23 results about "Nuclear environment" patented technology

The invention discloses a self-climbing module of a specialized robot. The self-climbing module comprises an irradiation-resistant shell, an adsorption device and a rope climbing device, a propeller device is mounted on the outer side wall of the radiation-resistant shell; the adsorption device comprises a gas control system and a suction cup assembly, the suction cup assembly is installed on the outer side wall, away from the propeller device, of the irradiation-resistant shell, the gas control system is installed in the irradiation-resistant shell, and the gas control system communicates with the suction cup assembly; the rope climbing device comprises a driving assembly, a positioning guide wheel set and a rope coiling winch. The driving assembly is installed in the irradiation-resistant shell, the rope coiling winch is installed at the output end of the driving assembly, and the positioning guide wheel set is rotationally connected into the irradiation-resistant shell. Wherein a traction rope is wound on the rope coiling winch and the positioning guide wheel group. The robot can realize high-precision climbing, positioning and hovering capabilities, can be stably adsorbed on the surface of a wall body in a high-radiation and high-risk environment, and provides efficient and reliable technical support for wall body repairing operation in a nuclear environment.

The invention discloses a Riemannian manifold-based path planning method in a radiation environment, and belongs to the technical field of robot path planning in a nuclear environment, and the method comprises the following steps: S1, modeling an environment in which a robot moves, and establishing a Riemannian manifold influenced by environmental factors; s2, performing path search on the Riemannian manifold through an RRT * algorithm to generate an initial optimal path; and S3, performing path smooth optimization on the initial optimal path through collision-free constraint and non-incremental radiation constraint to generate a final smooth path. By introducing Riemannian measurement, the influence of environmental factors such as radiation risk on path selection is reflected more truly, efficient and safe path planning of the robot in a complex nuclear environment is effectively achieved, and the problem that an existing method depends on Euclidean distance as heuristic measurement, and the path selection accuracy is poor is solved. And the influence of environmental factors such as radiation risk on path selection cannot be truly reflected, so that path generation is unsafe.

This invention relates to the field of unmanned aerial vehicle (UAV) interception technology, specifically to a UAV swarm for nuclear missile interception and its interception method, comprising: UAV modules, a communication module, and a coordination module; multiple UAV modules constitute a UAV swarm; the communication module is connected to each UAV module to achieve encrypted information transmission; the coordination module is constructed based on multi-agent reinforcement learning, and is connected to the UAV modules through the communication module, and is used to control the UAV swarm to cooperate in interception; this application achieves stable operation in a nuclear environment through the UAV modules, and constructs a protective shield to intercept nuclear missiles through the coordination module.

The application discloses a real-time path planning method fusing improved locust-dynamic window method, and comprises the following steps: S1, generating an initial path according to an improved A* algorithm, performing global path planning on the path in a radiation environment through an improved locust optimization algorithm, and determining the path from the starting point to the ending point; S2, performing local path planning according to the path through an improved DWA algorithm, and generating a planning path. Through the introduction of a position updating strategy considering radiation distribution information and an improved adaptive comfort zone coefficient, the influence of the radiation risk on path selection is more truly reflected, and the position updating process of the GOA is optimized. This enables the algorithm to effectively guide the locust population to avoid high radiation areas in a nuclear environment, and significantly reduces the radiation exposure risk. Through the combination of the global optimization capability of the improved A* algorithm, the initial population distribution of the locust optimization algorithm is improved, and then the convergence speed of the locust optimization algorithm is improved.

The nuclear radiation environment multi-target point inspection path planning mathematical modeling method, the grid map of the nuclear radiation environment is prior information, each grid in the grid map contains radiation field information and obstacle information;The method is as follows: considering the path length and the cumulative radiation dose and the turning energy consumption, the inspection path evaluation model and the pair path cost calculation model are established respectively.The present application is aimed at the mobile robot MTIPP problem in indoor nuclear environment, considering the path length and the cumulative radiation dose and the turning energy consumption, a double-layer mathematical model is established, the upper model (inspection path evaluation model) is used for quantitative evaluation of the pros and cons of the inspection target point traversal sequence, the lower model (pair path cost calculation model) puts forward the calculation method of the three dimension value of the pair path;Thus, the necessary prerequisite foundation is provided for the subsequent multi-target point inspection path planning.

A method for evaluating the performance changes of SmCo permanent magnet alloys under nuclear environmental conditions relates to a method for evaluating the performance of permanent magnet alloys. The present invention aims to solve the problem in the prior art that the performance changes of SmCo permanent magnet alloys cannot be evaluated due to the fact that the materials are affected by both the irradiation field and the temperature field under a nuclear environment. The sample of the present invention is placed in a cast copper heater, and the sample and the cast copper heater are placed in a vacuum chamber. The performance of the SmCo permanent magnet alloy is tested by implementing a working environment in which irradiation and temperature act together through a temperature measurement and control system. The accuracy of the service stability evaluation of SmCo alloy materials under a nuclear environment is improved. The present invention is used for the performance evaluation of permanent magnet alloys.

The invention discloses a real-time path planning method fusing an improved locust-dynamic window method, and the method comprises the following steps: S1, generating an initial path according to an improved A * algorithm, carrying out the global path planning of a path in a radiation environment through introducing an improved locust optimization algorithm, and determining a path from a starting point to an end point; and S2, performing local path planning according to the path through an improved DWA algorithm, and generating a planned path. By introducing a position updating strategy considering radiation distribution information and an improved adaptive comfort zone coefficient, the influence of radiation risk on path selection is reflected more truly, and the GOA position updating process is optimized. The algorithm can effectively guide the locust population to avoid a high-radiation area in a nuclear environment, and the radiation exposure risk is remarkably reduced. The initial population distribution of the locust optimization algorithm is improved by combining and improving the global optimization capability of the A * algorithm, so that the convergence speed of the locust optimization algorithm is improved.

The application discloses a method for calculating the upper limit of impurity content of nuclear materials of a fusion device, and is used for analyzing the impurity control requirement of materials serving in the nuclear environment of the fusion device. The method is characterized in that: under the service environment conditions and examination requirements of the specified nuclear materials, the main components and the possible impurity elements contained in the materials are simulated, and the control requirement of the impurity elements is determined according to the nuclear response calculation of various normalization indexes. The method can realize the rapid calculation of the upper limit of impurity content of the nuclear materials of the fusion device under the service conditions, and can be applied to the design analysis of the nuclear materials of the fusion device and the fusion device.

The application provides a high-precision cross-space conveying mechanism for components in a radiation environment, which is composed of a clamp driving mechanism (1), a rigid chain mechanism (2), a clamp mechanism (3) and a base material tank (4). The upper left end of the rigid chain mechanism (2) is connected with the clamp driving mechanism (1), and the lower right end of the rigid chain mechanism (2) is connected with the base material tank (4). The clamp driving mechanism (1) is connected with the clamp mechanism (3). The servo motor directly drives the chain wheel chain through the shaft coupling in the application, and the whole is gapless driving. At the same time, the whole chain almost has no random error, and the purpose of high-precision feeding is achieved. The clamp driving mechanism of the application leads the power of the clamping mechanism to the non-moving part through the radiation-resistant brake line, which is very convenient for use and maintenance in the nuclear environment. The guiding rigid chain and the clamping base slide on the T-shaped guide rail, and the horizontal cross-space component conveying can still be carried out under the intermittent working condition of the material tank.

The present invention relates to a process of making a corrosion resistant, aluminium-deposited nickel-based superalloy super alloy for fission microstructures. The alloy comprises a nickel-based substrate (10) containing nickel, chromium, molybdenum, and titanium, with an aluminium layer (20) deposited on the substrate using vacuum plasma deposition. The substrate contains 80-88% nickel, 4-7% chromium, 6-9% molybdenum, and 1-3% titanium by weight. The aluminium layer have a thickness between 50-200µm, and acts as a barrier against fluoride salt attacks, reducing degradation rates and ensuring better structural integrity of the fission microstructure. The aluminium-deposited nickel-based superalloy can be used in various components of fission microstructures, including fuel cladding, heat exchangers, and reactor vessels, to improve the efficiency, longevity, and safety in nuclear environments.

The invention belongs to the technical field of human factor engineering verification, and discloses a nuclear power plant human factor engineering verification and training method and system based on virtual reality, and the method comprises the steps: constructing a virtual reality intelligent interaction scene; synchronously collecting multi-dimensional data of the student in the virtual reality intelligent interaction scene, wherein the multi-dimensional data comprises electroencephalogram data, physiological data, operation data and eye movement data; performing data preprocessing and feature extraction on the multi-dimensional data to obtain a plurality of key features, and performing fusion analysis on the plurality of key features; and performing multi-dimensional evaluation and personalized feedback based on the fusion analysis result, generating a multi-dimensional evaluation report, and performing personalized training of the trainee according to the personalized feedback. According to the invention, by constructing a high-simulation virtual nuclear environment and synchronously collecting multi-modal data of an operator, scientific verification of a human-computer interface, environment design and operation regulations is realized, and personalized training of students is realized.

The invention discloses a nuclear security inspection method and system based on unmanned aerial vehicles, and relates to the field of radiation environment monitoring, and the method comprises the following steps: an unmanned aerial vehicle formation inspects according to a planned flight path; acquiring gamma dose rate and position data, uploading the data to an upper computer for preprocessing, generating a three-dimensional point cloud picture, and performing visual analysis; identifying gamma dose rate hot spots by using a three-dimensional radiation abnormal hot spot search algorithm, performing preliminary positioning in a three-dimensional space, and marking coordinates and gamma dose rate values of the gamma dose rate hot spots; sending the preliminarily determined position of the radioactive source to the unmanned aerial vehicle, scanning by the unmanned aerial vehicle to obtain an accurate value, transmitting the accurate value to the upper computer, and obtaining an accurate position by using a nonlinear least square method; the unmanned aerial vehicle receives the position information, locks a suspicious target carrying a radioactive source through an airborne target re-identification system, and gives an alarm; uploading the gamma dose rate information, the position information and the target information to a visual terminal interface to form track information; and repeating the steps, and locking the radiation anomaly region and the suspicious target. According to the invention, efficient and accurate technical support is provided for nuclear environment safety.

This invention belongs to the field of mechanical automation engineering, specifically a multifunctional integrated detection and decontamination device. A lifting assembly is mounted on the guide column, and a rotary table assembly has a power unit and a rotating unit. The power unit is connected to the output end of the lifting assembly, and the rotating unit is driven to rotate by the power unit. The entire rotary table assembly is lifted and lowered along the length of the guide column by the lifting assembly. A partial decontamination module and a comprehensive decontamination module are respectively connected to the rotating unit of the rotary table assembly. One end of the partial decontamination module is connected to the rotating unit of the rotary table assembly, and the other end is the execution unit that enables integrated detection and decontamination. The comprehensive decontamination module is a deformable spray pipe arm that sprays washing liquid onto contaminated personnel. This invention can detect and decontaminate radioactive material contamination on the body surface of personnel working in nuclear environments, effectively reducing the radiation dose to contaminated personnel and minimizing the spread of contamination. It features multiple functions, high efficiency, and wide applicability.

The invention discloses a nuclear environment monitoring system and method combining a visual field and a radiation field, and relates to the technical field of nuclear radiation monitoring. The nuclear environment monitoring system combining the visual field and the radiation field comprises a camera, an FPGA (Field Programmable Gate Array) module and an upper computer, the camera comprises a CMOS sensor; the FPGA module comprises a noise suppression sub-module and a wavelet transform sub-module; the noise suppression sub-module is used for carrying out three-channel independent parallel noise suppression on the image and outputting a noise suppression image; and the wavelet transform sub-module is used for performing Haar wavelet decomposition on the image and solving to obtain a radiation dose rate. A nuclear environment monitoring method combining a visual field and a radiation field is applied to a nuclear environment monitoring system combining the visual field and the radiation field. According to the invention, nuclear environment monitoring combining the visual field and the radiation field is realized, the field picture and the radiation dose rate can be displayed on the same screen of the upper computer, and the quick response requirement of a nuclear leakage emergency scene can be met.

The present invention discloses a nuclear security inspection method and system based on drones, which relates to the field of radiation environment monitoring. The method includes the following steps: a drone formation conducts an inspection along a planned flight path; gamma dose rate and position data are collected and uploaded to a host computer for pre-processing, generating a three-dimensional point cloud map and performing visual analysis; a three-dimensional radiation anomaly hotspot search algorithm is used to identify gamma dose rate hotspots, perform preliminary positioning in three-dimensional space, and mark their coordinates and gamma dose rate values; the location of the preliminary determined radioactive source is sent to the drone, which scans and transmits the precise value to the host computer, where the precise location is determined using a nonlinear least squares method; the drone receives the position information, uses an onboard target re-identification system to locate a suspected target carrying a radioactive source, and issues a warning; the gamma dose rate information, position information, and target information are uploaded to a visual terminal interface to form trajectory information; and the above steps are repeated to locate radiation anomaly areas and suspicious targets. This invention provides efficient and accurate technical support for nuclear environmental safety.

The invention discloses a nuclear environment robot monocular vision inertial navigation positioning method based on edge features, and belongs to the technical field of nuclear environment robot navigation. The method comprises the following steps: acquiring a camera image and measurement data of an inertial measurement unit; preprocessing the camera image and the measurement data to obtain an edge point feature of the camera image, a Shii-Tomasi point feature and a pre-integration result of the measurement data; performing data association on the edge point features and the Shii-Tomasi point features to obtain interior point features; and obtaining a pose state quantity of the nuclear environment robot by adopting a sliding window nonlinear optimization inner point feature and a pre-integration result. According to the method, higher-quality visual point features can be extracted from the radiation scene image, and the influence of radiation noise on visual feature extraction and tracking is efficiently suppressed, so that the positioning performance of a visual inertial navigation positioning algorithm in a high-dose-rate nuclear radiation environment is improved.

The invention discloses a preparation method of a temperature measuring probe of a thermal noise temperature sensor for nuclear engineering, and the temperature measuring probe comprises a measuring resistor, a metal shell, a lead and an insulating layer porcelain column provided with four axial through holes through material preparation, armored body assembly, armored body drawing, measuring end welding and reference end ceramic sealing. The measuring resistor is made of a SiC / C composite ceramic material, the metal shell is made of a tungsten-rhenium alloy pipe, the lead comprises four tungsten-rhenium alloy wires, and the insulating layer knob insulator is made of beryllium oxide (BeO) or boron nitride (BN). The temperature measuring probe can work for a long time at a temperature and is suitable for a high-temperature nuclear environment of 1500-2000 DEG C; the reference end is sealed through ceramic metallization, so that the high-insulation requirement of the temperature measuring probe is met, and the use in an ultrahigh-temperature and strong-irradiation environment is met; temperature calibration is not needed, the problem of temperature drift is solved, and the temperature measurement precision of the temperature measurement probe reaches + / -0.1% t to 0.5% t.

The utility model discloses a nuclear environment underwater split body lamp belongs to underwater split body lamp technical field, solve the problem that underwater split body lamp due to setting in underwater environment application, it needs long time work to irradiate, also lead to it can produce more heat, and because it needs to adjust angle, if need frequent regulation, then motor also can produce more heat, and this heat accumulation does not discharge can lead to the lamp appears the breakage condition problem. Including lower lamp holder. The utility model application time, the heat of heat dissipation axle guide lower lamp holder diffuses outward, and heat dissipation arc part and heat dissipation grid piece auxiliary heat dissipation. When temperature sensor detects temperature reaches threshold value, trigger circuit makes triode conduction, and traction electromagnet energization pulls the plugging block, lets water enter heat dissipation upper rotary pipe and heat dissipation connection shell and carries out heat exchange, avoids the damage of lamp body. When temperature is lower than threshold value, traction electromagnet is powered off, and the plugging block reseals the intercommunication, keeps the leakproofness.

The invention relates to the technical field of robot navigation, and discloses an obstacle avoidance route trajectory planning system and method for a nuclear facility decommissioning robot, and the system comprises a mobile platform, a sensor group, and a calculation platform. The multi-source sensing fusion module executes data space-time registration; the multi-physics field coupling modeling module constructs a structural obstacle, a radiation dose and a communication connection potential field, and calculates a virtual resultant force vector representing an optimal trend; the anisotropic virtual kinetic parameter generation module constructs a follow-up local coordinate system, sets virtual mass and damping in the resultant force direction to be smaller than transverse numerical values, and generates differential parameters; and the nonlinear model prediction control module introduces the vectors and the parameters into a prediction model, and solves a constraint optimization problem to generate an optimal instruction. According to the method, multi-dimensional constraint collaborative avoidance is realized, the robot is endowed with the motion characteristics of agility and transverse stability, and the safety and reliability of nuclear environment operation are improved.

The utility model relates to a high-place operation hanging basket used for nuclear power shielding plant upper portion ring corridor operation and air deflector installation and maintenance environment, belongs to the technical field of lifting and hoisting, and particularly relates to lifting and hoisting of nuclear power equipment. The hanging basket electric vehicle, the connecting rod and the hanging basket track are arranged to form a hanging mechanism, the structure of the hanging basket can be conveniently moved in a narrow space, the risk of re-disassembly and re-assembly is avoided, the mounting frame, the hanging basket and the auxiliary basket are arranged to form a hanging platform capable of adapting to equipment such as a nuclear power reactor, a large tank body and a chimney, and the hanging platform is convenient to use. Therefore, the high-place operation hanging basket special for the nuclear power environment is constructed, the auxiliary basket can also allow a cable to penetrate through and provide lateral protection, the space in the hanging basket can be saved, the cable can be prevented from being damaged, the construction efficiency is greatly improved, and the construction difficulty is reduced.

The invention discloses a method for connecting silicon carbide ceramics through spark plasma sintering assisted by a titanium foil interlayer, and belongs to the technical field of ceramic connection. In order to optimize the performance of a silicon carbide ceramic material in a nuclear environment, by adopting a spark plasma sintering (SPS, also known as a current field assisted sintering technology) ceramic connection technology, metal titanium is selected as a silicon carbide connection middle layer, and meanwhile, proper connection temperature, heat preservation time and connection layer thickness are selected, so that the silicon carbide ceramic material which is high in connection strength and good in heat preservation performance is obtained. According to the connection structure, the reliability of the silicon carbide ceramic material serving as a fuel cladding material of a light water reactor (LWR) in the nuclear power field is improved.

The invention provides a nuclear power gear transmission device fault diagnosis method based on multi-modal deep learning, and belongs to the technical field of gear fault diagnosis based on deep learning. Firstly, structural vibration, acoustics and operation condition parameters are collected through a sensor; secondly, constructing a graph neural network for dynamically coupling equipment physical topology and nuclear environment influence to perceive propagation characteristics of a fault in a spatial dimension, and capturing a slow evolution rule of the fault in a time dimension in combination with a time Transform network; then, a collaborative attention fusion mechanism is designed, deep dialogue and cross validation of microscopic vibration signals and macroscopic working condition background information are achieved, and interference caused by environment and working condition changes is removed; and finally, through the trained fault prediction learning model, a clear fault type and a confidence score are output. According to the invention, high-precision intelligent diagnosis of internal early weak faults of the nuclear safety level key gear transmission device in an extreme environment is realized.