689 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 an apparatus and a method for determining high temperature wettability. The apparatus comprises a heater body, a heating portion, an extruding dripping portion, a sample supporting portion and an image acquisition and processing portion. The heater body is comprised of a stainless steel cavity, a furnace lid and a No. 3 fluorine rubber ring bolt connecting together. A shielding layer in the heating portion is arranged in the center of a furnace bottom in the heater body, and a heating member is placed at the center of the shielding layer. The extruding dripping portionis perpendicularly arranged on an upper end of the heater body, and a lower end of a thermocouple in the heating portion, a lower end of the extruding dripping portion and an upper end of a sample bench are placed in the heater body. A substrate is placed at top of the sample bench. Two sets of CCD digital cameras or CMOS high speed cameras in the image acquisition and processing portion and a light source are respectively placed at the front and rear and the left and right of the heater body, and are in a same horizontal line with a symmetric axis of a quartz glass observation window, a wallthrough hole on the shielding layer and a heating member through hole on the heating member. The invention also provides a method for determining high temperature wettability.

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.

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.

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.

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 liquid crystal display device of this invention includes a first substrate, a second substrate opposing the first substrate, and a liquid crystal layer sandwiched between the first and the second substrates, wherein the liquid crystal layer includes a polymer region and a liquid crystal domain surrounded by the polymer region in which liquid crystal molecules are oriented in an axial symmetrical manner, the first substrate includes a dry film having a concave portion on a surface facing the liquid crystal layer, and a symmetric axis in the liquid crystal domain substantially extends through the concave portion and is substantially perpendicular to the first substrate.

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.

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.