59 results about "Star pattern" patented technology

A method and apparatus for a securement device useful for the treatment of aneurysms includes a hub and, in one aspect, a plurality of arms or spikes in a star pattern extendable therefrom and into engagement with a blood vessel wall. The securement device may be deployed to anchor a secondary device, such as an exclusion device for example a stent graft, in position in a flow lumen and thereby prevent the migration of the exclusion device in the flow lumen. The arms may be positioned to penetrate through the exclusion device and thence into the flow lumen wall to provide such securement.

The invention discloses an outfield precision testing method for a high-precision star sensor. Accuracy in calculation of a star pattern posture of the star sensor and frequency domain stripping of short-period error terms of the posture are realized by utilizing a procession correction formula, an earth rotation model, an atmosphere correction model and a power spectral density formula, and the posture measuring error of the star sensor can be rapidly and effectively analyzed and evaluated. According to the method, the hardware resource is not occupied, the method is realized by utilizing software and does not need the ground intervention. According to the method, by combining the posture identification principle of the star sensor and adopting a data smoothing method, the posture truth value of each frame star pattern moment is calculated, so that a foundation is established for the subsequent analysis on the posture measuring error; by adopting the method for combining the time domain and the frequency domain, the short-period error term is decomposed into an airspace low-frequency error, a high-frequency error and a time-domain error by virtue of the power spectral density analysis, so that reasonable data support is provided for further evaluation of the precision indexes of the star sensor, and the index performance of the star sensor can be improved.

The invention provides a star pattern recognition method based on a directed loop. In the method, a brightest star in a field of view is selected as a reference star, the reference star and neighboring stars are connected to form a radial star pattern, a candidate reference star matching group is obtained through a matching probability method, then, the neighboring stars are used for forming a directed loop model, and based on the principle of integral matching and a longest matching chain, an optimal matching group is selected as a final recognition result. In comparison with the prior art, the method has the advantages of high success rate of star pattern recognition, high recognition speed, and so on. The star pattern recognition method provided by the invention can guarantee that the star pattern recognition success rate reaches 99% and the recognition speed reaches 5-10 HZ when the position error of stellar image points is superior to a 0.1 pixel.

A construction method follows the steps as: select proper driving head, spiral auger and star-pattern drilling bit according to the depth of the stone layer and pile length; drilling at low speed to designed position; Upon reaching the stone layer, move out the drill; fill clay back to the hole till above the stone layer; install a clay pressing device to the helical lobe on the spiral auger; drill in again till designed position; move out the drill and put in reinforce cage and concrete.

The invention relates to a total station instrument and a star pattern recognizing method thereof. The star pattern recognizing method comprises: continuously photographing a star through the total station instrument to obtain the motion track of the star on an image surface, and fitting a track through a polynomial; extrapolating the image point coordinate of the star at the set time according tothe fitted track model, and obtaining the observed horizontal angle and height angle of at least three stars the total station instrument image coordinate and the dial coordinate conversion model; calculating the angular distance information between any two stars, and setting a reasonable threshold value by using the angular distance information as a matching condition to complete the matching and recognize the star in the star pattern. According to the total station instrument and the star pattern recognizing method thereof, the star pattern recognition of the total station instrument without the rough position of the station can be realized, so that the star pattern recognition can be performed by an astronomical survey operator without the professional knowledge of star pattern recognition.

The present invention relates to the field of new light sources, in particular to a starry sky projection lamp. The present invention adopts the following technical scheme: a starry sky projector lamp, comprising a base and a lampshade, an upward facing LED lamp is arranged on the base, and a lampshade is arranged on the base, The light of the LED lamp is irradiated through the lampshade and projected on the plane. The pattern of the starry sky is set on the lampshade so that the light projected on the plane forms a pattern of the starry sky. At the same time, a lamp holder is set under the LED lamp. A motor is set under the base, and the lamp base is connected to the motor drive. The rotation of the motor can drive the lamp base to rotate, thereby making the LED light rotate and the pattern projected on the plane to rotate. A wireless control module is installed inside the base, which can be connected to a mobile phone. The projector lamp is controlled. The invention has the advantages of simple structure, low cost, wireless control, and is suitable for most families.

The invention relates to one MQAM hard judgment method in hard judgment in the multiple level cross range modulation communication system, which comprises the following steps: storing each signal point relative hard judgment two bit in star pattern on sequence number into one data set; receive end processes the demodulated character information to get data set index value according to this invention method and steps and then gets the character hard judgment results according to the index value.

The invention discloses a star pattern identification method of a hybrid redundancy feature. The star pattern identification method comprises the following steps of: based on the geometric position relation of the navigation star points, establishing a hybrid redundancy pattern feature of a navigation reference star point, and then, creating a binary feature database of the navigation reference star point; based on the geometric position relation of a star map and the star points, calculating the hybrid feature of the star map reference star point; according to the hybrid feature of the star map reference star point, selecting candidate star points corresponding to the star map reference star point from the binary feature database by using similar score measurement; by a maximum matching pair algorithm, selecting a matched star point for the star map reference star point from all the candidate star points. The invention also discloses a star pattern identification device of the hybrid redundancy feature. With the method and the device, high accurate identification rate can be realized under the condition of high star point position noise and star magnitude noise, moreover, acquisition of the matched star point is guaranteed when few accompanying star points exist in the radius of the navigation star point pattern.

The invention discloses a diamond with double five-pointed-star patterns seen from a facet and a processing method; the diamond comprises a crown part, a waist part and a bottom part, wherein the bottom part comprises ten large prismatic sharp faces, ten bottom foot faces and five small prismatic pointed faces which are uniformly arranged by taking the sharp points as the centers, and the crossededges of the five small prismatic sharp faces and the ten large prismatic sharp faces are connected end to end to form a first five-pointed-star pattern; a small bottom foot face is arranged relativeto each angle A of the first five-pointed-star pattern patter, and a second five-pointed-star pattern which is smaller than the first five-pointed-star pattern is formed by the five bottom foot faceson the facet in a reflection mode; and an included angle between the connecting line of the angle A of the first five-pointed-star pattern and the sharp points and the connecting line of the angle B of the second five-pointed-star pattern and the sharp points is 36 degrees. When observed under a light cutting mirror, a large five-pointed-star pattern and a large five-pointed-star pattern are represented on the facet of the diamond, the color of the second five-pointed-star pattern is darker than that of the first five-pointed-star pattern, and the included angle between the two patterns is 36degrees.

A sectional planter is provided with an interior volume defining a planter portion with a flange and a tongue and groove for positively connecting the sectional planter to at least one additional sectional planter, where the tongue and groove connection allows for easy removal of the sectional planter from the base of a tree or post after assembly. The sectional planter can hold a variety of plants, shrubs, bushes or other floral or decorative items. The sectional planter may be combined with one or more additional sectional planters to form a geometric shaped planter. The geometric shapes formed with two or more interconnected sectional planters may be a circle, an oval, a square, a star pattern, a rectangle, a triangle, a trapezoid, or a parallelogram. In at least one embodiment two or more sectional planters are combined to form to encircle a tree.

The present invention relates to a star pattern recognition method and to a star sensor apparatus for determining spacecraft attitude, and more particularly, to a star pattern recognition method and to a star sensor apparatus using statistical data. According to the present invention, a star pattern recognition method for determining spacecraft attitude is provided, as well as a star sensor apparatus for the method, wherein said method comprises: an observation data acquiring step of acquiring statistical data for a first reference star in images of stars obtained from a star sensor of a spacecraft; and a pattern recognition step of searching the registered plurality of reference stars for one reference star having statistical data closest to the statistical data of the first reference star. The statistical data for the relevant star are statistical indices determined by coordinates on a standard coordinate system of stars in a region-of-interest containing said relevant star.

A method and a system of control of power consumption of communications between electrical modules of an electrical infrastructure, including a star-shaped communication network between a central module, or master module, and a set of slave modules, the master module being set up to be connected to the slave modules by non-wireline communications links in a star pattern, and a processing circuit set up to regulate the power levels of communications links at least in a direction of reception by the master module from at least one slave module or by at least one slave module from the master module.

A pattern for heat transfer material for a thermal transfer interface having a high aspect ratio. Two thermal interface elements (e.g., a die and a cover) meet to form a thermal interface with a high aspect ratio (i.e., the ratio of length to width is above a threshold such as 9:5). The pattern includes two star-shaped patterns aligned side-by-side in the lengthwise (longer dimension) direction. Each star pattern includes spokes emanating from a local central point. The pattern optionally includes a central cross shape that includes a vertical line extending between the two longer edges and a horizontal thickened section in which horizontally aligned spokes are thickened. When pressed between two thermal interface elements, this pattern performs better (e.g., covers more area) than a more traditional pattern, thereby improving heat transfer ability.

The invention provides a hydraulic cavitation sterilization device with a fractal pore plate and relates to a sterilization device. The invention aims to solve the technical problem that an existing cavitation sterilization effect of the pore plate is poor. The hydraulic cavitation sterilization device with the fractal pore plate comprises two flange plates, a cylindrical tube and the fractal pore plate, wherein the fractal pore plate and the cylindrical tube are fixed between the two flange plates; the fractal pore plate is arranged at a water inlet end of the cylindrical tube; the fractal pore plate is formed by arranging a polygon hole at the center of circle of a round plate, and the area of the polygon hole is 0.9-1.1% of the total area of the round plate; the polygon is a symmetric hexagram, a multi-star pattern, a three diamond or a multi-diamond pattern. The sterilization efficiency of the sterilization device of the fractal pore plate is higher than that of a conventional triangle pore plate by 20%-30%. The sterilization device can be used for the field of sewage treatment.

A star pattern recognition method based on a radial triangle mapping matrix comprises the following steps of: extracting a radial triangle mode of a navigation star, and establishing a navigation star mode library; constructing a radial triangle formed by a main star as a vertex and any two adjacent stars in a mode radius according to the geometric distribution of observation stars extracted from a star pattern; mapping the angular distance of the radial triangle to a mode matrix; completing voting through matching of the grids of the mode matrix; selecting high-vote candidate stars as main star labels through voting; for individual low-vote and equal-vote candidate stars, determining a rotation matrix and an attitude angle by using double-loss attitude determination; and verifying the radial triangle through a reprojection method, and outputting an observation star verification identification result to obtain a star label. Other Nmax to-be-recognized stars close to the main point of the star pattern are recognized in the same way. According to the method, the robustness of a triangle algorithm is inherited, meanwhile, a pattern matrix with rotation invariance is constructed, the whole pattern library is searched during each radial triangular pattern matching voting, and completeness is achieved.

A tilt sensor apparatus (36) includes one or more tilt sensors (42). Each tilt sensor (42) includes a conductive element (64) entrapped within an opening (46) formed through a middle planar substrate (38). The opening is surrounded by an opening wall (52) which is entirely covered by a conductor (54). A conductive star pattern (100′) is formed on a top planar substrate (40), and a conductive star pattern (100″) is formed on a bottom planar substrate (44). The star patterns (100) are positioned at opposing ends of the opening (46). The conductive element moves within the opening (46) as the apparatus (36) is tilted. An interrupt-driven control circuit (124) is configured to indicate a change in orientation only when a short is first detected across a contact pair (54/56, 54/60) that corresponds to an orientation opposite to a currently-indicated orientation.

The present invention provides a laser spot light with twinkling function including a laser head, a body case defining an opening, a heat radiator supporting the laser head and fixed within the body case, a light baffle configured between the opening and the laser head, a first grating has a star pattern configured between the light baffle and the laser head, a second grating has a pattern of figures configured between the first grating and the laser head, a motor, a gearbox driven by the motor and configured to drive the light baffle to rotate or translate. The light baffle defines a plurality of through holes. The laser spot light of the invention utilize a motor driving a light baffle to rotate or translate, such that the static light spots generated by the first grating are blocked and unblocked alternately, resulting a lot of twinkling light spots.

The invention provides a diamond structure with interior cross-star pattern, which has 93 facets on a crown and a pavilion and which comprises a table, the crown, the pavilion and a girdle that connects the crown and the pavilion, wherein crown main facets account for 57, pavilion main facets account for 36, the top of the crown has one table facet, the lateral side of the crown has 8 crown kite-like main facets, 8 crown trapezoidal main facets, 8 crown shield-like main facets, 16 crown square main facets and 16 crown upper-girdle triangular main facets, the pavilion is of symmetric structurehaving 4 pavilion square main facets sharing an apex and 32 pavilion lower-girdle main facets; auxiliary small facts of the girdle are square; a cross-star pattern can be observed from the crown.