50results about How to "Achieve wide coverage" patented technology

The invention relates to the technology of communication, and discloses a differential relay method and device for a global navigation satellite system. According to the invention, the method comprises the steps: enabling a transmission region of a server to be divided into a plurality of grid units, setting at least one differential relay in each grid unit; calculating a difference correction number of each differential relay through the server, and transmitting the position information of each relay and the difference correction numbers to a user terminal, so that the user terminal employs the position information and the difference correction number of the differential relay nearest to the user terminal for differential positioning, thereby facilitating the use of differential services. Moreover, the server can meet the demands of a large number of users only if the server calculates a fixed number of difference correction numbers, thereby improving the coverage and usability of the differential services. In addition, the user terminal does not need to upload the position information of the user terminal to the server, can carry out differential positioning through obtaining the difference correction number of the nearest differential relay according to the position information of each differential relay, and guarantees the crypticity of a user.

The invention provides an Internet of Things tower deformation monitoring device integrating Beidou and an inertial sensor. The device comprises Beidou satellite monitoring point equipment, an Internet of Things sensing monitoring device, a spatial data preprocessing platform, an NB-IoT communication module, a solar cell, a power management module, an input and output panel and a background data monitoring platform. The Beidou satellite monitoring point equipment and the Internet of Things sensing monitoring device are fixed on a monitored pole body, are connected with the spatial data preprocessing platform through the NB-IoT communication module, and are used for automatically measuring tower health states such as tower footing settlement, tower inclination angle and structural wind loadanalysis. The device is good in performance, small in size and low in power consumption, solar energy can be used for supplying power, and unattended long-term automatic monitoring is achieved to themaximum extent in combination with the low-power-consumption monitoring device and the Internet of Things equipment.

The invention provides a long-endurance multi-rotor-wing unmanned aerial vehicle agricultural plant protection method, and relates to unmanned aerial vehicle agricultural plant protection. A long-endurance multi-rotor-wing unmanned aerial vehicle based on a suspension mooring system comprises a power supply, a power-on guide rail, power-on guide rail supporting rods, a conductive slide block, a light and soft wire and a multi-rotor-wing unmanned aerial vehicle body. A plant protection working area is measured; the distribution positions of the power-on guide rail supporting rods are designed according to the area of the working area; the power-on guide rail supporting rods, the power-on guide rail and the conductive slide block are installed; the power supply and the unmanned aerial vehicle are communicated, and the agricultural plant protection work is executed. The conductive slide block can be pulled to slide along the guide rail under the dragging effect of the light and soft wire, a conductive sheet on the conductive slide block and a conductive core wire on the guide rail are in a friction contact state all the time in the sliding process, and the smooth electricity conduction of the conductive slide block and the core wire of the power-on guide rail is ensured. The multi-rotor-wing unmanned aerial vehicle body can work in a long-endurance mode in the agricultural plant protection working area, effective loads can be improved when the unmanned aerial vehicle carries no power supply, and the wide-range coverage of the plant protection working area is achieved.

The invention discloses a bolt vibration signal correction method based on white noise statistical characteristics for correcting vibration signals detected by a bolt vibration detection unit arranged on a tested bolt. The method comprises a first step of carrying out empirical mode decomposition on the vibration signals in which empirical mode decomposition is carried out on the vibration signals detected by the bolt vibration detection unit, and n intrinsic mode function components and a trend term are acquired, a second step of carrying out effectiveness recognition on the intrinsic mode function components in which an intrinsic mode function component effectiveness recognition module is called, and according to a pre-built white noise approximate entropy distribution interval module, effectiveness recognition is carried out on the decomposed n intrinsic mode function components, and a third step of carrying out signal reconstruction in which all recognized effective intrinsic mode function components after empirical mode decomposition is carried out on the vibration signals are used for reconstructing the vibration signals. The method of the invention has the advantages that the step is simple, the design is reasonable, realization is convenient, the use effects are good, the bolt vibration signals can be effectively corrected, and the real vibration state of the bolt can be acquired.

The invention discloses a dynamic tomography system and method for a fully mechanized face near field coal rock under exploiting excitation of coal machine. The system comprises an array information synchronous acquisition device and a near-field coal rock tomography working station; the near-field coal rock tomography working station is connected to the array information synchronous acquisition device. The excitation source for vibration is a coal machine. The array information synchronous acquisition device comprises an exploiting position detection unit and two anchor rod vibration detection arrays that are uniformly arranged in a mining roadway. The system is simple in structure and reasonable in design. The system is also convenient to install and operate and is good in using effect. Taking a coal machine as an excitation source, the system makes good images. The invention further discloses a dynamic tomography method for a coal rock near a fully mechanized face under exploiting excitation of a coal machine; the method comprises following steps: 1) the anchor rod vibration detection units and the exploiting position detection units are deployed; 2) dynamic tomography for a coal rock near a fully mechanized face is done under an exploiting excitation of a coal machine. Such a method can be done with a few steps. Reasonably designed, the method can also be done very conveniently to provide dynamic chromatography imaging conveniently and quickly.

The embodiment of the invention provides customer front-end equipment, an antenna control method and a computer readable storage medium, wherein the client front-end equipment comprises a millimeter wave antenna, a radio frequency circuit, a driving module and a processor, and the processor is configured to divide a range scanned by rotation of the millimeter wave antenna into a plurality of blocks and construct an interval stepping strategy based on the plurality of blocks; controlling the driving module to drive the millimeter wave antenna to rotate based on an interval stepping strategy soas to scan the plurality of blocks at intervals; obtaining network information of antenna signals measured by the millimeter wave antenna under the plurality of blocks; determining a target block of the millimeter wave antenna according to the measured multiple pieces of network information, the millimeter wave antenna is controlled to rotate to the target block, the radiation direction of the millimeter wave antenna is automatically adjusted, the alignment efficiency and the communication quality can be improved, the number of the millimeter wave antennas can be reduced, large-range coveragecan be realized by using only one millimeter wave antenna, and the cost is reduced.

The invention discloses a small-size dual-frequency single-fed omnidirectional antenna; a 2.4G narrow metal radiation arm and a 5G wide metal radiation arm on the same side are combined together to jointly form a radiation arm of the dual-frequency single-fed omnidirectional antenna, wherein the middle of the 2.4G narrow metal radiation arm is connected with a right-angle bending type curved branch in series, and a gap is pre-arranged between the two antenna radiation arms; the two antenna radiation arms adjacent to the gap are provided with feed bonding pads which are used as respective inputports and are connected with an inner conductor and an outer conductor of a coaxial cable respectively; a long and narrow short-circuit branch forms a 180-degree phase inverter, wherein the phase inverter is placed at the feed position of the antenna radiation arms; and the two ends of the phase inverter are connected with the two antenna radiation arms respectively, and are used for realizing relatively high balanced feeding of the two antenna radiation arms. The antenna is small in overall size and compact in feeding mode, so that the requirement for impedance matching in the bandwidth of the antenna and the high-integration-level application of multiple antennas can be met; and the antenna can be flexibly hidden inside a product, so that the attractive ID design and high omnidirectional coverage are realized.

The invention provides a curtain wall cleaner and belongs to the technical field of cleaning equipment. The cleaner comprises a shell, a loading disc, a distributor, a rotary mechanism, a lifting mechanism, nozzles and two sensors, wherein the loading disc, the distributor, the rotary mechanism, the lifting mechanism, the nozzle and the two sensors are arranged in the shell. The periphery of the loading disc is connected with the nozzles installed on the distributor, the loading disc is connected with the end of a guide rod of the lifting mechanism, and the lifting mechanism penetrates through, is connected to the distributor and is installed on a rotary plate of the rotary mechanism through an installation plate. The distributor is connected with the nozzles and a water pump through pipelines, the two sensors are symmetrically arranged on the inner periphery of a bearing base of the rotary mechanism through an installation frame, the two sensors are connected with rotary motors of the rotary mechanism respectively to detect support signals on the shell and control the rotary motors to rotate forwards and reversely. Water can be sprayed at multiple points at the same time in the circumferential direction, ascending, descending and rotating of a machine body and swinging of the nozzles can be achieved at the same time, the angle of the nozzles can be adjusted freely in the elevation 40-degree conical range, ascending, descending and rotating in the reciprocating mode can be conducted according to setting, speed and frequency can be adjusted, and adaptability is wide.

The invention discloses a processing method and device for a three-dimensional map. The processing method comprises the following steps of obtaining multiple groups of image data obtained by shooting a target area, wherein resolutions of images represented by each group of image data in the multiple groups of image data are different, and each group of image data is used for representing a plurality of images; obtaining image description information of each image represented by multiple groups of image data according to a merging result of multiple groups of image data; and generating the three-dimensional map of the target area based on the image description information of each image and the multiple groups of image data, wherein the three-dimensional map of the target area includes map information corresponding to the images with the different resolutions, which are represented by multiple groups of image data. Through the method and the device, a problem that the existing technology cannot give consideration to both modelling range and modelling precision of a three-dimensional electronic map is solved, and an effect of large-scale high-precision modelling is realized.

This invention provides a communicating method based on a SCDMA microwave repeater including: in a down link, a near-end computer picks up down-line signals of the subsystem of a transceiver of the SCDMA base station via a coupler, processes and transmits them to a far-end computer by microwaves, which receives the signals and recovers them to be emitted by a re-sending antenna, in an up link, a remote computer receives up signals sent by the re-sending antenna and processes then transmits them to the near-end computer by microwaves, which recovers the received up signals and then transmits them to the subsystem of the SCDMA base station transceiver.

The present invention provides an antenna assembly and an electronic device. The antenna assembly comprises a guiding component, a plurality of radiators, a plurality of feeding sources, and a drivingmechanism; the plurality of radiators are slidably disposed on the guiding component at intervals; each of the radiators is electrically connected to at least one of the feeding sources; the drivingmechanism is connected with the radiators and the guiding component; and the driving mechanism is used for driving the radiators to move along the guiding component, so that a distance between two adjacent radiators can be changed. The distances between the adjacent radiators are adjusted, so that the maximum radiation directions of the radiators can be adjusted, and therefore, the scanning of antenna beams can be realized, and the wide coverage of the high-gain antenna can be realized, and at the same time, the plurality of radiators slide on the guiding component, and do not occupy a largerthree-dimensional space; and a large number of phase shifters are not needed, and therefore, costs can be saved.

The invention discloses a power transmission line image and point cloud data fusion method and system. The method comprises the following steps: acquiring an optical image and point cloud data of a target power transmission line; performing image processing on the point cloud data to obtain a point cloud image; in response to user operation, image feature points are selected from the optical image, point cloud feature points corresponding to the image feature points are selected from the point cloud image, and the point cloud feature points correspond to space coordinates of point cloud data; marking the image feature points and the corresponding point cloud feature points and establishing a mapping relation to form a reference data pair; constructing a coordinate conversion relation between the optical image and the point cloud data according to the reference data pair, and obtaining a corresponding relation between each pixel coordinate in the optical image and a space coordinate of a point cloud in the point cloud data based on the coordinate conversion relation; according to the method, the point cloud data and the feature data can be fused to obtain data with spatial position information.

The invention provides an integrated system of an annular visual field, wherein a common main optical system, and independent subsequent elements and receiving devices are utilized, and three independent modules, namely a high-resolution imaging module, a multibeam laser echo detecting module and an atmosphere echo detecting module. The high-resolution imaging module realizes a visible light multispectral high-resolution imaging function. The multibeam laser echo detecting module realizes a five-beam laser echo receiving function. The atmosphere echo detecting module realizes an atmosphere echo receiving function. Three channels form the annular visual field through reasonable laying. The optical system according to the invention has advantages of high ray machine structure integration degree, high resolution, small size, small weight, etc. Furthermore the integrated system realizes functions of high resolution and high-precision distance measuring to large-area ground objects, cloud aerosol detection and three-dimensional plotting.

The invention discloses a method and system for filtering repeated data, the method comprises the following steps acquiring a sequence identifier of received data by a receiving end; determining whether the sequence identifier is a received sequence identifier or not by the receiving end; if yes, discarding the data; otherwise, receiving the data, and taking the received sequence identifier as a received sequence identifier. Compared with the prior art, according to the technical scheme, the repeated frame is filtered, and the problem that information cannot be repeatedly received can be solved simply according to the needs when the gateway is added. The method has the advantages that the whole network structure is simplified, and information is not required to be transmitted by the nodes;the coverage range of a signal is increased, only a gateway device needs to be simply added, and a large range of signal coverage can be quickly realized; the node equipment can be switched freely and seamlessly in the coverage area of the gateway.

The invention provides a device for simulating wind load in a ship model test. The device includes a closed-loop servo system module and an automatic control module, wherein the closed-loop servo system module and the automatic control module are arranged on a ship model, the closed-loop servo system module includes a deep immersion full-revolving propeller and a deep immersion side-thrust propeller, and the automatic control module includes a six-degree-of-freedom optical motion measuring device, a thrust distribution module, a wind load database and a thrust-rotation speed curve storage unit. According to the six-degree-of-freedom optical motion measuring device, the wind load database is queried through a thrust-rotation speed curve stored in the thrust-rotation speed curve storage unit according to ship speed, heading angle and set wind speed, so that wind load borne by the ship model can be obtained, and therefore, the thrusts and angles of the deep immersion full-revolving propeller and the deep immersion side-thrust propeller can be obtained through the calculation of the thrust distribution module. With the device of the invention adopted, wide range coverage of a wind field can be realized, and the problems of unevenness and attenuation caused by traditional wind making can be solved.

The invention provides an experimental device using deep-immersion propellers to simulate the current load. The experimental device comprises a closed-loop servo system module and an automatic control module, and both the closed-loop servo system module and the automatic control module are arranged on a ship model; the closed-loop servo system module comprises a deep-immersion full-revolution propeller and a deep-immersion side push propeller; the automatic control module comprises a six-freedom optical movement measuring device, a thrust distribution module, a current load database and a thrust and rotating speed curve storage unit; and according to the ship speed, the heading angle and the set current speed, the six-freedom optical movement measuring device searches the current load database for the current load of the ship model via a thrust and rotating speed curve stored in the thrust and rotating speed curve storage unit, and the thrust distribution model calculates the thrust and angle of the deep-immersion full-revolution propeller and the deep-immersion side push propeller. The experimental device can realize large-scale coverage of the flow field, and solves the problems of non-uniformity and attenuation of traditional current generation.

The embodiment of the invention discloses a method and a device for a reverse access channel to detect signals. The method and the device can improve the detecting performance of the reverse access channel under the condition that time delay is larger than cyclic prefix, and realize wide coverage of a base station. The method comprises the following steps: fetching the present OFDM symbol and an OFDM symbol next to the present OFDM symbol; determining the ergodic interval of the time delay Deltat; taking the part of cycle length Ts minus Deltat from the present OFDM symbol from behind; taking the part of time delay Deltat from the OFDM symbol following the present OFDM symbol from the front; splicing the two parts into a new OFDM symbol; and circulating the time delay Deltat in the determined ergodic interval and detecting each spliced OFDM symbol to obtain each detection value of the base station in the ergodic interval. The method and the device can be applied to the ultra mobile broadband (UMB) system.

The invention belongs to the technical field of frequency synthesis and relates to a device for implementing a parallel DDS with wide coverage. The device utilizes parallel internal structure and comprises two phase accumulators, two sine look-up table ROMs, a selector, a DAC, and a LPF module. A frequency control word is simultaneously input into the phase accumulator A and the phase accumulator B. The outputs of the two phase accumulators are output to the sine look-up table ROMs to look up tables separately. Binary amplitude sequences output by the two sine look-up table ROMs are output to the one-out-of-two data selector and then are output in an interlaced way under the control of a clock. The operating reference clock frequency of the phase accumulators, the sine look-up table ROMs, and the selector is fc. Two signals are combined by the selector and then are output to the DAC. The reference clock frequency of the DAC is 2fc. The parallel DDS may effectively expand the output bandwidth of the DDS.

The present application provides an antenna assembly and electronic equipment. The antenna assembly includes: a guide; a plurality of radiators, the plurality of radiators are slidably arranged on the guide; a plurality of feed sources , each of the radiators is electrically connected to at least one of the feed sources; and a driving mechanism, the driving mechanism is connected to the radiator and the guide, and the driving mechanism is used to drive the radiator along the guide sliding parts to change the distance between two adjacent radiators. By adjusting the distance between adjacent radiators, the maximum radiation direction of the radiator can be adjusted to realize the scanning of the antenna beam, thereby realizing the wide coverage of the high-gain antenna. At the same time, multiple radiators slide on the guide without occupying In a larger three-dimensional space, there is no need to set up a large number of phase shifters, which saves costs.

The invention relates to an aircraft ad hoc network method based on same-time same-frequency full duplex, and the method comprises the steps: installing a crystal oscillator clock circuit which is used for providing clock pulses on all to-be-networked aircrafts, enabling one aircraft to be called as a node, and carrying out the initialization; in the flight process of the aircraft, dynamic management of cluster heads and clusters in the ad hoc network is carried out, and dynamic access of nodes to the clusters is completed; on a public broadcast channel f0CN, the working state of a cluster head node is detected in real time, whether the cluster head is damaged or not is judged, and if the cluster head is damaged, a new cluster head is selected, and a cluster structure is updated; detecting whether routing failure and link interruption occur or not on a public broadcast channel f0CJ of inter-cluster communication, if the routing failure or the link interruption occurs, updating a routing table and a network topology, and effectively establishing a communication path; according to service requirements, whether communication is in-cluster communication or inter-cluster communication is judged, resources allocated to each node, channels used by the nodes and access protocols are determined, and it is ensured that in-cluster node information can be shared in real time and inter-cluster node information can be shared in a wide area.

The embodiment of the invention discloses a virtual fitting method and device. The specific technical scheme comprises the steps of receiving a clothes try-on request; the figure index data of the user is obtained, and a model image of the garment requested by the user to try on is determined, and the model image comprises a model of the garment; calculating the proportion of the figure index data of the user and the figure index data of the model, and converting the size information of each figure index of the model in the model image by using the calculated proportion information to obtain the target size information of each figure index; according to the target size information, performing affine transformation on a human body contour part obtained by matting the model image; and performing synthesis processing on the human body contour part obtained after affine transformation and an image background obtained by matting the model image to obtain a fitting image of the user.

The invention discloses a processing method and device for a three-dimensional map. The processing method comprises the following steps of obtaining multiple groups of image data obtained by shooting a target area, wherein resolutions of images represented by each group of image data in the multiple groups of image data are different, and each group of image data is used for representing a plurality of images; obtaining image description information of each image represented by multiple groups of image data according to a merging result of multiple groups of image data; and generating the three-dimensional map of the target area based on the image description information of each image and the multiple groups of image data, wherein the three-dimensional map of the target area includes map information corresponding to the images with the different resolutions, which are represented by multiple groups of image data. Through the method and the device, a problem that the existing technology cannot give consideration to both modelling range and modelling precision of a three-dimensional electronic map is solved, and an effect of large-scale high-precision modelling is realized.

The invention provides a device for simulating the wind current load in a ship model test. The device comprises a closed-loop servo system module and an automatic control module, wherein the closed-loop servo system module and the automatic control module are arranged on a ship model; the closed-loop servo system module comprises a deep-immersion full-swiveling propeller and a deep-immersion lateral-pushing propeller; the automatic control module comprises a six-degree-of-freedom optical motion measurement device, a thrust distribution module, a wind current load database and a thrust-rotating speed curve storage unit; and the six-degree-of-freedom optical motion measurement device is arranged for querying the wind current load database by virtue of a thrust-rotating speed curve stored in the thrust-rotating speed curve storage unit according to a ship speed, a heading angle, a set wind speed and a set flow rate so as to obtain the wind current load on the ship model, thereby calculating thrusts and angles of the deep-immersion full-swiveling propeller and the deep-immersion lateral-pushing propeller by virtue of the thrust distribution module. The device provided by the invention can realize large-scale coverage of a wind field and a flow field, and the problems that the traditional wind generation and flow generation are non-uniform and attenuated are solved.

The invention provides an emergency broadcast method based on an unmanned aerial vehicle, which comprises the following steps: an emergency broadcast platform transmits an emergency broadcast messageto an adapter; a transmitting device transmits a broadcast television signal containing the emergency broadcast message; a receiving device of the unmanned aerial vehicle obtains the emergency broadcast message; the transmitting device of the unmanned aerial vehicle performs local broadcast television signal coverage; a local emergency broadcast receiving terminal receives the broadcast televisionsignal containing the emergency broadcast message and obtains the emergency broadcast message, and outputs audio and video broadcast; and a wireless local area network pushes or plays the audio and video broadcast on demand. According to the emergency broadcast method based on the unmanned aerial vehicle, when a local wireless network and local broadcasting are interrupted, emergency broadcastingis conducted, rescue information is issued, the coverage area is large, stable broadcasting is kept, and complete receiving can be achieved on the ground.

The invention provides a curtain wall cleaner and belongs to the technical field of cleaning equipment. The cleaner comprises a shell, a loading disc, a distributor, a rotary mechanism, a lifting mechanism, nozzles and two sensors, wherein the loading disc, the distributor, the rotary mechanism, the lifting mechanism, the nozzle and the two sensors are arranged in the shell. The periphery of the loading disc is connected with the nozzles installed on the distributor, the loading disc is connected with the end of a guide rod of the lifting mechanism, and the lifting mechanism penetrates through, is connected to the distributor and is installed on a rotary plate of the rotary mechanism through an installation plate. The distributor is connected with the nozzles and a water pump through pipelines, the two sensors are symmetrically arranged on the inner periphery of a bearing base of the rotary mechanism through an installation frame, the two sensors are connected with rotary motors of the rotary mechanism respectively to detect support signals on the shell and control the rotary motors to rotate forwards and reversely. Water can be sprayed at multiple points at the same time in the circumferential direction, ascending, descending and rotating of a machine body and swinging of the nozzles can be achieved at the same time, the angle of the nozzles can be adjusted freely in the elevation 40-degree conical range, ascending, descending and rotating in the reciprocating mode can be conducted according to setting, speed and frequency can be adjusted, and adaptability is wide.

The invention relates to an Internet of Things base station, a data return processing system and a data return processing method. The Internet of Things base station comprises a main control module, a wired return module and a wireless return module; the main control module is used for determining whether to execute a switching action between the wired backhaul module and the wireless backhaul module or not according to a current communication link state; the wireless return module is used for carrying out data interaction with a mobile communication base station under the control of the main control module and carrying out format conversion on currently acquired data according to a current communication type; wherein the communication type comprises uplink communication between an Internet of Things terminal and the Internet of Things base station, or downlink communication between the Internet of Things terminal and the Internet of Things base station; and the wired return module is used for carrying out data interaction with a core network of the Internet of Things under the control of the main control module. By adopting the Internet of Things base station, the deployment cost of the Internet of Things base station can be reduced.