Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
41results about How to "Maintain safe operation" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
MRI Compatible Leadless Cardiac Pacemaker
InactiveUS20130274847A1Maintain safe operationEpicardial electrodesExternal electrodesTissue heatingPath length
An implantable battery powered leadless pacemaker or biostimulator is provided that may include any of a number of features. One feature of the biostimulator is that it safely operates under a wide range of MRI conditions. One feature of the biostimulator is that it has a total volume small enough to avoid excessive image artifacts during a MRI procedure. Another feature of the biostimulator is that it has reduced path lengths between electrodes to minimize tissue heating at the site of the biostimulator. Yet another feature of the biostimulator is that a current loop area within the biostimulator is small enough to reduce an induced current and voltage in the biostimulator during MRI procedures. Methods associated with use of the biostimulator are also covered.
Owner:PACESETTER INC
Safety device for an aerial lift, a method of operation thereof, an aerial lift having the safety device, a kit of parts and a method of installation thereof for providing the safety device in an aerial lift
InactiveUS20130153333A1Easy to installInhibit the ability of operators on the platformSafety devices for lifting equipmentsWindow cleanersAerial liftEngineering
An aerial lift, a kit of parts for installing a safety device in the aerial lift and a method includes a moveable platform having a control panel operable to manoeuvre the platform provided near a first side of the platform and a proximity sensing means that remotely senses the presence of off-platform objects within a sensing zone opposite the control panel. A further method averts an accident when operating an aerial lift by remotely sensing whether or not an off-platform object is present in a sensing zone of proximity, and if an object is sensed in the sensing zone, signalling an alarm and / or shutting down the aerial lift to stop further movement of the platform.
Owner:SAFETY ZONE
Transformer fault diagnosis method and apparatus
InactiveCN107063349AFast learningImprove global convergenceElectrical testingNeural architecturesNerve networkTransformer
The invention discloses a transformer fault diagnosis method and apparatus, relating to the technical field of a power system and particularly solving the problem of low fault diagnosis accuracy of a transformer. The method includes obtaining the dissolved gas concentration in the insulating oil of the transformer, wherein the transformer is a transformer having a determined fault type; establishing a fault parallel table of the fault types of the transformer and the gas concentration; taking the data in the fault parallel table as the training sample and the test sample, and constructing and training a nerve network; and inputting the concentration of the detected gas dissolved in the insulating oil of the transformer, and diagnosing the fault type of the transformer to be diagnosed. The transformer fault diagnosis method and apparatus are applicable to the transformer fault diagnosis.
Owner:YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST +1
DoS (Denial of Service) and DDoS (Distributed Denial of service) attack resisting method of DNS recursive server
The invention relates to a DoS and DDoS attack resisting method and device of a DNS recursive server. The method comprises monitoring the current concurrent recursive request quantity of the recursive server in real time, and when the recursive request quantity is continuously larger than the designated multiples of the maximum concurrent recursive query total volume that the recursive service can process within a specific time period, starting the response mechanism of a common DNS cache for prefetching and limiting the concurrent recursive query quantity when the specific time period times out. According to the DoS and DDoS attack resisting method of the DNS recursive server, by monitoring the current concurrent recursive request quantity of the recursive server in real time and starting the response mechanism at the appropriate time, the cache hit rate of DNS query can be improved, queries issued by the recursive server to other DNSs can be inhibited, so that server resources and network bandwidth which are occupied during DoS and DDoS attacks can be reduced, so that normal response to analysis requests of legitimate users can be guaranteed to the maximum extent, and safe operation of a DNS system can be maintained.
Owner:INTERNET DOMAIN NAME SYST BEIJING ENG RES CENT +1
MMC converter valve submodule online monitoring method and system
ActiveCN111596160AImprove reliabilityMaintain safe operationElectrical testingElectrical and Electronics engineeringMonitoring methods
The invention discloses an MMC converter valve submodule on-line monitoring method and system. The method comprises the steps of: obtaining a switch module trigger signal and operation state electrical quantity parameters of all submodules; calculating operation monitoring parameters of each sub-module according to the switch module trigger signal and the operation state electrical quantity parameters of each sub-module; and according to a preset sub-module operation monitoring parameter threshold, the operation state electrical quantity parameters of each sub-module and the operation monitoring parameters of each sub-module, judging whether the operation of each sub-module is abnormal or not, and obtaining a monitoring result. According to the invention, the measured electrical quantity parameters of the operation states of the sub-modules are analyzed and calculated; and the multi-submodule operation monitoring parameters capable of visually reflecting the operation state of the converter valve submodule are obtained, so that maintenance personnel can conveniently monitor the MMC converter valve submodule at multiple angles, and the safe operation of the converter valve can be more accurately, more conveniently and more effectively maintained.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
Negative sequence inhibiting device and method for asynchronous motor under unbalanced voltage condition
The invention relates to negative sequence inhibiting device and method for an asynchronous motor under an unbalanced voltage condition. The device is characterized in three phases of a positive / negative sequence voltage current detecting module are respectively correspondingly connected with three phases at the asynchronous motor; the input side of a negative sequence inhibiting wave generation module is connected to a power grid through a voltage regulator; a power supply module is connected with the power grid. According to the technical scheme, the device has the advantages that the positive and negative sequence components and unbalance factor of the asynchronous motor end of the motor in running are acquired on real time; the microcomputer is used for calculating and processing, a corresponding control instruction is sent to the negative sequence inhibitor to generate voltage waveform for inhibiting the negative sequence component of the asynchronous motor, so as to reduce the adverse influence of the negative sequence component on the asynchronous motor; in addition, when detecting that the voltage unbalance factor of the asynchronous motor end and the stator single-phase maximum current exceed the extreme safety operation range, an alarming signal is sent, a power supply of the asynchronous motor is cut off, and therefore, the safety operation of the asynchronous motor is ensured.
Owner:STATE GRID CORP OF CHINA +1
Early warning method and equipment for secondary circuit fault of relay protection device
ActiveCN106950450AEliminate hidden dangersMaintain safe operationElectrical testingSecondary circuitElectric power system
The invention provides an early warning method and equipment for a secondary circuit fault of a relay protection device. The method comprises steps of S1, acquiring recording files of the plurality of interrelated relay protection devices; S2, according to the recording files, if a first relay protection device that is uniquely triggered or only not triggered to start exists in the relay protection devices, determining that the secondary circuit of the first relay protection device is faulty, otherwise, determining that there is no fault. By determining whether there is a relay protection device that is uniquely triggered or only not triggered to start in the plurality of interrelated relay protection devices, it is possible to detect not only the steady-state fault inside the relay protection devices but also to effectively detect the intermittent hidden failure of the secondary circuit and send an early warning signal, so as to facilitate the timely elimination of hidden dangers and to maintain the safe operation of the power system.
Owner:STATE GRID CORP OF CHINA +2
"hose nozzle apparatus and method"
Owner:WATERSHIELD
Swing seat
ActiveUS8083600B2Avoid breakingMaintain safe operationSwingsChildren furnitureEngineeringUltimate tensile strength
A swing seat assembly is provided for enhancing durability of the swing and increasing the safety of a person using the swing. The swing seat assembly includes an elongated seat element and a reinforcing member extending along the seat element. The reinforcing member is formed of a different material than the seat element and has a tensile strength that is greater than the tensile strength of the seat element. The assembly also includes a pair of rigid connecting elements configured to operably couple the seat element with suspending elements, where the connecting elements at least partially project from end margins of the seat element but do not extend inwardly beyond a top face of the seat element. A swing assembly is also provided that includes a reinforced swing seat with a reinforcing member extending therealong and being encased therein. The swing assembly includes a pair of suspending elements coupled to hooks projecting from end margins of the seat for suspending the seat from a playset frame.
Owner:LEISURE TIME PROD LLC
Distribution network fault research and judgment method, device and system based on multi-system fusion
ActiveCN110635477AConducive to intelligent management and controlEnable Smart MergeFault location by conductor typesInformation technology support systemComputer scienceDistribution networks
The invention discloses a distribution network fault research and judgment method, device and system based on multi-system fusion. The method comprises the following contents: acquiring a power failure event signal from a corresponding system; and determining the corresponding research and judgment entrance for comprehensive research and judgment according to the power failure event signal and determining the type and the fault source of the power failure event. The system comprises an acquisition module which is used for acquiring the power failure event signal from the corresponding system;and a research and judgment module which is used for determining the corresponding research and judgment entrance according to the power failure event signal to perform comprehensive research and judgment and determining the type and the fault source of the power failure event. The device comprises a memory which is used for storing instructions; and a processor which is used for operating according to the instructions to perform steps of the method. The efficiency of fault research and judgment can be improved through multi-system fusion, and powerful conditions can be provided for subsequentmaintenance processes.
Owner:STATE GRID NINGXIA ELECTRIC POWER CO +1
Method for planning and designing debris flow drainage channels and applications thereof
InactiveUS20160040381A1Avoiding severe erosionMaximize protectionDamsClimate change adaptationMain channelEngineering
A method for planning and designing a debris flow drainage channel is provided. The position and total length of the drainage channel and a longitudinal slope of a gully bed of the drainage channel are determined. An inlet section, an outlet section and an acceleration section of the drainage channel are formed as fully lined channel type. After determining the length of the inlet section and the included angle between the side wall of the inlet section and the main channel, the length of the outlet section and the included angle between the side wall of the outlet section and the main channel, and the length of the acceleration section, the channel type and the length of the main channel section are also determined.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Photovoltaic rapid detection and accurate diagnosis method based on maximum power point tracking data
ActiveCN112327999AOvercoming power lossAvoid Power Outage Protection BehaviorPhotovoltaic energy generationElectric variable regulationRapid detectionReal-time computing
The invention discloses a photovoltaic rapid detection and accurate diagnosis method based on maximum power point tracking data. The method comprises the following steps: detecting abnormality based on instantaneous current drop of a maximum power point, and setting a threshold value while considering a sampling interval and a disturbance step length; utilizing the number of key working points andextreme points on a characteristic curve to distinguish occlusion and line faults, and further evaluating a fault degree; and according to a fault evaluation result, setting a working voltage to distinguish a fault string from a normal string so as to realize fault positioning. The detection method provided by the invention does not need to install additional data acquisition equipment, can be conveniently embedded into a commercial inverter, and is suitable for complex environments such as low irradiance, a low mismatch level and installation of blocking diodes, and meanwhile, extracted inflection point characteristics can effectively distinguish partial occlusion and line faults with similar characteristics, and unnecessary power-off protection is avoided. In addition, a fault positioning method provided by the invention can be used for quickly isolating the fault so that the safe operation of the system is ensured.
Owner:SOUTHEAST UNIV
Float switch type free flow discharge forecast device for upper reservoir dam of pumped storage power plant
InactiveCN103196521AMaintain safe operationReliable and fast feedbackLevel indicators by floatsElectricityWater level
The invention relates to a float switch type free flow discharge forecast device for an upper reservoir dam of a pumped storage power plant, and aims at providing the float switch type free flow discharge forecast device capable of raising the alarm reliably and quickly when free flow discharge occurs. The technical scheme provided by the invention is that the device comprises a control loop and an alarm loop, wherein the control loop comprises a relay, a control loop power supply and a float switch; the float switch is vertically fixed in an overflow dam section to be tested or near an upstream dam surface of the dam section, and achieves on-off according to a dam-front water level of the upper reservoir; one end of the control loop power supply is electrically connected with one end of a relay coil, and the other end is connected with the float switch in series and then electrically connected with the other end of the relay coil; the alarm loop comprises an alarm loop power supply; one end of the power supply is electrically connected with one contact reed of the relay, and the other end is connected with an alarm device in series and then electrically connected to another contact reed of the relay. The float switch type free flow discharge forecast device is suitable for hydraulic and hydro-power engineering.
Owner:POWERCHINA HUADONG ENG COPORATION LTD
Detection device for testing working state of substation SF6 sensor
PendingCN108362827AEnsure safetyMaintain safe operationGas analyser construction detailsPower gridEngineering
The invention provides a detection device for testing the working state of a substation SF6 sensor. The detection device comprises a gas storage mechanism for storing an SF6 gas and an SF6 sensor detection mechanism; a detection gas hood is provided with a gas inlet, the gas storage mechanism is provided a gas outlet, the gas outlet is provided with a control valve for controlling the output of the SF6 gas in the gas storage mechanism, and the output end of the control valve is connected with the gas inlet of the detection gas hood through a conduit; a test plate is arranged in the gas hood ofthe detection gas hood, and a display screen and a handle are arranged on the external surface of the detection gas hood; the display screen and the SF6 sensing tester are respectively connected withthe controller; and the controller obtains the concentration information of the SF6 gas in the gas hood through the SF6 sensing tester and displays the obtained concentration information on the display. The detection device for detecting the substation SF6 sensor has the advantages of shortening of the detection time, increase of the working efficiency, ensuring of the safety of personnel, ensuring of the detection accuracy, and maintenance of the safe running of a power grid.
Owner:BINZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER +1
Method for planning and designing debris flow drainage channels and applications thereof
InactiveUS10202731B2Avoiding severe erosionMaximize protectionDamsClimate change adaptationMain channelEngineering
A method for planning and designing a debris flow drainage channel is provided. The position and total length of the drainage channel and a longitudinal slope of a gully bed of the drainage channel are determined. An inlet section, an outlet section and an acceleration section of the drainage channel are formed as fully lined channel type. After determining the length of the inlet section and the included angle between the side wall of the inlet section and the main channel, the length of the outlet section and the included angle between the side wall of the outlet section and the main channel, and the length of the acceleration section, the channel type and the length of the main channel section are also determined.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Detection method and system of clone terminal devices
ActiveCN102546302ADiscovered in timeImprove accuracyData switching networksTerminal equipmentStructure of Management Information
The invention discloses a detection method and system of clone terminal devices, and the detection is performed on the basis of a network consisting of a front-end server and a certain number of terminal devices. The method comprises the following steps that: S1) the front-end server receives access applications of the terminal devices, performs conversation after key agreement and performs the conversation in a way allowed by different key interval agreements if the access applications of the same terminal devices exist; S2) the front-end server records and stores information of each terminal device and behavior information for communicating with the front-end server; and S3) whether the terminal device is cloned or not is judged by combining the information and behavior information of each terminal device. The detection system has a simple structure, the method is easy to operate, the clone devices can be found timely, the accuracy in clone detection is greatly improved, the clone detection period is shorted, and the detection method and system are conductive to the safety operation of the network and interests of network participants.
Owner:北京视博数字电视科技有限公司
Method and device for determining an operating parameter of a fluid insulated electrical apparatus
ActiveUS9903903B2Sure easyOperational securityTesting dielectric strengthHigh-tension/heavy-dress switchesElectrical devicesDielectric breakdown strength
A method for deriving at least one operating parameter of a fluid-insulated electrical apparatus, in particular of gas-insulated switchgear. The operating parameter is dependent on a dielectric breakdown strength of an insulation fluid of the electrical apparatus. The insulation fluid includes at least three components that are assigned to at least a first and a second component group such that at least one component group comprises at least two components. The component groups differ in their weighted average values of the molecular masses of the components in the respective component groups. At least one quantity which is indicative of the concentration of the first component group and of the concentration of the second component group is determined from the insulation fluid, e.g. by measuring one or more measurement variables with one or more sensors. The operating parameter is then derived using the at least one quantity.
Owner:HITACHI ENERGY LTD
Method And Device For Determining An Operating Parameter Of A Fluid Insulated Electrical Apparatus
ActiveUS20140306718A1Reduced insulation performanceReduce the amount requiredTesting dielectric strengthHigh-tension/heavy-dress switchesElectrical devicesDielectric breakdown strength
A method for deriving at least one operating parameter of a fluid-insulated electrical apparatus, in particular of gas-insulated switchgear. The operating parameter is dependent on a dielectric breakdown strength of an insulation fluid of the electrical apparatus. The insulation fluid includes at least three components that are assigned to at least a first and a second component group such that at least one component group comprises at least two components. The component groups differ in their weighted average values of the molecular masses of the components in the respective component groups. At least one quantity which is indicative of the concentration of the first component group and of the concentration of the second component group is determined from the insulation fluid, e.g. by measuring one or more measurement variables with one or more sensors. The operating parameter is then derived using the at least one quantity.
Owner:HITACHI ENERGY SWITZERLAND AG
Self-recovery system for cooling energy medium of heating furnace
ActiveCN104359323AClose the loopAchieving complete self-recyclingIncreasing energy efficiencyFurnace coolingSelf recoveryEngineering
The invention discloses a self-recovery system for a cooling energy medium of a heating furnace. The system is mainly designed by aiming at the situation that the cooling energy medium is not fully utilized by an existing heating furnace cooling system. According to the self-recovery system for the cooling energy medium of the heating furnace, a first outlet distribution header is connected to an outlet of an in-furnace water beam and is connected with a second outlet distribution header through a pipeline group; a generator set is arranged on the pipeline group; a vapor water mixture in the first outlet distribution header is conveyed to the pipeline group; the vapor water mixture in the pipeline group supplies energy required by the operation of the generator set and is output to the second outlet distribution header through the generator set. According to the self-recovery system for the cooling energy medium of the heating furnace, the vapor water mixture formed by vaporizing saturated water through the in-furnace water beam is converted into the saturated water through the generator set, the saturated water is recycled, and electric energy generated by the generator set can be used for the self-operation of the system.
Owner:HUATIAN ENG & TECH CORP MCC
multifunctional computer key
ActiveCN106444565BReduce labor intensityWork lessProgramme controlComputer controlVideo recordingMoisture sensor
The invention discloses a multifunctional computer key, which is characterized by comprising a computer key master device and a multifunctional photo and video slave device, wherein the computer key master device is connected with the multifunctional photo and video slave device through a pluggable piece; the computer key master device comprises a master device microprocessor, a power module, a master device USB (Universal Serial Bus) data interface, a temperature and humidity sensor, and a master device human-computer interaction module; the multifunctional photo and video slave device comprises a slave device microprocessor, a slave device USB data interface, a storage module, a recording module, a playback module, a camera and a slave device human-computer interaction module. According to the multifunctional computer key provided by the invention, video recording, photo shooting and sound recording functions can be realized through the multifunctional photo and video slave device, and after the device starts up, the multifunctional photo and video slave device automatically enters a real-time video recording and synchronous sound recording mode without the need for manual intervention, so that the convenience in operation on-spot record and transmission is realized, the accuracy of reported defects is effectively improved, the labor intensity and the work load of operation personnel are reduced, and the work efficiency is improved.
Owner:STATE GRID CORP OF CHINA +2
Heating furnace cooling energy medium self-recovery system
ActiveCN104359323BClose the loopAchieving complete self-recyclingIncreasing energy efficiencyFurnace coolingSelf recoveryEnergy recovery
The invention discloses a self-recovery system for a cooling energy medium of a heating furnace. The system is mainly designed by aiming at the situation that the cooling energy medium is not fully utilized by an existing heating furnace cooling system. According to the self-recovery system for the cooling energy medium of the heating furnace, a first outlet distribution header is connected to an outlet of an in-furnace water beam and is connected with a second outlet distribution header through a pipeline group; a generator set is arranged on the pipeline group; a vapor water mixture in the first outlet distribution header is conveyed to the pipeline group; the vapor water mixture in the pipeline group supplies energy required by the operation of the generator set and is output to the second outlet distribution header through the generator set. According to the self-recovery system for the cooling energy medium of the heating furnace, the vapor water mixture formed by vaporizing saturated water through the in-furnace water beam is converted into the saturated water through the generator set, the saturated water is recycled, and electric energy generated by the generator set can be used for the self-operation of the system.
Owner:HUATIAN ENG & TECH CORP MCC
A set of seawater desalination resource conditioning device
ActiveCN104211224BMaintain safe operationGood for healthSeawater treatmentMultistage water/sewage treatmentCo2 absorptionEngineering
Owner:NANJING CEC ENVIRONMENTAL ENGINEERING CO LTD
Systematic low-temperature plasma gas treatment tandem device
PendingCN109675417AExtended service lifeMaintain safe operationGas treatmentDispersed particle filtrationEngineeringFully automatic
The invention relates to a systematic low-temperature plasma gas treatment tandem device which comprises low-temperature plasma tandem treatment equipment 1, an exhaust fan 2 and a water scrubbing tower 3, wherein an air outlet of the low-temperature plasma tandem treatment equipment 1 is connected with an suction opening of the exhaust fan 2; an air outlet of the exhaust fan 2 is connected with the water scrubbing tower 3 through a ventilation pipeline; housings are connected with standard ground; and the low-temperature plasma tandem treatment equipment 1 is provided with a plurality of pieces of low-temperature plasma treatment equipment. The low-temperature plasma tandem treatment equipment comprises a stainless steel discharge pipeline 3, a quartz dual-medium discharge pipeline 8 andplasma generators 10. The systematic low-temperature plasma gas treatment tandem device has the benefits that: 1) various gas treatment manners are effectively tandem, so that the device can effectively treat various gases with complicated components, a service life of the equipment is prolonged, and safe operation of the equipment is maintained; 2) overhaul channels are reserved at the front partand the rear part, and the device is convenient and reliable to operate and overhaul; and 3) the experimental device is fully automatic in operation and improves experimental efficiency.
Owner:南京珀斯佩特电子科技有限公司
Float switch type free discharge measuring and reporting device for upper reservoir dam of pumped storage power station
InactiveCN103196521BMaintain safe operationReliable and fast feedbackLevel indicators by floatsElectricityPower station
Owner:POWERCHINA HUADONG ENG COPORATION LTD
Multipurpose combined protection transformer
ActiveCN110600247AHarm reductionHarm fromTransformers/reacts mounting/support/suspensionTransformers/inductances coolingTransformerEngineering
The invention provides a multipurpose combined protection transformer, and relates to the technical field of transformers. The multipurpose combined protection transformer comprises a transformer body, wherein the transformer body comprises a fixed base; protection side plates are vertically mounted at the positions of four edges of the upper end of the fixed base; a top plate is horizontally arranged at the upper ends of the protection side plates; a high-pressure sleeve and a low-pressure sleeve are mounted above the top plate; a lightning arrester is mounted on one side of the high-pressuresleeve; a fuse is arranged between the lightning arrester and the high-voltage sleeve; and two mounting frames are arranged at the lower end of the fixed base. In the multipurpose combined protectiontransformer, before the lightning arrester is installed in the high-voltage sleeve, damage caused by lightning can be effectively reduced, and safe operation of the transformer is maintained; the fuse is installed between the lightning arrester and the high-voltage sleeve, the fuse protects the transformer from damage caused by overcurrent, and the safety of the transformer is protected; and in addition, the whole device is stable in performance, and safe and reliable in action, no misoperation is generated, the whole device is convenient to install and disassemble, and the transformer is convenient to maintain.
Owner:湖南国丰电力设备有限公司
Rainproof strain insulator
The invention discloses a rainproof strain insulator. The rainproof strain insulator comprises a core rod, umbrella skirts, iron caps, reinforced rings, bearings, rain shielding plates, weight balanceapparatuses, bird-expelling needles and fixers; the umbrella skirts are fixedly arranged outside the core rod in a sleeving manner; the iron caps are fixedly arranged at the two ends of the core rodin a sleeving manner; the fixers are fixedly connected with the outer sides of the corresponding iron caps; the bearings are fixedly connected in the umbrella skirt connecting positions at the two ends; the rain shielding plates are fixedly connected with the top of the bearings through supporting rods; and the weight balance apparatuses are fixedly connected with the bottoms of the bearings through the supporting rods. By virtue of additional rain shielding plates outside the umbrella skirts, contact between the umbrella skirts and rain and snow in rainy and snowy days can be avoided, therebyavoiding corrosion to the umbrella skirts by rain and snow, avoiding a phenomena of umbrella skirt breaking caused by external force impact, reinforcing the protection effect on the core rod, prolonging the service life of the strain insulator, and maintaining safety operation of power transmission and transformation.
Owner:天津市世纪道康建筑科技有限公司
Research on sensor amplification circuit for magnetic field detection of power equipment
PendingCN111913138AMeet the design requirementsProven reliabilityAmplifier modifications to reduce noise influenceElectrical measurement instrument detailsElectric power equipmentHemt circuits
The amplifying circuit based on flux negative feedback is designed by using Multisim circuit simulation software, an amplitude-frequency characteristic curve and a phase-frequency characteristic curveof the amplifying circuit are analyzed, and the reliability of the amplifying circuit is verified. The research result can be used for amplifying the induced voltage at the two ends of the inductioncoil of the magnetic field sensor, widening the measurement frequency of the sensor and improving the sensitivity of the magnetic field sensor, and has great significance in maintaining the stable operation of the power cable, maintaining the online detection of the cable and maintaining the safe and stable operation of the power grid in China.
Owner:TIANJIN UNIV
Fire spraying gear real-time regulation and control system and corresponding terminal
InactiveCN112817276AMaintain safe operationSelf-control levelTotal factory controlProgramme total factory controlAutomatic controlAutomotive engineering
The invention relates to a fire spraying gear real-time regulation and control system and a corresponding terminal, and the system comprises a fire spraying execution device which is located in a ball body of a hot-air balloon and is used for executing fire spraying operation in the ball body so as to drive the ball body to ascend or descend; and a fire spraying driving mechanism which is connected with the fire spraying execution device and used for lowering the current fire spraying gear of the fire spraying execution equipment when receiving a gear lowering instruction; the fire spraying driving mechanism is further used for maintaining the current fire spraying gear of the fire spraying execution equipment when receiving the gear maintaining instruction. The fire spraying gear real-time regulation and control system and the corresponding terminal are safe and reliable, and have a certain self-control level. As the scene that the fire spraying flame area of the fire spraying execution equipment of the hot-air balloon is too large or even a driven balloon body is threatened can be detected in time, the fire spraying driving mechanism is automatically controlled to lower the fire spitting gear of the fire spraying execution equipment, and therefore safe operation of the hot-air balloon facility serving as a tourism project is effectively maintained.
Owner:徐敬媛
Photovoltaic rapid detection and accurate diagnosis method based on maximum power point tracking data
ActiveCN112327999BEasy to embedProtect safe operationPhotovoltaic energy generationElectric variable regulationData acquisitionEngineering
The invention discloses a photovoltaic rapid detection and accurate diagnosis method based on maximum power point tracking data, comprising the following steps: detecting abnormality based on the maximum power point instantaneous current drop, wherein the threshold value setting considers the sampling interval and the disturbance step size at the same time; The number of key operating points and extreme points on the characteristic curve distinguishes shading and line faults, and further evaluates the fault degree; according to the fault evaluation results, the operating voltage is set to distinguish faulty strings from normal strings, so as to realize fault location. The detection method proposed in the present invention does not need to install additional data acquisition equipment, can be easily embedded in commercial inverters, and is applicable in complex environments such as low irradiance, low mismatch level and installation of blocking diodes, and the extracted inflection point features can be Effectively distinguish partial occlusions and line faults with similar characteristics to avoid unnecessary power-off protection. In addition, the proposed fault location method can quickly isolate faults and ensure the safe operation of the system.
Owner:SOUTHEAST UNIV
Power transmission line maintenance ladder stand
PendingCN113964729AMaintain safe operationImprove securityApparatus for overhead lines/cablesControl theoryPower transmission
The invention belongs to the technical field of power transmission line maintenance, and discloses a power transmission line maintenance ladder stand which comprises a first ladder stand body, a second ladder stand body, a folding lock catch assembly and a hook assembly. One end of the folding lock catch assembly is connected with one end of the first ladder stand body, and the other end of the folding lock catch assembly is connected with one end of the second ladder stand body; the hook assembly comprises a hook body, a hook positioning piece and a hook locking piece. One end of the hook body is connected with the end, away from the folding lock catch assembly, of the first ladder stand body, the hook body can swing to the needed angle relative to the first ladder stand body, and one end of the hook positioning piece is connected with the hook body. One end of the hook locking piece is rotationally connected with the end, away from the first ladder stand body, of the hook body, the other end of the hook locking piece can be locked with the end, away from the hook body, of the hook positioning piece, and the hook body, the hook positioning piece and the hook locking piece can form a closed space. The power transmission line maintenance crawling ladder is high in safety coefficient and convenient to use.
Owner:GUANGDONG POWER GRID CO LTD +1
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com