215 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 invention discloses a design method of a monolithic polarization multiplexing dual-function super-structure lens device and the super-structure lens device, and belongs to the technical field of optical imaging. The designed device can respectively realize independent bright field and edge enhancement imaging functions according to the polarization state of incident light; the cross section of the nano unit forming the device is in an anisotropic C2 symmetrical shape, and the long axis and the short axis of the cross section are perpendicular to each other, so that linearly polarized light parallel to and perpendicular to the long axis in the polarization direction has independent phase delay after passing through the nano unit. A bright field and an edge enhancement imaging phase are respectively applied to a pair of orthogonal polarization states, so that the device can carry out bright field imaging in one polarization state and carry out edge enhancement imaging in the other polarization state, and the imaging efficiency can be improved under the conditions that other imaging devices are not needed and the resolution requirement is met. And dual-function imaging with relatively wide working bandwidth and relatively high imaging mode switching convenience is realized.

The invention provides an ICL postoperative arch height prediction and adjustment method and device, and the method comprises the steps: a data obtaining step: obtaining eye anatomical data of a patient, including the diameters of a short axis and a long axis of a ciliary sulcus; acquiring state data of the current implanted ICL, wherein the state data comprises a nominal size and a rotation angle in an eye; a geometric modeling and calculation step: establishing a two-dimensional geometric model of the ICL in the elliptical ciliary sulcus based on the nominal size of the ICL and the diameters of the long and short axes of the ciliary sulcus, calculating the diagonal length limited by four supporting leg points of the ICL on the model according to the rotation angle of the ICL in the eye, and further calculating the theoretical geometric arch height; and an adjustment scheme generation step: on the basis of the calculated theoretical geometric arch height, generating at least one secondary operation adjustment scheme for adjusting the actual postoperative arch height to be within a clinical ideal range, the adjustment scheme comprising rotating the current ICL to a new angle or replacing the current ICL with another ICL with a different size.

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.

A transmission line tower foundation height adjustment device relates to the technical field of electric power engineering, and comprises a connecting mechanism, an independent fine-tuning mechanism, and a unified height adjustment mechanism; the connecting mechanism comprises: a tower, a base, a connecting plate, a lifting plate, a buckle, a disc, a connecting rod I, a latch, a worm I, and a worm wheel; the base is fixedly welded to the lower end of the tower, the connecting plate is fastened to the base by bolts, the lower end of the connecting plate is clamped in a square groove of the lifting plate, a small groove is provided on the side of the connecting plate, a buckle is clamped in the groove, and the buckle is rotatably mounted on a shaft in a strip groove on the lifting plate; the shaft of the disc is rotatably mounted in a circular hole on the lifting plate, one end of the connecting rod I is rotatably mounted on a short shaft on the disc, and the other end of the connecting rod I is rotatably mounted on a short shaft on the latch; when the present invention is in use, the connecting plate on the base can be quickly connected to and detached from the lifting plate by the buckle, so that the installation of the tower is more convenient and quick.

The utility model discloses a sealing element and a connector. The sealing member includes: an elastic body formed with a through hole allowing a rectangular terminal with a cable to pass therethrough; and the inner sealing ribs are formed in the through holes and are used for being in interference fit with the cables so as to realize sealing between the inner sealing ribs and the cables. The inner contour line of the inner sealing rib is elliptical, and the long axis and the short axis of the elliptical inner contour line can respectively correspond to the long edge and the short edge of the rectangular cross section of the terminal so as to prevent the inner sealing rib from being damaged when the terminal passes through the through hole. According to the utility model, not only can the sealing element be prevented from being damaged when the terminal passes through the through hole of the sealing element, but also enough interference between the sealing element and the cable can be ensured, and the sealing performance and the sealing reliability of the sealing element are greatly improved.

The invention belongs to but not limited to the technical field of tunnel engineering, and particularly relates to a segment roundness measurement method and system based on a two-dimensional laser radar, and the method comprises the steps: S1, obtaining the point cloud data of a tunnel pipe wall under a polar coordinate system through the laser radar; s2, performing random noise filtering on the point cloud data and converting the point cloud data into a Cartesian coordinate system; s3, useless point cloud data generated by sundries such as pipelines and tracks on the pipe wall are filtered out; and S4, projecting the point cloud data to a two-dimensional plane, carrying out ellipse fitting on the filtered point cloud data to fit an ellipse contour of the section of the tunnel, and calculating a long axis and a short axis of the ellipse contour according to an ellipse curve equation so as to calculate the roundness of the tunnel. According to the invention, the laser radar is installed on the segment assembling machine for scanning, the installation of a redundant scanning device is avoided, the influence of a dust environment and sundries on scanning data is avoided to the greatest extent through the annular rotation of the segment assembling machine, and the operability and robustness of the scanning method are greatly improved.

The invention discloses a high-flow pressure and temperature measuring endoscope head end shell which is characterized in that an elliptical instrument channel mounting hole and a camera module mounting hole are formed in an end shell body, a snake bone mounting bracket is arranged at the near end of the end shell body, a sensor mounting hole is formed in the end shell body, and a sensor assembly is mounted in the sensor mounting hole; the radial sectional area of the instrument channel mounting hole is the same as that of the near end; compared with the prior art, large flow can be realized by arranging the instrument channel mounting hole for irrigation, and the pressure is more uniform; according to the size of the cross section of an instrument channel mounting hole, the long axis of the cross section is 1.8 mm, and the short axis of the cross section is 1.2 mm; compared with the prior art, the flow is larger, and the pressure is more uniform; the radial sectional area of the instrument channel mounting hole is the same as the radial sectional area of the near end; the fitting performance of the end shell body with the same radial sectional area of the far end and the near end of the instrument channel mounting hole is better.

This powder satisfies requirements 1 and 2. Requirement 1: |dA(T) / dT| satisfies 10 ppm / ° C. or more at at least one temperature T1 in a range of −200° C. to 1200° C. A is (a-axis (shorter axis) lattice constant) of a crystal in the powder) / (c-axis (longer axis) lattice constant of the crystal in the powder), and each of the lattice constants is obtained by X-ray diffractometry of the powder. Requirement 2: a particle diameter D50 at a cumulative frequency of 50%, a particle diameter D10 at a cumulative frequency of 10%, and a particle diameter D90 at a cumulative frequency of 90% in a volume-based cumulative particle diameter distribution curve obtained by a laser diffraction scattering method satisfy conditions (I) and (II): (I) D10 / D50 is 0.05 or more and 0.45 or less; and (II) D90 is 0.5 μm or more and 70 μm or less.

The invention discloses a rock fracture closing simulation method, system and equipment and a storage medium, firstly, a two-dimensional equivalent model is established based on a fracture sample, a fracture in the two-dimensional equivalent model is equivalent to an ellipse-like section, then a plurality of sampling points are arranged on the upper boundary and the lower boundary of the fracture, a load is loaded, and then the fracture closing simulation model is established based on the displacement of the sampling points on the upper boundary and the lower boundary of the fracture before and after the load is loaded. The length change of the fracture under each load step length is calculated, the fracture area is calculated, finally, the average opening degree of short axes of all the fractures is calculated, and whether all the fractures are completely closed or not is judged; if not, crack equivalent parameters are calculated and updated, and the steps are repeatedly executed after loads are increased; on the basis of a numerical simulation method, the distribution and stress deformation conditions of the fracture in the rock are simulated, the length changes of the long axis and the short axis of the fracture are fully considered, the fracture region area is combined, the stress-strain process of the fracture is more accurately simulated, the fracture closing state is effectively evaluated, and the accuracy of a simulation result is improved.

The utility model relates to a splicing type pneumatic conveying pipeline elbow which comprises an inlet flange, an inlet straight pipe, an inlet transition pipe, an impact elbow, a wear-resisting elbow, an outlet transition pipe, an outlet straight pipe and an outlet flange which are sequentially connected, and a fastening hoop assembly is arranged outside a connecting port of the impact elbow and the wear-resisting elbow. The section of each of the impact elbow and the wear-resistant elbow is a special-shaped surface consisting of a semicircular structure at the upper half part and a semi-elliptical structure at the lower half part, the radius of the semicircular structure is equal to half of the length of the short axis of the semi-elliptical structure, and the ratio of the length of the long axis of the semi-elliptical structure to the radius of the semicircular structure is greater than 1.6. By arranging the special-shaped section form of the elbow, a vortex is formed when gas flows through the inlet transition pipe, and the vortex can collide with incoming flow, so that the speed of fluid is reduced, the impact force of materials on the turning part of the elbow is relieved, and the abrasion degree of the inner wall of the elbow is reduced; and the pipe section can be partially replaced when being partially damaged, so that the comprehensive service life of the elbow pipe is prolonged.

The invention discloses a deck reinforcing structure for reducing stress concentration of a deck orifice and a design method of the deck reinforcing structure. The deck reinforcing structure comprises a deck plate, longitudinal ribs, kidney-shaped circular holes formed in the deck plate, reinforcing short ribs and surrounding edge flat steel welded to the edges of the kidney-shaped circular holes, the distance between every two adjacent longitudinal ribs on the deck plate is s, when the long axes of the kidney-shaped circular holes are parallel to the longitudinal ribs, the length n of the short axes of the kidney-shaped circular holes is smaller than the distance s of the longitudinal ribs, and the reinforcing short ribs are welded to the edges of the kidney-shaped circular holes. When the kidney-shaped holes are located between the two adjacent longitudinal ribs, the kidney-shaped holes are first kidney-shaped holes, the length n of the short axis of each first kidney-shaped hole is equal to s-2a, and a ranges from 20 mm to 30 mm. According to the deck reinforcing structure, materials are saved to the most extent, and meanwhile stress concentration of the orifices can be effectively reduced.

The invention relates to the technical field of harmonic reducer wave generators, and discloses a harmonic reducer wave generator capable of bearing axial load, which comprises a rigid gear, a flexible gear and a wave generator, the wave generator is arranged in the flexible gear, the flexible gear is arranged in the rigid gear, the inner ring of the rigid gear is meshed with the outer ring of the flexible gear through teeth, and the inner ring of the rigid gear is meshed with the outer ring of the flexible gear. The long shaft part of the flexible gear is in contact with the rigid gear, the short shaft part of the flexible gear does not participate in action, the wave generator comprises an oval cam and a flexible bearing, and the oval cam is arranged in the flexible bearing; the flexible bearing comprises a bearing inner ring, a bearing outer ring and balls, the bearing inner ring and the bearing outer ring are each provided with two channels, the distance between the two channels of the inner ring is smaller than that between the two channels of the outer ring, and when the multiple balls are arranged in the corresponding channels in the bearing inner ring and the bearing outer ring, the contact points of the balls and the outer ring and the contact points of the balls and the inner ring are connected through the connecting line of the centers of the balls. And a certain included angle is formed between the bearing and the radial direction of the bearing and is generally about 15 degrees. The flexible bearing can bear a certain axial load, the bearing capacity of the speed reducer can be greatly improved, the precision service life of the speed reducer can be greatly prolonged, the application field and range of the speed reducer are expanded, and the flexible bearing is simple in structure and convenient to install.

The utility model belongs to the technical field of load detection, and discloses a static load loading device of a crane, which is characterized in that a through hole is arranged in a load block along the short axis direction, a pin shaft penetrates through the load block and is inserted with the load block, and limiting pieces are arranged at two ends of the pin shaft; the load blocks in the horizontal direction are prevented from displacing due to vibration or unstable factors in the hoisting process of the crane, meanwhile, the limiting grooves with the same width as the load blocks are formed in the front faces of the load blocks in the short axis direction of the load blocks, the load blocks stacked up and down can be effectively limited, and the load blocks are prevented from being damaged. The safety of a working scene and the reliability of lifting operation are improved, in addition, the space of a carrier is fully utilized, and more load blocks can be contained; and the limiting piece is arranged on the lifting rod, so that the movement of the lifting rope can be effectively limited, and the stability in the lifting process is further improved.

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.

The present invention proposes a probe positioning method and device for a residual stress measuring instrument using an X-ray diffraction method. The positioning device includes a first laser source with a wavelength of λ1, a second laser source with a wavelength of λ2, and a third laser source with a wavelength of λ3. The diffraction spots of the second laser source and the third laser source are elliptical, and λ1≠λ2≠λ3. The short axis and long axis of the diffraction spot of the third laser source are equal to the short axis and long axis of the diffraction spot of the second laser source. The second laser source and the third laser source are respectively movably arranged on both sides of the first laser source, and the distance and angle between the second laser source, the third laser source and the first laser source are variable. During positioning, the positional relationship of the first laser source, the second laser source, and the third laser source of the probe is adjusted to meet specific conditions, and then the distance and normal parallel positioning are performed by observing whether the spots of the three laser sources on the surface of the sample to be measured overlap. There is no contact with the detection point throughout the whole process, which can effectively eliminate the error caused by contact.

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.

To provide a low-invasive catheter which is capable of confirming a state of a part having an X-ray impermeable marker arranged therein under fluoroscopy.SOLUTION: A catheter 1 includes: an outer side resin tube 11 having a long direction x1; an inner side resin tube 12 arranged in a lumen of the outer side resin tube 11; and a first marker 41, a second marker 42, and a third marker 43, being X-ray impermeable. The first marker 41, the second marker 42, and the third marker 43 have an outer shape in a cross section vertical to the long direction x1 having a long axis and a short axis. In the first marker 41, the second marker 42, and the third marker 43, orientation of the long axis of each outer shape in the cross section vertical to the long direction x1 is aligned.SELECTED DRAWING: Figure 2

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 utility model discloses a rockfall protection shed frame which comprises an oval skirt edge beam, a vertebra beam is arranged in the long axis direction of a top cover, the middle of the vertebra beam protrudes upwards, and the two ends of the vertebra beam are fixedly connected with the skirt edge beam. A plurality of rib beams are arranged in the short axis direction of the top cover, the middle of each rib beam is fixedly connected with the vertebra beam, and the two ends of each rib beam are fixedly connected with the skirt beams; the skirt edge beams, the vertebra beams and the multiple sets of rib beams form a plurality of arc-shaped installation faces, and each arc-shaped installation face is fixedly provided with a shield plate. A plurality of stand columns are fixed to the bottoms of the skirt beams. First force unloading is achieved through the shield plate, second force unloading is achieved through deformation of the reinforcing mesh and the bubble concrete layer of the shield plate, third force unloading is achieved through cooperation of the rib beams and the insertion bolts, fourth force unloading is achieved through cooperation of the rib beams, the vertebra beams and the skirt edges, and fifth force unloading is achieved through the stand columns. The utility model has the advantages of better structural strength, capability of realizing multi-time grading unloading and stronger impact resistance.

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 utility model provides an MEMS (Micro Electro Mechanical System) micromirror structure and an MEMS micromirror integrated product. The MEMS micromirror structure comprises a reflecting mirror; the frame is used for bearing the reflecting mirror and comprises a fixed structure and a movable frame; the first rotating shaft structure is used for connecting the reflecting mirror and the movable frame and supporting the reflecting mirror to perform torsional motion by taking the first rotating shaft structure as an axis; the second rotating shaft structure is used for connecting the movable frame and the fixed structure and supporting the movable frame to drive the reflecting mirror to perform twisting motion by taking the second rotating shaft structure as an axis; wherein the first rotating shaft structure comprises a beam part main body and a transition connecting end connected between the beam part main body and the reflecting mirror, the width of the transition connecting end is not smaller than one half of the short axis length of the reflecting mirror, and the width of the beam part main body is not smaller than the width of the transition connecting end; and the reinforcing structure is positioned on the back surfaces of the reflecting mirror and the transition structure and is a closed structure formed by connecting a straight-line section and a curved-line section end to end.

The invention relates to an industrial CT scanning geometric structure detection result evaluation and process parameter setting method. The detection result evaluation method comprises the steps that a uniform blank is adopted to manufacture a test block with the diameter being D; the test block and the detected sample are both placed on a rotary table, the test block is located on the extension of the long edge of the scanning section face of the detected sample, an X-ray machine is started to conduct CT scanning on the detected sample and the test block, and a CT image is obtained; in a CT image, an image of an area where a test block is located is intercepted, a gray threshold is set, threshold segmentation processing is carried out on the intercepted image, edge contour lines of the threshold segmentation image of the test block are extracted, ellipse fitting is carried out on position information of all the contour lines, an optimal fitting result is calculated, and the lengths of a long axis and a short axis of an ellipse are obtained. Dividing the length of the long axis of the ellipse by the length of the short axis to obtain the shape degree value of the ellipse; if the shape degree value of the ellipse is smaller than a set shape degree threshold value, it is judged that the geometric structure precision of the current CT detection result meets the requirement.

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.

To provide a toothbrush capable of cleaning both a tooth surface and a space (dental neck, interdental part) by being bent in both directions of a long axis direction and a short axis direction of a head part.SOLUTION: A head part 10 of a toothbrush 100 includes: a first region R1 disposed with a plurality of first bristle bundles 13A comprising first bristles whose tips have a first tip diameter; and a second region R2 disposed with a plurality of second bristle bundles 13B comprising second bristles whose tips have a second tip diameter. The first region has a cross shape extending along both directions of a long axis direction and a short axis direction of the head part, and the second region is divided into four or more regions by the cross-shaped first region.SELECTED DRAWING: Figure 9

The invention discloses a poultry egg shape measuring device, which relates to the field of size measurement, does not need power supply, is simple in structure, can adapt to different use environments, and is lower in manufacturing cost. The invention further provides a using method of the device, the method comprises the steps that the long-axis detection device is driven by the gravity of the egg body to change the position in the horizontal direction, the change amount of the position in the horizontal direction serves as the long-axis size of the egg body, and the change amount of the position of the short-axis detection device in the vertical direction serves as the short-axis size of the egg body; the measurement of the egg body size is realized, the measurement process is simplified, and the size measurement precision is improved.

The utility model discloses a loudspeaker digital beam array module, and belongs to the technical field of loudspeakers. The loudspeaker comprises a plurality of loudspeaker digital wave beam dot matrix modules which are arranged in an array along the long axis and the short axis of the loudspeaker digital wave beam dot matrix modules; each loudspeaker digital beam dot matrix module at least comprises a sound post; the top and the bottom of the sound post are respectively provided with at least three grooves, and the side wall of the sound post is provided with hole sites matched with the grooves; the plug-in assembly is arranged in the groove, and the connecting assembly is connected with the loudspeaker digital beam dot matrix modules which are arranged in an array mode. The loudspeaker digital beam dot matrix modules are arranged in the long axis direction and the short axis direction in an array mode, and therefore multi-dimensional sound coverage and directivity control can be achieved. And the plug-in component and the connecting component improve the flexibility and expandability of the device. The connecting strips are arranged in an array mode in the short-axis direction, and stability and firmness in the short-axis direction are guaranteed.