71results about How to "Maintain positioning accuracy" patented technology

A haptic device for human/computer interface includes a user interface tool coupled via cables to first, second, third, and fourth cable control units, each positioned at a vertex of a tetrahedron. Each of the cable control units includes a spool and an encoder configured to provide a signal corresponding to rotation of the respective spool. The cables are wound onto the spool of a respective one of the cable control units. The encoders provide signals corresponding to rotation of the respective spools to track the length of each cable. As the cables wind onto the spools, variations in spool diameter are compensated for. The absolute length of each cable is determined during initialization by retracting each cable In turn to a zero length position. A sensor array coupled to the tool detects rotation around one or more axes.

This invention provides a measurement-while-drilling (MWD) downhole assembly for use in drilling boreholes which utilizes gyroscopes, magnetometers and accelerometers for determining the borehole inclination and azimuth during the drilling of the borehole. With the present invention, a secondary borehole for secondary recovery operations may be drilled with accuracy in proximity to a cased producing borehole.

A rotating stage assembly performs high precision rotational angle and position error correction by continuous sensing and correcting motor stage assembly errors. It performs these corrections, to adjust for motor environmental and operational errors by sensing and correcting using five sensors placed to measure the adjustments of five corresponding actuators, which adjust the entire motor rotating stage and rotary motor assembly relative to a reference frame.

A process for producing a combustor structural member, the process comprising a plate-like assembly formation step of brazing a first plate-like member formed from a heat-resistant alloy, and a second plate-like member formed from a heat-resistant alloy and having a plurality of fins on the surface, with the second plate-like member positioned with the fins facing the first plate-like member, by interposing a brazing filler metal comprising a melting point lowering element between the two plate-like members, thereby forming a plate-like assembly, a press molding step of press molding the plate-like assembly to form a combustor structural member of the desired shape, a strain location identification step of identifying, in accordance with the shape of the combustor structural member, strain locations where the strain generated during the press molding step exceeds a predetermined value, a localized heating step of performing localized heating of the locations within the plate-like assembly corresponding with the strain locations identified in the strain location identification step, and a cold press molding step, which is performed as the above press molding step and comprises subjecting the plate-like assembly to cold press molding with the temperature of the heated locations corresponding with the strain locations maintained at a desired temperature.

A navigation system with a capability of receiving positioning aiding signals from other users is disclosed. The first aspect is to serve both roles of mobile GPS receiver and mobile GPS station by receiving signals from positioning reference sources and transmitting out the estimated position. The second aspect is to receive other users' position estimates information and to measure distances from other users in the positioning aiding purpose. According to the aspects noted above: (1) the users will have much better chances in finding positioning aiding signals than conventional differential GPS receivers; (2) the more users exist, the better positioning accuracy is obtained; (3) without building local stations, ubiquitous positioning aiding signals are available.

The invention discloses a robot positioning method based on laser radar and IMU tight coupling, and the method comprises the steps: estimating the real-time motion state of a system through an IMU, extracting plane features for tracking through the point cloud data of the laser radar, and correcting the motion state estimated by the IMU through an observation model of the plane features. Accordingto the method of the invention, the MSCKF framework is utilized to realize advantage complementation of the laser radar sensor and the IMU sensor. On one hand, IMU high-frequency motion estimation can estimate the real-time state of the system, and on the other hand, the plane features extracted by the laser radar point cloud can be tracked in the environment in a robust manner, so that the system state can be corrected regularly, and the robustness and accuracy of positioning are maintained while the calculation complexity is reduced.

An object of the present invention is to provide a PC card having four SD memory cards therein, which maintains the positional accuracy of the SD memory cards and connectors, and has high contact stability. The PC card includes in its case a printed circuit board (3), connectors (4) secured to the printed circuit board (3), and pressing members (6) secured to the printed circuit board (3). The pressing members (6) hold two SD memory cards respectively, while pressing them to the printed circuit board (3) and the connector (4).

A method for manufacturing a stereoscopic image display apparatus includes a bonding step of bonding an image display panel and a phase difference element by disposing an adhesive layer between the entire surfaces thereof, the image display panel displaying a right-eye image and a left-eye image by regularly mixing them in a plane, the phase difference element including a right-eye image display section corresponding to the right-eye image and a left-eye image display section corresponding to the left-eye image, the phase difference element achieving different polarizations between the right-eye image display section and the left-eye image display section, the adhesive layer being composed of a transparent gel acrylic adhesive with a thickness of 25 to 100 μm, hardness of the adhesive being more than 0 and 350000 μN or less, holding strength of the adhesive at 40° C. after bonding being 8 to 20 N/20 mm.

A multi-coordinate orthodontic implant positioning device includes a measuring reference member having a predetermined thickness and being provided thereon with measuring scales formed of a radiopaque material. The measuring reference member is connected at an edge to a fixing member for fixedly attaching to the patient's teeth. The measuring scales define a coordinate-type positioning structure, which includes at least a main coordinate system and a sub-coordinate system. The main coordinate system divides the positioning structure into a plurality of coordinate blocks, each of which has a main coordinate code readable from the main coordinate system; and the sub-coordinate system is provided in some specified ones of the coordinate blocks. Since the main coordinate system and the sub-coordinate system are two different and independent coordinate systems, the use of them enables primary and more accurate positioning of an implant point to effectively upgrade the efficiency in the orthodontic implant surgery.

A method for locating a moving magnetic object, comprising: determining the position or the orientation of the magnetic object from measurements of an array of N (an integer greater than 5) tri-axial magnetometers mechanically linked to one another with no degree, the method also comprises the reiteration of the following steps. Estimating the position of the magnetic object relative to the array of magnetometers from measurements of the magnetometers made in a preceding iteration or from a measurement of a sensor distinct from the magnetometers of the array of magnetometers so that this estimation is obtained before making a new measurement using the magnetometers of the array; computing the distance between each magnetometer and the estimated position of the magnetic object; eliminating the Ni magnetometers closest to this estimated position, where Ni is a positive integer number strictly less than N; making a new measurement, by each non-eliminated magnetometer, of the magnetic field generated or modified by the magnetic object; and determining a new position or a new orientation of the magnetic object from the new measurements of the magnetometers which have not been eliminated and without taking into account new measurements made by the eliminated magnetometers, so as to obtain a new location of the magnetic object.

A method, dedicated to the fabrication of the panels having built-in heat pipe(s) and/or insert(s) (P), consists in a) providing a bottom plate (SI) comprising, in selected places on either side of the heat pipe or insert accommodation zones, tabs (L) which are substantially flat and suitable for being straightened above its upper face, b) partially straightening the tabs (L) toward the accommodation zones, c) positioning the heat pipes and/or the inserts (C1, C2) in each accommodation zone between the tabs (L) and in contact with the upper face of the bottom plate (SI), d) terminating the straightening of the tabs (L) so that they are pressed against the side faces of the heat pipes and/or inserts (Ci), e) depositing a selected thickness of a first adhesive against the side faces of the heat pipes and/or the inserts (Ci), f) positioning separating structures (N1-N3), substantially having the same height as that of the heat pipes and/or the inserts (C1, C2) on either side of the side faces of each heat pipe and/or insert and in contact with the upper face of the bottom plate (SI), and g) placing an upper plate (SS) above the heat pipes and/or inserts (C1, C2) and the separating structures (N1-N3) and in contact therewith.

The invention relates to a terminal structure of an electronic component, such as a tuner, in which a printed circuit board 1 on which electronic components including a pin header 2 having a plurality of pin terminals, and a case frame 3 housing the printed circuit board and having a notch opening exposing the pin terminals are provided. A guide hole 23 that penetrates from the upper surface of the pin header 2 to its lower surface in contact with the printed circuit board, and a guide axis 33—insertable into the guide hole 23—provided in a press portion 32 are provided, such that the pin header is held between the press portion 32 provided in the case frame 3 and the printed circuit board, enabling the pin header, even a slim, compact one, having a plurality of pin terminals to be fixed accurately to a predetermined position on the board with a predetermined posture.

The invention discloses a laser cutting machine with a focusing laser head. The laser cutting machine with the focusing laser head comprises a base, side guide rails, a front end supporting mechanism,a rear end rotating mechanism and a cutting mechanism, wherein the side guide rails are oppositely arranged on the surfaces of the two sides of the base; the cutting mechanism is movably installed onthe upper surface of the base, and the rear end rotating mechanism is installed on the surface of one side of the base through a guide rail and can move back and forth along the guide rail; the frontend supporting mechanism and the rear end rotating mechanism are arranged in parallel and are arranged at one end of the base, a main shaft is arranged on the rear end surface of the large disc, anda small gear shaft is connected to the inner wall of a through hole of a bearing seat through a bearing; and an outer locking nut is tightly connected to four clamping pieces of a locking bearing gland through threads, so that small gear shafts are clamped and positioned. According to the laser cutting machine with the focusing laser head, the laser cutting head of the laser cutting machine can set the focal point size, different focal point diameters are set according to different materials and plate thicknesses, and the problem that the thick plates cannot be cut by the optical fibers is solved; and the machine has the focusing function and can be used for cutting a workpiece with different material thicknesses, the position of the focal point can be adjusted only by parameter setting, and manual adjustment is not needed.

Plastic rod anchorage for the surgical treatment of the spine where the plastic rod (1) has at least two plane-parallel surfaces (1a) in order to uniformly clamp the rod (1) on its entire circumference.

A cam locus of the cam surface (G1) on the image plane side of the first group cam groove (27) of the rotating cylinder (21) has an angle to a flat surface where the optical axis crosses perpendicularly. In a case in which the cam follower (25) engages with (abuts on) the cam surface (G1) on the image plane side, an impact force is dispersed into the optical axis direction and into the rotating direction of the rotating cylinder (21), and a load which the cam follower (25) and the male helicoid (31) of the rotating cylinder (21) receive is reduced. Additionally, when the first group lens system (11) is pressed by a light load such as a hand operation by a user and the like, the cam follower (25) of the first group lens movement frame (15) engages with (or abuts on) the cam surface (G1) on the image plane side, and an angle of the cam surface (G1) is an angle that an occurring force in the rotating direction is so as to be a moving direction from the collapsed position (S1) to the wide angle end position (W1). Therefore, the rotating cylinder (21) does not rotate easily, and when the load is removed, returns to a position before the load is received.