50results about How to "Clear logic" patented technology

The utility model discloses an interactive hand clamping mechanism, which comprises an X-axis cross beam, an X-axis cross beam, an X-axis cross beam, a Y-axis cross beam, a Y-axis cross beam, a Y-axis cross beam and a Y-axis cross beam, the upper clamping hand module reciprocates along the X-axis cross beam in the upper clamping hand moving area; the upper clamping hand module comprises an upper clamping hand, an upper clamping hand X-axis translation seat and a Y-axis driving unit; the Y-axis driving unit drives the upper clamping hand to extend towards one side part of the X-axis cross beam to wait for materials and to retract to avoid one side part deviating from the X-axis cross beam; the lower clamping hand module reciprocates along the X-axis cross beam in the lower clamping hand moving area; the lower clamping hand module comprises a lower clamping hand, a lower clamping hand X-axis translation seat and a Z-axis driving unit for driving the lower clamping hand to move in the Z-axis direction relative to the lower clamping hand X-axis translation seat; and the Z-axis driving unit drives the lower clamping hand to ascend for material waiting and descend for avoiding. The structural compactness, the movement precision, the working stability and the structural reliability are improved.

The application relates to the field of industrial automation and discloses a data management method and system for laser galvanometer testing, the method comprising: acquiring multi-source error data such as temperature and vibration and performing standardization processing; clustering the data to identify a representative error mode; obtaining an association path of error causes through association rule mining; further extracting deep features to determine the priority of error sources; combining dynamic environment variables to perform simulation verification, generating an error cause model, and formulating an optimization decision rule set based on the model; and finally applying the rule set to adjust system control parameters. The application can realize effective fusion of multi-source heterogeneous error data and accurate tracing of error causes, thereby improving the positioning accuracy and operation stability of a laser galvanometer system.

This invention relates to the field of chip inspection technology, and more particularly to a chip non-destructive testing system based on embedded current scanning. The system includes a current scanning module, an information acquisition module, a data analysis module, an abnormal scanning region generation module, and a scanning path generation module. Instead of simply performing a higher-density secondary scan of the entire chip, this invention intelligently filters out abnormal scanning regions requiring special attention based on the initial scan results and calculates their scanning priority. This allows valuable inspection time and computing resources to be concentrated on the most suspicious and severe areas, avoiding unnecessary repeated scanning in normal areas. The system dynamically selects the optimal scanning path based on the regularity of the region shape; for example, parallel lines are used for regular regions, and radial lines are used for irregular regions. This makes the scanning path more closely match the geometric features of the defect, obtaining a more complete region characterization with fewer scanning points, resulting in higher path planning efficiency.

This invention discloses a rapid prediction method for rail rolling contact fatigue damage in the field of rail damage prediction technology. The method includes establishing a three-dimensional elastoplastic wheel-rail cyclic rolling contact finite element model, improving the cyclic plastic constitutive model, and simulating the stress-strain evolution of the rail. A rail stress-strain sample library is generated through parametric sampling and batch calculation. A Physically Constrained Generative Adversarial Network (PC-GAN) is constructed, embedding physical constraints such as contact force conservation and energy consistency into the loss function to achieve rapid and high-precision mapping from operating parameters to the stress-strain field. Based on the PC-AN prediction results, cumulative damage and fatigue life are calculated using an incremental multiaxial fatigue damage model, and a damage distribution map of the entire rail line is drawn, identifying high-risk sections. This invention deeply integrates physical modeling with intelligent algorithms, achieving an order-of-magnitude improvement in rail fatigue damage assessment efficiency while ensuring prediction accuracy, providing efficient and reliable technical support for rail life assessment and maintenance decisions across the entire rail line.

This invention discloses a clothes drying rack drive reset system and reset method, including a control circuit, two winding reels synchronously driven by a lifting motor, and steel wire ropes extending from each winding reel to both sides. Each side of the winding reel is equipped with a slack trigger connected to the control circuit, and a tensioning device is provided between the slack trigger and the steering wheel. When the slack trigger detects that the passing steel wire rope is slack, it triggers a signal to the control circuit, which then controls the lifting motor to stop rotating and the drying rack to stop rising. When the control circuit receives a reset command, it controls the driver to drive the first rotating wheel seat to tighten the slack steel wire rope to a taut state. At this time, the slack trigger can trigger a signal to the control circuit to put the lifting motor in a standby state. After receiving a user's descent command, the control circuit controls the lifting motor to reverse and lower the drying rack. The structure is simple, the operation logic is clear, and it is easy for users to operate, facilitating subsequent maintenance.

The invention provides a gas leakage risk monitoring and early warning method considering a multi-accident coupling risk, and relates to the technical field of urban gas pipeline safety monitoring, and the method comprises the following steps: determining a multi-accident risk factor set related to gas leakage, the risk factors are divided into four categories of pipeline body factors, environmental factors, operation and maintenance management factors and multi-accident coupling factors; respectively calculating the subjective weight and the objective weight of each risk factor by adopting a combined weighting method combining an analytic hierarchy process and an entropy weight method to obtain a comprehensive weight; constructing a coupling effect strength model, calculating a coupling coefficient between different types of risk factors, and representing an amplification effect of multi-accident interaction on the gas leakage risk; according to the gas leakage risk monitoring system, the multi-accident coupling factor is introduced into the gas leakage risk monitoring system, the system covers the four risk factors of the pipeline body, the environment, the operation and maintenance management and the multi-accident coupling, and the problems that a traditional method is incomplete in risk coverage and neglects the coupling effect are solved.

The invention discloses an air filtering and deodorizing system for livestock breeding, and relates to the technical field of air purification. The system comprises a box body and a fan for driving airflow, wherein a water curtain mechanism, a water vapor removing mechanism and a filter element layer are sequentially arranged in the box body along the airflow direction. The water curtain mechanism comprises a rotatable outer net cylinder and an inner filter cylinder capable of axially moving, a rotary driving assembly is matched with an axial driving assembly, a water curtain is formed in combination with a water supply assembly, and composite self-cleaning of rotary centrifugation, mutual friction, axial scraping and high-pressure water flushing is achieved. And the problem of wet curtain argillization and blockage caused by high-load dust meeting water is fundamentally solved. The water vapor removing mechanism is used for removing water in the air flow through a water absorbing piece capable of rotating and extruding and regenerating on line. According to the invention, continuous and efficient air filtration and deodorization are realized, and continuous and stable operation of the system under complex breeding working conditions is ensured.

This application relates to a joint estimation method for wireless communication delay and frequency offset based on hill-climbing fine search. The method includes: setting a time offset search range, a frequency offset search range, a coarse search step size, and a fine search step size based on prior information; generating a two-dimensional grid point set within the search range according to the coarse search step size; calculating the cost value of each grid point based on a cost function; taking the time offset and frequency offset corresponding to the maximum value as the coarse estimate; using the coarse estimate as the initial point, performing fine search iterations using hill-climbing; calculating the cost value of multiple candidate points in the neighborhood in each iteration, comparing and determining the update direction, and updating the current time offset and / or frequency offset; repeating the iteration until a preset exit condition is met, and outputting the final estimate. This application effectively solves the parameter coupling problem of traditional step-by-step estimation in NTN scenarios, while balancing search range and computational complexity, facilitating engineering implementation, and being applicable to various NTN systems and terminal forms.

The invention provides an industrial park innovation atmosphere evaluation method and system, and the method comprises the steps: carrying out the data preprocessing of an obtained initial historical live-action image set, and obtaining a target historical live-action image set; a multi-level industrial park innovation atmosphere evaluation system comprising a target layer, a criterion layer and an index layer is constructed, the target layer is used for defining an overall target of industrial park innovation atmosphere evaluation, and the criterion layer is used for disassembling the defined overall target of the target layer into two types of intermediate dimensions, namely visual feeling and element characteristics; the index layer is used for determining specific indexes with pertinence for each dimension of the criterion layer; scoring the target historical live-action image set according to the multi-level industrial park innovation atmosphere evaluation system to determine an evaluation criterion, and determining a core MLLM evaluation model according to the evaluation criterion; and based on the core MLLM evaluation model, establishing an automatic innovation atmosphere evaluation framework according to organic fusion of core driving subject identity definition, evaluation view and corresponding priority evaluation indexes.

The invention discloses a biological specimen interactive keyboard system of modular hardware and a working method thereof, the system is composed of three modules: a specimen integrated keyboard module adopts a special keycap to package an entity biological specimen, and the specimen is used as a physical interface capable of triggering interaction; the multi-modal image acquisition module is fixed above the keyboard through a mechanical bracket, integrates visible light and infrared imaging units, and accurately acquires the characteristics of a specimen; the local processing and interaction control module serves as an off-line intelligent center, a local resource library and a special processing circuit are arranged in the local processing and interaction control module, feature matching and information output are achieved, all the modules cooperatively work through physical connection (such as a USB interface and an HDMI interface), and an independent hardware assembly line is formed. The system has the advantages of high integration, off-line operation, natural and smooth interaction and high reliability, and is suitable for teaching, scientific research, exhibition and other scenes.

The application belongs to the technical field of wind tunnel test, and discloses a semi-mould loading device control system and a control method thereof. The semi-mould loading device control system is used for controlling four electric cylinders of the semi-mould loading device, and realizes Fx, Fy, Mx, My and Mz value loading of the semi-mould balance through the four electric cylinders. The semi-mould loading device control system takes a main control computer and an embedded ARM controller as a core control unit, is responsible for collection and processing of all signals, controls a running position of the electric cylinder, and has a prompt function of motion and state. The semi-mould loading device control system comprises the main control computer, the embedded ARM controller and control circuits corresponding to the electric cylinders. The control method comprises power-on self-checking of the control system, load rationality inspection, calculation of a tensile and compressive force sensor target value, current loading direction loading, current loading direction unloading, loading direction replacement and completion of all load group loading. Through automatic control, simple and convenient operation is realized.

An active protection method and system for internal faults in an on-load tap changer of a converter transformer includes: determining the start time of on-load tap changer operation and then extending the time interval; identifying ultra-high frequency (UHF) and high frequency (HF) pulse signals and discharge pulse times exceeding a set threshold within the extended time interval; identifying whether the on-load tap changer is adjusting a polarity-crossing or non-polarity-crossing tap position; determining the internal abnormality of the on-load tap changer based on the UHF and HF pulse signals and their pulse times during operation; and further issuing "general alarm," "serious alarm," or even "protection trip" signals based on the severity of the internal partial discharge detected by the UHF and HF signals. This invention fundamentally avoids false alarms and trips in monitoring or protection devices caused by discharge during normal tap changer operation. Furthermore, it achieves a leap from "passively preventing false operation" to "actively detecting faults," proactively preventing damage to the on-load tap changer itself or even transformer explosions caused by its faults.

The invention discloses an EEG-based state anomaly detection method and system, a terminal and a medium, and belongs to the technical field of brain-computer interfaces. The method comprises the steps that electroencephalogram signals of a user are collected in real time and preprocessed, and power spectrum density characteristics of a preset frequency band and an inter-brain phase synchronization index are extracted; inputting the features into a tensity quantification model to obtain continuous tensity scores; on the basis of the tensity score and the power change trend of the specific electroencephalogram frequency band, dynamic calibration is carried out in combination with historical baseline data of a user individual, and whether the user is in a violent stress abnormal state or not is judged according to a preset multi-level judgment rule; and if the judgment result is abnormal, triggering a response action. According to the method, through continuous quantification of the tensity, construction of a'tensity-violent state 'strong correlation model and individual dynamic calibration, high-precision, low-delay and low-misjudgment-rate abnormal state recognition is realized, and the method is particularly suitable for home security, public security and vulnerable group protection.

This invention discloses a method and system for local differential privacy aggregate value data aggregation based on sketches and sampling, belonging to the field of privacy computing and big data analysis technology. The method includes: initializing and disclosing sketch structure parameters on the server side; constructing aggregate value data on the user side, randomly selecting counter indices and determining the hash collision set; randomizing the hash collision set elements on the user side according to the aggregation function type, calculating the hit rate and performing adaptive pruning; reporting triples on the user side; and accumulating and updating the sketch counter on the server side, calculating the aggregated statistics through median estimation. This invention replaces traditional multi-element perturbation with sketch sampling and lightweight reporting, without requiring additional privacy budget consumption, effectively solving the noise accumulation problem, significantly reducing computational and communication overhead, and achieving a balance between privacy protection and statistical utility.

The application discloses a porous array vortex-inhibiting water gap structure applied to a flow channel and a design method thereof, and belongs to the technical field of casting equipment. The porous array vortex-inhibiting water gap structure comprises a water outlet unit fixedly embedded at a water outlet position of the flow channel, and a plurality of porous arrays are arranged on a water outlet end surface of the water outlet unit. The porous array vortex-inhibiting water gap structure is composed of at least two water outlet through holes, and all the water outlet through holes are arranged in a central symmetry around a geometric center of the water outlet unit. The application can destroy the generation condition of the vortex, thereby reducing the slag entrapment and air suction, and improving the ingot quality.

The invention relates to a pressure system micro-leakage online monitoring method and device, equipment and a storage medium, and the method comprises the steps: obtaining the identity information of a to-be-monitored pressure system, associating the identity information with the monitoring process, and generating a bound monitoring task; performing pressure initialization; acquiring reference state data (reference pressure and reference temperature) of the to-be-measured pressure system and starting monitoring; in the micro-leakage monitoring process, actual state data of the to-be-measured pressure system at the current moment are circularly obtained and recorded at a preset time interval, and the actual state data comprise an actual pressure value and an actual temperature; according to the reference pressure, the reference temperature and the actual temperature, calculating a theoretical pressure value in a leakage-free state at the current moment; comparing the actual pressure value with the theoretical pressure value to obtain a pressure difference, and judging whether the pressure system leaks or not according to the pressure difference to obtain a monitoring result. The method has the effect of improving the accuracy of the micro-leakage monitoring result of the pressure system.

The invention belongs to the technical field of nano material preparation, discloses a zero-dimensional perovskite nanocrystalline large-scale preparation method based on a room-temperature self-assembly strategy, and aims to solve the technical problems that in the prior art, the uniformity of a product is poor, high luminous efficiency and conductivity are difficult to achieve at the same time, and the wavelength cannot be accurately regulated and controlled. According to the method, a water-in-oil microemulsion system is adopted as a nanoreactor, and the high uniformity of nanocrystal growth is fundamentally guaranteed through a confinement reaction. The composition creatively comprises two ligands: one ligand is a pi-conjugated conductive main functional ligand with surface passivation and charge transfer functions, which solves the problem of poor conductivity caused by the traditional insulating ligand while ensuring high photoluminescence efficiency, and the other ligand is a competitive tuning ligand which forms dynamic competitive balance with the main ligand. The key problems of product uniformity, conductivity, wavelength controllability and the like are synergistically solved, and the prepared nanocrystal has high optical purity, high quantum yield and excellent conductivity.

The invention discloses a general atomic cross-chain switching method for relieving abort attacks. The invention provides a ShieldSwap scheme for solving the problem that an existing signature-based cross-chain switching scheme is prone to being subjected to abort attacks of participants, and consequently asset locking or switching fails. The method is characterized by comprising the following steps of: firstly, designing a reverse freezing mechanism, and inhibiting an attack motivation of an aborting party by enabling the assets of the aborting party to face longer locking time; secondly, recombining a working process, and completing all signature commitment steps under a chain to avoid an early-stage on-chain locking risk; and finally, a fair completion mechanism is adopted to ensure that the two parties can independently generate final exchange signatures after the assets are frozen. The method is based on general primitives such as adapter signature and verifiable discrete logarithmic time, does not depend on a script function of a specific chain, has high security and strong universality, can effectively guarantee atomicity and fairness of cross-chain exchange, and is suitable for decentralized asset exchange scenes among various block chains.

The invention discloses a dynamic delay compensation control method for an electro-hydrostatic actuator, and the method achieves the effective compensation of a dynamic lag characteristic through constructing a set of control flow which comprises expected acceleration generation, delay disturbance estimation, disturbance feedback correction, target pressure derivation and control voltage calculation. The method is suitable for an electromechanical hydraulic execution system with a delay characteristic, and the response speed and robustness are improved while the control precision is guaranteed; according to the invention, the tracking performance and stability of the actuator under a high-dynamic working condition are improved, and the method is especially suitable for a mechanical-electrical-hydraulic integrated system with high requirements on response speed and control precision.

The application discloses a kind of gearboxes shift control fault diagnosis system and method of multiple gear of vehicle, including fault diagnosis module before shifting, fault diagnosis module in shifting and fault diagnosis module after shifting;The fault diagnosis method described in the application can quickly and effectively identify the jamming of shift motor, the timeout of shift motor, the excessive speed of synchronizer two ends during shifting process;While real-time monitoring the operating state of external driving motor.The fault diagnosis method has undergone 100,000 times of shifting durability test on test bench, when failure occurs, shift is prohibited according to the corresponding fault protection mechanism or returns to the original position to re-engage or shift back;While meeting the shifting function, the hardware structure can be well protected, and the vehicle enters the Retry protection strategy when the trigger synchronization speed difference is too large during the actual shifting process, i.e., it returns to neutral, and the logic control process of re-engaging is controlled.In the meantime of ensuring the quality of shifting, the hardware is fully protected from being damaged.

This invention relates to the field of automotive control methods, specifically to a method for estimating the driving range of a pure electric vehicle. The method comprises the following steps: S1, obtaining the real-time power consumption and remaining battery power of the vehicle's auxiliary components; S2, dividing the vehicle's historical mileage into short and long mileage segments according to a set distance, and calculating the average motor power consumption for the short and long mileage segments respectively; S3, calculating the current average motor power consumption based on the average motor power consumption for the short and long mileage segments and their respective weighting coefficients; S4, calculating the remaining driving range of the electric vehicle based on the current average motor power consumption, remaining battery power, and real-time power consumption of the auxiliary components. The method for estimating the driving range of a pure electric vehicle in this application is simple. By distinguishing between short and long mileage segments and calculating the average motor power consumption for each segment, the final driving range is calculated. This method considers the power consumption characteristics of the motor under different mileage segments, resulting in a more accurate calculation.

The invention belongs to the technical field of electronic equipment reliability analysis, and particularly relates to an electronic equipment multi-physical field reliability evaluation method based on data driving. A traditional reliability analysis method has obvious defects in coping with the multi-physics field coupling problem, and the defects are effectively overcome through organic combination of a systematic data analysis method and a multi-physics field coupling simulation technology. The method comprises the following steps: firstly, establishing a complete reliability evaluation system, and further adopting a technical path of fusing theoretical calculation and numerical simulation to realize accurate reliability analysis of the electronic equipment under the action of multi-physics field coupling. The method has the advantages of being good in economical efficiency, high in efficiency and high in practicability, the reliability level of the electronic equipment can be rapidly and accurately evaluated, and an innovative reliability analysis technical scheme and engineering practice support are provided for the industry.

The invention discloses a three-path NTC broken line detection circuit applied to a PCS product, which is used for broken line detection during temperature detection of an IGBT module, and comprises a power supply module circuit, a partial voltage detection circuit, a comparator output circuit, a third voltage-regulator tube and an alarm signal output circuit, the power supply module circuit is connected with a power supply, and is electrically connected with the alarm signal output circuit through the power supply module circuit, the partial voltage detection circuit, the comparator output circuit and the third voltage-regulator tube in sequence; the partial pressure detection circuit comprises a first thermistor, a second thermistor and a third thermistor; the beneficial effects are that the circuit has the core advantage of being capable of automatically detecting disconnection or poor plugging faults of any NTC sensor (the first thermistor, the second thermistor and the third thermistor) in A, B and C phases in real time. Once such a fault occurs, the circuit can immediately generate a clear and high-level alarm signal and directly transmit the alarm signal to a control system.

A dual-mode photocatalytic reactor based on the biomimetic structure of *Hylocereus undatus* is disclosed, relating to the field of industrial waste gas purification technology. The reaction unit mimics the spherical multicellular aggregate structure of *Hylocereus undatus*, which efficiently utilizes light energy and promotes material exchange. This constructs a novel device that can simultaneously enhance light energy capture, optimize the reaction flow field, and achieve modular maintenance, thereby improving energy utilization efficiency, mass transfer performance, and ease of operation.

The invention provides a stacking machine multi-type tray identification and detection system and method, and the method comprises the steps that a cargo carrying table tray type identification and goods allocation position binding module receives task information of an upper computer, and analyzes the task information to obtain a task tray type and a target goods allocation position; the actual tray type identified by the sensor group on the cargo carrying table is compared with the task tray type; if yes, the task tray type and the target goods allocation position are logically bound; the multi-sensor cooperation and difference detection module collects real-time data; the PLC performs time synchronization and fusion analysis on the real-time data to obtain a fusion result; comparing the fusion result with a preset standard value to obtain a comparison result; identifying the type of the tray and the state of the tray according to the comparison result; the tray multi-dimensional detection integration module performs detection according to the tray type and position after binding of the previous tray type and the cargo position, and calls a corresponding logic block to perform detection to obtain a detection result; and determining to execute operation or alarm according to the detection result.

The application discloses a kind of integrated traffic network key node fast identification method of fusing node inherent attribute and multi-order influence propagation, including data preparation, node type factor calculation, multi-order neighbor node influence propagation mechanism construction, node importance value iterative convergence calculation, network key node identification five steps.The application calculates different node type factor according to the characteristic index of different single mode subnetwork, determines the multi-order neighbor node set of each node by breadth-first search algorithm, calculates the propagation path between node and different neighbor node according to shortest path search algorithm, improves PageRank algorithm by fusing node inherent attribute value, node type difference and multi-order neighbor node influence, calculates the importance value of node by convergence iteration, realizes the fast identification of integrated traffic network key node, and can be applied to large-scale complex traffic network field, and lays a foundation for subsequent development integrated traffic network key infrastructure protection and resilience promotion.

The application discloses a kind of 5G uplink real-time video transmission oriented time delay compensation control method and system, belong to wireless network real-time video transmission optimization technical field.The application is to solve the problem of time delay inaccuracy and control misjudgment caused by base station scheduling waiting, batch resource release and link layer retransmission in 5G uplink real-time video transmission, by sending end disabling step module to realize video frame burst transmission, and using the flow pattern analysis of receiving end and uplink scheduling estimation to identify scheduling additional influence, construct scheduling additional occupancy ratio to generate correction time delay and feedback to sending end for controller adaptation.The application can estimate and compensate the additional time delay component related to wireless scheduling waiting, batch resource release and potential link layer retransmission, improve the accuracy of sending end in judging real link state, with the advantages of low engineering modification cost, strong commercial adaptability and low computational complexity.

The application relates to a TBM tunnel deep-buried central water ditch synchronous construction method and equipment, temporary support trusses are erected behind the TBM, inverted arch precast blocks are laid behind the temporary support trusses, and a tunnel base without inverted arch covering is reserved between the temporary support trusses and the inverted arch precast blocks; waterproof operation racks and lining trolleys are arranged on the top of the inverted arch precast blocks, waterproof plates, steel bars and secondary lining construction are carried out; meanwhile, a simple inverted arch trestle is arranged at the tunnel base without inverted arch covering, a deep-buried central water ditch is drilled and excavated below the simple inverted arch trestle, and a pipe section is hoisted into the deep-buried central water ditch; inverted arch precast blocks are continuously laid on the top of the deep-buried central water ditch; the temporary support trusses are removed, the simple inverted arch trestle is moved to the next cycle of the temporary support trusses and the newly laid inverted arch precast blocks, and the next cycle of construction is continued. Through process reorganization and space reconstruction, the application forms reasonable space occupation and interface closed loop, and directly solves the problem that the deep-buried central water ditch cannot be constructed synchronously with the TBM tunneling.

This invention relates to a SLM forming method based on dot-ring laser, comprising: dividing a three-dimensional model of the product to be formed into an outer contour region, an inner contour region, and a filling region nested from the outside in; slicing the outer contour region, inner contour region, and filling region along the Z-axis into multiple outer contour slice layers, multiple inner contour slice layers, and multiple filling slice layers, respectively; formulating a corresponding forming strategy according to the characteristics of each slice layer; and completing the forming process of each slice layer according to the formulated forming strategy; wherein, at least a portion of the outer contour slice layers are formed using a dot-ring laser in dot mode at a first set power; at least a portion of the inner contour slice layers are formed using a dot-ring laser in dot-ring cooperative mode at a second set power; and at least a portion of the filling slice layers are formed using a dot-ring laser in dot-ring cooperative mode at a third set power. The invention also relates to formed metal parts produced based on this SLM forming method. This invention proposes a triple-nested slicing scheme of "outer contour region - inner contour region - filling region," formulating a corresponding forming strategy according to the characteristics of each slice layer, and constructing a logically clear and highly efficient collaborative scanning system, significantly improving the overall forming efficiency and quality from the process path.

The invention discloses a method and system for determining a short-circuit demagnetization checking scene of a permanent magnet wind driven generator, and relates to the technical field of permanent magnet wind driven generators, and the method comprises the steps: obtaining a joint probability density function of the wind speed of a target wind field and the environment temperature; determining a plurality of candidate check scenes according to the joint probability density function; respectively calculating the output power of the permanent magnet wind driven generator after the short-circuit fault occurs in each candidate checking scene; constructing an expected value equation based on the joint probability density function and the output power; and solving the expected value equation, and determining the candidate check scene corresponding to the wind speed value and the environment temperature value satisfying the equation as a final short circuit demagnetization check scene. According to the method, the problems that the design of the permanent magnet wind driven generator is too conservative and the power density improvement is restricted due to the fact that a minimum probability scene is adopted as a checking reference in the prior art are solved, and the power density of the permanent magnet wind driven generator can be effectively improved on the premise that the overall output reliability is ensured.