45results about How to "Precise curvature" patented technology

Disclosed herein are biomedical implants, and methods of using same, that are derived from bone. Particularly exemplified are implants having a tapered dowel shape that are useful for implantation in the spine, and especially in the cervical region of the spine. The taper of the implants disclosed herein provides an advantage over conventional implants, as it creates the proper support and angulation to maintain the proper curvature of the spine. Optionally, the implants taught herein are associated with osteogenic materials or other biomedical substances.

Equipment includes an image guide (1) consisting of flexible optical fibers with: on the proximal end side: a source (2), angular scanning elements (3), injection elements (4) in one of the fibers, elements for splitting (5) the illuminating beam and the backscattered signal, elements for spatial filtering (6), elements for detecting (7) the signal, electronic elements (8) for controlling, analyzing and digital processing of the detected signal and display; and on the distal end side: an optical head (9) for focusing the illuminating beam exiting from the illuminated fiber. The scanning elements include a resonant line mirror (M1) and a galvanometric field mirror (M2) with a variable frequency and two afocal optical systems adapted to conjugate the two mirrors (M1, M2) firstly in the field mirror (M2) and the injection elements (4) in the image guide in a second step.

A zoom lens has good optical performance, is compact, and has a high magnifying power, and is suitable for use in a video camera, a digital still camera, a cellular phone, or the like, and a image pickup apparatus employs the zoom lens. The zoom lens (1) includes a first lens group (GR1) fixed upon zooming and having a positive refractive power, a second lens group (GR2) having a negative refractive power, a third lens group (GR3) having a positive refractive power, a fourth lens group (GR4) having a negative refractive power, and a fifth lens group (GR5) having a positive refractive power, which are successively arranged in the order from the object side. At least the second lens group and the fourth lens group are moved for zooming. The first lens group includes a first single lens (G1) having a negative refractive power, a reflective member (G2) for bending an optical path through 90°, and at least one second lens (G3) having a positive refractive power, which are successively arranged in the order from the object side.

A vehicle control device is installed in a host vehicle and is equipped with external environment sensors that detect the surrounding environment of the host vehicle, and a map generating unit which generates a center line CL of a travel path on which the host vehicle travels, based on detection information detected by the external environment sensors. The map generating unit includes a determination unit, which determines whether a curvature of a provisional center line PCL or a change in the curvature is greater than a predetermined value. When the curvature or the change in the curvature is greater than the predetermined value, the curvature of the provisional center line PCL is corrected by a correction unit to be less than or equal to the predetermined value, and a center line CL is established.

A zoom lens has good optical performance, is compact, and has a high magnifying power, and is suitable for use in a video camera, a digital still camera, a cellular phone, or the like, and an image pickup apparatus employs the zoom lens. The zoom lens includes a first lens group fixed upon zooming and having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a negative refractive power, and a fifth lens group having a positive refractive power, which are successively arranged in the order from the object side. At least the second lens group and the fourth lens group are moved for zooming.

A walking system that includes a walking dish formed in any one of a circular shape, a semi-circular shape, and a polygonal shape; a rolling ball formed on an upper surface of a ball fixing device; multiple auxiliary balls having multiple rolling balls on the surface of the walking dish and formed below the rolling ball so that the rolling ball smoothly rotates in all directions in 360 degrees; the ball fixing device fixing the auxiliary ball and the rolling ball while allowing the auxiliary ball and the rolling ball to rotate in all directions in 360 degrees; and a ball fixing table formed with the ball fixing device for joining the multiple ball fixing devices on the inclined surface at a predetermined interval to allow a user to walk in all directions in 360 degrees according to a virtual reality or walking motion image.

A lane boundary line recognition device detects lane boundary line candidates of a roadway from images captured by an in-vehicle camera, judges that the lane boundary line candidate is a lane boundary line of a branch road, and calculates a curvature of the lane boundary line candidate, and recognizes the lane boundary line based on the calculated curvature. The device removes the lane boundary line candidate, which has been judged as the lane boundary line of the branch road, is removed from a group of the lane boundary line candidates, and calculates the curvature of the lane boundary line candidate based on an estimated rate of change of the curvature. The device uses a past curvature calculated predetermined-number of images before when the lane boundary line candidate is the lane boundary line of the branch road, and resets the estimated rate of change of the curvature to zero.

An image forming apparatus includes a phase calculation portion, a pattern recognition portion, and a correction coefficient output portion. The phase calculation portion calculates a shift amount of the scanning lines as phase information and, from the phase information, outputs a first set of coefficients. The pattern recognition portion outputs a pattern concordance rate by performing pattern recognition on the group of pixels of interest and peripheral pixels thereof. The correction coefficient output portion outputs a second set of coefficients for correcting the first set of coefficients in accordance with the pattern concordance rate. An interpolation processing portion performs interpolation calculations by referring to the first set of coefficients, the second set of coefficients, and the pattern concordance rate.

An image capturing lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element with negative refractive power has a convex object-side surface and a concave image-side surface. The second lens element with positive refractive power has a concave object-side surface and a convex image-side surface. The third lens element with negative refractive power is made of plastic material, and has a concave image-side surface, wherein an object-side surface and the image-side surface of the third lens element are aspheric. The fourth lens element with positive refractive power is made of plastic material, wherein an object-side surface and an image-side surface of the fourth lens element are aspheric.

In an image forming optical system which includes in order from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power, a refractive index for a d-line of a positive single lens having the largest refractive power among all lenses in the second lens group, is the smallest of a refractive index of lenses in the second lens group.

A ceramic substrate having a defined curvature and a method of its manufacture are described. For this purpose at least two ceramic layers having different defined temperature coefficients of expansion are positioned on top of one another and are permanently bonded together. A curved ceramic substrate may be advantageously utilized in micro-hybrid technology, in multilayer ceramic technology, or in hybrid technology, e.g., as a membrane element of a piezoresistive pressure sensor element.

Provided are a lane separation line detection correcting device / method and an automatic driving system for stabilizing the behavior of a vehicle by correcting overestimated curvature information resulting from an erroneous detection of a curvature of a lane separation line. A travel speed detecting circuit detects, for example, a target travel speed as vehicle sensor information. A maximum curvature estimating circuit estimates, based on the target travel speed, a maximum curvature of a road along which an own vehicle is traveling. A curvature correcting circuit corrects a curvature of a lane separation line input thereto based on the maximum curvature. A control unit controls steering of the own vehicle based on the lane separation line having a corrected curvature. As a result, vehicle steering can be automatically controlled so as to prevent the own vehicle while traveling from departing from a driving lane.

The invention discloses an SLAM system for pipeline detection. The SLAM system comprises a pipeline robot, a controller, a forward-looking laser radar, a pipe diameter measuring device and a mileage wheel, wherein the pipeline robot moves in a pipeline; and the forward-looking laser radar, the pipe diameter measuring device and the mileage wheel are respectively connected with the controller; theforward-looking laser radar is used for detecting information of a front unknown pipe section in the pipeline and transmitting the detected information to the controller to establish a basic model; the pipe diameter measuring device is used for measuring the pipe diameter information of the current position of the pipeline robot and transmitting the measured pipe diameter information to the controller, and the controller optimizes and adjusts the basic model to form a trust model; and the mileage wheel is used for measuring the distance information of the pipeline robot travelling along the central axis of the pipeline and transmitting the measured distance information to the controller, and the controller calculates the pose of the pipeline robot at the moment by combining the distance information and the trust model. The SLAM system for pipeline detection can help to locate the defects of the long-distance oil gas pipeline and model the surveying and mapping of the detected pipeline.

An image capturing lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element with negative refractive power has a convex object-side surface and a concave image-side surface. The second lens element with positive refractive power has a concave object-side surface and a convex image-side surface. The third lens element with negative refractive power is made of plastic material, and has a concave image-side surface, wherein an object-side surface and the image-side surface of the third lens element are aspheric. The fourth lens element with positive refractive power is made of plastic material, wherein an object-side surface and an image-side surface of the fourth lens element are aspheric.

In an image forming optical system which includes in order from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power, a refractive index for a d-line of a positive single lens having the largest refractive power among all lenses in the second lens group, is the smallest of a refractive index of lenses in the second lens group.

The invention discloses hot press molding equipment, which comprises a frame. The equipment is characterized in that the frame is provided with a heating fixing device provided with an upper workbench and a lower workbench, and the opposite faces of the upper and lower workbenches are respectively provided with an upper die and a lower die; the frame is installed with an upper movement mechanism and a lower movement mechanism, the upper movement mechanism passes through the heating fixing device and is in transmission connection with the upper workbench, and the lower movement mechanism passes through the heating fixing device and is in transmission connection with the lower workbench; frame at the side of the lower workbench is provided with an auxiliary workbench which is composed of a left part and a right part; and the lower part of the frame is provided with a controller, the controller is connected with a control panel, and the control panel is provided with a plurality of keys and a current meter and a voltage meter. The hot press molding equipment has the advantages of simple structure, ingenious design, reasonable layout and convenient operation, shortens the processing procedure, ensures no deformation of the sheet material, and can complete the multiple steps in one operating table.

The invention relates to a curvature measuring instrument. The instrument comprises a frame, a slide caliper stand and a slide caliper, wherein the frame comprises two parallel guide rails; the slide caliper stand is connected with the guide rails in a sliding manner; the slide caliper stand is provided with an axial guide slot; the slide caliper is inserted in the guide slot and penetrates through the upper and lower surfaces of the slide caliper stand; the slide caliper and the slide caliper stand are locked by a bolt; and one end of the frame is provided with an inlet / outlet of the slide caliper stand. The instrument can accurately measure the curvature of a baseplate and is convenient to operate.

A therapeutic pillow includes a combination neck and head support pillow designed to support a neutral anatomical position. The pillow includes a fabric pillow cover designed to match a fabric cover surrounding soft fill and defines an outer periphery with a lower edge opposite an upper edge, into a side edges therebetween. A slit extends from a midpoint of the upper edge in parallel to the side edges toward the middle of the pillow and has a length of between about ⅓ of the length of the pillow. The slit defines two identical upper sections in the pillow whose facing edges are positioned adjacent one another, wherein a user may position his or her head in the slit with a lower section of the pillow supporting the user's neck. Item 83 is depicting an inner, zipper adjustable bladder, for the neck support. FIG. 9 shows the bladder in relationship to pillow and where it rests within the base of the pillow to support the neck. FIG. 9 item 82 shows the “T” slit designed to prolong use longevity where he neck rests. Zipper is used to adjust stuffing of pillow and blades entry from bottom. See item 24 in FIG. 3

A zoom lens system having a negative first lens group and a positive second lens group, from an object side, and achieving zooming by varying a group-to-group distance. The second lens group includes a three-element cemented lens which is a set of three lens elements cemented together including, from the object side, a negative first lens, a positive second lens, and a negative third lens, and the three-element cemented lens fulfills conditional formulas 0.08<(rs2+rs1) / (rs2−rs1)<0.5, 27<v2-v1<40, 20<v2-v3<38 (rs1, rs2 represent the curvature radius of the sides of cemented surfaces of the three-element cemented lens on the object side and the image side respectively, and v1-3 represent the Abbe numbers of the first to third lenses of the three-element cemented lens).

A hand-held battery powered tool used for tip shaping and reshaping a tip on a cue stick used for playing pool, billiards, snooker, etc. The tip is shaped by a mounting a rotating concave abrasive adapter that is powered in a hand-held housing that allows a user to center the tip directly into the center of the concave abrasive attachment for precise shaping accuracy in seconds. The abrasiveness of the attachment is equal to 80 grit sand paper, although grits from 60 to 120 grit may also be used. The size of the opening at the front end of the housing also allows a user to angle the cue to shape the side walls of the tip to further correct the curvature of the tip. Finally, a burnisher is also provided at the back of the housing to put a final finish on the tip.

An electrode line, in particular for an implantable electrostimulation device, which is adapted for insertion into body vessels such as heart chambers or blood vessels, comprising electrodes for the stimulation of body tissue, a longitudinal axis and a distal end, wherein there is provided at least one structural element (2) in the region of the distal end, which has an electrostrictive polymer and which can be connected to a voltage source by way of at least one electrical feed line (3) and which is adapted to change its shape when an electrical voltage is applied.

The crown element for securing a packing in a mass transfer column comprises an elongate sheet which comprises a roof element, a wall element and a bottom element. A first bending line is formed between the roof element and the wall element and a second bending line is formed between the wall element and the bottom element. Incisions are formed in the roof element and grooves are formed in the bottom element. The number of incisions is smaller than the number of grooves.

The crown element for securing a packing in a mass transfer column comprises an elongate sheet which comprises a roof element, a wall element and a bottom element. A first bending line is formed between the roof element and the wall element and a second bending line is formed between the wall element and the bottom element. Incisions are formed in the roof element and grooves are formed in the bottom element. The number of incisions is smaller than the number of grooves.

A lane boundary line recognition device detects lane boundary line candidates of a roadway from images captured by an in-vehicle camera, judges that the lane boundary line candidate is a lane boundary line of a branch road, and calculates a curvature of the lane boundary line candidate, and recognizes the lane boundary line based on the calculated curvature. The device removes the lane boundary line candidate, which has been judged as the lane boundary line of the branch road, is removed from a group of the lane boundary line candidates, and calculates the curvature of the lane boundary line candidate based on an estimated rate of change of the curvature. The device uses a past curvature calculated predetermined-number of images before when the lane boundary line candidate is the lane boundary line of the branch road, and resets the estimated rate of change of the curvature to zero.

The present invention relates to a lens curvature variation apparatus using sensed temperature information. The lens curvature variation apparatus according to an embodiment is a lens curvature variation apparatus for varying a curvature of a liquid lens which is variable based on an applied electrical signal and includes a lens driver to apply an electrical signal to the liquid lens, a sensor unit to sense the curvature of the liquid lens formed based on the electrical signal, a temperature sensing unit to sense a temperature of a periphery of the liquid lens, and a controller to control the lens driver to form a target curvature of the liquid lens based on the sensed curvature, wherein the controller controls the lens driver to output a changed electrical signal to the liquid lens to form the target curvature, based on the sensed temperature. Thereby, the curvature of the lens can be sensed quickly and accurately using the sensed temperature information.

The invention discloses a hot press forming equipment, which includes a frame, and is characterized in that: a heating and shaping device is arranged on the frame, and an upper workbench and a lower workbench are arranged in the heating and setting device, and the upper and lower workbenches are opposite to each other. An upper mold and a lower mold are respectively arranged on the surface; an upper movement mechanism and a lower movement mechanism are arranged on the frame, the upper movement mechanism runs through the heating and shaping device and is connected to the upper worktable by transmission, and the lower movement mechanism runs through the heating and shaping device and is connected by transmission. The lower workbench; the frame on the side of the lower workbench is provided with an auxiliary workbench, and the auxiliary workbench is composed of left and right parts; the lower part of the frame is provided with a controller, the controller is connected with a control panel, and on the control panel There are several buttons, ammeters and voltmeters. The invention has the advantages of simple structure, ingenious design, reasonable layout, convenient operation, shortened processing procedure, guarantees that the sheet is not deformed and out of shape, and realizes that multiple technological steps can be completed on the same operation platform.