126 results about "Lightning protection system" patented technology

The invention provides a fan blade lightning protection conduction testing method and system based on machine learning, and relates to the technical field of lightning protection conduction testing, and the method comprises the steps: carrying out the current testing of a fan blade lightning protection system through a multi-channel MOS tube control circuit; performing multi-dimensional feature extraction and local feature analysis on the current response data; carrying out feature enhancement and defect identification based on the local feature sequence, and carrying out multistage clustering on an identification result; and performing global health analysis and defect traceability of lightning protection conduction performance on the fan blade lightning protection system according to a defect classification result, generating a defect attribution point location for monitoring, performing feedback optimization on a multi-channel MOS tube control circuit, and constructing a test optimization closed loop. According to the invention, the technical problem that the lightning protection conduction test efficiency is low due to the fact that the static conduction test is difficult to identify early hidden defects in the prior art is solved, the current test is carried out through the multi-channel MOS tube control circuit, and the lightning protection conduction test efficiency is improved.

The invention discloses a lightning protection monitoring alarm system, and relates to the technical field of lightning protection monitoring, and the system comprises a monitoring data analysis unit which is used for analyzing the multi-source data transmitted by a lightning protection monitoring data collection unit, judging the operation condition of a lightning protection system according to the state data of the lightning protection system, and generating a normal or abnormal signal of the lightning protection system, meanwhile, analyzing the lightning risk analysis signal, determining abnormal data, generating a grounding abnormal analysis signal or a lightning risk analysis signal, and then respectively transmitting the two signals. The lightning protection monitoring and alarming system integrates four types of multi-source data including lightning parameters, lightning protection facility states, environmental meteorology and equipment operation instead of single data monitoring, can avoid the problem of'data isolated island ', judges the state of the lightning protection system from multiple dimensions including lightning impulse, facility performance, environmental influence and equipment operation, provides more comprehensive data support for subsequent analysis, and improves the reliability of the system. The problem of judgment one-sidedness caused by the fact that traditional monitoring only depends on single data is solved.

The invention discloses an ancient building lightning protection system and method based on a lightning early warning device, and belongs to the technical field of lightning protection systems, and the system comprises a sensing layer, a decision layer, an execution layer and a digital twin platform. The sensing layer collects multi-mode environmental parameters through an annular atmospheric electric field monitoring array, a broadband electromagnetic pulse sensor and a meteorological sensor. The decision-making layer fuses data and outputs four levels of risk levels through the risk prediction model of the ancient building LSTM combined attention mechanism, and generates a protection instruction; and the execution layer adopts a bionic hidden lightning receiving device (hidden in a non-working state), a passive corona field lightning driving device and a multi-stage historic building SPD, and responds according to a grading strategy. The digital twin platform constructs a high-precision model, and realizes data visualization and protection strategy simulation optimization. Passive lightning protection is converted into active intelligent protection, the situation that a traditional device destroys the style and appearance of an ancient building is avoided, secondary damage caused by lightning stroke is reduced, self-learning optimization can be achieved, and the requirements for safety and cultural relic protection are met.

A pitch-controlled wind turbine comprising a tower, a nacelle mounted on the tower, a hub rotatably mounted on the nacelle, and at least three wind turbine blades wherein each wind turbine blade extends between a root end and a tip end, the root end being connected to the hub via a pitch mechanism; the wind turbine further comprises at least three blade connection members, each blade connection member extending from a connection point on one wind turbine blade towards a connection point on an adjacent wind turbine blade, wherein the connection points on a given wind turbine blade are arranged at a distance from the root end of the wind turbine blade and at a distance from the tip end of the wind turbine blade; each wind turbine blade comprising an outboard portion extending the distance from a tip end of the wind turbine blade to the connection point, and an inboard portion extending the distance from a root end of the wind turbine blade to the connection point; wherein the wind turbine further comprises a lightning strike protection system, and each blade connection member has an electrically conductive material configured to conduct lightning current from an outboard portion of the wind turbine blade from which the connection member extends and along a path extending with the blade connection member towards the tower.

The utility model relates to the field of blade lightning protection systems, and particularly discloses a novel blade lightning protection system grounding metal net connecting structure which comprises a main metal net laid on the surface of a blade, a grounding structure metal net attached to the main metal net, a grounding structure metal plate arranged on one side of the grounding structure metal net and a lightning arrester. The grounding structure metal plate is of a thin plate structure and comprises a first metal plate body and a second metal plate body, the first metal plate body and the second metal plate body are located on the two sides of the grounding structure metal net respectively, and the first metal plate body and the second metal plate body are oppositely arranged. The lightning arrester sequentially penetrates through the first metal plate, the grounding structure metal net and the second metal plate.

The embodiment of the invention discloses an intelligent lightning protection system for fan blade deicing control equipment, which comprises a lightning protection system body, a system state monitoring system and a comprehensive intelligent lightning protection management system, and is characterized in that the lightning protection system body consists of a grounding module, a shielding module and a surge protection module; a basic guarantee effect is achieved on a comprehensive intelligent lightning protection management system; the system state monitoring system is composed of a lightning discharge detection module and a surge protector state monitoring module and plays an auxiliary supporting role in the comprehensive intelligent lightning protection management system. The comprehensive intelligent lightning protection management system is used for realizing man-machine interaction between lightning protection equipment and operation and maintenance personnel and providing decision reference for daily operation, maintenance and management of a fan blade deicing control system. According to the method, the actual operation environment of the fan is fully considered, a lightning protection design scheme is provided in a targeted mode, and the method has the advantages of being large in lightning protection margin, high in system state sensing capacity and high in fault monitoring and early warning speed.

The present invention relates to the field of wind turbine detection technology, and discloses a wind turbine blade lightning protection system testing device and method based on an unmanned aerial vehicle (UAV). The testing device includes a self-balancing system, a telescopic rod device, a flexible connection device, and a detection device. The self-balancing system is installed between the UAV and the telescopic rod device. When the UAV is operating in the air, the telescopic rod device can rotate left and right, and the telescopic rod device always remains in a horizontal position. The detection device includes a resistance test device, a grinding probe, and a detection probe. The detection device is arranged at the front end of the telescopic rod device and is used to be adsorbed on the blade surface. The grinding probe is extended and retracted to contact the surface of the lightning receptor. After the grinding work is completed, the detection probe is extended and retracted, and the detection probe contacts the surface of the lightning receptor. The resistance test device tests the resistance between the lightning receptor and the blade root. The flexible connection device is connected to the telescopic rod device at one end and connected to the detection device at the other end. The present invention can make the test stable, reliable, and more accurate.

An insulated blade tip (11) for a lightning protection system in a wind turbine blade (5) is described. The described insulated blade tip (11) comprises: an electrically conductive receiver unit (12) having an outer portion (121) and an inner portion (122), where the outer portion (121) forms a lightning receiver; a lightning protection cable (13) electrically connected to the inner portion (122) and configured for connection to an insulated cable in order to conduct lightning from the insulated blade tip (11) to a blade root of the wind turbine blade (5); an electrically insulating block (14) having an inner cavity (16) in which the inner portion (122) and the lightning protection cable (13) are placed. The outer portion (121) is arranged at a first outer surface (1411) of the electrically insulating block (14). Furthermore, a space (19) between (i) the inner portion (122) and / or the lightning protection cable (13) and (ii) the inner surface (171, 181) of the cavity (16) is at least partially filled with a resin (20). Furthermore, a method for producing such an insulated blade tip (11) and a wind turbine blade (5) with such an insulated blade tip (11) and a wind turbine (1) are described.

The invention discloses a lightning protection intelligent online monitoring system and method based on multi-source information fusion, and relates to the technical field of lightning protection. The system adopts a three-layer architecture of an equipment layer, a communication layer and an application layer. The equipment layer comprises a lightning early warning device, a lightning current monitoring device, an SPD intelligent monitoring device and a grounding performance monitoring device, and is used for comprehensively collecting data. And the communication layer realizes data protocol conversion and security encryption transmission through an intelligent gateway. And the application layer platform adopts a multi-source data fusion analysis model and a dynamic risk assessment algorithm to realize three-level lightning early warning and predictive maintenance of the health state of the lightning protection facility. The problems that traditional lightning protection monitoring is isolated, lagged and inaccurate are solved, omnibearing and intelligent online monitoring and active safety early warning of a lightning protection system are achieved, and the system is particularly suitable for complex industrial scenes with extremely high safety requirements.

The utility model discloses a detection equipment of building lightning protection device, include: protection box, its inside is provided with lifting assembly, equipotential tester main part, it is fixedly arranged in the protection box inside, and is connected with lifting assembly, and equipotential test is carried out to building lightning protection device, the drive source of lifting assembly is arranged as drive motor, drive motor is connected with two -way screw rod through sprocket chain transmission, the end portion threaded sleeve of two -way screw rod is connected with mobile connecting seat, the top of mobile connecting seat is provided with electric telescopic handle, and the telescopic end top of electric telescopic handle is provided with fixed connecting seat. The utility model discloses through the protection of electric connection plug -in cylinder to the protection, through the protection of plug, protects the connection plug, reduces the possibility that electric connection plug -in cylinder and connection plug are influenced by outside environment, reduces the possibility that dust in air attacks electric connection plug -in cylinder.

The invention provides a wind turbine comprising a lightning protection system for providing an electrically conductive path suitable for conducting lightning from the rotor to an electrical ground. The lightning protection system comprises a shroud electrically coupled to a wind turbine bearing housing and a front end of a wind turbine hub and / or main shaft. The shroud forms part of the electrically conductive path to electrically couple the wind turbine rotor to the bearing housing via a short circuit path that bypasses the bearing arrangement.

The invention discloses a connecting method for a photovoltaic lightning protection system and a support. The connecting method comprises the connecting process that a pipe clamp is constructed to clamp a steel pipe pile to serve as stress supporting stability of an inclined rod. The elastic arch spring piece and the middle plate on the inner side of the elastic arch spring piece are filled in the interval space h between the inner sides of the pipe clamp petals A and the pipe clamp petals B, so that the opposite tensioning stress of the bolt and nut fastening assembly on the pipe clamp petals A and the pipe clamp petals B is stable, the stress supporting stability of a steel pipe pile clamped by the pipe clamps as an inclined rod is guaranteed, and the problem that the interval space h exists between the pipe clamps is solved. And the stress supporting stability of the pipe clamp for clamping the steel pipe pile as an inclined rod is influenced.

The invention discloses a waterproof lightning-protection charging device for a new energy electric vehicle, and relates to the technical field of charging devices, the waterproof lightning-protection charging device comprises a charging pile, and further comprises a lightning-protection system connected with the charging pile; a cable is electrically connected between the charging gun and the interior of the charging pile, the middle of the cable is slidably sleeved with a rotating sleeve, a ball head of the rotating sleeve is connected with a sliding frame, and the sliding frame is slidably connected to a shell of the charging pile; and the waterproof folding cover is connected to the outer side of the charging gun. The waterproof folding cover is arranged, the conical folding cover and the circular folding cover are combined, the charging gun is tightly wrapped when not used, dust is prevented from entering the charging gun, and rainwater can be effectively prevented from permeating the charging gun when it rains; the folding cover can be magnetically attracted to the periphery of the charging port of the electric vehicle after being stretched, stability is enhanced, a gap between the conical folding cover and the shell of the electric vehicle is filled with a rubber ring made of water-absorbing expansion rubber, a waterproof sealing layer is formed, and the waterproof performance is further improved.

A method for providing a conductive connection point of a lightning protection system of a wind turbine blade to an expanded foil or mesh that may be configured as a down conductor extending from a tip connection block towards a root connection block, with a plurality of conductive connection points electrically connected therewith. One method embodiment includes melting a conductive material, applying the melted conductive material in a liquid state for surrounding the expanded foil or mesh, and allowing the melted conductive material to harden for providing a mechanical and electric conductive connection between the conductive connection point and the expanded foil or mesh. Another method embodiment includes providing at least two discs made of conductive material, arranging the discs on opposite sides of the expanded foil or mesh, and fastening the discs to each other with the expanded foil or mesh therebetween for providing an electric conductive connection.

The invention discloses a debris flow monitoring and protecting device based on a high-frequency radar, and relates to the technical field of debris flow monitoring based on the high-frequency radar. The adjusting unit comprises a supporting rod, a hoop clamp, a connecting arm, a holder support and a storage module. The lightning protection unit comprises an insulation assembly, a conductive disc, an installation assembly and a lightning guiding assembly. According to the device, structural follow-up shielding is formed under the arrangement of the lightning protection unit and the adjusting unit. The cage-shaped skeleton structure of the lightning rod can move synchronously along with the movement of the radar, so that the lightning rod is ensured to be the highest point in any working posture, continuous and all-around dynamic lightning protection is provided for the high-frequency radar, and the problem of direct lightning protection of movable equipment is solved fundamentally. The lightning protection system not only provides a direct lightning discharge main channel, but also provides a preset discharge path for electric charges induced by the radar shell through the current-conducting plate, so that an internal circuit is prevented from being damaged.

The invention relates to a variable-pitch blade assembly (1) for an open-rotor turbine engine of an aircraft, the assembly comprising: a rotor (3) which is movable relative to a radial axis (X) of the turbine engine; a stator (4) which is stationary relative to the radial axis (X); and at least one lightning protection system (5). The lightning protection system (5) comprises: a pin (6), at least one face of the pin (6) being in frictional contact with the rotor (3); a screw (7) which radially extends the pin (6); and a means (8) for connecting the pin (6) and the screw (7), the connecting means (8) comprising a spring inserted between the pin (6) and the screw (7).

The invention aims to provide the rock plate curtain wall roof concealed lightning protection and lightning receiving system which is concealed between rock plates for lightning triggering and lightning receiving and prevents the rock plates from being broken due to lightning strokes and the construction method thereof. The system comprises a building main body and a plurality of rock plate pieces arranged on the building main body; the first frame is arranged on the upper surface of the building main body; the second frame is fixedly connected with the side surface of the building main body; each lightning receiving profile is connected with the first frame, and the upper part of each lightning receiving profile is provided with an extension section used for connecting and leading lightning; one end of the lightning triggering connecting piece is fixedly connected with one lightning receiving profile, and the other end of the lightning triggering connecting piece is fixedly connected with the second frame; the plurality of rock plate pieces are laid on the first frame, a spacing seam is formed between every two adjacent rock plate pieces, each lightning receiving profile is correspondingly arranged in the corresponding spacing seam, and the second frame is connected with a building main body through the lightning protection downlead in a grounding mode. The lightning protection device is applied to the technical field of building lightning protection.

The invention provides a lightning protection grounding system of a prefabricated cabin transformer substation, which is characterized in that a station area of the prefabricated cabin transformer substation is provided with a support rod and is provided with a lightning conductor, and the lightning conductor is connected with an independent concentrated grounding device through a down lead to construct a direct lightning protection system covering the whole station area, so that lightning stroke is effectively intercepted, and lightning current is led into the grounding system; and the risk that the cabin body and equipment are directly thunder is reduced. A main grounding network is arranged under the ground of a station area to form a three-dimensional grounding network with multipath current diffusion, so that the overall grounding resistance is effectively reduced, the potential difference between cabins is balanced, and dangerous step voltage and contact voltage are inhibited. A deep grounding electrode is arranged on the periphery of the main grounding grid, and an auxiliary current diffusion channel is formed by combining an external grounding body of a tunnel outside a station and a grounding electrode along the line, so that the discharge capacity of lightning current and short-circuit current is improved, and the current sharing performance and the safety redundancy of the system are enhanced. Through the synergistic effect of the lightning conductor and the main grounding grid, the lightning protection and electromagnetic safety performance of the prefabricated cabin transformer substation in a complex urban electromagnetic environment is remarkably improved.

The invention provides a mobile plasma lightning protection system. The system comprises a comprehensive control module, a plasma lightning protection module and a lightning protection lifting module which are carried on a vehicle-mounted platform. The vehicle-mounted platform can respond to a leveling instruction of the comprehensive control module to complete automatic leveling of the system. The plasma lightning protection module is composed of a plasma generator, an early warning unit and a grounding unit, and the early warning unit is connected with the comprehensive control module and can detect an electrostatic field within the radius of the system and send out a lightning early warning signal. The plasma generator is arranged in the lightning protection lifting module, and the lightning protection lifting module is arranged on the top of the vehicle-mounted platform. When a lightning protection signal is received, the lightning protection lifting module controls the plasma generator to vertically rise, and the plasma generator emits plasma outwards and is grounded through the grounding unit. According to the invention, flexible deployment, active early warning and efficient protection of lightning protection are realized, the system is especially suitable for lightning protection requirements of temporary places, and the limitation of a traditional fixed lightning protection system is broken through.

The invention relates to the technical field of lightning protection systems, in particular to a lightning protection system for house construction, which comprises at least one group of lightning receiving units, each group of lightning receiving units comprises a lightning receiving rod, a connecting seat and a mounting seat, the mounting seat is used as a fixing reference, the connecting seat is fixedly mounted at the upper end of the mounting seat, and a plurality of plugging ports are formed in the connecting seat; the adjacent lightning receiving units can be connected through the plugging ports, and the lightning receiving rods are installed on the connecting seats. The grounding unit is used for grounding thunder and lightning; one end of the downlead is connected with the lightning arresting unit, and the other end of the downlead is connected with the grounding unit; the lightning arresting rod comprises a lightning guiding end located at the upper end, a fixed end connected with the mounting base and an insulating ring connected with the lightning guiding end and the fixed end, a sliding groove is concavely formed in the lower end face of the lightning guiding end, a connecting protrusion protrudes out of the upper end face of the fixed end, the insulating ring surrounds the connecting protrusion, and a conductive block is arranged in the sliding groove in a sliding mode; the device has the effects of plug-in expansion and fault self-isolation cut-off.

The utility model relates to an outdoor passive lightning stroke counter, which adopts a double-layer shell, an outer layer adopts a non-metal waterproof box with a transparent cover, the waterproof grade reaches more than IP65 protection grade, extreme weather is adapted, an inner layer adopts a metal shielding box, a calendar unit provides dates and time, and the counter is convenient to use. The central processing unit can record the date and time of lightning stroke occurrence, and the communication unit can send the collected lightning stroke data (the number of lightning stroke times and the lightning stroke time) to a background monitoring system or a communication module and an upper computer system, thereby achieving the functions of remote monitoring and background checking. Power is supplied through the internal battery pack, an external power supply is not needed, the maintenance frequency is reduced, and the device is suitable for external lightning protection system downleads, railways, communication base stations and other multi-element scenes.

A method of manufacturing a lightning protection system for a wind turbine blade, the method comprising: providing a first metal layer; and constructing a metal reinforcing part directly onto the first metal layer using an additive manufacturing technique so as to create an electrical connection between the first metal layer and the metal reinforcing part, wherein a portion of the first metal layer extends laterally beyond the metal reinforcing part.

The lightning protection system comprises a lightning rod and a lightning protection net, the lightning rod is arranged close to equipment, the lightning protection net is erected above the equipment or a building through a support, the support comprises a bottom plate, a supporting sleeve is rotatably arranged above the bottom plate, a supporting column is slidably connected in the supporting sleeve, and the supporting column is arranged on the bottom plate. The outer side of the supporting column is connected with a clamping assembly used for clamping a lightning conductor. In the process of driving the first lead screw and the second lead screw to move by the right-hand and left-hand thread lead screw sleeves in the adjusting assembly, the supporting sleeves and the supporting columns are driven to rotate until the supporting sleeves and the supporting columns are in a vertical state, the supporting columns slide in the supporting sleeves to adjust the heights of the supporting sleeves, the tops of the supporting sleeves are flush, the smoothness of installation of the lightning protection net is ensured, and the installation efficiency is improved. And the stability of the lightning protection network is improved.

The invention discloses a curtain wall lightning protection system for a glass curtain wall in a high-rise building, the curtain wall lightning protection system comprises an embedded part, a connecting conductor, a middle conductor and a conductive connecting sheet, the embedded part is welded on a building main body structure, so that the embedded part is welded with an equipotential connecting band of the building main body structure; one end of the middle conductor is connected with the lower portion of a stand column of the glass curtain wall, the other end of the middle conductor is connected with the embedded part, one end of the connecting conductor is welded to the embedded part, and the other end of the connecting conductor is connected with the middle conductor. A lightning protection current path is formed between the stand column of the glass curtain wall and the building main body structure through the conductive connecting piece, the middle conductor and the connecting conductor. According to the curtain wall lightning protection system, the lightning protection current path is formed among the conductive connecting piece, the middle conductor, the connecting conductor and the building main body structure, the stability and reliability of the lightning protection current path are ensured through the multiple connecting structures, the lightning protection performance of the curtain wall is effectively improved, and the safety of the high-rise building structure is ensured.

The invention is applicable to the technical field of lightning protection of wind driven generators, and provides a fan blade lightning receiving system with multiple blade tip lightning receiving columns arranged in an arc shape, which comprises a metal blade tip and further comprises multiple groups of blade tip lightning receiving columns, each group of blade tip lightning receiving columns are arranged on the windward side and the leeward side of the metal blade tip in an arc shape, and each group of blade tip lightning receiving columns are arranged on the windward side and the leeward side of the metal blade tip. The metal blade tip is electrically connected with the metal blade tip; a plurality of groups of blade body lightning arresters are arranged, each group of blade body lightning arresters are arranged on the windward side and the leeward side of the fan blade at intervals, and each group of blade body lightning arresters are electrically connected with a down lead mounted in the fan blade; one end of the down lead is electrically connected with the metal blade tip, and the other end of the down lead is electrically connected with the grounding device. According to the system, the lightning stroke probability of the fan blade is reduced, the lightning stroke damage risk of the fan blade is reduced, and the lightning protection capability of the fan is effectively improved.

The invention provides a lightning protection system of a high lifting rotating structure, which comprises a lightning arrester, an upper end down lead, a lightning discharge ring, a rotating structure, a cable storage device, a lifting mechanism, a lower end down lead and a grounding device, the rotating structure is connected with the lifting mechanism, the lightning arrester is connected with the rotating structure, and the cable storage device is connected with the lightning arrester. The lightning arrester is electrically connected with the lightning discharge ring through the upper-end downlead, the lightning discharge ring is installed in the rotating structure, the two ends of the lower-end downlead are electrically connected with the lightning discharge ring and the grounding device respectively, and the middle of the lower-end downlead is arranged in the cable storage device.

The invention discloses a three-dimensional protection envelope generation method for an ancient building lightning receiving system, and belongs to the technical field of building lightning protection. According to the method, a finite element discretization thought and a constrained Delaunay triangulation technology are adopted, and a lightning receiving system is decomposed into three types of basic units including a lightning receiving needle, a linear segment lightning receiving belt and an effective lightning receiving surface; a three-dimensional protection range of each unit is accurately calculated, a continuous integral protection range without splicing gaps is synthesized through Boolean union operation, then the integral protection range is compared with a key part of a roof, and when a blind area exists, the layout of the lightning arrester is automatically adjusted, and iterative optimization is carried out. According to the method, high-precision and automatic calculation of the three-dimensional space protection range of the complex lightning receiving system of the ancient building is achieved, adaptability is high, efficiency is high, it can be ensured that no protection blind area exists in the whole roof area, and reliable technical support is provided for the lightning protection optimization design of the ancient building.