Ship radiated noise measurement system and double-layer cylindrical array measurement device

Abstract

The application discloses a ship radiation noise measuring system and a double-layer cylindrical array measuring device, wherein the cylindrical array measuring device comprises a circular bottom support plate, a circular top support plate, a support pipe, a group of hydrophone oscillators, a ranging transducer, a support base and an electronic cabin; opposite ends of the support pipe are respectively installed in the middle of the bottom support plate and the middle of the top support plate; opposite ends of the hydrophone oscillators are respectively installed in the circumferences of the bottom support plate and the top support plate; the ranging transducer is installed on the top support plate; the support base is installed below the bottom support plate; the electronic cabin is installed below the bottom support plate and is surrounded by the support base; and each hydrophone oscillator is connected to the electronic cabin.

Description

TECHNICAL FIELD

[0001] The present invention relates to an electronic measuring instrument, in particular to a ship radiated noise measuring system and a double-layered cylindrical array measuring device, so that the double-layered cylindrical array measuring device of the present invention serves as a sound sensor in underwater environment for receiving and measuring ship radiated noise. BACKGROUND

[0002] In recent years, with the continuous progress of ship vibration and noise reduction level, the demand for low-noise ship radiated noise measurement is also increasing. At present, the ship noise measuring array system at home and abroad is mostly based on frequency domain constant beam width beam forming technology, using linear array and volume array, which shows narrowband measurement properties, and high and low frequency combined measurement method must be used. Therefore, the measurement system uses a large number of hydrophones, which leads to a large volume of measurement array, which is not conducive to deployment and recovery, and the manufacturing and maintenance costs are high. In addition, narrowband measurement can only use part of the data of the hydrophone for processing each time, which reduces the utilization efficiency of the hydrophone. SUMMARY

[0003] An object of the present invention is to provide a ship radiated noise measuring system and a double-layered cylindrical array measuring device, wherein a part of a group of hydrophone transducers of the double-layered cylindrical array measuring device is located in the inner layer to form inner layer transducers, and another part is located in the outer layer to form outer layer transducers. In this way, the arrangement of the hydrophone transducers is more compact, which significantly reduces the volume of the double-layered cylindrical array measuring device, facilitates deployment and recovery, and is conducive to reducing the construction and maintenance costs of the double-layered cylindrical array measuring device.

[0004] An object of the present invention is to provide a ship radiated noise measuring system and a double-layered cylindrical array measuring device, wherein the hydrophone transducers are arranged equidistantly to provide array gain, ensure distortionless measurement of target signal, and facilitate shortening of the noise measurement period.

[0005] According to an aspect of the present invention, the present invention provides a double-layered cylindrical array measuring device, comprising:

[0006] a circular frame body;

[0007] an electronic cabin; and

[0008] a group of hydrophone transducers, wherein the electronic cabin and the hydrophone transducers are respectively mounted on the frame body, and the hydrophone transducers are respectively connected to the electronic cabin, wherein a part of the hydrophone transducers is located in the inner layer to form inner layer transducers, and another part is located in the outer layer to form outer layer transducers.

[0009] According to one embodiment of the present application, the frame body comprises a circular bottom support plate, a circular top support plate, and a support pipe, the bottom and top of the support pipe are respectively installed in the middle of the bottom support plate and the middle of the top support plate, the electronic cabin is installed on the bottom support plate, and the bottom and top of each hydrophone transducer are respectively installed on the bottom support plate and the top support plate.

[0010] According to one embodiment of the present application, the distance between the central axis of the outer layer transducer and the central axis of the support pipe is twice the distance between the central axis of the inner layer transducer and the central axis of the support pipe, and the distance between the central axis of the inner layer transducer and the central axis of the support pipe is twice the distance between the central axis of two adjacent hydrophone transducers.

[0011] According to one embodiment of the present application, the double-layer cylindrical array measuring device comprises a set of protective strips, the opposite ends of each protective strip are respectively installed on the bottom support plate and the top support plate, and the protective strips are located outside the hydrophone transducers.

[0012] According to one embodiment of the present application, the double-layer cylindrical array measuring device comprises a ranging transducer, the ranging transducer is installed on the top support plate, and the ranging transducer is connected to the electronic cabin.

[0013] According to one embodiment of the present application, the double-layer cylindrical array measuring device comprises a rudder, the rudder is installed on the top of the support pipe, and the rudder is located above the top support plate.

[0014] According to one embodiment of the present application, the hydrophone transducer comprises a carbon fiber rod, a set of hydrophone elements, two installation bases, and a transducer shell, the set of hydrophone elements are arranged along the extension direction of the carbon fiber rod, the opposite ends of the carbon fiber rod are respectively installed with one installation base, the transducer shell is formed by the carbon fiber rod, the hydrophone elements, and the installation bases, so that the transducer shell wraps a part of the carbon fiber rod, the hydrophone elements, and the installation bases, one installation base is installed on the bottom support plate, and the other installation base is installed on the top support plate.

[0015] According to one embodiment of the present application, the bottom support plate, the top support plate, the support pipe, and the protective strips are titanium alloy materials.

[0016] According to one embodiment of the present application, the shape of the electronic cabin is cylindrical, and the central axis of the electronic cabin coincides with the central axis of the support pipe.

[0017] According to another aspect of the present application, the present application further provides a ship radiated noise measuring system, which comprises two double-layer cylindrical array measuring devices, wherein each of the double-layer cylindrical array measuring devices comprises a circular frame body, an electronic cabin and a set of hydrophone transducers, wherein the electronic cabin and the hydrophone transducers are respectively mounted on the frame body, and the hydrophone transducers are respectively connected to the electronic cabin, and wherein a part of the hydrophone transducers are located in the inner layer to form inner layer transducers, and another part of the hydrophone transducers are located in the outer layer to form outer layer transducers. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of a double-layer cylindrical array measuring device according to a preferred embodiment of the present application.

[0019] Figure 2 is another perspective view of the double-layer cylindrical array measuring device according to the preferred embodiment of the present application.

[0020] Figure 3 is an exploded view of the double-layer cylindrical array measuring device according to the preferred embodiment of the present application.

[0021] Figure 4 is another exploded view of the double-layer cylindrical array measuring device according to the preferred embodiment of the present application.

[0022] Figure 5 is a sectional view of a hydrophone transducer of the double-layer cylindrical array measuring device according to the preferred embodiment of the present application.

[0023] Figure 6 is a perspective view of an electronic cabin of the double-layer cylindrical array measuring device according to the preferred embodiment of the present application.

[0024] Figure 7 is another perspective view of the electronic cabin of the double-layer cylindrical array measuring device according to the preferred embodiment of the present application.

[0025] Figure 8 is an exploded view of the electronic cabin of the double-layer cylindrical array measuring device according to the preferred embodiment of the present application.

[0026] Figure 9 is another exploded view of the electronic cabin of the double-layer cylindrical array measuring device according to the preferred embodiment of the present application.

[0027] Figure 10 is a sectional view of the electronic cabin of the double-layer cylindrical array measuring device according to the preferred embodiment of the present application.

[0028] Figure 11 is a perspective view of an electronic assembly of the electronics compartment of the dual-layer cylindrical array measurement device according to the above-described preferred embodiment of the present application, from one viewing angle.

[0029] Figure 12 is a perspective view of the electronic assembly of the electronics compartment of the dual-layer cylindrical array measurement device according to the above-described preferred embodiment of the present application, from another viewing angle.

[0030] Figure 13 is an exploded view of the electronic assembly of the electronics compartment of the dual-layer cylindrical array measurement device according to the above-described preferred embodiment of the present application, from one viewing angle.

[0031] Figure 14 is an exploded view of the electronic assembly of the electronics compartment of the dual-layer cylindrical array measurement device according to the above-described preferred embodiment of the present application, from another viewing angle.

[0032] Figure 15 is an exploded view of a partial structure of the electronics compartment of the dual-layer cylindrical array measurement device according to the above-described preferred embodiment of the present application, from one viewing angle.

[0033] Figure 16 is an exploded view of the above-described partial structure of the electronics compartment of the dual-layer cylindrical array measurement device according to the above-described preferred embodiment of the present application, from another viewing angle.

[0034] Figure 17 is a schematic diagram of the operation of the electronics compartment of the dual-layer cylindrical array measurement device according to the above-described preferred embodiment of the present application. DETAILED DESCRIPTION

[0035] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The application is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.

[0036] And, in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application; secondly, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, the term "one" cannot be understood as a limitation of the number.

[0037] Reference is made to the drawings accompanying the specification of the present application Figures 1 to 17 A double-layer cylindrical array measuring device 100 according to a preferred embodiment of the present application will be disclosed and described in the following description, wherein the double-layer cylindrical array measuring device 100 comprises a circular frame body 10, an electronic cabin 20 and a group of hydrophone transducers 30, the electronic cabin 20 and the hydrophone transducers 30 are respectively mounted on the frame body 10, and the hydrophone transducers 30 are respectively connected to the electronic cabin 20, the sound signals collected by the hydrophone transducers 30 are sent to the electronic cabin 20 for processing to measure the ship radiated noise.

[0038] In the double-layer cylindrical array measuring device 100 of the present application, part of the hydrophone transducers 30 are located in the inner layer to form inner layer transducers 30a, and the other part are located in the outer layer to form outer layer transducers 30b, in this way, the arrangement of the hydrophone transducers 30 is more compact, which significantly reduces the volume of the double-layer cylindrical array measuring device 100, facilitates deployment and recovery, and is conducive to reducing the construction and maintenance cost of the double-layer cylindrical array measuring device 100.

[0039] For example, in the accompanying drawings Figures 1 to 17In the specific example of the double-layer cylindrical array measuring device 100 shown, the number of hydrophone elements 30 is eighteen, of which six hydrophone elements 30 are located in the inner layer to form the inner layer elements 30a, and twelve hydrophone elements 30 are located in the outer layer to form the outer layer elements 30b. In other words, the double-layer cylindrical array measuring device 100 includes six inner layer elements 30a and twelve outer layer elements 30b, which are located outside the inner layer elements 30a. In this way, the arrangement of the hydrophone elements 30 is more compact, which significantly reduces the volume of the double-layer cylindrical array measuring device 100, facilitates deployment and recovery, and helps reduce the construction and maintenance costs of the double-layer cylindrical array measuring device 100.

[0040] Further, the frame 10 includes a bottom support plate 11, a top support plate 12, and a support pipe 13. The bottom support plate 11 and the top support plate 12 are both circular. The bottom of the support pipe 13 is mounted to the middle of the bottom support plate 11, and the top of the support pipe 13 is mounted to the middle of the top support plate 12, so that the top support plate 12 is suspended above the bottom support plate 11 by the support pipe 13. That is, the support pipe 13 is in a vertical state, and the positions of the bottom support plate 11 and the top support plate 12 correspond in the height direction. The electronic cabin 20 is mounted to the bottom support plate 11 and located below the bottom support plate 11. The bottom of each hydrophone element 30 is mounted to the bottom support plate 11, and the top of each hydrophone element 30 is mounted to the top support plate 12, so that the hydrophone elements 30 are mounted between the bottom support plate 11 and the top support plate 12 of the frame 10.

[0041] Preferably, the bottom of the support pipe 13 is rigidly mounted to the bottom support plate 11, and the top of the support pipe 13 is rigidly mounted to the top support plate 12, so that the frame 10 can have a stable structure, ensuring that the hydrophone elements 30 are more sensitive and helping to meet the measurement requirements for low ship radiated noise. For example, in a specific example of the double-layer cylindrical array measuring device 100, the bottom of the support pipe 13 can be welded to the bottom support plate 11, so that the bottom of the support pipe 13 is rigidly mounted to the bottom support plate 11, and the top of the support pipe 13 can be welded to the top support plate 12, so that the top of the support pipe 13 is rigidly mounted to the top support plate 12.

[0042] With reference to the accompanying drawings Figures 1 to 4The bottom support plate 11 comprises a bottom center plate 111, a bottom outer ring plate 112, and a plurality of bottom spokes 113. The bottom outer ring plate 112 surrounds the outside of the bottom center plate 111. The opposite ends of each bottom spoke 113 are connected to the bottom center plate 111 and the bottom outer ring plate 112, respectively. Preferably, the bottom center plate 111, the bottom outer ring plate 112, and each bottom spoke 113 of the bottom support plate 11 are integrated. Alternatively, the opposite ends of each bottom spoke 113 are mounted to the bottom center plate 111 and the bottom outer ring plate 112, respectively.

[0043] Correspondingly, the top support plate 12 comprises a top center plate 121, a top outer ring plate 122, and a plurality of top spokes 123. The top outer ring plate 122 surrounds the outside of the top center plate 121. The opposite ends of each top spoke 123 are connected to the top center plate 121 and the top outer ring plate 122, respectively. Preferably, the top center plate 121, the top outer ring plate 122, and each top spoke 123 of the top support plate 12 are integrated. Alternatively, the opposite ends of each top spoke 123 are mounted to the top center plate 121 and the top outer ring plate 122, respectively.

[0044] The bottom of the support tube 13 is rigidly mounted to the bottom center plate 111, and the central axis of the support tube 13 coincides with the central axis of the bottom center plate 111. The top of the support tube 13 is rigidly mounted to the top center plate 121, and the central axis of the support tube 13 coincides with the central axis of the top center plate 121. The positions of each bottom spoke 113 of the bottom support plate 11 and each top spoke 123 of the top support plate 12 correspond to each other. The bottom of the hydrophone transducer 30 is mounted to the bottom spoke 113 of the bottom support plate 11, and the bottom of the hydrophone transducer 30 is mounted to the top spoke 123 of the top support plate 12.

[0045] In the accompanying drawings Figures 1 to 17In the specific example of the double-layer cylindrical array measuring device 100 shown in the figure, the number of the bottom spokes 113 of the bottom support plate 11 and the number of the top spokes 123 of the top support plate 12 are both twelve, the opposite ends of each of the inner layer transducers 30a are respectively mounted on the odd-numbered bottom spokes 113 and the odd-numbered top spokes 123, and the opposite ends of each of the outer layer transducers 30b are respectively mounted on each of the bottom spokes 113 and each of the top spokes 123. That is, the opposite ends of the first inner layer transducer 30a are respectively mounted on the first bottom spoke 113 and the first top spoke 123, the opposite ends of the second inner layer transducer 30a are respectively mounted on the third bottom spoke 113 and the third top spoke 123, the opposite ends of the third inner layer transducer 30a are respectively mounted on the fifth bottom spoke 113 and the fifth top spoke 123, the opposite ends of the fourth inner layer transducer 30a are respectively mounted on the seventh bottom spoke 113 and the seventh top spoke 123, the opposite ends of the fifth inner layer transducer 30a are respectively mounted on the ninth bottom spoke 113 and the ninth top spoke 123, and the opposite ends of the sixth inner layer transducer 30a are respectively mounted on the eleventh bottom spoke 113 and the eleventh top spoke 123.

[0046] Preferably, the distance between the central axis of the outer layer transducer 30b and the central axis of the support tube 13 is twice the distance between the central axis of the inner layer transducer 30a and the central axis of the support tube 13, and the distance between the central axes of two adjacent hydrophone transducers 30 is twice the distance between the central axes of two adjacent inner layer transducers 30a, so that the hydrophone transducers 30 are arranged equidistantly to provide array gain, ensure distortionless measurement of target signals, and facilitate shortening of the noise measurement period and efficient measurement of ship radiated noise. Figures 1 to 17 In the specific example of the double-layer cylindrical array measuring device 100 shown in the figure, the distance between the central axis of the outer layer transducer 30b and the support tube 13 is 0.8 m, i.e., the diameter of the circle on which the central axes of the twelve outer layer transducers 30b lie is 1.6 m, and the distance between the central axis of the inner layer transducer 30a and the support tube 13 is 0.4 m, i.e., the diameter of the circle on which the central axes of the six inner layer transducers 30a lie is 0.8 m, and the distance between the central axes of two adjacent hydrophone transducers 30 is 0.4 m.

[0047] Preferably, the top of the support tube 13 has a hook 131, through which the crane can hoist the double-layer cylindrical array measuring device 100 into the water.

[0048] Reference is made to the accompanying drawings that show Figure 5 The hydrophone transducer 30 comprises a carbon fiber rod 31, a set of hydrophone elements 32, two mounting bases 33, and a transducer shell 34. The set of hydrophone elements 32 are arranged along the extension direction of the carbon fiber rod 31. The opposite ends of the carbon fiber rod 31 are respectively provided with one of the mounting bases 33. The transducer shell 34 is formed on the carbon fiber rod 31, the hydrophone elements 32, and the mounting bases 33, so that the transducer shell 34 wraps a part of the carbon fiber rod 31, the hydrophone elements 32, and the mounting bases 33. The material of the transducer shell 34 can be polyurethane. After the carbon fiber rod 31, the hydrophone elements 32, and the mounting bases 33 are placed in a mold, polyurethane material is poured into the mold. After the polyurethane material is solidified, the mold is removed, forming the transducer shell 34, so that the transducer shell 34 can wrap a part of the carbon fiber rod 31, the hydrophone elements 32, and the mounting bases 33.

[0049] Reference is made to the accompanying drawings that show Figures 1 to 17 In this specific example of the double-layer cylindrical array measuring device 100 of the present application shown in the accompanying drawings, the number of the hydrophone elements 32 can be four. The four hydrophone elements 32 are respectively sleeved on the carbon fiber rod 31, so that the hydrophone elements 32 are arranged along the extension direction of the carbon fiber rod 31. The four hydrophone elements 32 of the hydrophone transducer 30 can be connected to the electronic cabin 20 using a 12-core shielded water-tight cable 36. Reference is made to the accompanying drawings that show Figure 5 One of the two mounting bases 33 of the hydrophone transducer 30 has a cable hole 331 for the 12-core shielded water-tight cable 36 to pass out, so as to be connected to the electronic cabin 20 subsequently.

[0050] Reference is made to the accompanying drawings that show Figure 3 and Figure 4 The bottom spoke 113 of the bottom support plate 11 has at least one bottom mounting slot 1131, and the top spoke 123 of the top support plate 12 has at least one top mounting slot 1231. One of the mounting bases 33 of the hydrophone transducer 30 is mounted in the bottom mounting slot 1131 of the bottom spoke 113, and the other mounting base 33 is mounted in the top mounting slot 1231 of the top spoke 123. In this way, the opposite ends of the hydrophone transducer 30 are reliably mounted on the bottom support plate 11 and the top support plate 12.

[0051] It can be understood that, in order to further increase the reliability of the mounting relationship between the opposite ends of the hydrophone vibrator 30 and the bottom support plate 11 and the top support plate 12, glue can be used to bond the mounting base 33 and the bottom spoke 113 and to bond the mounting base 33 and the top spoke 123, or screws can be used to lock the mounting base 33 and the bottom spoke 113 and to lock the mounting base 33 and the top spoke 123.

[0052] With reference to the accompanying drawings Figures 1 to 4 , the double-layer cylindrical array measuring device 100 further comprises a set of protective strips 40, the opposite ends of each protective strip 40 are respectively mounted on the bottom support plate 11 and the top support plate 12, and the protective strips 40 are located outside the hydrophone vibrator 30, that is, the protective strips 40 are located outside the outer layer vibrator 30b. By arranging the protective strips 40 between the bottom support plate 11 and the top support plate 12 and locating the protective strips 40 outside the outer layer vibrator 30b, not only can the structure of the frame 10 be more stable, but also the hydrophone vibrator 30 can be prevented from being directly collided during the measurement, thereby ensuring the reliability and safety of the double-layer cylindrical array measuring device 100.

[0053] It is worth mentioning that the specific way of mounting the opposite ends of the protective strips 40 on the bottom support plate 11 and the top support plate 12 is not limited in the double-layer cylindrical array measuring device 100 of the present application. For example, in the specific example of the double-layer cylindrical array measuring device 100 of the present application shown in the accompanying drawings Figures 1 to 17 , screws can be used to lock the bottom of the protective strips 40 to the bottom outer ring plate 112 of the bottom support plate 11 and to lock the top of the protective strips 40 to the top outer ring plate 122 of the top support plate 12, so that the opposite ends of the protective strips 40 are respectively mounted on the bottom support plate 11 and the top support plate 12, and the protective strips 40 are located outside the outer layer vibrator 30b.

[0054] Preferably, the bottom support plate 11, the top support plate 12, the support tube 13 and the protective strips 40 are made of titanium alloy material to meet the non-magnetic requirement of the double-layer cylindrical array measuring device 100.

[0055] With reference to the accompanying drawings Figures 1 to 4The double-layer cylindrical array measuring device 100 includes a rudder 50, which is installed on the top of the support pipe 13 and above the top support plate 12. The rudder 50 is used to control the posture of the double-layer cylindrical array measuring device 100 under water. Preferably, the rudder 50 is made of titanium alloy to meet the non-magnetic requirement of the double-layer cylindrical array measuring device 100.

[0056] With reference to the accompanying drawings Figures 1 to 4 The double-layer cylindrical array measuring device 100 includes a ranging transducer (i.e., distance sensor) 60, which is installed on the top support plate 12 and connected to the electronic cabin 20. The ranging transducer 60 can be used to transmit and receive ranging pulses to locate objects in the surrounding environment of the double-layer cylindrical array measuring device 100. Specifically, screws can be used to lock the ranging transducer 60 to the top spoke 123 of the top support plate 12 to install the ranging transducer 60 on the top support plate 12.

[0057] With reference to the accompanying drawings Figures 1 to 4 The double-layer cylindrical array measuring device 100 includes a support base 70, which is installed below the bottom support plate 11 and surrounds the electronic cabin 20. After the double-layer cylindrical array measuring device 100 is placed in water, the support base 70 is used to support the entire double-layer cylindrical array measuring device 100 and can avoid the electronic cabin 20 from being touched by underwater objects (e.g., reefs) to ensure the installation of the electronic cabin 20. Specifically, screws can be used to install the support base 70 on the bottom support plate 11. Preferably, the support base 70 is made of titanium alloy to meet the non-magnetic requirement of the double-layer cylindrical array measuring device 100.

[0058] With reference to the accompanying drawings Figures 6 to 9 The electronic cabin 20 can be cylindrical in shape, and the center axis of the electronic cabin 20 coincides with the center axis of the support pipe 13. Specifically, with reference to the accompanying drawings Figure 2 The electronic cabin 20 includes a cabin body 21, a cabin cover 22, a measuring transducer 23, an electronic assembly 24, a sacrificial anode 25, at least one watertight terminal 26, and a fitting 27.

[0059] The cabin body 21 is cylindrical, having a cabin cavity 211, a cabin body groove 212 formed on the inner wall of the cabin body 21 near the cavity opening of the cabin cavity 211, and a threading hole 213 extending from the cabin body groove 212 to the outer surface of the cabin body 21, i.e., the threading hole 213 is communicated with the cabin body groove 212. Preferably, the threading hole 213 of the cabin body 21 extends along the width direction of the cabin body 21 to facilitate subsequent threading of the nylon line. Referring to the accompanying drawings, Figure 4 and Figure 10 The rack body 10 includes a suspension assembly 14 mounted below the bottom center plate 111 of the bottom support plate 11, and the bottom of the cabin body 21 is mounted on the suspension assembly 14 to mount the electronic cabin 20 at the bottom of the rack body 10. Specifically, the suspension assembly 14 includes a suspension cylinder 141 sleeved on the bottom of the cabin body 21 to mount the cabin body 21 on the suspension assembly 14, and a set of suspension screws 142 locking the suspension cylinder 141 below the bottom center plate 111 to mount the suspension assembly 14 below the bottom center plate 111.

[0060] The cabin cover 22 has a plug-in part 221 and a cabin cover groove 222 surrounding the plug-in part 221, and the measurement transducer 23, the electronic assembly 24, the sacrificial anode 25, and the watertight terminal 26 are arranged on the cabin cover 22, respectively. The measurement transducer 23 and the watertight terminal 26 are connected to the electronic assembly 24, respectively, and the measurement transducer 23, the sacrificial anode 25, and the watertight terminal 26 are all exposed to the outer surface of the cabin cover 22, so that the measurement transducer 23 and the sacrificial anode 25 can be directly contacted with water, and a water-tight cable can be connected to the electronic cabin 20 through the watertight terminal 26.

[0061] The hatch cover 22 is installed on the cabin body 21 in a manner that the electronic assembly 24 is housed in the cabin cavity 211 of the cabin body 21 and the insertion part 221 of the hatch cover 22 is inserted into the cabin cavity 211 of the cabin body 21, the hatch cover 22 closes the cavity opening of the cabin cavity 211 of the cabin body 21, the position of the hatch cover groove 222 of the hatch cover 22 corresponds to the position of the cabin body groove 212 of the cabin body 21. The nylon thread is inserted into the cabin body groove 212 of the cabin body 21 and the hatch cover groove 222 of the hatch cover 22 through the threading hole 213 of the cabin body 21, and forms the assembly part 27, the outer side of the assembly part 27 is located in the cabin body groove 212 of the cabin body 21, the inner side of the assembly part 27 is located in the hatch cover groove 222 of the hatch cover 22, thus the assembly part 27 can reliably assemble the cabin body 21 and the hatch cover 22, and ensures that the hatch cover 22 closes the cavity opening of the cabin cavity 211 of the cabin body 21, so that the cabin cavity 211 of the cabin body 21 forms a water-tight environment, and the electronic assembly 24 is suspended in the water-tight environment by the hatch cover 22.

[0062] It can be understood that, in order to increase the water-tightness of the installation position of the hatch cover 22 and the cabin body 21, a sealing ring 200 can be clamped between the insertion part 221 of the hatch cover 22 and the cabin body 21, as shown in FIG. 2B. Figure 10 .

[0063] In the double-layer cylindrical array measuring device 100 of the present application, the base materials of the cabin body 21 and the cabin cover 22 are copper or aluminum, and in order to improve the corrosion resistance of the cabin body 21 and the cabin cover 22, the surfaces of the cabin body 21 and the cabin cover 22 are subjected to oxidation treatment to form an oxide film. The inner surface of the cabin body 21 has at least one cabin body exposed area 214 exposed at the bottom of the cabin cavity 211 of the cabin body 21, the inner surface of the cabin cover 22 has at least one first cabin cover exposed area 223, the outer surface of the cabin cover 22 has a second cabin cover exposed area 224, the electronic assembly 24 is installed on the cabin cover 22, and the electronic assembly 24 is connected to the base material of the cabin cover 22 through the first cabin cover exposed area 223 of the cabin cover 22, the sacrificial anode 25 is installed on the cabin cover 22 in a manner that the sacrificial anode 25 covers the second cabin cover exposed area 224, and the sacrificial anode 25 is connected to the base material of the cabin cover 22 through the second cabin cover exposed area 224. When the electronic cabin 20 is assembled, after the cabin cover 22 suspends the electronic assembly 24 in the cabin cavity 211 of the cabin body 21, the electronic assembly 24 is connected to the base material of the cabin body 21 through the cabin exposed area 214. Thus, the base materials of the cabin body 21 and the cabin cover 22 are connected to the electronic assembly 24, and thus, the cathodic protection of the cabin body 21 and the cabin cover 22 can be achieved by installing the sacrificial anode 25 on the cabin cover 22, which is conducive to simplifying the structure of the electronic cabin 20, thereby not only reducing the cost of the electronic cabin 20, but also ensuring the reliability of the electronic cabin 20.

[0064] It can be understood that, since the sacrificial anode 25 covers the second cabin cover exposed area 224 of the cabin cover 22, the second cabin cover exposed area 224 of the cabin cover 22 is not in contact with water, so as to avoid affecting the corrosion resistance of the cabin cover 22.

[0065] Reference is made to the accompanying drawings Figure 15 and Figures 1 to 17, the second hatch bare area 224 of the hatch 22 is formed at the bottom of the sunken groove 225 of the hatch 22, the shape and size of the sunken groove 225 match the shape and size of the sacrificial anode 25, after the sacrificial anode 25 is installed in the sunken groove 225 of the hatch 22, on the one hand, the double-layer cylindrical array measuring device 100 can avoid the sacrificial anode 25 protruding from the hatch 22, on the other hand, the sacrificial anode 25 can be in conduction with the base material of the hatch 22 to realize the cathodic protection of the tank body 21 and the hatch 22. In a specific example of the double-layer cylindrical array measuring device 100 of the present application, a screw can be used to lock the sacrificial anode 25 to the hatch 22.

[0066] It is worth mentioning that the specific way of forming the tank body bare area 214 in the tank body 21 and the first hatch bare area 223 and the second hatch bare area 224 in the hatch 22 is not limited in the double-layer cylindrical array measuring device 100 of the present application. For example, in the specific example of the double-layer cylindrical array measuring device 100 of the present application shown in the accompanying drawings, a part of the oxide film on the inner surface of the tank body 21 can be removed by laser engraving to form the tank body bare area 214, a part of the oxide film on the inner surface of the hatch 22 can be removed to form the first hatch bare area 223, and a part of the oxide film on the bottom of the sunken groove 225 of the hatch 22 can be removed to form the second hatch bare area 224. Figure 16

[0067] Referring to the accompanying drawings, Figure 16 , the hatch 22 has a first cover hole 226 and at least one second cover hole 227, the first cover hole 226 and the second cover hole 227 are arranged adjacent to each other, the cable of the measuring transducer 23 passes through the first cover hole 226 of the hatch 22 and is connected to the electronic assembly 24, the threaded end of the screw passes through the second cover hole 227 of the hatch 22 and is screwed to the measuring transducer 23 to install the measuring transducer 23 to the hatch 22. It can be understood that in order to increase the water tightness of the installation position of the hatch 22 and the measuring transducer 23, one of the sealing rings 200 can be clamped between the hatch 22 and the measuring transducer 23.

[0068] Continuing to refer to the accompanying drawings, Figure 10 ​The hatch 22 has at least one terminal hole 228, and one end of the water-tight terminal 26 is water-tightly installed in the terminal hole 228 of the hatch 22 to install the water-tight terminal 26 on the hatch 22. Preferably, the number of the terminal holes 228 of the hatch 22 is two, and the number of the water-tight terminals 26 is also two, one end of one of the water-tight terminals 26 is water-tightly installed in one of the terminal holes 228 of the hatch 22, and one end of the other water-tight terminal 26 is water-tightly installed in the other terminal hole 228 of the hatch 22. It can be understood that the inner end of the water-tight terminal 26 is connected to the electronic assembly 24.

[0069] Further, referring to the accompanying drawings Figures 12 to 14 , Figures 1 to 17 The electronic cabin 20 comprises an elastic conductive part 28, which is arranged at the bottom of the electronic assembly 24 and is in conduction with the electronic assembly 24. After the electronic assembly 24 is suspended by the hatch 22 in the cabin cavity 211 of the cabin body 21, the elastic conductive part 28 is pressed by the electronic assembly 24 towards the bottom of the cabin body 21 and contacts the exposed area 214 of the cabin body 21, so that the elastic conductive part 28 connects the base material of the cabin body 21 and the electronic assembly 24 in conduction, and the electronic assembly 24 is in conduction with the base material of the cabin body 21 through the exposed area 214, so that the cathodic protection of the cabin body 21 can be realized even without arranging the sacrificial anode 25 on the cabin body 21.

[0070] In the accompanying drawings Figures 10 to 14 In this specific example of the double-layer cylindrical array measuring device 100 of the present application, the elastic conductive part 28 is a conductive sponge, which can be deformed by the electronic assembly 24 and the cabin body 21, so that the elastic conductive part 28 not only connects the electronic assembly 24 and the base material of the cabin body 21 in conduction, but also provides elastic support for the electronic assembly 24 to reduce the adverse effects of the vibration of the cabin body 21 on the electronic assembly 24. Alternatively, in other optional examples of the double-layer cylindrical array measuring device 100 of the present application, the elastic conductive part 28 can be a metal spring.

[0071] Further, referring to the accompanying drawings Figures 11 to 14 The electronic cabin 20 comprises a pair of elastic supports 29, which are arranged at opposite sides of the electronic assembly 24 and abut against the inner wall of the cabin body 21. When the electronic cabin 20 is affected by external force and the cabin body 21 vibrates, the elastic conductive part 28 and the two elastic supports 29 can absorb the vibration to reduce the adverse effects of the vibration on the electronic assembly 24.

[0072] Specifically, the elastic support 29 is formed by bending a metal sheet, which comprises a support section 291 and a locking section 292 extending obliquely from one end of the support section 291, and a screw can be used to lock the locking section 292 to the bottom end of the electronic component 24, i.e. the end of the electronic component 24 away from the cabin 21, so as to arrange the elastic support 29 on the electronic component 24, and the end of the support section 291 away from the locking section 292 has a gap with the electronic component 24. When the electronic component 24 is installed in the cabin cavity 211 of the cabin 21, the cabin 21 presses the end of the support section 291 away from the locking section 292 towards the electronic component 24, so that the elastic support 29 is deformed, and thus the elastic support 29 can elastically support the electronic component 24 and the cabin 21, and thus the elastic conductive part 28 and the two elastic supports 29 cooperate with each other, which not only can avoid the electronic component 24 from shaking in the cabin cavity 211 of the cabin 21, but also can absorb the vibration when the electronic cabin 20 is affected by external force and the cabin 21 is vibrated, so as to reduce the adverse effects of the vibration on the electronic component 24. Preferably, the elastic support 29 comprises a bending section 293, which is curvedly extended from the end of the support section 291 away from the locking section 292, and the bending section 293 is located on the inner side of the support section 291, so that the end of the elastic support 29 away from the locking section 292 is smoother, so as to avoid the elastic support 29 from scratching the inner wall of the cabin 21, thereby avoiding the oxide layer of the inner wall of the cabin 21 from being damaged.

[0073] Reference is made to the accompanying drawings Figures 1 to 17The electronic assembly 24 includes a conductive plate support 241, an adapter plate 242, and at least one main circuit board 243. The plate support 241 includes a transverse extension 2411 and a longitudinal extension 2412 integrally extended downward from the middle of the transverse extension 2411. The adapter plate 242 is locked on the top of the transverse extension 2411, for example, screws can be used to lock the adapter plate 242 on the top of the transverse extension 2411. The main circuit board 243 is locked on the side of the longitudinal extension 2412, for example, screws can be used to lock the main circuit board 243 on the side of the longitudinal extension 2412. The main circuit board 243 and the adapter plate 242 are conductively connected. Screws are used to lock the transverse extension 2411 on the hatch cover 22, and the transverse extension 2411 is in contact with the first hatch cover exposed area 223 of the hatch cover 22, so that the plate support 241 and the base material of the hatch cover 22 are conductively connected. It can be understood that the hatch cover 22 has a plurality of support columns 229 for locking the transverse extension 2411, so that the transverse extension 2411 and the hatch cover 22 can have a gap for accommodating the adapter plate 242, avoiding the adapter plate 242 from touching the hatch cover 22, wherein the first hatch cover exposed area 223 of the hatch cover 22 is formed on the end face of the support column 229.

[0074] Preferably, in the attached Figure 10 In this specific example of the double-layer cylindrical array measurement device 100 of the present application, the number of main circuit boards 243 of the electronic assembly 24 is two, and one main circuit board 243 is locked on each side of the longitudinal extension 2412 of the plate support 241. The main circuit board 243 can be designed with a timekeeping module, a collection module, an interface module, a shielding module, and a transmission module. Alternatively, in other examples of the double-layer cylindrical array measurement device 100 of the present application, the number of main circuit boards 243 of the electronic assembly 24 can be five, and the five main circuit boards 243 can be a timekeeping module, a collection module, an interface module (interface board), a shielding module, and a transmission module (transmission board), respectively. The timekeeping module is provided with a high-precision atomic clock for providing accurate and stable time base pulses to ensure timekeeping accuracy. The collection module is used for conditioning, converting, and collecting analog signal data. The interface module mainly provides various low-voltage power supplies and various signal interfaces. The shielding module is used to prevent mutual electromagnetic interference of various modules in the electronic cabin 20. The transmission module is realized by an FPGA chip and is used to complete data integration and opening, provide gigabit optical ports and gigabit electrical ports. It can be understood that the cable of the measurement transducer 23 and the inner end of the watertight terminal 26 can be connected to the adapter plate 242.

[0075] The electronic assembly 24 further comprises a posture instrument 244, which can be attached to the main circuit board 243, for measuring the inclined posture of the double-layer cylindrical array measuring device 100. Preferably, the posture instrument 244 can be a magnetic compass. Alternatively, the posture instrument 244 can also be installed on the transversely extending frame 2411 or the longitudinally extending frame 2412 of the board support 241.

[0076] The electronic assembly 24 further comprises a conductive battery support 245, a battery clamping plate 246, and a battery 247. The battery support 245 comprises a main support plate 2451, two support arms 2452 symmetrically arranged on opposite sides of the main support plate 2451, and a bracket arm 2453 arranged at the bottom of the main support plate 2451 to form a battery cavity 2454 between the main support plate 2451, the two support arms 2452, and the bracket arm 2453. In a specific example of the present application, a metal plate or an alloy plate can be bent along a predetermined position to form the main support plate 2451, the support arms 2452, and the bracket arm 2453. The battery 247 is received in the battery cavity 2454 of the battery support 245, and the battery 247 is connected to the adapter board 242. The battery clamping plate 246 is installed on the two support arms 2452 of the battery support 245 by clamping the battery 247 between the main support plate 2451 and the battery clamping plate 246 at opposite ends of the battery clamping plate 246. The two support arms 2452 of the battery support 245 are respectively locked on opposite sides of the longitudinally extending frame 2412 of the board support 241, and the board support 241 and the battery support 245 are conductively connected. The elastic conductive part 28 is arranged on the bracket arm 2453 of the battery support 245, and the elastic conductive part 28 and the bracket arm 2453 are conductively connected. The locking section 292 of the elastic support 29 is locked on the support arm 2452 of the battery support 245.

[0077] Reference is made to the accompanying drawings Figure 11 , Figure 15 and Figure 13The electronic assembly 24 further comprises an electric quantity indicating assembly 248, which comprises a multi-color indicating lamp 2481 and a light guide column 2482. The multi-color indicating lamp 2481 is attached to the adapter plate 242 and indicates the electric quantity of the battery 247 by displaying light of different colors. The hatch 22 has a third hatch hole 2210. After the light guide column 2482 is inserted into the third hatch hole 2210 of the hatch 22, a snap spring 220 is used to clamp the inner end of the light guide column 2482, so that the light guide column 2482 is water-tightly installed in the third hatch hole 2210 of the hatch 22. The light guide column 2482 is located directly above the multi-color indicating lamp 2481 and is used to guide the light emitted by the multi-color indicating lamp 2481 for viewing. It can be connected that one of the two water-tight terminals 26 of the electronic chamber 20 can be a charging terminal. When the electric quantity of the battery 247 is insufficient, external electric energy can be supplemented to the battery 247 through this water-tight terminal 26.

[0078] The electronic chamber 20 further comprises a mechanical sensor 210, which is installed on the hatch 22 and connected to the adapter plate 242. The mechanical sensor 210 is used to detect the water pressure at the location of the double-layer cylindrical array measuring device 100 to determine the depth of the location of the double-layer cylindrical array measuring device 100. Specifically, the hatch 22 has a hatch groove 22101 and a fourth hatch hole 22102 extending downward from the hatch groove 22101. The mechanical sensor 210 is water-tightly installed in the hatch groove 22101 of the hatch 22 to avoid the mechanical sensor 210 protruding from the hatch 22. The cable of the mechanical sensor 210 extends to and is connected to the adapter plate 242 through the fourth hatch hole 22102 of the hatch 22.

[0079] Preferably, the hatch 22 has a clamping groove 22103 formed in the middle section of the hatch groove 22101. The outer side of the snap spring 220 is clamped into the clamping groove 22103 of the hatch 22, and the inner side extends to the top surface of the mechanical sensor 210, so that the mechanical sensor 210 is reliably retained in the hatch groove 22101 of the hatch 22 by the snap spring 220.

[0080] The electronic cabin 20 further comprises a small cover 230 having a plurality of small cover perforations 2301, the small cover 230 is installed in the cover groove 22101 of the cabin cover 22 for hiding the mechanical sensor 210. After the double-layer cylindrical array measuring device 100 enters water, water can reach the mechanical sensor 210 through the small cover perforations 2301 of the small cover 230 to allow the mechanical sensor 210 to detect the water pressure at the position of the double-layer cylindrical array measuring device 100.

[0081] When it is required to measure the radiation noise of a ship, the double-layer cylindrical array measuring device 100 of the present application can be hung in water by the hook 131 of the support pipe 13. Before the double-layer cylindrical array measuring device 100 works, a time-keeping module such as a handheld GPS is connected with the time-keeping module of the electronic cabin 20. For example, the time-keeping module can be connected with the time-keeping module of the electronic cabin 20 through a water-tight connector and the water-tight terminal 26, receives satellite model, and transmits time-keeping information (year, month, day, second) and 1PPS pulse to the time-keeping module of the electronic cabin 20. After time-keeping is completed, the time-keeping module is disconnected, and the time-keeping module enters a time-keeping working state. A dry-end device can be connected with the electronic cabin 20 through a water-tight connector and the water-tight terminal 26. During work, multi-path hydrophone array element signals, synchronous ranging signals and other signals are transmitted to a collection module through an interface module. The collection module contains five ADC 16-channel analog signal conditioning and collection units, transmits the analog signals transmitted by the interface module after conditioning and A / D conversion to a transmission module. The transmission module sends a request signal (pulse signal) to the time-keeping module when required, and the time-keeping module immediately requests the time at the falling edge of the signal (including year, month, day, second and below, accurate to microseconds) to send 32 bytes to the requester, and packs and combines it with the signals of the collection module on the ship bottom, the signals of the attitude instrument 244 and other signals, and transmits them to the dry-end device through a gigabit optical-electricity port to complete the collection and transmission of the entire data. The transmission can also receive control instructions through the optical-electricity port to adjust the setting parameters of the electronic cabin 20.

[0082] Attached Figure 14 The results of processing the environmental experimental data of a single double-layer cylindrical array measuring device 100 on a lake are shown. As can be seen from the figure, the array gain above 200Hz increases with the increase of frequency, and the mutual power spectrum processing array gain is about 5dB higher than the self-power spectrum processing array gain at 1kHz.

[0083] Attached ​The results of processing the environmental experimental data on the lake by two double-layer cylindrical array measuring devices 100 are shown. When the two double-layer cylindrical array measuring devices 100 are combined, a ship radiation noise measuring system is formed. By calculating the cross-correlation coefficient of the double-array combined processing and observing the cross-correlation peak, three noise sources (gasoline engine noise, engine room noise, and propeller noise) on the ship can be distinguished in the spatial scale. That is, the ship radiation noise measuring system further comprises two double-layer cylindrical array measuring devices 100. The two double-layer cylindrical array measuring devices 100 can be positioned relative to each other by the ranging of the ranging transducer 60.

[0084] Those skilled in the art will understand that the above description and the embodiments of the application shown in the drawings are only examples and do not limit the application. The purpose of the application has been fully and effectively achieved. The function and structural principles of the application have been demonstrated and described in the embodiments, and the implementation of the application can be any modification or modification without departing from the principles.

Claims

1. A double-layer cylindrical array measuring device, characterized in that, include: A circular frame, wherein the frame has a suspension assembly; Electronic cabin; as well as A set of hydrophone transducers, wherein the electronics compartment and the hydrophone transducers are respectively mounted on the frame, and the hydrophone transducers are respectively connected to the electronics compartment, wherein a portion of the hydrophone transducers are located in the inner layer to form an inner layer transducer, and another portion is located in the outer layer to form an outer layer transducer, wherein the electronics compartment includes a compartment body, a compartment cover, a measuring transducer, electronic components, a sacrificial anode, a watertight terminal, and a sealing ring, and the bottom of the compartment body is mounted on the suspension assembly to mount the electronics compartment to the bottom of the frame. The cabin has a cavity, the measuring transducer, the electronic components, the sacrificial anode, and the watertight terminal are respectively disposed on the cabin cover, the measuring transducer and the watertight terminal are respectively connected to the electronic components, the measuring transducer, the sacrificial anode, and the watertight terminal are all exposed on the outer surface of the cabin cover, the cabin cover is installed on the cabin and is used to close the opening of the cabin cavity of the cabin, the sealing ring is clamped between the cabin cover and the cabin, and the electronic components are housed in the cabin cavity of the cabin; The frame includes a circular bottom support plate, a circular top support plate, and a support tube. The bottom and top of the support tube are respectively installed in the middle of the bottom support plate and the middle of the top support plate. The electronic compartment is installed on the bottom support plate. The bottom and top of each hydrophone vibrator are respectively installed on the bottom support plate and the top support plate. The distance between the central axis of the outer layer oscillator and the central axis of the support tube is twice the distance between the central axis of the inner layer oscillator and the central axis of the support tube, and the distance between the central axis of the inner layer oscillator and the central axis of the support tube is twice the distance between the central axes of two adjacent hydrophone oscillators. The hydrophone oscillator includes a carbon fiber rod, a set of hydrophone elements, two mounting bases, and an oscillator housing. The set of hydrophone elements is arranged along the extension direction of the carbon fiber rod. Each of the two ends of the carbon fiber rod is respectively mounted with a mounting base. The oscillator housing is formed on the carbon fiber rod, the hydrophone elements, and the mounting bases, so that the oscillator housing encloses a portion of the carbon fiber rod, the hydrophone elements, and the mounting bases. One of the mounting bases is mounted on the bottom support plate, and the other mounting base is mounted on the top support plate.

2. The double-layer cylindrical array measuring device according to claim 1, wherein the double-layer cylindrical array measuring device includes a set of protective strips, the opposite ends of each of the protective strips are respectively installed on the bottom support plate and the top support plate, and the protective strips are located on the outer layer of the hydrophone oscillator.

3. The double-layer cylindrical array measuring device according to claim 1, wherein the double-layer cylindrical array measuring device includes a ranging transducer, the ranging transducer is mounted on the top support plate, and the ranging transducer is connected to the electronics compartment.

4. The double-layer cylindrical array measuring device according to any one of claims 1 to 3, wherein the double-layer cylindrical array measuring device includes a rudder, the rudder being mounted on the top of the support tube and the rudder being located above the top support plate.

5. The double-layer cylindrical array measuring device according to claim 2, wherein the bottom support plate, the top support plate, the support tube and the protective strip are made of titanium alloy.

6. The double-layer cylindrical array measuring device according to any one of claims 1 to 3, wherein the shape of the electronic compartment is cylindrical, and the central axis of the electronic compartment coincides with the central axis of the support tube.

7. A ship radiated noise measurement system, characterized in that, Includes two double-layer cylindrical array measuring devices as described in any one of claims 1 to 6.

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