Zero-buoyancy photoelectric transducer for fiber-optic towed hydrophone

Abstract

The present application relates to the technical field of fiber-optic hydrophone, in particular to a zero buoyancy photoelectric conversion device for fiber-optic towed hydrophone, which comprises a cable connector, an optical cable connector and a module cabin, the first end of the photoelectric conversion module is provided with an electrical socket connected with the cable connector and conducting electrical signals, the second end is provided with an optical socket connected with the optical cable connector and conducting optical signals, a plurality of electrical sockets are arranged on the electrical socket, the number of electrical pins arranged on the cable connector is less than or equal to the number of electrical sockets, and after the cable connector is connected with the electrical socket, more than one circuit channel is formed, the photoelectric conversion device of the present application adopts a sealed shell to encapsulate the photoelectric conversion module into a sealed module, the two ends of the module are respectively provided with an optical connector socket and an electrical connector socket, and special water-tight optical connectors and electrical connectors are matched to make the whole module have a sealing function, and the number of photoelectric channels can be flexibly converted according to the number of hydrophone arrangements.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fiber-optic hydrophone technology, in particular to a zero-buoyancy photoelectric conversion device for fiber-optic towed hydrophone. BACKGROUND

[0002] A fiber-optic hydrophone is an underwater acoustic signal sensor based on fiber-optic and optoelectronic technology, mainly used for detecting sound propagation, noise, reverberation, seabed acoustic characteristics, target acoustic characteristics, etc. in the marine acoustic environment. The most mature technology is the interferometric fiber-optic hydrophone, whose basic principle is as follows: the laser emitted by a laser emitter-receiver is coupled into two paths by a fiber coupler, one of which constitutes a sensing arm of the fiber-optic interferometer and receives acoustic modulation, and the other constitutes a reference arm and does not receive acoustic modulation or receives acoustic modulation opposite to that of the sensing arm. The acoustic-modulated optical signal is reflected by a rear reflector and returns to the fiber coupler, where interference occurs. The interfered optical signal is converted into an electrical signal by a photodetector, and the acoustic information can be obtained by signal processing.

[0003] With the development of the ocean, fiber-optic hydrophones are increasingly used in coastal defense and seabed exploration. One method of using a fiber-optic hydrophone is to place the hydrophone in a rubber tube and deploy it behind a submersible, so that it floats in the water with the movement of the submersible. In this towed hydrophone, a photoelectric conversion module is needed to convert the optical signal collected by the fiber-optic hydrophone into an electrical signal, so that the detection instrument can identify and analyze the signal.

[0004] Currently, the photoelectric conversion module for the hydrophone is set inside the submersible, and the external hydrophone is directly towed by the submersible through a water-tight optical cable. In this towing method, the number of photoelectric paths between the photoelectric conversion module and the water-tight optical cable is fixed, which cannot meet the needs of port expansion. SUMMARY

[0005] The present application proposes a technical solution, a zero-buoyancy photoelectric conversion device for fiber-optic towed hydrophone, comprising:

[0006] A cable connector is arranged at the end of the cable.

[0007] An optical cable connector is arranged at the end of the hydrophone optical cable.

[0008] A module cabin includes a photoelectric conversion module, which includes a circuit board and a laser emitter-receiver. The circuit board is arranged to receive electrical signals transmitted by the cable connector and output the electrical signals as optical signals from the optical cable connector through the laser emitter-receiver. It can also receive optical signals transmitted by the optical cable connector to the laser emitter-receiver and convert the optical signals into electrical signals from the cable connector, completing the conversion of electrical / optical signals and optical / electrical signals between the cable connector and the optical cable connector.

[0009] The photoelectric conversion module is provided with an electrical socket connected with the cable connector and conducting electrical signals at the first end, and an optical socket connected with the optical cable connector and conducting optical signals at the second end. A plurality of electrical sockets are arranged on the electrical socket, and the number of electrical pins arranged on the cable connector is less than or equal to the number of electrical sockets. When the cable connector is connected with the electrical socket, more than one circuit channel is formed.

[0010] The cable connector, the module cabin and the optical cable connector have zero buoyancy in seawater.

[0011] Preferably, the module cabin further comprises a module outer shell, and the photoelectric conversion module is arranged and sealed in the module outer shell. The module outer shell and / or the photoelectric conversion module comprises a weight adjustment area which can be removed by subtractive machining to adjust the weight of the module cabin so that the module cabin has zero buoyancy in seawater.

[0012] Preferably, a support frame is arranged and screwed between the optical socket and the electrical socket. The support frame comprises the weight adjustment area.

[0013] Preferably, the module outer shell is arranged as a hollow cylinder with a through cabin inside, and more than one stepped groove is arranged on the inner wall of the module outer shell for adjusting the weight of the module outer shell.

[0014] Preferably, the inner wall of the module outer shell is provided with two stepped grooves with different inner diameters. The photoelectric conversion module is installed in the cabin from the side with a larger inner diameter, and the optical socket and the electrical socket are respectively located at two ends of the cabin and are sealed with the inner wall of the module outer shell.

[0015] Preferably, the cable connector and the optical cable connector each comprise a tail structure. The tail structure comprises a rubber layer with a density higher than seawater and hollow glass beads with a density lower than seawater. By controlling the proportion of hollow glass beads, the cable connector and the optical cable connector have zero buoyancy in seawater.

[0016] Preferably, the circuit board comprises a photoelectric conversion circuit for loading electrical signals to the laser emitter-receiver, so that the laser emitter-receiver emits corresponding optical signals to the optical socket under the control of the electrical signals. The photoelectric conversion circuit is also used for converting optical signals received by the laser emitter-receiver into electrical signals and outputting the electrical signals to the electrical socket, so that the cable connector plugged into the electrical socket and the module cabin plugged into the optical socket can realize electrical / optical signal conversion and optical / electrical signal conversion.

[0017] Preferably, the electric socket comprises an electric socket interface and the electric socket hole fixed to the inner side of the electric socket interface and electrically connected with the circuit board; and the optical socket comprises an optical socket shell, and a through hole is formed in the center of the optical socket shell and communicates with the emitting end of the laser emitting receiver.

[0018] Preferably, the electric cable joint comprises:

[0019] The electric plug pin is arranged to be electrically connected with the electric cable through the electric wire;

[0020] The electric plug front shell is arranged to be sleeved on the end of the electric cable, and an electric insulation plate for fixing the electric plug pin is arranged at the end away from the electric cable;

[0021] The electric plug rear shell is screwed to the outer side of the electric plug front shell and is used to fix the electric plug front shell to the outer side of the electric cable;

[0022] The electric fastening shell is arranged to be rotatably mounted on the outer side of the electric plug front shell and can be screwed to the outer side of the electric socket interface, so that the electric plug front shell is fixed to the end of the electric socket interface in a plug-in manner;

[0023] The electric plug vulcanization tail is arranged at the end of the electric cable close to the electric plug front shell and covers the outer sides of the electric plug rear shell and the electric plug front shell.

[0024] The electric plug vulcanization tail comprises vulcanized butyronitrile rubber doped with hollow glass microbeads, and the content of the hollow glass microbeads in the vulcanized butyronitrile rubber can be adjusted so that the electric cable joint has zero buoyancy in seawater.

[0025] Preferably, the optical cable joint comprises:

[0026] The optical contact is arranged to be optically coupled with the optical cable through the optical fiber;

[0027] The optical plug rear shell is arranged to be sleeved on the end of the optical cable and is provided with a stepped hole for accommodating the optical contact and the optical fiber in the axial direction;

[0028] The optical plug front shell is arranged to be sleeved on the outer sides of the optical plug rear shell and the optical contact, and a plug hole for axially limiting the optical contact is formed at the axial center of the optical contact; a spring is arranged between the optical plug rear shell and the optical contact, so that the optical contact can always elastically abut against the optical plug front shell;

[0029] The optical fastening shell is arranged to be rotatably mounted on the outer side of the optical plug front shell and can be screwed to the outer side of the optical socket shell, so that the optical plug front shell is fixed to the end of the optical socket shell in a plug-in manner;

[0030] The optical plug tail is arranged outside the optical cable and close to one end of the rear shell of the optical plug, and is covered outside the front shell and the rear shell of the optical plug;

[0031] The optical plug tail comprises vulcanized butyronitrile rubber doped with hollow glass microbeads, and the content of the hollow glass microbeads in the vulcanized butyronitrile rubber can be adjusted to make the optical cable joint have zero buoyancy in seawater.

[0032] Preferably, the inner side of the electrical socket interface is provided with a three-stage stepped groove which is gradually reduced in the direction away from the circuit board, and the electrical socket insulator, the electrical socket insulator pressing plate and the fixer are sequentially arranged in the three-stage stepped groove in the direction close to the circuit board, the electrical socket insulator and the electrical socket insulator pressing plate are pressed and fixed in the three-stage stepped groove by the fixer, the electrical socket insulator pressing plate is fixedly provided with the electrical socket and the guide pin on the side facing the cable joint, the electrical socket is arranged in the inner side of the electrical socket insulator, and the guide pin protrudes from the electrical socket insulator.

[0033] Preferably, a heat dissipation column is fixedly arranged between the laser emitter-receiver and the support frame, and the support frame is in contact with the inner wall of the module shell.

[0034] According to the technical scheme, the zero-buoyancy photoelectric conversion device for the fiber-optic towed hydrophone adopts a sealed shell to encapsulate a photoelectric conversion module as a sealed module, the module is respectively provided with an optical connector socket and an electrical connector socket at two ends, and the module has a sealing function by matching with a special water-tight optical connector and an electrical connector, and the number of photoelectric channels can be flexibly converted according to the number of hydrophones.

[0035] Compared with the prior art, the zero-buoyancy photoelectric conversion device for the fiber-optic towed hydrophone has the following advantages:

[0036] 1. The photoelectric conversion circuit board, the laser emitter-receiver, the heat dissipation column, the optical socket and the electrical socket are combined by the support frame and then integrally mounted on the sealed cabin shell, so that the modularity of the product is realized, the production efficiency is improved, and the module cabin is provided with a reserved subtractive region, so that the weight of the module cabin can be controlled according to requirements to meet the zero-buoyancy requirement.

[0037] 2. The plug tail is made of butyronitrile rubber mixed with glass microbeads, so that the cable joint and the optical cable joint have zero buoyancy in seawater. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures can be represented by a like numeral. For purposes of clarity, not every component can be called out in every drawing. There is now being described by way of example various embodiments of aspects of the application. These embodiments are described in relation to the drawings in which:

[0039] Figure 1 is the schematic diagram of the external structure of the zero buoyancy photoelectric conversion device for the fiber-optic towed hydrophone shown in the embodiment of the present application;

[0040] Figure 2 is the schematic diagram of the cross-sectional structure of the cable joint in the zero buoyancy photoelectric conversion device for the fiber-optic towed hydrophone shown in the embodiment of the present application;

[0041] Figure 3 is the schematic diagram of the cross-sectional structure of the module cabin in the zero buoyancy photoelectric conversion device for the fiber-optic towed hydrophone shown in the embodiment of the present application;

[0042] Figure 4 is the schematic diagram of the cross-sectional structure of the optical cable joint in the zero buoyancy photoelectric conversion device for the fiber-optic towed hydrophone shown in the embodiment of the present application;

[0043] Figure 5 is the schematic diagram of the cross-sectional structure of the module outer shell in the zero buoyancy photoelectric conversion device for the fiber-optic towed hydrophone shown in the embodiment of the present application;

[0044] Figure 6 is the schematic diagram of the cross-sectional structure of the photoelectric conversion module in the zero buoyancy photoelectric conversion device for the fiber-optic towed hydrophone shown in the embodiment of the present application;

[0045] Figure 7 is the schematic diagram of the axial side view structure of the photoelectric conversion module in the zero buoyancy photoelectric conversion device for the fiber-optic towed hydrophone shown in the embodiment of the present application, at the side of the electrical socket;

[0046] Figure 8 is the schematic diagram of the axial side view structure of the photoelectric conversion module in the zero buoyancy photoelectric conversion device for the fiber-optic towed hydrophone shown in the embodiment of the present application, at the side of the optical socket;

[0047] Figure 9 is the schematic diagram of the three-dimensional structure of the cable joint in the zero buoyancy photoelectric conversion device for the fiber-optic towed hydrophone shown in the embodiment of the present application;

[0048] Figure 10 is the schematic diagram of the three-dimensional structure of the optical cable joint in the zero buoyancy photoelectric conversion device for the fiber-optic towed hydrophone shown in the embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to better understand the technical content of the present application, specific embodiments are described below with reference to the accompanying drawings.

[0050] For example, different hydrophone arrays need to be selected according to requirements in underwater detection process, and therefore the number of hydrophones is not consistent, and the number of photoelectric paths cannot be flexibly adjusted according to specific use requirements, and therefore a zero buoyancy photoelectric conversion device for fiber-optic towed hydrophone is urgently needed.

[0051] Because the water-tight optical cable works in the seawater with certain pressure, the hydrophone also needs to be dragged transversely behind the submersible, therefore the present application aims to make the external photoelectric conversion device need to have the function of realizing photoelectric signal conversion in the seawater-resistant or light oil medium with pressure, and its density and the density of the matching cable are similar to the seawater, and the relative buoyancy in the seawater is about zero.

[0052] Zero-buoyancy photoelectric conversion device for optical fiber towed hydrophone

[0053] Therefore the present application proposes a technical scheme, a zero-buoyancy photoelectric conversion device for optical fiber towed hydrophone, which is applied to the photoelectric signal conversion in the transmission channel of the underwater towed body optical fiber hydrophone of the submersible and underwater robot, has the characteristics of being used in deep water 0-700m, small volume and zero buoyancy, and the like. Figure 1 As shown in the figure, the device mainly comprises a cable joint 1, a module cabin 2 and an optical cable joint 3.

[0054] As shown in the figures, the cable joint 1 is arranged at the end of the cable 105, the optical cable joint 3 is arranged at the end of the hydrophone optical cable 310, and the module cabin 2 is arranged to be respectively inserted and fixed with the cable joint 1 and the optical cable joint 3, and can perform electric / optical signal and optical / electric signal conversion between the cable joint 1 and the optical cable joint 3. Figure 2 Figure 4 As shown in the figures, the cable joint 1 is arranged at the end of the cable 105, the optical cable joint 3 is arranged at the end of the hydrophone optical cable 310, and the module cabin 2 is arranged to be respectively inserted and fixed with the cable joint 1 and the optical cable joint 3, and can perform electric / optical signal and optical / electric signal conversion between the cable joint 1 and the optical cable joint 3.

[0055] In this way, the photoelectric conversion module can be externally arranged, and the number of photoelectric conversion channels between the cable 105 and the hydrophone optical cable 310 can be flexibly adjusted in a pluggable manner to adapt to more use requirements.

[0056] Cable joint

[0057] As shown in the figures, the cable joint 1 comprises an electric plug vulcanization tail 101, an electric plug rear shell 102, an electric plug front shell 103, an electric fastening shell 104, an electric plug ring 107, an electric plug pin 108, an electric insulation plate 109 and an electric plug O-ring 110. Figure 2 Figure 9 The electric plug rear shell 102 is connected with the electric plug front shell 103 through threads, and when connected, the inclined surface on the electric plug rear shell 102 presses the inclined surface of the electric plug front shell 103, so that the threaded split-type clamping jaws on the electric plug front shell 103 are radially contracted, the threaded teeth are embedded in the cable 105, the fixed connection between the cable 105 and the cable joint 1 is completed, and then the sealing of the electric plug vulcanization tail 101 forms a stable plug shell structure.

[0058] Optical cable joint

[0059] The optical cable joint 3 comprises an optical plug front shell 301, an optical plug rear shell 302, an optical plug O-ring 303, an optical plug pin 304, an optical plug ring 305, an optical plug tail 306, an optical plug insulation plate 307 and an optical plug O-ring 308.

[0060] ​​Combining Figure 4 And Figure 10 As shown in the figure, the optical cable joint 3 includes an optical plug front shell 301, an optical fastening shell 302, an optical plug rear shell 303, an optical plug tail 304, an optical contact 305, a spring 306, an optical plug ring 307, and an optical plug O-ring 308.

[0061] Further, the optical cable 310 and the optical plug rear shell 303 are sealed by the optical plug tail 304, the optical plug rear shell 303 and the optical plug front shell 301 are matched by interference, and are sealed by the optical plug O-ring 308, and are fixed by the optical plug tail 304, and the optical fiber 309 in the optical cable 310 realizes positioning and transmission functions through the optical contact 305 and the spring 306.

[0062] In a specific embodiment, the optical contact 305 is an optical plug pin made of ceramic material, the optical plug front shell 301 and the optical plug rear shell 303 are made of stainless steel or aluminum alloy material, the optical plug rear shell 303 is sleeved on the end of the optical cable 310, and a stepped hole accommodating the optical contact 305 and the optical fiber 309 is formed in the axial direction, the optical plug front shell 301 is sleeved on the outside of the optical plug rear shell 303 and the optical contact 305, a plug hole for axial limiting of the optical contact 305 is formed at the center of the optical contact 305, and the spring 306 is installed between the optical plug rear shell 303 and the optical contact 305, so that the optical contact 305 can always elastically abut against the optical plug front shell 301, so that the stability of optical coupling can be ensured when the optical cable joint 3 is plugged and installed.

[0063] Further, the electrical plug vulcanized tail 101 and the optical plug tail 304 both include vulcanized nitrile rubber doped with hollow glass microbeads, and the content of hollow glass microbeads in the vulcanized nitrile rubber can be adjusted, preferably, the electrical plug vulcanized tail 101 and the optical plug tail 304 both use nitrile rubber parts resistant to light wax oil for overall injection molding, and are tightly combined with cables and metal shells to form a seal, and the density of the nitrile rubber is 1.2, which is slightly larger than seawater, and when making, pressure-resistant hollow glass microbeads with a density of 0.5 are added, so that the density can be adjusted to be less than seawater, and after being combined with the metal shell, the electrical cable joint 1 and the optical cable joint 3 have zero buoyancy in seawater.

[0064] Module cabin

[0065] Further, as shown in the figure, the module cabin 2 includes a module outer shell 213 and an optical-electric conversion module sealedly installed in the module outer shell 213. Figure 3

[0066] Among them, the optical-electric conversion module includes an electrical socket connected with the electrical cable joint 1 and conducting electrical signals, and an optical socket connected with the optical cable joint 3 and conducting optical signals.

[0067] ​Further, in order to ensure the stability of the connection between the electrical socket and the optical socket, as shown in Figure 6 The support frame 212 is screwed between the optical socket and the electrical socket by the screw 203, and the support frame 212 and the module shell 213 are made of alloy material, which has high strength and can stably and protectively support the internal photoelectric conversion module. The module shell 213 and / or the photoelectric conversion module include a weight adjustment area, which can be removed by subtractive machining to adjust the weight of the module cabin 2, so that the module cabin 2 has zero buoyancy in seawater.

[0068] In a specific embodiment, the photoelectric conversion module further includes a circuit board 204 for receiving / transmitting electrical signals and a laser emitter receiver 205 electrically connected to one end of the circuit board 204 for receiving / transmitting optical signals. The end of the laser emitter receiver 205 is fixedly connected to the optical socket, and the other end of the circuit board 204 is electrically connected to the electrical socket. The circuit board includes a photoelectric conversion circuit for loading electrical signals to the laser emitter receiver 205, so that the laser emitter receiver 205 emits corresponding optical signals to the optical socket under the control of the electrical signals, and for converting the optical signals received by the laser emitter receiver 205 into electrical signals and outputting the electrical signals to the electrical socket, so that the cable connector 1 plugged into the electrical socket and the module cabin 2 plugged into the optical socket can realize electrical / optical signal conversion and optical / electrical signal conversion.

[0069] Preferably, a heat dissipation column 214 is fixedly installed between the laser emitter receiver 205 and the support frame 212, and the support frame 212 is in contact with the inner wall of the module shell 213 to form a heat conduction heat dissipation channel for the laser emitter receiver 205.

[0070] As shown in Figure 5 The module shell 213 is provided as a hollow cylinder, and has a through cabin 2131 inside. The optical socket and the electrical socket are located at two ends of the cabin 2131 and are in sealing contact with the inner wall of the module shell 213. The inner wall of the module shell 213 is provided with one or more stepped grooves 2132 for adjusting the weight of the module shell 213.

[0071] In a preferred embodiment, the inner wall of the module shell 213 is provided with two stepped grooves 2132 with different inner diameters. The photoelectric conversion module is installed in the cabin 2131 from the side with the larger inner diameter, and the optical socket and the electrical socket are located at two ends of the cabin 2131 and are in sealing contact with the inner wall of the module shell 213.

[0072] In this way, during installation, the circuit board 204, the laser emitter receiver 205, the electrical socket, and the optical socket are assembled first, and then the module cabin O-ring 201 is installed on the outer side of the electrical socket and the optical socket. Then, the whole is pushed into the module shell 213 (as shown in Figure 3The module cabin 2 is assembled by pushing the module cabin 2 into the shell body from left to right, and then locking the module cabin 2 with the shell body by using the light socket fixing ring 216 and the light socket clasp 217.

[0073] In combination with the above, the photoelectric conversion module in the application uses the support frame 212 to combine the circuit board 204, the laser transmitter-receiver 205, the heat dissipation column 214, the light socket, and the electric socket together, and then integrally installs the combination on the module shell body 213, so that the modularity of the product is realized, and the production efficiency is improved. Since the sizes of the cable joint 1, the module cabin 2, and the optical cable joint 3 are fixed, the cable joint 1, the module cabin 2, and the optical cable joint 3 are all arranged to be able to adjust the weight according to the seawater density. The weight of each part can be accurately controlled through calculation, so that the overall density of the device is between 1 and 1.05, and the device has zero buoyancy in seawater.

[0074] Electric socket

[0075] As shown in Figure 6 , the electric socket includes an electric socket interface 206 and an electric socket hole 208 fixed to the inner side of the electric socket interface 206 and electrically connected with the circuit board 204.

[0076] Further, in combination with Figure 6 and Figure 7 , the inner side of the electric socket interface 206 is provided with a three-stage stepped groove which gradually decreases in size in the direction away from the circuit board 204. The electric socket insulator 207, the electric socket insulator pressing plate 209, and the fixer 211 are sequentially installed in the three-stage stepped groove in the direction close to the circuit board 204. The electric socket insulator 207 and the electric socket insulator pressing plate 209 are press-fitted and fixed in the three-stage stepped groove by the fixer 211. The electric socket hole 208 and the guide pin 210 are fixedly installed on the side of the electric socket insulator pressing plate 209 facing the cable joint 1. The electric socket hole 208 is located in the inner side of the electric socket insulator 207, and the other end is welded and fixed with the circuit board 204 to form a welding point 202. The guide pin 210 protrudes from the electric socket insulator 207.

[0077] Correspondingly, in combination with Figure 2 and Figure 9 , the three-stage stepped groove in the inner side of the port of the electric plug front shell 103 is fixedly installed with an electric insulating plate 109. The electric insulating plate 109 is provided with an electric plug pin 108 electrically connected with the electric cable 105 through an electric wire 106, and the electric insulating plate 109 is also provided with a guide hole.

[0078] In this way, when the cable joint 1 moves towards the electric socket for plugging, the end of the electric plug front shell 103 is first inserted into the inner side of the electric socket interface 206, and during the continuous approaching process, the guide pin 210 is inserted into the guide hole on the electric insulating plate 109, thereby improving the plugging accuracy of the cable joint 1 and the electric socket. Then, the electric plug pin 108 is continuously inserted into the metal electric socket hole 208 to complete the butt joint of the conductor and realize the electrical conduction.

[0079] In the preferred embodiment, a plurality of electrical sockets 208 are provided on the electrical socket, and the number of electrical pins 108 provided on the cable connector 1 is less than or equal to the number of electrical sockets 208, so that when the cable connector 1 is docked with the electrical socket, more than one circuit channel is formed.

[0080] In the example shown, the electrical sockets 208 are provided in six, and the electrical socket can be selected with a cable connector 1 having 1-6 electrical pins 108 according to the number of hydrophones used, for flexible selection. In specific embodiments, the number of electrical pins 108 can be increased according to actual use requirements to increase the selectivity.

[0081] Further, in order to keep the cable connector 1 and the electrical socket fixed after docking, as shown in Figure 2 and Figure 9 , the electrical fastening housing 104 is provided to be rotatably mounted on the outside of the electrical plug front housing 103 and can be screw-mounted on the outside of the electrical socket interface 206, so that when the electrical plug front housing 103 and the electrical socket interface 206 are plugged, the electrical fastening housing 104 is located on the outside of the electrical socket interface 206, and the threads on the inside thereof cooperate with the threads on the outer wall of the electrical socket interface 206 to achieve screw fixation, thereby ensuring the stability of the axial connection.

[0082] Optical socket

[0083] As shown in Figure 6 , the optical socket includes an optical socket housing 215, and a through hole is formed in the center of the optical socket housing 215 and communicates with the emission end of the laser emission receiver 205.

[0084] In specific embodiments, the optical socket housing 215 is screw-fixed with the support frame 212 by means of a screw 203, and when the optical cable connector 3 is docked with the optical socket, the optical plug front housing 301 is first inserted into the inside of the port of the optical socket housing 215, and then the optical contact 305 is inserted into the through hole at the intermediate position of the optical socket housing 215 until the optical contact 305 is optically coupled with the emission end of the laser emission receiver 205.

[0085] Further, in order to keep the optical cable connector 3 and the optical socket fixed after plugging, the optical fastening housing 302 is provided to be rotatably mounted on the outside of the optical plug front housing 301 and can be screw-mounted on the outside of the optical socket housing 215, so that when the optical plug front housing 301 and the optical socket housing 215 are plugged, the optical fastening housing 302 is located on the outside of the optical socket housing 215, and the threads on the inside thereof cooperate with the threads on the outer wall of the optical socket housing 215 to achieve screw fixation, thereby ensuring the stability of the axial connection.

[0086] In combination with the above embodiments, the photoelectric conversion device of the application adopts a sealed shell to encapsulate components such as the circuit board 204 and the laser emitter-receiver 205 into a sealed module, the module is respectively provided with a watertight optical connector socket and an electrical connector socket at two ends, and is matched with a special watertight optical connector and an electrical connector to make the whole module have a sealing function, and the number of photoelectric conversion channels can be flexibly converted according to the number of hydrophones.

[0087] Thus, the device can make the photoelectric conversion module normally used in 7MPa seawater or light kerosene, the module is sealed by a sealing ring or sealing glue, the sealing is reliable and easy to replace, the electrical interface and the optical interface of the device can be detached and locked, and the maintenance is convenient. The middle of the module is a cavity, the size of the cavity is controlled and the pressure-resistant glass beads with a density less than seawater are added in the vulcanized sealing glue to adjust the weight of the device in the design, so that the overall density of the device is between 1 and 1.05, and the suspension function in seawater is realized.

[0088] Although the application has been disclosed with the preferred embodiments as above, it is not intended to limit the application. Those skilled in the art can make various modifications and improvements without departing from the spirit and scope of the application. Therefore, the protection scope of the application shall be subject to the scope defined by the claims.

Claims

1. A zero buoyancy photoelectric transducer for fiber optic towed hydrophones, characterized by, The utility model relates to a kind of underwater acoustic sensor, including: Cable joint (1) is arranged at the end of cable (105); Optical cable joint (3) is arranged at the end of hydrophone optical cable (310); Module cabin (2) includes photoelectric conversion module, the photoelectric conversion module includes circuit board (204) and laser emission receiver (205), the circuit board (204) is arranged to receive the electrical signal transmitted by the cable joint (1), and the electrical signal is output from the optical cable joint (3) by the laser emission receiver (205) with optical signal;And receive the optical signal transmitted by the optical cable joint (3) to the laser emission receiver (205), and the optical signal is converted into electrical signal from the cable joint (1) output, complete the electrical / optical signal, optical / electrical signal conversion between the cable joint (1) and optical cable joint (3); Wherein, the first end of the photoelectric conversion module is provided with the electrical socket connected with the cable joint (1) and conducting electrical signal, the second end is provided with the optical socket connected with the optical cable joint (3) and conducting optical signal, a plurality of electrical sockets (208) are arranged on the electrical socket, the number of electrical pins (108) on the cable joint (1) is less than or equal to the number of electrical sockets (208), so that the cable joint (1) is connected with the electrical socket, and more than one circuit channel is formed; And the cable joint (1), module cabin (2) and optical cable joint (3) are zero buoyancy in seawater; The module cabin (2) further includes module outer shell (213), the photoelectric conversion module is arranged and sealedly installed in the module outer shell (213), and the module outer shell (213) and / or photoelectric conversion module include weight adjustment area, the weight adjustment area can be subtractively processed to remove, to adjust the weight of the module cabin (2), so that the module cabin (2) is zero buoyancy in seawater, the support frame (212) is screw-connected and installed between the optical socket and the electrical socket by screw (203), and the support frame (212) includes the weight adjustment area; The module outer shell (213) is arranged as a hollow cylinder, has a through cabin (2131) in the inside, and more than one ladder groove (2132) is arranged on the inner wall of the module outer shell (213), to adjust the weight of the module outer shell (213); The cable joint (1) and optical cable joint (3) all include tail attachment structure, the tail attachment structure includes rubber layer with density higher than seawater and hollow glass beads with density lower than seawater, the cable joint (1) and optical cable joint (3) are zero buoyancy in seawater by controlling the proportion of hollow glass beads; Heat dissipation column (214) is fixedly installed between the laser emission receiver (205) and support frame (212), the support frame (212) is in contact with the inner wall of module outer shell (213), to form the heat conduction heat dissipation channel of the laser emission receiver (205).

2. The zero buoyancy photoelectric conversion device for fiber-optic towed hydrophones according to claim 1, characterized in that, The inner wall of the module outer shell (213) is provided with two stepped grooves (2132) with different inner diameters, the photoelectric conversion module is installed in the cabin (2131) from the side with larger inner diameter, and the optical socket and the electrical socket are respectively located at two ends of the cabin (2131) and are in close sealing with the inner wall of the module outer shell (213).

3. The zero buoyancy optical-to-electrical transducer for fiber-optic towed hydrophones of claim 1, wherein, The circuit board comprises a photoelectric conversion circuit, which is used for loading an electrical signal to the laser emission receiver, so that the laser emission receiver emits a corresponding optical signal to the optical socket under the control of the electrical signal, and is used for converting an optical signal received by the laser emission receiver into an electrical signal and outputting the electrical signal to the electrical socket, so that the cable connector (1) plugged into the electrical socket and the module cabin (2) plugged into the optical socket realize electrical / optical signal conversion and optical / electrical signal conversion.

4. The zero buoyancy optical-to-electrical transducer for fiber-optic towed hydrophones of claim 1, wherein, The electrical socket comprises an electrical socket interface (206) and the electrical socket hole (208) fixed to the inner side of the electrical socket interface (206) and electrically connected with the circuit board (204); The optical socket comprises an optical socket shell (215), and a through hole is formed in the center of the optical socket shell (215) and communicates with the emission end of the laser emission receiver (205).

5. The zero buoyancy optical-to-electrical transducer for fiber-optic towed hydrophones of claim 4, wherein, The cable connector (1) comprises: An electrical plug pin (108) is arranged to be electrically connected with the cable (105) through an electrical lead (106); An electrical plug front shell (103) is arranged to be sleeved on the end of the cable (105), and an electrical insulation plate (109) is arranged on the end away from the cable (105) and used for fixing the electrical plug pin (108); An electrical plug rear shell (102) is screw-connected and installed on the outer side of the electrical plug front shell (103) and used for fixing the electrical plug front shell (103) on the outer side of the cable (105); An electrical fastening shell (104) is arranged to be rotationally installed on the outer side of the electrical plug front shell (103) and screw-connected and installed on the outer side of the electrical socket interface (206), so that the electrical plug front shell (103) is fixed to the end of the electrical socket interface (206) in a plug-in manner; An electrical plug vulcanization tail (101) is arranged on the outer side of the cable (105) close to the electrical plug front shell (103) and covers the outer sides of the electrical plug rear shell (102) and the electrical plug front shell (103); The electrical plug vulcanization tail (101) comprises vulcanized butyronitrile rubber doped with hollow glass microbeads, and the content of the hollow glass microbeads in the vulcanized butyronitrile rubber can be adjusted, so that the cable connector (1) has zero buoyancy in seawater.

6. The zero buoyancy optical-to-electrical transducer for fiber-optic towed hydrophones of claim 4, wherein, The optical cable connector (3) comprises: An optical contact (305) is arranged to be optically coupled with an optical cable (310) through an optical fiber (309); An optical plug rear shell (303) is arranged to be sleeved on the end of the optical cable (310) and is provided with a stepped hole for accommodating the optical contact (305) and the optical fiber (309) in the axial direction; The front shell (301) of the optical plug is arranged outside the rear shell (303) of the optical plug and the optical contact (305), and a hole is formed in the center of the optical contact (305) to axially limit the optical contact (305). The spring (306) is installed between the rear shell (303) of the optical plug and the optical contact (305), so that the optical contact (305) can always elastically abut against the front shell (301) of the optical plug. The fastening shell (302) of the optical plug is arranged to be rotatably installed outside the front shell (301) of the optical plug, and can be screwedly installed outside the shell (215) of the optical socket, so that the front shell (301) of the optical plug is fixedly inserted into the end of the shell (215) of the optical socket. The tail (304) of the optical plug is arranged outside the optical cable (310) close to the rear shell (303) of the optical plug, and covers the outside of the front shell (301) of the optical plug and the rear shell (303) of the optical plug. The tail (304) of the optical plug comprises vulcanized butyl rubber doped with hollow glass beads, and the content of hollow glass beads in the vulcanized butyl rubber can be adjusted, so that the optical cable joint (3) has zero buoyancy in seawater.

7. The zero buoyancy optical-to-electrical transducer for fiber-optic towed hydrophones of claim 4, wherein, The inner side of the electrical socket interface (206) is provided with three stepped grooves which gradually decrease in size away from the circuit board (204), and the electrical socket insulator (207), the electrical socket insulation pressing plate (209) and the fixator (211) are installed in the three stepped grooves in sequence in the direction close to the circuit board (204). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211). The electrical socket insulator (207) and the electrical socket insulation pressing plate (209) are press-fitted and fixed in the three stepped grooves by the fixator (211).

8. The zero buoyancy optical-to-electrical transducer for fiber-optic towed hydrophones of claim 1, wherein, ​

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