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 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.

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 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 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 discloses a hazardous chemical gas monitoring method based on an NB-IOT technology. The method comprises the following steps: collecting concentration data, pressure data and image data of hazardous chemical gas; establishing a data transceiving model of the NB-IoT equipment; establishing a position equation of the hazardous chemical gas pipeline by utilizing the longitude and the latitude; establishing a model by using a whale optimization algorithm to predict a dangerous chemical gas leakage source and search the leakage source; establishing a concentration change establishment model; establishing a hazardous chemical gas pressure change model by using a thermodynamic theory of gas; carrying out resolution adjustment and decoding on the dangerous chemical gas image; establishing a hazardous chemical gas leakage similarity function, and positioning a leakage source; and calculating a signal receiving power difference value of the NB-IOT equipment, and transmitting the data to the model to complete monitoring of the hazardous chemical gas. The method is easy to understand and high in operability, the leakage problem of the hazardous chemical gas in pipeline transmission is effectively monitored, wide coverage is achieved, and the safety of the hazardous chemical gas in transmission is guaranteed.

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 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 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 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.