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6824 results about "Relative motion" patented technology

Trinocular Vision Systems For Unmanned Aerial Vehicles

ActiveUS20250026506A1Uncrewed vehicleRelative motion
An unmanned aerial vehicle (UAV) that includes: a chassis; a plurality of arms that extend outwardly from the chassis; a plurality of propeller assemblies that are supported by the plurality of arms; a canopy that is connected to the chassis so as to provide an outer cover for the UAV that is configured to protect internal components thereof; a frame that is supported by the canopy such that the frame is isolated from the chassis; and a plurality of image capture assemblies that are supported by the frame such that the frame separates the plurality of image capture assemblies from the chassis and the canopy so as to inhibit relative movement between the plurality of image capture assemblies during operation of the UAV.
Owner:SKYDIO INC

Ultra-wideband laser radar inertial navigation cooperative SLAM (Simultaneous Localization and Mapping) method and system

The invention discloses an ultra-wideband laser radar inertial navigation cooperative SLAM (Simultaneous Localization and Mapping) method and system, which are suitable for robot positioning and mapping tasks in a GPS (Global Positioning System)-free environment. According to the method, high-frequency motion priori of an IMU, relative pose constraint of LiDAR and absolute ranging information of UWB are fused, a unified factor graph optimization model is constructed, and multi-sensor cooperative positioning is realized; in the system initialization stage, IMU bias calibration, UWB base station coordinate configuration and LiDAR initial attitude estimation are completed; in the operation process, IMU pre-integration is utilized to predict the pose, LiDAR point cloud registration is utilized to obtain the relative motion between key frames, UWB ranging is combined to construct a residual item, a self-adaptive weight mechanism is introduced to suppress ranging abnormity, and the fusion robustness is improved; the system supports geometric feature loopback detection, cross-frame constraints are constructed in combination with UWB to carry out closed-loop optimization, and an optimization result is used for real-time incremental updating of a global map; the method has the advantages of high positioning precision, strong anti-interference capability, wide application scene and the like.
Owner:XIAN TECH UNIV

Reclining seating unit for use in theater with riser arrangement

A seating unit includes: a frame having a pair of arms, wherein each of the arms includes a cutaway portion in a lower rear area thereof, the cutaway portion configured to receive a tread and a riser of a riser arrangement; a backrest; a seat; a first footrest; a reclining mechanism; and a linear actuator. The reclining mechanism is connected between the backrest, seat, and first footrest, the reclining mechanism comprising a series of pivotally interconnected links and configured to move the seating unit between: (a) an upright position, in which the backrest is disposed at a first generally upright backrest angle relative to the seat, the seat is disposed at a first generally horizontal seat angle and at a first longitudinal position, and the first footrest is retracted below a forward portion of the seat; and (b) a fully reclined position, in which the backrest is disposed at a second backrest angle relative to horizontal that is shallower than the first backrest angle, the first footrest is extended in front of the seat, the seat has a second seat angle that is deeper relative to horizontal than the first seat angle, and the seat has a second longitudinal position that is rearward of the first longitudinal position. The reclining mechanism includes a footrest mechanism attached to the first footrest, the footrest mechanism configured to control relative movement of the first footrest relative to the seat. The linear actuator is attached to the reclining mechanism and the footrest linkage and configured to move the backrest, seat and first footrest between the upright and fully reclined positions. The linear actuator and the footrest linkage reside entirely below a front portion of the seat and in front of the cutaway portion of the arms.
Owner:ULTRA MEK INC

Unmanned aerial vehicle flight path positioning method and system based on multi-source information fusion

The invention relates to the technical field of unmanned aerial vehicle positioning, in particular to an unmanned aerial vehicle flight path positioning method and system based on multi-source information fusion. The method comprises the following steps: acquiring an original observation data stream of an unmanned aerial vehicle in real time through a sensor array, and preprocessing to output a multi-source data sample set; calculating relative motion increment between adjacent key frames through an IMU pre-integration model, and extracting local pose estimation through a visual geometric calculation method; evaluating the confidence of each sensor in real time to dynamically generate an adaptive weight coefficient; and constructing a tight coupling fusion filter taking position, speed and attitude errors as core state quantities, and outputting a global optimal trajectory of the unmanned aerial vehicle. According to the invention, the weight is dynamically distributed through the real-time confidence of the sensor, the multi-source data association is fully mined, and the flight path positioning precision and environmental adaptability of the unmanned aerial vehicle are improved.
Owner:YANTAI XINFEI INTELLIGENT SYST CO LTD

Autonomous navigation method for lunar satellite formation and second-order filtering navigation architecture

The invention relates to an autonomous navigation method for lunar satellite formation and a second-order filtering navigation architecture, and the autonomous navigation method comprises the steps: obtaining orbit prediction information based on a kinetic model of the lunar satellite formation, and obtaining collaborative theory observation information based on a collaborative observation model, carrying out fusion processing on orbit prediction information, collaborative theory observation information and multi-source observation data of in-orbit observation by using an extended Kalman filtering algorithm, and estimating an absolute orbit state of the lunar satellite formation; establishing a relative motion model of the slave satellite under the local coordinate system of the master satellite, and establishing a relative measurement model; and taking the absolute orbit state of the master satellite as a reference datum, obtaining a preliminary prediction relative orbit state based on the relative motion model of the slave satellite, and obtaining relative measurement data including distance measurement and angle measurement based on the relative measurement model, and fusing the relative measurement data and the preliminarily predicted relative orbit state through an extended Kalman filtering algorithm to estimate the relative orbit state of the slave satellite. Navigation may be independent of ground support.
Owner:INNOVATION ACAD FOR MICROSATELLITES OF CAS +1

Interactive motion planning for autonomous systems and applications

ActiveUS20250058802A1MachineRelative motion
In various examples, a gradient-based motion planner evaluates a cost function corresponding to routes for a machine and an obstacle to jointly update the routes. The cost function may include terms to penalize deviation from an initial route predicted for the obstacle and acceleration or jerk for the obstacle. The routes for the machine and the obstacle that are updated may be selected using motion classes that characterize relative motion between a route for the machine and a route for the obstacle. A motion class may be based at least on an angular distance between the machine and the agent and free-end homotopy, where members of the class execute the same relative motion with respect to other agents while being continuously transformable to any other member of the class. The members of the class may have the same start point and different end points.
Owner:NVIDIA CORP

Columnar transparent part defect detection method

The invention discloses a columnar transparent part defect detection method, and relates to the technical field of optical detection and machine vision, and the detection method comprises a detection preparation stage, a detection pose configuration stage, a structured light stripe excitation stage, a machine vision detection stage, a model optimization evaluation stage, and a detection post-processing stage. According to the defect detection method for the columnar transparent part, the comprehensive performance of defect detection of the columnar transparent part is remarkably improved through the synergistic effect of coaxial pose optimization, composite structure light source design and improved YOLOv8 deep learning model; various common surface and subsurface defects in production are covered; the real-time detection requirement of an industrial production line is met through relative movement of the part and the light source and high-speed image acquisition and processing; the system has strong anti-interference capability, and can adapt to detection scenes of different materials, sizes and environmental conditions.
Owner:TIANJIN UNIV

Multi-unmanned vehicle cooperative positioning method based on graph optimization UWB / IMU / GNSS

The invention discloses a graph optimization-based UWB / IMU / GNSS multi-unmanned vehicle cooperative positioning method, which comprises a global satellite navigation system GNSS, an ultra wide band (UWB) system, an inertial measurement unit IMU and a robot motion control system, and is characterized in that the UWB system comprises a UWB label and three UWB base stations, the UWB label is deployed on a target unmanned vehicle to be positioned, and the UWB label is deployed on the target unmanned vehicle to be positioned; and the three UWB base stations are respectively arranged on the other three unmanned vehicles as mobile base station unmanned vehicles. The GNSS module and the IMU module are deployed on the unmanned vehicle to serve as a movable UWB base station, and GNSS absolute position information and IMU relative motion information are fused by adopting an extended Kalman filtering algorithm; and according to the determined position of the unmanned vehicle in the movable base station, a distance observation value between the label and the base station is obtained based on a single-side bidirectional distance measurement method, a factor graph model fusing UWB distance measurement constraint and IMU motion constraint is constructed, and a factor graph optimization algorithm is adopted to optimize the position of the target unmanned vehicle. According to the method, the cost of a traditional fixed base station is reduced through the deployment of a mobile base station unmanned vehicle, and the precision and robustness of UWB system positioning in a complex environment are improved in combination with a multi-source sensor data fusion strategy.
Owner:DALIAN MARITIME UNIVERSITY

Screen display glass film tearing equipment

The screen display glass film tearing equipment comprises a screen display glass loading unit, a film tearing unit and an adhesive supply unit, the screen display glass loading unit comprises a carrying table and a moving mechanism, the carrying table is used for positioning screen display glass downwards from a to-be-torn film, the film tearing unit is located below the to-be-torn film and comprises a film tearing head and a power device, and the film tearing head comprises a film tearing seat, a clamping jaw and a roller; the power device comprises a first power piece and a second power piece. On one hand, on the basis of movement cooperation of the clamping jaw and the rolling wheel, aligned gradual stripping of the rolling position and the stripping position of the to-be-torn film is kept, and on the other hand, the overturning angle is increased based on follow-up overturning of the extending section, so that the success rate of forming the stripping angle by inward overturning of the to-be-torn film is greatly increased; the probability that the glue is separated from the to-be-torn film or the corner of the to-be-torn film is torn is effectively reduced; on the other hand, diagonal film tearing is formed based on the relative movement of the screen display glass and the clamping jaw, the risk that the protective film is torn or falls off is reduced, and the whole film is torn off more efficiently in a more labor-saving mode.
Owner:SUZHOU GUANGSAO OPTOELECTRONICS TECH CO LTD

Table assembly for press brake system

ActiveUS12220739B2Work benchesClampsBending (metalworking)Control engineering
A table assembly is used to support a workpiece to facilitate bending of the workpiece. The table assembly is attached to a press brake system and include a base and a clamp. The clamp is movable relative to the base to enable placement of the workpiece onto the base, and the clamp secures the workpiece to the base to block relative movement between the workpiece and the press brake system without additional user operations. The workpiece is secured via the table assembly without a manual force (e.g., to hold the workpiece in place) while the press brake system operates to bend the workpiece. The table assembly reduces, limits, or eliminates certain user operations during metalworking. The table assembly improves user experience (e.g., reduce an amount of manual labor) and / or efficiency associated with press brake operations.
Owner:SCHWEITZER ENGINEERING LABORATORIES INC

Protective film stripping process for screen display glass based on angle lifting and rolling cooperation

ActiveCN121990254Areduce the chance of tearingbig angleArticle unpackingStructural engineeringRelative motion
The invention relates to a protective film uncovering process based on corner lifting and rolling cooperation type screen display glass. The protective film uncovering process comprises the following steps: S1, corner lifting; s2, tearing off; and S3, collecting the film. On one hand, through cooperation of the film tearing clamping jaw and the rolling wheel, step-by-step peeling with the rolling position and the peeling position aligned is kept, meanwhile, the angle between the connecting section and the screen display glass is gradually increased on the basis that the connecting section is turned inwards under the condition that the adhesion section is not stressed, the success rate of forming an inwards-turned peeling angle is greatly increased, and the production efficiency is improved. The probability that the film-tearing adhesive tape is separated from the protective film or the corner of the protective film is torn is reduced; on the other hand, the complete tearing rate of the protective film is increased based on the relative movement of the glass and the film tearing clamping jaw, the tearing risk of the protective film is reduced, more labor-saving and faster diagonal tearing is achieved, meanwhile, based on pulling formed by the film collecting clamping jaw and the film tearing clamping jaw and airflow blowing cooperation formed by the film collecting clamping jaw and the film tearing clamping jaw, the completeness of film collecting is improved, and the production efficiency is improved. And the problem that the film tearing adhesive tape is adhered to the film tearing clamping jaw is solved, so that the continuity of peeling off the protective film is improved.
Owner:SUZHOU GUANGSAO OPTOELECTRONICS TECH CO LTD

Satellite formation autonomous control method based on relative motion fitting

The invention discloses a satellite formation autonomous control method based on relative motion fitting, belongs to the technical field of spacecraft control, and aims to solve the problem that a traditional formation control method cannot meet formation control requirements in an environment with navigation signal deficiency. The method comprises the following steps: step 1, when a main satellite passes through an ascending node, performing relative motion fitting by utilizing inter-satellite spacing and direction of a plurality of discretely distributed sub-satellites relative to the main satellite observed in a previous orbital period so as to obtain coefficients of relative motion functions of the sub-satellites; step 2, obtaining orbit parameter deviation of the child satellites relative to the primary satellite according to the coefficient of the relative motion function of the child satellites; step 3, acquiring a control vector and a control duration required by the formation adjustment of the child satellites according to the orbit parameter deviation; and step 4, each sub-satellite performs autonomous control according to the control vector and the control duration obtained in the step 3. The method is used for satellite formation autonomous control.
Owner:HARBIN INST OF TECH

Dynamic analysis optimization method for high-speed stamping hybrid mechanism with lubricating gap considering impact load

The invention relates to a dynamic analysis optimization method for a high-speed stamping hybrid mechanism with a lubricating gap and considering an impact load. The dynamic analysis optimization method comprises the following steps: S1, defining structural parameters and design parameters; s2, establishing a lubrication gap motion model, a contact force model and an oil film bearing force model; s3, introducing a flexible beam unit model; s4, the relative motion state of the bearing and the shaft at the revolute pair element is judged; s5, establishing a kinetic equation; s6, solving the kinetic equation; s7, optimizing and improving the structural parameters of the mechanism; and S8, circulating the above process, and carrying out iterative solution until the kinetic analysis and parameter optimization are completed. The established rigid-flexible coupling kinetic equation containing the lubricating gap can more accurately predict the mechanism dynamic response characteristics of the high-speed stamping hybrid mechanism when the high-speed stamping hybrid mechanism is subjected to the impact load in actual work and operation, and the modeling method is suitable for dynamic response characteristic analysis and optimization design of high-speed stamping mechanisms of other configurations. The method has the advantages of wide applicability and the like.
Owner:SHANDONG UNIV OF SCI & TECH

Magnesium chip crushing device

The invention relates to the technical field of crushing devices, and particularly discloses a magnesium chip crushing device which comprises a base, a ball-milling barrel is rotatably mounted on the base, an air blowing pipe is mounted in the ball-milling barrel in the axial direction of the ball-milling barrel and can rotate around the axis of the ball-milling barrel, and air blowing holes are formed in the air blowing pipe and can convey cooling gas into the ball-milling barrel. A support is fixedly installed on the air blowing pipe, a separating plate and a collecting cover are fixedly installed on the support, the support is communicated with the outside of the ball milling cylinder, and the air blowing pipe has two relative movement positions. The device has the beneficial effects that the separating plate can separate generated micro-powder from materials, the micro-powder is driven by cooling gas to enter the collecting cover and then is discharged, meanwhile, in the falling process of the materials, convection can be formed between the materials and the rising cooling gas, heat in the materials is taken away, the micro-powder generated in the working process can be discharged, meanwhile, the materials can be cooled, and the working efficiency is improved. And the explosion risk is effectively reduced.
Owner:SHANXI FUHENGDI NEW MATERIALS CO LTD

Screen display glass double-sided film tearing equipment

The double-sided film tearing equipment for the screen display glass comprises a lower film tearing system and an upper film tearing system. On one hand, on the basis of multi-motion cooperation of the clamping jaw and the roller, the corner of the to-be-torn film is gradually torn off by keeping the rolling position and the stripping position aligned under blowing of airflow, the probability that the adhesive tape is separated from the to-be-torn film or the corner of the to-be-torn film is torn off is greatly reduced, and the success rate that the to-be-torn film forms the tearing angle is effectively increased; meanwhile, diagonal film tearing is formed based on relative movement of the glass and the clamping jaws, the risk that the protective film is torn or falls off is reduced, and more labor-saving and efficient film tearing is achieved; on the other hand, a torn film is clamped based on a film stripping chuck and cooperates with airflow blowing to separate an adhesive self-clamping jaw so as to improve the film stripping success rate, and in combination with butt joint of upper and lower film stripping system self-carrying tables which are reversely arranged, the direction of the film to be torn is switched in a turnover-free manner, so that the glass pollution or collision risk is remarkably reduced, the product yield is improved, and the production cost is reduced. Moreover, stable and continuous implementation of double-sided film tearing of multiple pieces of glass is ensured, and the film tearing efficiency is greatly improved.
Owner:SUZHOU GUANGSAO OPTOELECTRONICS TECH CO LTD

Intelligent trajectory planning and cooperative control method for aircraft

The invention discloses an aircraft intelligent trajectory planning and cooperative control method based on offline optimization-intelligent learning-online guidance, and the method comprises the steps: firstly building an aircraft motion model and an aircraft-target relative motion model, and constructing a full-airspace and full-feature-point optimal trajectory data set; secondly, parameterized representation is carried out on the three-dimensional optimal trajectory, and a proportional guidance coefficient data set is constructed; then neural network training fitting is carried out on the proportional guidance coefficient data set, and a multi-constraint guidance method based on a neural network is designed; and finally, designing a three-dimensional collaborative guidance law by combining a multi-constraint guidance method and a residual time accurate estimation technology. According to the invention, the problems of insufficient real-time performance, incapability of meeting index optimality, incapability of coping with multiple constraints, difficulty in realizing multiple flight modes and the like of the existing trajectory planning and collaborative guidance technology are solved; the multi-constraint and optimality of the trajectory are realized through offline optimization, the global adaptability and small calculation amount of the trajectory are realized through intelligent learning, and a multi-cooperative flight mode is realized through online cooperative guidance.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Service spacecraft multi-orbit maneuvering strategy approaching observation method based on J2 perturbation compensation

The invention discloses a service spacecraft multi-orbit maneuvering strategy approaching observation method based on J2 perturbation compensation, solves the problem of how to quickly improve orbit maneuvering accuracy, and belongs to the field of service spacecraft multi-orbit maneuvering strategy approaching observation. Comprising the following steps: constructing a motion equation under J2 item perturbation compensation under a target orbit coordinate system; constructing a service spacecraft multi-orbit maneuvering strategy model through the relative motion propagation relational expression and the motion equation; inputting the termination moment position conforming to the termination moment distance constraint into the model to output a single speed increment, and reserving the single speed increment conforming to the termination moment illumination angle constraint and the single speed increment constraint at the same time to obtain a speed increment solution set; constructing a circular region which takes the space target as a center and has a radius meeting a termination moment distance constraint; when the service spacecraft arrives at the circular area at a specified moment, marking the task successfully, and obtaining a service spacecraft multi-orbit maneuvering strategy for approaching observation; according to the invention, accurate and rapid track maneuvering is realized.
Owner:PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV

Chain type scraper conveyor

The invention relates to the technical field of conveying equipment, in particular to a chain type scraper conveyor which comprises a rack, a chain, a scraping mechanism, a conveying belt and a synchronizing mechanism. Through cooperation of the sliding blocks and the sliding grooves at the two ends of the scraping plate, the scraping plate is perpendicular to the chain all the time, and the problem that in the prior art, due to the fact that the chain of a scraper conveyor is stressed, the scraping plate deviates, and abrasion is generated between the scraping plate and a shell is solved; in addition, relative movement between the bearing table and the scraping plate is changed into synchronous movement between the bearing table and the scraping plate, and abrasion caused by friction between the scraping plate and the bearing table is avoided. By arranging the synchronizing mechanism, the conveyor can adjust the relative motion relation between the scraping plate and the conveying belt according to different working conditions, and when materials are heavy, the scraping plate moves relative to the conveying belt to push the materials on the conveying belt; when the materials are light, the conveying belt and the scraping plate move synchronously, abrasion between the conveying belt and the scraping plate and bending abrasion of the conveying belt are reduced, and the service life is further prolonged.
Owner:QINGDAO ZHENGDAZHENG ELECTRIC POWER ENVIRONMENTAL PROTECTION

Deep ploughing and soil crushing equipment for agricultural soil

The invention discloses deep ploughing and soil crushing equipment for agricultural soil, and relates to the technical field of deep ploughing and soil crushing equipment. Comprising a cylinder, the cylinder is rotationally connected with a connecting assembly, an arc plate is fixedly connected to the outer side of the cylinder, a circular groove is formed in the outer side of the arc plate, a conical block is fixedly connected to the bottom of the arc plate, a fixing strip is fixedly connected to the inner wall of the cylinder, a circular rod is fixedly connected to the bottom of the conical block, and a sleeve is slidably connected to the outer side of the circular rod; the bottom of the round rod is fixedly connected with a reset spring, and the end, away from the round rod, of the reset spring is fixedly connected with a scraper. According to the deep ploughing and soil crushing equipment for agricultural soil, soil is dug up through an outer side arc plate and conveyed to the position near an inner fixing cylinder, the inner fixing cylinder rotates in the opposite direction, relative movement is formed between the inner fixing cylinder and the inner fixing cylinder, the shearing and kneading effects are generated, and then connection between soil particles is further damaged through crushing blocks on the outer side of the fixing cylinder; and therefore, the soil is crushed more finely.
Owner:NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S

Three-dimensional human body posture estimation method and system

The invention discloses a three-dimensional human body posture estimation method and system, and relates to the technical field of computer vision, and the method comprises the steps: extracting two-dimensional human body posture key points from a monocular video picture sequence, and generating a two-dimensional human body posture key point sequence; projecting the two-dimensional key point sequence to a feature space through nonlinear high-dimensional mapping to generate a high-dimensional feature space matrix; and inputting the high-dimensional feature matrix into a three-dimensional human body posture recognition model fusing motion constraints and frequency division spatial-temporal features to obtain a three-dimensional human body posture key point sequence, and realizing three-dimensional human body posture estimation through three-dimensional coordinates. According to the method, the robustness and the detection precision of the monocular three-dimensional human body posture estimation method are improved. Error values of relative movement speed, skeleton length and skeleton direction of the key points are calculated, so that training is easier to converge, and the training process is more stable.
Owner:TONGJI UNIV

Headrest mechanism capable of being adjusted in two directions

The utility model relates to a two-way adjusting headrest mechanism which comprises a moving part, a fixed base and a sliding block, the fixed base is fixedly installed on a seat backrest and provided with a guide rail, the moving part is provided with a guide groove, the guide rail is installed in the guide groove so that the moving part can move on the fixed base, the fixed base is further provided with a long groove, and the long groove is communicated with the sliding block. The sliding block is located on the side, away from the moving part, of the fixed base and fixedly connected with the moving part in the mode of penetrating through the long groove. According to the two-way adjusting headrest mechanism, the moving part is connected with the fixed base through the sliding block, the function of reinforcing and supplementing rigidity is achieved, the size of the shielding part is increased by reducing the matching size of the relative moving part on the basis of guaranteeing the stroke, and even if the shape of a seat backrest is not high enough, the shielding part can be still still still. When the headrest is moved to the highest position, the headrest rear structure can still be shielded by the seat backrest, a better appearance effect is obtained, and the suspension type modeling headrest is suitable for suspension type modeling headrests and is simple in structure and low in cost.
Owner:YANFENG ADIENT SEATING CO LTD

Robotic gripper and control method

A robotic gripper including one or more fingers and at least one actuator for acting on the fingers in order to grip an object, the gripper including at least one sensor sensitive to a relative movement between the object manipulated by the gripper and the latter, this sensor delivering an output signal, a control system configured to execute at least one machine-learning algorithm trained to deliver, based on the one or more output signals generated by the one or more sensors, at least one slippage-detection score representative of the confidence of the algorithm in the presence of slippage, and to transmit control data to the actuators controlling the one or more fingers, the control data being generated so as to relate the strength of the forces applied by the one or more fingers to said score.
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

Ship navigation early warning method and device based on potential field, medium and product

The invention provides a potential field-based ship navigation early warning method and device, a medium and a product. The method comprises the steps of obtaining a ship state, a static obstacle set, a navigation rule set and environment disturbance and uncertainty information; carrying out dimensionless scale unification and risk mapping normalization on the information; obtaining a static environment potential field of the ship at the current track point based on the difference between the shortest distance from the track point to the static obstacle set and the safety redundancy; constructing a dynamic interaction potential field based on the target ship state and the relative motion urgency; triggering a navigation rule based on an encounter state identification result, generating a rule constraint and constructing a rule constraint potential field; expansion correction is carried out on the security redundancy based on the uncertainty information to construct an uncertainty correction potential field; fusing to obtain a total potential field; and obtaining a risk index and an early warning level according to the total potential field. According to the technical scheme, risk early warning is achieved based on the computable multi-dimensional safety potential field, and compliance, stability and robustness are improved under the conditions of complex water areas and multi-ship encounter.
Owner:JIMEI UNIV

Ring fire track passive angle measurement initial orbit determination method for Mars sampling return

The invention discloses an initial orbit determination method for passive angle measurement of a ring fire orbit for Mars sampling return, and the method comprises the steps: building an absolute dynamic model, obtaining an absolute motion state of a spacecraft, and deducing a relative motion state X; constructing a data set by using the measurement quantities H and X of the sensor; a network architecture is designed, input data I are position and speed coordinates of the tracker in a Mars equator inertial coordinate system and angle information converted from H, and output data are X; and finally, adjusting an observation interval dt and times k according to a ring fire observation condition, training a physical information neural network by using limited observation data, defining a total loss function F comprising a loss function FY and a physical law penalty term FD, and optimizing a weight coefficient and bias by minimizing the loss function through an F gradient descent method. According to the method, the neural network is trained offline, a network mapping model from a target line-of-sight angle measurement sequence to a target orbit is constructed, and the network mapping model is solidified on a returner for online use, so that sampler short-arc passive measurement rapid orbit determination is realized.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1

Bridge anti-collision early warning method and device

The invention provides a bridge anti-collision early warning method and device, and relates to the field of bridge anti-collision early warning. The method comprises the following steps: acquiring visual perception data corresponding to a target ship, and acquiring bridge structure data corresponding to a target bridge; constructing multi-source analysis data according to the visual perception data and the bridge structure data; according to the multi-source analysis data, obtaining a ship response lag factor set and a bridge structure risk constraint set through preprocessing operation; inputting the multi-source analysis data into a ship trajectory prediction model, and outputting a predicted trajectory path corresponding to the target ship; according to the predicted trajectory path and the ship response lag factor set, constructing a dynamic safety envelope area between the target bridge and the target ship; obtaining a dynamic safety envelope area, a bridge structure risk constraint set and a target intersection in the relative movement process of the target ship and the target bridge; and based on the target intersection, calculating a risk level of collision between the target ship and the target bridge, and sending an anti-collision early warning prompt to the target ship according to the risk level. According to the method, the problems of frequent occurrence of false alarm or missing report and remarkable early warning hysteresis caused by difficulty in effective modeling of ship nonlinear trajectory offset in a strong wind current environment in a traditional bridge anti-collision technology are solved.
Owner:HUBEI QIANXIONG CONSTR ENG CO LTD

Support systems for supporting equipment

Support system for supporting equipment comprising: a back support; shelves spaced from one another and extending from the back support and arranged to support the equipment, each shelf comprising: a connecting mechanism for providing a connected position in which the equipment is connected to the given shelf such that separation of the given shelf and the equipment along a first axis is blocked but relative movement along a second axis is possible; a locking mechanism for providing a locked position in which relative movement of the equipment and the given shelf along the second axis is blocked; and a release mechanism for releasing the locked position to permit the relative movement along the second axis, the release mechanism including an actuator on the given shelf or the equipment which can be actuated by a user.
Owner:TECH CGC INC

System comprising a power tool and an energy supply device

A system including a machine tool and a power supply device, the power supply device being provided for supplying the machine tool with electrical power. The power supply device can be detachably connected to the machine tool by means of an interface, the interface coincluding at least one female contact partner and one male contact partner. The interface has at least one elastic means for reducing a relative movement between the male contact partner and the female contact partner, the at least one elastic device for reducing the relative movement between the contact partners being designed to engage with the at least one male contact partner and / or the at least one female contact partner. The power supply device includes at least one energy storage cell, the at least one energy storage cell having an internal resistance DCR_I of less than 10 milliohm. Methods for connecting a power supply device to a machine tool via an interface, and to an interface itself are also provided. A power supply device for use in the system.
Owner:HILTI AG

Probe Motion Compensation

A system for compensating for a relative motion between a probe and an apparatus. The system includes a probe assembly, a sensor, and a computer. The probe assembly includes an actuator pack positioned exterior to the apparatus and a probe insertable into the apparatus. The probe includes a first end coupled to the actuator pack, a second end, and an elongated body extending therebetween. The sensor senses data indicative of a relative motion between the apparatus and the probe assembly. The computer is operably coupled with the sensor and the probe assembly to move the probe of the probe assembly in response to the sensor sensing the data indicative of the relative motion between the apparatus and the probe assembly.
Owner:GENERAL ELECTRIC CO +1

Cleaning device

The utility model provides cleaning equipment, and relates to the technical field of cleaning. The side brush assembly is movably connected with the machine body, and the side brush assembly is provided with a cleaning position making contact with the to-be-cleaned face and a lifting position separated from the to-be-cleaned face; the side brush assembly comprises a side brush shell and a cleaning part at least partially contained in the side brush shell, and when the side brush shell and the cleaning part are in the first relative motion state, the side brush assembly is located at the cleaning position so as to clean a to-be-cleaned face through the cleaning part; and when the side brush shell and the cleaning piece are in the second relative motion state, the side brush assembly is switched between the cleaning position and the lifting position. According to the cleaning equipment, the position of the cleaning assembly relative to the to-be-cleaned face can be flexibly controlled so as to prevent the cleaning assembly from polluting the to-be-cleaned face, the adaptability of the cleaning equipment to the environment can be improved, and the use experience of a user can be improved.
Owner:DREAM INNOVATION TECH (SUZHOU) CO LTD

A system for enhancing the damping capacity and aseismic capacity of the underground integrated pipe rack

The invention discloses a system for enhancing the damping and aseismic capacities of an underground integrated pipe rack. It includes a pipe fixing assembly installed on the inner walls of the underground space on both sides. The assembly comprises multiple lifting frames arranged vertically and a lifting mechanism. The telescopic end of the lifting mechanism is fixedly connected to the lowermost lifting frame. One side of the lifting frame is slidingly connected to the inner wall of the underground space and features a recess for placing the pipe. A pipe holder inside the recess secures the pipe. During vibrations, the lifting frame slides on the inner wall, causing relative movement between adjacent pipe holders. The vibration is absorbed by the telescopic spring, preventing hard contact between the pipe and the vibration source. This reduces vibration and protects the pipe, thereby enhancing the aseismic capacity of the underground pipe rack.
Owner:CAO XIULING +1