9results about How to "Avoid catastrophic failure" patented technology

The invention relates to the technical field of fan blade safety monitoring, in particular to a fan blade clearance detection method based on a lightweight segmentation network, and the method comprises the steps: S1, collecting a plurality of pictures containing fan blades, and constructing a training set; s2, constructing an improved target detection network; s3, selecting a fan blade picture from the training set, and inputting the fan blade picture into the improved target detection network to obtain a detection result; s4, calculating the loss between the detection result and the real result, circulating the steps S3 to S4 until the total loss function is converged, and updating the weight of the improved target detection network; and S5, testing the trained target detection network to obtain a test result, and calculating to obtain a clearance value through the test result. According to the method, the CBAM attention mechanism is integrated in the third stage and the fourth stage in the backbone network, so that the feature perception capability of the backbone network is effectively enhanced.

The invention discloses a design method capable of giving consideration to both toughening and crack path controllability for a brittle material, and belongs to the technical field of fracture mechanics and artificial intelligence crossing, and the method comprises the steps: employing an input coding method based on space-response double-domain fusion to carry out feature extraction; introducing a channel attention mechanism to perform weighted fusion on the extracted double-domain features, and generating prediction results for different key tasks; evaluating the reliability of a prediction result by adopting a phase field verification and closed-loop adaptive optimization mode, and carrying out iterative training and optimization on the neural network; and taking the optimized neural network as a fitness evaluation function of double-target genetic optimization, and performing multi-target optimization on defect generation parameters. According to the invention, through fusion of the spatial domain and the response domain, geometric morphology and dynamic response characteristics are cooperatively extracted, and the prediction precision of complex fracture behaviors is improved; through non-dominated sorting multi-objective optimization under physical constraints, a high-toughness and path-controllable optimal solution is output, and brittle materials are pushed to cross an active controllable fracture design.

The application provides a method and device for monitoring the running state of a vehicle engine, a controller and a storage medium, wherein the method comprises: acquiring a monitoring signal of the vehicle engine in a running state in real time, performing sliding window slicing and normalization processing on the monitoring signal to generate a window sequence; inputting the window sequence into a trained feature extraction model to output an instantaneous latent vector, the feature extraction model being used to capture subtle changes of early weak faults of the engine in time domain, frequency domain and phase, and the instantaneous latent vector being used to compress and represent the current health state characteristics of the engine; outputting an early fault risk value through an early warning module, and outputting an early warning signal when the continuous multiple early fault risk values are all greater than a dynamic threshold. The application realizes the promotion of the detection granularity from the second-level overall energy to the millisecond-level transient state, greatly reduces the detectable signal-to-noise ratio threshold, and significantly improves the capture ability of early weak faults of the engine.

The application belongs to the technical field of special robots, and particularly relates to a high-integration anti-radiation main-backup redundant collaborative robot joint module, which solves the problem that a collaborative robot joint module cannot normally serve due to various radiation effects caused by ray ionization in a nuclear radiation environment; the joint module is composed of a module integrated by a mechanical structure and a redundant comprehensive electronic circuit system; the redundant comprehensive electronic circuit system comprises a low-voltage power supply system, a servo driving system, a communication system, a sensing and perceiving system, an MCU control system and a constant temperature system, and all of them are integrated with main-backup function modules; the main-backup function modules work independently; the MCU control system detects fault signals of the main-backup modules of each system, and controls automatic switching of the main-backup function modules in each system; the redundant comprehensive electronic circuit system of the application is highly integrated and mechanically and electrically assembled with the mechanical structure inside a joint module shell; the shell is made of radiation-resistant lightweight material, and each system inside the joint has high-integration redundancy, radiation resistance and independence.

The invention discloses a CFRP / metal composite paper folding thin wall filled automobile energy absorption box, and relates to the technical field of automobile passive protection safety, the CFRP / metal composite paper folding thin wall filled automobile energy absorption box comprises flange plates, and an energy absorption body is fixedly installed between the opposite faces of the two flange plates; the energy absorption body comprises a paper folding metal square tube, a carbon fiber square tube and polyurethane foam, the paper folding metal square tube is arranged on the peripheral face of the carbon fiber square tube in a sleeving mode, and the paper folding metal square tube is in interference fit with the carbon fiber square tube; and the polyurethane foam is filled in the carbon fiber square tube. According to the CFRP / metal composite paper folding thin wall filled automobile energy absorption box, the problems that a traditional energy absorption box is low in specific energy absorption, large in weight, weak in energy absorption capacity, poor in stability and the like are solved, the structure is simple, the initial peak force is low, the energy absorption performance is high, the stability is high, and injuries to passengers during vehicle collision can be relieved to the maximum extent.

The present invention relates to the technical field of wind turbine blade safety monitoring, specifically a wind turbine blade clearance detection method based on a lightweight segmentation network, comprising: S1, collecting multiple pictures containing wind turbine blades and constructing a training set; S2, constructing an improved target detection network; S3, selecting a wind turbine blade picture from the training set and inputting it into the improved target detection network to obtain a detection result; S4, calculating the loss between the detection result and the true result, looping from S3 to S4 until the total loss function converges, and updating the weight of the improved target detection network; S5, testing the trained target detection network to obtain a test result, and calculating the clearance value through the test result. The present invention incorporates the CBAM attention mechanism into the third and fourth stages of the backbone network, which effectively enhances the backbone network's ability to perceive features.

This utility model discloses an omnidirectional elastic vibration damping support structure for wind turbines, belonging to the technical field of wind power generation equipment. The structure includes a rear hinged vibration damping module and a front buffer limiting module. The rear module, through a rubber bushing fitted around the hinge pin, achieves a flexible hinge connection between the main load-bearing beam and the lower platform, used to buffer longitudinal and torsional vibrations. The front module, located between the front of the beam and the platform, includes rubber pads and limiting baffles in the vertical direction, as well as lateral rubber pads and limiting baffles in the horizontal direction, jointly achieving multi-directional vibration damping and displacement limitation. Through the synergistic effect of the front and rear modules, this utility model forms an omnidirectional elastic constraint system, which can effectively attenuate multi-dimensional vibrations generated during wind turbine operation, block the transmission of vibration energy to the tower, and significantly alleviate stress concentration at connection points, thereby improving the stability, safety, and service life of the wind turbine.

The invention discloses an underwater chemical reagent injection metering valve test platform and a test method. The test platform comprises a support assembly, a medicament supply assembly, a standard metering assembly, a metering valve assembly to be detected and a test system. A metering valve assembly to be detected is arranged on the supporting assembly, the standard metering assembly comprises an electromagnetic flowmeter, one end of the electromagnetic flowmeter is connected with an outlet of the pressure regulating valve, and the other end of a liquid inlet pipeline of the electromagnetic flowmeter is connected with an inlet pipeline connector of the metering valve assembly; the liquid inlet pipeline is connected with the liquid inlet end of the differential pressure gauge I through a branch pipe, and a four-way pipeline is arranged on the liquid inlet pipeline; a backflow pipeline is arranged on an outlet pipeline connector of the metering valve assembly and connected with the liquid outlet end of the second differential pressure gauge through a branch pipe. One end of the four-way pipeline is connected with the pressure transmitter, one end of the four-way pipeline is connected with the liquid inlet pipeline, and the other two ports are respectively connected with a liquid outlet pipe orifice of the differential pressure gauge I and a liquid inlet pipe orifice of the differential pressure gauge II; and a backflow pipeline valve communicated with the medicament storage box is arranged on the backflow pipeline.

The invention relates to the technical field of breather valves, in particular to a breather valve operation monitoring method and system.The breather valve operation monitoring method is characterized in that a pressure sensor and a temperature sensor are arranged on a cavity, and the following core steps are executed: firstly, the current temperature Tn and pressure Pn in the cavity are obtained; secondly, the current ventilation rate is calculated according to the pressure change in the cavity cooling process and compared with the rated ventilation rate, and if the current ventilation rate is lower than a rated value which is equal to the first threshold value k1 or the second threshold value k2, a ventilation valve performance alarm (k1gt, k2) is output; and finally, according to the current temperature Tn, querying a reference pressure-temperature corresponding relation to obtain a standard pressure P0, and if the current pressure Pn is lower than the standard pressure P0 which is equal to a third threshold k3 or a fourth threshold k4 and exceeds a corresponding set time, outputting a ventilation valve state alarm (k3gt, k4). And real-time and accurate diagnosis and early warning of performance degradation and damage faults of the breather valve are realized.