212 results about "Rotational component" patented technology

A method for performing radiological-image-guided percutaneous surgery with a system which includes a radiological image generating device for generating an image of a target anatomy of a patient, and a needle insertion mechanism disposed adjacent the image generating device and having a needle adapted to be inserted into the patient. The method includes the steps of: determining a needle trajectory of the needle by positioning the image generating device for aligning, in the image generated by the image generating device, a desired skin insertion site of the patient with a target region of the target anatomy; locking the needle in a direction of the needle trajectory; and repositioning the image generating device to obtain a lateral view of the needle trajectory for viewing an insertion depth and path of the needle during its insertion into the patient. Moreover, a motion transmission mechanism includes an output shaft and an output shaft driver which has two rotational components having respective contact faces between which the output shaft is pressed for frictional engagement therewith. The frictional engagement creates a force between the output shaft and the rotational components which is parallel to the rotational axis of the rotational components for allowing the rotational components to impart a translational motion to the output shaft by virtue of their rotational motion.

A method of estimating three-dimensional camera position information from a series of two-dimensional images that form a panorama employs common features in adjoining image pairs in the series to estimate a transform between the images in the pairs. The common features are subsequently employed to adjust an estimated rotational component of each transform by reducing error between coordinates corresponding to the common features in three-dimensional space in image pairs, on a pair-by-pair basis. A global optimization of the position estimation, used for long sequences of images such as 360 degree panoramas, refines the estimates of the rotational and focal length components of the transforms by concurrently reducing error between all 3D common feature coordinates for all adjoining pairs.

Methods of delivering a pharmaceutical compounds directly to the olfactory epithelium of a mammal by providing a pharmaceutical aerosol suspension comprising an aerosol and the pharmaceutical compound; aerosolizing the suspension to generate a stream of droplets, the stream having a rotational component, and, delivering the droplets directly to the olfactory epithelium, wherein at least 15% of the droplets are delivered directly to the olfactory deposition. The pharmaceutical compound may be encapsulated within a liposome nanoparticle.

A system for enhancing the performance of a carrier insertion sensorless (CIS) position sensing system for a wound field synchronous machine that utilises the positively rotating components (+2ω_ct) of the carrier second harmonic currents that contain rotor position information before field excitation to serve as a north-south pole indicator that determines if the CIS system has locked onto the north or south pole of the rotor.

An engine starting system for a gas turbine engine is provided, the engine starting system comprising: a gas turbine engine including rotational components comprising an engine compressor, an engine turbine, and a rotor shaft operably connecting the engine turbine to the engine compressor, wherein each rotational component is configured to rotate when any one of the rotational components is rotated; an electro-pneumatic starter operably connected to at least one of the rotational components, the electro-pneumatic starter being configured to rotate the rotational components; an electric drive motor operably connected to the electro-pneumatic starter, the electric drive motor being configured to rotate the rotational components through the electro-pneumatic starter; and a motor controller in electronic communication with the electric drive motor, the motor controller being configured to command the electric drive motor to rotate the rotational components at a selected angular velocity for a selected period of time.

An image capture device is disclosed which is equipped with an imaging unit, a first motion detector adapted to detect the rotational component of motion, a second motion detector adapted to detect the translational component of the motion, and an image blur compensation unit adapted to make compensation for image blur on the imaging unit on the basis of output signals of the first and second motion detectors.

A real-time simulation method and system for large deformations is provided. Green's nonlinear strain tensor accurately models large deformations. Modal analysis based on a linear strain tensor has been shown to be suitable for real-time simulation, but is accurate only for moderately small deformations. In the present invention, the rotational component of an infinitesimal deformation is identified, and traditional linear modal analysis is extended to track that component. And the invention develops a procedure to integrate the small rotations occurring at the nodal points. An interesting feature of the formulation is that it can implement both position and orientation constraints in a straightforward manner. These constraints can be used to interactively manipulate the shape of a deformable solid by dragging/twisting a set of nodes. Experiments show that the technique runs in real-time even for a complex model, and that it can simulate large bending and/or twisting deformations with acceptable realism.

An apparatus and method for reaming a bone, facilitating pre-implantation alignment of a prosthesis using trial components, and preparing a bone site for anti-rotational implantation of the prosthesis is provided. The apparatus includes a boring end, a mating end disposed opposite the boring end, and a keying aid disposed between the boring end and mating end. The keying aid facilitates preparation of the bone canal for anti-rotational placement of a prosthesis having an anti-rotational component, or key. The method includes attaching a power tool to the mating end of the apparatus, reaming a bone canal with the boring end of the apparatus, detaching the power tool, attaching a trial component, conducting alignment trials, maintaining the apparatus in the desired position, detaching the trial component, cutting at least one keyway in the bone canal using a cutting device and the keying aid of the apparatus, removing the cutting device, removing the apparatus from the reamed bone canal, and inserting the prosthesis into anti-rotational engagement with the reamed bone by aligning the key on the prosthesis with the keyway in the bone canal.

The invention provides an electronic image stabilization method based on inertial navigation information. The method comprises the following steps that: firstly, feature points of each image of a video are extracted, subsequently the overall motion estimation is carried out on two adjacent frames by using a feature point matching algorithm; if the overall motion estimation has larger errors, the overall motion is estimated by using motion information obtained by an inertial navigation system so as to compensate the errors caused by the fact that the overall motion is estimated by merely using an image; the overall motion estimation adopts an affine transformation model; then motion filtering is carried out on the model in combination with the image and the inertial navigation information so as to distinguish the active motion and a trembling component of a camera; and moreover, a rotational component introduced because of the trembling is determined; and furthermore an original video image is compensated by using the obtained trembling and rotational components so as to obtain a stable video; and the image restoration treatment is carried out on each frame of image of the video in combination with the image information and the inertial navigation prediction motion information. The method needs no complex hardware and is good in electronic image stabilization; and the calculation precision is improved.

The mosaicing curling effect which causes a mosaic strip to curl is effectively mitigated in a system for generating a mosaic image from sequential images which partially overlap with one another. The system has a matrix estimating unit, an adjustment element calculating unit, and an image projecting unit. The matrix estimating unit estimates a transformation matrix for transformation between two adjacent images taken out from among the sequential images. The adjustment element calculating unit calculates an adjustment element of the estimated transformation matrix by decomposing the transformation matrix into a rotational component and a perspective component. The image projecting unit projects each image on the mosaic plane using the transformation matrix to which the calculated adjustment element has been applied.

The invention provides a detection method and device of drop information. The detection method of the drop information comprises the following steps: acquiring the accelerated speed of a terminal, and detecting whether the acceleration is equal to a preset acceleration; acquiring the acceleration component before the current moment when detecting that the acceleration equals to the preset acceleration; acquiring the rotational component of the terminal before the current moment when detecting that the preset data transmission module has no data to upload; and determining the drop information according to the acceleration component and the rotational component. Since the final landing direction, angle and position can be acquired according to the acceleration component before the drop and the direction or angle change value in the drop process, the detection accuracy is improved.

The invention discloses a rotor system fault diagnosis method and device based on vibration analysis. A sensor acquires normal conditions of a rotor system and vibration signals under fault conditions; the acquired vibration signals are decomposed by an improved inherent time scale decomposition method to generate a plurality of rotational components and residual signals; related rotational components capable of reflecting fault information are selected from the rotational components; energy of each related rotational component is calculated; related vector machine multi-classification models are built by an improved directed acyclic method; fault characteristics are inputted to the related vector machine multi-classification models for training and fault diagnosis. A motor, a first bearing block, a second bearing block and a third bearing block are arranged on a test bed base, the first bearing block, the second bearing block and the third bearing block respectively support a first rotating shaft and a second rotating shaft which are sequentially connected with an output shaft of the motor, both the first rotating shaft and the second rotating shaft are provided with a disk, and a sensor group is arranged at the end of the second rotating shaft. Rotor system fault types can be rapidly and accurately recognized, and the method and the device are applicable to online diagnosis of the rotor system.

The invention provides a method for recognizing and separating magnetotelluric signal and noise. Firstly, a magnetotelluric signal collected in a strong electromagnetic interference environment is equidistantly segmented, by optimizing inherent time-scale decomposition, each magnetotelluric signal segment is subjected to adaptive decomposition to obtain a rotational component, and a sample entropyand a fuzzy entropy of the rotational component are extracted. Then, the sample entropy and the fuzzy entropy are taken as joint feature parameters to carry out fuzzy C-means clustering, according tothe feature parameters and a clustering method, a measured magnetotelluric signal sequence is divided into two kinds including a useful signal and a strong interference signal. Finally, only a magnetotelluric signal segment which is recognized as the strong interference signal is subjected to noise suppression processing by using a wavelet threshold, and a reconstructed magnetotelluric signal isobtained after superposition. The method has high reliability.

A planetary reduction mechanism includes a ring member and a planetary rotary member internally meshing with the internal gear, and a pin. The pin extends through the planetary rotary member for preventing orbital motion or rotation of the planetary rotary member, or for taking out an orbital motion component or a rotational component thereof. A continuous groove is formed on an outer circumference of the pin.

An improved axial gas bearing for a gas-driven NMR MAS sample rotor is disclosed that utilizes inward flow with a low rotational component over a rotor conical end. A conical flow region is formed between the rotor conical end and a conical stator bearing surface such that the included angle defining the stator surface is not less than the included angle defining the rotor conical end. Gas is injected radially inward with a significant axial rearward component from a number of small holes at high velocity from the periphery into the conical flow region. Compared to the radial velocity components, the tangential flow components of the injected gas are small and preferably opposed to the direction of the rotor rotation. The high and accelerating negative radial velocities may result in significant Bernoulli effect, such that the mean axial pressure over the conical rotor end may be less than atmospheric pressure for a given axial clearance, but as the clearance decreases, the hydrostatic effects exceed the Bernoulli effects and the mean axial pressure over the conical rotor end may then exceed atmospheric pressure by a substantial amount. Thus, a self-stabilizing axial bearing is formed with improved stability and stiffness for rotor surface speeds up to at least 80% of the speed of sound. Motive power required to spin the rotor may be provided by a radial-inflow microturbine at the opposite end of the rotor in a way that is readily compatible with automatic sample change.