49results about How to "Angle deviation is small" patented technology

The invention belongs to the technical field of precision measurement and the field of optical engineering, and particularly relates to an auto-collimation three-dimensional angle measuring device andmethod based on polarizing beam splitting. The device is composed of a light source, a polarizer, a beam splitter, a polarizing beam splitter, image sensors, a collimating mirror, a fixed plane mirror and a cooperative target. According to the method, a measuring beam is divided into two mutually perpendicular measuring light by the cooperative target, the measuring light returns after being reflected by the fixed plane mirror and the cooperative target, and corresponding images are separately formed on the image sensors; and the positions of the two images are adopted to calculate a pitch angle, a yaw angle and a roll angle of the cooperative target with respect to an optical axis, so that a capability of detecting a three-dimensional corner of the measured object space. Since the principle of optical lever amplification is adopted to the roll angle and is consistent with the measurement principle of the pitch angle and the yaw angle, therefore, the technical advantages of high precision and large working distance for the three-dimensional angle measurement are achieved, and the advantage that the measurement accuracy is increased under the same working distance or the working distance is increased under the same measurement precision is achieved; two measuring light spots are received by two image sensors, the requirements for the subsequent image processing technique is reduced, and the frequency response of the measuring device is improved; and in addition, the designed cooperative target has the technical advantages of simple structure and low production cost.

The invention discloses a forming method for a latticed composite material bearing cylinder applicable to a satellite, and an angle deviation is small; a multi-axis numerical control winding machine high-precision winding method is adopted, the theory fiber orientation angle deviation is within +/-0.5%; through automatic cutting of a numerical control cloth cutting machine, the laying angular deviation can also be controlled within +/-0.5%; at the same time, a line is carved on a forming mold, the total laying angle deviation of a pre-immersing material is within +/-1%. Latticed ribs, covering skins and stringers are co-cured, the glue-joint surface lamination defect and the negative glue applying amount are reduced, the axial stiffness is improved to a greater degree, and the integral bearing capacity of a composite material is improved. The latticed ribs and the covering skins are wound integrally, an upper end frame and a lower end frame are rolled flatly to enhance by the latticed ribs, cylinder body flange assembly and T-shaped stringer laying and integral co-curing are adopted, and all the processes can improve the structural stability of a product.

The invention belongs to the technical field of medical apparatus and instruments, and particularly relates to a personalized atlantoaxial pedicle screw step-by-step navigation template device. The device is characterized in that the system comprises a positioning guide plate, a drilling guide plate and a tapping guide plate, the template assists each operation of screw placement according to thenail arrangement sequence one by one, expanding is conducted step by step, and the accuracy is improved. Accordingly, the guide plates are independently attached to the bone, the phenomenon that closeattachment cannot be achieved along with the change of the position in an operation cannot occur, the screw placement accuracy rate achieves 100%, and the very good accuracy is achieved.

The invention relates to a strain sensor, a structure monitoring system and a manufacturing method. The method comprises: directly printing nano metal slurry on a surface of a structure based on a 3Dprinting technique; and solidifying to form a conductive trace for monitoring structural strain. The line has a width as low as tens of microns, a thickness as low as several microns and a small space, can be printed on composite bonding areas with minimal impact on the quality of the bond. The strain sensor, the structure monitoring system and the manufacturing method can be applied to health monitoring of large and complex composite structures. The conductive trace of the invention can realize the sensing of the structural strain and information transmission function through reasonable design, thereby realizing the safety monitoring and evaluation for the structure in total life cycle, and providing the necessary guarantee for the reuse of future advanced aircraft.

The invention relates to an optical system, a camera module, camera equipment and a carrier. The optical system includes a first lens element with negative refractive power, a second lens element with negative refractive power having an object-side surface being convex in a paraxial region and an image-side surface being concave in a paraxial region, a third lens element with positive refractive power having an object-side surface and an image-side surface being convex in a paraxial region, a fourth lens element with positive refractive power having an image-side surface being convex in a paraxial region, a fifth lens element with negative refractive power having object-side and image-side surfaces being concave in paraxial regions, a sixth lens element with positive refractive power having an object-side surface and an image-side surface being convex in a paraxial region, and a seventh lens element. The optical system satisfies the following relation: 18.5 mm<f1*f2/f<23.3 mm, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f is the effective focal length of the optical system. The optical system has the characteristic of large visual angle and also has excellent imaging definition.

The invention relates to a slotting method for herringbone gears with narrow clearance grooves. In the machining process, machining parameters are corrected by detecting the deviation of the center angles of tooth grooves of two gears, inverse compensation is carried out to reduce the deviation of the center angles of the tooth grooves of two gears, and then the centring value of the herringbone gears can be obtained through mathematical transformation. According to the invention, the centring value of the herringbone gears with the diameter of the outer circles greater than 500 mm can be controlled within 0.1 mm.

The invention provides a hoisting tool suitable for transportation and mounting of a wind power generation tower, belongs to the technical field of wind power generation tower hoisting, and aims to solve the problem of low efficiency in transportation and mounting of the wind power generation tower. The hoisting tool comprises a locking mechanism and a support mechanism, wherein the support mechanism comprises a mounting block; a mounting cabin is formed inside the mounting block; a hanging mechanism is arranged inside the mounting cabin; the locking mechanism comprises a first connection block and a plurality of electromagnets; the first connection block is fixed to one side of the mounting block; two slide bars are fixed to the side surface of the first connection block; a second connection block is fixed to the end parts of the slide bars; a first lead screw is rotationally arranged between the first connection block and the second connection block; an adjusting mechanism is arranged on one side of the second connection block; two slip rings are arranged above the slide bars; a plurality of rotating rods are rotationally arranged on the slip rings; and the end parts of the rotating rods are rotationally connected with the electromagnets. Through adoption of the hoisting tool, the efficiency in transportation and mounting of the wind power generation tower can be improved effectively.

The invention relates to municipal road pipe-jacking construction safety equipment and a construction method thereof. The municipal road pipe-jacking construction safety equipment comprises a base, a base block arranged on the base, a pipe-jacking assembly installed on the base block, a fixing plate arranged on the base and a pipe clamping assembly installed on the fixing plate. The base is of a frame shaped structure. The base block and the fixing plate are both rotationally connected with the side walls of the two sides of the base, and an adjusting assembly used for adjusting the inclination angle of the base block and the inclination angle of the fixing plate at the same time is arranged on the base. Before pipe-jacking construction is conducted, a worker only needs to adjust the inclination angle of the base block and the inclination angle of the fixing plate at the same time through the adjusting assembly according to the construction requirement, so that the inclination angle of the base block and the inclination angle of the fixing plate are kept consistent, and therefore pipe-jacking construction can be conducted on a pipeline through the pipe-jacking assembly conveniently. The angle deviation existing after the pipeline is installed is reduced, and the pipeline installation precision is improved.

The invention discloses a body type classification method based on contour features and a matched rotary shooting device thereof. The body type classification method comprises the following steps: (1)human body photo shooting; (2) human body size extraction: determining feature points on the edge of the human body image to obtain the size of a human body feature part; respectively researching andclassifying the parts of the human body to obtain characteristic parameters which have great influence on the human body form; and (3) body type classification: according to the characteristic parameters obtained by the five parts of the human body, concluding the main body type of each part, respectively subdividing the five parts of the young female body, and carrying out morphological analysison the body type of each part. Starting from local characteristics of a human body, a three-dimensional human body measurement technology, and related theories and experimental technologies of three-dimensional human body modeling are researched and combined. A matched shooting device is researched and developed, images of the front face and the side face of the human body can be accurately measured by means of the rotary shooting device, and the angle deviation is extremely small; and the shooting device can realize shooting at different angles without configuring a plurality of cameras.

The invention discloses a manual probe bending machine, and belongs to the technical field of probe card manufacturing equipment. The manual probe bending machine comprises a working table-top; a probe clamping mechanism connected with a transmission device, an X-direction locating mechanism and a probe bending mechanism are arranged on the working table-top; the end part of the X-direction locating mechanism and the end part of the probe clamping mechanism are located on the probe bending mechanism; and the transmission device is connected with a driving handle. Through technological innovation, a probe after probe bending can meet the design requirements, the quality of the probe can reach the standard, the operation is simple, and the production cycle and the efficiency are improved; the operation by multiple workers in one post can be realized better, and the operation of the manual probe bending machine can be learned and mastered easily, so that the training and education cost of an enterprise can be saved; the deviations of the length and the angle of the probe after the probe bending are reduced to the greatest extent, the precision of the probe for the manufacture of a probe card is improved, and the production requirements are met; and with the additional adoption of a Y-direction clamping auxiliary strengthening device, probe bending work on the probe with the diameter being greater than 350 micrometers can be realized.

The invention discloses an automatic time collection method for turret clock based on a Beidou and GPS double-satellite system. The method enables time data to be converted into relative angles of each clock hand relative to the original point (12 o'clock) of a clock face, and breaks through a conventional transmission system where a gear ratio is fixed among a hour hand, a minute hand and a second hand, i.e., a mechanical clock movement which is relatively complex in design and manufacturing. The method employs a mode of closed loop control, and enables each hand to be quickly and accurately positioned at a correct time representation position through a universal part in a gear transmission manner. Therefore, the method irons out the defects of various types of control systems, guarantees the synchronization of a pointer-type turret clock with digital time, does not need a person to be on duty, and can solve a difficulty that a pointer-type clock in a public place is not accurate fundamentally.

The invention relates to a cycloidal gear grinding tool that comprises a base, and a supporting plate, a middle liquid expansion mandrel, a liquid adding groove, a plunger, a hydraulic expansion sleeve, a conical surface gasket, a spherical surface gasket, a round nut, a tool pressing plate, a fixing nut, a convex ring, a side hole mandrel expansion sleeve and a mandrel pressing plate are arrangedon the base. When in use, two cycloidal gears are oppositely placed, so cycloidal gear teeth can be conveniently machined, and the problems that alignment of the teeth is difficult and the like in arelative stacking placement mode are solved; meanwhile, the hydraulic expansion sleeve deforms due to liquid pressurization, and the positions of the two cycloidal gears are more accurate due to the special-shaped side hole mandrel expansion sleeve; and finally, due to pressing of the tool pressing plate, the angle deviation is smaller when the cycloidal gear is machined, and the machining qualityis effectively improved.