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

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 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.

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, 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.