113 results about "Centrosymmetry" patented technology

The invention provides a terahertz plane adsorbing material, belonging to the technical field of electromagnetic function materials and relating to an electromagnetic-wave absorbing material. The terahertz plane adsorbing material comprises a substrate, a metal reflecting layer, a dielectric layer and an artificial electromagnetic medium layer; wherein, the metal reflecting layer is a continuous metal film and is arranged on the surface of the substrate; the dielectric layer is arranged between the metal reflecting layer and the artificial electromagnetic medium layer; the artificial electromagnetic medium layer is composed of artificial electromagnetic medium units which are arrayed periodically, each unit is a centro-symmetric figure formed by metal film lines with line width which is t and comprises two sing-opening metal rings which are connected backwards with long edges at two sides of an electric snap ring resonator. The terahertz plane adsorbing material provided by the invention has two strong-absorption frequency ranges, so as to provide selective adsorption and detection at different frequency ranges, and the terahertz radiation with wider spectral range can be adsorbed, so as to improve the performance and efficiency of the terahertz plane adsorbing material.

The invention provides a technical method for constructing a reference surface of an assembled folio cartridge receiver and a special clamp. The special clamp comprises a base, pressing plates, adjustable supports, support screws and two sets of positioning components, wherein each positioning component comprises a front-end positioning block, a front-end hook-shaped pressing plate, a connection block, a rear-end positioning block and a rear-end hook-shaped pressing plate; and the two sets of positioning components are in centrosymmetry about a central axis of the base. The technical process comprises the following steps of: performing rough turning machining on an annular blank of the folio cartridge receiver, retaining flange edges, splitting the annular piece of the cartridge receiver,cutting off the flange edges on different sides, fixing two half cartridge receivers on the special clamp, and constructing the reference surface of the assembled folio cartridge receiver by adjusting the clamp. Compared with the conventional method, the technical method has the advantages that: the technical requirement of the whole machining flow is easy to realize; the whole machining flow canbe finished on the vertical lathe; the machining efficiency is high; and the reference surface of the folio cartridge receiver is machined during one-time clamping.

The invention discloses a frequency detection principle-based two-axis resonant silicon micro-accelerometer, which consists of an upper layer and a lower layer. The upper layer is an accelerometer mechanical structure manufactured on a monocrystalline silicon slice; the lower layer is a signal lead manufactured on a glass substrate; the accelerometer mechanical structure consists of a mass block, an outer frame, two pairs of identical resonators and eight identical first-stage lever amplification mechanisms; the mass block is positioned in the middle of the structure; one pair of resonators is symmetrically arranged on the upper and lower sides of the mass block and is used for measuring acceleration input along a y axis; the other pair of resonators is symmetrically arranged on the left and right sides of the mass block and is used for measuring acceleration input along an x axis; and the whole structure is centrosymmetric. The micro-accelerometer is not required to be supported by a supporting beam, so that the structure is simplified; and the micro-accelerometer has a stable structure, and inertia force converted from the acceleration is effectively transferred to the resonators simultaneously.

The invention discloses a dual-axle capacitor micro mechanical accelerometer, which comprises a basic plate, a weigh block, a flexible support, a driving electrode, a detecting electrode, a tooth axle and a backstop, while it uses the weight block to sense the accelerators at two orthogonal directions. Wherein, the weight block is at the center of said device, while the flexible support, backstop, driving electrode, and detecting electrode are outside the weight block; the flexible support can realize decouple in two orthogonal directions to improve the sensitivity and resolution in said two directions; the flexible support uses the four corners of square as anchor points, with better structure stability; and it uses comb capacitor to realize differential static driving and capacitor detection, to improve the sensitivity and resolution of accelerator. The invention can easily realize two-dimension accelerator detection with high accuracy.

The invention discloses a terahertz wave detector and a manufacturing method of the terahertz wave detector. The terahertz wave detector is used for detecting radiation in the terahertz wave band and comprises a top layer composite sensitive thin film layer and a cross-shaped metamaterial metal hollow absorbing layer located below the top layer composite sensitive thin film layer. A cross-shaped hollow graph is centrally symmetric, and the cross-shaped metamaterial metal hollow absorbing layer generates intense resonance absorption in the specific terahertz wave band and has an obvious absorption peak. Due to the characteristics of the centrally symmetric cross-shaped hollow graph, the cross-shaped metamaterial metal hollow absorbing layer is insensitive to the polarization and polarization direction of the incident terahertz waves, the direction of incident light is not required specially, the frequency range of resonance absorption through the metamaterial structure can be adjusted by changing the size of the cross-shaped graph, and maximum absorption in a certain specific wave band can be achieved. According to the terahertz wave detector, high absorption in the specific wave band can be achieved, the absorption frequency band is easy to adjust, detection sensitivity is high, and the terahertz wave detector is compatible with an MEMS technology, can be produced in an array mode and has wide application prospects.

The invention provides a silicon carbide ceramic heat-exchanging board. The heat-exchanging board is of a centrosymmetry structure in design shape, and the centrosymmetry structure can be quadrate or round; the heat-exchanging board is provided with a heat-exchanging channel of a dual loop structure; and the silicon carbide content of silicon carbide ceramic is not lower than 95wt% in terms of the total weight of the silicon carbide ceramic. The invention further provides a preparation method and application of the heat-exchanging board. The silicon carbide ceramic heat-exchanging board disclosed by the invention can be used for greatly increasing the heat-exchanging efficiency and prolonging the service of a heat exchanger.

The invention relates to a method correctly obtaining the corresponding relationship of the pixel geometric position between the projection image of a projector and the frame buffering image of a computer. The method includes the steps that: (1) a characteristic pattern of the projection image is determined, the circumference of the characteristic pattern is provided with a rectangle, and the center of the characteristic pattern is provided with a central symmetrical pattern that is uniformly arranged corresponding to a characteristic point; the parameter of the pattern is calculated; the characteristic pattern is projected on a displaying wall by a projector in an opposite color; the image of the characteristic pattern that is displayed on the displaying wall is shot with a digital camera; the shot image is segmented; every corner point of the rectangle surrounding the characteristic pattern is identified in the segmented image; every internal central symmetrical pattern is identified in the segmented image, and the center of the internal central symmetrical pattern of the characteristic pattern is calculated with the traditional statistical method; the two characteristic points are formed into a data matrix; the calculus of interpolation is carried out for the data matrix, thereby the matrix data after the interpolation establishes a corresponding geometric relationship with the original characteristic pattern on the pixel position.

The invention provides a cooperation logo and a recognition method of identities and poses of a plurality of intelligent individuals. The cooperation logo comprises a background area, a positioning pattern, an orienting starting point pattern, an orienting ending point pattern and a coding pattern, wherein the positioning pattern, the orienting starting point pattern, the orienting ending point pattern and the coding pattern are distributed at the background area and are all the same centrically-symmetric pattern. According to the cooperation logo and the recognition method of the identities and poses of the plurality of intelligent individuals, the cooperation logo is of two colors, namely, the background color and the pattern color; therefore, few colors are involved, the mutual interference of similar colors is prevented, the recognition algorithm of the cooperation logo is simplified, the time consumption in pattern processing is reduced, the cognition speed and precision are improved, and the real-time recognition performance of a controller to the identity and pose of each intelligent individual is improved.

It becomes difficult to perform the optimum equalization signal processing in coherent receiving systems if a channel response in an optical fiber transmission line includes a factor without temporal centrosymmetry, therefore, an equalization signal processor according to an exemplary aspect of the invention includes an equalization filter means configured to receive digital signals by coherent receiving systems; a coefficient control means configured to control coefficients defining characteristics of the equalization filter means; a significant coefficient holding means configured to hold significant coefficients of significant values among initial values of the coefficients; a significant coefficient positioning means configured to determine a significant coefficient position, a position of the significant coefficients in the initial values, so that equalization characteristics of the equalization filter means may be optimized; and a significant coefficient setting means configured to allocate the significant coefficients to the significant coefficient position.

The invention discloses a sunk well structure, comprising a well body which is round in the outer profile of the section and provided with a central hole in the center, a well wall is formed on the well body on the periphery of the central hole and provided with a plurality of round holes parallel to the central hole, and the round holes are symmetrically distributed with the axis of the well body as a center. The sunk well structure of the invention has the advantages of simple structure, fewer hole number and reasonable stress, and the section of the sunk well is in a centrosymmetry structure and the well holes comprises big holes and small hole, therefore, construction operation and positioning control are convenient when sinking.

The invention provides an array substrate and a liquid crystal display panel. The array substrate comprises multiple pixel units in array arrangement. Each pixel unit comprises a substrate, a thin film transistor, a color resistance layer and a pixel electrode, the shape of each pixel electrode is in central symmetry, each pixel electrode comprises a connection protruding block contacting with a drain electrode to realize connection and a symmetric protruding block in central symmetry with the connection protruding block, and a first color resistance opening and a second color resistance opening corresponding to the connection protruding block and the symmetric protruding block respectively are formed in the color resistance layer. Therefore, poor matching of existing COA-type array substrates caused by the fact that color resistance opening and pixel electrode design is asymmetric can be improved, and quality of the liquid crystal display panel can be improved effectively.

A double frequency conversion efficiency testing arrangement of centrosymmetry material micro-nanometer structural elements is disclosed that comprises laser, collimated beam expanding system, Polaroid, incident light fence, focusing microscope, object supporter, turntable of horizontal angle, multi-dimension holder, double frequency filter disc, casing of barrier, laser powermeter and big bottom desk, the laser emitted by laser device goes through the collimated beam expanding system, Polaroid and incident light fence, and observed with focusing microscope, and adjusted with the turntable of horizontal angle and the multi-dimension holder, then emitted into the measured example, the double frequency light that its frequency is doubled in the measured example is received and measured by the laser powermeter to display the light intensity value of the double frequency light, the light intensity value is compared with the light intensity value that the measured example and the filter disc are not placed, the double frequency conversion efficiency can be gained. The position of the measured example is adjusted quickly by multi-dimension holder and turntable of horizontal angle, the adjustment is convenient, measurement accuracy is high and easy to use and spread.

The invention discloses a lock washer and the lock fastener component, wherein, the lock washer comprises a main body of the washer and a through hole arranged at the middle of the main body, wherein, a plurality of notches communicated with the through hole are distributed on the main body of the washer along radial direction by means of centrosymmetry; the edge of the main body of the washer at one side end of the communication part of each notch and the through hole is folded towards the surface end to form a raised locking part; the edge of the main body of the washer on the other side end is folded towards the internal end to form a raised locking part. The lock fastener component comprises a threaded fastener and the lock washer matched with the threaded fastener. The invention has the advantages of looseness prevention under high temperature and high-frequency vibration impact, better backward-resistant and locking effect, simpler processing technology, lower production cost, and repeated disassembly and application.

The invention relates to the technical field of pipe fitting clamps, in particular to an electric-driving double-acting full-stroke chuck. The electric-driving double-acting full-stroke chuck comprises a chuck body, at least one pair of clamping jaws and clamping jaw driving mechanisms, and the clamping jaw driving mechanisms are used for controlling all the pairs of clamping jaws to move in the same direction or oppositely and mounted in the chuck body. Each pair of clamping jaws corresponds to one corresponding group of clamping jaw driving mechanism. When the clamping jaws are arranged in two or more pairs, the motion of all the groups of clamping jaw driving mechanisms is relatively independent and does not interfere with one another. Two pairs of clamping jaws can be adopted in the electric-driving double-acting full-stroke chuck, and the four clamping jaws achieve a pairwise self-centering function; the motion of the two pairs of clamping jaws is staggered and does not interfere with each other, that is, the motion of the clamping jaws is asynchronous. The electric-driving double-acting full-stroke chuck is especially suitable for clamping workpieces in a non-centrosymmetry shape, such as workpieces with rectangular, triangular and oval sections and the like. If the electric-driving double-acting full-stroke chuck needs to be moved, only the number of motors and corresponding gears needs to be increased.

The invention discloses a support pillar of an LED (light emitting diode) backlight module, wherein the support pillar is arranged between a backplane and an optical diaphragm of the LED backlight module; the bottom of the support pillar is fixed on the backplane; a plurality of LED light sources are arranged on the backplane and are distributed like a centre symmetry figure; the support pillar is arranged in the centre of the centre symmetry figure; the support pillar is of a prism structure or prismatic table structure; and the LED light sources are respectively arranged on mid-perpendiculars of bottom borders of the sides of the support pillar. Due to the fact that the LED light sources of the LED backlight module are distributed like the centre symmetry figure, the support pillar is made of a transparent material and arranged in the centre of the centre symmetry figure, and the support pillar is of the prism structure or prismatic table structure, a shadow formed in the LED backlight module by the support pillar is eliminated with lower cost.

The invention discloses a wiring structure of a touch screen. The wiring structure of the touch screen comprises a guard plate, an upper ITO (Indium Tin Oxide) layer, a glass plate and a lower ITO layer, wherein the upper ITO layer and the lower ITO layer are distributed at the same side or two sides of the glass plate; each ITO layer is respectively provided with a plurality of touch electrodes; the upper ITO layer is provided with multiple Y touch electrodes; the lower ITO layer is provided with multiple X touch electrodes; the X touch electrodes and the Y touch electrodes are of a hollow rectangular frame shape; and the overlapped parts of the X touch electrodes and the Y touch electrodes are provided with a plurality of suspended blocks in a centrosymmetry mode. By virtue of the mode, the wiring structure disclosed by the invention can be used for realizing the wiring structure requirements of a large-size touch screen by using less touch electrodes, and is higher in linearity.

The invention provides an alignment mark for an exposure device. Simultaneously, the alignment mark is technically characterized in that a, the whole body of the alignment mark is connected, namely any line in the alignment mark has a crossed line; b, the alignment mark is a central symmetric figure; c, a peripheral outline (the crossed part of a mark periphery and a background) of the alignment mark is communicated (namely, any place along the outline is used as a starting point and the alignment mark always returns to the starting point no matter whether the alignment mark walks in a clockwise direction or an anticlockwise direction along the outline); d, the minimum line width and the gap size for forming the alignment mark are greater than the limiting resolution of a measurement lens of the alignment mark; e, no less than four horizontal or vertical lines for forming the alignment mark are arranged in each direction. The alignment mark disclosed by the invention has obvious outline characteristics and is the central symmetric figure, so that the resolution is improved; meanwhile, the lengths of the horizontal line and the vertical lines of the alignment mark are the same and the alignment precision is improved.

The invention relates to a method for determining lifting force and resistance moment of a spiral wing. According to the method, firstly, a laser three-dimensional imaging method based on a cooperative target is utilized for scanning to obtain three-dimensional point cloud of the spiral wing, and then, the feature of centrosymmetry of the spiral wing is utilized for analyzing one blade. Firstly, the blade is divided into n equal parts, next, the geometric feature of each part is extracted, in addition, the lifting force coefficient and the resistance coefficient are calculated, then, the lifting force coefficients of each part are superimposed, the resistance coefficients are superimposed, and the lifting force coefficient and the resistance coefficient of the spiral wing are obtained. Finally, the lifting force coefficient and the resistance coefficient are substituted into a spiral wing lifting force and angular velocity relational expression deduced according to an air resistance model and a received resistance moment and angular velocity relational expression of the spiral wing, and the lifting force and resistance moment of a spiral wing can be determined. The method has the advantages that the spiral wings in any shapes can be scanned, in addition, the lifting force and angular velocity relationship and the resistance moment and angular velocity relationship of the spiral wing is given, and wide applicability is realized.

The invention relates to a selenium-silicon-silver-barium compound, a selenium-silicon-silver-barium middle and far infrared non-linear optical crystal as well as a preparation method and application thereof. A chemical formula of the compound is BaAg2SiSe4, molecular weight of the compound is 697.01, the crystal is a tetragonal crystal system, a space group is of a non-centrosymmetry type (described in the specification), cell parameters comprise that a=b=7.066(3) angstrom, c=8.233(7) angstrom, alpha=beta=gamma=90 degrees and Z=2, and unit cell volume V=411.1(5) angstrom<3>. The preparation method comprises the step of carrying out solid-phase reaction on simple substances barium, silver, silicon and selenium under vacuum condition. Powder XRD spectra of the selenium-silicon-silver-barium compound and the selenium-silicon-silver-barium middle and far infrared non-linear optical crystal are consistent with theoretical values; and under irradiation of lasers with the wavelength of 2090nm, and frequency doubling effect of BaAg2SiSe4 with the granularity of 55-88 Mum is two times that of AgGaS2 with the same granularity.

The method for obtaining optical projection parameter of camera includes the following steps: utilizing the characteristics of scrambed image which has centrosymmetry, using a correcting article withseveral symmetrical and concentric geometrical figures to define the optical axis of camera lens, and further find out its projection centre point on the optical axis by using error testing method, at the same time solving its equivalent focusing and projection mode. Said invention is simple, can accurately define internal and external parameters of camera, so that it has extensive application range.

The invention relates to a radial vibration piezoelectric transformer and a preparation method thereof. The primary and the secondary of the piezoelectric transformer are formed by overlapping circular or regularly polygonal ceramic chips in series or in parallel; the surface electrodes of the piezoelectric transformer are in non-centrosymmetry; the side electrodes formed by coating silver from the convex part of each surface electrode to the edges of the chips along the side surface and coating the silver to the edges of the other surface are also in non-centrosymmetry; each chip is polarizedalong the overlapping direction; a spacer or no spacer exists between the primary and the secondary; and the side electrodes are coated with an insulating material. The piezoelectric transformer hasgood characteristics of constant current output, constant power output, input voltage and input current having the same phase or a phase difference pi and the like, improves the efficiency of the piezoelectric transformer to the maximum, reduces the loss of the piezoelectric transformer, and improves the reliability of the piezoelectric transformer by rationally matching the relationship between the structural parameters of the primary and the secondary and the load.