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

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 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 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 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 belongs to the technical field of indoor positioning, and discloses an audio positioning method based on emission angle estimation. At least two base stations with known position information and attitude information are arranged, and each base station is equipped with an array of sound source emitters. The array includes several sound source transmitters that transmit sound signals in different directions; each base station continuously transmits sound signals with identification codes through the sound source transmitters, and the identification codes of the sound signals emitted by different sound source transmitters are uniquely determined and Different from each other; the receiving end receives all sound signals from all base stations, and demodulates the sound signals to obtain the angular probability distribution between the receiving end and the base station; according to the angular probability distribution, the best spatial estimation corresponding to the receiving end and each base station is obtained Angle: According to the best spatial estimation angle in the base station coordinate system, the position information and attitude information of the base station, the spatial position of the receiving end is obtained. The invention solves the problem of low accuracy of indoor positioning.

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.