CN113551829A - Scouring monitoring device and scouring monitoring method for offshore wind turbine foundation structure - Google Patents
Scouring monitoring device and scouring monitoring method for offshore wind turbine foundation structure Download PDFInfo
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- CN113551829A CN113551829A CN202110817934.4A CN202110817934A CN113551829A CN 113551829 A CN113551829 A CN 113551829A CN 202110817934 A CN202110817934 A CN 202110817934A CN 113551829 A CN113551829 A CN 113551829A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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Abstract
The invention relates to a scouring monitoring device and a scouring monitoring method for an offshore wind turbine foundation structure, wherein the scouring monitoring device comprises a fixed shell, a monitoring assembly, a controller and a power supply part; the fixed shell is provided with a plurality of mounting grooves from top to bottom; the monitoring components are arranged in one-to-one correspondence with the mounting grooves and comprise pressure sensors and monitoring pieces; the monitoring part comprises a floating body shell, a control module, a power supply module and a communication module are arranged in the floating body shell, the power supply module is connected with the control module, and the control module is connected with the communication module; a first relay is connected in series between the power supply module and the control module and is in a normally open state; the control module is connected with the first relay, and an OR gate is arranged between the control module and the first relay; the controller is respectively connected with the pressure sensor and the first relay, wherein the controller is connected in parallel between the first relay and the OR gate. The monitoring result of the scouring monitoring device is accurate and reliable, the scouring monitoring device can work stably for a long time, and data can be transmitted back in time.
Description
Technical Field
The invention belongs to the technical field of water body scouring monitoring, and particularly relates to a scouring monitoring device and a scouring monitoring method for an offshore wind turbine foundation structure.
Background
With the development of new energy, the offshore wind turbine has been developed greatly, and the safety of the offshore wind turbine is very important. Under the scouring action of wave, the pile foundation department of offshore wind turbine can appear scouring the hole, and scouring the hole and can exert an influence to pile foundation's stability, and simultaneously, near seabed surface is being mingled with the rivers of silt and is constantly scouring the pile foundation, can corrode and destroy pile foundation surface, can cause the collapse of offshore wind turbine when serious.
At present, a non-contact scouring monitoring device is usually adopted for monitoring scouring monitoring of an offshore wind turbine infrastructure. For example: patent CN110133666A discloses a monitoring system and method of marine wind power stake scour state, and it adopts broadband high frequency sonar device to monitor the depth of water condition that changes with time, and then confirms marine wind power stake scour corrosion condition. Patent CN108755786A discloses a scouring monitoring device for offshore wind power pile foundation, which uses a visual sensor to monitor the scouring condition of seabed to be detected. However, non-contact scour monitoring devices are typically environmentally sensitive and difficult to obtain accurate data. For example: by adopting a sonar monitoring mode, under a complex sea condition, the ultrasonic ranging has larger deviation; by adopting the monitoring mode of the visual sensor, when the visibility of the seabed is insufficient, even if the visual information is processed by the corresponding computer vision technology, accurate scouring data cannot be obtained.
Aiming at the erosion monitoring of inland river bridges, a plurality of contact type erosion monitoring devices are available at present, and most of the contact type erosion monitoring devices are directly installed on a riverbed near the bridges, so that the erosion condition is monitored in real time. However, the scouring monitoring of the foundation structure of the offshore wind turbine generator set and the scouring monitoring of the bridge or the riverbed have a large difference, the scouring of the inland river is gentle, compared with the inland river environment, the marine environment is worse, the scouring condition at sea can be serious, if the scouring monitoring device is directly installed on the offshore wind turbine and close to the riverbed, the maintenance cost of the scouring monitoring device is high, if a plurality of monitoring nodes are used for being installed separately, when serious scouring occurs, the measurement result may be inaccurate. Therefore, it is not advisable to directly use a contact-type scouring monitoring device for inland river bridges to scour and monitor the offshore wind turbine foundation structure. Moreover, since the position of the offshore wind turbine is far away, the offshore environment is difficult to predict, the change of the scouring condition may occur in a short time or may not occur for a long time after installation, which requires that the scouring monitoring device of the offshore wind turbine infrastructure has maintenance-free property, can perform long-time online monitoring and timely return data, but the existing scouring monitoring device cannot meet the requirement.
Therefore, how to provide a scouring monitoring device which has accurate and reliable monitoring results, can work stably for a long time and return data in time so as to meet the scouring monitoring requirements of the offshore wind turbine infrastructure is a technical problem which needs to be solved urgently at present.
Disclosure of Invention
In view of the above technical problems, the present invention provides a scouring monitoring device and a scouring monitoring method for an offshore wind turbine foundation structure, wherein the scouring monitoring device has accurate and reliable monitoring results, can stably measure scouring depth under long-time working conditions, can transmit data back in time, and is suitable for scouring monitoring of the offshore wind turbine foundation structure.
The invention provides a scouring monitoring device, comprising:
the fixing device comprises a fixing shell, a plurality of mounting grooves are formed in one side of the fixing shell from top to bottom;
multiunit monitoring subassembly, monitoring subassembly and mounting groove one-to-one set up, every monitoring subassembly of group all includes:
the pressure sensor is arranged at the upper edge of the notch of the mounting groove;
the monitoring piece is positioned in the mounting groove and comprises a floating body shell, a control module, a power supply module and a communication module for communicating with the shore-based base station are arranged in the floating body shell, the power supply module is connected with the control module to supply power to the control module, and the control module is connected with the communication module to control the communication module to send communication data; a first relay is connected in series on a power supply loop between the power supply module and the control module, and the first relay is in a normally open state; the control module is connected with the first relay to control the first relay, an OR gate is arranged on a control circuit between the control module and the first relay, the output end of the OR gate is connected with the first relay, and the first input end of the OR gate is connected with the control module;
the controller is respectively connected with the pressure sensor and the first relay in each group of monitoring components so as to receive the pressure value monitored by the pressure sensor and control the first relay; wherein, the connected mode of controller and first relay does: the controller is connected in parallel between the second input ends of the first relay and the OR gate;
and the power supply part is arranged in the fixed shell and supplies power to the controller.
The technical scheme has accurate and reliable monitoring results, can stably measure the scouring depth under long-time working conditions, can transmit data back in time, and is suitable for scouring monitoring of the foundation structure of the offshore wind turbine.
In some of these embodiments, the communication module is a GPS communication module including a GPS transmitter and a GPS transmitting antenna electrically connected to the GPS transmitter. According to the technical scheme, the GPS communication module is adopted, the operation of an SCADA system or a CMS system for monitoring offshore wind power can be independent, scouring data can be directly sent back to the shore-based base station through satellite communication, and the arranged GPS transmitting antenna is favorable for accelerating satellite searching speed and sending communication data.
In some embodiments, the monitoring piece further comprises a counterweight arranged in the floating body shell, the counterweight and the GPS transmitting antenna are located on two opposite sides, the GPS transmitting antenna can be always located at the top of the floating body shell when the monitoring piece floats on the sea surface, and therefore stable signal connection is guaranteed.
In some embodiments, the control module and the controller are both single-chip microcomputers, so that the power consumption is low and the performance is reliable.
In some embodiments, the scouring monitoring device further comprises electromagnets which are arranged near each mounting groove in a one-to-one correspondence manner, and the electromagnets are connected with the monitoring pieces in a magnetic adsorption manner; the power supply part supplies power to the electromagnet, and the controller controls the on-off of the power supply loop between the power supply part and the electromagnet. This technical scheme is connected the monitoring piece through the electro-magnet magnetism absorption that sets up, can be beating the in-process of locating the seabed with washing away monitoring devices, avoids the monitoring piece to deviate from the mounting groove.
In some of these embodiments, the body shell does not have magnetism, and the monitoring piece still includes connecting portion, and connecting portion one end joint is in body shell, and the other end stretches out outside body shell and inlays corrosion-resistant iron sheet.
In some embodiments, the mounting groove is arranged obliquely upwards from inside to outside, so that the monitoring piece can float out of the mounting groove.
In some embodiments, the bottom of the fixed shell is wedge-shaped, and can be arranged in the seabed along with the pile foundation of the offshore wind turbine generator set, so that the installation cost and time are saved.
Besides, the invention also provides a method for monitoring the scouring of the foundation structure of the offshore wind turbine generator, which adopts the scouring monitoring device to monitor and comprises the following steps:
fixing the scouring monitoring device on the lower side wall of the offshore wind turbine pile foundation, and driving the scouring monitoring device in the seabed along with the offshore wind turbine pile foundation;
the pressure sensor in each group of monitoring components monitors the pressure value of the seabed at the depth of the pressure sensor in real time and transmits the pressure value to the controller; when the seabed is flushed to a certain depth, the pressure value monitored by the pressure sensor in the monitoring assembly at the depth is reduced, when the pressure value received by the controller is smaller than a set pressure threshold value, the controller controls the first relay of the monitoring piece which is in the same group with the pressure sensor at the depth to be closed, so that the power module of the monitoring piece supplies power to the control module of the monitoring piece, the monitoring piece floats out of the mounting groove where the monitoring piece is located under the buoyancy effect of the floating body shell of the monitoring piece, and when the monitoring piece floats to the sea surface, the control module of the monitoring piece controls the communication module of the monitoring piece to send communication data to the shore-based base station.
In some embodiments, in the process of installing the scour monitoring device on the seabed, the controller controls the conduction of a power supply loop between the power supply part and the electromagnet so as to enable the electromagnet to be connected with the monitoring part in a magnetic adsorption manner; when the flushing monitoring device is arranged in place, the controller controls the power supply loop between the power supply part and the electromagnet to be disconnected so as to release the monitoring part.
Based on the technical scheme, the scouring monitoring device provided by the invention is not easily influenced by the environment, the monitoring data is more accurate, the monitoring stability is good, and the measurement error can not occur under the strong scouring action; the device does not need to be overhauled regularly or irregularly after being installed, is low in maintenance cost, can stably work for a long time and transmit data back in time, and can meet the requirement of scouring monitoring of the foundation structure of the offshore wind turbine.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural diagram of a flush monitoring device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a monitoring element in the erosion monitoring device according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a flush monitoring device according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for monitoring the scouring of the infrastructure of the offshore wind turbine generator system according to the embodiment of the present invention.
In the figure:
1. pile foundation of offshore wind turbine; 2. a stationary housing; 21. mounting grooves; 3. a monitoring component; 31. a pressure sensor; 32. a monitoring member; 321. a float housing; 322. a control module; 323. a power supply module; 324. a communication module; 3241. a GPS transmitter; 3242. a cable; 3243. a GPS transmitting antenna; 325. a first relay; 326. balancing weight; 327. a connecting portion; 328. corrosion resistant iron sheet; 329. an OR gate; 4. a controller; 5. a power supply element; 6. an electromagnet; 7. and a second relay.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 1 and 2, are only used for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the embodiment of the present invention provides a flush monitoring device, which comprises a fixed casing 2, a monitoring assembly 3, a controller 4 and a power supply unit 5; wherein, one side of the fixed shell 2 is provided with a plurality of mounting grooves 21 from top to bottom; the monitoring assemblies 3 are in multiple groups, the monitoring assemblies 3 are arranged in one-to-one correspondence with the mounting grooves 21, and each group of monitoring assemblies 3 comprises a pressure sensor 31 mounted at the upper edge of a notch of the mounting groove 21 and a monitoring piece 32 positioned in the mounting groove 21; the monitoring part 32 comprises a floating body shell 321, a control module 322, a power supply module 323 and a communication module 324 for communicating with a shore-based base station are arranged in the floating body shell 321, the power supply module 323 is connected with the control module 322 to supply power to the control module 322, and the control module 322 is connected with the communication module 324 to control the communication module 324 to send communication data; a first relay 325 is connected in series on a power supply loop between the power module 323 and the control module 322, and the first relay 325 is in a normally open state; the control module 322 is connected with the first relay 325 to control the first relay 325, an or gate 329 is arranged on a control circuit between the control module 322 and the first relay 325, the output end of the or gate 329 is connected with the first relay 325, and the first input end of the or gate 329 is connected with the control module 322; the controller 4 is connected with the pressure sensor 31 and the first relay 325 in each group of monitoring assemblies 3 respectively to receive the pressure value monitored by the pressure sensor 31 and control the first relay 325, wherein the connection mode of the controller 4 and the first relay 325 is as follows: the controller 4 is connected in parallel between the first relay 325 and a second input terminal of the or gate 329; the power supply member 5 is disposed in the stationary case 2, and the power supply member 5 supplies power to the controller 4.
The working principle of the scouring monitoring device is as follows: the monitoring component 3 can be connected to the lower side wall of the offshore wind turbine pile foundation 1 through the fixed shell 2 to be arranged in the seabed along with the offshore wind turbine pile foundation 1 to be in contact with the seabed, the control module 322 in the monitoring component 32 in the monitoring component 3 is not powered on initially to avoid energy consumption, after the seabed is flushed to a certain depth, the pressure sensor 31 in the monitoring component 3 at the depth can monitor that the pressure value of the seabed is reduced, and then the controller 4 controls the first relay 325 of the monitoring component 32 in the monitoring component 3 to be closed, so that a power supply loop between the power module 323 in the monitoring component 32 and the control module 322 is conducted, the control module 322 is powered on, meanwhile, the installation groove 21 at the depth is opened due to the flushing of the seabed, the monitoring component 32 can float to the sea surface under the buoyancy provided by the floating body shell 321 of the monitoring component, and the control module 322 in the monitoring component 32 can control the communication module 324 to send communication data, and the data can be transmitted back in time. It should be noted that, in the floating process of the monitoring member 32, the first relay 325 of the monitoring member 32 is disconnected from the controller 4, and as the first relay 325 of the monitoring member 32 is connected to the controller 4 and the control module 322 of the monitoring member 32 through the or gate 329, respectively, after the monitoring member 32 is disconnected from the controller 4, the control module 322 of the monitoring member 32 can continue to control the first relay 325 to maintain a closed state, thereby ensuring that the control module 322 in the monitoring member 32 is always in a power-on state.
Above-mentioned scour monitoring devices can make multiunit monitoring subassembly 3 beat with the seabed and contact in locating the seabed along with offshore wind turbine generator system pile foundation 1 through the fixed casing 2 that sets up, for contact scour monitoring devices, is difficult for receiving the environmental impact, and monitoring data is more accurate, and in addition, monitoring stability is good, can not appear measuring error under strong scouring action. Meanwhile, in the scour monitoring device, when the seabed scours to a certain depth, the monitoring element 32 corresponding to the depth can float to the sea surface, and the communication module 324 sends communication data to the shore-based base station, so that the data can be transmitted back in time. In addition, this erode monitoring devices has only adopted pressure sensor 31 a sensor, need not to set up more sensor, in complicated marine environment, the possibility of breaking down has been reduced, it need not regularly or untimely maintenance after the installation, and control module 322 in the monitoring piece 32 only can be electrified after the seabed erodees to its corresponding degree of depth, whole erode monitoring devices can keep extremely low stand-by power consumption, can work for a long time steadily, can satisfy offshore wind turbine generator system infrastructure's the monitoring requirement that erodees.
The fixed housing 2 is described in detail as follows:
as shown in fig. 1, in the embodiment, the bottom of the fixed casing 2 is wedge-shaped, so that the fixed casing can be conveniently arranged in the seabed along with the pile foundation 1 of the offshore wind turbine, and the installation cost and time are saved. The fixed casing 2 may be welded to the offshore wind turbine generator system pile foundation 1, or may be installed independently.
Further, as shown in fig. 1, in the present embodiment, the installation groove 21 is disposed obliquely upward from inside to outside, so that the monitoring member 32 is floated from the installation groove 21.
The monitoring member 32 is described in detail as follows:
as shown in fig. 2 and 3, in the monitoring unit 32, the control module 322 is preferably a single chip microcomputer, such as an MSP 430. And a single chip microcomputer is adopted as the control module 322, so that the power consumption is low and the performance is reliable.
As shown in fig. 2 and 3, in the monitoring member 32, the power module 323 is preferably a 5V lithium battery.
As shown in FIG. 2, in the monitoring member 32, the communication module 324 is preferably a GPS communication module including a GPS transmitter 3241 and a GPS transmitting antenna 3243 connected to the GPS transmitter 3241 by a cable 3242. The GPS communication module is adopted, the system can operate independently of an SCADA system or a CMS system for offshore wind power monitoring, scouring data can be directly sent back to a shore-based base station through satellite communication, and the arranged GPS transmitting antenna 3243 is favorable for accelerating satellite searching speed and sending communication data. It should be noted that the GPS communication module is powered by the single chip, and does not need to be connected to other power supply devices.
Further, as shown in fig. 2, the monitoring member 32 further includes a counterweight 326 disposed in the floating body housing 321, and the counterweight 326 and the GPS transmitting antenna 3243 are located at two opposite sides, so that the GPS transmitting antenna 3243 is always located at the top of the floating body housing 321 when the monitoring member 32 floats on the sea surface, thereby ensuring stable signal connection.
With respect to the controller 4, it should be noted that, as shown in fig. 3, the controller 4 is also preferably a single chip microcomputer, such as MSP 430. And a single chip microcomputer is adopted as the controller 4, so that the power consumption is low and the performance is reliable. It should be noted that fig. 3 only shows the control connection of the controller 4 to the pressure sensor 31 and the first relay 325 in one monitoring assembly 3, and in practice, the controller 4 may connect and control the pressure sensor 31 and the first relay 325 in multiple monitoring assemblies 3.
For the power supply element 5, it should be noted that, as shown in fig. 1 and fig. 3, the power supply element 5 is preferably a 12V battery, and because the power supply requirements of the device are different, a dc-dc conversion circuit is designed in the device, and the function of converting 12V dc to 5V dc is completed through an LM7805 chip.
In addition, in the process of installing the scour monitoring device on the seabed, in order to avoid the monitoring pieces 32 from falling out of the installation grooves 21, as shown in fig. 1 and 3, the scour monitoring device further comprises electromagnets 6 which are installed near each installation groove 21 in a one-to-one correspondence manner, and the electromagnets 6 are connected with the monitoring pieces 32 in a magnetic adsorption manner; the power supply part 5 supplies power to the electromagnet 6, and the controller 4 controls the on-off of a power supply loop between the power supply part 5 and the electromagnet 6. In the process of installing the monitoring devices for scouring on the seabed, the power supply circuit between the power supply part 5 and the electromagnet 6 is controlled by the controller 4 to be conducted, the electromagnet 6 is used for magnetic adsorption to connect the monitoring part 32, the monitoring part 32 is prevented from being separated from the installation groove 21, after the installation is in place, the power supply circuit between the power supply part 5 and the electromagnet 6 is controlled by the controller 4 to be disconnected, the monitoring part 32 is released, and the relative position of the monitoring part 32 does not have too large change due to the effect of seabed sediment after the release. It should be noted that, as shown in fig. 3, in this embodiment, a specific control manner for the controller 4 to control the on/off of the power supply loop between the power supply element 5 and the electromagnet 6 is as follows: a second relay 7 is connected in series between the power supply element 5 and the electromagnet 6, and the controller 4 (namely the MSP430 singlechip) is connected with the second relay 7 through the ULN2003 chip to control the opening and closing of the second relay 7. It should be noted that fig. 3 only shows the control connection of the controller 4 to one electromagnet 6, and in practice, the controller 4 may be connected to control a plurality of electromagnets 6.
In order to facilitate the magnetic adsorption connection between the monitoring piece 32 and the electromagnet 6, as shown in fig. 2, in this embodiment, the floating body housing 321 has no magnetism, the monitoring piece 32 further includes a connecting portion 327, one end of the connecting portion 327 is connected to the floating body housing 321 to be fixed to the floating body housing 321, and the other end of the connecting portion 327 extends out of the floating body housing 321 and is embedded with a corrosion-resistant iron sheet 328 to be connected to the electromagnet 6 by magnetic adsorption.
Based on the erosion monitoring device, as shown in fig. 4, an embodiment of the present invention further provides a method for monitoring erosion of an offshore wind turbine infrastructure, where the method for monitoring erosion by using the erosion monitoring device includes the following steps:
s1, fixing the scouring monitoring device on the lower side wall of the offshore wind turbine pile foundation 1, and driving the scouring monitoring device in the seabed along with the offshore wind turbine pile foundation 1;
s2, the pressure sensor 31 in each group of monitoring components 3 monitors the pressure value of the seabed at the depth of the pressure sensor in real time and transmits the pressure value to the controller 4; when the seabed is flushed to a certain depth, the pressure value monitored by the pressure sensor 31 in the monitoring assembly 3 at the certain depth is reduced, when the pressure value received by the controller 4 is smaller than a set pressure threshold value, the controller 4 controls the first relay 325 of the monitoring piece 32 in the same group with the pressure sensor 31 at the certain depth to be closed, so that the power module 323 of the monitoring piece 32 supplies power to the control module 322 of the monitoring piece 32, the monitoring piece 32 floats out of the mounting groove 21 where the monitoring piece 32 is positioned under the buoyancy of the floating body shell 321 of the monitoring piece, and when the monitoring piece 32 floats to the sea surface, the control module 322 of the monitoring piece 32 controls the communication module 324 of the monitoring piece 32 to send communication data to the shore-based station.
In some embodiments, during the process of installing the scour monitoring apparatus on the seabed, the controller 4 controls the conduction of the power supply circuit between the power supply element 5 and the electromagnet 6, so that the electromagnet 6 is magnetically attached to the monitoring element 32; when the flushing monitoring device is in place, the controller 4 controls the power supply circuit between the power supply part 5 and the electromagnet 6 to be disconnected so as to release the monitoring part 32.
Through the description of the embodiments of the erosion monitoring device and the erosion monitoring method for the offshore wind turbine infrastructure, it can be seen that the erosion monitoring device and the erosion monitoring method for the offshore wind turbine infrastructure provided by the invention have at least one or more of the following advantages:
1. the scouring monitoring device is not easily influenced by the environment, the monitoring data are more accurate, the monitoring stability is good, and the measuring error can not occur under the strong scouring action;
2. the scouring monitoring device does not need to be overhauled regularly or irregularly after being installed, is low in maintenance cost, can stably work for a long time and transmit data back in time, and can meet the scouring monitoring requirement of the foundation structure of the offshore wind turbine;
3. the scouring monitoring device adopts a GPS communication module, can be independent of the operation of an SCADA system or a CMS system for monitoring offshore wind power, directly sends scouring data back to a shore-based base station through satellite communication, and is suitable for scouring monitoring of an offshore wind power generation set foundation structure.
Finally, it should be noted that: the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. Scour monitoring means, characterized by, includes:
the fixing device comprises a fixing shell, a fixing frame and a fixing frame, wherein one side of the fixing shell is provided with a plurality of mounting grooves from top to bottom;
the multiunit monitoring subassembly, the monitoring subassembly with the mounting groove one-to-one sets up, every group the monitoring subassembly all includes:
the pressure sensor is arranged at the upper edge of the notch of the mounting groove;
the monitoring piece is positioned in the mounting groove and comprises a floating body shell, a control module, a power supply module and a communication module for communicating with a shore-based base station are arranged in the floating body shell, the power supply module is connected with the control module to supply power to the control module, and the control module is connected with the communication module to control the communication module to send communication data; a first relay is connected in series on a power supply loop between the power supply module and the control module, and the first relay is in a normally open state; the control module is connected with the first relay to control the first relay, an OR gate is arranged on a control circuit between the control module and the first relay, the output end of the OR gate is connected with the first relay, and the first input end of the OR gate is connected with the control module;
the controller is respectively connected with the pressure sensor and the first relay in each group of monitoring components so as to receive the pressure value monitored by the pressure sensor and control the first relay; wherein, the connection mode of controller and first relay does: the controller is connected between the first relay and the second input end of the OR gate in parallel;
the power supply part is arranged in the fixed shell and supplies power to the controller.
2. The scour monitoring device of claim 1, wherein the communication module is a GPS communication module comprising a GPS transmitter and a GPS transmitting antenna electrically connected to the GPS transmitter.
3. The scour monitoring device of claim 2, the monitoring member further comprising a weight disposed within the float housing, the weight being on opposite sides of the GPS transmitting antenna.
4. The flush monitoring device of claim 1, wherein the control module and the controller are each a single-chip microcomputer.
5. The washout monitoring device of claim 1, further comprising electromagnets mounted in one-to-one correspondence adjacent each of the mounting slots, the electromagnets being magnetically attached to the monitoring members; the power supply part supplies power to the electromagnet, and the controller controls the on-off of a power supply loop between the power supply part and the electromagnet.
6. The scour monitoring device of claim 5, wherein the float housing is non-magnetic, the monitoring member further comprises a connecting portion, one end of the connecting portion is clamped to the float housing, and the other end of the connecting portion extends out of the float housing and is embedded with a corrosion-resistant iron sheet.
7. The washout monitoring device of claim 1, wherein the mounting slot is angled upwardly from the inside to the outside.
8. The flush monitoring device according to claim 1, wherein the bottom of the stationary housing is wedge-shaped.
9. Method for monitoring the scouring of an offshore wind turbine infrastructure, characterized in that the scouring monitoring device according to any one of claims 1-8 is used for monitoring, comprising the steps of:
fixing the scouring monitoring device on the lower side wall of the offshore wind turbine pile foundation, and driving the scouring monitoring device in the seabed along with the offshore wind turbine pile foundation;
the pressure sensor in each group of monitoring assemblies monitors the pressure value of the seabed at the depth of the pressure sensor in real time and transmits the pressure value to the controller; when the seabed is flushed to a certain depth, the pressure value monitored by the pressure sensor in the monitoring assembly at the depth is reduced, when the pressure value received by the controller is smaller than a set pressure threshold value, the controller controls the first relay of the monitoring piece which is in the same group with the pressure sensor at the depth to be closed, so that the power module of the monitoring piece supplies power to the control module of the monitoring piece, the monitoring piece floats out of the mounting groove where the monitoring piece is located under the buoyancy effect of the floating body shell of the monitoring piece, and when the monitoring piece floats to the seabed, the control module of the monitoring piece controls the communication module of the monitoring piece to send communication data to the shore-based base station.
10. The method for monitoring scouring of an offshore wind turbine foundation structure according to claim 9, further comprising controlling conduction of a power supply loop between the power supply element and an electromagnet by the controller during deployment of the scouring monitoring device on a seabed, so that the electromagnet is magnetically attached to the monitoring element; when the flushing monitoring device is arranged in place, the controller controls the power supply circuit between the power supply part and the electromagnet to be disconnected so as to release the monitoring part.
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