2241results about "Close-range type systems" patented technology

The invention provides a key information extraction method and system based on a multi-modal model. According to the scheme, building structure stress and optical cable topological data are fused, structural deformation and optical signal attenuation characteristics are associated through a multi-modal model, and the node failure probability is predicted. Screening nodes with high failure risk, planning an isolated standby optical cable path, synchronizing main and standby signals by adopting a space diversity technology, and generating a redundant signal set through cross-modal alignment; the redundant data is divided into fragments according to geographic grids, and a multi-modal hash identifier is generated by combining the wavelength of a far-end node optical signal and a regional compression resistance parameter. And when the nodes fail, matching data fragments of the high compression resistance area according to the Hash identifier, and reconstructing key information by using a multi-path time-frequency complementary feature to realize network fault self-healing and intelligent redundancy recovery. According to the technical scheme provided by the invention, intelligentization and high efficiency of communication network failure prediction and redundancy recovery are realized, and the network stability and the service continuity are remarkably improved.

The invention provides an old cell environment sensor data processing method and system based on ultraviolet light communication. The method comprises the following steps: acquiring an environment feature set of an external facade of an old community building through a distributed environment sensor array, and constructing an ultraviolet channel reflection skeleton in combination with an obstacle coordinate; fusing the aging factor attenuation model and the physical space topological structure through a dynamic space-time grid division engine, and generating a multi-dimensional feature segment set carrying space-time attenuation weights; analyzing channel interference in real time based on the interference intensity probability matrix of the ultraviolet channel reflection skeleton, and generating a multi-band transmission configuration result; and calibrating multipath transmission time delay through a phase compensation factor to construct an ultraviolet light pulse sequence carrying a path feature code, and when the difference degree of adjacent units exceeds a critical condition, triggering a closed loop feedback mechanism and updating a link weight. According to the technical scheme provided by the embodiment of the invention, the efficiency and precision of old cell environment sensor data processing can be improved.

This invention relates to an optical wireless communication (OWC) system that is configured to make use of observations of straylight reflections as generated by an OWC transmitter in order to support contention-based channel access including that of multiple basic or extended service sets (BSS, ESS) with overlapping coverage areas. It is proposed to have an additional optical signal or signal component generated in the OWC transmitter which allows for simple detection without having to do heavy digital demodulation processing. A learning phase may allow to adjust for environmental conditions like reflectivity or transmitter characteristics.

The invention provides an LED spectrum fingerprint open set identification method based on Transform and support vector data description and related equipment. The method comprises the following steps: collecting an optical signal emitted by at least one LED device, converting the optical signal into spectral data, and dividing the spectral data into a training set and a test set; inputting the training set into a preset feature extraction network to carry out network training so as to learn and obtain a spectral feature vector; wherein the feature extraction network comprises a Transform branch, a CNN (Convolutional Neural Network) branch and a feature interaction module; based on the spectral feature vectors of the training set, constructing a hypersphere model by using an SVDD algorithm, and optimizing parameters of the hypersphere model to obtain an optimal hypersphere model; and inputting test samples in a test set into the trained feature extraction network to obtain corresponding spectral feature vectors, and inputting the spectral feature vectors of the test samples into the optimal hypersphere model for classification.

A communication apparatus for performing underwater visible light communication with a target communication apparatus includes a visible light communicator that transmits and receives a visible light signal including communication data, a sound wave communicator that receives a sound wave signal including information used to control establishment of visible light communication connection, the sound wave signal having been transmitted from the target communication apparatus or another communication apparatus, and a controller that performs control to establish the visible light communication connection with the target communication apparatus, based on the information included in the received sound wave signal.

The invention discloses an indoor visible light fusion positioning method based on deep learning. The method comprises the following steps: step 1, acquiring AoA information and UWB distance information data of visible light at different positions, preprocessing the data, and converting the data into a two-dimensional matrix format to facilitate network input; 2, constructing a network model for extracting features of the preprocessed data, performing feature fusion, processing the fused features, and outputting positioning continuous coordinate values of the obtained data; step 3, training the network model, using samples including and not including AoA data, and ensuring that the network model can perform effective learning under the condition that only UWB data exists; according to the invention, the penetrability of the UWB signal is utilized to make up for the defect that visible light is easy to block, and high precision and stability can be maintained in different environments.

The invention relates to the field of optically-carried information technology and provides a method and device for optically-carried information transmission based on full-spectrum LEDs. The method addresses the problem of visual perception interference caused by multi-color LEDs used for data transmission in the prior art. The method includes: dividing the data to be transmitted according to the first transmission demand information, obtaining a second preset number of data segments; selecting target monochromatic LEDs based on the luminous characteristics of the LEDs and the first transmission demand information; processing the data segments using the target LEDs and preset modulation algorithms to generate corresponding LED control signals; and controlling the target LEDs to transmit optically-carried information based on the control signals. This invention ensures optical communication performance while effectively reducing interference, thus improving the reliability of the optically-carried information system.

The invention discloses a wireless network high-speed switching automatic test optimization method based on edge computing, and relates to the field of wireless network switching. An improved gravitational search algorithm is combined with a GIS deployment node, multi-dimensional data is collected through an intelligent heterogeneous sensor and reinforcement learning, preprocessing is carried out through a denoising auto-encoder based on a GAN, modeling is carried out through space-time diagram convolution and an LSTM mixed model, a test case is generated through reinforcement learning Monte Carlo tree search, and testing is carried out on edge nodes in a distributed mode. And an optimization strategy is formulated through multi-agent deep reinforcement learning, and strategy implementation and feedback are realized through SDN and a block chain. According to the method, multi-dimensional acquisition, intelligent modeling, automatic testing and deep reinforcement learning optimization are realized, the high-speed switching performance is improved, the time delay and failure rate are reduced, the testing efficiency is improved, resource allocation is optimized, the network security is enhanced, and stable and efficient operation of the wireless network is guaranteed in an omnibearing manner.

The present application discloses an indoor optical wireless communications-oriented general geometry-based stochastic channel modeling method, which belongs to the field of wireless communication channel modeling. The method includes: setting scenario layout and frequency band related parameters; generating an object reflection cluster birth-death process matrix and random numbers for controlling a blocking effect and propagation component classification; initializing a scattering cluster and intra-cluster scatterers; updating and calculating model parameters varying with space and time; calculating a light source radiation intensity, the power distributions of object reflection and particle scattering, and an equivalent reflection coefficient; and calculating a subchannel impulse response, and determining whether a propagation component exists, to generate a final channel impulse response. The general geometry-based stochastic channel modeling method for indoor optical wireless communications of the present invention can utilize the common characteristics of the wireless frequency bands of light and the unique characteristics of the frequency bands of infrared light, visible light and ultraviolet light. By setting corresponding parameters, the established model can support different frequency bands to be flexibly applied to the simulation and performance evaluation of 6G indoor optical wireless communication systems.

The invention discloses a logistics positioning navigation system and method based on visible light communication. The system comprises a visible light transceiving array used for controlling an LED lamp to emit visible light carrying coded information of position information and service information; the navigation service module is used for processing the visible light with the coding information; the signal processing module is used for detecting the visible light with the coding information, calculating the initial position of the target cargo and correcting the initial position based on the processed visible light; and the path planning module is used for receiving the information of the signal processing module, displaying the position information of the target goods and planning a navigation path. According to the invention, the efficiency and accuracy of logistics operation are improved.

A window mounted wireless gateway system having an indoor unit to communicate with user equipment within a physical structure and an outdoor unit configured to communicate with a network. The indoor unit and outdoor unit may, respectively, be applied to the interior and exterior panes of a window of the structure. The indoor and outdoor units may be in optical communication with each other via optical signals transmitted through the window.

Data are optically transmitted from a power tool device, such as a power tool, a power tool battery charger, power tool pack adapter, and / or a battery pack. The data are stored in a memory of the power tool device and are encoded as optical signal data to provide an encoded representation of the stored data. An optical transmitter (e.g., a light emitting diode or a flat panel display) transmits the optical signal data, which are detected or otherwise received by an optical receiver device, which may include a camera or other photodetector. The optical signal data may include light signals generated by an LED, where the data are encoded using an encoding scheme that modulates one or more characteristics (e.g., amplitude, wavelength, color) of the generated light signals. The optical signal data may also include images (e.g., barcodes, QR codes) or characters.

An optical emission array includes an optical input portion configured to provide a parent laser source for the optical emission array, and an optical output portion including a plurality of child laser emitters. Each child laser emitter of the plurality of child laser emitters is injection-locked to the parent laser source. The optical emission array further includes at least two optical distribution branches (i) disposed between the optical input portion and the optical output portion, and (ii) optically connecting at least two child laser emitters of the plurality of child laser emitters, respectively, to the parent laser source.

The invention discloses a visible light communication data transmission method based on dynamic modulation, and particularly relates to the field of visible light technology communication. The method comprises the following steps: performing nonlinear dynamic feature extraction on an actual light intensity signal emitted by a light emitting diode to generate a spectral response feature set; performing segmented analysis on the frequency domain distortion evolution trend based on the frequency spectrum response feature set to obtain a plurality of frequency spectrum distortion subintervals; performing local modulation parameter optimization on each spectrum distortion subinterval to obtain a dynamic local modulation parameter set; mapping the dynamic local modulation parameter set into a modulation driving strategy sequence, and generating a dynamic modulation waveform signal sequence; performing detection and time-frequency feature extraction on the dynamic modulation waveform signal sequence to obtain a target signal sequence after noise suppression; and the target signal sequence is demodulated, complete data is recovered, visible light communication data transmission is completed, and the optical communication signal quality and the data recovery capability in a complex modulation environment are effectively improved.

An automated storage and retrieval system includes a three-dimensional storage grid for storing storage containers; first and second container handling vehicles operating on the storage grid; and a central communication system for controlling and communicating with the container handling vehicles for handling storage containers in the storage grid. The automated storage and retrieval system includes a barrier separating the three dimensional storage grid into a first section and a second section. The barrier has two states: a first state in which the container handling vehicles are allowed to move between the first section and the second section; and a second state, in which the container handling vehicles are physically prevented from moving between the first section and the second section by means of the barrier.

The invention provides a highway cloud toll collection system data transmission method, and relates to the technical field of data transmission. The highway cloud toll collection system data transmission method specifically comprises the following steps: S1, data acquisition; s2, data preprocessing; s3, transmitting visible light communication data; s4, road side unit data receiving and processing; s5, encrypting the data and transmitting the data to an edge computing node; s6, edge computing node data processing; s7, uploading the data to a cloud platform; and S8, carrying out deep analysis on the cloud platform data. The invention provides an expressway cloud toll collection system data transmission method which has the advantages of efficient data transmission, high safety, high reliability, intelligent data processing, high expansibility, cost effectiveness and the like. The overall performance and the user experience of the highway toll collection system can be obviously improved.

Methods and apparatus for conveying directionality and distance information from a transmitter to a receiver within the coordinate system of the transmitter. Conveying the directionality and distance information to the receiver may, for example, reduce computational loads at the receiver. The signal from the transmitter may include information for rendering digital content and information indicating the direction and distance of the transmitter, and the receiver may render the digital content using the direction and distance to reduce processing at the receiver. Alternatively, the signal may include pre-rendered content based on the direction to further reduce processing at the receiver.

The invention provides an electric power optical communication positioning system and method based on a PLC, and relates to the technical field of PLC electric power optical communication. After a real-time user starts a mobile terminal camera, a real-time optical signal of a target lamp is captured through the camera; the mobile terminal obtains a real-time ID and a real-time physical coordinate by decoding the real-time optical signal; after receiving a target parking space number input by a real-time user, the mobile terminal matches a parking space lamp ID and a parking space physical coordinate pre-bound with the target parking space number; and calculating a navigation path according to the real-time physical coordinates and the parking space physical coordinates, and outputting a real-time navigation path. The technical problem that in the prior art, due to the fact that underground space positioning is high in cost, poor in precision and prone to interruption of positioning communication, sub-meter continuous positioning and intensive management are difficult to carry out in a network-free underground space is solved. The comprehensive technical effects of remarkably saving the cost, improving the positioning precision, optimizing the user experience and enhancing the management efficiency are achieved.

The invention relates to the technical field of optical communication, in particular to an automobile headlamp communication system and method based on image frame interpolation, comprising a transmitting end and a receiving end, a vehicle-mounted central control system of the transmitting end is used for receiving input to-be-transmitted information, and an ambient light detection module evaluates an external illumination condition in response to the input of the to-be-transmitted information; an image gray value and frame insertion frequency are set based on the illumination intensity, the image coding module codes information to be transmitted based on the set image gray value to generate a projection image frame, and the projection module inserts the projection image frame into a normal illumination frame sequence of a vehicle lamp based on the frame insertion frequency and projects the projection image frame to an external environment; the image acquisition module of the receiving end is used for acquiring a projection image frame, the image decoding module preprocesses the projection image frame and then decodes the projection image frame, and the information to be transmitted is restored and sent to the vehicle-mounted central control system. According to the invention, vehicle lamp communication at a certain distance in a traffic environment can be realized on the premise of ensuring normal vehicle lamp illumination.

A self-aligning window mounted communication apparatus is discussed herein. In some examples, a wireless gateway may comprise a first unit to be mounted outside a window and a second unit to be mounted inside the window. A first unit and a second unit may each include an optical unit, a coupling unit, and a housing unit. A first optical unit may include a magnetic array with polarities of the magnetic elements configured to orient with a second optical unit in a single orientation. The optical unit(s) may be movably coupled with the respective coupling unit(s) so that the optical unit may move with various degrees of freedom and thus, when the first and second units are mounted on a window, the optical units can self-align based on the respective magnetic arrays and the degrees of freedom afforded by the movable coupling with the coupling unit.

A wearable device with an embedded keepsake, said apparatus comprising at least a transparent enclosure forming a keepsake housing; said housing filled with a pulverized expression of the keepsake for display via the transparent housing; and the filled keepsake housing embedded within any portion of the wearable device.

A visible-light communication and illumination array includes a substrate and plural surface-emitting superluminescent diodes, SLDs, distributed across the substrate. A first set of SLDs of the plural SLDs generates a first light beam having substantially a first wavelength, a second set of SLDs of the plural SLDs generates a second light beam having substantially a second wavelength, and a third set of SLDs of the plural SLDs generates a third light beam having substantially a third wavelength. The array further includes a controller configured to encode at least one of the first light beam, the second light beam and the third light beam to transmit information. A combination of the first light beam, the second light beam and the third light beam produces white light.

The invention discloses an intelligent seabed energy detection system and method based on visible light communication, and belongs to the technical field of deep sea detection, the detection system comprises a data acquisition system (1) and a visible light communication system (2), the data acquisition system (1) structurally comprises a high-definition camera (11), an underwater sensor (12) and a first analog-to-digital converter ADC (13), the visible light communication system (2) structurally comprises a transmitting end and a receiving end; the detection method comprises the steps of front-end acquisition, signal conversion, signal processing, optical signal transmission and signal restoration. The characteristics of high frequency and large bandwidth of light waves are utilized, the intensity of light is modulated, binary code element signals are converted into optical signals, the optical signals are received through the photoelectric detector for underwater information transmission, efficient and real-time submarine energy monitoring and analysis are achieved, and comprehensive technical support is provided for development and utilization of submarine energy.

The invention relates to an underwater visible light signal recovery method based on transfer learning, and aims to solve the problems of signal noise, distortion and communication performance reduction caused by disturbance of water turbidity, flow velocity, ambient light intensity and the like on an underwater visible light communication (UVLC) system. In combination with transfer learning and a generative adversarial network (GAN), data are acquired through a self-developed hardware platform, background data are generated through MATLAB simulation, simulation and real image features are fused by using a conditional generative adversarial network (cGAN) to generate simulation data, signal recovery capability is trained by using a U-NetGAN model, and finally the system is deployed at a receiving end. Compared with the prior art, the scheme overcomes the problems that traditional modulation is poor in adaptability under disturbance of water turbidity, flow velocity and the like and is difficult to deal with a complex underwater environment; the defects that a deep learning method depends on large-scale data and cross-scene generalization is weak are overcome. Through the combination of transfer learning and GAN, the UVLC system communication performance is significantly optimized, the delay is low, the complexity is low, and actual deployment requirements are better met.

A communication control device that includes a light transmission condition generation unit that generates a light transmission condition for transmitting the first spatial light signal including the transmission signal toward a first address, a light transmission control unit that controls a light transmitting device to transmit the first spatial light signal toward the first address, a signal acquisition unit that acquires a reception signal included in the second spatial light signal that has received the second spatial light signal, a signal analysis unit that analyzes the reception signal and extracts a second address in a second transmission coordinate system, the second address being included in the reception signal, and a signal generation unit that generates the transmission signal including the first address, generate the transmission signal including the first address and the second address according to a result of analyzing the reception signal, and output the generated transmission signal.

The invention discloses a visible light communication channel selection optimization method based on a genetic algorithm, and aims to improve the global optimization capability and dynamic adaptability of channel selection. The method comprises the following steps: performing high-precision parameter acquisition and preprocessing on an available visible light communication channel to generate an initial population; designing a multi-objective fitness function, comprehensively considering channel capacity, interference, delay and spectrum efficiency indexes, and evaluating each individual in the population; dynamically adjusting parameters of the large-scale pre-training language model and the deep learning network in combination with online learning and a real-time feedback mechanism; adopting a multi-objective optimization and local search mechanism to realize multi-objective optimization of channel selection; and finally, outputting an optimal channel selection scheme. The method provided by the invention has the advantages of strong global optimization capability, high dynamic adaptability, excellent communication quality and high system efficiency, and is suitable for complex and changeable communication environments.

System, method, and instrumentalities are described herein for transmitting information optically. The optical source may be configured to generate a beam. The beam may include a series of light pulses. The beam of light may be modulated. A modulator may be configured to modulate the series of light pulses in response to a data transmission signal, thereby encoding transmission data into the series of light pulses. The modulated beam of light may be received and both amplified and filtered. The filtered beam of light may be transmitted from to a detector having a photoreceiver. The photoreceiver may be configured to extract the transmission data from the filtered beam of light.

The invention discloses a light-weight wide-angle atmosphere laser communication device, system and method based on reverse modulation inertial navigation cooperation, and solves the technical problem that an existing atmosphere laser communication system is large in size and weight. The atmosphere laser communication system comprises at least one active communication device and at least one passive communication device, wherein the active communication device comprises a first main control unit, an optical signal generation modulation unit, a direction adjustment unit, a first optical receiving unit, a first optical signal acquisition unit, a first electric signal processing unit and an aiming unit; the pointing adjustment unit comprises an inertial navigation measurement module and a first MEMS fast reflecting mirror; the passive communication device comprises a second optical receiving unit, a second optical signal acquisition unit, a second electric signal processing unit, a second main control unit and an MRR modulation unit. According to the invention, a scheme of cooperation of light beam pointing compensation and reverse modulation of inertial navigation measurement is adopted, and the problem that the communication field angle, volume and weight of an atmospheric laser communication system are mutually restricted is solved.