I will.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

100: Underwater radiated noise measurement device
110: fastening line 120: fastening rod
130: Clamp 131:
132: intermediate portion 133: upper surface portion
140: Support
141: leg portion 142: center
150: Hydrophone 155: (hydrophone) cable
160: protrusion
500: Hull

Claims (9)

A fixed bar arranged in a circumferential direction of the hull and having a plurality of bars arranged parallel to each other;
A fixed bar extending parallel to the longitudinal direction of the hull and disposed perpendicularly to the fixed bar, the plurality of fixed rods being disposed parallel to each other;
A plurality of clamps provided at intersections of the fixing rods and the fixing rods, the plurality of clamps being formed to penetrate the fixing rods and the fixing rods respectively;
A plurality of supports formed in the form of a tripod including three legs and a central portion to which the legs are connected, the ends of the legs being connected to a selected one of the clamps;
A plurality of hydrophones connected to the center of the support and obtaining underwater radiated noise radiated from the hull;
And a detector for detecting the underwater radiation noise.
The clamp according to claim 1,
An end of the leg portion is connected to an upper surface,
An end of the leg portion is fixedly connected to an upper surface of the clamp,
And an end of the leg portion and an upper surface of the clamp are connected to each other in the form of a ball joint.
The clamp according to claim 1,
A lower surface portion which is in close contact with the surface of the hull,
An intermediate portion which is stacked on the lower surface of the lower surface and has a groove formed on the upper surface thereof,
And an upper surface layer on the lower surface of which a groove is formed,
And,
The lower surface portion, the middle portion, and the upper surface portion are assembled by bolting,
Wherein the fixing rods and the fixing rods are formed to penetrate through the through holes formed by the intermediate portions and the grooves formed in the upper surface portions.
The underwater radar noise measuring apparatus according to claim 1,
A plurality of protrusions arranged at the left and right ends of the hull and connected to both ends of the fixing line;
Further comprising a detector for detecting the underwater radiation noise.
The apparatus for measuring underwater radiated noises according to claim 4,
Wherein the connection structure between the protrusions and the fixing line is formed to include a helical clamp so that the length of the fixing line can be adjusted.
2. The apparatus of claim 1,
Wherein the height of the underwater radiation noise measuring device is adjustable.
The underwater radar noise measuring apparatus according to claim 1,
And to transmit the acoustic signal obtained from the hydrophone to the wired line,
Wherein a cable for transmitting an acoustic signal provided in the hydrophone is arranged and fixed along the fixing rod or the fixing line.
A plurality of fixed ropes; A plurality of fixed rods; A plurality of clamps; A plurality of supports formed in the form of a tripod including three legs and a central portion to which the legs are connected, the ends of the legs being connected to a selected one of the clamps; A plurality of hydrophones connected to the center of the support and obtaining underwater radiated noise radiated from the hull; A method of installing an underwater radiated noise measurement apparatus for measuring underwater radiated noise radiated from a hull, the method comprising:
One end of the fixed line is fixed to a protrusion formed on one of the left and right sides of the hull so that the fixed line is arranged in the circumferential direction of the hull and the other end of the fixed line is fixed to the protrusion formed on the other side A fixed line installation step;
A fixed line arranging step in which the fixed line arranging step is repeatedly performed by the number of the fixed lines so that a plurality of the fixed lines are arranged parallel to each other;
A fixing rod mounting step in which the fixing rod is inserted into the clamp inserted in the fixing line so that the fixing rod is disposed in the longitudinal direction of the hull;
Wherein the fixing rod mounting step is repeatedly performed by the number of fixing rods so that the plurality of fixing rods are arranged in parallel with each other;
Adjusting a height of the hydrophone so that the hydrophone is height-adjusted so as to be disposed at a predetermined distance from the hull;
Wherein the method comprises the steps of:
9. The method of claim 8,
The underwater radiated noise measuring apparatus may further include a fixing part for fixing the length of the fixing line, wherein the connection structure between the protrusion part and the fixing line is formed to include a helical clamp,
The installation method of the underwater radiated noise measurement apparatus is characterized in that after the hydrophone height adjustment step, the fixing line connected to the protruding portion on the port side and the starboard side of the hull is further pulled and fixed by the rotation of the helical type clamp, step;
Wherein the method further comprises the steps of:

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