160results about How to "Smooth curve" patented technology

An ultrasound inspection apparatus detachably connected to an endoscope comprises an ultrasonic scanning portion in the front-end side having an ultrasound transducer for performing ultrasonic scanning by arranging a number of transducer chips in a rectangular arrangement. The ultrasonic scanning portion is detachably attached to a distal end portion of an insertion unit in the endoscope so as to protrude ahead the distal end portion by a predetermined length. In order to hold the ultrasonic scanning portion in a fixed state, an endoscope-placing portion for placing the distal end portion is connected to the base end of the ultrasonic scanning portion, and an endoscope-fixing portion for detachably fixing the distal end portion thereto is arranged with the endoscope-placing portion. A predetermined number of wires connected to each transducer chip is inserted into a signal cable from a base end position of the endoscope-placing portion so as to bundle the wires.

A bottle-shaped can manufacturing method for forming a shoulder portion having a slope and a diametrically small cylindrical neck portion integrally by further working a bottom side of a bottomed cylindrical can which is formed thinner at its trunk wall than at its bottom wall by drawing a metallic sheet having a thickness of 0.1 to 0.4 mm and by executing at least one thinning working of a bending / extending working and an ironing working.

A cutter for a drill bit used in a geological formation includes a shaped ultra hard working surface. The cutter with the shaped working surface is mounted on a drill bit to provide desired cutting characteristics. The shaped working surface provides varied cutting characteristics depending upon the shape, and the characteristics can vary depending upon the depth of the cut.

A fixation implant generally includes at least one shaft configured to securely fit into a hole formed in bone. The shaft is of sufficient length relative to the interior diameter of the hole and, in some preferred embodiments, has locking protuberances, like threads, ridges, or barbs, that resist removal of the shaft from the hole in the bone when different types of forces, such as tensile or bending forces, are applied to the implant. The shaft is generally cylindrical in shape, however, in various embodiments, different cross-sections could be used. In a preferred embodiment the implant has a flattened and bent end portion emerging from only one side of the shaft. At the other side of the implant the outer surface of the shaft and the emerging end portion form a smooth surface, without any projections. This smooth surface at the end of the implant prevents irritation of the surrounding tissue. The end portion has a mating surface configured to grip a portion of the soft tissue surrounding the hole between the bone and the mating surface. The longitudinal axis of the shaft is oriented at an angle of less than 90 degrees relative to the mating surface. In this fashion, the implant anchors soft tissue, such as rotator cuff tissue, to bone.

Apparatus and method for electronically estimating focusing distance between a camera (still and / or video camera) and a subject. Images at different focal positions of a calibration target are collected with distances between subject positions. In one aspect, histogram matching is performed to reduce noise error. A focus matching model is then generated in response to detected blur differences between successive images of the calibration target. The focus matching model is preferably converted to a polynomial equation of a desired order to smooth out image collection noise. The focus matching model is stored for access during operation. In use, the distance to subject is estimated in response to capturing images, detecting blur differences between the images and entering the blur difference information into the matching model.

A rotor assembly includes a motor, a propeller, and a connection assembly. The motor includes a stator and a rotator rotatable with respect to the stator. The connection assembly includes a locking member provided between the propeller and the rotator. The locking member is configured to rotate with respect to the rotator and the propeller to lock the propeller to the motor.

This invention relates in general to a bioabsorbable surgical tissue fixation implant (nail) and, more particularly to an implant for the fixation of soft tissue to bone. In one embodiment of the invention, the fixation implant generally includes at least one shaft configured to securely fit into a hole formed in bone. The shaft is of sufficient length relative to the interior diameter of the hole and, in some preferred embodiments, has locking protuberances, like threads, ridges, or barbs, that resist removal of the shaft from the hole in the bone when different types of forces, such as tensile or bending forces, are applied to the implant. The shaft is generally cylindrical in shape, however, in various embodiments of the invention, different cross-sections could be used. In a preferred embodiment of the present invention, the implant has a flattened and bent end portion emerging from only one side of the shaft. At the other side of the implant the outer surface of the shaft and the emerging end portion form a smooth surface, without any projections. This smooth surface at the end of the implant prevents irritation of the surrounding tissue. The end portion has a mating surface configured to grip a portion of the soft tissue surrounding the hole between the bone and the mating surface. The longitudinal axis of the shaft is oriented at an angle of less than 90 degrees relative to the mating surface. In this fashion, the implant anchors soft tissue, such as rotator cuff tissue, to bone.

A method for determining an estimate of the mass of a motor vehicle for use in controlling the brake system of a motor vehicle, in which a driving force and a force of inertia acting instantaneously on the wheel being determined for all the wheels of the vehicle, and the instantaneous driving forces and inertia forces of all wheels as well as an instantaneous wind resistance of the motor vehicle are added up and divided by the instantaneous longitudinal acceleration of the vehicle to determine the estimate of the mass. In addition, the rolling resistance of the vehicle and / or a braking force acting instantaneously on the wheel is determined for all the wheels and taken into account in the addition.

The invention discloses a robot trajectory planning method based on a genetic chaos optimization algorithm. The method comprises the following steps: performing interpolation in a starting point and an ending point in Cartesian space to obtain a series of middle position points; establishing a D-H parametric model and solving angle values of joints of a robot corresponding to the position points in joint space; initializing a time interval sequence between every two nodes in the joint space; constructing values of angles passed by polynomial interpolation joint space and controlling themotion form of each joint; constructing a time optimal fitness function, optimizing the time interval sequences with the robot trajectory planning method based on the genetic chaos optimization algorithm until end conditions are met, and outputting the optimal time interval sequence; planning a motion trajectory and finishing set motion. With adoption of the method, the optimal running time of the robot can be obtained, the working efficiency of the robot is increased, curves of the motion trajectory, speed and acceleration are smooth without sudden change, and the service life of the robot is prolonged.

Vibrating dental devices and accessories are provided, including a unique snap fit dental plate and vibrator connection; risers for adjusting the thickness of a dental plate; a pointer or wand that can be clamped onto a dental plate to reach even severely misaligned teeth; a cushioned dental plate having a non-Newtonian fluid therein that allows conformation of the cushion to the dentition, but hardens on use to allow the transmission of vibration to the teeth. Accessories such as carrying cases and docking stations are also provided.

The invention discloses a special aluminum square tube ceiling and a construction method thereof. The special aluminum square tube ceiling comprises a hanging steel bar keel hung under a concrete top plate, a cross-bracing keel and an aluminum square tube ceiling connected at the lower end of the cross-bracing keel, wherein the aluminum square tube ceiling is formed by the spaced distribution of a plurality of aluminum square tubes with U-shaped sections; the hanging steel bar keel is an unequal-length keel; the aluminum square tube ceiling presents the shape of a curved surface; two continuous aluminum square tubes are butt-jointed by a woody connection fitting, the two ends of the woody connection fitting are respectively embedded in U-shaped spaces of the aluminum square tubes, and the two U-shaped edges of the aluminum square tubes are extended to form bent edges which are symmetrical inwards and are covered on the two upper edges of the woody connection fitting. With the advantages of simple structure, labor / time saving, quick construction, low cost, accurate ceiling shape positioning and smooth curve, the invention is applicable to the building ceilings in various curved shapes.

A low noise method and apparatus with the apparatus including a hood for mounting over an exhaust outlet duct to capture a fluid stream and then redirect the fluid stream to a fluid outlet in the hood through the use of smoothly curving duct that maintains the fluid flowing therethrough in a laminar flow condition with the inlet and outlet positioned such that there is no line of sight between the exhaust outlet duct and the fluid outlet duct in the hood.

A fluorescent material for a scintillator to be used in a radiation detector is provided. The fluorescent material is designed to have a high fluorescent intensity and a low level of afterglow a short term of 1 to 300 ms after the termination of X-ray radiation.The above fluorescent material contains Ce as an activator. In addition, the material must contain at least Gd, Al, Ga, O, Fe, and a component M. The component M is at least one of Mg, Ti, and Ni. In addition, the composition of the material must be expressed by the general formula:(Gd1-x-zLuxCez)3+a(Al1-u-sGauScs)5−aO12 wherein 0≦a≦0.15, 0≦x≦0.5, 0.0003≦z≦0.0167, 0.2≦u≦0.6, and 0≦s≦0.1, and wherein, regarding the concentrations of Fe and M, Fe: 0.05≦Fe concentration (mass ppm)≦1, and 0≦M concentration (mass ppm)≦50.

A flexible, expandable stent assembly comprised of a generally cylindrically shaped channel, having a longitudinal axis, and having a plurality of openings therein. The openings are defined by longitudinally aligned circumferential arrays of generally “hairpin-like curved web arrays or bends of metal, creating a plurality of circumferentially disposed “Palm Tree” shaped annular spaces between longitudinally adjacent web arrays.

The invention relates to a medium wave infrared continuous zooming optical system with high zoom ratio, belongs to the technical field of optic lens, and aims to solve the existent problems of long zooming stroke, large F value and more lens in the prior art. The system comprises a front fixing group, a lens A of a time changing group, a lens C of a compensation group, a lens B of the time changing group, a lens D of the compensation group, a back fixing group, a secondary image formation group and a probe, coaxially arranged from left to right in sequence, wherein the continuous zooming of the system is realized through the axial movement of the time changing group and the compensation group. Through adopting the structure that the lens A and the lens B of the time changing group and the lens C and the lens D of the compensation group are arranged in a crossing manner to move, the continuous zooming is realized, the zooming stroke is short, the curve is smooth, 100% cold light stop efficiency is satisfied, the F value is constant to be 2, the continuous zooming can be carried out within the range of 10 mm to 300 mm of focal distance, and the image formation quality is sound in the whole focal distance range.

The invention relates to a method for textile production. The method for producing an energy-saving environment-friendly soft paint printing fleece comprises the following steps: step one: destarch, refining and bleaching; step two: whitening, softening and carding; step three: performing treatment before printing by water washing or mercerization; step four, printing: firstly, preparing a color slurry mixed solution and performing printing through a circular screen printer with the drying temperature of lower than 120 DEG C, the vehicle speed of between 30 and 35 m / min, the roasting temperature of 150 DEG C, and the roasting time of between 3 and 5 minutes; and step five, afterfinishing.. A color slurry aqueous solution for pigment printing has the following formula: the viscosity of the prepared color slurry is between 50 and 80 dPa.S; printing paint is between 0.01 and 8 percent; an adhesive for pigment printing is between 8 and 20 percent; a thickening agent for pigment printing is between 3 and 6 percent. Compared with dye printing, the pigment printing has the advantages of simple process, short process course, convenient color match of products, small pollution, low cost and the like.

A clock generator circuit, comprising: a multi-phase clock signal generator for generating a plurality of clock signals having a same frequency but difference phases according to a reference clock signal; a modulation device for generating a phase modulation signal through Delta-Sigma modulation; and a phase modulator, which is electrically coupled to the modulation device, for selecting one of the clock signals to be a modulated clock signal according to the phase modulation signal.

A manufacturing method for a silicon carbide semiconductor device is disclosed. It includes an etching method in which an Al film and Ni film are laid on an SiC wafer in this order and wet-etched, whereby a two-layer etching mask is formed in which Ni film portions overhang Al film portions. Mesa grooves are formed by dry etching by using this etching mask.

A method for determining an estimate of the mass of a motor vehicle for use in controlling the brake system of a motor vehicle, in which a driving force and a force of inertia acting instantaneously on the wheel being determined for all the wheels of the vehicle, and the instantaneous driving forces and inertia forces of all wheels as well as an instantaneous wind resistance of the motor vehicle are added up and divided by the instantaneous longitudinal acceleration of the vehicle to determine the estimate of the mass. In addition, the rolling resistance of the vehicle and / or a braking force acting instantaneously on the wheel is determined for all the wheels and taken into account in the addition.

A novel latch seat for a switching rocker arm assembly used in variable valve actuation (VVA) systems for internal combustion engines. The seat is formed interactively in the assembled switching rocker arm using a novel fixture and press. The press interactively creates a curved dimple of the correct curvature, position and depth while measuring several lash dimensions. Since the latch seat is formed on the assembled rocker arm assembly, the latch seat depth is designed to account for the inaccuracies in the rocker arm assembly parts which create lash. Therefore all of the parts may be made with less precision since the latch seat is sized to compensate for the inaccuracies of all of the parts. The rocker arm assembly parts now may be manufactured to less stringent standards, but result in a rocker arm assembly with same accuracy of rocker arm assemblies manufactured to previous standards.

The invention relates to a dynamic local path planning method which comprises the following steps: obtaining a starting pose and an ending pose of a moving body, updating a cost map in real time, judging that a planned path is a few-order path, and representing the planned path through a mathematical expression; discretizing the planned path represented by the mathematical expression to obtain discrete path points, converting the discrete path points into grid coordinates, judging whether the planned path is an infeasible region or not according to the grid coordinates, if the planned path isthe infeasible region, abandoning the planned path, and otherwise, taking the planned path as a possible path; and evaluating all possible paths through an evaluation function, and selecting the pathwith the highest score to carry out smoothing processing. The invention also relates to a dynamic local path planning system. According to the invention, the planned path curvature is continuous, thecurve is smooth, and the motion characteristics of mobile equipment such as robots or AGVs are met.

The invention discloses a PMSM sensor-less sliding mode control system and method. The rotor position and a speed of the PMSM are estimated through employing a novel sliding mode observer, and a sliding mode controller based on a novel approach law is employed at a rotating speed controller. Sliding mode control has relatively good robustness, the structure is simple, and engineering realization is easy. The time of the system approaching the sliding mode surface is shortened through the sliding mode controller based on the novel approach law, and a system response speed and dynamic performance are improved. A rotor position sensor is replaced by the sliding mode observer to estimate the rotor position and a speed signal, cost is substantially reduced, and system stability is improved. A power series saturation function is utilized to replace a sign function in the sliding mode control law, and system buffeting existing in a traditional sliding mode observer is effectively reduced.

A conventional funnel that has a rimmed open bowl atop a spout, to guide a fluid flow poured in from a fluid-contributing source or container into a fluid-receiving container, is improved by the provision of a curved-in lip around the bowl rim. The curved-in lip intercepts any fluid seeking to splash out of the funnel for a variety of reasons, and redirects it back into the bowl to counter undesirable splash-out. The curved-in rim, even when of very small span, is effective in countering splash-out of true liquids, mixtures of non-sticking solid particulates in a liquid, dry flowing particulates and even small sized objects like peanuts. The provision of a perforated collar at the junction of the bowl and the spout, a flexible portion provided to the spout adjacent the same junction, and a plurality of outwardly extending vanes provided outside the spout, and flutes formed in the bowl to promote Coriolis-acceleration-influenced flow, added individually or in selected combinations, variously improve the funnel further by making it more securely locatable with respect to the receiving container, facilitating venting of displaced air therefrom, and promoting fluid throughflow via the funnel.

The present disclosure relates to a fabric filter system, which may be used for removing particulate matter from a gas, such as a combustion process gas. The filter system includes a fabric filter (3) which is placed in a filter compartment. From the filter, gas flows via a filter plenary space (5) to an outlet duct (7), where the gas exits. A flow control device controls the amount of air exiting through the outlet duct. The flow control device comprises a louver-type damper (17). This provides reliable and efficient control of the gas flow. A collar (21), connecting the plenary space (5) with the outlet duct (7), improves the gas flow into the duct.