48results about How to "Accurate coincidence" patented technology

The invention relates to a method for acquiring a colorful digital holographic image. The method is technically characterized in that a black and white type area array CCD and multiple recording wavelength lens-free fourier transform hologram recording optical path are used for respectively shooting a single-color digital hologram of an object to be recorded under the irradiation of red, green and blue laser; after the zeroing treatment of the acquired single-color digital holograms is carried out to acquire the corresponding zeroed digital holograms, the median filtering pretreatment is respectively carried out to acquire the corresponding median filtering pretreatment holograms, then the inverse fast fourier transform operation is carried out, and the acquired red, green and blue single-color digital holograms are respectively inputted into a three-layer zero matrix to acquire a colorful digital holographic image of the object to be recorded. According to the method, the position ofa reproduced image on a value reconstruction image plane is fixed by the distance between the recorded object on an object plane and a reference point light source during the recording and is not changed with the recording distance. In addition, the method has less constraint on the horizontal size of the object to be recorded and has a larger space-bandwidth product.

The invention relates to a double-cross-surface laser-directional minimally-invasive cranial drill which is a positioning perforating drill for taking out intracranial hematoma and is provided with a machine body, a driving mechanism and a bit, wherein the driving mechanism is arranged in the machine body, and the bit is connected with an output shaft of the driving mechanism in a coaxial way. The machine body is provided with two cross planar light lasers of which the intersecting lines are collinear with bit axes. Preferably, one planar light laser is fixed with the machine body, and the other planar light laser is wound with the bit axes of the machine body to be in transitional fit and rotating connection. Under the guidance of a three-dimensional benchmark determined by the surface of the head part, the head surface drawing lines of the layer surface of a hematoma center in each direction are calculated out according to data on a CT (computed tomography) photo and are overlapped with head surface cross drawing lines through cross planar light emitted by the lasers so as to imitate noninvasive quick and easy positioning and perforating performed by hematoma on different panels.

The invention discloses an adjustable high-speed laser cladding annular coaxial powder feeding nozzle. The adjustable high-speed laser cladding annular coaxial powder feeding nozzle comprises a centering basal body and a nozzle coaxially arranged; a focusing module sleeves the outer periphery of the centering basal body; the focusing module is connected with the nozzle, and drives the centering basal body to axially move to adjust gaps between a laser focal point and the surfaces of workpieces; the centering basal body extends in the radial direction to form a centering part; a centering end plate is arranged at the upper end of the centering part; the lower end of the centering end plate is fixedly connected with a centering base; a cavity for movably adjusting the centering basal body isformed between the centering base and the centering basal body; a horizontal adjusting piece for horizontally adjusting the centering basal body is arranged on the outer side of the centering base; and a dip angle adjusting piece for adjusting the axle inclination of the centering basal body is arranged at the upper end of the centering end plate. compared with the prior art, the adjustable high-speed laser cladding annular coaxial powder feeding nozzle can realize precise centering of the powder spot axle and the light spot axle and control of the defocusing amount, improves the powder utilization rate, and achieves a better cladding effect.

The invention provides a gyroscope flexible joint thin rib center coincidence adjustment device and an adjustment method thereof. A flexible joint in a workpiece is fixed on a rotary table of a device through a lifting screw of the device. the rotary table is rotated to calibrate a center of a thin rib of an inner flexible joint to coincide with a central surface of a reference hexahedron, then the rotary table is locked by utilization of a rotary table fastening screw, an outer flexible joint sleeves the inner flexible joint, the center of the thin rib of the outer flexible joint is calibrated to coincide with the central surface of the reference hexahedron, and then the outer flexible joint is fixed by utilization of a fastening screw. In the method, the device can calibrate the centers of the thin ribs of the inner flexible joint and the outer flexible joint accurately, reading is carried out through a tool microscope, quantification of rib aligning errors can be achieved, and thin rib stressing skewing and angle positioning error problems can be solved which are possibly caused by employing of a sliding block contact component plane rib aligning method at present.

The invention provides a spherical measuring prism with convenient adjustment and difficult-changed position of a glass pyramid. The spherical measuring prism comprises a sphere. A through hole penetrating through the sphere is opened on the sphere and the ball center of the sphere is on the axle wire of the through hole. The through hole is internally provided with a rear cover, a positioning corner, the glass pyramid and a front cover. The rear cover is installed in the through hole of the sphere and the glass pyramid is installed on the positioning corner while the front cover is installedin the through hole. The spherical measuring prism of the invention can drive the glass pyramid to move backwards by installing the front cover so as to ensure that three mutually vertical surfaces on the glass pyramid are closely contacted with the positioning corner, and accurately cause the superposition of the reflection center of the glass pyramid and the ball center of the sphere by controlling the working accuracy of components and back and forth adjustment when in installation, therefore, the position of the glass pyramid after installation is not easy to change.

The invention discloses a transplanter and a floating seedling fetching device and method thereof. The floating seedling fetching device comprises a positioning mechanism, a floating seedling jacking mechanism and a driving mechanism. The positioning mechanism is connected to a rack in a front-and-back moving mode. The floating seedling jacking mechanism comprises a floating frame, ejector pins and a positioning part. The floating frame is connected to the positioning mechanism in an up-and-down floating mode. The ejector pins are connected to the floating frame in a front-and-back moving mode. The positioning part is connected to the floating frame. Before seedling jacking, the driving mechanism drives the positioning mechanism to move forwards, after the positioning part moves forwards along with the positioning mechanism and is positioned through a seedling tray fixing mechanism, the driving mechanism drives the ejector pins to move forwards, and the ejector pins penetrate through corresponding seedling hole water leakage holes of fixed seedling trays on the seedling tray fixing mechanism. The floating seedling fetching device carries out two-direction movement for seedling fetching, positioning is carried out before each time of seedling fetching, it is guaranteed that the centers of the seedling hole water leakage holes in the seedling fetching positions of the fixed seedling trays can precisely coincide with the centers of the ejector pins, operation is reliable, maintenance is convenient, and working efficiency is high.

The invention relates to a multifunctional chassis fixture for a roundness measuring instrument to measure the molded lines of a piston. The multifunctional chassis fixture is provided with a lower positioning chassis and an upper rotary indexing positioning disk which are provided with an axial locking mechanism, wherein the lower positioning chassis and the upper rotary indexing positioning diskhave high roundness, and are coaxial and concentric with each other; positioning pin holes are formed in the edges of the upper disk and the lower disk; the area of a roundness measuring instrument base is increased, and a measuring diameter is increased; the lower disk and upper disk are indexed respectively through each positioning pin hole with an indexing accuracy of 55 divisions to 65 divisions, and the lower disk and upper disk perform indexed rotation; 1-degree indexing scribed lines are fabricated on the lower disk; the positioning pin holes and the roundness measuring instrument arematched with each other so as to perform indexed rotation with angle differences, are positioned through positioning pins and locked through the locking mechanism; and the long axis zero position of the piston skirt of the piston and the zero position of the roundness measuring instrument are corrected and overlapped with each other. The multifunctional chassis fixture has the advantages of convenient operation, simple production, low production cost, high detection precision, high measurement efficiency, high economical efficiency and high practicality, and can meet the universality measurement requirements of different types of pistons, and therefore, the popularization and use of the multifunctional chassis fixture can be facilitated.

The invention relates to a method and a device for true color 3D object holographic display. Colorful image information of a true color 3D object is decomposed into RGB coloring information which comprises component amplitude information and depth information of each color, and a multi-component-level phase type kinoform of each color component of the 3D object is calculated according to the depth information and amplitude information of each color component; image series formed by each color component kinoform are output respectively to three spatial light modulators with phase modulation capacity under the control of an isochronous controller, simultaneously relevant light of relevant color is adopted to illumine the kinoform carried by three spatial light modulator, beams modulated by the kinoform show the component information of RGB of an original true color 3D object, and holographic true color reappearance effect is obtained after integration of the component information. The invention designs a plurality of devices and provides a position relation setting method of key devices in an opto-electrical reappearance device. The invention can be used for holographic display of astatic or dynamic true color 3D object or scene.