326 results about "Independent motion" patented technology

A transmission line for downhole tools that make up all or part of a tool string for drilling and production of oil, gas, and geothermal wells that can withstand the dynamic gravitational forces and other accelerations associated with downhole excavations. The transmission line comprises a metal tube, or outer conductor, that houses a coaxial wire inner conductor. A non-metallic dielectric material is interposed between the inner and outer conductors. The outer and inner conductors and the dielectric are sufficiently compressed together so that independent motion between them is abated. Compression of the components of the transmission line may be achieved by drawing the transmission through one or more dies in order to draw down the outer conductor onto the dielectric, or by expanding the inner conductor against the dielectric using a mandrel or hydraulic pressure. Non-metallic bead segments may be used in aid of the compression necessary to resist the dynamic forces and accelerations of drilling.

The present invention features a qualitative method to detect independent motion revealed in successive frames of a compressed surveillance MPEG video stream using linear system consistency analysis without decompression of the stream, identifying the segments containing independent motion in a real-time or faster manner, for the retrieval of these segments. The linear system is constructed using the macroblocks of MPEG compressed video frames. The normal flow value of the macroblock is obtained by taking the dot product between the macroblock gradient vector, computed by averaging the four block gradient vectors, and the motion vector of this macroblock. The normal flow value is filtered for inclusion in the linear system, and the statistic of the matrices of the resulting linear system is determined, filtered to screen out false negatives and outliers, and used to determine the presence or absence of independent motion.

The present invention provides a two-part robotic device for positioning of a hand tool, comprising: a. a fixed base unit constantly fix to its position; b. a detachable body unit reversibly coupled to said fixed base unit, coupled to said current medical instrument; wherein said fixed base unit is adapted to provide independent movement to said hand tool, said independent movement selected from the group consisting of rotation and translation, and further wherein said detachable body unit is removable and replaceable from said fixed base unit such that upon exchange of said hand tool for a second hand tool, said second hand tool is placed in substantially the same location as the location of said hand tool prior to said exchange.

The invention is suitable to the independent motion vehicles environment sensation monocular visual navigation method, first surveys the camera distortion parameter, puts the camera on the independent motion vehicles, determines transformation relation from image plane coordinate system to world coordinate system; then records current car body posture, gathers the picture in the current car body visible scope, feedback the picture to the picture operation contact surface in order to definite the walk mode of the car body and do distortion correction on the gathering picture, select the path and the path spot on the path, according to the coordinates transformation relations under the world coordinate system put the current position and choice path result to the car body and demonstrate on the graph operation contact surface by the car body width; the car body walks according to the independently evades bonds or the way track way till the current visible scope last way spot, and then circling start from the gather picture to the final object point. The invention applies the monocular measuring technique in the unknown environment the visual navigation.

A mirror or other reflecting surface is used for collecting and reflecting incident solar radiation. The mirror is supported for independent motion about a pair of axes. An accelerometer generates signals representative of an amount and direction of motion of the mirror about each of the axes. Motors or other drive mechanisms independently drive the mirror about each of the axes. A tracking device provides information about the current position of the Sun. A control is connected to the accelerometer, the motors and the tracking device for maintaining a predetermined optimum orientation of the mirror as the Sun moves across the sky.

The invention relates to an elevator system in tall buildings, the system having at least one first elevator shaft, which houses an elevator arranged to stop at floors called transfer levels, and at least one second elevator shaft, which houses elevators whose elevator cars are disposed one above the other in the elevator shaft, which elevator cars are designed to stop during their travel at any floor to which or from which a call has been issued. The second elevator shaft is divided vertically into local shafts situated one above the other, the number of which is at least one for each zone between transfer levels.

Target joint support moments of each leg are determined by estimating joint moments of the each leg necessary for the person A wearing a leg motion support orthosis (1) to make a motion independently and according to the estimated joint moments. Moreover, floor reaction forces for the support orthosis (1) to make a motion independently are estimated, and then estimated values of actual joint support moments actually applied from the support orthosis (1) to the joints of the each leg of the person (A) are found by using the estimated floor reaction forces and outputs of the force sensor (22) provided in a leg link portion (4) of the support orthosis (1). Torque generation units (15) and (16) of the support orthosis (1) are controlled in such a way that the estimated values of the actual joint support moments are coincident with the target joint support moments. Thereby, the leg motion of the person can be supported. Moreover, it effectively prevents forces other than the necessary forces to support the leg motion of the person from acting on the person and enables the person to make a leg motion with feeling as if the person were not wearing the leg motion support orthosis as fully as possible.

A device and method for reliably and accurately obtaining respiratory information of a subject despite motion of the subject are disclosed. The proposed device comprises a motion signal computing unit for computing a number M of motion signals for a plurality of pixels and / or groups of pixels of at least a region of interest for a number N of image frames of a subject, a transformation unit for computing, for some or all M motion signals, a number of source signals representing independent motions within said images by applying a transformation to the respective motion signals to obtain source signals representing independent motions within said N image frames, and a selection unit for selecting a source signal from among said computed source signals representing respiration of said subject by examining one or more properties of said source signals for some or all of said computed source signals.

The invention discloses a multi-spray-head 3D printer and a cooperative printing method thereof. The multi-spray-head 3D printer comprises a movement mechanism and a control unit, wherein the movement mechanism comprises a machine body, and an XY movement assembly and a Z-axis movement mechanism fixed on the machine body, and a printing platform positioned on the Z-axis movement mechanism; N X-axis movement mechanisms which move independently relative to each other, N Y-axis movement mechanisms which move independently relative to each other and N wire feeding mechanisms which work independently relative to each other are arranged on the XY movement assembly; N is greater than or equal to 1, and N is an integer; all spray heads share the printing platform; and the X-axis movement mechanisms and the Y-axis movement mechanisms are arranged in parallel along a Y-axis guide rod. According to the multi-spray-head 3D printer, the plurality of the spray heads share one printing platform to carry out partitioned cooperative printing; software realizes seamless connection among partitions by virtue of reasonable path planning; and the spray heads are prevented from interfering from one another, so that 3D printing efficiency of a large preparation part is improved.

The invention discloses an embedded four-axis motion controller which comprises a main controller and a motion control module. An output of the main controller is connected with the motion control module through an output interface, and the motion control module is respectively connected with an X-axis motion component, a Y-axis motion component, a Z-axis motion component, and a U-axis motion component. The controller of the invention adopts an S3C44BOX chip based on an ARM7TDMI core which is promoted by the Samsung company as the main controller, adopts a motion control chip MCX314As which is specially used by the NOVA company in Japan as an interpolate controller, adopts a PC104 bus interface with strong insertion ability, combines the embedded CPU with a special DSP motion control chip, embeds the motion control function in the framework of the ARM main control plate with a PC 104 function module method, cuts off the equipment that is not in need, has a plurality of functions and saves the cost. The invention is an independent motion controller which can be separated from a host computer and is characterized by strong computing ability and low cost, thereby extremely reducing the size of the system, lowering the power consumption, and improving the reliability and the openness of the system.

A load roller assembly includes a first load roller that rotates about a first axis, a second load roller that rotates about a second axis, and a third load roller that rotates about a third axis. The first and second load rollers are configured to move vertically up and down independently of the third load roller. This independent movement of the first and second axes provide more stable and controllable support to the front end of lift truck forks.

An apparatus for powder-based additive manufacturing is described. The build unit(s) of the apparatus includes a powder delivery mechanism, a powder recoating mechanism and an irradiation beam directing mechanism. The build unit is attached to a positioning mechanism that provides the build unit with independent movements in at least two dimensions. The build platform of the apparatus is rotating and preferably vertically stationary. Embodiments of the build unit that further includes a gas-flow mechanism and the build platform having a dynamically grown wall are also described. An additive manufacturing method using the apparatus involves rotating the build platform and repetitive cycles of moving the build unit(s) in a radial direction to deposit at least one layer of powder, and irradiating a selected portion of the powder to form a fused additive layer.

The invention provides a teleoperation method of a high-dimensional motion arm aiming at a service robot. The high-dimensional motion arm comprises a gesture recognizer, a pair of immersive virtual 3D glasses, an embedded processor with a router and the service robot; an independent motion planning method is adopted for a mechanical arm, the planning method is independently operated by a remote service robot, and the independent planning method is a path planning method based on sampling. By using the teleoperation method, the motion of arms of the remote service robot can be controlled in real time and can be experienced in a first visual angle, and the robot can independently plan a feasible motion path according to true environment. The teleoperation method can be applied to home service robots and has wide application values in the fields of industrial robots and industrial virtual manufacturing industries.

The invention discloses a three-axis linkage numerical control welding machine, which comprises a frame and a welding gun, wherein the frame is provided with a three-axis driving mechanism; the welding gun is arranged on the three-axis driving mechanism; and the three-axis driving mechanism drives the welding gun to a pointed position according to a received control instruction. In the three-axis linkage numerical control welding machine, the driving mechanism capable of independently moving along X, Y and Z axes according to externally input instructions is arranged, so that the welding gun moves in a three-dimensional direction and can complete the welding work according to the preset spatial curve; therefore, great convenient is provided for producers, and the production efficiency is improved.

The invention discloses a three-freedom-degree series-parallel omni-directional mobile transfer robot. The transfer robot comprises an omni-directional mobile chassis, a main slewing gear, a lifting device, parallel working arms, a tail end slewing gear and a clamp holder. The omni-directional mobile chassis is used for executing walking and steering tasks, the lifting device is connected with the omni-directional mobile chassis through the main slewing gear, the parallel working arms installed at the top of the lifting device are connected with the clamp holder through the tail end slewing gear and are used for adjusting the operation posture of the clamp holder. A series-parallel is adopted in a robot body, and the omni-directional mobile transfer robot has the advantages of being high in rigidity, large in carrying capacity, high in motion precision, large in operation space and the like; the clamp holder has six motion ranges and three independent motion freedom degrees and is high in motion flexibility; the tri-drive omni-directional mobile chassis can realize walking tasks of moving forward, or moving backward, or turning left or turning right, and is reasonable in structural design, and high in anti-overturning ability. In addition, the omni-directional mobile transfer robot has the advantages of being convenient to manipulate, and high in adaptability to road conditions.

A sawhorse includes an elongated workpiece supporting structure and a pair of leg assemblies joined to the workpiece supporting structure, which enables the leg assemblies to be moved between a folded position for storage and transportation purposes and an operative position. Connecting structure connects the leg assemblies to retain the leg assemblies in the operative position thereof and to allow movement of the leg assemblies between the operative and folded positions thereof. Each leg assembly includes a pair of separate lower leg members and is mounted for independent movement in a generally vertical direction and adjusted to a plurality of different positions with respect to the associated leg assembly and the connecting structure while the pair of the leg assemblies are retained in the operative position thereof by the connecting structure. A releasable locking member for each leg member is mounted in the connecting structure for movement between a releasing position and a locking position.

The present invention provides a method and device for high resolution 3-D detection of changes in mechanical and structural properties of the breast tissue that are indicative of breast cancer development. In one embodiment of the invention a compact hand held device comprises a pressure sensor array, a self-contained motion tracking system integrated with the pressure sensor array, and an electronic unit with a display. Mechanical imaging of the breast is achieved by pressing the sensing pad onto the breast, oscillating it over breast tissue portions with sequential returning to a reference point. Calculation of a trajectory and orientation of the pressure sensor array can include correction of the device position and orientation with a suitable Kalman filter using measured signals supplied from the motion tracking system and from the pressure sensor array. Analysis of pressure response data for oscillatory deformations comprises cumulative summation of a plurality of pressure patterns after spatially shifting every pattern by a pre-calculated value in an opposite direction of pressure sensor array motion. Determining mechanical and geometrical features of the breast inner structures includes formation of a 3-D mechanical image of the breast combining results of local scanning at all breast sites using calculated position and orientation data for the pressure sensor array.

A clamp assembly secures a fixed portion of a steering column assembly to a movable portion of a steering column. It comprises a rack of teeth carried by the moving portion and a rack of teeth carried by the fixed portion and an inner hollow toothed block nested inside an outer hollow toothed block, each carrying at least one rack of teeth with the rack of teeth on the inner block facing the rack of teeth on the moving portion and the rack of teeth on the outer block facing the rack of teeth on the fixed portion. A retaining clip provides a lost motion coupling between the retaining clip and the inner toothed block and an independent lost motion coupling between the retaining clip and the inner toothed block and an independent motion coupling between the retaining clip and the outer toothed block. First, second and third springs bias the teeth of the blocks into and out of engagement with the racks when locked and unlocked. The assembly helps prevent damage to the teeth with the springs permitting the damage force on the blocks to be independently absorbed.

The invention provides an object and fractal-based binocular three-dimensional video compression and decompression method. In binocular three-dimensional video coding, a left channel is used as a basic layer, a right channel is used as an enhancement layer, and the left channel is encoded by an independent motion compensation prediction (MCP) mode. The object and fractal-based binocular three-dimensional video compression coding method comprises the following steps of: firstly, acquiring a video object partition plane, namely an Alpha plane by a video partition method, encoding the initial frame of a left eye through block discrete cosine transformation (DCT), and performing block motion estimation / compensation coding on a non-I frame of the left eye; secondly, determining the area attribute of an image block by utilizing the Alpha plane, and if the block is not within a video object area of the current code, not processing an external block, and if the block is within the video object area of the current code completely, searching the most similar matching block by a full-searching method in a previous frame of an internal block, namely a reference frame searching window of a left eye video; and finally, compressing coefficients of an iterated function system by a Huffman coding method, and if part of pixels of the block are within the video object area of the current code, and the other part of pixels are not within the video object area of the current code, processing a boundary block independently. The right channel is encoded by a MCP mode and a disparity compensation prediction (DCP) mode, the MCP is similar to the processing of the left eye, and the block with the minimum error is used as a prediction result. When the DCP coding mode is performed, the polarization and directionality in a three-dimensional parallel camera structure are utilized fully.

A mirror or other reflecting surface is used for collecting and reflecting incident solar radiation. The mirror is supported for independent motion about a pair of axes. An accelerometer generates signals representative of an amount and direction of motion of the mirror about each of the axes. Motors or other drive mechanisms independently drive the mirror about each of the axes. A tracking device provides information about the current position of the Sun. A control is connected to the accelerometer, the motors and the tracking device for maintaining a predetermined optimum orientation of the mirror as the Sun moves across the sky. Position sensors that sense the position of the mirror relative to the earth's magnetic field may also be employed.

The invention discloses an independent suspension system. Two suspension oil cylinders are arranged between wheel edges of wheels on two sides and a frame respectively, and a steering mechanism drives the wheels on the two sides to perform steering. Two upper V-shaped swing rods and two lower V-shaped swing rods are arranged corresponding to the wheels on the two sides. Rod connection end portions of the two upper V-shaped swing rods are hinged to the upper portions of the wheel edges of the wheels on corresponding sides through spherical hinges respectively, and rod separation end portions of the two upper V-shaped swing rods are hinged to fixing members fixed below the frame along the lateral direction. Rod connection end portions of the two lower V-shaped swing rods are hinged to the lower portions of the wheel edges of the wheels on corresponding sides through spherical hinges respectively, and rod separation end portions of the two lower V-shaped swing rods are hinged to the fixing members fixed below the frame along the lateral direction. By means of the independent suspension system, possible frustrating effects caused by the suspension oil cylinders can be avoided, mutual independent motion of the wheel on the left side and the wheel on the right side can be achieved reliably, adhesion conditions of the ground are fully utilized, and control stability of the complete machine is improved. On the basis, the invention further comprises a crane with the independent suspension system.

Systems and methods for reducing interference between multiple infra-red depth cameras are described. In an embodiment, the system comprises multiple infra-red sources, each of which projects a structured light pattern into the environment. A controller is used to control the sources in order to reduce the interference caused by overlapping light patterns. Various methods are described including: cycling between the different sources, where the cycle used may be fixed or may change dynamically based on the scene detected using the cameras; setting the wavelength of each source so that overlapping patterns are at different wavelengths; moving source-camera pairs in independent motion patterns; and adjusting the shape of the projected light patterns to minimize overlap. These methods may also be combined in any way. In another embodiment, the system comprises a single source and a mirror system is used to cast the projected structured light pattern around the environment.

A multiple punch and die assembly adapted to be placed in a punch press having a punch ram for imparting movement to a selected punch assembly for carrying out a punching or forming operation comprises a punch assembly for holding a plurality of selectively operable punches mounted for independent movement in the punch assembly so as to selectively engage a workpiece. The punch assembly has a punch carrier for reciprocal motion within a punch guide and a striker body engaging the punch carrier, said striker body being selectively, toollessly connectable to the punch carrier by a pair of tabs located on a lower circumference of the striker body, said pair of tabs located on a lower circumference of the striker body with a radial separation other than 180 degrees. A circumferential lip in the punch carrier receives the pair of tabs and has corresponding radially separated reliefs for allowing the pair of tabs to pass the circumferential lip, the engagement of the pair of tabs by the circumferential lip thereby locking the striker body to the punch carrier while permitting relative rotation of the striker body and punch carrier to select a punch for engagement by the striker. A detent means releasably positions the striker body in one of a plurality of operating positions, at which a punch is positioned for being struck selectively by the ram via the striker body such that one punch is driven to an operating position when at least one other punch is in inactive. In another embodiment the assembly has a stripper retainer that has precision pockets for holding strippers corresponding to the selectively operable punches.