261 results about "Positive direction" patented technology

The invention discloses a fabric draping form three-dimensional quantification method, and belongs to the technical field of fabric draping form quantification, and the method comprises the steps: carrying out the three-dimensional scanning of a fabric sample, constructing a draping three-dimensional model of the fabric sample, determining the maximum dissectable distance of the draping three-dimensional model, selecting the sectioning step length, and calculating the number of sectioning layers. Determining the number of horizontal section cutting planes parallel to the horizontal reference plane, and dividing the three-dimensional suspension model into a plurality of suspension sub-models along the positive direction of the normal axis; calculating an orthogonal projection area and an orthogonal projection contour perimeter of each suspension sub-model on a horizontal reference plane according to the coordinates of all surface vertexes of each suspension sub-model, and further calculating a layered suspension index of each suspension sub-model; and taking the arithmetic mean value of the layered drape indexes of the drape sub-models as a drape index for quantifying the drape form of the fabric sample. According to the method, the problems of dimension deficiency and insufficient quantization precision in the prior art can be solved, and fine quantization of the drape form is realized.

The embodiment of the invention provides a zero point learning method and device for a braking system, and relates to the technical field of motor control, and the method comprises the steps: obtaining a starting signal of braking voltage buildup zero point learning, the starting signal of braking voltage buildup zero point learning being generated based on vehicle power-on or vehicle power-off; the motor controls the piston to move forward from a target position by adopting a set moving method, the forward direction is the direction of the brake disc relative to the piston, and the set moving method is used for controlling the speed change of the piston; in the moving process, motor movement data of the motor are collected, real-time change data of the motor movement data are analyzed, if the real-time change data meet the set movement condition, the current position data, corresponding to the real-time change data, of the piston serves as the braking zero point, and the set movement condition is that when the motor passes through the braking zero point in the movement process, the current position data of the piston is changed into the braking zero point. The generated empirical data is obtained. According to the method, zero point learning and correction can be flexibly and conveniently carried out, and the driving safety is improved.

The invention discloses a three-axis differential implementation method based on cross symmetry of double inertial sensors, and the method comprises the following steps: S1, a sensor is an MEMS inertial measurement unit, i.e., an IMU, the IMU uses a right-hand Cartesian coordinate system to define the directions of three sensitive axes of the IMU, and the IMU is used for defining the positive direction of an angular velocity and also used for defining the positive direction of a linear acceleration; s2, in order to realize three-axis difference, rotating the sensor around the y axis by 180 degrees; s3, a result obtained in the step S2 is rotated by 90 degrees around the z axis; and S4, after the step S3, realizing symmetry of the x axis and the y axis through crossing, and realizing three-axis difference through double IMUs by applying a three-axis symmetry principle of an inertial sensor.

The invention provides a non-orthogonal tilt-rotor aircraft and a flight control method thereof, a tilt shaft at the lower end of a tilt nacelle is obliquely arranged, and the tilt shaft is parallel to an XZ plane, forms an angle of 45 degrees with an X axis and a Z axis, and is not orthogonal to an XY plane and a YZ plane of a fuselage coordinate system; the positive direction of the X axis is backward along the course, the positive direction of the Y axis is rightward along the course, and the positive direction of the Z axis is upward along the vertical direction. According to the invention, the transverse stability augmentation effect can be provided, the transverse stability is improved, and the problem of unstable pitching of the fuselage caused by tilting of the rotor nacelles can be avoided.

The invention discloses a conjugate differential interference self-correction method for a large-size plane variable-pitch grating, and belongs to the technical field of optical measurement, and the method comprises the steps: enabling the variable-pitch grating to be in a Littrow auto-collimation state, and measuring the positive and negative first-order diffraction wavefront of the variable-pitch grating through a laser topography interferometer; performing differential operation on the positive and negative first-order diffraction wavefronts; moving the variable-pitch grating by a displacement alpha along the positive direction of the X axis, measuring positive and negative first-order diffraction wavefronts at the moment, and performing differential operation; moving the variable-pitch grating by a displacement alpha along the negative direction of the X axis, measuring positive and negative first-order diffraction wavefronts at the moment, and performing differential operation to obtain a second displacement differential wavefront; and performing interference pseudo-shearing operation by using the initial differential wavefront, the first displacement differential wavefront and the second displacement differential wavefront, and solving a variable pitch parameter by using a least square method. According to the invention, the measurement efficiency and precision of the large-size planar two-dimensional variable-spacing grating are obviously improved.

The embodiment of the application discloses a kind of construction method and simulation equipment of simulating traffic flow, it can be applied to the field of automatic driving simulation test, the method comprises: first, for different simulation test purposes, the traffic scene library that meets the test demand is constructed in positive direction, the number of each traffic scene file in traffic scene library, the proportion of traffic scene file belonging to different traffic scene type can be customized, high flexibility, compared with collecting real traffic flow data, without labeling, low cost, easy to obtain, and consider comprehensive, not limited by the collection data, can guarantee test completeness;Second, simulation equipment reads traffic scene file from traffic scene library in turn, and controls simulation vehicle to transition from the initial state of last scene to the terminal state of current scene, realize the continuous distribution of different simulation scenes, so that the simulation traffic flow generated can cover the test part of different scene continuous switching;Finally, for each simulation scene, the corresponding test result is generated in real time, high efficiency.

A spacecraft thruster distribution and pulse width modulation method based on a dynamic inverse matrix comprises the following steps: calculating a torque matrix generated by each thruster in combination with the installation position, the thrust size and the thrust direction of the thruster; the control direction of each thruster is determined, and grouping is carried out according to the control directions of the thrusters; a thruster for controlling the three-axis positive direction is pre-selected, a torque matrix corresponding to the pre-selected three-axis positive axial thruster is generated, and the air injection pulse width duration of the three axes is calculated in combination with instruction control torque; according to the calculated symbol of the three-axis jet pulse width duration, reselecting a thruster, and obtaining a dynamic torque matrix of the reselected thruster; according to the instruction torque sent by the upper computer and the dynamic torque matrix of the reselected thrusters, the jet pulse width duration of each thruster is calculated based on a matrix inversion algorithm; the thruster pulse width modulation method is designed on the basis of considering the coupling influence of the three axes of the thruster, and can adapt to the large-range change of the mass center of the aircraft.

This invention provides a target contour extraction method, system, device, and storage medium, relating to the field of image processing technology. The target contour extraction method includes: acquiring a target image and processing it to obtain a region of interest (ROI); within the ROI, processing to obtain the gradient of pixels and the intensity and orientation fields of the gradients; extracting multiple starting points based on the intensity and orientation fields of the pixels; processing multiple contour points based on the starting points; and obtaining the target contour of the target image based on the contour points. This invention effectively avoids the problem in existing methods of failing to achieve good contour detection results without prior geometric constraints. It also considers three diagonally opposite pixels in the gradient's vertical direction, three pixels in the gradient's positive direction, and three pixels in the gradient's negative direction, resulting in a more accurate extracted image contour and greater flexibility and adaptability in use.

The invention belongs to the technical field of feeding equipment, and discloses a feeding device for a tobacco packaging machine, and the feeding device for the tobacco packaging machine comprises a feeding mechanism, a separating mechanism, a carrying mechanism, a reversing mechanism and a detecting mechanism. According to the feeding device for the tobacco packaging machine, the working procedure of manually carrying the material boxes is replaced by grabbing the material boxes through the feeding mechanism, the labor intensity of workers is remarkably reduced, meanwhile, efficiency loss caused by cooperation of multiple persons is avoided, and the feeding speed is greatly increased. And secondly, through cooperative operation of the separation mechanism, the reversing mechanism and the detection mechanism, accurate adjustment of the materials in the positive direction and the negative direction and distribution of the first feeding channel and the second feeding channel of the machining equipment are achieved, common omissions such as reverse loading and inverted loading of the materials in manual operation can be eradicated, and the stability of the follow-up automatic packaging process and the product quality are ensured. In addition, manual intervention is reduced through the automatic process, and management chaos caused by manual operation on site is avoided.

The present application relates to the technical field of downhole management, and particularly discloses a coal mine downhole anti-collision personnel management system, which is used to solve the problem of weak prevention ability of personnel management in coal mine downhole accidents; the present application sets the positioning base station installed at the entrance of the impact area as the first positioning base station, the positioning base station installed at the end of the impact area as the second positioning base station, and the positioning base station installed at the exit of the impact area as the third positioning base station by acquiring the positioning information of the personnel, sets the distance path between the first positioning base station and the second positioning base station as the first path, sets the direction of the first positioning base station towards the second positioning base station in the first path as the first positive direction, and sets the direction of the second positioning base station towards the first positioning base station in the first path as the first negative direction, compares the positioning information of adjacent time points to determine the movement direction of the personnel in the first path, realizes dynamic monitoring, and ensures instant grasp of the personnel flow direction and state.

The invention discloses a method and equipment for improving matching of a measured piece in an attenuation measurement system, belongs to the field of radio metering, and comprises the method for improving matching of the measured piece in the attenuation measurement system, and the core of the method is that a precise matching absorption load is added in a front-end transmission system of the measured piece; energy transmission is realized on a waveguide wide side of the precise matching absorption load through a coupling hole; a transmission waveguide is additionally arranged above the coupling hole, and energy is transmitted to a measured piece in the forward direction; and a precise matching absorption load is added in the reverse direction to absorb energy in the reverse direction, so that the measured piece matching improvement equipment in the attenuation measurement system is formed, and finally the measured piece matching of the attenuation measurement system is improved. According to the method and the equipment, the impedance matching of the measured piece is improved by using the precise matching load, the voltage standing-wave ratio of the load level is realized, and the attenuation measurement accuracy is improved. The tested piece matching improvement equipment developed by using the method is directly connected to two ends of the tested piece in an attenuation measurement system, so that the impedance matching of the tested piece is improved.

The utility model relates to the technical field of camera shooting, and specifically provides a camera shooting module comprising a circuit board; the photosensitive part is arranged on the circuit board; the bracket is arranged on the circuit board and is provided with a light hole; the lens base is arranged on one side, deviating from the circuit board, of the bracket; the lens is arranged in the lens base; and the first bonding piece is connected between the lens base and the lens. Wherein the lens, the light hole and the photosensitive member are sequentially and correspondingly arranged along the optical axis direction of the lens, the thermal expansion coefficient of the lens seat along the optical axis direction of the lens is at least, and the thermal expansion coefficient of the lens seat along the direction perpendicular to the optical axis direction of the lens is at least. According to the camera module, the thermal expansion coefficient of the lens base is reasonably configured, so that the back focal length variation of the lens caused by temperature change can be effectively and positively compensated, the adverse effect of the variation on the overall performance of the camera module is reduced, and the imaging quality of the camera module is favorably improved. The utility model further provides electronic equipment comprising a shell and the camera module.

The application relates to a cap screwing device, which comprises a mounting base, a driven shaft, a servo motor and a gas claw, the bottom of the mounting base is mounted on a moving platform, the servo motor is mounted on a first circular hole, the output shaft of the servo motor is connected with a driven wheel above through a gear, the head end boss of the driven shaft along the negative direction of the X axis is embedded into the positioning hole of the gas claw and locked with the gas claw through a long screw, and the side along the positive direction of the X axis of the driven shaft is inserted into the inner circular hole of a rotating shaft sleeve and passes out from the side along the positive direction of the X axis of the rotating shaft sleeve. The cap is stably screwed on the required product through the servo motor, the gear, the rotating shaft sleeve, the driven shaft and the gas claw, the driven shaft adopts a hollow design, a rotating quick-change joint is mounted at the bottom, the upper end is connected with the gas claw for air supply through a gas pipe joint, so that the winding of the gas pipe on the driven shaft is avoided, and the accuracy and stability of the cap screwing device are improved.

The utility model discloses a low damping pulsation electromagnetic pump, including pump shell, pump core, solenoid and elastic reset piece, the solenoid is sleeved in the outside of pump shell, be equipped with the water passageway and be equipped with the water inlet and the water outlet of water passageway both ends in the pump shell, the pump core is under the action of the magnetic field of solenoid and the elastic reset piece and reciprocates in the water passageway, be equipped with the Tesla valve flow channel in the pump core, the both ends of Tesla valve flow channel have positive and negative direction mouth, the positive direction mouth is linked together with the water inlet, the negative direction mouth is linked together with the water outlet. The utility model discloses an electromagnetic pump, still guarantee electromagnetic pump to have the water pumping capacity and the effect of accelerating and pressurizing to water flow under the condition of not using check valve, because of not having check valve, the water pressure loss is smaller. In addition, the utility model discloses a kind of intelligent closestool using above-mentioned low damping pulsation electromagnetic pump.

The utility model relates to a temporary storage carrying device which comprises a moving mechanism capable of moving to different places. The conveying mechanism is mounted on the moving mechanism, a buffer space is formed above the conveying mechanism, and the conveying mechanism is used for bearing materials and driving the materials to translate in the X-axis direction; the movable stop mechanism comprises a driving device and a stop piece, the driving device drives the stop piece to move between a stop position and a release position, when the stop piece is located at the stop position, the stop piece is located on the X-axis positive direction side of the buffer space, and the stop piece is at least in contact with the gravity center of the material in the buffer space or the position higher than the gravity center; when the stop piece is located at the release position, the stop piece leaves the X-axis positive direction side of the buffer space. Under various working conditions, the material falling or toppling problem can be prevented when a robot carries materials, economic losses are avoided, the influence on the production schedule and the product quality is prevented, and the reliability and the stability of the whole production process are guaranteed.

The present invention provides a tire having comprehensive advantages in wet road grip performance, dry road grip performance, control performance and wear resistance. The tire tread comprises: a first main groove (38) located on the back side of the tire's equatorial plane (CL) and extending in the circumferential direction and having a zigzag shape; a second main groove (40) located on the back side of the equatorial plane (CL) and on the front side of the first main groove (38) and extending in the circumferential direction and having a zigzag shape; a plurality of first lateral grooves (48) each inclined in the negative direction relative to the axial direction of the tire and separated from the first main groove (38) and the second main groove (40); and a plurality of second lateral grooves (50) each inclined in the positive direction relative to the axial direction and separated from the first main groove (38) and the second main groove (40).

The utility model provides a lubricating oil barrel reversing mechanism which is used for being arranged at a reversing station. The conveying line extends to the reversing station from the upstream station and continues to extend to the downstream station. The lubricating oil barrel reversing mechanism comprises a support, and the support is installed on the rack. A reversing motor is arranged on the support, a rotating shaft of the reversing motor is downwards connected with a steering piece, and the two sides of the steering piece are each connected with a reversing plate. Reversing plates on the two sides of the steering part are located on the two sides of the conveying line correspondingly; the upstream of the support and the two sides of the conveying line are each provided with a belt type speed reducing mechanism. A surrounding type damping belt is arranged on each belt type speed reducing mechanism; the inner side of a damping belt on the belt type speed reducing mechanism is used for being attached to a lubricating oil barrel passing through the conveying line. And a photoelectric sensor is arranged between the reversing plate and the belt type speed reducing mechanism. According to the utility model, the forward lubricating oil barrels and the reverse lubricating oil barrels on the conveying line can be sequentially arranged at intervals.

The embodiment of the present invention discloses a method, device, computer equipment and storage medium for detecting abnormal ship trajectories. The method includes: obtaining ship AIS data to obtain AIS data to be detected; obtaining longitude and latitude; calculating the angle between two movement directions and the positive direction of the x-axis; calculating the difference between the angle between two movement directions and the positive direction of the x-axis to obtain the trajectory angle; screening the trajectory point indexes that meet the requirements and retaining them in a list; grouping the list to obtain a grouping result; generating three different types of trajectories with different lengths according to the characteristics of S-type trajectories, O-type trajectories and irregular trajectories to obtain abnormal trajectories; using the DTW algorithm to standardize the grouping results and the three abnormal trajectories, then rotating the abnormal trajectories at different angles and calculating the minimum path value; determining the abnormal type to which the grouping result belongs. By implementing the method of the embodiment of the present invention, it is possible to achieve classification detection of abnormal trajectories, with high detection reliability and low time consumption.

An inductor component includes a blank, a second interlayer insulating layer (33), and an inductor wiring (50). The blank has a first main surface and contains a magnetic material. The second interlayer insulating layer (33) extends in parallel with the first main surface within the blank and is flat. The inductor wiring (50) is in contact with a surface in the second interlayer insulating layer (33) that is parallel with the first main surface. A direction from the inductor wiring (50) side toward the second interlayer insulating layer (33) side in a direction orthogonal to the first main surface is defined as a first positive direction (X1), and a direction opposite to the first positive direction (X1) is defined as a first negative direction (X2). A surface of an outer surface of the second interlayer insulating layer (33) that faces a direction parallel with the first main surface is defined as an end surface (ED). In a certain cross section orthogonal to a center line of the inductor wiring (50), the entire end surface (ED) is an inclined surface that faces the direction parallel with the first main surface and the first negative direction (X2), or the entire end surface (ED) is an inclined surface that faces the direction parallel with the first main surface and the first positive direction (X1).

The utility model provides welding equipment which comprises a base assembly, two clamping assemblies, a sliding frame assembly, a welding gun assembly, an image collecting assembly and a control module. The two clamping assemblies are respectively used for rotatably clamping two to-be-welded parts and are close to each other or far away from each other through the base assembly, the sliding frame assembly is arranged between the two clamping assemblies, the welding gun assembly is rotatably arranged on the sliding frame assembly and moves towards a second direction and a third direction through the sliding frame assembly, and the image acquisition assembly is arranged between the two clamping assemblies; according to the welding equipment, the control module controls the base assembly and the two clamping assemblies to enable the welding openings of the two to-be-welded parts to be aligned, and the butt joint efficiency is improved; and the welding gun is controlled to move to one side of the welding opening for precise automatic welding, manual monitoring is not needed, the safety coefficient of welding operation is improved, and the welding precision is guaranteed.

The application discloses a control method for slab positioning in a heating furnace. Three laser range finders are arranged in sequence along the positive direction of a furnace roller way on the same side of a pusher. The deceleration control process of the furnace roller way is started by the detection signal of the first laser range finder, and the automatic positioning of the slab is realized by the detection signals of the second and third laser range finders. The method can achieve the same positioning precision for cold slabs and bent slabs as for hot slabs, thereby avoiding the phenomenon of scraping the burner of the furnace wall, shortening the slab entering time, and saving the cost.

The present application relates to a kind of conduit end connector, conduit device, connecting device and endoscope system, including conduit end connecting frame and first coupling unit;Conduit end connecting frame includes conduit end plate and conduit end support, conduit end support from conduit end plate towards the positive direction of first direction extends;First coupling unit includes conduit end thrust coupling part, conduit end tension coupling part and linear transmission mechanism relatively static in first direction;The input end of conduit end thrust coupling part extends conduit end plate, and is used to receive the action force of positive direction towards first direction and the action force of self-rotation in first direction, the output end of conduit end thrust coupling part is fixedly connected with the input end of linear transmission mechanism;Linear transmission mechanism is used to output linear reciprocating motion;The input end of conduit end tension coupling part extends conduit end plate, and is used to receive the action force of negative direction towards first direction.Conduit end connector can be used with handle end connector, realize the effect of accurate conduit and push-pull wire.

The invention provides a needling method of a plate-shaped preform, which comprises the following steps: sequentially laying carbon fiber cloth and a carbon fiber net tire on a plate-shaped foam cushion layer, fixing the laid carbon fiber cloth and carbon fiber net tire by using a hand-pricking plate, and performing pre-needling to obtain a first layer of a first unit; needling the first layer, and rotating the needle plate by a fixed angle in the positive direction during needling; the prefabricated body obtained after needling is completed is subjected to clockwise rotation by a fixed angle every time and then laid, the first step and the second step are repeated till 360-degree rotation laying needling is completed, and needling of a first unit is completed; and repeating the step 1 to the step 3, completing needling of the second unit and the third unit, taking the three units as a repeat, and continuously carrying out laying and needling until the plate-shaped prefabricated body is completed. By designing different needling angles and adjusting the needling depth of the prefabricated body, the needling needle can enter the same vertical needling depth, Z-direction needling fibers with different depths are formed, and diversity of the Z-direction structure in the prefabricated body is achieved.

Provided is an electronic component that ensures sufficient area as a notch area and improves design freedom. When a first magnetic body substrate (20) is viewed in a third positive direction, an outer edge of the first magnetic body substrate (20) includes a linear edge (S1). In addition, a notch (21A) is recessed inward from the edge (S1). When the first magnetic body substrate (20) is viewed in the third positive direction, a direction along the edge (S1) is taken as a first direction, and a direction perpendicular to the first direction is taken as a second direction. In this case, a maximum dimension of the notch (21A) in the first direction is different from a maximum dimension of the notch (21A) in the second direction.

The application discloses a kind of non-perfect information condition under ship basic structure shape three-dimensional modeling method, including obtaining the three-dimensional modeling main scale basic data of ship platform;Establish the three-dimensional modeling coordinate system of ship basic structure shape, with ship overhead satellite remote sensing image as reference, construct initial main deck boundary line and superstructure contour model, with the deflection angle adjustment correction of initial model, with the deflection angle of correction as the shooting visual angle of satellite remote sensing image, restore to construct the two-dimensional normal overhead view of main deck boundary line and superstructure contour;Construct the control point coordinate of main deck boundary line, superstructure contour in the positive direction of Z axis, as the contour control point height above waterline, restore to construct the two-dimensional normal side view of ship basic structure shape;According to ship multi-view photograph, ship basic structure three-dimensional fitting is carried out, and ship platform basic structure three-dimensional shape modeling is completed.The application can realize the three-dimensional modeling of ship geometric shape under non-perfect information condition.

The application relates to the technical field of image acquisition and processing, in particular to a skin fine texture acquisition method and system, wherein four light sources L1 to L4 are uniformly and sequentially arranged around the center line of a camera lens, each light source has at least three channels C1 to C3 and emits light rays to the same skin area to be acquired; a positive direction image and a negative direction image are acquired; images in the same coordinate axis direction are subjected to difference value operation to obtain gradient images in three directions; the gradient image gray values in the three directions are normalized to obtain normal line values in three channels; the normal line values in the three channels are converted to be respectively loaded into a normal line map three channel and output the normal line map; the positive direction image light source lighting mode comprises L1 and L2 lighting C1 and C2, the negative direction image light source lighting mode comprises L3 and L4 lighting C1 and C2, and C3 of the four light sources is all lighted in the positive direction image or the negative direction image, so that the image motion blur probability is reduced.

The present application relates to a kind of powder processing device and method for improving powder sphericity and surface finish, including processing cylinder and multiple rotating mechanism, lower rotating mechanism includes stirring blade, can be rotated in positive direction, upper rotating mechanism includes shaping blade, can be rotated in positive direction or reverse direction.The stirring blade of lower rotating mechanism is a certain obtuse angle with the direction of rotation, can better lift up powder, the shaping blade of upper rotating mechanism includes two inclined planes of positive and negative direction.The rotating direction of upper and lower rotating mechanism is opposite first, the inclined plane of shaping blade towards the direction of rotation is opposite with the direction of movement of the powder lifted up, angle is close to vertical, impact and break up agglomerated powder and satellite ball, then the rotating direction of upper and lower rotating mechanism is same, the inclined plane of shaping blade towards the direction of rotation is close to the direction of movement of the powder lifted up, mainly with friction effect, improve powder surface finish.The stirring blade of lower rotating mechanism makes the friction effect between powder particles in cylinder, can also quickly improve the surface finish of powder.

The utility model discloses mining slurry stirring equipment which comprises a mixing tank, a stirring device and a stirring device, wherein a mounting frame is connected to the lower part of the mixing tank; and the first mixing mechanism is connected to the interior of the mixing tank. A first driving motor drives a mixing frame on a first driving rod and a plurality of mixing rods to turn over materials in the forward direction, a second driving motor drives a first inclined material turning blade and a second inclined material turning blade on a second driving rod to turn over materials in the reverse direction, and due to the arrangement of a first mixing mechanism and a second mixing mechanism, the mixing directions are opposite; stirring is conducted from different angles and directions, the uniform mixing effect is improved, a third driving motor drives a plurality of smashing blades on a third driving rod to work, large or thick materials can be rapidly and effectively smashed, the situation that the materials form large blocks or agglomerates in the mixing process is avoided, the fluidity and the filling effect of slurry are improved, and the production efficiency is improved. Therefore, the overall efficiency and quality of slurry preparation are improved.

The application relates to the technical field of metamaterials, and proposes a metamaterial unit based on a fourteen-direction radiation symmetrical branch and an array structure of the metamaterial unit. The unit comprises a center node and fourteen branches extending outward from the center node; the fourteen branches are in a spatial full-symmetrical distribution, wherein six axial branches extend along the positive direction of an X-axis, the negative direction of the X-axis, the positive direction of a Y-axis, the negative direction of the Y-axis, the positive direction of a Z-axis and the negative direction of the Z-axis of a spatial rectangular coordinate system respectively, eight diagonal branches extend along directions which are equal acute angles with the X-axis, the Y-axis and the Z-axis and point to the body diagonal direction of eight spatial octants respectively, the lengths of all the branches extending outward from the center node are equal, and all the branches have the same cross-sectional size. A plurality of metamaterial units are arranged periodically in two dimensions or three dimensions to form a metamaterial array, which is used for constructing a lens, a focusing panel or a radome. The metamaterial unit has excellent wide-band stability and consistency in performance under any polarization direction.