42results about How to "High deformation accuracy" patented technology

The invention discloses a lithography layout, comprising an exposure unit, wherein four edges of the exposure unit are provided with a cutting street respectively; each cutting street is arranged in windmill shape; and the tail end of each cutting street is provided with a rotation mark which is aligned to the center of the exposure unit. The four rotation marks can be divided to two types, one is frame shape, and the other is rectangular shape. Two different rotation marks are arranged at the tail ends of the cutting streets, and can be measured through a machine aligning precision measurement in the current technical process without adding new machines. The lithography layout determines the deformation condition of first lithography through measuring two rotating marks so as to improve the deformation precision of the first lithography. The length and width of the cutting street are only half of the length and width of the cutting street in the prior art, so that the proportion of the dimension of the cutting street on a silicon wafer can be greatly shortened. The invention also discloses a method for measuring lithography deformation by adopting the lithography layout.

The invention relates to a passive bending axial rotation mechanism based on cambered surface free ends and three-reed crossed reeds. The whole multi-stage passive bending and axial rotation mechanismconsists of a plurality of crossed reed units with different sizes and varieties; and the structure of single crossed reed consists of two cambered surface free ends and the crossed reeds connected with the cambered surface free ends. Three reeds, the angle between two of which is 120 degrees, are crossed to form each crossed reed in charge of axial rotation deformation; the two ends of the reedare connected with the free ends; and when forming the passive bending and axial rotation mechanism, the reed units are connected by the corresponding free ends to form the multi-stage crossed reed structure. The passive bending axial rotation mechanism has the advantages of high precision, no friction, no hysteresis, no abrasion, no stiction, free of lubrication and the like, and can replace manysimilar passive deformation structures in the practical engineering application aspect.

The invention discloses a high-sensitivity C-arm CT device, which belongs to the field of photoelectric imaging. A high-sensitivity C-arm CT device includes a CT detector assembly. The CT detector assembly includes a detector protective shell, which is flexible and telescopic. The outer end of the shielding ring is connected with a number of matching load-bearing buffer components. Through the cooperation of the load-bearing buffer component, flexible telescopic shielding ring and isolated push component, it can effectively block the interference of the X-ray receiving plate and assist The cooler promotes the heat dissipation of the X-ray receiving board, effectively reducing the degree of temperature interference to the X-ray receiving board, thereby improving the stability of the signal conversion of the X-ray receiving board, improving the sensitivity of the CT detector components, and effectively improving the C-arm CT equipment. The image quality of the main body can effectively reduce the energy of X-rays, reduce the damage caused by the C-arm CT equipment main body to the patient's body, and improve the safety of the C-arm CT equipment main body.

The present invention is applicable to the field of computer technology, and provides a method and device for extracting the centerline of a tubular target. The method includes: performing preprocessing on the image to be extracted for the centerline of the tubular target to obtain a corresponding enhanced image, and obtaining a gradient vector of the enhanced image Flow field, according to the gradient vector flow field, obtain the deformation force parameters corresponding to the initial ridge line segment list and extract the tubular target ridge point in the enhanced image, generate the initial ridge line segment list, and establish a regularized open curve deformation model. When the deformation end condition is not reached According to the model, a ridge segment in the initial ridge segment list is deformed and processed to obtain the corresponding tubular target center segment, and the initial ridge segment list is updated according to the ridge segments traversed during the deformation process. When the deformation end condition is reached, according to the tubular target The center line segment generates the center line of the tubular target, thereby optimizing the deformation process of the ridge line segment, reducing the deformation time of the ridge line segment, and improving the accuracy and extraction rate of the center line.

The invention relates to a bearing deformation assembling workpiece. According to the technical scheme provided by the invention, the bearing deformation assembling workpiece comprises a substrate and a positioning support mechanism and a pressure mechanism which are arranged on the substrate, wherein the positioning support mechanism is used for supporting one side of the outer ring of a bearing, and the pressure mechanism is arranged on the opposite sides of the positioning support mechanism and used for applying a force onto the other side of the bearing outer ring; and a gap capable of accommodating the bearing outer ring is reserved between the positioning support mechanism and the pressure mechanism. The bearing deformation assembling workpiece has an ingenious and rational structure, is quick and convenient to operate and high in deformation precision, can greatly reduce the damage rate of parts and is favorable for reducing the manufacturing cost of the bearing. The positions of the positioning blocks of bearings with different specifications and sizes can be changed by a regulating positioner, and the bearing deformation assembling workpiece has a wide application range.

The invention discloses a high-exhaust type die-casting mold for an integrated lamp housing, which belongs to the field of die-casting molds. A temperature-variable exhaust cavity and an air cavity matched with the temperature-variable exhaust cavity are fixedly installed on the lamp housing die-casting mold body. The trough-type core is matched with the submerged air groove through the temperature-changing honeycomb composite bag. The temperature-changing honeycomb composite bag can absorb the airflow flowing in the submerged air groove, effectively improving the submerged air groove of the branch. The exhaust speed of the air groove can be improved, and the air in the die-casting gap can be pulled to reduce the residual air in the die-casting gap, so that the die-casting gap can quickly form a vacuum state, and the flow rate of the aluminum alloy metal liquid can be increased. While shortening the die-casting cycle, it can also effectively reduce the influence of air on the aluminum alloy metal liquid, improve the uniformity of the flow of aluminum alloy metal liquid, reduce the occurrence of air holes and shrinkage ribs on the die-casting integrated lamp housing, and effectively improve the quality of the die-casting integrated lamp. The molding quality of the shell.

The invention discloses a concrete temperature stress testing machine achieving mold separable vibrating. The testing machine comprises a main testing machine body, a concrete sample mold detachably connected with the main testing machine body, and a deformation measurement device. According to the concrete temperature stress testing machine achieving mold separable vibrating, mounting and demounting of the concrete sample mold and the main testing machine body are convenient, the concrete sample mold can be independently poured and vibrated after being demounted, the concrete sample mold is mounted on the main testing machine body for relevant temperature stress testing after the vibrating quality requirement is met, the pouring quality of concrete is greatly improved, and the credibility and comparability of the test result are better.

The invention relates to a passive bending axial rotation mechanism based on variable cross-section cross reeds. The entire multi-stage passive bending and axial rotation mechanism is composed of a plurality of cross reed units of different sizes and types. For the units that undertake passive bending , the free end of the arc surface is used, and the cross point of the cross reed overlaps with the center of the circle of the cross reed unit relative to the outer free end of the entire bending mechanism, which makes the offset of the cross point of each cross reed unit during passive bending deformation has decreased, making its deformation more accurate. The cross reed adopts a cross reed unit with variable cross section. The cross section of each reed is the thinnest at the intersection point and the thickest at the part connected to the free end, which enables greater passive deformation while ensuring deformation accuracy. The invention has the advantages of high precision, no friction, no hysteresis, no wear, no static resistance, no lubrication and so on.

The invention discloses a magnetostrictive shrapnel type micro-clamp driven by a Galfenol sheet, which comprises a pliers body, one end of the pliers body is closed, the other end is open, and a coil is wound outside the pliers body; The shrapnel is arranged oppositely, one end of the shrapnel is connected with the closed end face of the caliper body, and the other end of the shrapnel extends out of the opening end of the pliers body; two supporting pieces perpendicular to the shrapnel are arranged at the opening end of the pliers body, and one end of the supporting piece is connected to the shrapnel. The outer surface of the pliers is connected, and the other end of the support piece is connected with the inner wall of the caliper body; the Galfenol sheet is pasted on the outer surface of the shrapnel located inside the pliers body, and the maximum magnetostrictive direction of the Galfenol sheet is consistent with the length direction of the shrapnel. The invention utilizes the deformation of the Galfenol sheet in the magnetic field to drive the bending deformation of the shrapnel to realize clamping, the clamping range is large, the deformation precision is high, the driving voltage is low, and the reliability is good.

The invention discloses an anti-theft lock device, which comprises a circular support frame and a power supply. A pair of beams are symmetrically arranged at the front and rear ends of the circular support frame, that is, an upper beam and a lower beam. A pair of brake pads are elastically connected between them. The brake pads are divided into upper brake pads and lower brake pads. A set of shape-memory alloy springs are arranged between the corresponding sides of the upper brake pads and the lower brake pads. Each set of shape-memory alloy springs The alloy springs all include a one-way heat-shrinkable spring and a double-way heat-extensible and cold-shrinkable spring, and the two ends of the one-way heat-shrinkable spring and the two ends of the double-way heat-extensible and cold-shrinkable spring are respectively connected to the power supply through a brake switch and a transformer. The invention controls the input current signal to drive the shape-memory alloy spring so that the brake pad hugs the rotating disc, so as to achieve the purpose of locking the wheel. The device has a relatively simple structure, is easy to install, has low cost, and is beneficial to market promotion.

The invention relates to a multi-stage passive bending mechanism based on crossed reeds at free ends of cambered surfaces, comprising a plurality of free ends of cambered surfaces and crossed reeds; The adjacent free ends of the arc surface form a first stage, and the bending stiffness of each stage depends on the material, thickness of the reed, the angle between the two reeds and the position of their intersection; in the cross-reed bending mechanism based on conventional parallel free ends , the arc free end used in this scheme, and the intersection point of the cross reed and the center of the cross reed unit relative to the center of the outer free end of the entire bending mechanism, which makes the intersection of each cross reed unit passive bending deformation. The offset has been reduced, making its deformation more accurate. When the free end is subjected to external force, it is better to deform along its force direction.