46results about How to "Accurate precision" patented technology

A method for estimating the state of a system, as well as an extended Kalman filter (EKF), allows nonlinear mathematical models to be used for describing the system. Accurate precision is provided since the method is based on an EKF technique while using a filter that implements a first degree Stirling approximation formula. The method may be used for estimating position and speed of a brushless motor, and may be implemented in a relative device. Such a device may be introduced in a control loop of a brushless motor of a power steering system for a vehicle to provide a countering torque on the steering wheel based on speed of the vehicle and a steering angle of the vehicle.

The invention provides a method which uses transient online diagnosis coupling frequency response to position the leakage of natural gas pipeline, and relates to a natural gas pipeline failure detection and positioning method which can solve the problems that the existing method for detecting and positioning the leakage of the natural gas pipeline can not detect in real time, has long detection period, low positioning precision and high error report rate; real-time pressure value and real-time flux value are respectively collected at the upstream and downstream of the pipeline; the real-time downstream pressure value and the real-time flux value when the pipeline runs stably are reduced by the practical real-time pressure value and the practical real-time flux value at the downstream; if both of the two differences exceed the valve value, the leakage is considered to occur, otherwise the values are collected again; an excitation pressure wave is generated at the downstream end of the pipeline and the wave speed of the response wave of the excitation pressure wave is gained; according to the wave speed of the excitation pressure response wave and the time difference when the excitation pressure response wave is transmitted to the upstream and the downstream, the position of the leakage point is gained. The measurement and collection of the values are completed by normal equipments and the method can be used both in the built pipeline or pipelines under construction.

A tool for chip removing machining, including a replaceable cutting insert and a basic body. The basic body includes a rear fixing part, a front supporting part having an insert seat, and a tightening part situated over the support part, and spaced-apart from the front supporting part by a first gap and from the rear fixing part by a second gap. The tightening part is connected to the basic body via a joint. The joint is formed of at least one elastically resilient material portion and has an axis around which the tightening part is pivoted in order to press the cutting insert against the insert seat by a front finger. The rear fixing part includes an internal channel for feed of a fluid in the forward direction through the basic body. The internal channel extends into a second channel inside the tightening part via a channel section that is entirely or partly housed in a bridge which, like the joint, is formed of the material in the basic body, and which bridges one of the first and second gaps.

An apparatus for determining the location and state of an object in an environment is disclosed. Three or more light-emitting beacons are located in the environment, and each beacon transmits a light pattern that contains information needed to identify the beacon. An optical receiver is attached to the object whose location needs to be determined. The optical receiver comprising one or more cameras images the beacons, and identifies the apparent direction from which the beacon is coming based on the pixel or pixels illuminated by the beacon. The optical receiver also decodes the light pattern transmitted by each beacon to identify it. Finally, based on knowledge of the locations of the beacons in the environment and based on the apparent directions from which the beacons appear to be coming, the optical receiver determines its location, and thus the location of the object.

To provide a vibration reduction apparatus with improved blur correcting precision, an optical equipment and a method of manufacturing a vibration reduction apparatus with improved blur correcting precision. A vibration reduction apparatus comprising: a first member and a second member disposed to be opposite to each other and to be movable relative to each other when blur is correcting; and a wiring member that exerts a force between the first member and the second member along a direction that intersects with a direction of the relative movement of the first member and the second member.

The invention discloses a method for realizing the interaction searching between medias by integrating different modal information which includes the following steps: 1) building relation graphs to hypermedias and obtaining corresponding relative coefficient matrixes; 2) using media objects or the hypermedias inside or outside a database submitted by a user as a searching example to mark the initial matching degree; 3) utilizing the relative coefficient matrix between the hypermedias to repeatedly iterate to a stable state and broadcasting the matching ability to the un-marked hypermedias and returning to the hypermedias or the media objects of special modal states in the hypermedias with the matching degree of the searching example larger than 0.6; 4) periodically carrying out adjustment on the relation graphs of the hypermedia according to a searching example set and a positive example set. The invention integrates the bottom layer characteristics of various media objects and broadcasts the semanteme by the sibship between the media objects, thereby having a better searching effect; as the searching example and the state of a returning result can be different and are broadcasted by utilizing the semanteme, the searching is more accurate and the adaptation is broader.

A secondary datum scheme is used for identifying the location of the core-produced internal geometry of hollow investment cast metal parts that are made using a free-floating core design for implementing complex internal structural features. A set of datum pads are cast on a removable portion of the core print out to provide the secondary reference system. This secondary reference system precisely establishes the location of the core-produced internal geometry of the part exclusive of any fixed external primary datum structure/system so that, for example, precision machining and gauging may be performed upon such internal features during subsequent fabrication steps.

A navigation device 10 comprises: position detecting means 11 for determining the current position of a user from the absolute position in longitude and latitude by using the electric waves coming from a plurality of artificial satellites going around the earth; storage means 14 for storing the coordinates in longitude and latitude of nodes, as obtained by setting a starting point and a final place, on a scheduled route; display means 12 for displaying the current position and the scheduled route; and control means 16 for controlling the display on the display means 12 by converting the angular data of the absolute positions and the coordinates into distance data while making corrections according to the current position, and by calculating an element between the nodes thereby to calculate whether or not the current position is on the scheduled route, in dependence upon whether or not the distance between the element and the current position is within a predetermined range.

The precision of phase correction is improved. Provided are a detection unit (40) that detects a phase of arrival of a pilot signal at each of antenna panel on the basis of the pilot signal and a reference signal commonly transmitted to each antenna panel; a position specifying unit (51) that specifies a position of each of the antenna panels relative to a reference panel defined as an antenna panel for reference among the plurality of the antenna panels, on the basis of the phase of arrival and an angle of arrival formed between the direction of arrival of the pilot signal and the antenna panel; and a phase-shift setting unit (52) that sets respective phase shifts for the signals radiated from individual antenna elements on the basis of information about the positions of the antenna panels specified by the position specifying unit (51).

The invention relates to a pick-up lens for a high-resolution single group movement industry. A front group A with negative focal power, an iris diaphragm C and a rear group B with positive focal power are sequentially arranged in an optical system of the lens along the incident direction from left to right of light, wherein the front group A is sequentially provided with a positive meniscus lens A-1, a positive meniscus lens A-2 and a negative meniscus lens A-3, and the rear group B is sequentially provided with a glued group with tight joint of a biconcave lens B-1 and a biconvex lens B-2, a biconvex lens B-3 and a positive meniscus lens B-4. The pick-up lens disclosed by the invention has the characteristics of high resolution, large target surface, low distortion, small minimum photographic distance and the like, and can be in adaptation with a high-resolution CCD (charge coupled device) or a CMOS (complementary metal oxide semiconductor) video camera, realize high-resolution videography, simultaneously realize clear imaging with minimum photographic distance of 0.3m and enable the distortion to be lower than 1%.

The disclosure relates to a vertical displacement detecting device, comprising a fixed frame, a first guiding rail and a second guiding rail. The first guiding rail and the second guiding rail are respectively provided with a first sliding block and a second sliding block. The top or bottom surface of the blocking plate is contacted with a displacement detector. The second sliding block is provided with a traction wire. A top end of the fixed frame is provided with a pulley and a traction wire, and the traction wire is wound around the pulley, one end of the traction wire is connected with the first sliding block and the other end is connected to the second sliding block. The disclosure has the advantages of simple structure, accurate precision, low cost and simple realization method, and it is advantageous for wide use.

The invention provides a probe device, a precision detection method, a precision detection system, and a positioning system. The probe device includes a positioning part and a guide detection part, wherein the positioning part is provided with a support having three or more non-collinear positioning element installed thereon, and the guide detection part is connected with the support, has a first preset positional relation with the positioning elements, and has a cylindrical outer contour matched with a guide element of the positioning system. The precision of the guide element can be accurately detected, so that the control precision of a surgical robot is effectively improved, and the system safety is improved.

Precision embossing press. The press includes a rigid symmetric box frame and upper and lower parallel embossing platens mounted within the box frame for movement towards one another to provide an embossing compressive force on a work piece between the platens while maintaining parallelism between the platens. A thermal system controls platen temperature to heat the work piece for embossing and to cool the work piece for de-molding. A pneumatic actuator moves the lower platen toward the upper platen to emboss the work piece. A closed loop control system employing feedback and feed forward control loops controls platen temperatures and embossing force.

The present invention provides a high-precision analog-to-digital converter, includes a redundant weight capacitor array, a comparator, a code reestablishment circuit, a weight storage circuit and a control logic circuit. The redundant weight capacitor array collects input voltages and generates output voltages in a sampling stage. The comparator compares the output voltages of the redundant weight capacitor array. The code reestablishment circuit calculates an output code of the successive approximation type analog-to-digital converter according to the comparator output result and a capacitor weight in the weight storage circuit. The weight storage circuit stores the capacitor weight. The control logic circuit controls the sampling and conversion stages of the redundant weight capacitor array. The present invention also provides a DNL-based performance improvement method adapted to the analog-to-digital converter.

The invention relates to an electrical zooming and focusing six million-pixel day and night dual-purpose lens. The optical system of the lens is provided with a front lens group A with negative focal power and a rear lens group B with positive focal power sequentially along the light incident direction from left to right; a variable diaphragm C is arranged between the front group A and the rear group B; the front group A comprises a lens A-1, a lens A-2 and a lens A-3 which are arranged in sequence from left to right; the rear group B comprises a lens B-1, a lens B-2, a lens B-3, a gluing group for close connection of a lens B-4 and a lens B-5 and a gluing group for close connection of a lens B-6 and a n lens B-7 which are arranged in sequence from left to right. Through the motor accurately and electrically adjusting the lens, the view angle of a monitoring field can be conveniently selected; when the view field of the monitoring filed needs to be conveniently and accurately switched, adopting the lens is important, and the optical design is optimized; and the lens can be applied to the newest 1/1.8'' large-target plane CCD chip on the market, and monitoring needs of a supper large view angle can be met.

The invention relates to a low-distortion high-resolution day and night lens. The optical system of the lens is provided with a former group A and a latter group B which are arranged along incident direction of light rays from the front to the back in turn. The former group A comprises a gluing group formed by a convex-concave type lens A-1, a convex-concave type lens A-2 and a convex-concave type lens A-3 which are arranged from the front to the back in turn through close connection, and a double concave lens A-4. The latter group B comprises a plane convex lens B-1. The low-distortion high-resolution day and night lens is large in relative aperture so that images can be shaped more easily; resolution is high so that the low-distortion high-resolution day and night lens can be suitable for the requirement of two-million-pixel high-definition video photographing; and distortion is low so that clear imaging can be realized in a shorter object distance.

The invention relates to a large target surface high-precision optics heat-free temperature measurement lens which comprises a crescent lens A, a lenticular lens B, a crescent lens C and a crescent lens D, wherein the crescent lens A, the lenticular lens B, the crescent lens C and the crescent lens D are arranged in order along the left-right incident direction of light. The invention further relates to a large target surface high-precision optics heat-free temperature measurement lens adjustment method. According to the invention, the temperature measurement lens has the advantages of large relative aperture, large field angle, low distortion, large target surface, self-adaptive optics heat-free compensation, light structure and the like; different refractive index changes of an optical material at different temperatures are used to compensate the influence of temperature change on a focal plane; a heat-free design structure is simpler; the structure of the whole product is smaller; the weight is lighter; stable optical axis imaging is more clear; the reliability is higher; the requirement of the product imaging performance of a user is met; and the structure is more convenient for a customer to use.

The invention discloses a DDR3 storage protocol-oriented calibration controller, abandons a traditional clock control circuit and adopts a negative feedback structure to reduce the influence of the process, temperature and noise on a clock. The controller comprises a digital delay phase-locked loop, a mirror image multi-phase delay chain, a multi-phase selector and a high-precision phase interpolator, so accurate control, relatively low phase error and relatively short locking time on a clock are realized. According to the calibration controller for the DDR3 storage protocol, accurate delay of 128-level TAP of a DDR3 clock can be achieved under the condition that the highest frequency is 800 MHz, the highest delay accuracy can reach 9.77ps, the central position of a sampling clock delay data effective window is guaranteed, and sampling stability and reliability of the DDR3 high-frequency clock are improved.