12results about How to "Prevent wrong action" patented technology

The invention discloses a fault position identification method and system based on a new energy power system, and the method comprises the steps: collecting fault data in a new energy power system line, extracting fault currents at two sides of the line according to a fault scene, and carrying out the EMD decomposition of the fault currents, thereby extracting the fault features of a system side IMFsi and a station side IMFwi; selecting IMF components with fault feature representativeness to carry out Kendall correlation coefficient calculation; a weighting coefficient mi corresponding to the Taui is constructed, a protection relevancy value rho is constructed in combination with the correlation coefficient Taui, optimization solution is conducted on the weighting coefficient mi through a raccoon longnose optimization algorithm COA, and therefore the optimized weighting coefficient mi is determined; and determining a protection constant value sigma according to the protection relevancy value rho, and further judging whether the fault is an internal fault or an external fault by adopting the protection constant value rho. According to the method, the criterion construction is completed by utilizing different fault characteristics of two sides of the system after decomposition when the system fails and performing similarity calculation, and the criterion accuracy is improved by combining an optimization algorithm, so that the protection principle is realized.

The invention discloses an unmanned aerial vehicle obstacle avoidance method, system and device based on reinforcement learning and differential programming and a medium. The obstacle avoidance method comprises the following steps: constructing an unmanned aerial vehicle state matrix s; constructing a task neural network module, and obtaining an expected flight vector fexp of the unmanned aerial vehicle according to the unmanned aerial vehicle state matrix s; constructing a differentiable safety module, correcting an expected flight vector fexp of the unmanned aerial vehicle according to the obstacle position, and obtaining an actual flight direction vector ffly of the unmanned aerial vehicle; the task neural network module and the differentiable safety module are combined in a mode that the task neural network module is in front of the differentiable safety module, an unmanned aerial vehicle obstacle avoidance strategy network is constructed, an unmanned aerial vehicle simulation flight environment is established, the unmanned aerial vehicle obstacle avoidance strategy network is trained, and an available unmanned aerial vehicle obstacle avoidance strategy is obtained; the system, the device and the medium are used for bearing and implementing the method. Safe flight of the unmanned aerial vehicle is achieved in the simulation environment, the advantages of an intelligent algorithm and a traditional obstacle avoidance algorithm are integrated, and therefore the safety of the unmanned aerial vehicle in the task execution process is improved.

The application relates to the technical field of sports training and discloses an intelligent sensing and feedback personalized sports training guidance system, which comprises a dynamic interactive field sensing module, a data processing and analysis module, an immersive feedback module and a personalized model evolution module; the sensing module collects real-time interactive data through an intelligent training pad integrated with pressure and vibration sensors; the data processing and analysis module is internally provided with a predictive intention engine, which can evaluate a posture before a user action and trigger a feedforward early warning, and calculate an actual motion track of the user after the action, namely a fact path; the personalized model evolution module maintains a baseline model based on historical best performance of the user, and the data processing module calls the model to generate an idealized counterfactual path; the immersive feedback module presents an early warning signal on the training pad and synchronously visualizes playback of the fact path and the counterfactual path. The application realizes high self-adaptation and personalization of training guidance and significantly improves training efficiency.

With the wide access of four-quadrant power supply represented by battery energy storage station and flexible HVDC system into power grid, the complex fault characteristics of the four-quadrant power supply bring challenges to traditional relay protection, resulting in the failure of traditional current differential protection. In order to solve this problem, a protection method based on Hough fault coefficient is disclosed. The protection method uses the improved Hough transform to extract the slope of the two-dimensional current trajectory, and selects three specific slope angles to construct the Hough fault coefficient to quickly and sensitively identify the internal and external faults. The Hough fault coefficient shows excellent reliability when facing various internal fault conditions on the AC tie line of the four-quadrant power supply, and ensures the safety of the protection in the presence of non-ideal working conditions such as CT saturation, CT error, synchronization error, noise and abnormal value.

The invention discloses skiing professional action multi-dimensional capture bracelet and foot ring combined equipment which comprises a left bracelet body and a right bracelet body which are worn on the two wrists correspondingly, and a left foot ring body and a right foot ring body which are worn on the two ankles correspondingly. An inertial measurement unit, a flexible display screen, a vibration motor and a Bluetooth module are integrated in each main body; and a main control chip is also arranged in the left hand ring main body and is wirelessly connected with the other three main bodies through a Bluetooth module so as to receive and process motion data synchronously acquired by the four point positions and generate a multi-dimensional skiing action model. Through four-limb multi-point synchronous capture, in combination with real-time display and vibration feedback, the gravity center transfer and limb postures of the skier can be precisely restored, an athlete is helped to correct wrong actions in time, and the method is suitable for action analysis and technology improvement in skiing training.

The present invention relates to a standardized correction method for volleyball technical movements. First, a batting video of a practitioner is recorded, key frames or pictures of the practitioner and standard movement videos are extracted, and the practitioner's movements and standard movements are identified using the OpenPose algorithm to identify key points of human body postures; then, the angle values ​​of the angles between specific joints of the human body are calculated, and the differences between the practitioner's movements and standard movements are compared, so that the practitioner's movements are corrected according to the analysis results. By using the method of the present invention, volleyball practitioners can not only prevent injuries caused by wrong movements, but also improve their volleyball technical level in a more scientific way, thereby laying a solid foundation for volleyball technology.

The invention provides an intelligent interaction robot for auxiliary exercise of mentally retarded children, and relates to the field of robots. The intelligent interaction robot comprises a robot body, the robot body comprises a hardware system, a software system and an auxiliary system, a mechanical structure, a sensor, a display module and a mobile platform are arranged in the hardware system, and the mechanical structure provides a stable and flexible physical frame. The display module enables the robot to move around the child through visual feedback and the mobile platform, and personalized exercise services are provided. A hardware system is arranged, a personalized exercise scheme is provided, a software system is arranged, a child is helped to correct actions and improve the exercise quality, an auxiliary system is arranged, the child can be helped to keep correct postures and actions in the exercise process, and the exercise effect is improved; and people are helped to overcome various obstacles and the life quality is improved.

The present invention discloses an aircraft vibration simulation device and method, the device comprises: a working box, a first opening and at least one group of first material loading plates are arranged on the top of the working box, a cover is arranged at the first opening, and a rack is arranged on the top of the cover; a lifting plate, which moves up and down under the driving of power, and at least one group of second material loading plates are arranged on the top of the lifting plate; when the lifting plate is located in the working box, it is located below the first opening; a moving plate; a rotating plate, which is arranged on the working box; a plurality of pairs of rotating rods, each pair of rotating rods is arranged on the rotating plate and the moving plate respectively, each rotating rod on the moving plate can rotate, and each pair of rotating rods corresponds to a group of first material loading plates and a group of second material loading plates respectively; one end of each rotating rod is provided with a receiving groove; a screw rod; a nut, which is arranged on the screw rod, and one end of the moving plate is fixedly connected to the nut; a gear, which is fixed on one end of the screw rod and meshes with the rack. The device of the present invention has a simple structure, is simple to use, and can save costs.

This invention relates to the field of power distribution cabinet technology and provides an intelligent monitoring system and method for environmentally adaptive power distribution cabinets. The system includes: S1, integrating several environmental sensors within the cabinet to collect environmental data during a collection period; S2, pre-setting an environmental state recognition model to obtain an environmental state pattern; S3, using the environmental state pattern as a judgment condition and external environmental data as a constraint condition, inputting them into a pre-set environmental decision rule to obtain a set of decision actions; S4, prioritizing the decision actions within the decision action set to obtain the optimal set of decision actions; S5, executing the decision actions and recording the decision results; and S6, performing backtracking analysis on the historical database according to a backtracking period to optimize the decision threshold. This invention achieves adaptive adjustment of the power distribution cabinet to the environment through a pre-set environmental state recognition model and environmental decision rules, and realizes adaptive optimization of the decision threshold through backtracking analysis of the historical database during the backtracking period.

The invention belongs to the field of fluid machinery, and discloses a motor-driven two-dimensional digital valve, which comprises a valve body, a valve core, a transmission assembly, a stepping motor and a stepping motor mounting shell, the valve core is inserted into the valve body, the stepping motor is mounted in the stepping motor mounting shell, the stepping motor is connected with the transmission assembly, the transmission assembly is connected with the valve core, and the valve core is connected with the stepping motor mounting shell. The stepping motor drives the valve element to rotate in the valve body through the transmission assembly, so that the valve element and the valve body complete flow distribution work, the transmission assembly comprises a stepping motor switching block, a deflector rod and a first elastic piece, the stepping motor switching block is connected with an output shaft of the stepping motor, one end of the deflector rod is connected with the stepping motor switching block, and the other end of the deflector rod is connected with the valve element. The transmission assembly is designed to have a large transmission ratio, and through the arrangement of the large transmission ratio, the out-of-step possibility of the stepping motor in the operation process is remarkably reduced.

The invention discloses an aircraft vibration simulation device and method, and the device comprises a working box, the top of the working box is provided with a first opening and at least one group of first material carrying plates, the first opening is provided with a sealing cover, and the top of the sealing cover is provided with a rack; the lifting plate is driven by power to move up and down, and at least one group of second material carrying plates are arranged at the top of the lifting plate; when the lifting plate is located in the working box, the lifting plate is located below the first opening. A moving plate; the rotating plate is arranged on the working box; each pair of rotating rods is arranged on the rotating plate and the moving plate respectively, each rotating rod on the moving plate can rotate, and each pair of rotating rods corresponds to one group of first material carrying plates and one group of second material carrying plates respectively; a containing groove is formed in one end of each rotating rod; a screw rod; the nut is arranged on the lead screw, and one end of the movable plate is fixedly connected with the nut; and the gear is fixed at one end of the screw rod and is meshed with the rack. The device is simple in structure and easy to use, and the cost can be saved.

The utility model discloses an elevator front side car top guardrail, which belongs to the technical field of elevator car top guardrails, and comprises an elevator car and guardrail bodies, the top of the elevator car is fixedly connected with the guardrail bodies, one side of each guardrail body is open, the open end of one guardrail body is fixedly connected with a support bracket A, and the open end of the other guardrail body is fixedly connected with a support bracket B; the free end of the supporting bracket A is fixedly connected with a supporting seat, and the end face of the supporting seat is rotationally connected with a rotary guardrail through a rotary connecting piece. When maintenance personnel enter the car roof, the rotary guardrail is pushed to rotate towards the inner side of the car, the limiting switch is switched off, the elevator safety circuit is switched off, and the car cannot be started; after maintenance personnel enter the car roof, the rotary guardrail returns and rotates towards the outer side of the car under the torsion of the rotary connecting piece, after the rotary guardrail rotates to a designated position, the limiting switch is pressed on the surface of the limiting seat, the limiting switch is switched on, and the elevator safety circuit returns to normal.