81 results about "Effective angle" patented technology

A vibration actuator includes an electromechanical transducer having a magnetic circuit (1-4) and a driving coil (5), a support frame (9), and a damper (270) elastically supporting the magnetic circuit onto the support frame to flexibly damp the vibration of the magnetic circuit when a driving AC current is supplied to the coil (5). The damper (270) comprises inner and outer ring portions (271, 272) and a plurality of spiral spring portions (273) determined by a plurality of spiral slits (274, 275) formed in the damper. In order to reduce the spiral spring portion determined by the adjacent two spiral slits in its compliance, each of the spiral spring portions has an effective spring length determined by an effective angle (theta) which is determined as an angle (by angular degree) from an inner end of the inner spiral slit to an outer end of the outer spiral slit defining each respective spiral spring portion around a center of the damper. The effective angle is 55 angular degree or more. In a preferable example, the effective spring length is determined by a product (r.theta) of an average radius (r) value by the unit of "mm" and the effective angle (theta) value by unit of the angular degree. The effective spring length is selected to 320 or more, and preferably 400 or more.

The invention discloses a method for obtaining mining area earth surface three-dimensional deformation fields through a single interferometric synthetic aperture radar (InSAR) interference pair. The method includes that a mining field radar sight deformation field is obtained through an InSAR technology, pixels with coherence which is lower than an unwrapping threshold value in the sight deformation field is subjected to spatial interpolation to obtain a spatial continuous deformation field, main effective radius of each pixel is calculated through mining area working face distribution and main effective angles, after mining area horizontal shifting coefficients are obtained, the mining area earth surface horizontal shifting is converted to an expression of a sinking value, an equation set is formed according to the radar imaging principle, the equation set is solved to obtain a solution of the earth surface sinking value, according to the sinking value, tilting values of east, west, south and north directions are calculated, and the deformation fields of the east, west, south and north directions are calculated according to a proportional relation among the tilting values of the east, west, south and north directions and the horizontal shifting. The method has the advantages that the restrictions that when the three-dimensional deformation field is solved by the aid of the InSAR, the requirements for data are strict, the monitoring cost is high and the like are broken, and the application space of the InSAR technology in the mining area is greatly widened.

The invention discloses a forming method of a square pipe with high strength, thick walls, small cross sections and double sharp corners. The method comprises the steps of determining the width of a longitudinal cutting steel belt of a steel coil and the wall dimensions of the square pipes 1-4 according to the sectional dimensions of the square pipe to be formed; determining cold roll forming passes and the optimal forming angle of each pass; determining the rolling center line of the steel belt; slicing two side ends of the steel belt into angled end faces; implementing cold bending deformation for each edge of the steel belt according to the set forming passes and the forming angle, and welding the two side ends closed at high frequency; and shaping and straightening the top sharp corner and the bottom arc angle of the square pipe welded through matching squeeze rollers. The forming method disclosed by the invention has the beneficial effects that the horizontal projection of pass deformation can be reduced effectively by adopting multi-pass cold roll forming, so that the resilience of the effective angle is reduced, and the stability of the product forming process is ensured; and at the same time, the walls of both ends of the square pipe are formed at symmetrical angles, so that the welding small edge and the lumbar resilience of the product can be reduced effectively.

An III-N semiconductor HEMT device includes an electrode-defining layer on a III-N material structure. The electrode-defining layer has a recess with a first sidewall proximal to the drain and a second sidewall proximal to the source, each sidewall comprising a plurality of steps. A portion of the recess distal from the III-N material structure has a larger width than a portion of the recess proximal to the III-N material structure. An electrode is in the recess, the electrode including an extending portion over the first sidewall. A portion of the electrode-defining layer is between the extending portion and the III-N material structure. The first sidewall forms a first effective angle relative to the surface of the III-N material structure and the second sidewall forms a second effective angle relative to the surface of the III-N material structure, the second effective angle being larger than the first effective angle.

The invention discloses a rotation control method of a three-dimensional laser scanner. The method comprises the steps that: (S1) a prism rotates, before an angle feedback module detects that the first surface of the prism is about to enter an valid angle, and the angle feedback module feeds a signal to a single chip microcomputer to control a horizontal rotation platform to stop rotation; (S2) the prism continues to rotate, the angle feedback module detects that the first surface of the prism rotates for a valid angle and is in an invalid angle, the angle feedback module feeds a signal to the single chip microcomputer to control the horizontal rotation platform to rotate for a horizontal stepping angle and then stop; and (S3) the prism continues to rotate, before the angle feedback module detects that the second surface of the prism is about to enter a valid angle, the angle feedback module feeds a signal to the single chip microcomputer to control the horizontal rotation platform to stop rotation, and the above step is repeated until the prism is rotated for a circle. According to the method, the rotation speed and rotation angle of the horizontal rotation platform are controlled by the angle n synchronous coordination control of the prism so as to achieve the effect of optimizing scanner point cloud.

The invention discloses a single-line laser radar obstacle detection method for a fully automatic unmanned rail vehicle. The method comprises steps of a, transmitting, by a laser radar, a data frame to a controller; b, processing each frame of data; c, performing image segmentation; d, converting the data into Cartesian coordinates; e, performing calibration and standardization; f, determining thecorresponding angle of the driving direction of the laser radar; g, intercepting data within a valid angle range; h, performing a Hough transform and obtaining a scan curve of track walls or guardrails on both sides of the rails; i, performing a sliding mean filtering process on two linear parameters; j, determining whether there is an obstacle and feeding a result back to the controller. Compared with the prior art, the single-line laser radar obstacle detection method of the invention is an important part of a vehicle driving safety guarantee system, can ensure that the unmanned rail vehicle can accurately detect obstacles that may collide with the rail vehicle during the driving process, and takes effective measures to avoid collision accidents.

The invention provides a photodiffusion film, a backlight module with the photodiffusion film and a liquid crystal display with the photodiffusion film. The photodiffusion film comprises a liquid crystal and a polymer, wherein the liquid crystal is diffused by the polymer. With the adoption of the photodiffusion film, the purposes of increasing the brightness of the backlight module and the utilization rate of light, enlarging effective angle emission light and thereby expanding a view angle of the liquid crystal display without increasing the thickness, the manufacturing complexity or the cost are fulfilled.

The invention discloses an angle lapping device for a power electronic device. The angle lapping device comprises a bottom plate, bracket devices, electric cylinder devices, fixing devices I, a lapping device and fixing devices II, wherein a recycling box and a first bent rod are arranged on the bottom plate; the bracket devices comprise first supporting rods, first fixed rods, first cross rods, second bent rods, first vertical rods and second cross rods; the electric cylinder devices comprise electric cylinders, push rods and push plates; the fixing devices I comprise second vertical rods, first connection rods, first springs and second connection rods; the lapping device comprises a collection box, a lapping wheel accommodated in the collection box and brush bristles arranged in the collection box; and the fixing devices II comprise bent plates, second springs arranged on the bent plates, pressing plates arranged on the second springs, third connection rods arranged on the pressing plates and clamping plates arranged on the third connection plates. The angle lapping device can effectively fix the power electronic device and carry out effective angle lapping on the power electronic device, and is high in angle lapping efficiency and good in angle lapping effect.

A test apparatus for measuring the cohesive, adhesive and frictional properties of bulk solids has a bulk solid sample confined between two essentially parallel plates with a single load applied that produces both shear and normal stress and strain to the bulk solid in a manner that nearly uniformly distributes stress throughout the granular solid test region. The apparatus has a close proximity of the plates compared with the length of the plates in the direction of shear, the design of a load hanger to produce a resultant load near the shear plane, the roughening of any surface in contact with the solid that is not intended to have shear on it and involves one-directional movement of the parallel plates with respect to each other and the control of both the direction and magnitude of the applied load relative to the parallel plates. A test method uses the apparatus to measure the unconfined yield strength angle of internal friction and steady state deformation effective angle of internal friction with a single test. A test method uses replacement of the lower part of the test sample with a plate of material that the bulk solid may be required to slip on and measures the friction angle and adhesion of the bulk solid on the plate of material.

A prism sheet and a liquid crystal display (LCD) device having the same are provided to improve optical efficiency of the prism sheet by changing a refractive angle of light, which is incident at an angle less than a minimum angle to an effective angle, by forming a concave surface on a bottom surface of prism patterns. Optical efficiency of the prism sheet is also improved by refracting light, which is incident at an angle more than a maximum angle, toward the adjacent prism pattern, by forming the bottom surface of the 2n^th prism pattern in a groove of a base film.

The invention relates to a technology for realizing the display of images and characters by laser scanning, in particular to a method for realizing display of image and character in three-dimensional space by laser scanning. The invention is characterized in that the same image or character or the image and the character are synchronously scanned and output at the same time in the same space by the control of a plurality of laser beams emitted by a plurality of lasers. As the laser beams are controlled from different angles, the same image or character or the image and the character are scanned and output in a superposition way simultaneously in the same space, therefore, each beam of laser generates scattered light toward different directions when being converged into a point in the space, and all spectators on the ground can view the image output by scanning at effective distance and effective angle.

The present invention relates to a method for auto angle setting of an infrared sensor module having a light emitting unit and a sensor unit arranged at least two corners of a display panel, includes the steps of selecting a peak detection mode or a slope detection mode; in the peak detection mode, setting a pixel of in the sensor unit which senses a light quantity as a reference point corresponding to a corner other infrared sensor module is arranged at; in the slope detection mode, analyzing the light quantities of a start pixel block and an end pixel block in the sensor unit and setting a pixel which forms a greatest slope as a start point or an end point; and setting an effective angle of view in the sensor unit with reference to the reference point, the start point, and the end point.

The invention discloses a downlink channel estimation method for a massive MIMO communication system based on real-valued sparse Bayesian learning. The method comprises the following steps: 1: adopting a uniform linear array with N antennas by the base station, adopting a single antenna by the downlink user, within T moments, transmitting the pilot signal matrix X by the base station, and receiving the signal y=phi(beta)s+n; 2: defining the real-valued matrix QN; 3: defining X=GQN, and constructing the real-valued received signal matrix Y=phi(beta)S+N; 4: setting the number of iterations to count the variable k=1, setting respective elements in the precision vector (FORMULA referred) of the initialization s as 1, setting the initialization noise precision alpha=1, and setting the initialization beta as an all-zero element; 5: fixing delta and beta, and updating alpha by using the SBL principle and expectation maximized criterion; 6: fixing alpha and beta, and updating delta; 7: fixingalpha and delta, and updating beta; 8: determining whether k reaches the upper limit K or whether delta is converged, if not satisfied, k=k+1, and returning to 5; 9: setting a threshold eta, and selecting an effective angle set omega of the channel by using eta; and 10: estimating the final channel according to omega.

A character region extracting apparatus and method which extract a character region through the calculation of character stroke widths are provided. The method includes producing a binary image including a candidate character region from an original image; extracting a character outline from the candidate character region; acquires character outline information for the extracted outline; setting a representative character stroke width and a representative character angle in each of the pixels forming the outline, based on the character outline information; and determining a character existing region in the candidate character region by confirming the ratio of effective representative stroke widths and effective angles as compared to the entire length of the outline. Accordingly, it is possible to efficiently determine whether one or more characters exist in the candidate character region.

The invention discloses a hypersonic-speed wave-riding duck wing aerodynamic layout, and belongs to the design field of aerodynamic layout of a hypersonic-speed aircraft. The layout integrates a wave-riding design in selection of wing surface parameters of a duck wing and a main wing, so that hypersonic-speed aerodynamic characteristics of the aircraft can be improved while a capacity rate is guaranteed; the duck wing layout can greatly improve low-speed characteristics of the aircraft, and an aerodynamic focus of the aircraft can be prevented from greatly moving in a wide-speed area, so that low-speed and high-speed aerodynamic/controllability and stability are realized; opposite positions between a wave-riding duck wing and a wave-riding main wing are reasonably designed, and an effective angle of incidence of the main wing is increased by an up-washing region of wave-riding duck wing trail flow, so that the hypersonic-speed aerodynamic characteristics of the wave-riding main wing are further improved.

The invention discloses a downlink channel estimation method of a large-scale MIMO communication system based on uplink channel information assistance. The method comprises the following steps: step 1: adopting, by a base station, a uniform linear array with N antennas, adopting, by a mobile user, a single antenna, sending, by the mobile user, a pilot signal, and estimating, by the base station, an uplink channel by using a classical least squares method after receiving the signal, and marking the uplink channel as (the formula is described in the specification); step 2: sending, by the base station, a pilot signal matrix X within T moments, and then, marking the signal received by the mobile user as y; step 3: initializing relevant variables l, w, (the formula is described in the specification), alpha and (the formula is described in the specification); step 4: updating alpha, (the formula is described in the specification), gamma and tau; step 5: updating beta; step 6: judging whether an iteration count variable l reaches an upper limit L or whether gamma converges, if both conditions are not met, making the iteration count variable l=l+1, and returning to step 3; step 7: settinga threshold eta, and selecting an effective angle set omega of a downlink channel by using the threshold; and step 8: estimating a final downlink channel (the formula is described in the specification) by using the effective angle set omega.

A webbing insertion member in which a webbing hardly shifts within an opening during the operation of a pretensioner mechanism. The insertion member includes a bearing portion and an opening through which the webbing passes. In order to prevent the shifting of the webbing in the longitudinal direction of the opening, the length of the opening is substantially the same or slightly greater than the width of the seat belt. As a result, the left and right sides of the webbing confront the ends of the opening to thereby prevent the webbing from shifting laterally in the opening. An effective angle between the bearing portion and a sidewall of the opening is between a range of 50 to 70 degrees to limit the displacement of the webbing.

Disclosed herein is a method for auto-depicting trends in object contours (referred to as ADTOC). At the heart of ADTOC is a sifting process to determine a significant angular value via evaluating a plurality of angular values in a predefined range. ADTOC is characterized in that a probe-ahead concept is applied to obtain a reference angular value along the current route, and then the probed angular value is used to modify the significant angular value in order to timely correct the subsequent trace direction, thus achieving more accurate trace result. Contours with discontinuous segments caused by noise, obstacles, illumination, shading variations, etc. can also be auto-depicted without requiring a predefined auxiliary route.

It is proposed a method for selecting an effective angle of reception of a directional antenna of a receiver node, the receiver node belonging to a wireless communications network comprising a plurality of emitter nodes.

The method is implemented by the receiver node and comprises steps of:

• • determining at least two possible angles of reception associated with a first emitter node, and
  • for each of said at least two possible angles of reception, determining a difference between that angle and an angle of reception associated with a second emitter node different from said first emitter node, and selecting the effective angle of reception from among said at least two possible angles of reception associated with said first emitter node as a function of the determined differences.

A lightweight, easily portable, collapsible, and easy to assemble personal-use sunshade is designed for use at beaches or other expanses of loose or non-compacted sand, compacted soil or solid surfaces. The sunshade assembly comprises a frame assembly and a shade assembly pivotably coupled to it, with pivot locking means so that the shade can be positioned at any effective angle.

The invention belongs to the technical field of aircrafts, and particularly relates to a wing with pits. The wing comprises a front edge, an upper surface, a lower surface, a rear edge and a wing body. The front edge is thick and round, the upper surface is an upwards-protruding curved surface, the lower surface of a plane or a curved surface which slightly protrudes downwards or a curved surface which is slightly concaved upwards, the identical small pits are evenly distributed in all the area, from the thickest portion of the wing to the rear edge, of the upper surface in the wing chord direction, the average depth of the small pits is about 0.25 mm, the largest boundary dimension of the small pits is between 1 mm and 10 mm, and the clear distance between every two adjacent small pits is between 1 mm and 3 mm. The largest lift-drag ratio of the wing is large, the range of the effective angle of incidence is large, and the wing is not prone to stalling, high in efficiency and high in strength.

The invention relates to a triangular column flow guide cover type wind driven generator comprising a box body provided with an air inlet and an air outlet. The box body is provided with at least one wind power generation module; the wind power generation comprises two rotary air plates which can push a generator set to move; an air opening adjusting unit capable of adjusting the size of the air inlet is arranged at the part which is close to the air inlet, and a triangular column flow guide cover is arranged outside the air opening adjusting unit, wherein the air blows to the air inlet of the box body and the triangular column flow guide cover can guide an air flow to pass through the air inlet; the air blows in an effective angle to push the two rotary air plates to move and reduce a cancelling acting force; and the rotating power of the two rotary air plates are combined to rotate the generator set and an air inlet amount of the air opening adjusting unit is adjusted to the best state so as to stably operate the generator set. The triangular column flow guide cover type wind driven generator has the advantages of capability of saving an occupied space, low cost, easiness of being maintained and high durability, and the wind power generation module is additionally arranged according to the requirements so as to improve the power generation amount.

A ceramic carrier LED fluorescent tube, including a lamp tube cover and double-leg joints connected to both ends of the cover, an integrally formed ceramic substrate is provided inside the cover, and the surface of the ceramic substrate includes at least one side for The LED installation surface for installing the LED lamp and the power supply installation surface used to drive the LED lamp work are all screen-printed with a circuit made of conductive paste on each of the LED installation surface and the power supply installation surface. It is cheaper to produce, dissipates heat better, and increases the effective lighting angle.