CN112985479B - Real-time health condition monitoring system and method for ocean buoy communication antenna - Google Patents
Real-time health condition monitoring system and method for ocean buoy communication antenna Download PDFInfo
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- CN112985479B CN112985479B CN202110175950.8A CN202110175950A CN112985479B CN 112985479 B CN112985479 B CN 112985479B CN 202110175950 A CN202110175950 A CN 202110175950A CN 112985479 B CN112985479 B CN 112985479B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35338—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using other arrangements than interferometer arrangements
- G01D5/35354—Sensor working in reflection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The invention discloses a real-time health monitoring system and a real-time health monitoring method for a communication antenna of an ocean buoy, wherein the system comprises a communication antenna and a base, the communication antenna comprises an antenna shell and a high-frequency transmission coil positioned in the antenna shell, at least 3 fiber bragg grating strain sensors are distributed on the inner wall of the bottom of the antenna shell along the radial direction, and a fiber bragg grating temperature sensor is arranged on the upper surface of the base; the buoy is internally provided with a fiber grating demodulator, an attitude sensor, a communication module, a data acquisition processing module and a power supply module, the communication antenna positioned in the antenna shell is connected with the communication module through a coaxial feeder, and the fiber grating strain sensor and the fiber grating temperature sensor are connected with the fiber grating demodulator through transmission optical fibers. The monitoring system and the monitoring method disclosed by the invention can monitor the deformation data of the ocean buoy communication antenna in real time, provide data analysis support for the fatigue degree of the communication antenna, can early warn in time, are convenient to improve the maintenance efficiency and reduce the maintenance cost.
Description
Technical Field
The invention relates to the field of communication antenna monitoring, in particular to a real-time health condition monitoring system and method for a communication antenna of an ocean buoy.
Background
The ocean buoy is one of important technical means for ocean data monitoring as an automatic unattended ocean guardian. The success rate of data communication is an important index for checking the performance of the ocean buoy, and the integrity of the buoy communication antenna directly influences the data transmission quality. However, the ocean buoy communication antenna is often damaged or even broken due to wave slapping, buoy swinging, ship collision, salt spray corrosion and the like, so that the ocean buoy data communication fails.
At present, an effective means for health real-time monitoring and early warning of an ocean buoy communication antenna structure is lacked. When the data transmission rate of the buoy is reduced and even communication is interrupted, pointed offshore maintenance and deployment cannot be performed due to the fact that the health condition of the communication antenna cannot be judged, and the offshore field inspection cost is high and the efficiency is low. Therefore, a system and a method for monitoring the health condition of the communication antenna of the ocean buoy in real time are urgently needed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a system and a method for monitoring the health condition of a communication antenna of an ocean buoy in real time, which can monitor the deformation data of the communication antenna of the ocean buoy in real time, provide data analysis support for the fatigue degree of the communication antenna, can give an early warning in time, are convenient to improve the maintenance efficiency and reduce the maintenance cost.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a real-time health monitoring system for a communication antenna of an ocean buoy comprises the communication antenna and a base used for installing the communication antenna on the buoy, wherein the communication antenna comprises an antenna shell and a high-frequency transmission coil positioned in the antenna shell, at least 3 fiber grating strain sensors are radially distributed on the inner wall of the bottom of the antenna shell, and a fiber grating temperature sensor is spot-welded on the upper surface of the base; the buoy is internally provided with a fiber grating demodulator, an attitude sensor, a communication module, a data acquisition processing module and a power supply module, the high-frequency transmission coil is connected with the communication module through a coaxial feeder line, the fiber grating strain sensor and the fiber grating temperature sensor are connected with the fiber grating demodulator through transmission optical fibers, the fiber grating demodulator is in two-way communication with the data acquisition processing module, and the data acquisition processing module is in two-way communication with the communication module;
the fiber grating demodulator comprises a light source, an optical splitter, a coupler, a wavelength detection and processing unit, a temperature control assembly, a driving unit and a power supply unit, wherein the driving unit is used for controlling the light source, light emitted by the light source reaches a fiber grating strain sensor and a fiber grating temperature sensor through the optical splitter and the coupler, wavelengths reflected by the fiber grating strain sensor and the fiber grating temperature sensor reach the wavelength detection and processing module through the coupler again, and the temperature control assembly provides temperature control for the light source.
In the above scheme, the antenna housing is made of glass fiber.
In the above scheme, the resonant wavelength range of the fiber grating strain sensor is a C + L waveband.
In the above scheme, the transmission fiber is a single-mode communication fiber, and a sleeve, a kevlar rope and a protective layer are arranged outside the transmission fiber.
In the above scheme, the wavelength range of the fiber grating demodulator is C + L waveband.
In the above scheme, the power supply module adopts a photovoltaic-lithium battery combined power supply mode.
In the above scheme, the fiber grating strain sensors include 3, are installed at the same horizontal position of the bottom of the communication antenna, and are installed at 120 degrees with each other.
A real-time health condition monitoring method for an ocean buoy communication antenna adopts the monitoring system, and comprises the following steps:
(1) the fiber grating demodulator actively acquires original reflection wavelength data of a fiber grating strain sensor and a fiber grating temperature sensor, calculates the structural parameters of the root of the communication antenna by using the original reflection wavelength data of the fiber grating strain sensor, and performs temperature compensation on the structural parameters of the communication antenna by using the original reflection wavelength data of the fiber grating temperature sensor;
(2) when the communication antenna is in a vertical static state, the data acquisition and processing module actively acquires deformation data calculated by the fiber grating demodulator and attitude data of the attitude sensor, and establishes an initial state fitting model;
(3) when the buoy enables the communication antenna to swing under the action of wind, waves and flow, the long wave peak of the reflected wave of each fiber grating strain sensor moves left and right, the fiber grating demodulator calculates the deformation data of the communication antenna by using the wave peak movement amount of the reflected wave, the data acquisition and processing module actively acquires the deformation data calculated by the fiber grating demodulator, evaluates the fatigue degree of the communication antenna, and compares the initial state fitting model with the azimuth data of the attitude sensor to calculate the swing angle and direction of the communication antenna.
Through the technical scheme, the system and the method for monitoring the health condition of the communication antenna of the ocean buoy in real time have the following beneficial effects:
1. the invention adopts the fiber grating strain sensor and the fiber grating temperature sensor to acquire deformation data and temperature data, and compared with the traditional electrical sensor, the fiber grating strain sensor has the following advantages:
the traditional electric sensor is generally a single-point resistance strain gauge which is used in combination with an elastic element, each strain sensor has at least 2 leads, and the leads cannot be connected in a narrow space of about 5 mm inside the buoy communication antenna. The optical fiber is different, the outer diameter of the packaged optical fiber is smaller than 1mm, one optical fiber can be connected with a plurality of fiber bragg gratings in series for distributed measurement, the laser spot welding is carried out on the specified position without extra wiring, and the requirement of a narrow space on miniaturization of the sensor is met.
The electrical strain sensor is easily affected by corrosion in a high-temperature and humid environment of a marine environment, and the fiber grating sensor belongs to a passive device, can resist salt spray corrosion and is free of maintenance through optical signal measurement.
2. According to the invention, the real-time monitoring and the timely early warning of the fatigue degree of the ocean buoy communication antenna are realized by collecting the deformation data and the temperature data of the communication antenna and combining the buoy attitude data to calculate the swing angle and the direction of the communication antenna, so that the working efficiency can be improved, and the maintenance cost can be reduced.
3. The invention can provide a new idea for real-time monitoring and early warning of the fatigue of the communication antenna in a plurality of fields such as buoys and the like, and has important significance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic structural diagram of an ocean buoy according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the installation position of the health condition real-time monitoring system of the marine buoy communication antenna of the invention;
FIG. 3 is a schematic diagram of a health status real-time monitoring system for a communication antenna of an ocean buoy according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a fiber grating sensing principle of a fiber grating demodulator according to an embodiment of the present invention;
FIG. 5 is a schematic view of a swing angle of a communication antenna according to the present invention;
FIG. 6 is an installation orientation diagram of the fiber grating strain sensor and attitude sensor of the present invention;
FIG. 7 is a wavelength chart of the FBG strain sensor and the FBG temperature sensor of the present invention.
In the figure, 1, an antenna housing; 2. the transmission optical fiber 3 and the fiber bragg grating strain sensor; 4. a fiber grating temperature sensor; 5. a base; 6. a fiber grating demodulator; 7. a power supply cable; 8. a power supply module; 9. a data acquisition processing module; 10. a communication module; 11. a coaxial feed line; 12. an attitude sensor; 13. a communication antenna; 14. a float; 15. a high-frequency transmission coil.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The invention provides a real-time health monitoring system for a communication antenna of a marine buoy, which is arranged on a marine buoy 14 shown in figure 1 and comprises a communication antenna 13 and a base 5 for installing the communication antenna 13 on the buoy 14, wherein the communication antenna 13 comprises an antenna shell 1 and a high-frequency transmission coil 15 positioned in the antenna shell.
As shown in fig. 2, 3 fiber grating strain sensors 3 are radially distributed on the inner wall of the bottom of the antenna housing 1, and a fiber grating temperature sensor 4 is welded on the upper surface of the base 5 in a laser spot welding manner. Deformation data and temperature data of the communication antenna 13 are monitored in real time through the fiber grating strain sensor 3 and the fiber grating temperature sensor 4.
The fiber grating demodulator 6, the attitude sensor 12, the communication module 10, the data acquisition processing module 9 and the power supply module 8 are installed inside the buoy 14, the high-frequency transmission coil 15 is connected with the communication module 10 through the coaxial feeder 11, and the fiber grating strain sensor 3 and the fiber grating temperature sensor 4 are connected with the fiber grating demodulator 6 through the transmission optical fiber 2. When the communication antenna 13 deforms due to swinging, the fiber grating demodulator 6 obtains reflection wavelength data of the fiber grating strain sensor 3 and the fiber grating temperature sensor 4, and obtains deformation data of the communication antenna 13 after temperature compensation through calculation. As shown in fig. 3, the fiber grating demodulator 6 is in bidirectional communication with the data acquisition and processing module 9, and the data acquisition and processing module 9 is in bidirectional communication with the communication module 10; the data acquisition processing module 9 acquires deformation data of the fiber grating demodulator 6 and attitude data of the attitude sensor 12, and is used for calculating the swing angle and direction of the communication antenna 13. The power supply module 8 provides power support for the fiber grating demodulator 6, the communication module 10 and the data acquisition and processing module 9 through the power supply cable 7.
The communication antenna 13 is made of glass fiber, belongs to a hard pipe, has the characteristics of long service life, light weight, high strength, good elasticity, seawater corrosion resistance and the like, is internally provided with a copper high-frequency transmission coil 15 and is used for high-frequency communication.
The resonant wavelength range of the fiber grating strain sensor 3 is the C + L waveband.
The temperature data collected by the fiber grating temperature sensor 4 is used for temperature compensation of the fiber grating strain sensor 3. The fiber grating temperature sensor 4 is packaged by adopting a high-performance stainless steel material, and is installed on the base 5 in a laser welding mode, so that the installation is firm, no damage is caused to the surface of the base 5, and the fiber grating temperature sensor is small in size and convenient to install.
The transmission optical fiber 2 is a common single-mode communication optical fiber, and a 900-micron sleeve, a Kevlar rope and a protective layer are arranged outside the transmission optical fiber.
The wavelength range of the fiber grating demodulator 6 is C + L wave band, the power consumption is less than 15W, the fiber grating demodulator can work in the environment of-25 ℃ to +85 ℃, the requirement of waterproof grade IP67 is met, and salt mist resistance and high temperature resistance are achieved.
And the data acquisition processing module 9 is used for acquiring, processing, storing and sending all data information of the buoy 14, sending the data of the swing angle and the direction of the communication antenna 13 to the shore-based receiving station on time according to user requirements, and receiving a remote control command of the shore-based receiving station.
The power supply module 8 adopts a photovoltaic-lithium battery combined power supply mode, provides stable 12-24V electric energy for the buoy 14 system, and maintains the electric quantity supply of the system.
As shown in fig. 4, the fiber grating demodulator 6 includes a light source, an optical splitter, a coupler, a wavelength detection and processing unit, a temperature control component, a driving unit and a power supply unit, the driving unit is used for controlling the light source, light emitted by the light source reaches the fiber grating strain sensor 3 and the fiber grating temperature sensor through the optical splitter and the coupler, wavelengths reflected by the fiber grating strain sensor 3 and the fiber grating temperature sensor reach the wavelength detection and processing module through the coupler again, and the temperature control component provides temperature control for the light source to cool the light source.
The optical signal generated by the light source is divided into multiple paths of optical signals by the optical splitter, and the simultaneous online monitoring of multiple channels and multiple sensors can be realized by utilizing a wavelength division multiplexing mode, so that the hardware expansibility of the invention is stronger. The variation of the reflection wavelength of the fiber grating strain sensor 3 and the fiber grating temperature sensor 4 has a linear function relationship with the variation of the external strain and the variation of the temperature. The optical signal passes through the 3dB coupler to reach the fiber grating strain sensor 3 and the fiber grating temperature sensor 4, the reflection wavelengths of the fiber grating strain sensor 3 and the fiber grating temperature sensor 4 pass through the 3dB coupler again to reach the wavelength detection and processing module, and the measurement of external strain and temperature parameters is realized. The strain sensitivity of a typical fiber grating strain sensor 3 is 1.2 pm/microstrain, the temperature sensitivity of a fiber grating temperature sensor 4 is 10 pm/DEG C, strain and temperature data of a communication antenna 13 are calculated by utilizing the peak movement amount of reflection wavelength, and the fatigue degree of the communication antenna 13 is evaluated.
In addition, the variation of the reflection wavelength of the fiber grating has a certain functional relationship with the swing angle of the communication antenna 13. When the communication antenna 13 of the buoy 14 is in a static state, as shown in fig. 5, the communication antenna 13 forms an angle theta with the base 5x＝θy＝θz(ii) a When the communication antenna 13 swings, for example, the angle θ between the communication antenna 13 and the base 5x>θy>θzBy using the vector array positioning principle and combining the orientation data of the attitude sensor 12 carried by the buoy 14, the swing direction and the swing angle delta theta of the communication antenna 13 can be calculated, so that the health condition of the communication antenna 13 is inverted and early warning is timely given out.
The invention also provides a real-time health condition monitoring method for the communication antenna 13 of the ocean buoy 14, which comprises the following steps:
firstly, configuring parameters of a fiber grating demodulator 6, including setting configuration parameters, data output frequency and the like, installing a fiber grating strain sensor 3 at the root of an antenna shell 1, and spot-welding a fiber grating temperature sensor 4 on the upper surface of a base 5. The installation positions of the fiber grating strain sensors 3 are kept in the same horizontal plane as much as possible and are uniformly distributed, and the fiber grating strain sensors form an included angle of 120 degrees; and the north direction of the attitude sensor 12 is required to be consistent with the direction of the fiber grating strain sensor 1, as shown in fig. 6. And a data acquisition processing module 9, a communication module 10, a fiber grating demodulator 6 and an attitude sensor 12 are arranged in an instrument cabin of the buoy 14.
Because of the 6 continuous operating modes of fiber grating demodulation appearance, adopt the low-power consumption design during the design, 6 internal light sources of fiber grating demodulation appearance adopt femto second laser instrument, and temperature control assembly effectively protects the light source problem of generating heat, satisfies the demand of industrial grade product.
And secondly, after the installation is finished, the system is powered on. The fiber grating demodulator actively acquires original reflection wavelength data of the fiber grating strain sensor and the fiber grating temperature sensor, the structural parameters of the root part of the communication antenna are obtained by utilizing the original reflection wavelength data of the fiber grating strain sensor, and the structural parameters of the communication antenna are subjected to temperature compensation by utilizing the original reflection wavelength data of the fiber grating temperature sensor;
thirdly, when the communication antenna 13 is in a vertical static state, the data acquisition and processing module 9 actively acquires deformation data calculated by the fiber grating demodulator 6 and attitude data of the attitude sensor 12, and establishes an initial state fitting model;
an initial state fitting model may be established by the buoy 14 when first installed, requiring the base 5 to be in a horizontal position. After the buoy 14 is powered on, initial state fitting coefficients are determined according to attitude data of the attitude sensor 12.
Fourthly, when the buoy 14 swings the communication antenna 13 under the action of wind, waves and current, the long wave peak of the reflected wave of each fiber grating strain sensor 3 moves left and right, as shown in fig. 7, wherein the directions of the movement of the wave peaks of the reflected wave of the three fiber grating strain sensors 3 are the same, but the sizes are different. The fiber grating demodulator 6 calculates the deformation size and the quantity of the communication antenna 13 by utilizing the peak shift amount of the reflection wavelength, and the data acquisition and processing module actively acquires the deformation size and the quantity calculated by the fiber grating demodulator 6 and evaluates the fatigue degree of the communication antenna 13; and then, the direction data of the attitude sensor 12 is combined, and the initial state fitting model is compared to calculate the swinging angle and the direction of the communication antenna 13. And storing the calculated swing angle and direction of the communication antenna 13 in a local standby mode, and sending alarm information to a shore-based receiving station in time. When the swing angle delta theta between the communication antenna 13 and the base 5 is less than 5 degrees, the communication antenna 13 is considered to be capable of normally working in the swing range, and strain and temperature data of the communication antenna 13 are normally reported according to the data acquisition and transmission interval of the data acquisition and processing module 9. When the swing angle between the communication antenna 13 and the base 5 is more than 5 degrees and less than delta theta and less than 15 degrees, the swing angle of the communication antenna 13 is considered to be larger, and early warning information is sent to a shore-based receiving station to report the early warning condition. When the swing angle delta theta between the communication antenna 13 and the base 5 is larger than 15 degrees, the swing angle of the communication antenna 13 is considered to be too large, and alarm information needs to be immediately sent to a shore base receiving station to remind a worker to pay attention to the working state of the buoy 14. Especially, when the swing angle Δ θ of more than 6 continuous communication frequencies is larger than 15 °, it means that the communication antenna 13 is likely to be damaged, and it is necessary to replace the communication antenna 13 when going out of the sea.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A real-time monitoring method for health conditions of communication antennas of ocean buoys adopts a real-time monitoring system for health conditions of communication antennas of ocean buoys, and comprises communication antennas and a base used for installing the communication antennas on buoys, wherein each communication antenna comprises an antenna shell and a high-frequency transmission coil positioned in the antenna shell; the buoy is internally provided with a fiber grating demodulator, an attitude sensor, a communication module, a data acquisition processing module and a power supply module, the high-frequency transmission coil is connected with the communication module through a coaxial feeder line, the fiber grating strain sensor and the fiber grating temperature sensor are connected with the fiber grating demodulator through transmission optical fibers, the fiber grating demodulator is in two-way communication with the data acquisition processing module, and the data acquisition processing module is in two-way communication with the communication module;
the fiber grating demodulator comprises a light source, an optical splitter, a coupler, a wavelength detection and processing unit, a temperature control assembly, a driving unit and a power supply unit, wherein the driving unit is used for controlling the light source, light emitted by the light source reaches a fiber grating strain sensor and a fiber grating temperature sensor through the optical splitter and the coupler, wavelengths reflected by the fiber grating strain sensor and the fiber grating temperature sensor reach the wavelength detection and processing module through the coupler again, and the temperature control assembly provides temperature control for the light source;
the monitoring method comprises the following steps:
(1) the fiber grating demodulator actively acquires original reflection wavelength data of a fiber grating strain sensor and a fiber grating temperature sensor, calculates the structural parameters of the root of the communication antenna by using the original reflection wavelength data of the fiber grating strain sensor, and performs temperature compensation on the structural parameters of the communication antenna by using the original reflection wavelength data of the fiber grating temperature sensor;
(2) when the communication antenna is in a vertical static state, the data acquisition and processing module actively acquires structural parameters calculated by the fiber grating demodulator and attitude data of the attitude sensor, and establishes an initial state fitting model;
(3) when the buoy enables the communication antenna to swing under the action of wind, waves and flow, the long wave peak of the reflected wave of each fiber grating strain sensor moves left and right, the fiber grating demodulator calculates the deformation data of the communication antenna by using the wave peak movement amount of the reflected wave, the data acquisition and processing module actively acquires the deformation data calculated by the fiber grating demodulator, evaluates the fatigue degree of the communication antenna, and compares the initial state fitting model with the azimuth data of the attitude sensor to calculate the swing angle and direction of the communication antenna.
2. The method for monitoring the health condition of the communication antenna of the ocean buoy as claimed in claim 1, wherein the antenna housing is made of glass fiber.
3. The method for monitoring the health condition of the ocean buoy communication antenna in real time according to claim 1, wherein the resonant wavelength range of the fiber grating strain sensor is a C + L waveband.
4. The method for monitoring the health condition of the communication antenna of the ocean buoy according to claim 1, wherein the transmission optical fiber is a single-mode communication optical fiber, and a sleeve, a Kevlar rope and a protective layer are arranged outside the single-mode communication optical fiber.
5. The method for monitoring the health condition of the ocean buoy communication antenna in real time as claimed in claim 1, wherein the wavelength range of the fiber grating demodulator is C + L waveband.
6. The method for monitoring the health condition of the communication antenna of the ocean buoy according to claim 1, wherein the power supply module adopts a photovoltaic-lithium battery combined power supply mode.
7. The method for monitoring the health condition of the ocean buoy communication antenna in real time according to claim 1, wherein 3 fiber bragg grating strain sensors with an included angle of 120 degrees are radially distributed on the same horizontal position of the inner wall of the bottom of the antenna shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110175950.8A CN112985479B (en) | 2021-02-09 | 2021-02-09 | Real-time health condition monitoring system and method for ocean buoy communication antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110175950.8A CN112985479B (en) | 2021-02-09 | 2021-02-09 | Real-time health condition monitoring system and method for ocean buoy communication antenna |
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| CN112985479A CN112985479A (en) | 2021-06-18 |
| CN112985479B true CN112985479B (en) | 2022-07-08 |
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