138results about How to "Eliminate relative rotation" patented technology

The apparatus represents a device having one or two sensors for capturing a single image or two images having the subject's eyes, in which a dimension, such as the horizontal axis, with respect to pixels in the single image or two first images characterizing zero head tilt, and processors in one or more of a housing with the one or two sensors or in a computer system which receives the single image or two images. Such processors determine a head tilt angle between a virtual line extending between the two eyes of the subject in accordance with predefined features, such as pupil or iris center, in the single image or two images and the dimension characterizing zero head tilt, segment left and right iris images from the single image or two images, and rotate the segmented left and right iris image in accordance with the angle to substantially remove head tilt when present. A database of identification data may be provided storing at least templates representative of right and left irises of a plurality of subjects without substantial head tilt, and the processors generate template(s) representative of the left and right irises of the subject, which are either added or compared to the identification data. The processor may also determine interpupillary distance (IPD) or IPD-to-iris ratio using the single image or two images, and as such may be used for comparative searching of the identification data having IPD or IPD-to-iris ratio of the plurality of subjects.

The present invention provides ultrasound imaging catheters, systems and methods for their use which will be particularly useful to monitor the positioning of ablation catheters. In one embodiment, an imaging catheter (10) includes a catheter body (11) having a distal end (12), a proximal end (14) and a longitudinal axis (16). A transducer (20) is rotatably coupled to the distal end. The transducer has an axis of rotation (24) that is at a non-zero angle relative to the catheter body longitudinal axis. Such a configuration provides an exemplary side-looking imaging catheter.

An improved skateboard truck assembly provides very tight, small turning radius capability without the need to lift the forward truck assembly or the entire skateboard from the surface on which it is riding. Turning and riding under all conditions is stable and without wobble. Steering output is adjustable and configurable. The steering assembly uses automotive type mechanisms allowing for caster, camber, pivot and Ackerman steering adjustments.

The present invention discloses a method and device for correction of a panorama video display visual angle. The method comprises: obtaining a panorama video and an attitude angle data sequence corresponding to the panorama video; aiming at the frame panorama images of the panorama video, patching the panorama video to a presetting three-dimensional geometrical feature surface, obtaining a panorama display body, and finding out the attitude angles corresponding to the panorama images from the attitude angle data sequence; and performing rotation of the panorama display body of the panorama images according to the found attitude angles to eliminate the image rotation caused by the shooting shaking. The method and device for correction of the panorama video display visual angle can eliminate the generated frame shaking, jittering or rotation when the panorama video is shot to allow the playing video frame to always keep stable so as to increase viewers' watching experience.

The present invention relates to a system and method for compensating for the effects of birefringence in a given sample and employs an optical birefringence analyzer to sense the real-time birefringence contributions and then provides a feedback signal to a compound electro-optical system that negates the birefringence contributions found in the given sample. The birefringence contribution vanishes, thus significantly reducing the main error component for polarimetric measurements.

The invention provides a feeding distributor with anti-cyclone baffle plate, which comprises an inner muffle, a cover plate, a guide plate and an anti-cyclone baffle plate. Wherein, the guide plate is arranged between the tower wall and the inner muffle; the surface of guide plate that back to the inlet has a strengthen bar; the anti-cyclone baffle plate is arranged at the inner side of inner muffle whose side surface has a tie-bar; another end of tie-bar is fixed on the inner muffle; the cover plate is annular at the top of inner muffle whose one end is fixed on the tower wall and another end is fixed on the inner muffle; the baffle plate is used to resist the revolution of ascending airflow to reduce the entrainment on the liquid and distribute the ascending airflow. The invention has the advantages that: it can eliminate the airflow revolution caused by cyclone material feeding and eliminate the entrainment on the liquid drops, to avoid the non-uniformity of gas caused by the break of flow area and speed.

An expandable interbody spacer for use in spinal fusion procedures includes a plurality of rigid segments connected by flexible connections to form a ring encompassing and defining a hollow central area of variable dimensions. The flexible connections between the plurality of rigid segments may include flexible regions formed between the rigid segments or a continuous flexible member extending along a multisegmented region. The flexible regions formed between the rigid segments may be integrally formed with the rigid segments. One or more of the flexible regions formed between the rigid segments may include a plurality of flexure divisions extending between adjacent rigid segments. One or more of the flexible regions formed between the rigid segments may include a flexure extending between adjacent rigid segments. The rigid segments may include surfaces to limit the range of motion between adjoining rigid segments.

The present invention is turbofan or turbojet assembly for vehicles, craft, aircraft and the like. The assembly includes a plurality of gas turbines, mini-turbines, micro-turbines or nanoturbines disposed in parallel. The turbines form a gondola that is a large, single turbine.

The invention discloses a micro mechanical acceleration sensitive structure for inhibiting crosstalk in a high-precision single-shaft optical micro-accelerometer, and a manufacturing method thereof. The micro mechanical acceleration sensitive structure comprises a bulk silicon sensitive mass block, four symmetrically distributed crab-leg-shaped cantilever beams, a silicon substrate connected with the cantilever beams, and a reflective film plated on the surface of the sensitive mass block. It can be ensured that the gravity center of the sensitive mass block is disposed at a center plane of the cantilever beams through a specially designed microprocessing process, the direction of the sensitive shaft of the single-shaft optical micro-accelerometer is vertical to the center plane, and thus off-axis crosstalk is fundamentally inhibited through adjustment of the position of the gravity center; and the micro mechanical acceleration sensitive structure cooperates with the diffraction grating based optical micro-accelerometer so that the off-axis crosstalk can be effectively inhibited under the condition that the sensitivity of high-acceleration measurement is ensured, the applied surface microprocessing technology can be compatible with an IC technology, and batch manufacture is realized.

A reciprocating saw has a saw blade, a fastening device provided for the saw blade and holding the saw blade in a non-rotating fashion, a reciprocating lifting rod having a free end supporting the fastening device, a locking element provided for axially fixing the saw blade in the fastening device, and having an adjusting spring that acts in a direction of the saw blade, wherein the locking element is movable between a release position and a locked position and holds the saw blade in the locked position in a form-locked fashion.

A hopper car gate for discharging cargo from a hopper car having a length greater than its width. The gate has opposed generally upright side walls and opposed generally upright end walls coupled with the side walls. The coupled walls present a top opening and a bottom opening. A first rail extends between and is coupled with the side walls adjacent the bottom opening. A first door is supported on the first rail and is moveable in a direction that is perpendicular to the length of the hopper car that the gate is joined with between a closed position which blocks the bottom opening and an open position which allows cargo to exit through the bottom opening.

A three-degree-of-freedom integrated stick-slip linear positioning device relates to a positioning device and solves the problems that existing positioning devices are large in size, high in assembling error and low in positioning precision. The Three-degree-of-freedom integrated stick-slip linear positioning device comprises a bearing plate and a cap matched with a driving unit. The cap is fixedly connected to a surface of the bearing plate. The driving unit comprises a first press block, a second press block, an elastic driving base, a piezoelectric ceramic driver, a guide pillar, a contact, a shifting plate, a pretightened press plate and multiple balls, the upper end face of the piezoelectric ceramic driver is connected with the lower end face of the upper elastic plate of the elastic driving base, the lower end face of the piezoelectric ceramic driver is connected with the upper end face of the contact, the lower end face of the contact is connected with the upper end face of the shifting plate, the lower end face of the pretightened press plate is connected with the upper end face of a lower elastic plate of the elastic driving base, and two longitudinal ends of the shifting plate are disposed outside a square cavity of the elastic driving base and detachably connected with a base respectively. The three-degree-of-freedom integrated stick-slip linear positioning device is used for positioning articles.

The present invention provides a wet type multi-plate clutch comprising a first friction engaging element coaxially arranged within a clutch housing, a second friction engaging element alternately disposed with the first friction engaging element and a piston for applying an axial load to engage the first and second friction engaging elements with each other and wherein a projection protruding toward the piston is provided on the clutch housing and a recessed portion is provided in the piston so that a relative rotation between the clutch housing and the piston is prevented by engaging the projection with the recessed portion.

The invention relates to a centrifugal compressor (1) for an exhaust gas turbocharger, in particular an internal combustion engine. The centrifugal compressor has a compressor housing (2) comprising an axial inlet channel (3) and a centrifugal outlet channel (4); with a compressor impeller (6) for circulating and compressing a gas, wherein the compressor impeller (6) has an axial inlet side (7) facing towards an inlet passage (3), a centrifugal outlet side (8) facing an outlet channel (4), and an axial wheel surface contour (9) extending from the inlet side (7) extends up to the outlet side (8); a substantially sleeve-like adapter element (10) which may be axially inserted into an attachment portion (11) disposed at the compressor housing (2); wherein the adapter element (10) comprises, at least in sections, a surface contour (13) which is attached to the axial wheel surface contour (9), such that a gap width (W) between the adapter element (10) and the compressor impeller (6) can be adjusted along mutually facing surface contours (9, 13) through axial movement of the adapter member (10) in a fastening portion (11).

A metallic seal or gasket for use in the joining of cryogenic fluid conduits, the seal or gasket having a generally planar and serpentine periphery defining a central aperture. According to a preferred embodiment, the periphery has at least two opposing elongated serpentine sides and two opposing arcuate ends joining the opposing elongated serpentine sides and is of a hexagonal cross-section.

PROBLEM TO BE SOLVED: To obtain a device and a method for detecting an unbalance of a washing machine which reduce the number of components, simplify the structure and moreover enable stop of the rotation of a washing and dewatering tub corresponding to the amount of the unbalance, only when it is needed.SOLUTION: The washing and dewatering tub provided with a rotating blade at the bottom is disposed rotatably in a water tank 3 suspended and supported swingably in an outer box 1. In the washing machine having this constitution, the device for detecting the unbalance is disposed between the outer box 1 and the water tank 3 and fitted to a unit case 16 of a power supply unit disposed in the outer box 1.

The invention relates to a main shaft end apparatus of a grinding machine, which belongs to the technical field of a machining device. The apparatus comprises a taper body arranged at a main shaft end, a taper sleeve which is used for arranging a grinding wheel and provided with a taper hole in the middle and a screw tooth on the external circumference, and a compression nut. The main shaft end apparatus of the grinding machine is characterized in that the apparatus also comprises a holding disc and a screw; a screw hole is arranged in the middle of the holding disc; a pair of sleeve keys is arranged on the inner end face of the holding disc; a pair of shaft keys is arranged on the outer end face of the holding disc; correspondingly, sleeve key grooves used for the sleeve keys to be inserted are arranged on the outer end face at one side of the holding disc facing to the taper sleeve, and shaft key grooves used for the shaft keys to be inserted are arranged on the outer end face at one side of the holding disc facing to the taper body; after passing through the screw hole in the middle of the holding disc, and the screw is rotationally fixed with the screw hole arranged at the center of the taper hole. The main shaft end apparatus of the grinding machine has the advantages that the grinding wheel on the taper sleeve is ensured to be always in a compressed state, the splashing of abrasive particle is reduced through changing the rotation direction of the main shaft when complex workpieces are processed, thereby improving the working condition.

A fiber optic scanning interferometer in a Michelson arrangement using a polarization splitting coupler is disclosed. The splitting of s and p polarization modes into the fast and slow axes of a birefringent fiber allows the temporal separation of interference phenomena from multiple reflections such that signal recovery is simplified.