388 results about "Circular orbit" patented technology

A read/write head includes a slider provided with an electromagnetic transducer element (or an optical module), an actuator, and a suspension. The actuator includes a fixed part, a movable part, and at least two beam members for coupling them together. The beam members have a displacement generating means that elongates and contracts by inverse piezoelectric effect or electrostrictive effect. The fixed part is fixed to the suspension, and the movable part is fixed to the slider. Upon the elongation and contraction of the displacement generator, the displacement generator deflects and the movable part displaces linearly, circularly or rotationally with respect to the fixed part, and the electromagnetic transducer element displaces in a linear or circular orbit, so that the electromagnetic transducer element intersects recording tracks. In the actuator, the fixed part, movable part and beam members are formed as an integrated single piece by providing a hole and/or a cutout in a sheet-like member constructed of a piezoelectric or electrostrictive material. The actuator of the structure illustrated is used for the positioning of a direction intersecting recording tracks. In this case, the total sum of voltages applied on the displacement generating means is controlled in such a manner that it is constant at any time, thereby controlling position fluctuations of the electromagnetic transducer element in the direction vertical to the recording medium surface.

A method of and system for performing intravenous tomographic digital angiography imaging which combines the principles of intravenous digital angiography with those of cone-beam volume tomography for generating a direct, unambiguous and accurate 3-D reconstruction of stenosis and other irregularities and malformations from 2-D cone-beam tomography projections is disclosed in which several different data acquisition geometries, such as a circle-plus-arc data acquisition geometry, may be utilized to provide a complete set of data so that an exact 3-D reconstruction is obtained. Only a single IV contrast injection with a short breathhold by the patient is needed for use with a volume CT scanner which uses a cone-beam x-ray source and a 2-D detector for fast volume scanning in order to provide true 3-D descriptions of vascular anatomy with more than 0.5 lp/mm isotropic resolution in the x, y and z directions is utilized in which one set of cone-beam projections is acquired while rotating the x-ray tube and detector on the CT gantry and then another set of projections is acquired while tilting the gantry by a small angle. The projection data is preweighted and the partial derivatives of the preweighted projection data are calculated. Those calculated partial derivatives are rebinned to the first derivative of the Radon transform, for both the circular orbit data and the arc orbit data. The second partial derivative of the Radon transform is then calculated and then the reconstructed 3-D images are obtained by backprojecting using the inverse Radon transform.

In an implementation of disc media marking, a laser renders an image on a disc media as laser marks written in concentric circular tracks. A print control application determines a radius of a first circular track such that a circumferential length of the first circular track corresponds to an integral number of laser mark spaces. The print control application further determines a radial increment from the first circular track to a second circular track such that a circumferential length of the second circular track corresponds to a second integral number of the laser mark spaces.

The invention discloses a suspended orbit type multi-arm casting robot which comprises a running gear, a slewing gear, a lifting gear, a working-arm mounting seat, a first working arm, a second working arm, a third working arm, a fourth working arm and a circular orbit. Cleaning tools of a pneumatic finger, a polisher, a pneumatic pick, a plasma cutter and the like are arranged on an end executor of each of the four working arms. The running gear adopts four-point suspension, long-distance steady movement of a robot can be realized, the four working arms can be operated in a joint manner, the four pneumatic fingers and the four cleaning tools can be converted flexibly, multi-tool synchronization operation can be realized, requirements on cleaning operations of recognizing, transporting, overturning, attitude adjusting, cleaning, cutting, polishing and the like of castings with heavy weight, bulk mass and complex shape can be met, efficiency and quality of casting cleaning operation are improved, and labor intensity and production cost of operating personnel are lowered.

The 3D CT imaging method for large view field comprises: (1) taking first single-circular orbit cone-beam CT scanning to obtain the first digital ray projection image sequence; (2) removing the platform vertical the main ray with some distance to take the second CT scanning and obtain the second image sequence; (3) correcting former two images for dark current and inconsistency; (4) recording distance from ray source to detector, former moved distance and detector level channel number; (5) with the projection rearrangement algorithm in this invention, rearranging former two images into self-contained quasi-parallel image sequence; (6) with the quasi-parallel ray reconstructing algorithm in this invention, reconstructing the 3D CT image. This invention can enlarge the view area more than 3 times with high efficiency.

In an X-ray CT imaging, an X-ray generator (11) and a two-dimensional X-ray detector (21) are opposed to each other between an object and are rotated by a rotary shaft (32) around the object. At least one of the rotary shaft supporter (61) and an object holder (40) includes a movement mechanism (42, 65) for moving a supporter (30) for the X-ray generator and the X-ray detector relative to the object. In offset scan CT imaging, the rotation of the supporter by the rotary shaft is performed simultaneously with the relative two-dimensional movement of the rotary shaft by the movement mechanism. In the relative two-dimensional movement, the position of the rotary shaft is moved according to the rotary angle of the supporter along a circular orbit around the center of a CT imaging region in a plane crossing the rotary shaft. Thus, it becomes possible to image a larger region of interest of the object.

A shaker movement permits an arbitrary path of motion in a shaker's shaking action. The shaker movement comprises independent control over the "X" and "Y" directions of the shaking actions by a pair of track assemblies, each track assembly comprising a pair of fixed rods and a pair of sliding rods that are interconnected with each other in a rectangular, grid-like pattern. Motion in both directions can be driven by a single motor utilizing independent pulley-and-belt systems or by two synchronized motors which are connected to a sliding rod of each track assembly. By altering the relative amplitude, phase angle, and frequency between the "X" and "Y" directions, the shaking action can follow a desired path. The shaker path can be varied from the traditional circular orbital motion or linear motion, to a new group of shaking patterns in which the direction of the shaking movement can reverse. The new patterns of shaker movement cause the liquid being shaken to be more thoroughly mixed, with less power input, and at a lower angular frequency than is practical with traditional paths of motion. This results in higher rates of gas transfer to and from the liquid, resulting in greater growth of a bacterial culture, and for higher rates of mass transfer at equivalent levels of energy input.

An apparatus is provided to enter operational information to an objective device based on a motion of an operator's hand. In the apparatus, an imaging device acquires image data of the operator's hand and an extracting unit extracts characteristic points of the motion of the hand in a spatial coordinate system of the image data by applying processing to the image data. A detecting unit detects, as extreme-value information, extreme-value points appearing in spatial coordinates of the characteristic points and detection time instants at which the extreme-value points appear. A memory device is used to memorize the extreme-value information. An orbit determining unit determines whether or not four or more consecutive pieces of the extreme-value information corresponding to desired operational information comply with a predetermined circular-orbit condition and an outputting unit outputs the desired operational information to the device depending on a result determined by the orbit determining unit.

A non-circular-orbit detection method and apparatus is disclosed. In some embodiments, the method includes: locating first and second detectors, displaced with respect to one another, a distance from a patient; moving the first and second detectors in a direction towards the patient until a first sensor senses a first point of the patient at a first sensing position; moving the first and second detectors in a second direction from the first sensing position until a second sensor senses a second point of the patient at a second sensing position; and moving the first and second detectors in a non-circular-orbit around the patient. Preferably, the method includes determining the non-circular-orbit based on, among other things, locations of the first point and the second point.

The invention discloses a device and method for detecting an operation state of an ultra-high-voltage transformer in a transformer substation based on a 3D infrared panoramic image, and aims to solve the problem that only parts of infrared thermal images of the transformer can be simultaneously obtained and a global temperature distribution thermal image of the transformer cannot be obtained when the operation state of the ultra-high-voltage transformer is detected traditionally. The device comprises a circular orbit paved around the transformer; the central axis of the transformer passes through the circle centre of the circular orbit; an intelligent controllable trolley is arranged on the circular orbit; a camera is arranged on the intelligent controllable trolley through a bracket; the camera comprises an infrared camera and a visible light camera; a panoramic fused image is formed by utilizing an image fusion technology; 3D left and right eye images are generated; recoding is carried out; and finally, the image is output onto a touch monitoring screen. According to the invention, the real-time operation state of the transformer can be reflected vividly; the operation state of the transformer can be observed without a dead angle from different angles; and operation faults can be judged in time.

The invention relates to a geometry correction method of an X-ray computed tomography imaging system, which is especially suitable for geometry parameter correction of pencil beam and fan beam computed tomography imaging systems of a circular orbit. Horizontal offset of an X-ray detector is accurately estimated by using X-ray detector offset information of the computed tomography imaging system, included in linear mold X-ray computed tomography imaging three-dimensional reconstruction data; and the geometry correction of the X-ray computed tomography imaging system can be carried out by using the obtained horizontal offset, thereby improving the spatial resolution of the X-ray computed tomography imaging system and reducing the image artifacts.

The invention relates a method and a device for testing the rotation state of a rotating shaft. The device comprises a fixed disc, a rotating disc, Hall switches, magnetic elements and the like; n Hall switches and n+1 magnetic elements are respectively and uniformly distributed on circular orbits on the fixed disc and the rotating disc; a stator is fixedly connected with the fixed disc, the rotating shaft and the rotating disc respectively; the rotating shaft penetrates through circular holes in the fixed disc and the rotating disc. When the rotating shaft rotates for a 360/(n*(n+1)) angle each time relative to the stator, only one Hall switch in the n Hall switches is over against the magnetic elements so as to generate an impulse hop. State information, such as the rotating angle, the number of turns and the direction of the rotating shaft can be detected through correlation calculation by counting impulses generated by the Hall switches. According to the device and the method for detecting the rotation state of the rotating shaft, the rotation state of the rotating shaft can be obtained under a non-contact condition, the state information of the rotating shaft can be obtained in the rotation state measurement and application having lower requirement on precision, and thus the device is small in size, simple in structure and easy to mount.

An apparatus for damping torsional vibration in a shaft, having a plurality of retainer pockets spaced from each other in the direction of the shaft's axis of rotation and connected for contemporaneous rotation with the shaft, and a plurality of disks each disposed within one of the retainer pockets, each retainer pocket having a circular track wall, each disk being free to shift perpendicular to the shaft's axis of rotation to engage and move along the circular track wall in response to the vibration, wherein each circular retainer pocket has a center that is at a predetermined radial offset distance relative to the shaft's axis of rotation and the respective radial offsets are angularly spaced from each other about the shaft's axis of rotation.

The invention relates to a laser cutting carrier which comprises a laser cutting machine, wherein the laser cutting machine is arranged on a circular orbit; an assembly fixture is arranged at the center of the circular orbit; the laser cutting machine can rotate for 360 degrees around the assembly fixture along the circular orbit. The laser cutting carrier is effectively applied to the cutting of polyhedral profiles.