96results about How to "Eliminate tilt" patented technology

The invention discloses a three-degree-of-freedom aerial photographic head with the stable inertia, which comprises a stabilizer, a transmission device and a camera. The three-degree-of-freedom aerial photographic head with the stable inertia adopts a main principle that a mechanical gyro with the considerable inertia realizes stable shooting. A head bracket is connected with a horizontal rotating rack; the horizontal rotating rack is connected with the mechanical gyro to form the stabilizer; and the stabilizer is connected with the camera through the transmission device, so the synchronous movement of the gyro and the camera in the vertical direction can be realized and the stable shooting of the camera can be realized by the stability of the gyro. The three-degree-of-freedom aerial photographic head with the stable inertia can eliminate the influence of the high-frequency and low-frequency vibration of a plane on the aerial photographic images and the problem of image inclination which is caused by the inclination of the plane, can photograph very clear and stable images without any chattering removal treatment and has good application effects in aspects of line detection, fixed-point monitoring, aerial photograph and the like. The three-degree-of-freedom aerial photographic head with the stable inertia has novel design and strong stability and can meet requirements on most high-quality aerial photographs.

A method of fabricating a photonic device comprises the steps of providing a core pattern of waveguide core material (1) on a base layer (3) and applying a cladding layer (2) over the core material 1 and the base layer (3). The height of the surface of the cladding layer (2) over the base layer (3) varies in dependence on the pattern of core material (1). The core pattern is designed with at least two reference regions, each having a width w that is selected to provide a peak of the cladding layer (2) with a predetermined height hl over each reference region. The core pattern is further designed such that a line between the peaks of the reference regions is higher than any intervening peaks of the cladding layer, whereby the peaks of the reference regions provide a vertical alignment reference.

The invention belongs to the technical field of digital images, and particularly relates to a grid-optimization-based registration method suitable for free view angle image splicing. In recent years,due to the application prospect in the fields of virtual reality, medical imaging and the like, the panoramic image is greatly concerned. The image registration is mainly used for obtaining position parameters of each image in a panorama. Traditional image registration needs to execute a series of operations such as feature point extraction, matching, homography matrix solving and camera parametercorrection. According to the grid-optimization-based registration method, a grid optimization-based registration method is used for replacing a classic registration technology, so that the speed is obviously improved, and the grid-optimization-based registration method is suitable for splicing images with large parallax shot at a free visual angle. According to the grid-optimization-based registration method, ORB rapid feature extraction is used for obtaining feature points of an image, and a strategy of step-by-step coarse and fine matching is introduced, and finally, three constraint termsbased on grid optimization are introduced, and an error function minimization method is used for obtaining optimal registration parameters between the images.

The invention provides a method for calibrating the empty roll gaps of a sheet and strip cold-rolling mill. The sheet and strip cold-rolling mill comprises at least two mill frames or a single frame respectively with an upper working roll and a lower working roll which can be adjusted if necessary. The method comprises the following steps: step one: the frame lifts up rolls to the top; step two: the rolls are preliminarily calibrated: opening a roll gap, applying contact rolling force to enable the roll gap to be closed, gradually overlaying delta T1 down-pressing inclination in the direction reverse to the inclination direction of the roll gap, executing step four when the detected rolling force deviation is within the allowable range; executing step three when the inclination direction of the roll gap is changed when being compared with the previous time; and suspending roll calibration when the repeated times exceed the allowable maximum times n max; step three: the rolls are fine calibrated: in the inclination direction of the roll gap, gradually reducing down-pressing inclination delta Ti, wherein the i being more than or equal to 2, the i belongs to N and |delta Ti| being less than |delta T (i-1)|, and executing step four when the detected rolling force deviation is within the allowable range; and step four: roll calibration is ended.

A base support structure eliminates tilting of laptops and similar user devices. The base support structure comprises at least one back foot and at least one front foot that is constructed using a first material bonded to a second material. The first material has at least one cavity and is designed to provide a contact mechanism designed to withstand an impact of a touch screen interaction force and/or a radial force when opening or accessing the display. The contact mechanism secures the laptop to a solid surface on which the laptop is placed with at least a first amount of force. The front foot/feet and the back foot/feet are attached to a base housing of a base segment of the laptop and separated by a relative spacing pre-determined to enable enhanced stability of the laptop.

The method for raising photoetching resolution is characterized by that in the air gap being in chrome film pattern on the masket plate photoetched by adopting closing or contact mode and in the air layer space between masked plate chrome film and photoresist layer on the silicon chip a transparent material whose refractivity is greater than that of masked plate is filled, and the surface of saidtransparent material layer which is positioned in air layer space and contacted with photoresist layer is polished, so that when it is photoetched, the transparent material is filled, therefore the refracted angle of light beam is reduced, diffraction distance is reduced, diffraction effect can be effectively weakened to raise the photoetching resolution.

The invention belongs to the technical field of remote sensing and mapping, and specifically relates to a non-vegetation-covered area airborne LiDAR data echo intensity value correction method. The method includes following steps: performing primary correction of an echo intensity value based on the flying height and the laser point elevation value, and performing homogenization on the influences of the laser transmission distance on the echo intensity value; calculating the tendency angle values of laser points point by point by setting a threshold determination condition and taking the plane distance value, the elevation value and the echo intensity value as references based on LiDAR data after primary correction; and calculating the reflection angle with the combination of the tendency angle and an incidence angle, and performing correction calculation on the echo intensity value of the original LiDAR data again. According to the method, the technical problem of difficult realization of airborne LiDAR data echo intensity value correction of non-vegetation surface features, especially inclined surface features in the prior art is solved, the airborne LiDAR data echo intensity value can better reflect the surface feature media attributes, and the application values thereof in surface feature classification and identification are improved.

The invention provides a load testing device which can rectify the inclination of a weight so as to bear the load in the vertical direction of an object to be tested. The load testing device (1) is configured that lower soft bearing components (51-54) are used for supporting from below in a manner that the positional postures of the weight (40) are variable, the upper inclination, caused by a horizontal drive (30) of the weight (40), of a holding part (72) in the moving direction is detected, and based on the detected inclination of the weight (40), the shapes of the lower soft bearing components (51-54) vary in a manner that the posture of the weight (40) is set as a ruled standard posture.

The invention discloses an interferometer with two-path output and double corner reflectors, which comprises a beam splitter, two fixed planar speculums, and two scanning corner reflectors that are fixed back to back by a rigid structure and taken as an individual moving part; the first planar speculum and the second planar speculum are symmetric with respect to a half reflecting plane of the beam splitter, and the two planar speculums form an included angle of 22.5 degrees with the half reflecting plane of the beam splitter; the double corner reflectors move repeatedly and straightly along the normal line direction of the half reflecting plane of the beam splitter; the optical path difference is 4 times of the displacement of the double corner reflectors. The interferometer generates light beams that are output in two paths and received by two detectors; the two-path signals of the detectors have same amplitudes and opposite phases, and the phase difference forms an interference pattern. The interferometer eliminates the strength distortion that is most important in Fourier transformation spectrum and caused by the nonlinearity of the detectors, absolutely eliminates the leaning and swaying problems, and is applicable to Fourier transform spectrometers with high distinguishability in various spectrum regions.

An equalizer and methods for equalizing a cable-borne signal are described. The cable-borne signal includes a digital signal and a baseband analog signal separated by frequency. Distortions are removed from the digital signal and an analog equalizer compensates for attenuations of the analog signal caused by the cable based on equalization settings of a digital equalizer. A baseband analog filter can be selected based on an estimate calculated by the digital equalizer of difference in attenuation at different frequencies.

The power input to the light source of a microscope is varied as necessary to maintain a constant degree of detector saturation as the objective is moved toward a best-focus position. Focus is found by tracking the source's intensity necessary to maintain the detector irradiance at a constant level. The in-focus position is reached when the power input (and correspondingly the intensity of the light emitted by the source) reaches a minimum. The concept can be applied in a similar manner to minimize or eliminate tilt in a sample.

A three-dimensional surface topography measuring method for a large-size workpiece comprises scanning a workpiece surface through a white light wavelength scanning interferometry method, obtaining a series of sub-surface images through a white light wavelength scanning interferometry, wherein during the scanning process, the measured workpiece moves along a snake shape, zone overlapping is formed between the adjacent sub-surface images, and the sub-surface images form into sequence surface topographies; searching coordinate positions between the sequence surface topographies and dual mapping transformation in a gray level and enabling the sequence surface topographies to be aligned in topology and geometry; achieving accurate rectification of coordinates of the sub-surface images through a transform domain based rectification method; fusing a plurality of groups of sub-surface image data in overlapping zones of the two adjacent sub-surface images through a wavelet transform method and fusing the sub-surface images into a topology image. The three-dimensional surface topography measuring method for the large-size workpiece has the advantages of obtaining complete three-dimensional surface topography information of the large-size workpiece and enabling the image to have advantages of high lateral resolution information.

A quick-mountable nut, which is capable of at least partially rotation-free axial displacement relative to a threaded bolt (22; 52), includes a nut housing (2; 45), and a springy holding member (4; 49) at least partially located in the nut housing (2; 45) and engaging in at least one screw thread (24; 54) of the threaded bolt (22, 52), with the central through-opening (3; 47) of the nut housing being formed as a tapering radially inward, inner cone (9; 48) for receiving the holding member (4; 49), and with the holding member (4; 49) having two, resiliently movable relative to each other, holding sections (5.1, 5.2; 50.1, 50.2) having each an even wall section abutting a wall of the inner cone (9, 48).

The invention relates to an interferometer, in particular to a double-sided reflecting moving mirror interferometer, which can solve the inclination and transverse movement problems of a moving mirror, requires a small driving force, can obtain very high spectral resolution and has good heat stability. The interferometer comprises a beam splitter, a planar mirror, a double-sided reflecting moving mirror, an angle reflecting body, a double-sided reflecting mirror driving system and a detecting and collecting system, wherein the beam splitter splits incident light into reflected light and transmitted light; the planar mirror and the angle reflecting body are arranged on two light paths respectively; the double-sided reflecting moving mirror is arranged on reflecting light paths of the planar mirror and the angle reflecting body; the double-sided reflecting moving mirror reflects incident light which enters the double-sided reflecting moving mirror and reflects the incident light reflected by the planar mirror to the beam splitter; and the detecting and collecting system is arranged on an emergent light path which is finally transmitted or reflected by the beam splitter. The double-sided reflecting moving mirror is used, so that the transverse movement problem of the moving mirror is solved; an interference light path is adopted, so that the inclination problem of the moving mirror is solved; and the interferometer has the advantages of simple structure, small volume, light weight and small required driving force.

The invention relates to the technical field of foundation construction, and discloses a foundation reinforcing and deviation rectifying method. The method comprises the following steps that anchor rod steel bars are implanted around a first pile hole, an anchor rod static pressure steel pipe pile is constructed, a deep soil body is repeatedly subjected to extruding and grouting through the steelpipe pile, and after grouting is completed, a pressurizing assembly is installed and the steel pipe pile is temporarily locked; and a second pile hole is formed in a foundation ground to be constructed, a grouting steel pipe is inserted into the second pile hole, the grouting steel pipe conducts local directional reinforcing on a shallow soil body in a repeated grouting mode as well, a pressure value of the steel pipe pile is monitored in the grouting process, and gradual re-pressing is conducted on the steel pipe pile through the pressurizing assembly, so that slow reinforcing and lifting ofa settled soil layer and deviation rectifying of a foundation are achieved. According to the method, through repeated multi-time multi-point grouting of the deep soil body and the shallow soil body and gradual re-pressing of the steel pipe pile, the settled soil layer is slowly reinforced and lifted, directional deviation rectifying is conducted on the foundation, uneven settlement and overall building inclination that have occurred can be effectively reduced or eliminated, and reinforcing and deviation rectifying are combined.

The invention discloses a supper deep construction vertical well parallel connection suspension platform position adjustment system and method. The system comprises a suspension platform, floating head wheel adjustment devices arranged symmetrically on both sides above the suspension platform, and the outer sides of the floating head wheel adjustment devices on both sides are respectively provided with a middle head wheel and a reeling tank; and the reel is wound with a suspension steel wire rope wound through the middle head wheel and the floating head wheel adjustment devices, and the front end of the suspension steel wire rope is fixed to the suspension platform. A gear on the end portion of a screw column is driven by adopting a motor driving device, the working principle of screw rotation and nut movement in a ball screw is utilized, a floating block is driven to lift through screw column rotation, thus the head wheel is driven to rotate, adjustment of the suspension platform position is achieved, the tension and length of the suspension steel wire rope can be adjusted, so that the tilt angle and height of the suspension platform is adjusted. According to the super deep construction vertical well parallel connection suspension platform position adjustment system and method, the structure is simple, operation is convenient, installation and disassembly are convenient, tension adjustment is accurate, and the range of application is wide.

The invention discloses an optical rotary table, which is formed by a driving source, a roller lead screw, a nut, a sliding block, a guide plate, a connecting rod, a middle post, a bearing, a plate, a base, a roller sheath, a rolling guide rail, a tension spring, a read block and a pointer. Wherein, said optical rotary table is left and right symmetry; the connecting rod, plate, roller guide rail, roller, roller sheath, read block and point are both distributed one group at the left and right of symmetry line. The invention has simple structure and easy installment, while two groups of optical elements rotate coaxially in reversed directions synchronously and the rotate angle difference can be accurately adjusted.

The invention discloses an automatic double-station rapid sample milling device, which contains a bed, a box, a workbench, a main shaft device, an X-axis guide rail, an Y-axis lead screw, a synchronous pulley, a clamping device, a positioning cylinder, a clamping air motor, a tool exchange cylinder, a knife bar, a cutterhead, a dust shield, a cutting hopper, an X-axis servo motor, an elevating servo motor, a rotary servo motor, a PLC electric cabinet and a touch screen, wherein the clamping air motor, the tool exchange cylinder, the X-axis servo motor, the elevating servo motor and the rotary servo motor are respectively connected with the PLC electric cabinet; the PLC electric cabinet is connected with the touch screen; there are two sets of the main shaft device and the tool exchange cylinder, the knife bar, the cutterhead and the rotary servo motor which match with the main shaft device, and the cutterhead in one of the sets is one with inner converse angle. The sample milling device provided by the invention has a reasonable structure, is easy and convenient to operate, has high sample processing quality, and is safe and reliable.

The invention provides a package type semiconductor device and a manufacturing method thereof where reliability is improved without increasing a manufacturing cost. A resin layer and a supporting member are formed on a top surface of a semiconductor substrate formed with pad electrodes. Then, openings are formed penetrating the resin layer and the supporting member so as to expose the pad electrodes. Metal layers are then formed on the pad electrodes exposed in the openings, and conductive terminals are formed thereon. Finally, the semiconductor substrate is separated into semiconductor dice by dicing. When this semiconductor device is mounted on a circuit board (not shown), the conductive terminals of the semiconductor die and external electrodes of the circuit board are electrically connected with each other.

The invention provides a miniaturized light-weight design and preparation method of an optical lens and the optical lens, and solves the problems that when the number of lenses of an existing optical lens is large, the assembly difficulty is large, time and labor are consumed, and the imaging quality is difficult to guarantee. The method comprises the following steps: 1) processing a corresponding mirror frame according to each optical glass, each mirror frame being a thin-wall structure, one end being provided with a first glue injection hole along the radial direction, and the other end being provided with a flange structure; assembling each piece of optical glass to the corresponding mirror frame, injecting an adhesive between the optical glass and the mirror frame, and forming each mirror group by each piece of optical glass and the corresponding mirror frame; 2) mounting the mirror frame on a centering lathe through the flange structure, finely turning the outer circle of the mirror frame, and cutting off the flange structure of the mirror frame; and 3) sequentially installing the lens groups in a lens barrel, arranging space rings between the adjacent lens groups, arranging a limiting structure at one end of the lens barrel, in the installation process, trimming the thickness of each space ring, and therefore, the optical interval between the two adjacent lens groups is guaranteed; and arranging a pressing ring at the other end of the lens barrel to axially pre-tighten and fix the lens group.