2059 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.

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 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.

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.

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.

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.

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

To provide a gate apparatus through which a user can efficiently pass.A gate apparatus is communicatively connected to an information processing apparatus including a first reading unit that reads a store leaving code to acquire first identification information for individually identifying a product for which a payment process has been completed. The gate apparatus includes a pair of side wall portions that are disposed to face each other with a passage interposed therebetween, a second reading unit that is provided on at least one of the pair of side wall portions and outputs predetermined radio waves to read, from an RFID tag attached to the product, second identification information for individually identifying a product that has passed through the passage, and a placement portion on which the information processing apparatus is placed. The placement portion is disposed above a reading region of the second reading unit.

This disclosure relates to a propagation environment estimation system capable of creating an environment for increasing, through learning, the simulation accuracy for propagation characteristics of wireless radio waves. This propagation environment estimation system comprises a simulation circuit and an error calculation circuit. The simulation circuit receives data of a verification area and a wireless radio wave source. Further, the propagation characteristics of the wireless radio waves in the verification area are simulated on the basis of the data. The error calculation circuit calculates an error between the simulation results and the results of verification of the propagation characteristics of the wireless radio waves in the verification area. Further, a parameter used by a learning model of the simulation circuit is updated so as to reduce the error. The simulation circuit receives the trained learning model. Further, the propagation characteristics of the wireless radio waves are simulated by using the trained learning model for newly inputted data.

To provide a configuration capable of surely making a wireless tag of an input material inputted through an input opening a reading target without making a wireless tag of a not-yet-inputted material a reading target.SOLUTION: A dust box 10 is stored in a storage part 30 after medical equipment E inputted through an input operation 21 passes through in a radio wave leakage prevention area S1, a wireless tag reader 40 and an antenna 41 are arranged so as to make a wireless tag T in the radio wave leakage prevention area S1 a communication target, and a radio wave absorption part 50 is arranged around the radio wave leakage prevention area S1.SELECTED DRAWING: Figure 5

The invention discloses a multipath time delay calculation method for an evaporation waveguide and scattering mixed channel under different distances, and the method comprises the steps: determining the length of a propagation path in an evaporation waveguide channel according to the radius of the earth and a central angle corresponding to the arc length of the propagation path in the evaporation waveguide channel; determining the propagation path length in the troposphere scattering channel according to the positions of the scatterer, the transmitting antenna and the receiving antenna; according to the propagation path length in the evaporation waveguide channel, the propagation path length in the troposphere scattering channel, the propagation speed of the electric wave and the channel time delay of the troposphere scattering channel, determining the multipath time delay of the evaporation waveguide and troposphere scattering mixed channel under different communication distances; and setting a code element interval of radio wave communication according to the multipath time delay, so that the radio wave communication adapts to switching of communication modes. According to the method, the multipath time delay of the evaporation waveguide and troposphere scattering mixed channel can be quickly calculated; code element intervals of radio wave communication are set according to multipath time delay, inter-symbol interference is avoided, and the bit error rate is reduced.

This communication apparatus comprises: a control unit that determines, on the basis of a first transmission time for performing a plurality of signal transmissions in a device, a second transmission time for radio waves to be used for the plurality of transmissions; and a communication unit that transmits the radio waves to the device in the second transmission time.

To specify the position of a movable body even in a situation where it is difficult to specify the position based on the received radio wave intensity of a beacon signal.SOLUTION: The method includes generating reception data including an area ID of an area in which a receiver is disposed, a received radio wave intensity of a beacon signal, and a reception time; performing image analysis on image data of an imaged area to detect the presence or absence of a movable body in the imaged area, and identifying a movable body ID of the movable body when the movable body is detected; generating image analysis data including the area ID of the area, the presence or absence of the movable body, the movable body ID of the movable body when the movable body is present, and the imaged time; and determining the presence or absence of the movable body using the received radio wave intensity and specifying the presence area based on the strength of the received radio wave intensity when the presence area can be specified, and specifying the presence area based on the image analysis data when the presence area cannot be specified.SELECTED DRAWING: Figure 8

An imaging system (MIS), optionally a medical imaging system, with wireless communication capability and related method. The imaging system comprises a gantry (RG) rotatable around a rotation axis. The gantry includes a detector device (D) capable of recording, in plural spatial positions, measurement data in relation to a subject (such as a patient) (PAT) to be imaged. The system also includes a radio transmitter (TX) for generating a directed radio beam propagatable along a propagation axis to transmit the measurement data to a radio receiver (RX). The radio transmitter (TX) is arranged at the rotatable gantry and is operable so that the propagation direction intersects the rotation axis in a location that is situated away from the rotatable gantry.