693 results about "Symmetric axis" patented technology

The present invention relates to an improvement of a total internal reflection lens whereby a tilted symmetry axis leads to a net deflection of the output beam away from the surface normal of the exit surface. Linear TIR lenses have a net deflection transverse to their focal strip. Circular TIR lens profiles going beyond 90° are tilted to bring the rim level with the source, the deflected rays exiting the lens to form an off-axis beam.

The invention discloses a multi-axial inertial sensor and a method for measuring multi-axial translatory motion and rotating acceleration. The sensor includes a frame moving along a spindle, one or more pair of inductive mass blocks and an outer elastic structure. Each inductive mass block is hanged on the frame by an inner elastic structure, the symmetric axis of the inner elastic structure is consistent with the symmetric axis of the hanged inductive mass block, the frame is hanged on a sensor platform by the outer elastic structure; the inner elastic structure and the inductive mass block are installed to lead the centers of mass to deviate with each other along the direction of the spindle, and the outer elastic structure and the frame are also installed to lead the centers of mass to deviate with each other along the direction of the spindle. The multi-axial inertial sensor of the invention can measure a plurality of axial acceleration and rotation at the same time, which has high resolution, rather low inter-axle crosstalk sensitivity and strong resistance to environmental noise, and produces with low cost and mass.

The invention presents a wide-angle imaging assembly which comprises a main lens produced from an aspheric optical block. The aspheric optical block comprises a vertical axis of symmetry; a transparent upper surface, at least part of which is capable of reflecting rays that impinge upon it from the interior of the optical block; a transparent perimeter surface; and a transparent lower surface. The optical block is fabricated from material selected to enable optical transmittance of a specific spectral range. Light rays in the specific spectral range originating in a first scene, having a 360 degrees panoramic perimeter, are refracted by the transparent perimeter surface, enter the optical block, are then reflected by the upper surface towards the transparent lower surface, where they are then refracted by the transparent lower surface, and exit through it.

An electronic component capable of being assembled into a module in the form of a stack of a plurality of layers is provided. Terminals of terminal groups (31 to 36) are formed so as to have rotational symmetry of a predetermined fold-number or have rotational symmetry and symmetry with respect to the plane containing a symmetric axis line. The terminals (A0 to A7, RFCG) of common connection terminal groups (32, 36) have connecting portions formed on the both surfaces in a stacking direction. Among the terminals of individual connection terminal groups (31, 33), a specific terminal CS; KEY has a connection portion formed at least on one of the both surfaces in the stacking direction while the remaining associated terminals NC; DMY have connection portions formed on the both surfaces in the stacking direction. When such electronic components (20) are stacked so as to be shifted from each other by the angle obtained by dividing 360 degrees by the predetermined fold-number or in addition in the inverted state, it is possible to assemble a module using the electronic components (20) having the same configuration.

The invention provides a method and a system for transforming a map coordinate system. The method comprises the following steps: taking a coordinate point A in a map range of the current map coordinate system, and setting the coordinate point A as an original point of a two-dimensional coordinate system; transforming the coordinate point A to obtain a coordinate point A' by utilizing a coordinate transformation algorithm, and solving a mirror-image coordinate point B of the coordinate point A' about a symmetric axis of y=-x, wherein y is a longitudinal axis of the two-dimensional coordinate system, and x is a transverse axis of the two-dimensional coordinate system; transforming the mirror-image coordinate point B to obtain a transformed coordinate point B' according to the coordinate transformation algorithm; transforming the map coordinate system according to a longitude and latitude corresponding relation of the coordinate point A and the transformed coordinate point B'. By adopting the method and the system, the longitude and latitude among different geological coordinate systems can be mutually transformed freely, an effective and feasible corrective method can be provided for the coordinate encryption algorithm, the longitude and the latitude among different SDK (software development kit) of different maps can be corrected, and the precision and working efficiency for collecting the map information can be improved.

The invention discloses a structure for improving the cooling efficiency of a gas film of a discrete hole, which relates to a gas turbine technology and is used for cooling a turbine blade for a gas turbine and the gas film of the wall surface of a combustion chamber. In the structure, a bulge is placed adjacent to the rear part of the outlet of a gas film cooling hole, the bulge is bilaterally symmetrical by taking a central line of the gas film hole as a symmetric axis, the width of the bulge is about two times the diameter of the gas film hole, the ratio of the length to the width of the bulge is about 1, and the height of the bulge is about one fourth the diameter of the gas film hole. The bulge has the following three functions that: 1, cooling air is transversely extended, and the transverse coverage area of an atmosphere area can be increased; 2, the rotation direction of a cooling air kidney-shaped vortex pair at the outlet of the conventional gas film can be changed, and the cooling air can be adhered to a wall surface conveniently; and 3, the low bulge height guarantees that most of gas film cooling air is adhered to the wall surface again after axially flowing around the bulge and the cooling air is provided for the newly produced vortex pair. The bulge of the structure has a small size and low height, so that the additional flow loss is very low. The structure is suitable for cooling all gas films in a discrete hole form.

The invention provides a non-pneumatic safety tire, which comprises a tread, an outer ring, a support body and an inner ring from the outside to the inside in order. The tread is bonded or vulcanized on the outer ring, the support body is arranged between the inner ring and the outer ring along the radial direction and circumferential direction from the outer ring, multiple groups of damping units and support ribs, each group of damping unit consists of two sets of damping structures, and two sets of damping structures are circumferentially disposed with the radial direction as the symmetric axis. The non-pneumatic tire provided by the invention has good bearing capacity, and by means of wheel disk thickening and multiple damping hole diameter change, the bearing capacity of the tire can be enhanced. The non-pneumatic safety tire not only has the carrying capacity and static rigidity characteristics of pneumatic tyres, but also has rationally distributed ground pressure, the abrasion resistance and trip distance of the tire are increased, especially the reasonable distribution of multiple damping holes and support ribs in the radial and circumferential direction can enhance the carrying capacity of the tire and also can improve the static rigidity of the tire.

The invention relates to the technical field of 3D (three-dimensional) display, and provides a lenticular lens grating, a liquid crystal grating and a display device. The lenticular lens grating comprises a plurality of lenticular lenses arrayed in parallel, wherein an interval part is arranged between at least two adjacent lenticular lenses, and is a first plane vertical to a central shaft of the lenticular lenses; and / or the middle part of an upper surface of at least one lenticular lens is a second plane which is vertical to a central shaft of the lenticular lens and is symmetrical with the central shaft of the lenticular lens as a symmetrical axis According to the invention, the structure of the lenticular lens grating is improved, so that a black matrix figure on a color filter cannot be refracted by the lenticular lenses so as to deformed, the phenomenon of moire effect is inhibited effectively, and the 3D display effect is obviously improved. In addition, the invention further discloses a manufacturing method of the lenticular lens grating, parameters of the grating can be flexibly adjusted according to structural characteristics and actual process of the display so as to achieve an ideal display effect, the development difficulty of the process is greatly reduced, the develop process is simplified, and the yield of products is improved.

The invention relates to an RFID in-and-out recognition system and an in-and-out recognition method thereof. The RFID in-and-out recognition system comprises an RFID tag, directional antennas and an RFID in-and-out recognizer, the number of the directional antennas is two or the multiple of the two, one half of the antennas are slantly installed inside an in-and-out channel, the other half of the antennas are slantly installed outside the in-and-out channel, the directional antennas inside and outside the in-and-out channel are mutually symmetric by using a door as the symmetric axis, and the directional antennas are connected with the RFID in-and-out recognizer through feeder lines. The in-and-out recognition method comprises the steps of judging that the RFID tag enters or leaves the recognition region from the exterior of the door or the interior of the door, therefore, judging the situation of door entry and exit conditions of the RFID tag, and therefore achieving the recognition of entry and exit of the human body or an object with the RFID tag. According to the system, wiring is easy, maintenance is convenient, the installation distance is not limited, and the recognition accuracy is high.

A face detecting system using a symmetric axis, the system including: an image inputting unit for inputting a still image thereto; an image converting unit for reducing the inputted image to a first certain size of image for a real-time process by using a pyramidal resolution reduction way; a scanning unit for scanning the reduced image by applying a second certain size of symmetric mask; a region dividing unit for dividing a region of the scanned mask into a left region and a right region with respect to the symmetric axis; a symmetric-similarity computing unit for computing a symmetric similarity of a local region (Symmetric_measure_local) at the two divided regions and then computing a symmetric similarity of a global region (Symmetric_measure_global) to compute a symmetric similarity of a face region; and a face region extracting unit for extracting a region having a symmetric axis at which the computed symmetric similarity is above a predetermined value, as the face region.

Disclosed is a dual module integrated humidity sensitive chip with heating function and low power consumption as well as a making method thereof, relating to a sensor chip and a making method. The chip and method improve the applicability to environment with fast changing of temperature and humidity of a humidity sensor having the integrated heating function and reduce the power consumption when heating, and the invention provides the dual module integrated humidity sensitive chip with heating function and low power consumption as well as the making method by adopting a mono-crystalline silicon material as a substrate and combining the semiconductor technique and the micro-machining technique. Two humidity sensor modules having the same structure are symmetrically arranged at both sides of a thermal isolation through groove on a symmetric axis of the sensor structured substrate, the bottom parts of the humidity sensor modules are provided with a heating resistor on which a humidity sensitive capacitor is arranged, and the two ends of the heating resistor, and a porous capacitance upper polar plate and a capacitance lower polar plate of the humidity sensitive capacitor are respectively led out by an electrode. The sensor chip of the invention has advantages of good reliability and stability, small volume, low cost and convenient processing in batches, and can be applied to the making of various humidity sensors.

The invention provides an aflatoxin detecting and sorting apparatus. The apparatus comprises a plurality of ultraviolet light sources, a material slide rail, and optical signal receiving devices positioned at the front and back sides of a material to be detected respectively, the ultraviolet light sources are symmetrically distributed at two sides of the tail end of the material slide rail through treating a material falling locus as an symmetric axis, the ultraviolet light sources irradiate the surface of the material and excite the fluorescence of the material, and the optical signal receiving devices collect the R, G and B fluorescence signals of the same material in a same position, convert the R, G and B fluorescence signals to electric signals, and combine the three-way electric signals to form a color image. The apparatus has the advantages of online obtaining the weak color fluorescence signal of the material, convenience for the effective distinguishing of the aflatoxin material, and improvement of the online recognition rate of aflatoxin polluted materials.

A vehicle positioning method based on vehicle character includes calculating one or multiple symmetric axis of vehicle at height direction, calculating one pair or multiple pair of left-right edges of vehicle, utilizing projection to calculate top-bottom edges vehicle, utilizing grey scale to calculate bottom edge of vehicle, utilizing color to calculate top edge of vehicle and utilizing various confirmed edges integrally to confirm position of vehicle in image.

To provide a device capable of determining uniquely the direction of rotation applied to an image and extracting digital watermark information correctly even in the case where a registration signal having a symmetric axis is embedded. A device for enabling digital watermark information to be extracted from image data having the digital watermark information embedded therein in such a manner that it can hardly be perceived by human eyes, in which processing for extracting rotation information and position information from the image data is performed plural times for rotation angles different from one another. For extracted position and rotation information, confidence coefficients indicating accuracy thereof are calculated. The position and rotation angle at which the digital watermark information is embedded are determined based on the confidence coefficients.

A head support mechanism includes a slider on which a head element is mounted is arranged at a tip end part of a load beam. The head support mechanism includes a support projection arranged at the tip end part of the load beam, a gimbal part including the slider and arranged to support the slider in a revolvable manner around the support projection, a displacement member arranged to revolve the slider around the support projection, and a counter balance aligned along a symmetric axis of the gimbal part so as to align a centroid of the gimbal part including the slider with the support projection.

An ultrasonic measurement method and an ultrasonic measurement apparatus are capable of performing an inspection for a short time with a high SN ratio and a small variation (that depends on an inspection direction) in sensitivity in a process for detecting a defect in all directions at 360 degrees using a matrix array sensor without performing mechanical scanning in all directions, while reducing noise that is caused by a bottom surface echo. An element selecting circuit selects a group of a plurality of ultrasonic transducer elements for transmission from among ultrasonic transducer elements that constitute a two-dimensional array sensor so that the ultrasonic transducer elements for selected for transmission are arranged in line symmetry with respect to a first line symmetric axis to set the group selected for transmission. The element selecting circuit selects a group of a plurality of ultrasonic transducer elements for reception so that the ultrasonic transducer elements selected for reception are arranged in line symmetry with respect to a second line symmetric axis that is perpendicular to the first line symmetric axis to set the group selected for reception. A transmitting element selector selects, as transmitting elements, the ultrasonic transducer elements set by the element selecting circuit. A receiving element selector selects, as receiving elements, the ultrasonic transducer elements set by the element selecting circuit.

In a first aspect, the present invention provides an omni-directional imaging assembly. In the preferred embodiment the assembly of the invention comprises a solid omni-directional lens comprising a vertical axis of symmetry; an upper surface, at least part of which is capable of reflecting rays that arrive from the inner side of the omni-directional lens; a transparent perimeter surface; a lower convex surface, at least part of which is capable of reflecting rays that arrive from the direction of the perimeter surface; and a transparent circular surface maintained in the lower convex surface around the vertical axis of symmetry. The light rays from a first 360 degrees, panoramic, scene are refracted by the transparent perimeter surface, are then reflected by the lower convex surface towards the upper surface, and then reflected by the upper surface towards the transparent circular surface, where they are refracted and exit the omni-directional lens. In a second aspect the omni-directional imaging assembly of the invention can be combined with an illumination source to simultaneously provide both omni-directional imaging and omni-directional illumination. Also described are embodiments of the invention that comprise image capturing devices, embodiments that enable simultaneous imaging of the first scene and a second scene, and embodiments that are adapted to the requirements of endoscopic imaging.

The invention relates to a laser microthruster which comprises a rotator parabolic reflecting mirror (2), an annular reflecting mirror (3), a jet pipe (10) with a slit, a shutter (8) for preventing optical mirror faces from being polluted, and an anti-pollution transparent glass loop (9), wherein the symmetry axis of the rotator parabolic reflecting mirror (2), the annular reflecting mirror (3) and the jet pipe (10) with a slit coincides with the central axis of the laser microthruster. The invention reduces the pollution of optical devices of a reflection-type laser thruster, and can effectively increase the specific impulse; the mass of the ablated working medium per impulse and the magnitude of the impulse of the thruster can be accurately controlled; and a flame-retardant film can be ablated by the laser or used for generating partial thrust.

The invention discloses a symmetry image symmetric axis detection positioning method, comprising steps of (1) extracting a rim of an image, (2) performing rim point gradient calculation, (3) calculating the midperpendicular direction between a rim point pair and a weight, (4) mapping a polar coordinate and finding an optimal symmetric axis. The invention utilizes the symmetry of the symmetry image edge point gradient direction, calculating the midperpendicular of any two rim points by aiming for the rim point set, calculating the mapping weight of the midperpendicular according to the gradient direction to form an axle wire to be chosen, utilizing a Hough transformation mapping mechanism, utilizing a standard polar coordinate formulation to descript the midperpendiculars to be chosen, accumulating the mapping weight on the corresponding polar position, and choosing the weight and the biggest polar coordinate as a preferable midperpendicular.

The invention discloses a coupling structure with a silicon nanowire waveguide and a fiber and a manufacturing method thereof. The coupling structure comprises a first silicon dioxide waveguide beingan input waveguide, a tapered silicon dioxide waveguide, a second silicon dioxide waveguide, a silicon dioxide flat-panel structure, a tapered silicon waveguide, and a silicon output waveguide. One side of the tapered silicon dioxide waveguide is connected with the first silicon dioxide waveguide and the dimension of the cross section is reduced gradually along the light transmission direction; the second silicon dioxide waveguide is connected with the other side of the tapered silicon waveguide and the dimension of the cross section of the second silicon dioxide waveguide is smaller than thatof the first silicon dioxide waveguide; the silicon dioxide flat-panel structure is connected with the second silicon dioxide waveguide; the tapered silicon waveguide coated by the second silicon dioxide waveguide is arranged at a symmetric axis of the second silicon dioxide waveguide and has the cross section with the dimension extending gradually along the light transmission direction; and thesilicon output waveguide coated by the silicon dioxide flat-panel structure is arranged at a symmetric axis of the silicon dioxide flat-panel structure and is connected with the tapered silicon waveguide. The simple coupling structure is designed to be convenient and is manufactured easily with low cost; and large-scale production and application of the coupling structure can be realized easily.

The invention provides a method for automatically segmenting consistent damage areas for buddha figure Thangkas. The method includes the steps of conducting vertical projection for a head light area of a Thangka image, obtaining an image symmetric axis by using a one-dimensional function symmetry detection method, obtaining an initial segmentation result by employing a partitioning segmentation method based on the symmetric axis, obtaining the image covered by the damage areas, extracting texture characteristics by using Gabor transformation, constructing a multi-scale and multi-characteristic set in combination with Lab space color characteristics, employing KNN classification to obtain a secondary segmentation result, further refining the damage areas by using morphological operation, and removing small damage areas to finally obtain a template of consistent damage areas. Through the method, various large-scale linear and block falling areas in the buddha figure Thangkas can be automatically segmented, the segmentation speed is fast, the efficiency and accuracy are high, and rapid automatic segmentation of the damage areas of buddha figure Thangkas can be realized.

A current sensor includes a folded-shaped current path including a pair of arm portions extending in parallel with each other, and a pair of magnetoelectric conversion elements provided so as to sandwich therebetween a symmetric axis passing between the pair of arm portions, the pair of magnetoelectric conversion elements being used for detecting magnetism caused by a current passing through the pair of arm portions, wherein a half-bridge circuit in which the pair of magnetoelectric conversion elements is series-connected and a signal is able to be extracted from a connection point between the pair of magnetoelectric conversion elements is formed, and sensitivity axes of the pair of magnetoelectric conversion elements are oriented in a same direction and sensitivity-influencing axes of the pair of magnetoelectric conversion elements are oriented in a same direction.

The invention discloses a formwork system of shear walls at two sides of an extensible seam. The formwork system of the shear walls at the two sides of the extensible seam comprises two sets of wall body pouring formworks arranged symmetrically with the extensible seam as a symmetric axis, side face fastening steel tubes and end portion fastening steel tubes, wherein, the side face fastening steel tubes and the end portion fastening steel tubes are used for fixing the wall body pouring formworks. Each set of the wall body pouring formwork is respectively enclosed by an outer side formwork, an inner side formwork and an end portion formwork. A support block is respectively arranged between the outer side formwork and the inner side formwork in each set of the wall body pouring formwork and each outer side formwork and each inner side formwork are fastened through each transverse fastening steel tube, each side face fastening steel tube and a split bolt. Each end portion formwork is pressed on each outer side formwork and each inner side formwork through the end portion fastening steel tubes, bolt rods and match of end portion movable nuts on the bolt rods. According to the formwork system of the shear walls at the two sides of the extensible seam, the formworks at the two sides of the extensible seam can be erected by once in a narrow space, construction period is greatly shortened, engineering cost is reduced, and the formwork system is not limited by the size of the extensible seam and particularly applicable to the condition that the extensible seam is small.

A light guide late consists of two light incoming surfaces being two opposite surface of light guide plate, one light outgoing surface being adjacent to two light incoming surfaces on top surface of light guide plate and a reflection surface opposite to light outgoing surface and with several microstructure. It features that center between two said light incoming surfaces is used as symmetric axis to arrange said microstructure and their size and density is decreased gradually and symmetrically along direction from center to two light incoming surfaces. A back light module prepared by said light guide plate is also disclosed.

The invention discloses an adjustable dual-twisting mirror box for measuring an apparent parameter of a yarn and a device of the box. The adjustable dual-twisting mirror box is in a hollow semi-cylinder closed structure and comprises a diffuse reflection arc shield plate and semicircular fixed plates, wherein the diffuse reflection arc shield plate forms an arc surface of a semi-cylinder, the two fixed plates respectively form two end faces of the semi-cylinder, through holes are formed in symmetric shafts of the fixed plates, a connecting line of the two through holes forms a symmetric axis of a yarn channel fixing plate to form a symmetric plane, twisting mirrors and an LED (Light Emitting Diode) light source are arranged at two sides of the symmetric plane by adopting a mirror symmetry structure, a lens is arranged on the symmetric plane, a monocular CCD (Charge Coupled Device) camera is arranged behind the lens and connected with the lens, the twisting mirrors are arranged at one side close to the diffuse reflection arc shield plate, the LED light source is arranged at one side far away from the diffuse reflection arc shield plate, the twisting mirrors, the LED light source and the lens are arranged on the same plane, and a yarn channel penetrates through a space formed by the twisting mirrors and the LED light source, and thus the comprehensive analysis for the three-dimensional apparent characteristic of the yarn can be realized by one monocular CCD camera.

The invention discloses a vehicle-mounted movable detecting system for computed tomography (CT), and belongs to the technical field of nondestructive detection. The detecting system comprises a detecting car, an operating car, a power car, a CT annular scanning device, a workpiece bracket, safeguards and the like, wherein the CT annular scanning device provided with a shock absorber is mounted on the detecting car; a ray source and a detector are mounted on both sides of the central symmetry axis of a precise circle respectively, and are driven by the motor to realize the synchronous rotation, so as to conduct CT scanning on a workpiece. The detecting system has the advantages that the workpiece detected does not need to rotate, and CT scanning imaging of the workpiece is realized by the synchronous rotation of the ray source and the detector around the workpiece; the workpiece bracket is mounted on the detecting car, and is used for clamping and moving an detecting object; meanwhile, the detecting system further has the characteristics of being movable, easy to adjust, capable of implementing detection of remotely external fields and the like.