58 results about "Beta angle" patented technology

A method for designing a fixed cutter drill bit, includes simulating the fixed cutter drill bit drilling in an earth formation, determining radial and circumferential components of imbalance forces on the drill bit and a Beta angle between the radial and circumferential components of the imbalance forces during a period of simulated drilling, and adjusting a value of at least one design parameter for the fixed cutter drill bit at least based upon the Beta angle. To facilitate drill bit design, the Beta angel can be displayed to a drill bit designer. To improve performance, the method can include repeating the simulating, determining, and adjusting to change a simulated performance of the fixed cutter drill bit. A drill bit may be made according to the design resulting from the method.

Provided is a grain-oriented electrical steel sheet having a linear groove forming an angle of 45° or less with the direction perpendicular to the direction of rolling, wherein a grain-oriented electrical steel sheet having low iron loss characteristics, on which a magnetic domain subdivision treatment by chemical means is used, is provided by setting the incidence of microparticles having a length of 1 mm or less in the rolling direction in a bottom part of the groove to 10% or less (also including cases in which microparticles are not present), providing a forsterite coating in which the Mg weight per side of the steel sheet is at least 0.6 g/m2 in the groove, and setting the angle (beta angle) between a rolling surface and the <100> axis of a secondary recrystallized grain oriented in the rolling direction of the steel sheet to an average value of 3° or less.

The present invention provides a steric direction finder with simple structure. Said steric direction finder can be used for accurately feeding the operative instrument into targe point when the operation on human or animal cranium and brain can be made. Said invention includes the following several portions: base plate which is made up by using high-strength rare earth engineering plastics or other material and does not produce pseudoimage interference when the image scanning process is made, fixed nut with guide hole, bow-shaped alpha angle measurer with angular scale, bow-shaped beta angle measurer with angular scale and fastener for regulating tightness.

A grain-oriented magnetic steel sheet having linear grooves for magnetic domain refinement which have been formed in a surface of the steel sheet is produced in accordance with the present invention so that the proportion of linear grooves under which crystal grains having a deviation in orientation from the Goss orientation of 10 degrees or more and having a grain diameter of 5 [mu]m or more are present is regulated to 20% or less, and that the crystal grains formed by secondary recrystallization are regulated so as to have an average beta angle of 2.0 degrees or less and the crystal grains formed by secondary recrystallization which have a grain diameter of 10 mm or more are regulated so as to have an average width of beta-angle fluctuations of 1-4 degrees. Due to the formation of the linear grooves for magnetic domain refinement, a grain-oriented magnetic steel sheet reduced in iron loss can be obtained.

The invention provides a stereotaxic apparatus capable of guiding in real time, which comprises a stereotaxic apparatus and a sensor. The stereotaxic apparatus part comprises a chassis, a bow frame and a fastener, wherein the fastener is provided with a guide hole and has adjustable tightness; the sensor part comprises an alpha angle sensor, a beta angle sensor and a distance sensor. Because the sensor is arranged on the stereotaxic apparatus, and an operator can be guided in real time, thereby not only binging convenience for an operation, but also improving the operation quality.

The invention discloses a method for calculating soil pressure of limited soil. The method comprises the following steps: determining profile parameters of a foundation pit profile and limited soil, setting the included angle between a fracture plane of the limited soil and the horizontal direction, performing force analysis on a fractured slide body, obtaining the weight of the fractured slide body, establishing an equation set by utilizing known parameters according to static balance conditions in the horizontal direction and the vertical direction, substituting an expression of soil pressure of the limited soil, deriving a shearing damage angle for soil pressure of the limited soil, enabling a derivative equation to be zero, obtaining a shearing damage angle value, reversely substituting the shearing damage angle value into the expression of soil pressure of limited soil, calculating a numerical value, namely soil pressure, generated on a surrounding structure, of every linear meter of limited soil. According to the method disclosed by the invention, values of beta angles are different, different limited soil boundary conditions are contained, stress characteristics of limited soil are sufficiently taken into consideration, and a fracture plane direction angle of limited soil is derived, so that active pressure, which conforms to reality, of limited soil is calculated, and therefore, the method has a very good popularization application value.

The invention relates to the field of metal solidification and continuous casting, in particular to an integrated-shaft and three-roller corner rolling device for continuous casting billet corner rolling. The device comprises a middle positioning roller (1), an upper chamfer roller (2-1), a lower chamfer roller (2-2), a roller shaft and a roller supporting frame (4); the roller shaft comprises a middle roller shaft section (3) and chamfer roller shaft sections (6) at the two ends; the chamfer roller shaft sections (6) and the middle roller shaft section (3) are arranged in an alpha angle manner; the middle positioning roller (1) is mounted on the middle roller shaft section (3); the upper chamfer roller (2-1) and the lower chamfer roller (2-2) are respectively mounted on the chamfer roller shaft sections (6); the chamfer roller shaft sections (6) are connected with the roller supporting frame (4); the alpha angle is 0-45 degrees; a roller surface slant angle beta of each chamfer roller is 30-70 degrees; and the alpha angle is less than or equal to the beta angle. The device effectively avoids the defects of shear cracks arising from shear rolling, an optimized casting billet corner chamfer shape can be obtained, and split or surface upwarping of the edge of a plate is eliminated.

The invention provides a laser gyro combined offset frequency method, belonging to the technical field of inertial navigation equipment. The method comprises the following steps: combination with two-way constant speed and mechanical shaking is adopted; a 1-3 axis laser gyro group is arranged on a two-way constant-speed offset-frequency rotary platform rotating around a vertical axis, all sensitive axes of the laser gyro are deviated from a beta angle of a rotary axis of the offset-frequency rotary platform and are driven by the rotary platform to rotate, and a component (alpha & cosine beta)of the rotary angle speed (alpha &) on all the sensitive axes of the laser gyro is the offset-frequency angle speed of the laser gyro; and simultaneously, the rotary angle speed (alpha &) carries outrotary modulation on the error of the laser gyro axis. In the laser gyro combined offset frequency method adopting combination of two-way constant speed offset frequency and mechanical shaking offsetfrequency, not only is the accuracy guaranteed, but also the difficulties for design and manufacture are reduced. The laser gyro combined offset frequency method can be used for high-accuracy laser gyro strapdown inertial systems.

The present invention discloses an array type photobioreactor light splitting method, and belongs to the technical field of microalgae culture. The array type photobioreactor light splitting method comprises that: 1, at least two photobioreactors are arranged on the ground in a front-rear parallel manner and in an array manner at a certain interval, wherein the orientations of the two photobioreactors are free; and 2, along with the changes of the sun altitude angle and the azimuth angle, at least one of the elevation angle alpha and the azimuth angle beta of the effective breeding surface of the photobioreactor is adjusted, such that the length of the vertical shadow produced after sunlight projects onto the photobioreactor is not less than the distance between the adjacent photobioreactor bottom edges in the vertical shadow length direction. According to the present invention, the alpha angle and/or beta angle is adjusted, such that the direct illumination does not produce the light leakage on the ground so as not to cause energy loss.

The invention relates to a teeth-like self-cleaning top comb for a cotton comber. Tooth sheets (2) are connected between a straight panel and a bent plate (3); the cross section of the tooth sheets (2) is of a wedge shape, wherein an alpha angle is 11 to 13 degrees; a beta angle is 17 to 19 degrees; and a gamma angle is 9 to 11 degrees; C and E are connected through an arc, the value of R is 2.3 to 3 mm, and edges of the C and the E are clearance angles and have no burr; the values of the C and D are 0.200 to 0.05 mm, the BC value of a working height of a tooth sheets section is 5.5+/-0.015 mm, the value of AB is 3 mm, the value of BE is 0.6 to 0.8 mm, and the value of BF is 2.06 mm; and the alpha value of the lower end of the tooth sheets section thickness is 0.06 to 0.08 mm, and the beta value of the upper end of the tooth sheets section thickness is 0.20 to 0.25 mm. The top comb has the good carding effect, and self-cleans carded neps, flocks and impurities in the process of carding, so that the use performance of the top comb is improved and the working efficiency is improved.

The quick detection method for punched steel plate polar diagram data belongs to the field of X-ray detection technology. From eight polar diagrams of different crystal plane indexes {110}, {200}, {211}, {220}, {310}, {222}, {321} and {400}, 2-6 is selected as the tested polar diagrams. In 2D X-ray detection system, the polar diagram data in some alpha angle and some beta angle ranges. There data are utilized to ensure the consistency of the polar diagram method and traditional measurement method. The present invention has detection period only one percent of that in traditional detection method and has raised in-situ measurement precision. The present invention is suitable for industrial application.

The invention provides a method for portable folding a novel multi-rotor unmanned aerial vehicle. Firstly, foldable propellers are folded to the direction of a vehicle body, the folded foldable propellers are aligned with corresponding foldable vehicle arms; the foldable vehicle arms are coaxially hinged to vehicle arm bases, at the moment, the vehicle arms are rotated and folded so as to be perpendicular to the vehicle arm bases, and the foldable vehicle arms form an alpha angle with the vertical direction; and the foldable vehicle arms continuously rotate for a beta angle to the direction of the vehicle body, and the portable folding of the vehicle arms is completed. According to the method for portable folding the novel multi-rotor unmanned aerial vehicle, the dimensions of the length and the width of the multiple rotors after being folded can be greatly compressed by adopting a method that folding of the vehicle arms in a tilt space is matched with folding of the propellers, meanwhile, relative to vertical folding of the vehicle arms, the requirements for the height of an undercarriage can be lowered greatly, the dimension of the overall vehicle after being folded is reduced to a largest extent, and the portability of product transporting is improved effectively.

The invention relates to a yaw maneuvering control method and system of a spacecraft by using a virtual sun vector. The yaw maneuvering control method comprises the steps that a vector expression of areal sun vector in an orbit coordinate system of the spacecraft is obtained; the included angle between the real sun vector and an orbital plane is calculated according to the expression of the realsun vector, and a Beta angle of the real solar vector is obtained; a threshold valve interval for one or more Beta angles is preset, the corresponding relationship between a Beta angle of the virtualsun vector and the Beta angle of the real solar vector which are set in the preset threshold valve interval is set; when the Beta angle of the real sun vector enters into the set threshold valve interval, the virtual sun vector is started to be calculated in real time according to the Beta angles of the real sun vector and the virtual sun vector; a target yaw angle of the spacecraft is calculatedaccording to the virtual sun vector; and according to an own attitude control system of the spacecraft, a yaw maneuvering angle of the spacecraft is controlled in real time to track the target yaw angle, and the yaw maneuvering control of the spacecraft implemented by using the virtual sun vector is realized.

The method for solving the control angle of the high-precision adjustable Kudt mirror relates to the field of measurement, and can obtain an accurate expression of the control angle of the adjustable Kudd mirror. The method is as follows: in the laser emitting system, the incident laser light is reflected by multiple Kudd mirrors and adjustable Kudd mirrors, and the outgoing laser direction is parallel to the direction of the visual axis, and finally points to the space target located on the extension line of the visual axis of the imaging optical system. ; When the azimuth angle of the space object deviated from the visual axis is A, and the pitch angle deviated from the visual axis is E, by adjusting the adjustable Kudd mirror to rotate β angle around its own azimuth axis, and then rotate γ angle around its own pitch axis, Make the outgoing laser point to the space target again; the solution formulas of the β angle and γ angle are shown in formula (2) and formula (3), and A and E are known: Using formulas (2) and (3) to solve the control angle of the adjustable Kudt mirror can achieve extremely high pointing accuracy of the outgoing laser light under any turntable tracking error.

The invention relates to reflection imaging, and relates to an imaging device that at least two layers of transparent images can be displayed in the same direction, and two layers or more than two layers of transparent images can be seen from multiple directions. The imaging device comprises a display screen and reflection boards which are used for enabling the display screen to be reflected by the corresponding reflection surfaces of the reflection boards so that the image in the display screen can be imaged at the corresponding position. The imaging device is characterized by comprising at least one set of display screen. Each set at least comprises one display screen. There are at least three reflection boards, wherein an alpha angle is formed between the reflection surface of at least one reflection board and the reflection surface of another reflection board, the alpha angle is greater than or equal to 30 degrees and less than or equal to 90 degrees, a beta angle is formed between the reflection surface of at least one reflection board and the display surface of the display screen, and the beta angle is greater than or equal to 30 degrees and less than or equal to 60 degrees. The reflection boards are total reflection boards or semitransparent reflection boards. Reflection thin films are coated on the reflection boards and used for enhancing light ray reflection capacity of the reflection boards.

The invention relates to an illumination super-resolution fluorescence microscopic imaging method and device for microstructure light and belongs to the field of optical super-resolution microscopic imaging and fluorescence detection. A microstructure light generation device is composed of a polygonal frustum of a prism and multiple linear lasers; the polygonal frustum of a prism is made of a transparent material, the area of the lower bottom surface is larger than that of the upper bottom surface, the included angle between each side surface and the bottom surface of the polygonal frustum ofa prism is beta, two or more side surfaces of the polygonal frustum of a prism are provided with the linear lasers, all the linear lasers can be reflectively transmitted at the beta angle in a zigzagshape between the upper and lower bottom surfaces of the frustum of a prism, partial light can be reflected and leak every time that light is vibrated to the upper bottom surface, and finally clear strip structure light can be generated on the upper surface of the device. The illumination super-resolution fluorescence microscopic imaging method and device for the microstructure light can be applied to a super-resolution fluorescence microscopic system.

The present invention relates to the amino acid sequence with the structure characteristics of dodecapeptide. It features that the amino acid constituting dodecapeptide are divided into three parts; 4 amino acids at amino terminal, 4 central amino acids and 4 amino acids at carboxy termin, which can form stable alpha-helix and beta-angle to destroy the cell membrane, so playing its antibacterial role. It can also be used to synthesize relative isomer to increase its stability in human body and its possibility of using it as gastrointestinal medicine.

The invention provides a processing method of a right-angle helicoidal surface. The processing is carried out through utilizing a single-blade double-curved surface profile-shaped milling cutter. The processing method comprises the steps of during the right-angle helicoidal surface processing process through the single-blade double-curved surface profile-shaped milling cutter, maintaining the axis of the single-blade double-curved surface profile-shaped milling cutter and the axis of the right-angle helicoidal surface to form an alpha-degree angle, and maintaining the distance between the axis of the single-blade double-curved surface profile-shaped milling cutter and the axis of the right-angle helicoidal surface to be b till the processing of the right-angle helicoidal surface is over, wherein alpha is 90 to beta; beta is an include angle between a generating line of the single-blade double-curved surface profile-shaped milling cutter and the axis of the single-blade double-curved surface profile-shaped milling cutter; beta angle is calculated through the formula that beta equals to arctan (2pi*c/h); h is the lead of the right-angle helicoidal surface; c is the minimum distance between the generating line of the single-blade double-curved surface profile-shaped milling cutter and the axis of the single-blade double-curved surface profile-shaped milling cutter; and c equals to b. According to the processing method, the right-angle helicoidal surface with a relatively small error can be processed on a milling machine.

The invention discloses a method for determining a beta angle changing curve of a planar double enveloping worm. The method includes the steps that a space coordinate system is established according to a beta angle changing planar double enveloping worm forming principle, the beta value is set to be a function of worm gear turn angle phi<2>, and beta angle changing addendum thickness equation delta and tooth surface undercutting discriminant equation r1 are derived on the basis of an envelope method principle; the minimum side addendum thickness value delta<min> meeting the requirement of no sharpening is calculated according to worm parameters; the addendum thickness is made to change regularly and linearly in the worm helical line direction from side teeth to throat teeth; multiple worm gear turn angles phi<2> are obtained according to an equal difference rule to obtain the corresponding thickness values so as to form feature points (phi<2>, delta (beta)); the beta value which each point corresponds to is obtained through the beta angle changing addendum thickness equation, the beta curve is fitted, the fitted beta curve is substituted into the tooth surface undercutting discriminant equation, and an undercutting line is drawn on a worm tooth surface graph; and the undercutting ratio is estimated, if the design requirement is met, the operation is finished, if the design requirement is not met, throat addendum thickness delta<h> is reduced or the addendum thickness change rule is changed to a cosine rule, and the operation returns to the step 3.