134 results about "Entrance angle" patented technology

The invention provides a puncturing guide (1, 16) for guiding a puncturing needle into a target site within the body of a patient. The puncturing guide (1, 16) comprises a base plate (2, 17), a needle guide (3, 18), a retainer (4, 19) for securing the needle guide (3, 18) to the base plate (2, 17), a first segment (7, 20) of a first semi-sphere, a second segment (8, 21) of a second semi-sphere, and a needle guide (3, 18) attached to the second segment (8, 21). During a positioning operation, the second segment (8, 21) slides on the first segment (7, 20), so that the needle guide (3, 18) is movable around the center of the first semi-sphere, which is in level with the underside of the base plate (2, 17), thereby providing the possibility to position the tip of a puncturing needle at a puncturing point on the patient's skin and then, in a separate operation, set the entrance angle of the puncturing needle without changing its entrance point.

A light source which may be used as part of a dental curing lamp is comprised of at least one, and preferably a plurality, of LEDs. To increase the efficiency of the light output the LEDs are encapsulated in a beam converger including an extractor portion and a collimator portion. Light rays leaving the collimator portion have an angle which matches the entrance angle input requirements of an associated light guide. In another aspect, cooling of LEDs is accomplished by reservoirs located in a hand piece and in a base station. In another aspect of the invention, cooling is achieved by use of a heat pipe and a cooling jacket. The cooling jacket may contain a material having a high latent heat of fusion at a phase change temperature suitable for cooling the LEDs.

The present invention discloses an apparatus for measuring spectrum and image with high spatial resolution and spectral resolution. The apparatus comprises an imaging side telecentric lens for collecting light from an object, an optical slit positioned behind the imaging side telecentric lens, an aspheric lens for collimating lights from the optical slits, a dispersing device for separating the lights of different wavelengths into a plurality of sub-rays of different entrance angle, an achromatic lens for focusing the sub-rays, and an optical sensor for detecting the optical intensity of the sub-rays. The dispersing device can be a transmission or reflection diffraction grating, and the optical sensor may consist of a plurality of photo-detectors positioned in a two dimensional array.

The invention discloses a six-reel steel band armouring machine, comprising a front mounting bracket and a rear mounting bracket, a rotor, six steel band reels, an active band releasing device, a band conduction device, an conductive device, a center adjustable protection tube, a brake apparatus, a motor driving device, an installation base plate and the like. The steel band armouring machine provided by the invention is used for manufacturing fluid delivery high pressure hoses and large-size power cables and controlling cables like a large-size petroleum pipeline, and adopts advanced mechanical structures and electrical appliance control technology to control the rotation speed of six band releasing motors, thus realizing that six steel bands are wound on large-size hoses or cables synchronously with same tensile force and accurate entrance angles, thereby achieving steel band armouring. The invention has advanced control technology, reasonable mechanical structure, simple operation and wide application range.

The invention provides a blind hole internal gear fine forming method and an internal gear forming die relating to the metal machinery processing and metal pressing fields of no cutting. The technical steps includes: computer simulation analyzing to study out a process forming scheme-baiting to manufacture roughs-surface intenerating and lubricating processing-fine forming-cutting off redundant part. A convex die profile of an internal gear forming die is corrected according to a gear precision grade tolerance belt and the gear precision is 6 to 5 grade. The surface roughness of the convex die is smaller than 0.5 micron. The thickness of a surface nanometer coat is 0.002 to 0.004 millimeter. A die entrance angle of at end surface of the gear is transited by a semi-arc. An effective width of a minor first flank is between 1.5 and 3 millimeter. A double surface back gap of the minor first flank is 0.3 millimeter smaller than the minor first flank by average. The transition cone angle between the minor first flank of the convex die and a basic die is 3 to 6 degrees. A concave die is formed through interference pressure distribution by adopting 2 to 3 layers of compound dies. The magnitude of interference is 0.4 to 0.5 percent of a matched dimension of a die. The invention has the advantages of short technique line, high manufacture efficiency, good consistence of the gear precision and high intensity.

A medical device includes a curved tubular body configured for being used as an extravascular device to support vein maturation following the formation of an arteriovenous fistula. The tubular body is curved. The tubular body has an entrance angle of less than about 40 degrees to improve blood flow from the artery into the vein. And the tubular body includes a cuff or edge at the proximal end to stabilize the tubular body at the fistula.

A pump for immersion in a fluid reservoir, such as a pit or lagoon containing liquid manure, from a position at an edge of the reservoir. The pump may be adapted for connection to a farm vehicle, such as a tractor, positioned at the edge of the reservoir. The pump comprises an extensible body, fluid conduit and drive means in order that a length of the pump may be varied in order to accommodate a variety of reservoir fluid heights. In addition, the pump may be pivotable relative to at least a portion of a frame in order that the entrance angle may be adjusted. The pump comprises a bottom housing with a bottom inlet and at least two tangential fluid outlets that are upwardly angled towards the conduit. A combiner is provided to merge the outlets with the fluid conduit. An impeller within the housing is shaped to transfer fluid tangentially and upwardly within the housing to co-operate with the upward angle of the outlets. These features reduce fluid pressure loss and thereby increase fluid flow rate through the pump for a given input power.

According to an embodiment disclosed herein, an apparatus for cooling a rotating part having cooling channels therein, the rotating part attaching to a disk rotating about an axis, the disk having a conduit for feeding a cooling fluid to the cooling channel is described. The apparatus has a first impeller rotating with the disk and in register with the conduit and an outer periphery of the disk, the impeller directing the cooling flow to the conduit.

A single molecule fluorescence sample quick longitudinal super resolution method uses total internal reflection fluorescence detecting system. Depth of penetration of exciting field is changed by entrance angle of laser beam being changed in detecting course, according to functional relationship of imaging intensity of single molecule fluorescence having relationship with depth of penetration depth, information of longitudinal interval between fluorescence molecule, absolute longitudinal position and diameter of that are rebuilt. The invention can realize nanometer magnitude longitudinal super resolution of fluorescence molecule, has simple and fast operation and excitation and detection having no touch with sample, can detect sample of solid state and under liquid circumstance and obtain several parameters with once measurement.

An electro-optical crystal electro-optical factor measure method and device comprises the following steps: a laser with visible wave bands passes a polarizing lens, a ground glass, a to be tested electro-optical crystal and a polarization analyzer in sequence, and a white screen receives an exit light spot and an interference pattern formed by diffusion light caused by the ground glass; a polarization direction of the polarizing lens and the polarization analyzer is vertical, and an adjustable DC voltage is applied to the to be tested electro-optical crystal; firstly, select a property laser entrance angle ([theta]0, [phi]0) through theory analysis, wherein the ([theta]0, [phi]0) refer to angles between an entrance laser propagation direction and each electric induction main shaft of the to be tested electro-optical crystal; in measurement, the DC voltage applied to the to be tested electro-optical crystal is adjusted to OV, an angle between the to be tested electro-optical crystal and the entrance laser is tuned, so the exit light spot can fall on a dark zone, corresponding to the entrance angle ([theta]0, [phi]0), in the interference pattern; the DC voltage is gradually boosted and the exit light spot position in the process does not change, and the interference pattern will change; when the exit light spot fall on next adjacent dark zone on the interference pattern again, the DC voltage value U is recorded; the corresponding electro-optical factor can be obtained through theory calculation.

A retroreflective article with excellent wide-angle characteristics is provided. Entrance angle characteristics, observation angle characteristics, and rotation angle characteristics are improved. In a retroreflective article, an assembly of multidirectional retroreflective elements is formed, in which either five, or seven or more unit elements are formed so as to share two common base edges forming the triangular base face of the unit elements and a common vertex at which the common base edges intersect, with an adjacent retroreflective element.

A polarizer and a method of producing the same are provided. A laminated body is clamped by a fixing device and a base of a grinding apparatus. And then, an edge of the laminated body is grinded by a grinding surface of a grinding device of the grinding apparatus with a given entrance angle to produce the polarizer with a great size precision.

The invention discloses a method and control system for automatically adjusting efficiency of a DC brushless motor according to loads. The system comprises the motor and a motor built-in control board, wherein the motor built-in control board comprises a VSP reading module, a rotating speed detection module, a current detection module and an entrance angle adjusting module; the VSP reading module is used for reading rotating speed instructions; the rotating speed detection module is used for rotating speed detection; the current detection module is used for detecting and processing operation currents; and the entrance angle adjusting module is used for setting an entrance angle and substituting a set value into a motor system. According to the invention, by use of the method and such a structure, the VSP reading module reads a target rotating speed, the rotating speed detection module confirms an actual rotating speed of the motor, through adjusting the entrance angle, the actual rotating speed of the motor matches the target rotating speed, working currents of the motor is sampled, and an optimal efficiency point of the motor is adopted, such that the motor can be adaptive to different systems, the development time of the motor and the type number of motors required by clients are reduced, the time efficiency of development is greatly improved, and the cost is decreased.

The invention discloses a honeycomb material large entrance angle low damage processing cutter and a honeycomb material large entrance angle low damage processing method. The processing cutter comprises a toothed cutterhead and a cutter bar component, wherein the cutter tooth of the toothed cutterhead is provided with a primary cutting edge, a secondary cutting edge and a side edge. According to the invention, a circular disc type cutter is adopted to cut and process honeycomb material; the position relation between the cutter and a workpiece hole lattice is determined according to theoreticalcalculation, so that the range of the entrance angle theta at a single-layer hole wall is equal to or greater than 90 degrees and less than 165 degrees as much as possible during the machining process, and the surface burr is effectively reduced; and in addition, the processing cutter with a positive edge dip angle is utilized to move the position of an entry point inwards, so that hole wall tearing due to defect expansion is avoided, and low damage processing of the molded surface, the chamfer and the cutting side of the honeycomb material is realized. The processing cutter can effectively cut off the low-rigidity complicated hole wall structure in the honeycomb material surface and reduces the surface burr; and moreover, the cutting edge inclination angle of the primary cutting edge facilitates inward movement of the entry point position, so that longer hole wall tearing due to defect expansion is avoided.

The invention relates to a method for adjusting the self-tracing pose of a mobile welding robot, which belongs to the technical field of automatic welding. The method comprises the following steps: getting the welding robot march toward the direction at an entrance angle of less than or equal to 90 degree, and searching a weld joint according to a characteristic model of a welding groove; according to the pose of the welding robot and the distortion characteristics of laser streaks projected on the groove, obtaining the initial entrance angle of the mobile welding robot; performing differential preadjustment to make the entrance angle of the mobile welding robot less than or equal to 20 degree; and applying a least square method to perform preweld self-tracing pose adjustment to position the mobile welding robot under the weld joint, wherein a bodywork of the mobile welding robot is parallel to the weld joint and a welding gun is positioned in the center of the weld joint. The method adopts closed-loop feed control, realizes precise self-tracing pose adjustment of the mobile welding robot at the entrance angle range of between 0 and 90 degree, is stable and reliable and has short adjusting distance and strong antijamming capacity on external environment.

The invention discloses an electronic cam control system of a programmable logic controller. The electronic cam control system comprises an encoder and a controller, and the controller comprises an FPGA signal processing module and an output circuit. The FPGA signal processing module comprises an encoder position decoding unit, a CPU and a signal comparison unit, wherein the encoder position decoding unit is used for decoding an encoded position data signal sent by the encoder, obtaining current position data of a mechanical shaft and calculating the current rotating speed of the mechanical shaft; the CPU is used for receiving the current rotating speed of the mechanical shaft, and calculating ON/OFF parameters of an actual action based on the current rotating speed of the mechanical shaft and based on ON/OFF parameters and entrance angle compensating parameters which are set by users; the signal comparison unit is used for comparing the ON/OFF parameters, output by the CPU, of the actual action and the current position data, output by the encoder position decoding unit, of the mechanical shaft, and if the current position data of the mechanical shaft are within the range of the ON/OFF parameters of the actual action, an on/off signal is sent to a corresponding action element so as to control actions of the action element.

A turbofan for blowing comprises: a base plate having a hub protruding from a center thereof; a plurality of blades disposed on an outer circumerential surface of the base plate with a constant interval therebetween in a circumferential direction; and a shroud connected to the blades in opposition to the base plate. An outer diameter of a fan, a height of the blade, an inner diameter of the blade, an inner diameter of the shroud, an entrance angle of the blade, etc. are designed with an optimum condition, there by improving a blowing efficiency for cool air and reducing power consumption and noise.