2632 results about "Radio wave" patented technology

The invention provides a multi-platform cooperative unmanned inspection task planning method and system for a wind power scene, and relates to the technical field of wind power plant inspection, and the method comprises the steps: based on a wind power plant three-dimensional scene model, adaptively dividing an inspection region, constructing a reachability path network, calculating an inspection difficulty coefficient according to target detection point information, and calculating a target inspection point; and generating an unmanned aerial vehicle and unmanned vehicle inspection area. A sensor is deployed to collect environment and equipment state data, feature vectors are extracted to establish an inspection constraint model, and main and branch inspection paths are planned on the reachability path network. And performing multi-platform relative positioning by using ultra-wideband radio waves, and dynamically optimizing an inspection path according to the equipment health score and the inspection constraint model. Through multi-platform cooperation, adaptive path planning and intelligent state identification, the wind power plant inspection efficiency and accuracy are improved, and the inspection cost is reduced.

The invention discloses a dynamic weight correction and path deviation probability prediction method for a vehicle track, which comprises the following steps of: acquiring vehicle data and multi-source dynamic data of the vehicle track in real time through an optical sensor, a radio wave sensor and an inertial navigation sensor, carrying out space-time calibration, extracting obstacle characteristics and road structure characteristics, and predicting the path deviation probability of the vehicle track. The obstacle movement trend is quickly captured through a space-time diagram sequence and a diagram convolutional neural network, real-time obstacle avoidance is realized in combination with dynamic weight adjustment, a driving intention is predicted by using a Bayesian neural network, a trajectory planning strategy is adjusted through weight correction, and uncertainty is reduced by using multi-source data fusion and probabilistic prediction. A closed-loop feedback mechanism continuously optimizes the model, and efficient operation is kept in complex scenes such as intersections and roundabout through real-time weight adjustment and closed-loop feedback, so that the purpose of quickly responding to dynamic obstacles or driving behavior changes can be achieved, and the precision of the path deviation prediction probability is improved.

An aspect of the present invention is an antenna pattern used in a UHF-band RFID inlay. The antenna pattern includes a first element and a second element. The first element is formed to include a loop portion and an emission portion. The loop portion includes a pair of electric power supply portions. The emission portion is connected to the loop portion, and extends line-symmetrically from the loop portion. The emission portion operates as a dipole antenna to emit a radio wave whose half wavelength is a first length. The second element is formed apart from the first element. The second element operates as a dipole antenna by electromagnetic coupling with the first element to emit a radio wave whose half wavelength is a second length. The second length is different from the first length.

The invention relates to the technical field of inertial assistance, in particular to a Beidou high-precision space-time reference dynamic compensation system based on inertial assistance, which is characterized in that an inertial measurement unit module is used for measuring original measurement data, and the original measurement data comprises a carrier phase and a Doppler observation value; the processing unit module is used for fusing the inertial measurement unit, executing real-time environment perception and dynamic modeling, classifying an operation environment and predicting error characteristics; performing an adaptive robust fusion filtering algorithm that dynamically adjusts filter parameters and switches a filter model to estimate the position and attitude of the carrier; and in combination with radio wave precision single-point positioning enhancement service, super-tight combination signal tracking and integrity monitoring are realized, an estimated inertial assistance system state is fed back to a tracking loop of the multi-frequency Beidou receiving module, and real-time fault detection is performed on original measurement data.

The invention relates to the technical field of earthquake prediction, in particular to a submarine seismic oscillation prediction method and device based on earthquake exploration, and the method comprises the following steps: selecting a monitoring region, collecting the submarine topographic data of the monitoring region, and drawing a topographic map; selecting a plurality of monitoring points according to the topographic map; geomagnetic field information, electric wave information, micro-seismic activity information and seabed deformation information of each monitoring point are collected and recorded; converting the collected information into acoustic signals and transmitting the acoustic signals to a sea surface buoy, and converting the acoustic signals into electric signals by the sea surface buoy and transmitting the electric signals to a ground data center; by optimizing site selection of monitoring points, integrating geomagnetic-electric wave-microseismic-deformation multi-source data, realizing high-efficiency data transmission by using an acoustic-electric staged communication chain, and finally realizing early recognition of earthquake precursor in combination with threshold analysis, the method can significantly improve the coverage range, data precision and early warning timeliness of seafloor earthquake monitoring, and has good application prospects. And a technical support is provided for marine geological disaster prevention and control.

To provide a game machine that allows game parlor staff or the like to easily notice malfunctions which have occurred in detection means.SOLUTION: A Pachinko game machine PZ4 includes first detection means (magnetic sensor MS) capable of detecting a first event (magnetic fraudulent act), and second detection means (first radio wave sensor FR, second radio wave sensor SR) capable of detecting a second event (radio wave fraudulent act). When a malfunction (e.g., disconnection) occurs in wiring related to the first detection means, the game machine can issue a first abnormality notification (error notification in a magnetic abnormality notification mode). When a malfunction (e.g., disconnection) occurs in wiring related to the second detection means, the game machine can issue a second abnormality notification (error notification in a sensor abnormality notification mode) that is different from the first abnormality notification.SELECTED DRAWING: Figure 59

The invention provides a mine personnel positioning method and system based on wireless communication, and relates to the technical field of mine safety, and the method comprises the steps of data collection, model construction, structure prediction, base station position and number definition, UWB base station installation, base station parameter setting, personnel positioning and positioning display. The system comprises a data acquisition module, a model construction module, a structure prediction module, a base station position and number definition module, a UWB base station installation module, a base station parameter setting module, a personnel positioning module and a positioning display module. According to the method, the installation positions and the number of the UWB base stations are defined, the UWB base stations are installed and base station parameters are set according to the coal mine channel prediction number and the terrain prediction structure, personnel positioning and displaying are carried out through the UWB base stations, the signal interference influence of the coal mine channel number and the dynamic change of the terrain structure on radio waves in the channel propagation process is overcome, and the working efficiency is improved. The purpose of improving the positioning accuracy of the underground personnel is achieved.

The invention provides an RFID label positioning error correction method based on deep learning, and the method comprises the following steps: 1, deploying a multi-mode sensing network in a target region, synchronously collecting radio wave signals and environment auxiliary data of an RFID label, and constructing a space-time multi-dimensional feature data set; step 2, constructing a joint architecture hybrid model composed of a space-time Transform network and a generative adversarial network; according to the method, a space-time multi-dimensional feature data set is constructed by fusing RFID signals and environment auxiliary data through a multi-mode sensing network, adaptive parameters are dynamically generated in combination with a model-independent meta-learning algorithm so as to quickly respond to environment changes, multi-path signal correlation is captured by using a space-time Transform and generative adversarial network combined architecture, feature expression is optimized, and the robustness of the system is improved. The problems that a single signal feature is missing, model parameters cannot dynamically adapt to the environment and the anti-interference robustness of a traditional network is insufficient are effectively solved, and the effectiveness, the real-time performance and the precision of RFID label positioning in the complex environment are remarkably improved.

The invention discloses a low ionosphere intelligent inversion method based on VLF radio wave detection, and the method comprises the steps: collecting ground-based very-low-frequency wave amplitude data, defining a gated cycle unit network objective function as an optimized performance index, and employing a mean square error as the objective function; and carrying out dynamic position updating by adopting a whale optimization algorithm, setting a double-stop criterion, and stopping iterative training to obtain an optimal model when the maximum number of iterations or a verification error convergence threshold value is reached. The calculation result of the LWPC model is used as a training set, the GRU network is used as an objective function estimator from foundation very low frequency data to low ionosphere parameters, the inversion method can accurately approach a real model, and the algorithm performance is effective and feasible and is remarkably improved compared with an existing model.

A radio-wave sensor installation assistance device includes: a target position determination unit that determines a target position to be irradiated with a radio wave emitted from a radio-wave sensor, in an image including a crosswalk; a candidate position designation unit that receives designation of a candidate position to install the radio-wave sensor; and a display control unit that causes a display device to display a radio-wave irradiation range of the radio-wave sensor so as to be superimposed on the image, the radio-wave irradiation range being determined based on the target position and the candidate position. The candidate position designation unit can receive an instruction of a movement of the designated candidate position. The display control unit changes the shape of the radio-wave irradiation range according to the instructed movement of the candidate position, with the target position being fixed.

An antenna module is configured to receive a signal from a baseband circuit and to radiate a radio wave. The antenna module includes a dielectric substrate, radiating elements, and a connector. The dielectric substrate includes planar sections having different normal directions. A first radiating element is disposed in or on the planar section. A second radiating element is disposed in or on the planar section. The antenna module is configured to transfer a radio-frequency signal to a third radiating element, which is externally disposed, via the connector. The size of the second radiating element is smaller than that of the third radiating element.

An antenna apparatus includes a board, an integrated circuit chip including a transmitting antenna and a receiving antenna and mounted on the board, a waveguide having a first aperture provided on the board side and surrounding the transmitting antenna and the receiving antenna in aperture view, a second aperture provided on a rear side with respect to the first aperture in a radiation direction of the transmitting antenna, and a first inner wall surface connecting the first aperture and the second aperture, a radio wave lens fixed to the second aperture, and a first radio wave absorber disposed on the first aperture side in a space surrounded by the first inner wall surface. At least part of the first radio wave absorber is located inside a first path of a first direct wave, and the first radio wave absorber is located outside a second path of a second direct wave.

The invention belongs to the technical field of radio wave propagation, and particularly discloses a three-dimensional FDTD complex path ASF prediction method based on multiple GPUs. According to the method, the three-dimensional FDTD algorithm is realized through multiple GPUs, and the method is used for predicting the ASF on a complex path. The method comprises the following steps: firstly, preprocessing parameters, and copying the parameters to a device end, namely a GPU end; secondly, updating an electric field component in the whole calculation area; then updating the field source, and exchanging the electric field components # imgabs0 # and # imgabs1 # on the adjacent GPUs; updating the magnetic field component in the whole calculation area; and finally, circulating and judging an end condition, and outputting the ASF when the calculation is finished. The method solves the problem of poor ASF prediction precision caused by the fact that a two-dimensional time delay prediction method cannot consider the transverse effect, overcomes the defect that a traditional three-dimensional FDTD method is difficult to simulate large-area low-frequency ground wave propagation, and provides a theoretical basis and technical support for improving the service precision of a low-frequency radio navigation time service system.

Provided are: an antenna device in which the minimum detection distance is shortened; and a radar device.　The antenna device comprises: a waveguide having a first opening, a second opening that is larger than the first opening when observed in a planar view of the opening, and an inner wall surface connecting the first opening and the second opening; an antenna that is provided inside the first opening so as to be positioned, when observed in a planar view of the opening, inside the first opening, directed toward the inside of the waveguide; and a radio wave lens provided inside the waveguide, the radio lens having a first surface located on the first opening side and located more toward the inside of the waveguide than the first opening, a second surface located on the second opening side and located more toward the inside of the waveguide than the second opening, and an outer edge part which is sized so as to close a gap between the inner wall surface and the outer edge part when observed in a planar view of the opening.

The invention relates to the technical field of positioning or existence detection adopting reflection or re-radiation of radio waves, in particular to a GNSS (Global Navigation Satellite System) positioning method and device based on random sampling and electronic equipment, and the method comprises the following steps: carrying out sky partitioning based on a currently receivable satellite list and azimuth angle information thereof, and determining a sky area to which each satellite belongs; performing distance optimization random sampling of satellites in each sky area to generate a sample group; respectively carrying out least square calculation on the pseudo-range observation value of each satellite in the sample group to obtain a user position and road side information corresponding to the sample group; and determining an expected road side based on the user position and the road side information, so as to obtain the positioning information of the mobile terminal based on the expected road side. Therefore, the technical problem that the actual use experience of a user is affected due to the fact that the GNSS positioning accuracy and the road side dividing accuracy are low in complex scenes such as urban canyons in the related technology is solved.

There is provided a reflection node for handling link failure towards a network node. The reflection node includes a controller for controlling a passive meta-surface having a controllable reflection angle for reflecting radio waves over a communication channel between a network node and a wireless device. The reflection node includes a transceiver unit for receiving instructions from the network node over a control channel. The transceiver unit is configured to determine a link failure event on the control channel between the reflection node and the network node. The controller is configured to, during the link failure event, control the reflection angle of the passive meta-surface using reflection settings specified by configuration data for reflecting the radio waves over the communication channel.

The invention discloses a three-dimensional (SBC-HIE-FDTD) method for efficiently calculating the propagation characteristics of electromagnetic waves in a graphene dispersive medium on the basis of a mixed explicit-implicit finite difference time domain (HIE-FDTD) method and a surface boundary condition (SBC) of the graphene, and the three-dimensional SBC-HIE-FDTD method is used for efficiently calculating the propagation characteristics of the electromagnetic waves in the graphene dispersive medium. According to the three-dimensional SBC-HIE-FDTD method for efficiently calculating the electromagnetic field in the graphene dispersive medium, the advantages of the HIE-FDTD method in thin dielectric layer modeling and the advantages of the SBC method in the aspect of zero-thickness graphene sheet modeling are fused, so that the size of a small grid caused by a graphene sheet or a thin dielectric layer does not limit the time step length any more; compared with other simulation methods based on a graphene structure, the method has the advantages that the calculation efficiency is better, and the method is particularly suitable for analysis and simulation of radio wave propagation characteristics in a terahertz graphene absorber structure.

A radio wave lens includes a first surface, a second surface, and an optical axis passing through the first surface and the second surface. The first surface has concave portions or convex portions provided concentrically or symmetrically with respect to the optical axis in plan view, and a depth of each of the concave portions or a height of each of the convex portions is set according to a distance from the optical axis.

The invention discloses a human and vehicle positioning method and system driven by grid codes, and relates to the technical field of satellite navigation and position service, and the method comprises the steps: obtaining the landform information through a radar and a GIS, carrying out the multi-level space grid division through combining with a Beidou coordinate system, and obtaining a grid set with codes and fuzzy bands; real-time position data of people and vehicles are collected through the Beidou terminal, fuzzy zone intrusion analysis is performed after grids are matched, grid codes with normal / abnormal identifiers are generated, backtracking correction is performed when the grids are abnormal, direct adoption is performed when the grids are normal, and accurate positioning is achieved. According to the invention, the technical problems of poor suitability of traditional grid coding, imperfect boundary processing and dynamic tracking mechanism, easy lattice jumping in positioning and insufficient precision in the process of realizing human-vehicle positioning based on radio wave positioning are solved, and the technical effects of optimizing coding adaptation, boundary and tracking mechanism and realizing accurate and continuous human-vehicle positioning are achieved.

The invention discloses a parallel modeling method for simulating propagation of electric waves in irregular terrains, and relates to the field of radio. The method comprises the following steps: constructing a terrain-related first parabolic equation about radio wave propagation; introducing an auxiliary function, and determining a second parabolic equation; writing the second parabolic equation into a solution in an exponential function form, performing approximate transformation on an exponential term containing a topographic factor, and performing high-order fractional approximation on an exponential term containing a pseudo differential factor; based on a finite difference method, solving an intermediate variable of a high-order fraction in parallel, and further solving a field function subjected to terrain translation; and restoring the field function in combination with the auxiliary function and the terrain profile. Compared with the prior art, the method has the advantages of high calculation precision and high calculation efficiency, and is particularly suitable for predicting radio wave propagation loss on irregular terrains.

A vehicle antenna apparatus installed in a vehicle is provided. The vehicle antenna apparatus includes an array antenna including a plurality of antenna elements, and a processor configured to perform at least one instruction. The processor is configured to obtain, based on a sensing result of a sensor for sensing a position of a user riding in the vehicle, information about the position of the user, adjust, based on the information about the position of the user, a phase of at least one radio wave signal such that a position of a radiation pattern formed by the at least one radio wave signal output from the plurality of antenna elements and the position of the user riding in the vehicle vary from each other, and control the array antenna to output the at least one phase-adjusted radio wave signal.

A radio wave propagation environment reproduction system according to an embodiment includes: a transmitter to transmit radio waves in a predetermined direction in a reverberation chamber; a reflection angle change RIS to reflect the radio waves transmitted; an installation angle controller to control an installation angle of the reflection angle change RIS; a reflection angle controller to control a reflection angle of the radio waves; a direction-of-arrival estimator to estimate a direction of arrival of the radio waves reflected; and a control server to control the installation angle controller and the reflection angle controller on the basis of the direction of arrival of the radio waves estimated.

Provided are an information processing device, an information processing method, and a computer program that enhance spectrum utilization efficiency in an effective manner.An information processing device of the present disclosure includes a processing unit that calculates, on the basis of position information regarding a first receiver and arrangement information regarding a repeater that reflects a first radio wave transmitted from a first transmitter to relay the first radio wave to the first receiver, an interference source region for determining whether or not a second transmitter that makes a secondary use of a spectrum identical to or adjacent to a spectrum used by the first transmitter and the first receiver is located at a position where there is a possibility that a second radio wave transmitted by the second transmitter is reflected by the repeater to cause interference affecting the first receiver.

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 relates to a reconfigurable equipment simulation system based on software radio, and the system achieves the high-integration, user-friendly and efficient-management reconfigurable equipment simulation system through the modularization and seamless integration of a radio waveform design function, an equipment simulation user operation interface design, a business logic function design and a project management function. Therefore, even if a user does not have a deep programming capability, the user can quickly construct, test, manage and deploy the equipment simulator with complete functions. The system is rich in waveform component and UI component library, customizable in function and good in flexibility, software radio waveform design and equipment simulation are innovatively and seamlessly integrated, automatic non-inductive or manual upgrading can be achieved, the universality is good, various equipment simulators can be designed, the designed equipment simulators have open function expansion, and the system is suitable for popularization and application. And a complete project management process is provided.

A device (100) and a method (200) for evaluating a radio wave propagation a wireless communication in an environment (300) is provided. The method (200) comprises the step of obtaining (S202) a first path (320) of the radio wave propagation (300) in the environment (300), the first path comprising interaction points of a sequence of interactions of the radio wave propagation with physical objects (308) in the environment (300), the first path (320) further comprising a segment (314; 316) between each pair of the subsequent interaction points. The method (200) further comprises the step of modify (S204) the first path (320) by shifting the at least one interaction point of the first path (320) from a first location (310) to a second location (312), resulting in a second path (322) comprising at least one modified segment (314; 316). The method (200) further comprises the step of determining (S206) at least one adjusted interaction within at least one segment (314; 316) between at least one pair of subsequent interaction points in the second path (322) by tracing the at least one modified segment (314; 316) of the second path (322) in the environment (300). The method (200) further comprises the step of evaluating (S208) the radio wave propagation along the second path (322) for each segment (314; 316) according to the at least one adjusted interaction and each interaction at the at least one shifted interaction point.

An antenna device comprises a substrate including a planar first region and a planar second region; at least one first radiating element, arranged in the first region, that communicates a radio wave of a first frequency; and at least one second radiating element, arranged in the second region, that communicates a radio wave of a second frequency. A separation direction is a direction of a straight line connecting a first geometric center position of the at least one first radiating element and a second geometric center position of the at least one second radiating element, and in a case that the second region is viewed along a normal direction of the second region, an angle formed by the separation direction and a polarization direction of the at least one second radiating element is equal to or greater than 45° and equal to or less than 90°.

An object is to provide a small directional antenna. A radio wave deflection element is formed as a plate-like member including a plurality of stacked dielectric layers, having a principal surface perpendicular to a first direction, and having a longitudinal direction in a second direction perpendicular to the first direction; and a radio wave source is disposed so as to be separated from the radio wave deflection element in the first direction and offset from a center of the radio wave deflection element by a predetermined distance in the first direction, and configured to emit a radio wave to the radio wave deflection element. Dielectric constants of the plurality of dielectric layers decrease in a stepwise manner as a distance from the center of the radio wave deflection element increases in the first direction.

Provided are methods, systems, and computer program products for lane keep tracking and / or localization of a vehicle using a radar to detect metallic particles in paint applied to lane markings or curb markings. An example method may include: causing a radar system of a vehicle to output radio waves; receiving a radar image from the radar system corresponding to returned radio waves; determining a portion of the radar image includes lane or curb markings, wherein the lane or curb markings are embedded with metallic particles; and determining a location of the vehicle based at least in part on the determined portion of the radar image that includes the lane or curb markings.

To provide a kick sensor capable of preventing erroneous detection.SOLUTION: A kick sensor 1, which is designed to detect a movement of a human leg serving as a trigger of controlling a vehicle door when installed in a vehicle, includes a first antenna 10 that receives radio waves from at least the side of the vehicle door, and a second antenna 20 that receives radio waves from at least the bottom of the vehicle door.SELECTED DRAWING: Figure 2