85 results about "Short axis" patented technology

The invention belongs to the field of cable eccentricity detection, and particularly relates to a cable eccentricity detection method and system based on X rays. The method comprises the following steps: calculating a gradient magnitude diagram and a gradient direction diagram through an X-ray image of a cable, screening a point with the local maximum gradient magnitude and low neighborhood divergence as a contour starting point, performing contour tracking to generate a contour point set, and selecting a next contour point based on a tangential prediction direction; performing ellipse fitting on the contour point set to obtain a geometric center, long and short axis parameters and a root-mean-square error of a fitting ellipse, dividing the fitting ellipse into an inner candidate ellipse and an outer candidate ellipse according to a long axis, and matching the inner candidate ellipse meeting the condition for each outer candidate ellipse; and screening out an outer candidate ellipse and an inner candidate ellipse which meet conditions from the candidate pairs, and calculating the eccentricity of the cable to be measured based on geometric center coordinates of the outer candidate ellipse and the inner candidate ellipse. According to the invention, the accuracy and reliability of cable eccentricity measurement results can be improved.

The utility model relates to the field of medical instruments, in particular to a jaw cyst windowing and pressure reducing device. The device comprises a guide part, a connecting part and a base which are sequentially arranged from top to bottom. And the small-diameter section of the guide part is positioned at the upper part. The connecting part is a cylinder, and the diameter of the connecting part is smaller than that of the bottom of the guide part. The short axis size of the base is larger than the diameter size of the bottom of the guide part. The bottom of the base is provided with a through hole penetrating to the position above the guide part, and a drainage channel is formed. The springback characteristic of soft tissue in the bag cavity is utilized, so that the guide part and the connecting part can be fixed in the bag cavity and cannot fall off; meanwhile, through the elliptic cylindrical base, the base is effectively prevented from entering the bag cavity, the shape of the vestibular groove is met, and the wearing is free of foreign body sensation and more comfortable.

The utility model discloses an ultra-short-axis composite bow which comprises a bow body, a bow piece, a tension adjusting assembly, a pulley block and a bow pushing indicating structure, and aims to solve the problem that in the prior art, a common shooting composite bow is difficult to carry on an original field competition field to be frequently transferred due to the fact that the size is large and the weight is heavy when the common shooting composite bow is used for an original field competition. Compared with a common composite bow with double-side bow pieces, the composite bow with the ultra-short shaft is designed, the design of the single-side bow pieces is adopted, the size of the whole bow is greatly reduced, the weight of the whole bow is reduced, the composite bow is particularly suitable for being carried and moved on an original field competition field, physical output is greatly reduced, and furthermore, by means of a pushing indication structure, the bow can be pushed conveniently and rapidly when pushed. When the pressures on the two sides of the bow handle are the same, corresponding indication is given, so that a green hand can be trained in the early stage conveniently, and the problem that bow pushing is not correct due to the fact that the pressures on the two sides are not uniform during bow pushing is solved.

An inkjet printer is described. The inkjet printer has a substrate holder assembly that includes a base member having a long axis in a first direction and a short axis in a second direction perpendicular to the first direction; a contact member coupled to the base member, the contact member having a long axis in the first direction and a short axis in the second direction; a holder carriage coupled to the base member; a linear extender coupled between the base member and the contact member and extending in a third direction intersecting with the first direction and the second direction from the base member toward the contact member; and a flex member coupled to the base member, extending in the second direction between the linear extender and the contact member, and having a flex direction in a direction perpendicular to the first direction and the second direction.

An illumination optical system is configured to convert an intensity distribution of incident light in a long axis direction from a Gaussian distribution, to thereby bring an intensity distribution of a shaped beam on a modulation surface of an optical modulator in the long axis direction into a top hat distribution, and to guide the incident light to the optical modulator as parallel light in the long axis direction and as convergent light in the short axis direction. A short axis side light shielding part is disposed at a condensing position on a short axis side of a modulated beam which is emitted from the optical modulator and is convergent light on a short axis side and blocks a non-zero-order diffracted beam on the short axis side of the modulated beam.

The invention relates to the field of mechanical connecting pieces, and discloses a self-locking screw capable of quantifying pre-tightening force and a using method thereof.The self-locking screw capable of quantifying the pre-tightening force comprises a mounting base, strip-shaped holes are symmetrically formed in one side of the mounting base, a screw body is in threaded connection with the interior of the mounting base, a mounting hole is formed in one side of the screw body, and the mounting hole is in threaded connection with the mounting base. A mounting hole is formed in one side of the screw body, a through hole is formed in the other side of the screw body, a spring pin is mounted in the mounting hole of the screw body, a chamfer is arranged at the end of the spring pin, and the through hole is in an oval shape when the screw body is not locked. When the screw body is screwed into the mounting seat and a certain pre-tightening force is achieved, the original oval through hole is changed into a round through hole, the end of the spring pin can penetrate through the round through hole under the action of elastic potential energy of the spring pin, the screw body is prevented from loosening, and therefore the screw body can be screwed into the mounting seat by adjusting the sizes of long and short axes of the spring pin and the through hole. Therefore, the device can adapt to application occasions with different pre-tightening forces.

The invention relates to the technical field of tapping equipment, and particularly discloses tapping equipment for a blast furnace coal gun external thread connecting piece, which comprises a rack, a processing bin is fixedly connected to the left side of the top of the rack, a tapping threading die is mounted on the side surface of the processing bin, a workpiece frame is arranged on the right side of the top of the rack, and a blanking frame is inserted into the top of the workpiece frame; the tapping equipment for the external thread connecting piece further comprises a clamping assembly arranged on the inner side of the workpiece frame, the clamping assembly comprises a mounting frame fixedly connected to the inner side of the workpiece frame, a clamping part is arranged on the left side of the mounting frame, and the supporting assembly is arranged on the inner side of the workpiece frame. And the deformation of the round pipe part with a thin pipe wall is prevented, so that the out-of-round of the pipe caused by overlarge radial force during clamping, tooth missing of a sleeved thread in the long axis direction of an ellipse and over-shallow in the short axis direction are avoided, and the machining quality of the round pipe part is improved.

The purpose of the present invention is to provide a composite film having a high coverage of a nanocrystalline plate and a high amount of light absorption per unit thickness. A composite film (10) including a nanocrystalline plate (11) having a composite layer structure in which a first layer containing a cation A to which ligands coordinate and a second layer containing a cation B and an anion X are alternately stacked, wherein the aspect ratio (L / S or S / L) that is a rectangular shape feature amount in a direction intersecting the stacking direction of the composite layer structure is 0.2-5, when the thickness of the nanocrystalline plate is denoted by t and the length of the short axis intersecting the stacking direction of the nanocrystalline plate is denoted by S, t and S satisfies S / t ≥ 3, and a variance σn of the number of stacked layers in the nanocrystalline plate is 0.7 or less.

The invention discloses a clamp head mechanism and a bipolar electric treatment device. The bipolar electric treatment device comprises the clamp head mechanism (10), a conductive traction part (30), an electric connection part and an operation part, the clamp head mechanism (10) comprises a clamp cup assembly (1) and a clamp head assembly (2), wherein the clamp cup assembly (1) comprises a first clamp cup (11) and a second clamp cup (12) which are oppositely arranged; the clamp cup seat (2) is configured to support the clamp cup assembly (1); the insulation supporting piece (3) is arranged between the first clamp cup (11) and the second clamp cup (12), and when the first clamp cup (11) and the second clamp cup (12) execute closing operation, the insulation supporting piece (3) separates the first clamp cup (11) from the second clamp cup (12). Wherein, on the same projection plane, the projection part of the insulating support member (3) along the first direction covers the projection of the first clamp cup (11) and / or the second clamp cup (12) along the first direction, and the first direction is perpendicular to the short axis direction and the long axis direction of the first clamp cup (11) and / or the second clamp cup (12).

The present application belongs to the field of cable eccentricity detection, and particularly relates to a cable eccentricity detection method and system based on X-ray. The method calculates gradient amplitude graph and gradient direction graph through X-ray image of the cable, screens points with local maximum gradient amplitude and low neighborhood divergence as contour starting points, generates contour point set through contour tracking, and selects next contour point based on tangent prediction direction. Then, the contour point set is subjected to ellipse fitting, the geometric center, long and short axis parameters and root mean square error of the fitted ellipse are obtained, the fitted ellipse is divided into inner and outer candidate ellipses according to the long axis, and each outer candidate ellipse is paired with the inner candidate ellipse meeting the condition. The outer candidate ellipse and the inner candidate ellipse meeting the condition are screened from the candidate pair, and the eccentricity of the cable to be measured is calculated based on the geometric center coordinates of the two. The present application can improve the accuracy and reliability of the cable eccentricity measurement result.

Embodiments of the present application disclose an ultrasonic transducing assembly and an ultrasonic transducing array, which can improve the working bandwidth of the ultrasonic transducing assembly. The ultrasonic transducing assembly comprises a substrate, at least one first PMUT unit and at least one second PMUT unit, and the first PMUT unit and the second PMUT unit are located on the substrate. The cross-sectional shape of the first PMUT unit has a long axis and a short axis, and the cross-sectional shape of the second PMUT unit has a long axis and a short axis, and the cross sections are parallel to the substrate. The size of the first PMUT unit is different from the size of the second PMUT unit. The difference between the frequency corresponding to the wave peak position on the sensitivity curve of the first PMUT unit and the frequency corresponding to the wave trough position on the sensitivity curve of the second PMUT unit is less than a preset value, and / or the difference between the frequency corresponding to the wave trough position on the sensitivity curve of the first PMUT unit and the frequency corresponding to the wave peak position on the sensitivity curve of the second PMUT unit is less than a preset value.

The invention discloses a receiving system, a laser radar, a detection device and a vehicle. The system comprises a lens group; the optical filter is positioned on the image side of the lens group; the detector is located on the image side of the optical filter, and the detector is provided with a long axis and a short axis; wherein the focal length of the receiving system in the first direction is different from the focal length of the receiving system in the second direction, the first direction and the second direction are perpendicular to each other in a plane perpendicular to the optical axis, the first direction penetrates through the optical axis, the first direction is parallel to the long axis, and the second direction is parallel to the short axis. Therefore, by arranging the receiving system, a high-harness and high-resolution detection effect can be realized in the first direction, and light in a larger range can be received in the second direction, so that signal crosstalk of the receiving system in a receiving process is reduced, and the signal-to-noise ratio and the dynamic range of a received signal are further improved. And the receiving system is short in length, small in occupied space and low in cost.

The application discloses a method and device for determining static friction of a surface bubble of a femtosecond laser modified sample and a storage medium. The method comprises the following steps: placing the femtosecond laser modified sample as a heating surface in a test channel arranged vertically to the ground, and controlling a working medium in the test channel to flow in a direction upwardly perpendicular to the ground; applying a heating power to the femtosecond laser modified sample to generate a bubble on a heating surface of the femtosecond laser modified sample; determining a long axis length and a short axis length of the bubble in a preset state, and a bubble movement speed of the bubble; the preset state represents a shape and a movement state of the bubble when the bubble is close to separating from the heating surface; and determining the static friction of the bubble in the preset state according to the long axis length, the short axis length and the bubble movement speed.

The reduction forceps for treating the rotational dislocation type tibial plateau fracture comprise a first forceps leg and a second forceps leg which are oppositely arranged, finger rings are integrated at the near ends of the first forceps leg and the second forceps leg, and a first forceps shoulder and a second forceps shoulder are integrated at the far ends of the first forceps leg and the second forceps leg respectively. A movable hole for the first forceps shoulder to rotate penetrates through the second forceps shoulder, the first forceps shoulder penetrates through the second forceps shoulder through the movable hole, a short shaft is fixed to the first forceps shoulder, and the second forceps shoulder rotates around the short shaft. When one clamp arm rotates to contact with the rotary dislocation tibial plateau, the other clamp arm rotates to contact with the rotary dislocation tibial plateau, at the moment, the heights of the ends of the two clamp arms are inconsistent, but when the two clamp arms are close to each other for resetting, the pressure direction of the ends of the two clamp arms is perpendicular to the resetting direction of the rotary dislocation tibial plateau, and the resetting stability is improved.

The invention discloses a two-dimensional scanning micromirror with high reliability and high stability, which is characterized in that a second driving unit is arranged at the center position in a frame, and driving beams on the left side and the right side of the second driving unit are rotatably connected with the frame through two slow shafts; the first driving unit is arranged at the center position in the second driving unit in the ring inner circumference direction of the second driving unit, and the upper side and the lower side of the first driving unit are rotationally connected with a driving beam of the second driving unit through two short shafts. The rotating mirror is arranged in the center of the first driving unit, and the upper side and the lower side of the rotating mirror are rotationally connected with a driving beam of the first driving unit through two long shafts. On the premise of ensuring the reliability of the slow axis, the y-direction scanning FOV can be improved, the stress of a high-stress alternating region is reduced by optimizing the distribution of the reinforcing ribs, the reliability of an electrical circuit is improved, the overall fatigue life of the micro-mirror is prolonged, the vibration crosstalk of the fast and slow axes is reduced through the short-axis design and the layout of the reinforcing ribs, and the working stability is improved.

An artificial hip joint prosthesis and a method for mounting the same are provided. The artificial hip joint prosthesis includes a spherical chamber and a ball head. An outer spherical surface of the ball head fits with an inner spherical surface of the spherical chamber to form a spherical hinge. An inner spherical surface of the spherical chamber has an opening in an elliptical shape or a similar shape with a long axis and a short axis, to allow insertion of the ball head. The long axis of the opening in the elliptical shape or the similar shape has a length A, and the short axis of the opening has a length B. The ball head is mounted inside the spherical chamber and has a diameter C, in which B<A≤C.

A sliding component includes a pair of sliding members being slidable relative to each other on sliding surfaces of the sliding members. In the sliding component, one of the sliding surfaces includes a dimple group in which a plurality of dimples is arranged. Each of the dimple has an opening portion whose shape has a long axis and a short axis orthogonal to the long axis. In the dimple group, the dimples are arranged along a curve having a curvature different from a curvature of a circumference of the one of the sliding surfaces.

An ultrasonic transducer is provided, which includes a first transducer and a second transducer. The first transducer includes several first array units arranged along a first direction to form a first array. The first direction is a direction of a long axis of the ultrasonic transducer. The second transducer includes several second array units arranged along the first direction to form a second array. The second array and the first array are interleaved and separated from each other. One of the second array units is sandwiched between adjacent two of the first array units. The first transducer and the second transducer have a common reference coordinate and have a function of a multi-focus lenses along the second direction. The second direction is a direction of a short axis of the ultrasonic transducer, which is substantially perpendicular to the first direction.

A metal mask in which shadow is less likely to occur while the strength is kept, and a method for manufacturing the metal mask are provided. The metal mask includes a first surface, and a second surface positioned opposite to the first surface. The first surface has through-holes, a first top part, and a second top part. The through-holes have a first through-hole, a second through-hole, a third through-hole, a fourth through-hole, a fifth through-hole, and a sixth through-hole. The first through-hole has a first short axis and a first long axis. The second through-hole has a second short axis and a second long axis. The third through-hole has a third short axis and a third long axis. The fourth through-hole has a fourth short axis and a fourth long axis. The fifth through-hole has a fifth short axis and a fifth long axis.

Provided are a calibration device and a calibration system. The calibration device comprises: a lower column; an upper column formed on one surface of the lower column, the surface being parallel to the short axis of the lower column; and a head comprising markers on surfaces thereof, having a first groove in one of the surfaces, and being coupled to the upper column via the first groove.

A free space metasurface near-far field decoupling display method based on lattice displacement belongs to the technical field of micro-nano optics, and comprises the following steps: step 1, constructing a multi-nanostructure metasurface unit model: constructing a metasurface basic unit comprising a plurality of nanostructures, the metasurface basic unit comprising a substrate and nano bricks, different transmittances and phase regulation and control thereof are obtained by changing the long axis and the short axis of the nano-rotation; step 2, optimizing the structural parameters of the nanostructure unit according to the wavelength lambda of incident light; step 3, independently regulating and controlling the amplitude and the phase by using a Jones matrix; 4, target light field coding and reverse optimization solution of parameters are carried out; and step 5, optimizing the metasurface: mapping the structure parameter of each pixel point optimized in the step 4 back to the overall array of the metasurface according to the mapping of the size, the phase and the transmittance of the nano brick obtained in the step 1. According to the invention, more efficient and diversified optical information display is realized, the design is flexible, the function integration level is high, and the application range is wide.

The application belongs to the technical field of water turbine processing, and particularly relates to a positioning method of a robot shovel-grinding water turbine movable guide vane tooling. The positioning method comprises the following steps: installing a short shaft end positioning mechanism; installing a long shaft end positioning mechanism to position the Y-axis direction of a guide vane coordinate axis; hoisting the guide vane to make the short shaft end face of the guide vane adhere to the positioning end face of the short shaft end positioning mechanism tooling, and first perform axial coarse adjustment, then perform axial fine adjustment after the axial coarse adjustment is completed, and position the X-axis direction of the guide vane coordinate axis; position the Z-axis direction of the guide vane coordinate axis; install two jacks to support the left and right ends of a guide vane blade body profile, and adjust the guide vane to limit the rotation of the X-axis of the guide vane coordinate axis. The method can reduce the adhesion degree of the guide vane and the tooling from the level of 1mm-10mm to 0.1mm-1mm, and effectively reduces the number of manual teaching of the robot cutter track through the limiting of the tooling, and improves the working efficiency of the automatic shovel-grinding of the guide vane.

The application discloses a pure metal anisotropic holographic impedance metasurface antenna and a design method. Since the pure metal structure and the patch structure with a dielectric substrate have complementary characteristics in structure, according to the Babinet principle, only the angle corresponding to the long axis is increased by 90 degrees to the angle corresponding to the short axis as a rotation angle, and the pure metal structure unit can be used for design. Combined with the holographic principle, the leaky wave theory and the Babinet principle, the mapping relationship between the tensor impedance of the pure metal structure unit and the geometric parameters of the unit is directly calculated, and a pure metal anisotropic impedance holographic metasurface model is established. Compared with the non-flat pure metal modulation tensor impedance metasurface realized by the additive manufacturing process and the pure metal space wave modulation transmitting array and reflecting array, the pure metal anisotropic impedance holographic metasurface has unique advantages of simple manufacturing, super-small appearance and easy integration.

A permanent magnet contains a rare earth element R, a transition metal element T, and B, contains Nd as R, contains Fe as T, and contains a plurality of main phase grains and a plurality of R-rich phases. The plurality of main phase grains contain R, T, and B, and the plurality of R-rich phases contain R. The plurality of main phase grains observed in a cross section of the permanent magnet are flat, and the cross section is substantially parallel to the direction of an easy magnetization axis of the permanent magnet. The plurality of R-rich phases are each located between the plurality of main phase grains and are substantially perpendicular to the direction of the easy magnetization axis. An average of intervals of the plurality of R-rich phases in a direction substantially perpendicular to the direction of the easy magnetization axis is 30 μm or more and 1000 μm or less. An average of lengths of short axes of the plurality of main phase grains observed in the cross section is 20 nm or more and 200 nm or less.

The application provides a design method and use method of a pedicle screw guide plate, and belongs to the field of medical instruments, and comprises the following steps: extracting the cross-sectional profile of a target vertebra based on image scanning to obtain the long-axis vertex position and end-axis vertex position of the target vertebra; establishing a two-dimensional coordinate system through the long axis and the short axis of the target vertebra, fitting a standard ellipse equation according to the long-axis vertex and the short-axis vertex of the target vertebra; designing a guide plate base according to the bone surface between the two focal points of the standard ellipse equation; and performing parameterized modeling on the guide hole at the focal point position to obtain a guide plate; the guide hole is used for mounting a pedicle screw, and the technical scheme of the application realizes a significant breakthrough in terms of surgical precision, safety, efficiency, cost control and the like through accurate positioning and personalized guide plate design by mathematical modeling.

The application belongs to the technical field of antennas and relates to a circularly polarized reflecting unit and a beam reconfigurable reflecting antenna. The circularly polarized reflecting unit comprises a patch layer, a dielectric layer and a ground layer. The patch layer comprises a first patch and four second patches. The first patch is in a square structure. The second patch is in an elliptical structure, the long axis of which is collinear with one symmetric axis of the square structure, and the short axis is parallel to the corresponding side of the square structure. One side of the elliptical structure is tangent to the square structure, and the other side of the elliptical structure has a cutting groove, the straight side of which is parallel to the adjacent side of the square structure. The four second patches form a "cross" structure. Each side of the first patch is connected to the corresponding second patch through a diode. At the same time, the working states of the two diodes opposite to each other are the same, and the working states of the two diodes adjacent to each other are opposite, so as to realize circularly polarized reflection. The application can realize circularly polarized reflection.

A kind of rock fracture closure simulation method, system, equipment and storage medium, first, based on the fracture sample establishes two-dimensional equivalent model, and the fracture in it is equivalent to oval section, then set several sampling points on the upper and lower boundaries of fracture, and load, then based on the displacement of sampling point on the upper and lower boundaries of fracture before and after loading, the length change of each load step under fracture is calculated, and the fracture area is calculated, finally, the average opening of all short axes of fracture is calculated, and whether all fractures are completely closed is judged;If not, the fracture equivalent parameters are calculated to update, and the above steps are repeated after loading;The method based on numerical simulation, simulate the distribution and stress deformation of fracture in rock, and fully consider the length change of long axis and short axis of fracture, combined with fracture area, more accurately simulate the stress-strain process of fracture, effectively evaluate the fracture closure state, improve the accuracy of simulation result.

The CT scanning system current modulation method, device and equipment provided by the embodiment of the invention comprises the following steps: according to scanning data, determining a long axis and a short axis of a cross section of a scanning die body at different scanning positions and an average equivalent diameter of the scanning die body; according to the long axis and the short axis of the cross section of the scanning die body at different scanning positions and the average equivalent diameter and the initial modulation coefficient of the scanning die body, determining a first exposure current of the bulb tube at different scanning angles at the same scanning positions; according to the incidence relation between the scanning angle and the scanning time and the first exposure current, determining a second exposure current of the bulb tube at different scanning time at each same scanning position; according to the second exposure current, determining the current change rate of the bulb tube at each same scanning position at different scanning time; and adjusting the initial modulation coefficient of the first exposure current at each scanning position according to the relationship between the current change rate of the bulb tube at each same scanning position at different scanning time and the preset dose change rate of the bulb tube.

The present application relates to the technical field of workpiece roundness detection, and provides a heat treatment shaft workpiece roundness detection device and detection method, which comprises a base; an end clamping device comprises a first clamping piece rotatably arranged on the base and a second clamping piece movably arranged on the base, the second clamping piece can move along the axial direction of the shaft workpiece to clamp the shaft workpiece together with the first clamping piece, and the first clamping piece is used to drive the shaft workpiece to rotate; an upper probe is floatingly arranged on the top of the base and is used to floatingly contact the circumferential wall of the shaft workpiece to measure the short diameter point of the shaft workpiece; an upper pressing piece can be lowered to press above the short diameter point of the shaft workpiece to limit the upward movement of the shaft workpiece; a lower probe is floatingly arranged on the base and is used to floatingly contact the circumferential wall of the shaft workpiece to detect the long diameter point of the shaft workpiece when the shaft workpiece rotates and obtain the difference between the long axis length and the short axis length of the shaft workpiece, so that the detection error is effectively reduced, the separation interference term is reduced, the calculation path is simplified, and the intuitiveness and reliability of the detection result are improved.