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155results about How to "Improve positioning reliability" patented technology
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Virtualized network fault rapid positioning method fusing multi-source information
The invention provides a multi-source information fused virtualized network fault rapid positioning method, and relates to the technical field of electric digital data processing, and the method comprises the steps: classifying and sorting historical fault events, constructing a historical dynamic evaluation model, correcting a calibration index, capturing equipment performance changes and abnormities, and enhancing the fault recognition capability. Similar faults are accurately classified and preferentially processed according to severity; in the real-time monitoring stage, real-time multi-source and abnormal data are combined, a real-time dynamic evaluation model and a correction calibration index are calculated, a ratio is applied to calculate a fine adjustment strategy, the real-time performance and accuracy of fault positioning are remarkably improved, and network dynamic changes are quickly responded. And carrying out difference analysis on the adjusted real-time model and the historical model, calibrating a preliminary fault positioning result, and improving the positioning precision and reliability.
Owner:BEIJING DONGFANG RONGCHUANG INFORMATION TECH CO LTD
ROV positioning navigation system and method based on visual inertial navigation fusion and pose correction
PendingCN119394308AAchieving High-Precision EstimationHigh positioning accuracyInternal combustion piston enginesNavigational calculation instrumentsMarine engineeringClassical mechanics
The invention discloses an ROV positioning navigation system based on vision inertial navigation fusion and pose correction, which comprises an inertial measurement value and image preprocessing module loaded on an ROV, the inertial measurement value and image preprocessing module is connected with a vision and inertial navigation data fusion module through a wire, and the vision and inertial navigation data fusion module is connected with a pose correction module. The invention also discloses a positioning navigation method of the ROV positioning navigation system based on visual inertial navigation fusion and pose correction. According to the method, the inertial data provided by the IMU and the environment characteristic information captured by the visual sensor are fused, high-precision estimation of the position and attitude of the ROV can be realized, the sensor data are optimally fused by using the MSCKF algorithm, the influence of the error of a single sensor on the positioning result is reduced, and the positioning precision and reliability of underwater operation are remarkably improved.
Owner:XIAN UNIV OF TECH
Robot positioning and navigation system and method based on multi-modal information fusion
ActiveCN119104056AHigh positioning accuracyImprove positioning reliabilityNavigational calculation instrumentsNavigation by speed/acceleration measurementsRobot positionEngineering
The invention discloses a robot positioning navigation system and method based on multi-modal information fusion, and belongs to the technical field of multi-source information fusion navigation. The invention discloses a robot positioning and navigation system based on multi-modal information fusion. The robot positioning and navigation system comprises a visual sensing module, an inertial measurement unit (IMU), a Beidou navigation receiver, a control processor and an electric control driver. The problems that in the prior art, the robot guiding mode is single, the positioning navigation precision and reliability are low, and the robot is difficult to adapt to the complex environment are solved; according to the invention, by fusing the positioning information of different guiding modes, such as vision, IMU and Beidou navigation information, the positioning precision and reliability of the robot in a complex environment are improved, and the robot can better adapt to low-texture scenes such as illumination change, large-angle curve motion and rapid motion.
Owner:МААНЬШАНЬ АЙРОН ЭНД СТИЛ КО ЛТД
Mine personnel positioning method and system based on wireless communication
ActiveCN119421104AHigh positioning accuracyImprove positioning reliabilityMining devicesParticular environment based servicesData acquisitionData acquisition module
The invention provides a mine personnel positioning method and system based on wireless communication, and relates to the technical field of mine safety, and the method comprises the steps of data collection, model construction, structure prediction, base station position and number definition, UWB base station installation, base station parameter setting, personnel positioning and positioning display. The system comprises a data acquisition module, a model construction module, a structure prediction module, a base station position and number definition module, a UWB base station installation module, a base station parameter setting module, a personnel positioning module and a positioning display module. According to the method, the installation positions and the number of the UWB base stations are defined, the UWB base stations are installed and base station parameters are set according to the coal mine channel prediction number and the terrain prediction structure, personnel positioning and displaying are carried out through the UWB base stations, the signal interference influence of the coal mine channel number and the dynamic change of the terrain structure on radio waves in the channel propagation process is overcome, and the working efficiency is improved. The purpose of improving the positioning accuracy of the underground personnel is achieved.
Owner:SHANDONG NEW YUNPENG ELECTRIC CO LTD
Self-adaptive positioning method based on CSI, electronic equipment and storage medium
ActiveCN119676824ALower deployment costsReduce maintenance costsParticular environment based servicesBiological modelsData miningSelf adaptive
The invention relates to the technical field of wireless network positioning, in particular to an adaptive positioning method based on CSI, electronic equipment and a storage medium. According to the method, high-discrimination fusion fingerprint data is generated through a fusion representation model according to amplitude information data and phase information data, and mapping between the high-discrimination fusion fingerprint data and corresponding physical positions in the environment is completed through a positioning model; the positioning model comprises an adaptive convolutional neural network composed of a source network and a target network, the source network processes data from a source domain, and the target network processes data from a target domain. The positioning model uses a self-adaptive convolutional neural network composed of a source network and a target network, so that the adaptability to the environment is improved.
Owner:JIANGXI NORMAL UNIV
A method for improving the positioning accuracy of unmanned aerial vehicle for observation targets
ActiveCN118758316Bimprove consistencyincrease credibilityInternal combustion piston enginesNavigational calculation instrumentsReal-time dataData set
The present invention provides a method for improving the positioning accuracy of an unmanned aerial vehicle for an observation target, monitoring a receiving end, obtaining first data, verifying the obtained first data, and then obtaining a real-time data set, filtering the data in the real-time data set, and obtaining first result data. By filtering the obtained first result data, a measurement point with the smallest error can be selected, and data with higher positioning accuracy can be obtained, thereby improving the accuracy of the positioning data, avoiding the inefficient process of analyzing a large amount of data one by one, and improving the measurement efficiency and positioning accuracy.
Owner:SPACE STAR TECH CO LTD
Steel bar field detector
ActiveCN222635966UImprove convenienceImprove positioning reliabilityMaterial strength using tensile/compressive forcesMaterial strength using steady shearing forcesRebarMechanical engineering
The utility model discloses a reinforcing steel bar field detector which comprises a base, supporting plates are fixedly connected to the upper ends of the two sides of the base, a top plate is fixed to the upper ends of the supporting plates, installation grooves are formed in the side faces of the supporting plates, positioning blocks are arranged in the installation grooves, and pressure detection modules are installed at the lower ends of the installation grooves. A rotary disc is arranged at the lower end of the top plate, a positioning frame is fixed to the lower end of the rotary disc through bolts, and air cylinders penetrate through the two sides of the positioning frame. According to the reinforcing steel bar on-site detector, the anti-shearing force and the anti-compression force of a reinforcing steel bar can be independently detected by arranging two groups of independent detection structures, and the position switching of the two groups of detection structures can be completed by utilizing a turntable structure, so that the use convenience is improved; and the positioning reliability and stability of the reinforcing steel bar during detection can be improved.
Owner:YIYANG ZECHENG PROJECT MANAGEMENT CONSULTING CO LTD
Rapid Beidou differential positioning method and system under dynamic condition
ActiveCN119247419AHigh positioning accuracyHigh precisionSatellite radio beaconingAlgorithmDynamic positioning
The invention belongs to the technical field of dynamic Beidou differential positioning, and discloses a rapid Beidou differential positioning method and system under a dynamic condition, and the method comprises the steps: constructing an inter-epoch single-difference error equation; observation value selection and reference epoch selection; high-sampling-rate data processing is realized by using a double-difference-single-difference model alternation strategy; and analyzing data. According to the rapid Beidou differential positioning method under the dynamic condition, the centimeter-level dynamic positioning result of the Beidou system is realized by using the inter-epoch single-difference model and the constructed combined observation value with the minimum noise when the double-difference model fails. According to the method for selecting the reference epoch, the influence of accumulation of coordinate errors on the coordinate precision of the moving carrier is avoided, and the method is more suitable for real-time dynamic data processing. A carrier phase combination observation value with the minimum noise is adopted, and the influence of observation value noise on the positioning precision is further reduced.
Owner:BEIJING LIGONG NAVIGATION TECH CO LTD
Combined lane-level navigation method adopting novel data transmission path
PendingCN119290022Alow costReduce communication costsInstruments for road network navigationNetwork topologiesTelecommunications linkIn vehicle
The invention discloses a combined lane-level navigation method adopting a novel data transmission path. The method specifically comprises the following steps: S1, integrating a high-precision positioning module on vehicle-mounted terminal equipment to form a mobile station; s2, a high-precision positioning module receives a satellite positioning signal, calculates position data, time and motion state data of the mobile station, and is used for providing positioning information at any time; s3, a data communication link is established between the mobile phone terminal and the mobile station through a short-distance wireless communication mode such as Bluetooth or Wi-Fi, and the mobile station sends satellite positioning data to the mobile phone terminal; s4, the mobile phone terminal establishes a data communication link with the CORS server through long-distance passing modes such as 4G or 5G, and sends the satellite positioning data of the mobile station to the CORS server; according to the invention, only two sets of communication links such as satellite communication and short-distance wireless communication are integrated in the mobile station, and the functions of high-precision positioning and lane-level navigation can also be realized. The equipment cost is reduced and the communication cost is saved by reducing the number of remote wireless communication modules.
Owner:SHENZHEN XIAOMA ZHIYUN TECH CO LTD
Fusion positioning method of molten iron tank car and related equipment
ActiveCN119618238AHigh precisionImprove reliabilityInstruments for road network navigationLinear/angular speed measurementData packIn vehicle
The invention discloses a molten iron tank car fusion positioning method and related equipment, and relates to the field of molten iron tank car positioning, the method comprises the following steps: building map information data in a plant area, the map information data comprising a signal machine position coordinate, a turnout position coordinate, a camera position coordinate, an end line soil block position coordinate and a level crossing position coordinate; gNSS original positioning data and DGNSS differential correction information of the molten iron tank car are obtained; determining high-precision GNSS differential positioning data based on the GNSS original positioning data and the DGNSS differential correction information; acquiring real-time speed data and running direction data based on a vehicle-mounted wheel speed meter; and updating and correcting the position of the molten iron tank car based on the real-time speed data, the running direction data, the high-precision GNSS differential positioning data and the map information data in the factory to obtain predicted position information of the molten iron tank car.
Owner:武汉钢铁有限公司
High-precision positioning platform based on flexible kinematic pair
ActiveCN119274641ASimple structureHigh precisionPiezoelectric/electrostriction/magnetostriction machinesInstrumental componentsSynchronous controlControl engineering
According to the high-precision positioning platform based on the flexible kinematic pair, high-precision positioning can be achieved, the overall structure of the platform is simplified, occupied space is reduced, and convenience of maintenance and troubleshooting is greatly improved. The bending of the flexible rod is converted into the translation of the rigid piece, so that the three translation degrees of freedom required by the platform are realized, and the purpose of replacing a branched chain by a single kinematic pair is achieved; a single kinematic pair is adopted in the X direction and the Y direction to replace a traditional multi-branch-chain structure, and therefore the platform structure is simplified. The second flexible branch chain and the four flexible kinematic pairs are arranged in a cross-shaped symmetrical mode, and flexible rods in the flexible kinematic pairs are connected in series reversely and arranged symmetrically. Two homonymous drivers are arranged on the same axis, and the two homonymous drivers are made to move in the same direction with the same displacement and force through synchronous control so as to achieve synchronous driving.
Owner:JIANGNAN UNIV
Real-time cycle slip detection and repair method for pseudo-satellite single-frequency observation
PendingCN119247415AHigh positioning accuracyImprove positioning reliabilitySatellite radio beaconingAlgorithmCarrier signal
The invention relates to a real-time cycle slip detection and restoration method for pseudo-satellite single-frequency observation, and the method comprises the following steps: data collection: obtaining observation data of adjacent epochs based on navigation signals of a receiver and a transmitter, and building a single-frequency carrier observation equation; carrying out time sequence differential processing, and carrying out subtraction on carrier phase observation values of adjacent epochs in combination with correction parameters; constructing a least square adjustment model, and performing parameter estimation by using the difference observed quantity; calculating a residual error after the test; introducing a statistical hypothesis to perform cycle slip detection and repair; and outputting a result. A least square adjustment model is constructed based on a time sequence difference model, and cycle slip detection and repair are realized through chi-square test of a post-test residual error, so that ambiguity initialization and position errors caused by false detection and missing detection are reduced, and the positioning precision and reliability of a pseudo satellite are improved.
Owner:NANJING TECH CENT OF WUXI KALMAN NAVIGATION TECH CO LTD +1
Focus positioning method based on cardiac ultrasonic image
InactiveCN119600107Aaccurate identificationHigh positioning accuracyImage enhancementImage analysisMultiscale decompositionRadiology
The invention provides a focus positioning method based on a cardiac ultrasound image, which belongs to the technical field of cardiac ultrasound images and comprises the following steps: firstly, preprocessing an original image to remove noise and artifacts; then, through multi-dimensional matrix comparison and multi-scale decomposition, two types of abnormal feature matrixes are extracted; after the two abnormal feature matrixes are fused, a heart abnormal region can be positioned more accurately. And then determining the boundary of the abnormal region by adopting a density clustering algorithm, thereby completing the accurate positioning of the heart focus. And finally, marking a positioning result on the processed cardiac ultrasound image to form a visual focus positioning image. According to the method, the technologies of image preprocessing, feature extraction, anomaly detection, region segmentation and the like are combined, the focus region of the heart disease can be accurately positioned, and the technical problem that an existing neural network image recognition method is prone to ignoring details due to detail differences existing in heart ultrasonic images of different patients is solved.
Owner:QINGDAO MUNICIPAL HOSPITAL
Reduction gearbox with 90-degree steering output
ActiveCN222526800UEnsure key teeth accuracyReduce backlashToothed gearingsGearing detailsControl engineeringControl theory
The utility model relates to a 90-degree steering output reduction gearbox, which comprises an outer box, an input shaft assembly, a middle shaft assembly and an output shaft assembly are arranged in the outer box, the middle shaft assembly is meshed with the input shaft assembly, the output shaft assembly is meshed with the middle shaft assembly, and the input shaft assembly is parallel to the middle shaft assembly and is perpendicular to the output shaft assembly. The output shaft assembly comprises a bevel gear wheel meshed with the intermediate shaft assembly and an output shaft in bolted connection with the bevel gear wheel, the bevel gear wheel is arranged in the shell, the output shaft extends out of the shell to be arranged in a bearing seat, and an output end bearing assembly matched with the output shaft and an output end oil seal assembly for sealing the bearing seat and the output shaft respectively are arranged in the bearing seat. The front end and the rear end of the input shaft assembly extend out of the shell. The utility model reduces the maintenance cost, can be matched with the power input of a high-power tractor, improves the transmission efficiency, reduces the noise and vibration, has high sealing reliability, and can effectively reduce the oil leakage.
Owner:ZHUZHOU GEAR CO LTD
Highway long tunnel real-time fire source detection method and system based on multi-modal fusion
The application discloses a kind of based on multimodal fusion expressway long tunnel real-time fire source detection method and system, it is estimated by introducing smoke temperature airflow dynamic propagation delay under wind speed constraint, visible light, infrared, smoke concentration and environmental temperature and so on heterogeneous data are phase shift compensation and space-time unification, different modal can correspond to the same fire physical time, then respectively extract visual side flame profile, thermal gradient feature and sensing side smoke temperature mutation, time evolution characteristics, and utilize cross-modal interactive fusion to form the fusion feature expression with image representation ability and environmental perception ability, finally, combine target detection and inverse perspective positioning Output fire confidence and fire source coordinates, to solve the problem that multi-source data is difficult to effectively align, early fire source feature weak leads to inaccurate identification, false alarm under complex disturbance is higher and fire source position is difficult to determine in real time accurately, improve the real-time, accuracy and engineering applicability of tunnel fire source detection.
Owner:LUOYANG INST OF SCI & TECH
A locking mechanism for a diagonal tie rod in an outward-opening, top-hung hardware system.
ActiveCN224282274UAvoid the cumbersome installation processSimplify the assembly processWing fastenersSash windowMechanical engineering
A locking mechanism for a diagonal tie rod in an outward-opening, top-hung hardware system is disclosed. The diagonal tie rod includes a movable tie rod slidably mounted on a base for positioning a first connecting rod. The base has a first connecting rod with a limiting groove at one end near the base. The positioning device includes a limiting block with a locking part. When the window sash needs to be opened to its maximum position, the locking part extends out of the base and engages with the limiting groove to form a limiting connection, thus locking the window sash. The movable tie rod has an unlocking part. When the window sash needs to be closed, the locking part slides within the base driven by the handle. The unlocking part abuts against the limiting block, creating a lever effect that disengages the locking part from the limiting groove, thereby releasing the locked state of the window sash.
Owner:WEN ZHOU CHUN GUANG WU JIN YOU XIAN GONG SI
Battery box
ActiveCN222601223UImprove positioning reliabilityHigh positioning accuracyCell component detailsElectrical batteryStructural engineering
The utility model relates to the technical field of energy storage, in particular to a battery box. The battery box comprises a box body and a battery assembly, the battery assembly comprises a plurality of single batteries, the single batteries are sequentially arranged in a row in the first direction in the posture that the large faces are opposite, and the large faces of every two adjacent single batteries in each row are bonded; the box body comprises a frame, the frame comprises a first surrounding plate and a second surrounding plate, and the first surrounding plate and the second surrounding plate respectively press the two ends of the battery assembly in the first direction; the frame further comprises a third coaming and a fourth coaming, the third coaming and the fourth coaming respectively press the two ends of the battery assembly in the second direction, and the first direction and the second direction are arranged in a crossed mode; the first coaming, the third coaming, the second coaming and the fourth coaming are sequentially connected in a fastened mode. According to the frame of the box body of the battery box, each single battery is prevented from moving and misplacing through the pressing force and the pressing stroke, the complexity of the assembling process and the structure is reduced, and the positioning reliability and the positioning precision of the box body on a battery assembly are improved.
Owner:SUNWODA ENERGY TECHNOLOGY CO LTD
Water dispenser convenient to assemble
ActiveCN222323349UPrevent deviationlower requirementBeverage vesselsStructural engineeringFront cover
The water dispenser convenient to assemble comprises a dispenser body, the dispenser body comprises a shell with a mounting cavity, the mounting cavity is provided with a front side opening, the dispenser body further comprises a front cover used for sealing the front side opening, and a surrounding edge protruding in the direction away from the front cover is arranged on the circumferential edge of the front cover; the shell is provided with a guide part, the surrounding edge is in guide fit with the guide part to pre-position the front cover, and a buckle structure for fixing the front cover and the shell is further arranged between the front cover and the shell. When the front cover and the shell are assembled, pre-positioning of the front cover can be realized through matching of the surrounding edge and the guide part, on the basis, the front cover and the shell are fixed, so that the assembling difficulty is reduced, the assembling efficiency is improved, and the front cover can be prevented from deviating from the mounting position in the mounting process through pre-positioning of the front cover; the front cover and the shell are fixed, favorable conditions are provided for fixing the front cover and the shell, the requirement for operators is low, the front cover and the shell are fixed in a buckled mode, operation is easy, and efficiency is high.
Owner:JOYOUNG CO LTD
Sound source localization and voiceprint recognition fused method, chip and electronic equipment
PendingCN121999784AImproved accuracy of identity-location associationImprove processing efficiencySpeech analysisPosition fixationSound sourcesEngineering
The invention relates to an acoustic signal processing and biological recognition technology, in particular to a method for fusing sound source localization and voiceprint recognition, a chip and electronic equipment. The method comprises the following specific steps: synchronously acquiring an environment audio signal through an audio acquisition module array and processing the environment audio signal to obtain audio data; and analyzing the audio data to obtain deep fusion voiceprint features. And judging whether a registered user feature library contains the deep fusion voiceprint feature or not, if so, outputting a sounder identity, and if not, marking and endowing an identification number of the sounder identity. And positioning the sound source based on the audio data to obtain a space coordinate thereof. And establishing an identity-position association model, binding identity information output by voiceprint recognition with space coordinates obtained by sound source positioning, and generating identity-position association data. According to the method, the technology is fused and innovated, accurate linkage of identity-position is realized, high real-time performance and strong anti-interference capability are realized, and the method is adaptive to complex scenes.
Owner:杭州智芯科微电子科技有限公司
Positioning system switching method and device, equipment and medium
PendingCN119644389AMeet the positioning needsGuaranteed positioning accuracySatellite radio beaconingHigh level techniquesComputer hardwareAutomatic control
The invention discloses a positioning system switching method and device, equipment and a medium, and relates to the technical field of automatic control, and the method comprises the steps: obtaining first navigation information, when the first navigation information does not meet a preset positioning requirement, obtaining a second positioning system attribute and a second positioning system configuration, and when the second positioning system attribute and the second positioning system configuration both meet the preset power-on requirement, sending a control instruction, starting the second positioning system, switching the navigation mode into a second navigation mode, and obtaining second navigation information. When GPS positioning is not accurate, other positioning systems are switched to ensure the positioning precision, improve the positioning reliability and meet the positioning requirements in different scenes.
Owner:无锡宇宁科技集团股份有限公司
An indoor positioning system for fire safety evacuation
ActiveCN121531457BHigh positioning accuracyImprove positioning reliabilityParticular environment based servicesAlarmsUltra-widebandSimulation
The application discloses a kind of indoor positioning systems for fire safety evacuation, it is related to fire safety technical field, the indoor positioning system includes positioning terminal, wireless communication module, server and fire equipment control module, positioning terminal is worn on the body of indoor personnel, for real-time acquisition personnel's position information, and position information is sent to server by wireless communication module, server receives position information, and personnel is positioned according to stored high-precision indoor map, simultaneously, server also sends personnel's position information to fire equipment control module, to make fire equipment control module control the operation of fire equipment according to personnel position information, the indoor positioning system for fire safety evacuation of the application has very high positioning accuracy and reliability, positioning terminal uses ultra-wideband UWB positioning technology, can accurately determine personnel position in complex indoor environment.
Owner:NANTONG JUNYUAN INFORMATION TECH CO LTD
Bidirectional photoelectric measurement cooperative positioning method
PendingCN121978696AHigh precisionLow latency positioningNavigation by speed/acceleration measurementsElectromagnetic wave reradiationElectromagnetic interferenceElectromagnetic environment
The invention provides a bidirectional photoelectric measurement cooperative positioning method, which is used for realizing high-precision and low-delay cooperative positioning through bidirectional photoelectric distance measurement and direction finding and data link synchronization between an unmanned ship and a patrolling flight device when the navigation equipment of the patrolling flight device has short-time faults (such as electromagnetic interference, shielding and high maneuvering states). The unmanned surface vehicle and the patrolling flying devices measure the other one by using self photoelectric equipment respectively, and position estimation values of the two patrolling flying devices are independently calculated respectively based on the high-precision position of the unmanned surface vehicle; the collaborative weight coefficient is calculated according to the measurement error of the photoelectric equipment of the two parties, weighted average fusion is carried out at the patrolling device end, the optimized positioning result is directly output, and the delay error caused by back-and-forth transmission of a data chain is effectively avoided. And reliable positioning information can be obtained by the patrolling device in a complex electromagnetic environment and a maneuvering condition. The method is suitable for a cooperative scene of the unmanned surface vehicle and the patrol aircraft, and has the advantages of good real-time performance, strong anti-interference performance, low cost and the like.
Owner:BEIJING INST OF AEROSPACE CONTROL DEVICES
A light-transmitting cement-based material preparation device and use method thereof
ActiveCN112917642Bquality improvementinfluential impactAuxillary shaping apparatusFiberMaterials preparation
The invention relates to a light-transmitting cement-based material preparation device and a method for using the same, and belongs to the technical field of light-transmitting cement-based material production equipment, comprising: a bracket; a placement frame, which is vertically arranged on one side of the bracket and suspended in the air, and the placement frame is connected to the bracket; a wire-laying component, which is arranged just above the placement frame and is used to fix optical fibers; a plurality of frame plates, which are horizontally stacked inside the placement frame; a fixing component, which is arranged inside the placement frame and is used to fix the frame plates; a cutting component, which is arranged below the placement frame and is used to cut the optical fibers in a horizontal direction; the invention ensures the standardization of frame construction through the gravity of the frame plates and the optical fibers themselves, and the electric heating riveting plate can not only cut the optical fibers but also form a connection anchor point between the optical fibers and the frame plates, so as to prevent the displacement of the optical fibers during the pouring process and improve the quality of preparing light-transmitting cement-based materials. The invention is simple to operate, easy to use, highly practical, and worthy of promotion.
Owner:武夷学院
A thin-walled part positioning and clamping device
This invention discloses a positioning and clamping device for thin-walled parts, including a hydraulic clamping module and a quick positioning module. The hydraulic clamping module includes a base, and an expansion sleeve is installed in the inner cavity of the base, forming a sealed hydraulic oil chamber between the expansion sleeve and the inner cavity sidewall of the base. The quick positioning module includes a positioning shaft, and a disc is coaxially arranged at the lower part of the positioning shaft. The bottom of the positioning shaft passes through the disc and mates with a central positioning hole on the bottom surface of the inner cavity of the base. The positioning shaft is assembled in the inner cavity of the base. An installation hole is opened on the side of the disc and extends into the disc. A positioning block is installed in the installation hole by a spring. The front end of the positioning block has a toothed structure, and the spring can push the front end of the positioning block to the outside of the disc. A connecting groove communicating with the installation hole is opened on the upper surface of the disc. The lower end of the handle is inserted into the connecting groove and connected to the positioning block by a pin. A through groove is opened on the positioning shaft. The handle passes through the through groove, and the middle part of the handle is installed in the through groove by a pin.
Owner:QINGAN GROUP CO LTD
Single-layer Compton camera system and imaging method
PendingCN121995426ASimple structureminiaturizationRadiation intensity measurementNuclear radiationEnergy information
The invention discloses a single-layer Compton camera system and an imaging method, and relates to the technical field of nuclear radiation imaging. The system comprises a single-plane pixel type gamma ray detector used for collecting gamma ray interaction event data, including time information and energy information of each interaction and two-dimensional position information in a detector plane, and forming pixel counting distribution; the shielding structure is arranged on one side of the plane of the detector, is located in a local area of the detector and is used for enabling pixel counting distribution to generate a local counting missing feature when gamma rays are incident from one side where the shielding structure is located; and the judging and imaging module is used for judging a gamma ray incident side based on the local counting missing feature and executing Compton imaging reconstruction in a corresponding hemispherical view field range according to the judged incident side. According to the invention, partitioned omnidirectional imaging can be carried out on the radioactive source under the condition that a detector does not need to act on depth information, and meanwhile, generation of mirror image artifacts is avoided.
Owner:UNIV OF SCI & TECH BEIJING
A method, apparatus, device, and medium for real-time monitoring of cracks in an additive manufacturing process
PendingCN122109103ARealize online automated processingRealization judgmentMaterial analysis using wave/particle radiationAdditive manufacturing apparatusData setSoftware engineering
The present application relates to a kind of additive manufacturing process crack real-time monitoring method, device, equipment and medium, comprising: S1.in the additive manufacturing process, the laser radiation signal for forming piece is collected in real time and conversion, and the converted electric radiation characteristic signal is handled, and the radiation signal thermogram of forming piece is obtained;S2.to the forming piece simultaneously carries out CT scanning and obtains image data, and after processing, crack characteristic distribution chart is obtained;S3.radiation signal thermogram and crack characteristic distribution chart correspond with the layer number of forming piece, and the radiation signal crack characteristic data set corresponding to layer by layer point by point is obtained;S4.data set is used to train machine learning or deep learning model, and crack determination model is obtained;S5.crack determination model is used for online monitoring to carry out crack identification.The method of the present application can form the radiation signal crack database corresponding to layer by layer point by point in three-dimensional space, and the data consistency and migratability are improved.
Owner:UNIV OF SCI & TECH BEIJING
A pseudorange robustness method for inertial navigation-assisted BeiDou heterogeneous constellations
ActiveCN119247433BHigh precisionImprove reliabilitySatellite radio beaconingComplex mathematical operationsAlgorithmSatellite observation
The present invention provides an inertial navigation-assisted Beidou heterogeneous constellation pseudo-range anti-error method, constructs a noise matrix R, distinguishes satellites according to satellite observation signals and constructs a heterogeneous constellation model, calculates the standard deviation of the heterogeneous constellation model, calculates the standard deviation of pseudo-range observation values by error propagation law and standard deviation, and constructs the noise matrix R based on the standard deviation; constructs an anti-error factor, obtains Beidou pseudo-range observation values and inertial navigation position observation values, obtains Beidou pseudo-range observation value residuals by inertial navigation position observation values, and constructs an anti-error factor based on the pseudo-range observation value residuals; combines filtering, constructs an equivalent covariance matrix according to the noise matrix R and the anti-error factor, performs combined filtering and solving based on the equivalent covariance matrix, and obtains a combined navigation result. The present invention can improve the positioning reliability and stability of the BDS / IMU tight group positioning system.
Owner:华芯拓远(天津)科技有限公司
Tray for position switching of rotary nailing machine
ActiveCN224131793Ureduce waiting timeImprove work efficiencyExternal framesContainers to prevent mechanical damageControl engineeringControl theory
The utility model relates to the technical field of trays, in particular to a tray for switching positions of a rotary nailing machine, which comprises a supporting component, a positioning component, a positioning component and a rotating component, and is characterized in that the side surface of the supporting component is fixedly connected with the positioning component; the supporting assembly comprises a bottom frame, a stabilizing frame is fixedly connected to the bottom of the bottom frame, a rotating disc is fixedly connected to the center of the stabilizing frame, the side surface of the bottom frame is fixedly connected with the positioning assembly, and the positioning assembly comprises a containing frame. When wide foot piers on the placing frame on one side are fixed through the clamping frame and the limiting clamping plate and rotate to the side of the nail shooting robot for nail shooting, the placing frame on the other side can synchronously clamp and fix new foot piers, alternate operation on the two sides is achieved, the waiting time is greatly shortened, and the overall operation efficiency is improved.
Owner:CHONGQING BENEL TECHNOLOGY CO LTD
Support structure
ActiveCN222597203UImprove positioning reliabilityeasy to carryMechanical engineeringIndustrial engineering
Owner:SHENZHEN ZHENGHAIXIN TECH CO LTD
DVL error correction method, device and system based on BP neural network and particle swarm optimization
ActiveCN119513446AImprove efficiencyHigh precisionArtificial lifeTesting/calibration of speed/acceleration/shock measurement devicesQuaternionEngineering
The invention discloses a DVL error correction method and device based on a BP neural network and particle swarm optimization. The method comprises the following steps: step 1, establishing a DVL speed measurement model; step 2, establishing a DVL error loss function, replacing # imgabs 1 # with an equivalent quaternion # imgabs 0 #, and reorganizing each item; and step 3, iterating by using a BP neural network and a particle swarm optimization algorithm to obtain a minimum value, and calibrating the DVL error calibration by using the minimum value. According to the invention, the optimization speed and accuracy of the calibration process can be ensured.
Owner:HUNAN UNIV