CN118464177B - A real-time monitoring system for comprehensive noise of underwater motion platform - Google Patents
A real-time monitoring system for comprehensive noise of underwater motion platform Download PDFInfo
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- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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Abstract
The invention provides an underwater motion platform comprehensive noise real-time monitoring system, wherein an optical fiber sensor array control system generates N detection optical signals with different wavelengths, each detection optical signal is respectively and correspondingly input into an optical fiber sensor array subsystem, the optical fiber sensor array subsystem comprises M optical fiber sensor array modules, the types of optical fiber sensors in the optical fiber sensor array modules comprise optical fiber vibration sensors, optical fiber underwater acoustic sensors and optical fiber air acoustic sensors, the optical fiber sensor array modules in the optical fiber sensor array subsystem adopt a space division multiplexing mode, the optical fiber sensors in the optical fiber sensor array modules adopt a time division multiplexing mode, and each optical fiber sensor array subsystem outputs optical signals to be tested, wherein the optical signals carry vibration, underwater acoustic and air acoustic parameters. The invention can realize the real-time acquisition of the simultaneous same-point comprehensive noise parameters of a certain specific area on the underwater motion platform and the arrangement requirement of different use scenes on specific types and quantity of sensors.
Description
Technical Field
The invention mainly relates to the technical field of noise monitoring, in particular to a real-time monitoring system for comprehensive noise of an underwater motion platform.
Background
Acoustic waves are the only energy radiation form in the ocean that can be spread remotely at present, and the acoustic characteristics of the underwater moving platform determine the possibility that the acoustic waves are found, tracked and identified, and noise generated by the underwater moving platform in the running process mainly comprises vibration noise (generated by a host machine, an auxiliary machine, various motors, a speed reducing device, an air compressor and the like), hydrodynamic noise (generated by interaction of rudders, a bridge, a superstructure and the like with water flow when the platform moves) and air noise (platform air noise, diesel underwater exhaust and the like). The accumulation of these noise not only increases the risk of the platform being detected and identified, but also increases the background noise of the own detection system and reduces the detection capability of the target. In order to enhance the overall performance of the underwater moving platform, high importance must be given to vibration and noise control of the platform, so that real-time monitoring of comprehensive noise of the underwater moving platform is very important.
At present, the traditional electrical sensor is widely applied, and can detect parameters such as vibration noise, hydrodynamic noise, air noise and the like, but is limited by the detection principle that large-scale array is difficult to realize, and has a plurality of limitations in use in special environments such as underwater motion platforms and the like. The optical fiber sensor has the unique advantages of large-scale array, electromagnetic interference resistance and the like, has a better application prospect, and along with the change of the development trend of the underwater moving platform to large-scale and precise measurement, the equipment with different positions and volumes is required to be provided with measuring points according to specific requirements on the large-scale underwater moving platform, and meanwhile, the problems of scattered measuring points, bad measuring environment and the like are solved, so that higher requirements are put forward on the sensor.
The existing measurement scheme of the optical fiber sensor array system cannot meet the measurement requirements of an underwater motion platform on vibration noise, hydrodynamic noise and air noise, for example, a 'fiber vibration sensing probe and fiber microseismic monitoring system' is disclosed in the patent application with publication number of CN111928937A, wherein the space division multiplexing technology has the advantages of simple optical path structure, mutual independence among channels and no crosstalk, but the system cost is higher, and the system is not suitable for large-scale multiplexing. The patent application with publication number CN114777898B discloses a symmetrical time division multiplexing structure and a high-reliability optical fiber hydrophone array system, the number of multiplexing units, the time delay among channels and the sampling rate of a demodulation system are restricted in the time division multiplexing technology, the increase of the multiplexing units can influence the dynamic range of the system, and the large-scale time division array system has certain difficulty in maintenance, once damage occurs, the maintenance time is long, and the system has a plurality of application restrictions under the specific conditions of high strength, bad environment and the like of an underwater moving platform. In addition, the detection of the comprehensive noise of the underwater motion platform can be realized by combining a plurality of existing array systems, however, the systems are usually operated independently, the synchronous and concurrent omnibearing measurement of the underwater motion platform is severely limited, and the limitation can lead to the incapability of realizing omnibearing dynamic integration and analysis of the comprehensive noise of the underwater motion platform.
In summary, no real-time monitoring system for comprehensive noise of an underwater motion platform is available at present to meet the monitoring requirement.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a real-time monitoring system for the comprehensive noise of an underwater motion platform.
The technical scheme adopted by the invention is as follows:
The real-time monitoring system for the comprehensive noise of the underwater motion platform comprises an optical fiber sensor array control system and N optical fiber sensor array subsystems, wherein N is more than or equal to 2;
The optical fiber sensor array control system is used for generating N detection optical signals with different wavelengths, and the detection optical signals with different wavelengths are respectively and correspondingly input into one optical fiber sensor array subsystem;
The optical fiber sensor array subsystem comprises M optical fiber sensor array modules, wherein each optical fiber sensor array module comprises P optical fiber sensors, the types of the optical fiber sensors in the optical fiber sensor array modules comprise optical fiber vibration sensors, optical fiber underwater acoustic sensors and optical fiber air acoustic sensors, a space division multiplexing mode is adopted among the optical fiber sensor array modules in the optical fiber sensor array subsystem, and a time division multiplexing mode is adopted among the optical fiber sensors in the optical fiber sensor array modules;
And each optical fiber sensor array subsystem forms and outputs an optical signal to be detected carrying vibration, underwater sound and air sound parameters.
Further, the optical fiber sensor array control system comprises an optical fiber sensor array signal generating system, a first wavelength division multiplexer, an optical fiber power amplifier and a first wavelength division demultiplexer, wherein the optical fiber sensor array signal generating system is sequentially connected with the first wavelength division multiplexer, the optical fiber power amplifier and the first wavelength division demultiplexer.
Further, the optical fiber sensor array signal generating system generates N optical signals with different wavelengths, the N optical signals with different wavelengths are coupled into a single optical fiber through a first wavelength division multiplexer, and are transmitted into the first wavelength division multiplexer through an optical cable after being amplified by an optical fiber power amplifier, and the optical signals with different wavelengths are separated to obtain N detection optical signals with different wavelengths.
The optical fiber sensor array control system further comprises M second wavelength division multiplexers, M optical fiber preamplifiers, M second wavelength division demultiplexers and an optical fiber sensor array signal acquisition and processing system, wherein the optical signals to be detected, output by an mth optical fiber sensor array module in the nth optical fiber sensor array subsystem, are sent to the mth second wavelength division multiplexer for wave combination, n=1, 2, N, m=1, 2, and the M, the optical signals to be detected after the wave combination are amplified by the mth optical fiber preamplifiers and then subjected to wavelength separation by the mth second wavelength division demultiplexers, then the optical signals enter the optical fiber sensor array signal acquisition and processing system through the photoelectric conversion, and then the optical signals are demodulated by using the phase generation carrier modulation and demodulation technology, so that vibration, underwater sound and air sound information in the optical signals are obtained.
Further, the optical fiber vibration sensor, the optical fiber underwater acoustic sensor and the optical fiber air acoustic sensor all adopt Michelson interferometer structures.
Further, the optical fiber sensor array subsystem comprises an optical fiber connector, a main optical cable and M optical fiber sensor array modules, detection light signals input into the optical fiber sensor array subsystem are transmitted into the main optical cable through the optical fiber connector, and the detection light signals are respectively transmitted into the M optical fiber sensor array modules connected to the main optical cable in a space division multiplexing mode;
In each optical fiber sensor array module, a detection optical signal enters the branch optical cable through the optical fiber connector, and sequentially passes through the P optical fiber sensors connected to the branch optical cable in a time division multiplexing mode to form an optical signal to be detected carrying vibration, underwater sound and air sound parameters.
Further, the main optical cable and the branch optical cable are multi-core flexible threaded armoured cables, the optical fiber sensor array modules connected to the main optical cable are distributed at equal intervals, and the optical fiber sensors connected to the branch optical cable are distributed at equal intervals.
Further, the main optical cable adopts 17-core flexible thread armor cables, and the branch optical cable adopts 2-core flexible thread armor cables.
Further, the optical fiber sensor array signal acquisition and processing system adopts a phase generation carrier modulation and demodulation technology, so that the stability of signal detection when different optical fiber sensors are used in a mixed mode is ensured. Wherein the phase-generating carrier modulation-demodulation technique employs a well-established generic technique in the art, such as the phase-generating carrier-PGC demodulation technique.
Further, the fiber optic sensor array subsystem includes 10 fiber optic sensor array modules containing 16 fiber optic sensors.
Through the technical scheme, the invention has the following technical effects:
The invention provides a real-time monitoring system for comprehensive noise of an underwater motion platform, which can simultaneously and continuously acquire comprehensive noise parameters of a certain specific area on the underwater motion platform, has strong instantaneity and accurate positioning, further estimates a noise distribution image of the underwater motion platform and propagation characteristics thereof by analyzing acquired noise data, and provides powerful data support for structural design optimization of the underwater motion platform, fine manufacturing, arrangement adjustment of mechanical equipment and other related technical researches, thereby effectively preventing potential structural faults and accidents.
The invention uses the phase generation carrier modulation and demodulation technology to ensure the stability of signal detection when different optical fiber sensors are used in a mixed mode, meets the arrangement requirements of different use scenes on an underwater motion platform on specific types and quantity of sensors, realizes more compact layout design while ensuring the performance, and improves the installation flexibility of the sensor in a limited space.
According to the invention, the M paths of space division and time division mixed multiplexing are used for constructing the P-element time division optical fiber sensor array module of the space division, so that an M multiplied by P element optical fiber sensor array subsystem is formed. N M x P primitive array subsystems are formed into a large-scale optical fiber array system through wavelength division multiplexing among the optical fiber sensor array subsystems, different subsystems can be started according to different use scenes, application requirements under various complex environments are met, and a more efficient and reliable comprehensive noise monitoring solution is provided for an underwater motion platform.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of an integrated noise real-time monitoring system for an underwater motion platform according to an embodiment;
FIG. 2 is an optical schematic diagram of an integrated noise real-time monitoring system for an underwater motion platform according to an embodiment;
FIG. 3 is an optical schematic of a fiber sensor array subsystem in one embodiment;
FIG. 4 is a schematic diagram of a fiber optic sensor array subsystem in one embodiment;
fig. 5 is a schematic diagram of the structure of a main fiber optic cable in one embodiment.
Description of the reference numerals:
1. The system comprises an optical fiber sensor array control system 2, an optical fiber sensor array subsystem 3, an optical fiber connector 4, an optical fiber sensor array module 5, a main optical cable 6, a watertight device box 7, an optical fiber vibration sensor 8, an optical fiber underwater acoustic sensor 9, an optical fiber air acoustic sensor 10 and a branch optical cable;
1-1 parts of optical fiber sensor array signal generating system, 1-2 parts of optical fiber sensor array signal generating system, 1-3 parts of optical fiber power amplifier, 1-4 parts of optical fiber power amplifier, 1-5 parts of optical fiber power amplifier, 1-6 parts of optical fiber preamplifier, 1-7 parts of optical fiber power amplifier, 1-8 parts of optical fiber sensor array signal acquisition and processing system;
2-1, a first optical fiber sensor array subsystem, 2-2, a second optical fiber sensor array subsystem, 2-3, a third optical fiber sensor array subsystem, 2-N, N optical fiber sensor array subsystem,
4-1, A first optical fiber sensor array module, 4-2, a second optical fiber sensor array module, 4-3, a third optical fiber sensor array module, 4-M, and an Mth optical fiber sensor array module;
7-1, a first optical fiber vibration sensor, 7-2, a second optical fiber vibration sensor, and 7-P and P optical fiber vibration sensors.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the spirit of the present disclosure will be clearly described in the following drawings and detailed description, and any person skilled in the art, after having appreciated the embodiments of the present disclosure, may make alterations and modifications by the techniques taught by the present disclosure without departing from the spirit and scope of the present disclosure. The exemplary embodiments of the present invention and the descriptions thereof are intended to illustrate the present invention, but not to limit the present invention.
The invention provides a real-time monitoring system for comprehensive noise of an underwater motion platform, which comprises an optical fiber sensor array control system 1, N optical fiber sensor array subsystems 2, wherein N is more than or equal to 2;N, and the optical fiber sensor array subsystems are respectively a first optical fiber sensor array subsystem 2-1, a second optical fiber sensor array subsystem 2-2 and a third optical fiber sensor array subsystem 2-3, and the third optical fiber sensor array subsystem 2-N.
The optical fiber sensor array control system 1 is used for generating N detection optical signals with different wavelengths, and the detection optical signals with different wavelengths are respectively and correspondingly input into one optical fiber sensor array subsystem 2;
The fiber sensor array subsystem 2 includes M fiber sensor array modules 4, namely a first fiber sensor array module 4-1, a second fiber sensor array module 4-2, a third fiber sensor array module 4-3, and an mth fiber sensor array module 4-M.
The first optical fiber sensor array module 4-1 includes P optical fiber vibration sensors 7, which are a first optical fiber vibration sensor 7-1, a second optical fiber vibration sensor 7-2, and a P-th optical fiber vibration sensor 7-P, respectively. The optical fiber sensor types in the optical fiber sensor array module 4 comprise an optical fiber vibration sensor 7, an optical fiber underwater acoustic sensor 8 and an optical fiber air acoustic sensor 9, the optical fiber sensor array modules 4 in the optical fiber sensor array subsystem 2 adopt a space division multiplexing mode, and the optical fiber sensors in the optical fiber sensor array modules 4 adopt a time division multiplexing mode.
Each optical fiber sensor array subsystem 2 forms and outputs an optical signal to be measured carrying vibration, underwater sound and air sound parameters.
The number of the optical fiber sensor array modules N, M is not limited, and a person skilled in the art can set the optical fiber sensor array modules according to specific application requirements, so that the array system has expandability, and a specified number of the optical fiber sensor array modules can be selected according to actual application requirements. The number of the same P is not limited, and those skilled in the art can set the number according to the specific application requirements. When a certain optical fiber sensor in one optical fiber sensor array module 4 is damaged, the whole optical fiber sensor array module 4 needs to be dismantled for P optical fiber sensors in total, and the number of P is usually not more than 16 in consideration of the easy maintenance of the whole array system. One fiber sensor array subsystem 2 contains M x P fiber sensors, which can be 128, 256, 512, designed according to the actual project requirements.
The optical fiber sensor array control system 1 comprises an optical fiber sensor array signal generating system 1-1, a first wavelength division multiplexer 1-2, an optical fiber power amplifier 1-3 and a first wavelength division demultiplexer 1-4, wherein the optical fiber sensor array signal generating system 1-1 is sequentially connected with the first wavelength division multiplexer 1-2, the optical fiber power amplifier 1-3 and the first wavelength division demultiplexer 1-4.
The optical fiber sensor array signal generating system 1-1 generates N optical signals with different wavelengths, the N optical signals with different wavelengths are coupled into a single optical fiber through the first wavelength division multiplexer 1-2, and are transmitted into the first wavelength division multiplexer 1-4 through an optical cable after being amplified by the optical fiber power amplifier 1-3, and the optical signals with different wavelengths are separated to obtain N detection optical signals with different wavelengths.
The optical fiber sensor array control system further comprises M second wavelength division multiplexers 1-5, M optical fiber preamplifiers 1-6, M second wavelength division demultiplexers 1-7 and an optical fiber sensor array signal acquisition and processing system 1-8, wherein optical signals to be detected, which are output by an mth optical fiber sensor array module in the nth optical fiber sensor array subsystem, are sent to the mth second wavelength division multiplexer 1-5 to be combined, wherein n=1, 2, & gt, N, m=1, 2, & gt, M, the combined optical signals to be detected are amplified by the mth optical fiber preamplifiers 1-6 and then subjected to wavelength separation by the mth second wavelength division multiplexer 1-7, then enter the optical fiber sensor array signal acquisition and processing system 1-8 through a split channel, are subjected to signal acquisition after photoelectric conversion, and then are demodulated by using a phase generation carrier modulation demodulation technology, so that vibration, underwater sound and air sound information in the optical signals are obtained.
In an embodiment, one optical fiber sensor array subsystem 2 includes 16×16 optical fiber sensors, and in practical applications, according to practical requirements, the optical fiber sensor array subsystem may also be 8×16, 12×16, 8×18, 12×10, etc., and the specific arrangement is combined according to practical application requirements, so that the present invention is scalable.
The invention can realize the real-time acquisition of the simultaneous same-point comprehensive noise parameters of a certain specific area on the underwater motion platform and the arrangement requirements of different use scenes on specific types and quantity of sensors, and simultaneously, the system structural design is easy to maintain and repair, thereby meeting the application requirements in various complex environments.
Referring to fig. 1 and 2, an embodiment provides a large-scale integrated array system of optical fiber vibration, underwater sound and air sound sensors, which comprises an optical fiber sensor array control system 1, N optical fiber sensor array subsystems 2, an optical fiber connector 3, M optical fiber sensor array modules 4, a main optical cable 5, a watertight device box 6, an optical fiber vibration sensor 7, an optical fiber underwater sound sensor 8, an optical fiber air sound sensor 9 and a branch optical cable 10, wherein the optical fiber sensor array control system 1 comprises an optical fiber sensor array signal generating system 1-1, a first wavelength division multiplexer 1-2, an optical fiber power amplifier 1-3, a first wavelength division multiplexer 1-4, 16 second wavelength division multiplexers 1-5, 16 optical fiber preamplifiers 1-6, 16 second wavelength division multiplexers 1-7, an optical fiber sensor array signal collecting and processing system 1-8, and the optical fiber sensor array subsystem 2 comprises 16×16 optical fiber sensors. Specifically, the fiber-optic sensor array subsystem 2 includes 16 fiber-optic sensor array modules 4, and the fiber-optic sensor array modules 4 include 16 fiber-optic sensors.
The N optical fiber sensor array subsystems 2 are a first optical fiber sensor array subsystem 2-1, a second optical fiber sensor array subsystem 2-2, an N-th optical fiber sensor array subsystem 2-N, respectively.
The M optical fiber sensor array modules 4 are respectively a first optical fiber sensor array module 4-1, a second optical fiber sensor array module 4-2, a third optical fiber sensor array module 4-3, and an M optical fiber sensor array module 4-M.
The optical fiber sensor array control system 1 comprises an optical fiber sensor array signal generating system 1-1, a first wavelength division multiplexer 1-2, an optical fiber power amplifier 1-3 and a first wavelength division demultiplexer 1-4, wherein the optical fiber sensor array signal generating system is sequentially connected with an optical fiber preamplifier 1-6, a second wavelength division demultiplexer 1-7 and an optical fiber sensor array signal collecting and processing system 1-8;
the first wavelength division multiplexer 1-4 and the second wavelength division multiplexer 1-5 in the optical fiber sensor array control system 1 are connected with N optical fiber sensor array subsystems 2;
the optical fiber connector 3 in the optical fiber sensor array subsystem 2 is connected with a main optical cable and 16 optical fiber sensor array modules 4;
The watertight device box 6 in the optical fiber sensor array module 4 is connected with the optical fiber connector 3, the branch optical cable 10 and 16 optical fiber sensors;
The optical fiber vibration sensor 7, the optical fiber underwater acoustic sensor 8 and the optical fiber air acoustic sensor 9 in the 16 optical fiber sensors are connected in any combination.
The optical fiber sensor array control system 1 forms a large-scale optical fiber vibration, underwater sound and air sound sensor integrated array system by a plurality of optical fiber sensor array subsystems 2 through wavelength division multiplexing, wherein the optical fiber sensor array signal generating system 1-1 provides N detection light signals with different wavelengths, the detection light signals are coupled into a single optical fiber through a first wavelength division multiplexer 1-2, the optical power is improved to be large enough through an optical fiber power amplifier 1-3, the detection light signals with different wavelengths are transmitted into a first wavelength division multiplexer 1-4 through an optical cable to be separated, each wavelength corresponds to one optical fiber sensor array subsystem 2, then the detection light signals are transmitted into a main optical cable through an optical fiber connector 3, and the detection light signals are respectively transmitted into 16 optical fiber sensor array modules 4 in a space division multiplexing mode; in each optical fiber sensor array module 4, detection optical signals enter a branch optical cable 10 through a watertight device box 6 and an optical fiber connector 3, pass through 16 optical fiber sensors in sequence in a time division multiplexing mode to form optical signals to be detected carrying vibration, underwater sound and air sound parameters, send the optical signals to be detected into a second wavelength division multiplexer 1-5 for wave combination, amplify the optical signals through an optical fiber preamplifier 1-6 and then carry out wavelength separation through a second wavelength division demultiplexer 1-7, and the optical signals of all channels enter an optical fiber sensor array signal acquisition and processing system 1-8 for signal acquisition after photoelectric conversion, and then demodulate the optical signals by using a phase generation carrier modulation demodulation technology so as to acquire vibration, underwater sound and air sound information of an underwater motion platform.
In the above embodiment, the optical fiber vibration sensor 7, the optical fiber underwater acoustic sensor 8 and the optical fiber air acoustic sensor 9 all adopt michelson interferometer structures, so that one detection system can acquire signals of the three sensors, meanwhile, a carrier modulation and demodulation technology is generated by adopting a phase independent of modulation parameters, stability of signal detection when different optical fiber sensors are used in a mixed mode is ensured, arrangement requirements of different use scenes on specific types and quantity sensors on an underwater motion platform are met, and occupied area of the system is compressed.
In the embodiment, the single optical fiber sensor array module 4 is formed by 16 paths of time division, and the optical fiber sensor array subsystem 2 is formed by combining 16 paths of air spaces.
The optical fiber sensor array subsystems 2 form a large-scale optical fiber array system by multiplexing the optical fiber sensor array subsystems 2 through wavelength division, and different subsystems can be started according to different use scenes, so that the application requirements under various complex environments are met.
In another embodiment, a large-scale optical fiber vibration, underwater sound and air acoustic sensor integrated array system is provided, which is different from the above embodiment in that the integrated array system comprises a first optical fiber sensor array subsystem 2-1, a second optical fiber sensor array subsystem 2-2 and an Nth optical fiber sensor array subsystem 2-N, and the optical fiber sensor array control system 1 forms a large-scale optical fiber array system by a plurality of optical fiber sensor array subsystems 2 through wavelength division multiplexing, so that different subsystems can be started according to different use situations, and the application requirements under various complex environments can be met.
As shown in fig. 3, the optical fiber sensor array subsystem 2 includes 16 optical fiber sensor array modules 4, a space division multiplexing mode is adopted among the optical fiber sensor array modules 4, the optical fiber sensor array modules 4 include 16 optical fiber sensors, and a time division multiplexing mode is adopted among the optical fiber sensors.
The optical fiber vibration sensor 7, the optical fiber underwater acoustic sensor 8 and the optical fiber air acoustic sensor 9 all adopt Michelson interferometer structures, so that a detection system can acquire signals of the three sensors, the arrangement requirements of specific types and quantity of sensors can be customized according to different use scenes on an underwater motion platform in the optical fiber sensor array module 4, the arrangement difficulty of the sensors is simplified, and the occupied area of the system is reduced.
In another embodiment, a large-scale optical fiber vibration, underwater sound and air acoustic sensor integrated array system is provided, which is different from the above embodiment in that the optical fiber sensor array signal acquisition and processing systems 1-8 adopt a phase generation carrier modulation and demodulation technology which is irrelevant to modulation parameters, so that the stability of signal detection when different optical fiber sensors are mixed for use is ensured.
As shown in fig. 4 and 5, the main optical cable 5 is a multi-core flexible threaded armoured cable, and the actual use space of the optical fiber sensor array module 4 can be adjusted according to the use requirement.
The branch optical cable 10 is a 2-core flexible threaded armored cable, and the actual use space of the optical fiber sensor can be adjusted according to the use requirement.
In another embodiment, a large-scale integrated array system of optical fiber vibration, underwater sound and air sound sensors is provided, which is different from the above embodiment in that the optical fiber sensor array subsystem 2 comprises 8 optical fiber sensor array modules, a space division multiplexing mode is adopted among the optical fiber sensor array modules 4, the optical fiber sensor array modules 4 comprise 32 optical fiber sensors, and a time division multiplexing mode is adopted among the optical fiber sensors.
In another embodiment, a large-scale integrated array system of fiber-optic vibration, underwater sound and air sound sensors is provided, which is different from the above embodiment in that the fiber-optic sensor array module 4 comprises 5 fiber-optic vibration sensors 7, 5 fiber-optic underwater sound sensors 8 and 6 fiber-optic air sound sensors 9.
Another embodiment provides a large-scale optical fiber vibration, underwater sound and air acoustic sensor integrated array system, which is different from the above embodiment in that the main optical cable 5 is a 17-core flexible threaded armor cable, the actual use space of the optical fiber sensor array module is 5 meters, the branch optical cable 10 is a 2-core flexible threaded armor cable, and the actual use space of the optical fiber sensor is 1 meter.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The real-time monitoring system for the comprehensive noise of the underwater motion platform is characterized by comprising an optical fiber sensor array control system, N optical fiber sensor array subsystems, an optical fiber connector, M optical fiber sensor array modules, a main optical cable, a watertight device box, an optical fiber vibration sensor, an optical fiber underwater acoustic sensor, an optical fiber air acoustic sensor and a branch optical cable;
The optical fiber sensor array control system comprises an optical fiber sensor array signal generating system, a first wavelength division multiplexer, an optical fiber power amplifier, a first wavelength division demultiplexer, M second wavelength division multiplexers, M optical fiber preamplifiers, M second wavelength division multiplexers and an optical fiber sensor array signal collecting and processing system, wherein N is more than or equal to 2;
The N optical fiber sensor array subsystems are a first optical fiber sensor array subsystem, a second optical fiber sensor array subsystem, and an nth optical fiber sensor array subsystem, respectively;
The M optical fiber sensor array modules are respectively a first optical fiber sensor array module, a second optical fiber sensor array module, a third optical fiber sensor array module, an ' the first optical fiber sensor array module, an ' the second optical fiber sensor array module, an ' M optical fiber sensor array module;
The optical fiber sensor array control system is used for generating N detection optical signals with different wavelengths, and the detection optical signals with different wavelengths are respectively and correspondingly input into one optical fiber sensor array subsystem; the optical fiber sensor array signal generating system is sequentially connected with the first wavelength division multiplexer, the optical fiber power amplifier and the first wavelength division demultiplexer; the second wavelength division multiplexer is sequentially connected with the optical fiber preamplifier, the second wavelength division demultiplexer and the optical fiber sensor array signal acquisition and processing system;
The optical fiber sensor array signal generation system generates N optical signals with different wavelengths, the N optical signals with different wavelengths are coupled into a single optical fiber through a first wavelength division multiplexer, and are transmitted into a first wavelength division multiplexer through an optical cable after being subjected to power amplification by an optical fiber power amplifier, and the optical signals with different wavelengths are separated to obtain N detection optical signals with different wavelengths;
The optical fiber sensor array subsystem comprises an optical fiber connector, a main optical cable and M optical fiber sensor array modules, detection light signals input into the optical fiber sensor array subsystem are transmitted into the main optical cable through the optical fiber connector, the detection light signals are respectively transmitted into the M optical fiber sensor array modules connected to the main optical cable in a space division multiplexing mode, the optical fiber sensor array modules comprise watertight device boxes, optical fiber connectors, branch optical cables and P optical fiber sensors, the types of the optical fiber sensors in the optical fiber sensor array modules comprise optical fiber vibration sensors, optical fiber water acoustic sensors and optical fiber air acoustic sensors, the optical fiber sensor array modules in the optical fiber sensor array subsystem adopt a space division multiplexing mode, and the optical fiber sensors in the optical fiber sensor array modules adopt a time division multiplexing mode; in each optical fiber sensor array module, detection light signals enter a branch optical cable through a watertight device box and an optical fiber connector, pass through P optical fiber sensors connected to the branch optical cable in sequence in a time division multiplexing mode, are distributed at equal intervals among the optical fiber sensor array modules connected to the main optical cable, and are distributed at equal intervals among the optical fiber sensors connected to the branch optical cable;
The optical signals to be detected output by the M optical fiber sensor array module in the N optical fiber sensor array subsystem are sent to the M second wavelength division multiplexer for wave combination, wherein n=1, 2, & gt, N, m=1, 2, & gt, the M optical signals to be detected after the wave combination are amplified by the M optical fiber preamplifier and then are subjected to wavelength separation by the M second wavelength division multiplexer, then the signals enter an optical fiber sensor array signal acquisition and processing system in a split way, the signals are acquired after photoelectric conversion, and then the optical signals are demodulated by using a phase generation carrier modulation demodulation technology, so that vibration, underwater sound and air sound information in the signals are acquired.
2. The real-time monitoring system for comprehensive noise of an underwater motion platform according to claim 1, wherein the main optical cable and the branch optical cable are multicore flexible threaded armoured cables.
3. The real-time monitoring system for comprehensive noise of an underwater motion platform according to claim 2, wherein the main optical cable is a 17-core flexible threaded armor cable, and the branch optical cable is a 2-core flexible threaded armor cable.
4. The system for monitoring the comprehensive noise of the underwater motion platform in real time according to any one of claims 1 to 3, wherein the optical fiber sensor array signal acquisition and processing system adopts a phase generation carrier modulation and demodulation technology, so that the stability of signal detection when different optical fiber sensors are used in a mixed mode is ensured.
5. The real-time monitoring system for the comprehensive noise of the underwater motion platform according to claim 4, wherein the optical fiber sensor array subsystem comprises 10 optical fiber sensor array modules, and the optical fiber sensor array modules comprise 16 optical fiber sensors.
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