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86 results about "Track initiation" patented technology
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Multi-radar plot fusion method
InactiveCN106680806AImprove detection distanceImprove tracking performanceCharacter and pattern recognitionRadio wave reradiation/reflectionDoppler velocityRadar network
The invention belongs to the technical field of multi-radar networking plot fusion, and particularly relates to a multi-radar plot fusion method. The method comprises the following steps of 1, receiving multiple pieces of radar measurement data, conducting space alignment and setting a uniform measurement coordinate system; 2, judging whether the radar measurement data all contains target Doppler velocity information or not, if yes, executing the step 3, and otherwise, executing the step 6; 3, conducting time alignment; 4, conducting plot association and plot fusion to obtain fused plot information; 5, conducting track association with a formed track and filtering updating by utilizing the fused plot information, and executing the step 7; 6, sorting the data by time, and conducting track association with the formed track and filtering updating in sequence by utilizing the sorted data; 7, conducting track initiation by utilizing the radar data which does not participate in track association; 8, outputting a track result. The multi-radar plot fusion method is beneficial to prolonging the target detection distance and improving the tracking precision and the maneuvering target tracking performance.
Owner:TSINGHUA UNIV
Multi-target tracking method based on ground moving target indication radar system
InactiveCN101614817AImprove performanceGood tracking resultRadio wave reradiation/reflectionRadar systemsMulti target tracking
Owner:BEIHANG UNIV
Method for rapid tracking target based on radar trace points
InactiveCN104991235AImprove tracking accuracyImprove real-time performanceWave based measurement systemsRadarStart up
The invention discloses a method for rapid tracking a target based on radar trace points, and belongs to the field of vehicle tracking of intelligent traffic. The method transmits position information of a target vehicle based on a vehicle-mounted radar in a trace point manner. All first-time incoming trace points after start-up of the radar are taken as track initiation, and a wave gate corresponding to each trace point is calculated. An incoming trace point at the next moment matches the wave gate of the previous moment, the track initiation is successful if matching is successful, and the trace points saved at the previous time are clear away if the matching is not successful. If a plurality of the trace points are disposed in a certain wave gate, agglomeration processing needs to be performed on the trace points; and, if a certain trace point falls into the different wave gates respectively, each corresponding wave gate processes the trace point. Through design of a relationship between the trace points, the rapid track initiation is achieved. The scheme further designs an improved data association algorithm, and the objects of improvement of the correct rate of associations and reduction of the computational complexity are achieved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Heterogeneous multi-sensor multi-target tracking method
ActiveCN109508000AImprove accuracyImprove real-time performancePosition/course control in two dimensionsMulti target trackingCovariance
The invention provides a heterogeneous multi-sensor multi-target tracking method, which can rapidly start a target track, reduce calculation amount and improve track tracking accuracy and continuity.The method is realized through the following technical scheme: a track initiation and maintenance module, a track trimming and confirmation module, a hypothesis generation and management module, a track updating and merging module and a track management output module are arranged in a heterogeneous multi-sensor multi-target tracking system, the track initiation and maintenance module roughly classifies measurement data according to attribute characteristics and position grids of the measurement data, and according to the rough classification result, measuring points falling into an existing target track tracking wavegate are sent to the track trimming and confirmation module as candidate point tracks, the tracks confirmed by sequence probability ratio inspection are sent to the hypothesisgeneration and management module for track clustering and hypothesis generation, a target filtering model is determined through the track updating and merging module, the tracks are updated through filtering, and latest covariance information is output through the track management output module.
Owner:10TH RES INST OF CETC
Ship track logic initiation algorithm
ActiveCN107255803AImprove initial efficiencyMake up for the shortcomings of absolute rulesWave based measurement systemsRadarFalse alarm
The invention discloses a ship track logic initiation algorithm. The ship track logic initiation algorithm comprises steps that temporary track losing point classification discrimination, distance changing rule statistic discrimination, maneuverability analysis discrimination, namely suppression discrimination of continuous N-shaped false track having course deviation greater than or equal to 90 degrees and target speed, course, acceleration fluctuation discrimination are established by radar scanning. The ship track logic initiation algorithm is advantageous in that under a condition of severe clutter environment, by combining various track initiation rules, an initiation false alarm rate of a false target is reduced, and real target track initiation accuracy is improved, and therefore subsequent target stability tracking is facilitated, and probabilities of false track wrong following and real track losing are reduced.
Owner:CHINA INFORMATION & ELECTRONICSE DEV HEFEI
Improved logic-based track initiation method
InactiveCN103727931AHigh precisionReduce computing timePicture interpretationUsing reradiationCorrelation coefficientComputer vision
The invention provides an improved logic-based track initiation method. The improved logic-based track initiation method comprises the steps of registering a temporary track for each tracking target by taking a measuring point of the tracking target in a first frame image as an initial point, and taking the correlation coefficient of each tracking target as the correlation coefficient of the corresponding temporary track; by taking the measuring point, in the circular correlation area of measuring points of the first frame image, of a second frame image as a second point, adding into the corresponding temporary track; when one measuring point is added into the temporary track of the tracking target, accumulating the correlation coefficient of the temporary track, and when the accumulation sum of the correlation coefficients is greater than or equal to a preset judgment threshold, adding the temporary track into a queue of temporarily successful track for carrying out track pruning, and then outputting an effective track. The improved logic-based track initiation method has different track initiation requirements after different targets are achieved, the track initiation precision can be enhanced, and the calculation time can be shortened.
Owner:NANJING UNIV OF SCI & TECH
Measurement storage-based track initiation method
ActiveCN106199584AFast track start speedImprove the probability of successful trackingRadio wave reradiation/reflectionRadar systemsAsynchronous communication
The invention discloses a measurement storage-based track initiation method. The method is applied to target tracking of narrow-transmitting multi-receiving track-while-scan radar system and a passive tracking system in actual scenes. According to existing tracking algorithms, most algorithms assume that targets can be observed continuously and the measurement information of different targets are synchronous. According to the method of the invention, a condition that time intervals when a target is observed by a track-while-scan radar system is inconstant is considered; and historical measurement information is fully utilized, higher track initiation speed and successful tracking probability can be realized. With the measurement storage-based track initiation method of the invention adopted, track initiation problems of a centralized tracking system and a passive tracking system in multi-sensor asynchronous communication can be solved. The method has the advantages of full utilization historical information, simplicity in implementation and higher successful track probability, and can assist in effectively solving track initiation problems under a condition that the measurement information of different targets is asynchronous.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Radar global target track automatic initiation method based on environmental perception
ActiveCN111650581AImprove automatic admission capabilitiesImprove initial accuracyICT adaptationRadio wave reradiation/reflectionEnvironmental perceptionEngineering
The invention provides a radar global target track automatic initiation method based on environmental perception. The method comprises the following steps of 1, carrying out azimuth distance grid quantization on a radar detection area, 2, comprehensively perceiving and evaluating clutter environment and intensity from a signal layer and a data layer by utilizing a point track and original echo data of the radar, and establishing an environment perception map,3, enabling each grid unit toobtain different area attributes through the environment perception map, mapping the point track informationto the corresponding network cell according to the mapping position, and giving the point track information to the attributes of the network cells, and 4, adopting a multi-channel parallel tracking processing architecture to carry out dual-channel automatic track initiation and conventional sea target channel on the target, adopting environment perception and target multivariate characteristics to carry out fine track initiation processing, adopting a low-speed small target channel, and adopting a DP-TBD-based weak and small target detection algorithm to carry out track initiation, and 5, carrying out system track integration, and outputting an initial integrated track.
Owner:NANJING LES ELECTRONICS EQUIP CO LTD
Single scan track initiation for radars having rotating, electronically scanned antennas
InactiveUS20070164897A1Sufficient predictive validityLimited setRadio wave reradiation/reflectionPredictive validityRadar systems
A method and radar system for detecting a target and verifying its presence to begin tracking and to enable future detections of the same target to be correctly associated with its initial detection uses two separate detections. Each detection provides three components of position measurements (range, elevation, and azimuth). The invention also pertains to an associated method for initiating a target track utilizing a rotating radar antenna having an electronic scanning antenna comprising the steps of: acquiring data representative of one or more of range, elevation and azimuth of a target, calculating target motion, forming multiple models for each degree of freedom of target motion, composing a set of initial state vectors that includes one having predictive validity for the realization of the true measurement errors and target motion.
Owner:LOCKHEED MARTIN CORP
Radar track initiation method based on location information and Doppler information
ActiveCN106405537AAccurate removalIncrease the probability of startingRadio wave reradiation/reflectionRadarDistance constraints
The invention puts forward a radar track initiation method based on location information and Doppler information in order to solve the technical problem that the existing sequential processing technical method is of low track initiation efficiency. The method is implemented by the steps as follows: calculating the maximum unambiguous velocity; selecting a track head from measurement vectors scanned at the kth time, and calculating a radial velocity set; building a distance constraint accord to the radial velocity; building a space constraint according to the maximum velocity; during (k+1)th scanning, associating measurement vectors which are on the same Doppler channel with the track head and meet the two constraints; using effective measurement vectors to update the distance constraint, and continuing the association operation; building a stable track according to the track initiation criterion; and traversing the measurement vectors scanned at the kth time and a corresponding radial velocity set. The method of the invention is of high track initiation efficiency, and can be used in target tracking.
Owner:XIDIAN UNIV
Detection and tracking integration method for frame constant false-alarm target
ActiveCN103809173AImprove detection rateImprove continuityRadio wave reradiation/reflectionData setDetection threshold
The invention discloses detection and tracking integration method for a frame constant false-alarm target. Through the method, the problems of low target detection probability and short target tracking distance in the prior art are solved. According to the detection and tracking integration method, the implementation process comprises the following steps of: 1) obtaining an initial state estimation value and an initial state estimation covariance matrix of the target by a track initiation algorithm; 2) determining a target prediction gate of the kth frame according to the target state estimation value of the k-1th frame and the state estimation covariance matrix of the k-1th frame; 3) calculating the false-alarm probability and detection threshold of each detection unit in the target prediction gate of the kth frame; 4) detecting an echo signal in the target prediction gate, and estimating a target parameter as a measurement data set of the kth frame; and 5) performing relevance and filtering on the measurement data set of the kth frame to obtain a target state estimation value and a state estimation covariance matrix of the kth frame. Compared with the conventional detection and tracking method, the detection and tracking integration method has the advantages that the detection probability of the target is improved, and the tracking distance of the target is expanded.
Owner:XIDIAN UNIV
Multi-characteristic information fusion method for target data correlation
ActiveCN105487061AImprove execution efficiencyReduce false dotsWave based measurement systemsPattern recognitionPoint correlation
The invention relates to a multi-characteristic information fusion method for target data correlation and belongs to the technical field of radar data processing. The method comprises the following steps: 1) trace point pretreatment: screening data and storing the screened data according to frame; 2) target classification: classifying targets into three classes according to target speeds; 3) point-point correlation: carrying out track initiation by utilizing an m / n logical approach, and adopting different correlation strategies for different types of targets; 4) point-track correlation: carrying out extrapolation on a target track, and searching target candidate echoes according to a Bayesian data correlation algorithm; 5) feature similarity computation: extracting feature information of the candidate echoes and calculating feature similarity; and 6) comprehensive correlation degree computation: calculating comprehensive correlation degree according to the feature similarity and feature weight, and selecting the candidate echo, the comprehensive correlation degree of which is the largest, as target measurement. The method can reduce the number of the target candidate echoes, reduces operation burden, improves reliability of data correlation under a dense clutter background, and has a popularization and application value.
Owner:NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
Tracking initiation method including radial velocity information for a circular motion target
InactiveCN105044710AExtended Portal TypeHigh feasibilityRadio wave reradiation/reflectionRadar observationsRadar systems
The invention discloses a tracking initiation method including radial velocity information for a circular motion target. The method comprises the following steps: first, based on motion features, establishing a continuous motion equation of the target, and converting the continuous motion equation of the target to a discrete motion equation; secondly, establishing a radar observing model which includes the radial velocity information in a polar coordinate system; thirdly, based on the features of a multiple frequency cw radar as described that the multiple frequency cw radar can not only obtain distance and angle information, but can also obtain velocity information, designing a tracking initiation gate which includes the radial velocity information; finally, configuring a tracing initiation flow chart which includes the radial velocity information. The method herein is applicable to radar systems which can provide velocity information, such as a multi-frequency cw radar system, a pulse Doppler radar system, etc. The method is also applicable to tracking initiation of a horizontal circular motion target, and can increase the effects of tracking initiation. In addition, the method herein is not only applicable to tracking initiation of horizontal circular motion, but is also applicable to other target motion patterns, and has excellent expansibility and value in popularization and application.
Owner:袁俊泉 +2
First-initiation second-confirmation radar track initiation method
ActiveCN106054150ALow false track probabilityWave based measurement systemsRadar systemsInitial window
The invention belongs to the technical field of radars, discloses a first-initiation second-confirmation radar track initiation method and mainly solves the problem of an existing radar system that the target track initiation probability is relatively low. The method comprises the steps of: 1) setting a detection judgment false alarm probability, determining a detection threshold, and processing echo signals to form detection statistics and measured data; 2) according to the measured data, establishing an initial track according to a track initiation criterion; 3) enabling the initial length value of a track confirmation window to be the length of a track initial window; 4) calculating a false point trace probability and a false track probability of the mth initial track in the track confirmation window; 5) according to the false track probability of the mth initial track, determining whether the initial track is a target track, if a track ending criterion is met, then cancelling the track, and if the track is not determined nor cancelled, then adding one to the track confirmation window and returning to the steps 4); and 6) traversing all the initial tracks. Compared with an existing track initiation method, the initiation probability of the target track is improved.
Owner:XIDIAN UNIV
Single scan track initiation for radars having rotating, electronically scanned antennas
InactiveUS7508336B2Sufficient predictive validityLimited setRadio wave reradiation/reflectionPredictive validityObservational error
A method and radar system for detecting a target and verifying its presence to begin tracking and to enable future detections of the same target to be correctly associated with its initial detection uses two separate detections. Each detection provides three components of position measurements (range, elevation, and azimuth). The invention also pertains to an associated method for initiating a target track utilizing a rotating radar antenna having an electronic scanning antenna comprising the steps of: acquiring data representative of one or more of range, elevation and azimuth of a target, calculating target motion, forming multiple models for each degree of freedom of target motion, composing a set of initial state vectors that includes one having predictive validity for the realization of the true measurement errors and target motion.
Owner:LOCKHEED MARTIN CORP
Filtering algorithm based on self-adaptive new target strength
InactiveCN104501812AEasy to trackIncrease the scope of applicationNavigational calculation instrumentsRadio wave reradiation/reflectionMulti target trackingFilter algorithm
The invention discloses a PHD (probability hypothesis density) filtering algorithm based on self-adaptive new target strength. The PHD filtering algorithm is implemented through the following steps: carrying out track initiation and track confirmation; constructing a strength function of a new target random set according to confirmed track initiation position information; merging a new target strength function constructed by current frames with a known new target strength function at previous moment so as to produce an adaptive new target strength function of the current frames; starting a PHD filter by using the adaptive new target strength function so as to complete the prediction and updating of the PHD filter; and carrying out multiple target state extraction. According to the Bayesian multiple target tracking method based on the filtering algorithm, a new target strength function is constructed only according to measurement information completely without using priori information. The algorithm can be used for solving the problem that an original PHD filter lacks a new target tracking function. The algorithm has the advantages that a new target of which the position is unknown can be tracked well, so that the application range is enlarged, the robustness of the PHD filter is improved, and the like.
Owner:JIANGNAN UNIV
Multi-target track initiation method based on Hough transform
ActiveCN109613483AEffective from the startReduce false trackWave based measurement systemsHough transformPattern recognition
The invention discloses a multi-target track initiation method based on Hough transform, which comprises the following steps: S1, performing Hough transform on frequency gate information of measurement point traces in M scanning periods in a sliding window, and projecting the frequency gate information to a parameter space; S2, finding a frequency dimension accumulation point greater than a threshold value in the parameter space, and recording coordinates; S3, determining an association point contributing to the frequency dimension accumulation point in each scanning period according to the coordinate information of the frequency dimension accumulation point; S4, deleting redundant frequency dimension accumulation points of the same target according to the association point information ofthe frequency dimension accumulation points; S5, conducting distance dimension Hough transform on the remaining frequency dimension accumulation points, and projecting the remaining frequency dimension accumulation points to the parameter space; and S6, finding a distance dimension accumulation point greater than a threshold value in the parameter space, and carrying out reliability judgment on the association point.
Owner:SHANGHAI RADIO EQUIP RES INST
High frequency ground wave radar remote track initiation method and device
The invention provides a high frequency ground wave radar remote track initiation method, which comprises the following steps of: extracting feature values of a trace point, wherein the feature values comprise radial velocity and change rate thereof, navigation speed degree and change rate thereof, radar cross-section (RCS) size and change rate thereof, as well as signal to clutter ratio and change rate thereof; classifying each of the feature values into a plurality of intervals; structuring a knowledge base of the high frequency ground wave radar remote track initiation; calculating the confidence coefficient of the trace point relative to the track initiation according to the knowledge base; judging whether the track initiation is needed according to the accumulated total confidence coefficient and the change rate thereof, wherein if the total confidence coefficient and the change rate thereof exceed a preset threshold value, performing the track initiation. Besides, the invention further provides a high frequency ground wave radar remote track initiation device.
Owner:哈尔滨工大雷信科技有限公司
Real-time adaptive track initiation statistics method based on plot density
ActiveCN107479044ANo human intervention requiredSuppression of false tracksWave based measurement systemsSelf adaptiveSpatial domain
The invention relates to a real-time adaptive track initiation statistics method based on a plot density. Through counting the space plot density, one plot is for each initiation, a related spatial domain is demarcated adaptively, and the number of plots related to the plot in the spatial domain is counted. In the case of the track initiation, the average plot density of all plots used by the track is calculated, and according to the real-time statistics result and a preset threshold, the track initiation moment is determined, and false tracks can be effectively suppressed.
Owner:CNGC INST NO 206 OF CHINA ARMS IND GRP
Process control hierarchy analog steel rolling system
InactiveCN1674031AReduce wasteImprove operational safety factorAnalogue processes for specific applicationsHeating furnaceManufacturing line
The steel rolling simulating system as one single layer simulating system with process computer may be used in the comprehensive debugging, field cold load measurement and hot load measurement of the simulating application system. The steel rolling simulating system includes three parts: 1. plan simulator to simulate the steel rolling plan from the production managing computer; 2. steel drawing simulator to simulate the steel drawing message from the heating furnace to create tracking initiation pointer, to insert request initiation event and to prepare the automatic event sending of subsequent event; and 3. automatic event simulator to simulate various messages from automatic rolling base system to create simulating message and subsequent event. The automatic event simulator can simulate all the process relevant events in the production line.
Owner:SHANGHAI BAOSIGHT SOFTWARE CO LTD
Pulse Doppler radar clutter suppression method based on track clutter map
ActiveCN111398947ASuppress clutter tracksRadio wave reradiation/reflectionAlgorithmRadio frequency signal
The invention provides a fixed track clutter suppression method based on a track clutter map, and the method comprises the steps: enabling a receiver to receive a returned radio frequency signal, andobtaining a detection target and clutter point track information after preprocessing; processing the point track information based on a track initiation algorithm and a track association algorithm toobtain target and clutter track information; and comparing the track information with track similarity in corresponding clutter map cells in a pre-stored track clutter map, if the track information isa clutter track, cancelling display on the radar, and if the track information is a suspected target, uploading the track information to a radar display interface for display. According to the clutter suppression method, the tracks of clutters such as pedestrians, vehicles, large vehicle sidelobes or passenger planes with specific airlines can be effectively suppressed by 70%-80% through actual measurement verification.
Owner:成都汇蓉国科微系统技术有限公司
Multi-hypothesis multi-target track initiation method based on grid clustering
PendingCN112098992ASolve falseSolve the problem of low initial accuracy of multi-target trackCharacter and pattern recognitionRadio wave reradiation/reflectionHigh densityMultiple hypothesis
The invention provides a multi-hypothesis multi-target track initiation method based on grid clustering. The multi-hypothesis multi-target track initiation method comprises the steps of obtaining a trace point set and mapping the trace point set into a grid; determining boundary points of the current high-density grid; forming a trace point cluster based on boundary points of the high-density grid; performing clustering processing on each trace point cluster to generate a cluster; establishing an association hypothesis of a target and measurement in the cluster; and obtaining an optimal hypothesis according to the hypothesis probability obtained through calculation, calculating track scores, sorting the track scores from high to low, deleting low-score tracks through backtracking so as toconfirm track generation, and updating target state estimation of the tracks. According to the method, a plurality of target tracks can be initiated, the problem of multiple false tracks in a high-density clutter environment is solved, and engineering application under a high-density clutter condition is facilitated.
Owner:DALIAN MARITIME UNIVERSITY
Space target track interruption correlation method based on trace forecast
ActiveCN107643083AIncrease the number of effective tracking targetsImprove continuityNavigational calculation instrumentsDynamic equationRelative motion
The invention discloses a space target track interruption correlation method based on trace forecast, and belongs to the technical field of track correlation. A space target has the characteristics ofhigh density, low target relative movement speed, poor divisibility and the like, the problems that in a tracking process, targets are easily lost, and the same target is repeatedly subjected to track initiation and is given with a plurality of batch numbers are easily caused, in order to effectively improve continuity and stability of tracking on the space target and improve target tracking precision and effective tracking batch numbers, the speed and position of the space target are separately subjected to first-order least square curve fitting and second-order least square curve fitting toimprove the precision of a trace forecast initial value point, the position of the trace forecast initial value point is obtained by variable-order curve fitting, the target acceleration of the timeis estimated according to a spatial objective dynamic equation, the movement locus of the space target is forecasted through the estimated acceleration by a Euler extrapolation forecast method, and the problem of track interruption correlation is solved by the forecast result of the trace of the space target.
Owner:NAVAL AVIATION UNIV
Group target tracking track initiation method based on Bayesian principle
ActiveCN111983601AImprove utilizationImprove robustnessRadio wave reradiation/reflectionICT adaptationEngineeringTarget distribution
According to a group target tracking track initiation method based on a Bayesian principle, a likelihood ratio expression is described by introducing the number information of targets in a sub-group,so that the utilization of the feature information of the group target is increased, and the track initiation efficiency for dense group targets, especially under the condition of dense distribution,is improved. Meanwhile, the likelihood ratio expression adopts Poisson distribution to describe the intra-group target distribution condition probability density under the condition that the flight path is true, the problem that the residual error between an extrapolation value and an actual measurement value is too large due to the jumping phenomenon of equivalent measurement in a traditional flight path starting method is avoided, and the robustness of the algorithm is improved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Multi-base station single frequency network passive cooperation positioning method based on MML-PMHT
ActiveCN107219498ASolve association problemsReduce the amount of associationPosition fixationRadio wave reradiation/reflectionHypothesisMathematical model
The invention discloses a multi-base station single frequency network passive cooperation positioning method based on MML-PMHT. The method comprises steps that firstly, a mathematics model of a multi-base station passive cooperation positioning system is established; secondly, under an unknown target number scene, the target number is determined through a hypothesis method, a logarithm likelihood ratio function is constructed, and maximization of the likelihood function is carried out to solve the target number; thirdly, a super target concept is utilized to solve a three-dimensional data association problem, the logarithm likelihood ratio function of an MML-PMHT algorithm is optimized through utilizing a Quasi-Monte Carlo search algorithm, so a target solution problem is converted into an optimization problem of the likelihood function; and lastly, track maintenance is realized through a sliding window method. The method is advantaged in that a multi-base station cofrequency network three-dimensional data association problem can be rapidly and effectively solved, and a track initiation and maintenance problem of weak targets under the complex environment can be realized.
Owner:河北凯通信息技术服务有限公司
Low speed formation target tracking method based on formation pattern
ActiveCN105676216AAvoid data redundancyAvoiding Misassociated SituationsRadio wave reradiation/reflectionGeomorphologyLow speed
The invention discloses a low speed formation target tracking method based on formation pattern, and the method mainly solves track cross and data redundancy problems which easily present in measurement and track association process in prior art. The technical scheme comprises: formation partition and formation association are separately performed on targets, and the track initiation of the formation targets is completed; after the above, the distance and angle from each target in the formation to a formation center form a shape description matrix of a formation to describe the formation shape; the measurement of the each target in the formation is allocated according to the formation shape description matrix, the measurement corresponding to the track in the formation is obtained, smooth filtering is performed on the measurement to obtain an update state of the measurement; after the above, the formation shape is updated based on the formation pattern description according to the update state, and the tracking of the formation target is completed. According to the invention, the accuracy and processing efficiency of the frame target tracking are improved, and the method can be used for radar data processing.
Owner:XIDIAN UNIV
Track start discrimination method based on attribute clustering and space-time constraint
ActiveCN113177097AIncrease speedImprove accuracyRelational databasesGeographical information databasesTime informationElectronic information
The invention discloses a track start discrimination method based on attribute clustering and space-time constraint, and the method comprises the steps: carrying out the clustering of all target electronic information through employing a K-Means dynamic clustering method according to the attribute information value similarity of the target electronic information; and according to a space-time constraint relationship, performing track association on each type of target electronic information to obtain a plurality of tracks. The method is suitable for track start judgment of space-based electronic signals; when track start discrimination is carried out, space-time information and attribute information of electronic information are used at the same time, hierarchical clustering is carried out on the attribute information firstly, then intra-class association is carried out according to space-time constraint conditions, false alarm points are eliminated, and meanwhile the rate and accuracy of track start discrimination are increased.
Owner:江西航天鄱湖云科技有限公司
Track tracking optimization method under radar far-near alternative ranging mode
ActiveCN110673134AImprove continuityImprove filter smoothing effectInternal combustion piston enginesRadio wave reradiation/reflectionNonlinear filterRadar
Owner:NANJING DESAY SV AUTOMOTIVE CO LTD
Multi-constraint condition track initiation detection method for large-view-field photoelectric imaging tracking system
PendingCN109633678AShow validityShow robustnessElectromagnetic wave reradiationImage trackingTracking system
The invention belongs to the technical field of analysis of echo signals using target characteristics and motion characteristics, and discloses a multi-constraint condition track initiation detectionmethod for a large-view-field photoelectric imaging tracking system. The method comprises the following steps that firstly, a constraint condition 1 with track consistency judgment and direction judgment is utilized to enhance rapid initiation of a track of a threat target; and then, the mutual cooperation between a constraint condition 2 with course variance judgment and a constraint condition 3with track reliability judgment is utilized to finish the track initiation of an interrupted point track target, and in the large-field-field photoelectric imaging tracking system, the rapid initiation of the track of the thread target in the whole airspace is achieved under a dense cluster environment. According to the method, the rapid initiation of the large-threat probability target and the interrupted point track target track is achieved under the large-view-field photoelectric imaging tracking system, so that a new idea is provided for accurate track initiation with fast targets under the dense cluster environment in the large-view-field photoelectric imaging tracking system.
Owner:ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
Filter initialization method under condition of unequal measurement time intervals
ActiveCN106383345ARelatively small errorWave based measurement systemsSignal-to-noise ratio (imaging)Filter algorithm
The invention discloses a filter initialization method under the condition of unequal measurement time intervals, and belongs to the field of radar data processing. A target is tracked by use of a Kalman filtering algorithm. A filter is initialized first, including filtering state initialization and filtering covariance matrix initialization. A filter initialization method based on three-time measurement difference has an obvious defect, namely, a filter cannot be initialized directly under the condition of unequal time intervals of measurement data, and the method can hardly adapt to interruption or loss of measurement data caused by problems like low signal-to-noise ratio and track initiation uncertainty. The filter initialization method under the condition of unequal measurement time intervals put forward by the invention intends to solve the problem, and is of vital significance to effectively enhancing the adaptability of the Kalman tracking filtering algorithm. The experimental simulation result of the embodiment shows that the method of the invention can effectively overcome the application limitations of the filter initialization method based on three-time measurement difference. Therefore, the filter initialization method under the condition of unequal measurement time intervals disclosed by the invention has high engineering application value and a broad promotion prospect.
Owner:NAVAL AVIATION UNIV
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