38 results about "Radio detection" patented technology

A method and an apparatus for automatically recognizing an unmanned aerial vehicle, an electronic device, and a computer medium are provided. A specific implementation of the method includes: in response to determining that a radio detection device detects a radio signal, preprocessing the radio signal to generate preprocessed radio spectrum data; extracting radio signal features in the preprocessed radio spectrum data; inputting the radio signal features into a pre-trained unmanned aerial vehicle signal recognition model to obtain an unmanned aerial vehicle signal recognition result; in response to determining that the unmanned aerial vehicle signal recognition result represents an unmanned aerial vehicle signal, controlling a high-definition camera apparatus associated with the radio detection device to photograph an environmental video of a surrounding environment at a first time in real time; and generating unmanned aerial vehicle detection information corresponding to the first time according to a three-dimensional feature information group.

The invention discloses an offshore small target radar detection method and system, and relates to the technical field of radio detection. The method comprises the following steps: acquiring radar echo data, a visible light image, an infrared image, an AIS signal and navigation attitude data in real time; performing sea clutter suppression and pre-filtering on the radar echo data, and correcting target plots in combination with a historical radar plot set to obtain a radar single-source target track set; performing target detection on the visible light image and the infrared image to obtain an optical target detection set and an infrared target detection set; the radar single-source target track set, the optical target detection set, the infrared target detection set, the AIS signals and the navigation attitude data are associated and fused, and finally deception feature recognition and consistency verification are performed to obtain an updated fused target track set; according to the method, man-made confrontation and cheating behaviors on the sea can be accurately identified, and reliable support is provided for safety monitoring on the sea, maritime affair supervision and emergency response.

The invention relates to the technical field of unmanned aerial vehicle radio detection, in particular to an unmanned aerial vehicle detection and judgment method based on cooperation of an air-ground system and radio detection, and the method comprises the steps: finding a suspected target through scanning of a multi-frequency-band radar, triggering an infrared thermal imager carried by an aerial unmanned aerial vehicle to approach an ultra-wide-frequency-band spectrum sensor for verification; accurate positioning is realized by combining ground photoelectric equipment multi-view triangulation positioning and a signal arrival time difference algorithm, a command and control center calculates threat levels through a multi-source data fusion engine, and navigation decoy of dynamically adjusting intensity is adopted for targets smaller than or equal to two levels. Hard killing of ground laser locking rotor center and air electromagnetic pulse synchronous coverage is executed on a target of more than or equal to three levels, the equipment state is synchronized in real time through an optical fiber link, high-energy-consumption equipment is intelligently closed after threat is relieved, a platform starting strategy is optimized, a detection closed loop of'three-dimensional perception-graded treatment-intelligent energy saving 'is constructed, and the intelligent energy saving effect is achieved. And an efficient and accurate low-altitude safety protection scheme is provided for a sensitive area.

Systems and techniques are provided for performing RADAR sensing based on external sensor feedback. An example method includes receiving position data associated with at least one object, wherein the position data is based on sensor data obtained by at least one sensor; identifying, based on the position data, at least one subspace from a field of view of a radar sensor, and collecting radar sensing data from the at least one subspace, wherein the radar sensing data corresponds to the at least one object.

The invention provides a total electron amount calculation and correction method for space-based detection ionosphere data. The method comprises the following steps: converting an earth-fixed coordinate system; calculating collision parameters; sorting collision parameters and phase arrays; performing phase calibration; and obscuration correction of the total electron amount. The method has the beneficial effects that according to the forward relation between the total electron content of the ionosphere and the additional time delay of radio wave propagation caused by the ionosphere, the accurate total electron content is obtained from the satellite-ground radio detection ionosphere data by using a calculation and correction method; the method is of great significance in the aspects of satellite positioning navigation radio wave correction, space environment monitoring and the like.

The invention provides an unmanned aerial vehicle detection method, system and product based on radio fusion vision. The method comprises the following steps: respectively extracting radio characteristics of a target radio signal and image characteristics of a target visual image; carrying out feature fusion on the radio features and the image features to obtain a fusion feature vector; inputting the fusion feature vector into a trained unmanned aerial vehicle detection model for target detection, and obtaining a target detection frame and unmanned aerial vehicle category information; and inputting the target detection frame and the unmanned aerial vehicle category information into a dynamic weight distribution model for weighted correction to obtain a final unmanned aerial vehicle detection result. Compared with a traditional method, the method has the advantages that through radio and visual feature fusion, complex electromagnetic interference and severe environment influences such as strong light, backlight and haze can be resisted, the signal confusion problem of single radio detection is avoided, the imaging limitation of single visual detection is made up, the multi-scene detection requirement can be effectively met, and the detection precision and reliability are improved.

The invention discloses a multi-receiving-station clock synchronization method, system and device, a medium and equipment, and relates to the technical field of radio detection. The method comprises the following steps: controlling a civil radiation source to synchronously transmit target signals to a plurality of receiving stations; each receiving station carries out frame structure analysis on the received target signal and determines a frame header starting moment; calculating the clock skew of each receiving station based on the signal propagation time delay between each receiving station and the civil radiation source and the corresponding frame header starting time; and correcting a local clock of each receiving station by using the clock skew so as to eliminate a time difference of arrival (TDOA) among the multiple receiving stations. According to the method, the clock skew between the receiving stations is accurately calibrated, the precision of multi-station cooperative positioning is effectively improved, and the method is particularly suitable for a high-precision radio detection scene in a complex environment.

The invention belongs to but not limited to the technical field of radio detection, and particularly relates to a three-dimensional rotating baseline direction finding method, system, equipment, medium and terminal, the system is composed of three antennas which are respectively marked as an antenna A, an antenna B and an antenna C. The antenna A and the antenna B form a linear array which is connected through a cross rod, the distance is adjustable, the maximum is X m, and the midpoint of the A and B linear arrays is the position of a rotating shaft; a vertical rod is arranged at the center of the AB along a rotating shaft, the length of the vertical rod is adjustable, the longest length is Y meters, and the antenna C is located at the upper end of the vertical rod. During working, a base line where the antenna AB is located is driven by the rotating mechanism or the rotating platform to rotate anticlockwise, and the antenna C is located on the rotating shaft and does not rotate; the three antennas are respectively connected to the three receiving channels and synchronously start to collect data during working to form a base line AB, a base line AC and a base line BC, and phase differences of the base line AC, the base line BC and the base line AC are measured.

The invention discloses an integrated low-slow-small unmanned aerial vehicle passive detection system and a working method thereof, and the system combines conventional radio detection and external radiation source detection technologies, and is composed of a broadband antenna, a receiver and a signal processor. The system can monitor the low, slow and small unmanned aerial vehicle in real time, and realizes the functions of direction finding, positioning, monitoring and the like of the unmanned aerial vehicle and the unmanned aerial vehicle pilot. The system fuses signal information acquired by radio detection and external radiation source detection technologies to form more accurate and more comprehensive unmanned aerial vehicle target information. And the target information of the unmanned aerial vehicle is displayed in real time through the display control equipment. Radio detection positioning and passive radar detection are combined, advantages are complementary, the false alarm rate is reduced, and reliability and accuracy are improved; the method is integrally realized, a hardware system is shared, software is used for parallel processing, the cost is reduced, the flexibility is improved, and the method is suitable for low-slow small unmanned aerial vehicle detection under multiple scenes and tasks.

The invention provides a low-frequency radio atom antenna and a low-frequency radio detection method. The low-frequency radio atom antenna comprises a detection light optical fiber, a detection light lens group, a coupling light lens group, a coupling light optical fiber, an atom gas chamber, a parallel electrode plate, a coaxial cable, a passive antenna, a spectroscope and a photoelectric detector. Wherein the coupling light lens group is used for coupling light beam shrinkage, the detection light lens group is used for detecting light beam shrinkage, and the passive antenna is used for feeding in a low-frequency signal, so that measurement errors caused by access of an active electronic device can be reduced; the built-in electric field is generated through induction of high-power-density coupling light, electric field signals corresponding to radio to be detected can be amplified through the stark effect of the built-in electric field, and the low-frequency signal detection sensitivity is improved.

The present application relates to a kind of radar and radio system performance prediction and compensation method, belong to multi-physical field modeling, radar and radio signal processing and intelligent algorithm application technical field, the method includes feature extraction, feature fusion, performance prediction, model construction, minimization loss function training and power adjustment step, by the original signal of equipment and multidimensional meteorology, electromagnetic parameter are jointly input into neural network, by multi-branch feature extraction and cross-modal attention fusion structure, the performance attenuation of system under current environment and feasible compensation coefficient are output;The method is a kind of performance prediction and compensation method based on meteorology-electromagnetic-acoustic multi-physical field coupling framework and neural network, realizes the effective evaluation of the comprehensive influence of complex composite environment to radar and radio detection system performance.

A system for longitudinal acceleration planning is disclosed. The system includes a plurality of sensors including at least one of a light detection and ranging (LiDAR) sensor or a radio detection and ranging (RADAR) sensor, at least one memory configured to store instructions, and at least one processor configured to execute the stored instructions to: (i) receive sensor data, from the plurality of sensors, representing respective acceleration and location coordinates of a plurality of vehicles travelling in a direction of travel of a vehicle associated with the system; (ii) based upon the received sensor data, determine a feed-forward parameter corresponding to a traffic wave representing the respective acceleration and location coordinates of the plurality of vehicles; and (iii) based upon the determined feed-forward parameter, determine and apply a required acceleration of the vehicle to maintain a distance and a pace with the plurality of vehicles.

Detecting position information related to a face, and more particularly to an eyeball in a face, using a detection and ranging system, such as a Radio Detection And Ranging (“RADAR”) system, or a Light Detection And Ranging (“LIDAR”) system. The position information may include a location of the eyeball, translational motion information related to the eyeball (e.g., displacement, velocity, acceleration, jerk, etc.), rotational motion information related to the eyeball (e.g., rotational displacement, rotational velocity, rotational acceleration, etc.) as the eyeball rotates within its socket.

The invention belongs to the field of radio detection, particularly relates to a phased array incoherent scatter radar background noise calculation method and system, and aims to solve the problem of background noise calculation in phased array incoherent scatter radar detection. The method comprises the following steps: calculating the sky noise temperature of a corresponding detection point according to any detection beam selected in a radar grating lobe-free detection area; a space included angle between the sun position and the detection point position is obtained, and the sun noise temperature of the detection point is determined by combining radar system parameters; determining the atmospheric noise temperature of the detection point according to the elevation angle of any detection wave beam and the detection environment temperature; and comprehensively calculating the sky noise temperature, the sun noise temperature, the atmospheric noise temperature and the system noise temperature of the radar to obtain the background noise temperature of the detection point. According to the invention, the background noise temperature of the phased array incoherent scatter radar can be accurately calculated, and the background noise state detected by the radar can be effectively obtained.

The utility model discloses novel movable radio detection equipment, which comprises a movable base and a mounting seat arranged on the upper surface of the movable base, a plurality of damping mechanisms are uniformly distributed on the upper surface of the movable base, the mounting seat is arranged on the movable base, and the damping mechanisms are arranged on the mounting seat. The lower surface of the mounting base is connected with the upper end of the damping mechanism, a clamping mechanism is mounted on the upper surface of the mounting base through a connecting mechanism, the clamping mechanism is composed of a plurality of clamping plates, fixing plates are arranged on the outer side surfaces of the clamping plates, and the sides, away from the clamping plates, of the fixing plates are inclined planes; the device has the advantages that the front side, the rear side, the left side and the right side of the detection equipment main body are effectively fixed, the stability of the detection equipment main body is ensured, meanwhile, the multiple clamping plates move synchronously, the overall structure is simple, operation is convenient and fast, and the detection equipment main body can be conveniently and fast assembled or disassembled.

The invention belongs to the field of radio detection, particularly relates to a signal and data processing method for a multi-base incoherent scatter radar, and aims to solve the problem of failure of a conventional signal and data processing method for the multi-base incoherent scatter radar. The method comprises the following steps: dividing a detection distance range of a multi-base incoherent scatter radar beam into a plurality of detection distance doors, and calculating a signal autocorrelation function of each detection distance door; after time correction is carried out on the signal of the receiving station, an observation system equation constant is determined based on antenna gains of the transmitting station and the receiving station and the detection co-body height in combination with radar transmitting power; fitting the signal autocorrelation function according to the spectrum fuzzy function and the plasma scattering theory power spectrum function in combination with the observation system equation constant and the statistical error of the signal autocorrelation function, and performing inversion to obtain the ionosphere parameter of each detection range gate. The method is applied to a multi-base incoherent scattering radar, and an effective ionosphere multi-parameter result is obtained.

The utility model belongs to the technical field of radio detection. The utility model provides a T-shaped receiving antenna array of a three-coordinate radar, which comprises five receiving antennas, namely a first antenna, a second antenna, a third antenna, a fourth antenna and a fifth antenna, and the five receiving antennas are of a T-shaped non-centrosymmetric structure. A first antenna, a second antenna and a third antenna are sequentially arranged on the T-shaped non-centrosymmetric structure from right to left in the horizontal direction. The third antenna, the fourth antenna and the fifth antenna are sequentially arranged in the vertical direction of the T-shaped non-centrosymmetric structure from top to bottom. The three receiving antennas in the horizontal direction can obtain target azimuth information, the three receiving antennas in the vertical direction can obtain target pitching information, one receiving antenna is shared to form a T-shaped structure, and the number of receiving channels is reduced. The distance difference between the central positions of the antennas is smaller than half of the wavelength, so that the measured angle is not fuzzy, the total length of the antennas is increased, and the angle measurement precision is improved.

1. The name of this design product: Ground three-dimensional rotating baseline. 2. Purpose of this design product: used for radio detection and direction finding. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention discloses a multi-station clock taming method and device and computer equipment, and relates to the technical field of radio detection. A plurality of receiving stations receive signals sent by the same civil radiation source at the same time, each receiving station carries out frame synchronization capture on the received signals, and the actual sampling point number of each receiving station in M frame periods is determined; the received signal is a signal directly radiated by a civil radiation source; each receiving station determines the sampling point deviation of the receiving station according to the actual sampling point number and the expected sampling point number of the receiving station; the clock skew of the corresponding receiving station is determined through the sampling point deviation of each receiving station; the clock skew is used for adjusting the clocks of the corresponding receiving stations, so that the clocks of the receiving stations are kept consistent with the used civil radiation source clocks, and multi-station clock taming is realized.

A patient immersion sensor includes a radio detection and ranging (RADAR) apparatus to determine a time of flight (TOF) of a RADAR pulse and a reflected signal that is reflected by a patient or by a portion of a patient support surface supporting the patient. The TOF is indicative of an immersion depth or a distance toward bottoming out of a patient supported on the patient support surface, such as a mattress or a pad. The RADAR apparatus emits pulses of very short duration so as to be able to detect objects, such as a patient or a portion of a mattress or pad, at very close distances. The RADAR apparatus may use time-of-flight (TOF) between transmission of the pulse and receipt of a reflected signal to determine a distance toward bottoming out by the patient, thereby to determine if the patient is properly immersed into the patient support surface. Adjustments to inflation or deflation of one or more bladders are made to achieve a desired immersion amount within a tolerance range between upper and lower TOF thresholds.

A patient immersion sensor includes a radio detection and ranging (RADAR) apparatus to determine a time of flight (TOF) of a RADAR pulse and a reflected signal that is reflected by a patient or by a portion of a patient support surface supporting the patient. The TOF is indicative of an immersion depth or a distance toward bottoming out of a patient supported on the patient support surface, such as a mattress or a pad. The RADAR apparatus emits pulses of very short duration so as to be able to detect objects, such as a patient or a portion of a mattress or pad, at very close distances. The RADAR apparatus may use time-of-flight (TOF) between transmission of the pulse and receipt of a reflected signal to determine a distance toward bottoming out by the patient, thereby to determine if the patient is properly immersed into the patient support surface. Adjustments to inflation or deflation of one or more bladders are made to achieve a desired immersion amount within a tolerance range between upper and lower TOF thresholds.

The application belongs to the field of radio detection, and particularly relates to a phased array incoherent scatter radar background noise calculation method and system, aiming to solve the problem of calculating background noise in phased array incoherent scatter radar detection. The application comprises: calculating the sky noise temperature of a corresponding detection point according to any detection beam selected by the radar grating-free detection area; obtaining the spatial angle between the position of the sun and the position of the detection point, and combining the radar system parameters to determine the sun noise temperature of the detection point; determining the atmospheric noise temperature of the detection point according to the elevation angle of any detection beam and the detection environment temperature; and comprehensively calculating the sky noise temperature, the sun noise temperature, the atmospheric noise temperature and the system noise temperature of the radar itself to obtain the background noise temperature of the detection point. The application can accurately calculate the background noise temperature of the phased array incoherent scatter radar, and effectively obtain the background noise state of the radar detection.

The invention provides a shipborne radio detection azimuth calibration method and system, a medium and equipment, and relates to the technical field of radio detection. According to the scheme, the attitude information of the ship is obtained in real time, the rolling angle and the pitching angle are analyzed in the preset time window, the ship swing index capable of representing the current sea condition characteristics is obtained, then the current swing level of the ship is determined, and corresponding preliminary calibration schemes can be generated according to the swing states of different levels. When a high-precision detection task needs to be executed, the historical attitude data and the historical pointing compensation amount corresponding to the current swing level can be further obtained, and the prediction compensation weight is calculated by analyzing the historical data, so that the preliminary calibration scheme is optimized and adjusted. According to the mode of prediction compensation based on historical data, adjustment can be carried out through prediction under different current swing levels, and finally the azimuth calibration effect of the shipborne radio detection equipment under the high-precision pointing requirement is improved.

1. The name of the design product: radio detector. 2. The use of the design product: for detecting radio signals. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

A radio detection and ranging (radar) apparatus may include an antenna including a plate-shaped circuit board having one surface provided with a first element and a second element mounted thereon to transmit or receive radio waves, a radome configured to cover the one surface of the circuit board and including a protrusion protruding from an inner surface thereof at a side towards the circuit board, a shield configured to cover the first element and including a coupler that is detachably coupled to the protrusion, and a case coupled to the radome to cover the other surface of the circuit board.

The invention relates to a distributed low-slow small target photoelectric detection and identification system, and provides a distributed short-range photoelectric detection mode for solving the problems of weak protection capability, high protection cost and the like of radar, radio detection equipment and the like in an ultra-near low-altitude airspace in a low-slow small target prevention and control system taking an unmanned aerial vehicle as a main part. A plurality of low-cost short-range photoelectric detection devices are erected in a distributed networking manner, so that the functions of detection discovery, tracking identification, data fusion processing, situation display and the like of a threat target in an ultra-near low-altitude airspace are realized, and the coping requirements of ultra-near low-altitude defense are met. The deployment mode introduced by the system is an effective technical means for blind compensation detection in a conventional protection system, the detection loopholes of traditional detection equipment are made up, the detection efficiency and the equipment safety are improved, meanwhile, the deployment cost and difficulty of the ultra-near airspace are reduced, and an open networking mode is provided for protection of the ultra-near airspace.

The utility model relates to the technical field of radio detection tests, and discloses a slide rail test device for radio detection equipment. The device comprises a test platform, the test platform is fixedly connected with a slide rail, the slide rail is slidably connected with a connecting block, the connecting block is internally and rotatably connected with a first rotating rod, the two ends of the first rotating rod extend out of the connecting block and are fixedly connected with rollers, the connecting block is fixedly connected with an equipment frame, and the equipment frame is fixedly connected with a base. And a motor is fixedly connected into the equipment frame, the motor is in transmission connection with the first rotating rod, and a connecting plate is fixedly connected to the top of the equipment frame. When the device is used, the detection range of the radio detection device can be comprehensively detected by adjusting the directions of the radio detection device and the test metal ball, so that the device can detect the detection range of the radio detection device more accurately during the test, and the operation quality of the device is improved.

The application belongs to the field of radio detection, and particularly relates to a signal and data processing method of a multi-base incoherent scatter radar, and aims to solve the problem that the conventional signal and data processing method is invalid for the multi-base incoherent scatter radar. The application comprises: dividing the detection distance range of the multi-base incoherent scatter radar beam into multiple detection distance gates, and calculating the signal autocorrelation functions of the detection distance gates; after time correction of the signals at the receiving station, determining the observation system equation constant based on the antenna gains of the transmitting station and the receiving station, the detection common height, and the radar transmitting power; fitting the signal autocorrelation functions according to the spectral ambiguity function, the plasma scattering theory power spectrum function, the observation system equation constant and the statistical error of the signal autocorrelation functions, and inversely obtaining the ionospheric parameters of the detection distance gates. The application is applied to the multi-base incoherent scatter radar, and effective ionospheric multi-parameter results are obtained.

The invention relates to the technical field of radio detection, and discloses a processing method and system for coping with radio frequency band abnormity, and the method comprises the steps: building a background database, collecting a real-time data set, and determining a detection early warning period; analyzing the radio signal according to a detection early warning threshold value and a background database, judging whether a suspected abnormal signal exists or not, and marking the suspected abnormal signal; when the suspected abnormal signal exists, acquiring bandwidth and spectral characteristics to judge whether the suspected abnormal signal is an abnormal signal, and when the suspected abnormal signal is judged to be an abnormal signal, determining an initial risk coefficient; abnormal signals are extracted, signal frequencies, modulation modes and envelope shapes are identified, and clustering analysis is carried out on all the abnormal signals based on a clustering algorithm to judge whether frequency hopping signals exist or not; and when the frequency hopping signal exists, adjusting the initial risk coefficient and adjusting the next detection early warning period. According to the invention, early warning and prevention of malicious transmitting devices and potential leakage risks are realized, and the automation level of radio frequency band monitoring is enhanced.

The invention belongs to the technical field of deep learning, provides a low-altitude multi-modal data fusion method based on an attention mechanism, and realizes information fusion of multi-modal data of low-altitude primary radar, secondary radar, ADS-B, photoelectric video, radio detection and the like through a two-stage self-attention mechanism. According to the method, the track feature processing technology and the self-attention mechanism technology are combined, the problems of poor universality and learning performance in the prior art are solved, and the method has a heuristic effect on development of a universal multi-source data intelligent fusion framework in the fields of ground traffic management, air traffic management and the like. According to the method, various low-altitude multi-modal data input vectors with different sizes can be received and processed, and relevance, intention behaviors and the like among the vectors can be calculated, so that fusion and identification of the low-altitude multi-modal data are realized.