27 results about "Probe target" patented technology

The invention relates to the technical field of intelligent monitoring equipment, in particular to a radar point cloud target detection system and method based on multi-modal space-time fusion. Comprising the following steps: at least two radar transceivers synchronously collect echo signals of a target at different visual angles, and establish a three-dimensional coordinate system; based on the three-dimensional coordinate system of the target points, the target points of each time slice are clustered, a coordinate set of point cloud clustering is obtained, and whether the point cloud gravity center of each detection target is displaced or not is judged; if the detected target is displaced, capturing a space trajectory of a target point based on the barycentric coordinates, and performing gait analysis on the detected target; and if the detection target does not displace, judging the body posture of the detection target. The method has the advantage of low cost, reliable radar point cloud can be realized, the defects that the traditional point cloud needs multi-antenna MIMO and the cost is high are overcome, body point cloud modeling in the walking process is realized, meanwhile, posture body point cloud and vital sign data are jointly verified, and the reliability is enhanced.

The invention belongs to the technical field of target clustering, and particularly relates to a target clustering method based on multi-type photoelectric detection results of an unmanned ship, which can cluster detection data according to a clustering radius and a clustering number, can realize manual correction, and can perform clustering calculation on corrected data again, thereby improving the accuracy of a clustering center. In order to realize post-processing on multi-type target data of photoelectric detection and reduce the influence of noise points on a clustering center, after the detection data is classified, the detection data is clustered by adopting a DBSCAN method according to the clustering radius and the clustering number, so that post-processing clustering can be carried out on multi-type targets of photoelectric detection, and the clustering accuracy is improved. Moreover, a mode that a detection picture corresponds to a detection target is designed, manual correction can be realized, and the corrected data is subjected to clustering calculation again, so that the accuracy of the clustering center is improved.

The application relates to a motion information prediction method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring first fusion data; determining a detected target based on the first fusion data; adjusting the credibility of the detected target according to whether the detected target can be detected by a sensor; determining a to-be-detected target in the detected target according to the adjusted credibility; performing matching processing based on the prior prediction behavior of a reference vehicle around the to-be-detected target and the posterior behavior of the reference vehicle within a set time window; determining the detection information of the to-be-detected target according to the matching result; and predicting the behavior of the to-be-detected target according to the detection information of the to-be-detected target to obtain the predicted motion information of the to-be-detected target. The application can improve the accuracy of predicting the motion information of the detected target.

The present application relates to the field of radar, the present application relates to a kind of radar track pairing method and system under the interference environment, the method in it includes: obtaining the multiple detection tracks of radar output and the real track of each real battle situation target, and the real track corresponding to each detection track is determined respectively to obtain pairing result, wherein determining the real track corresponding to certain detection track includes: selecting continuous multiple track points from detection track as to-be-matched track point;The track point in the real track of real battle situation target is interpolated to obtain the to-be-matched track point corresponding to each to-be-matched track point;The positioning error between each real battle situation target's to-be-matched track point and corresponding to-be-matched track point is calculated respectively;Real track corresponding to detection track and detection target are identified.The method of the present application can effectively solve the technical problems that time asynchronization exists when radar track is paired and pairing is prone to error in complex environment.

This application discloses a network probing method, a QKD node, and a network probing system, belonging to the field of quantum technology. In this embodiment, a first QKD node in a QKDN receives a first probe request message. The first probe request message carries the identifiers of a second QKD node and a third QKD node. The second QKD node is a key distribution source node, and the third QKD node is a key distribution destination node. The first probe request message also carries a probe target, which indicates the information to be probed between the second and third QKD nodes. The first QKD node determines the probe result based on the probe target and transmits the probe result to the second QKD node. In this embodiment, the key distribution source node can probe a specific target in the key distribution process through the probe request message, facilitating maintenance personnel to perform maintenance on the key distribution process based on the probe results.

The invention discloses a beam measurement wire scanning probe device and method, and relates to the technical field of beam measurement wire scanning, the beam measurement wire scanning probe device comprises a motor platform, a wire scanning motion support and a wire target frame body, the wire scanning motion support is arranged above the motor platform, and the wire target frame body is arranged above the motor platform through a fixing frame; the outer wall of the wire target frame body is provided with a sliding plate which is matched with the outer wall of the wire scanning motion support in a sliding mode, a double-rotor linear motor is arranged above the motor platform, the output end of the double-rotor linear motor is connected with the sliding plate, and corrugated pipes connected with the sliding plate are installed on the two sides of the wire target frame body. The device is provided with a wire scanning probe target moving cavity, the two sides of a beam channel are provided with double corrugated pipes and double wire scanning moving supports, the ultrahigh vacuum requirement in the cavity is met, meanwhile, the design requirements that the stroke of a wire target is larger than or equal to 100 mm and the vibration amplitude of the wire target is smaller than or equal to 20 micrometers can be met, and more diversified moving modes such as high-speed and low-speed regulation and control are achieved.

This invention belongs to the field of laser detection technology and proposes a target extraction method based on the cat's eye effect. By controlling the laser switch, one frame of the image is in the laser-on state and the other is in the laser-off state. Using three adjacent frames, the frame difference between two adjacent frames is calculated and superimposed. The superposition of the two frame difference results makes the pixel value of the detected target position much larger than that of other positions, thereby extracting the corresponding threshold. In addition, the superposition of the two frame difference results can eliminate most interference and moving targets, improving the accuracy of target detection. The current input frame and the two frames before it are used as the threshold extraction scheme for the current frame. After the current frame is buffered, the corresponding threshold is obtained as the discrimination condition for its output. The overall implementation is delayed by one frame of image time, with small system latency. Moreover, this method is simple to design, easy to implement, and has wide applicability.

This invention discloses a distributed 3D extended target tracking method based on feature selection, comprising the following steps: acquiring the raw measurements of each sensor at time k; preprocessing the raw measurements to obtain preprocessed raw measurements; inputting the preprocessed raw measurements into the GIW-PHD filtering algorithm to obtain the estimated state information of the target detected by each sensor; preprocessing the estimated state information of the detected target to obtain the target state of each sensor; and selecting the target state for feature extraction and fusion to obtain the target state information at time k. This invention can shorten the data filtering operation time while performing feature selection and fusion of the target state of the sensors, and improve the estimation accuracy of the position information and 3D extended information of the 3D extended target by using feature splicing and fusion.

The application provides a low-altitude weak target detection method and device based on a synthetic wavelength, which can be applied to the field of target detection. The method comprises: imaging echo data of a to-be-detected region without any to-be-detected target to obtain a first image; imaging echo data of a to-be-detected region with a to-be-detected target to obtain a second image; performing an interference operation on the first image and the second image to obtain a phase interference graph spectrum; cropping the phase interference graph spectrum to obtain a first wavelength phase interference graph and a second wavelength phase interference graph; generating a differential synthetic wavelength interference graph and an additive synthetic wavelength interference graph according to the first wavelength phase interference graph and the second wavelength phase interference graph; and unwrapping the additive synthetic wavelength interference graph by using the differential synthetic wavelength interference graph, and detecting the to-be-detected target based on the unwrapped additive synthetic wavelength interference graph. In this way, the target and clutter in the low-altitude environment are effectively identified, and the detection accuracy is improved.

The invention discloses a radar sea-surface target classification method based on channel attention and a dynamic rectification function, and the method comprises the steps: 1, carrying out the classification of a radar sea-surface target based on the classification scene and classification demands of the radar sea-surface target, and reference to the completeness and balance of data set construction; based on a self-constructed or existing radar, samples are extracted from the sea exploration target classification data set, and a training data set and a test data set are constructed; step 2, using a radar sea surface target classification network based on channel attention and a dynamic rectification function to train the training data set; 3, testing the classification network and the network weight coefficient obtained by training, and recording a recall rate and an average precision mean value; 4, training iteration is carried out until the maximum number of times is reached; and step 5, according to the recorded recall rate and average precision mean value of the classifier test, obtaining a classifier with the optimal performance index in all iterations for sea radar target classification. The weak target classification capability of the classification method under the complex sea surface background is enhanced.

The invention relates to the technical field of photoelectric tracking, in particular to a high-energy laser emission aiming tracking system and method.A coarse tracking assembly is arranged to be an infrared light detection assembly and can detect a target all day long; the infrared light detection assembly is in communication connection with the two-axis servo turntable and can send a detected target position to the two-axis servo turntable so as to control the two-axis servo turntable to rotate to track and position a target; the laser illumination assembly is only used for supplementing light to the target when the fine tracking assembly detects and tracks the target, so that the fine tracking assembly can detect the target all day long and improve the imaging definition of the target. The laser illumination assembly is specially used for supplementing light to a target in the fine tracking process, the divergence angle of the laser illumination assembly is reduced, most of energy is irradiated to a small-view-field target area needed by fine tracking, background astigmatism is reduced, the signal-to-noise ratio of fine tracking imaging is increased, the tracking precision is improved, meanwhile, light is prevented from being lost in the background, and the tracking precision is improved. And energy waste is caused.

The invention discloses a campylobacter jejuni liquid-phase probe targeted capturing and library building method and a kit thereof, and belongs to the technical field of germ detection. Specific probe enrichment, magnetic bead purification and high-throughput sequencing are combined, and the problems that in the prior art, low-load detection is difficult, information is incomplete, and operation is tedious are solved. Aiming at the characteristics of wide food-borne transmission, multiple low-load samples and strong complex matrix interference of campylobacter jejuni, low-load accurate detection, whole-genome information analysis and high-throughput standardized operation are realized through a liquid-phase probe targeted capture technology; the method is suitable for large-scale sample detection in the fields of food safety detection, clinical diagnosis, public health research and the like.

This system accurately evaluates, using a simple configuration, whether bumper repairs have prevented the vehicle from properly detecting the target object. [Solution] The evaluation device 100 includes an acquisition unit 102a that acquires near-field reflected power, which is the radio wave intensity when radio waves emitted from the radar device are reflected by the bumpers 12 and 14 of a vehicle 10 equipped with a radar device, both before and after repair; a comparison unit 102b that compares the near-field reflected power before and after repair and determines whether there is a difference of more than a predetermined value; and a determination unit 102c that, based on the comparison result, determines that if there is a difference of more than a predetermined value between the near-field reflected power before and after repair, the repair of the bumpers 12 and 14 is unsuitable and the radar device cannot properly detect the target.

The application relates to a target amplitude flicker loss scene-oriented ultra-wideband radar range image enhancement method and relates to the technical field of radar signal processing.The method comprises the following steps: detecting a detection target in a detection scene by using a step frequency ultra-wideband radar, and acquiring frequency domain echo data corresponding to the detection target; based on an iterative unfolding reconstruction network, an imaging target function corresponding to the frequency domain echo data is solved iteratively, and a coarse reconstruction range image corresponding to the detection target is acquired; finally, the coarse reconstruction range image is compensated and enhanced by using an enhancement network, and an enhanced range image corresponding to the detection target is generated; the enhancement network is used for compensating the track cavity of the detection target, and suppressing the sidelobe uplift of the detection target and the residual static clutter of the detection scene under the condition that the amplitude of the detection target flickers and sampling is lost.The application can realize high-quality high-resolution range image reconstruction and enhancement, and provide a stable and high-fidelity range image input for subsequent imaging and positioning and the like.

The application belongs to the technical field of detection resource planning, and specifically discloses an interactive situation detection resource sensing and planning method and system, which comprises the following steps: collecting and organizing the detection resources inside and outside the cluster in real time; acquiring the situation information of a detection task and sensing the target state information of a detection target in the detection task in real time according to the situation information; calculating and determining the various relationship information of the detection node and the detection target according to the node state information and the target state information; combining the detection task, the node state information, the target state information and the relationship information with a user input instruction and a first cooperative request as input information, and inputting the input information into a multimodal large model for task understanding; and calling multiple different professional models in parallel to generate a planning scheme according to the task type of the detection task by using the multimodal large model, so that the flexibility and efficiency of the execution of the detection task can be improved.

This invention discloses a novel organic room-temperature phosphorescent probe targeting fibroblast activating protein (FAP) and its applications, belonging to the field of molecular imaging. This invention obtains an organic room-temperature phosphorescent probe targeting FAP by coupling a target FAP inhibitor with a polymer shell encapsulating a novel near-infrared organic room-temperature phosphorescent material, TPE-4BT. This probe can be used for liver cancer imaging or for preparing reagents or drugs for liver cancer imaging. The organic room-temperature phosphorescent probe of this invention can specifically bind to target fibroblast cells, and can even be localized to the cell nucleus. In vivo observation shows that the probe is significantly enriched at the tumor site without background interference. The organic room-temperature phosphorescent probe of this invention can provide accurate preoperative localization and precise intraoperative delineation of tumor lesion boundaries, providing multi-dimensional information for precision tumor diagnosis and treatment, helping to solve clinical visualization problems in liver cancer, and advancing translational applications in oncology.

The invention discloses an unmanned aerial vehicle automatic identification and tracking system and method, and belongs to the technical field of photoelectric automatic zooming, and the method comprises the steps: employing a detection module to detect a target object, and obtaining the azimuth angle, pitch angle and distance of the target object; the azimuth angle and the pitch angle of the recognition module are adjusted through the rotary table, so that the azimuth angle and the pitch angle of the recognition module and the target object are within a set deviation range; automatic zooming and automatic focusing are carried out on the coarse television of the identification module, so that the target object is located in the field of view of the coarse television; performing coarse tracking on the target object; and performing fine tracking on the target object. According to the automatic tracking identification method for the unmanned aerial vehicle, preliminary detection of the target object, coarse tracking of the target object and fine tracking of the target object are connected in series, all the steps are automatically processed, the operation process and control time of automatic tracking of the target object are greatly simplified, manual intervention is avoided, and the identification efficiency and accuracy of the target object are greatly improved.

The embodiment of the invention discloses an air coupled antenna coupling distance automatic compensation device and method based on linear variable delay. The method comprises the following steps: acquiring an original detection signal transmitted in a receiving and transmitting link of a target antenna; coupling distance data between the target antenna and the detection target is collected through a distance sensing device; the coupling distance data are imported into a linear variable delay generation module, and a delay signal linearly associated with the change of the coupling distance is generated; the delay signal is injected into the delay adjusting unit, time sequence calibration processing is carried out on the original detection signal, dynamic coupling fusion is carried out on the original detection signal and the delay signal, and a stable detection signal after delay compensation is output; and constructing a detection signal feature space based on the stable detection signal, performing feature extraction, association verification and attribute analysis of a detection target, and outputting a non-contact detection result. Therefore, automatic compensation of coupling distance change and accurate detection of a detection target can be realized, and the stability of a detection signal and the reliability of a detection result are improved.

This invention discloses a TaqMan real-time fluorescent PCR detection primer and probe set, kit, and detection method for Cuscuta pentaphyllum. The primer and probe set includes: an upstream primer C. pan F, whose nucleotide sequence is shown in SEQ ID NO.1; a downstream primer C. pan R, whose nucleotide sequence is shown in SEQ ID NO.2; and a TaqMan probe C. pan P, whose nucleotide sequence is shown in SEQ ID NO.3. The primers and probe target specific fragments of the rbcL gene sequence of Cuscuta pentaphyllum, achieving specific recognition of Cuscuta pentaphyllum through sequence complementarity matching. This avoids false positive results caused by cross-reactions with closely related species and host plants at the molecular targeting level, effectively solving the problem of difficulty in distinguishing closely related species in traditional morphological identification. Compared with traditional morphological identification and conventional PCR, this invention also features high detection efficiency, short processing time, simple operation, and wide applicability. It is suitable for precise identification in professional laboratories and can also meet the practical applications in grassroots quarantine and field monitoring scenarios.

The application relates to a radiation calibration method and device of a spaceborne fire point sensor. The method comprises the following steps: based on actual latitude and longitude information of a plurality of known targets, running orbit information of a satellite and an installation matrix of the fire point sensor on the satellite, generating a calibration task of each known target in sequence; acquiring medium-wave radiance and long-wave radiance of each known target; wherein the medium-wave radiance and the long-wave radiance of each known target are obtained by a detector of the fire point sensor based on corresponding calibration tasks and corresponding known targets; based on the medium-wave radiance and the long-wave radiance, calculating medium-wave brightness temperature and long-wave brightness temperature of each known target; based on actual temperatures, medium-wave brightness temperatures and long-wave brightness temperatures of any three known targets, calculating an actual calibration coefficient of the detector; and based on the actual calibration coefficient, calculating a temperature of a to-be-detected target. The method can accurately calculate the temperature of the to-be-detected target and reduce the false alarm rate.

The invention provides a target detection method, device and equipment, a medium and a product, and relates to the technical field of communication. The method comprises the following steps: generating a corresponding precoding vector according to a direct path interference direction of a first base station for target detection; loading the signals to digital baseband signals generated according to space-time block coding, respectively modulating to generate corresponding radio-frequency emission signals in the same time-frequency resource, and emitting the radio-frequency emission signals; and according to space-time block decoding, carrying out echo signal separation on the superposed echo signals received by the second base station in the first base stations, respectively obtaining a first target three-dimensional coordinate of the detection target corresponding to each first base station, carrying out fusion positioning, and obtaining a three-dimensional coordinate result of the detection target. According to the embodiment of the invention, the precoding vector is generated through the direct path interference direction of the base station, the problem that the direct path interference between the base stations exceeds the dynamic range of the analog-to-digital converter is solved, the adjacent station interference is reduced through space-time block coding and decoding, and the spectrum resource utilization rate and the target positioning precision are improved.

This invention, entitled "A Primer-Probe Combination for Simultaneous Detection of AMB, VZV, and HSV-1, and its Detection Method, Application, and Product," belongs to the field of molecular biology detection technology. The technical problem it aims to solve is that existing ocular infection detection technologies cannot simultaneously detect AMB, VZV, and HSV-1 in a single tube, or only cover the virus and miss AMB, or require multiple tubes, have unclear identification, insufficient sensitivity, and are difficult to adapt to small ocular samples, failing to meet the needs of rapid and accurate clinical diagnosis. The key technical solution is to provide specific primers and probes targeting the 18S rRNA gene of AMB, the ORF62 gene of VZV, and the UL30 gene of HSV-1, combined with internal quality control primers and probes, using four different fluorescent labels to establish a single-tube multiplex real-time fluorescent PCR detection method, and preparing a matching kit to achieve simultaneous detection and identification of the three pathogens. This invention features high sensitivity, specificity, and strong anti-interference ability.

An autonomous probing system includes a computer, a probe assembly, a PLC, and an optical sensor. The optical sensor captures image data of a probing environment. The probe assembly includes a moveable probe portion and a sensor. The probe portion is moveable between a first and second position. The sensor has a first sensor value that is indicative of the first position. The computer receives image data from the optical sensor and detects a vehicle positioned within the probing environment. The computer then determines one or more target areas within the vehicle and an X coordinate position and a Y coordinate position of one or more probe target points within each of the target areas. Based on the first sensor value and the X and Y coordinate positions, the computer determines a second sensor value, which is indicative of the second position and transmits the value to the PLC.

This invention relates to the field of analytical detection technology, and discloses a high-throughput rapid detection platform for contaminants in food, its construction method, and its applications. The high-throughput rapid detection platform is constructed by immobilizing universally applicable biorecognition sensing probes targeting contaminants on a 96-well plate to achieve high-throughput rapid detection. The biorecognition sensing probes include a Pt NP-modified signal transduction probe (Bond) and an arm-containing aptamer that specifically recognizes the contaminants. This invention constructs an aptamer sensor by modifying Pt NPs onto a triple-helix molecular switch signal transduction probe. Simultaneously, utilizing its peroxidase mimic activity and fluorescence quenching capability, the activity of Pt NPs is modulated via the triple-helix molecular switch, developing a universal dual-mode aptamer sensing platform. This platform retains the inherent advantages of each signal mode while supporting real-time cross-validation, helping to reduce systematic errors and suppress external interference, effectively reducing false positive and false negative rates.

This invention discloses a method and system for testing radio detection performance based on target equivalence coordination, relating to the field of radio detection technology. The method includes acquiring information about the radio detection device under test and acquiring preset detection target information based on application scenario information. This invention achieves accurate determination of point / area targets through target classification; it suppresses outliers and calculates accurately by matching the median absolute deviation with a robust weighting function based on target type; it achieves accurate matching of the detection distribution with the echo characteristics of the real target by adapting the chi-square detection distribution model and weighted maximum likelihood estimation according to target type; and it achieves high-precision equivalent replication of the real target's RCS by matching area targets with metal triangular reflectors and point targets with metal spheres, and by using signal-to-noise ratio calculation to solve for the equivalent size. This ensures the authenticity and accuracy of radio detection performance testing.

The embodiment of the invention relates to the technical field of pipeline detection, and provides bimetal composite pipe defect detection equipment and method, the equipment comprises a plurality of multidirectional probes, the multidirectional probes are arranged in a positive and negative staggered manner to form an annular layout, and the multidirectional probes are used for detecting a magnetic flux leakage signal of a target bimetal composite pipe; the processor is used for receiving the magnetic flux leakage signal and performing denoising processing on the magnetic flux leakage signal by using wavelet transform to obtain a denoised magnetic flux leakage signal; performing feature extraction on the de-noised magnetic flux leakage signal to obtain a time domain feature, a frequency domain feature and a time-frequency domain feature; and inputting the time domain feature, the frequency domain feature and the time frequency domain feature into a pre-trained defect detection model to obtain the defect type and defect degree of the target bimetal composite pipe. According to the embodiment of the invention, the resolution of a magnetic flux leakage detection signal can be improved, and the defect detection precision is improved.

A detection method, a control method and devices can be applied to the fields of automatic driving, intelligent driving or surveying and mapping and the like. The objective of the invention is to improve timeliness of target motion state detection and reduce response time for target motion. The method comprises the following steps: acquiring an echo signal obtained by detecting a first target in a first time unit, determining the relationship between the speed and time of the first target according to the echo signal, and sending first information determined based on the corresponding relationship between the speed and time to a control device, the control device is used for making an accurate and timely response according to the movement condition of the first target. Wherein the first information comprises at least one of the corresponding relation between the speed and the time of the first target, the acceleration information of the first target or the motion state information of the first target. Wherein the acceleration information of the first target is determined according to the corresponding relation between the speed and the time, and the motion state information of the first target is determined according to the acceleration information of the first target.