483 results about "Position bias" patented technology

Several new components are provided for a mortise lock. First, a non-handed clutching assembly, including a pair of spindle hubs rotatable within a pair of outer hubs, is provided for a mortise lock. Second, a spindle-mounted lock-handing selector—which can be removed from one side of the lockset body while the lockset body is installed in the mortise of a door—is provided to set the handing of the clutching assembly. Third, an escapement mechanism is provided for a reciprocating-slide-based clutch-actuator assembly, enabling the slides to move into a position biasing a locker-carrying lever toward a hub-coupling position, even if the outer and spindle hubs are misaligned. Fourth, a guardbolt-actuated blocking assembly for a lockset is provided to block movement of the stop works or clutch works when the door is closed and the outside door handle is disabled.

The invention discloses a vision guiding AGV (Automatic Guided Vehicle) system and a method of an embedded system. Two cameras fixed on a trolley are used for acquiring guiding path information in real time, wherein the cameras and the ground form a certain angle to be inclined forwards and is used for acquiring prospect images; and the cameras are arranged at the middle part and the front part of the interior of the trolley, are vertical to the ground and are used for secondary exact location. The vision guiding AGV method comprises the following step of: embedding an anti-metal radio frequency mark on the ground surface of a key position, wherein a vehicle-mounted radio frequency card reader obtains information in the mark when the trolley passes through the upper part of the mark. When a laser scanner scans a front obstacle in real time, obstacle avoidance detection and obstacle avoidance are realized. A control box of the embedded system disclosed by the invention is as an inner kernel for image collection, image treatment and policy control, the acquired image is subjected to Gauss high-pass filtering, edge detection and two-step Hough transformation so that position deviation and angle deviation of the trolley relative to a current path can be calculated, and two-dimensional deviation value of the AGV currently corresponding to a location reference point is fed back at a station point.

The invention discloses a visual real-time deviation rectifying system for a robot. The robot comprises a robot body (4) and an end tool (5) connected to the tail end of the robot body. The system comprises a visual module (3) and a robot controller (2), wherein the visual module (3) is electrically connected with the robot controller (2), and is used for acquiring target image information in real time, processing the acquired target image information so as to obtain position deviation information between the end tool (5) and a target, and sending the position deviation information to the robot controller (2); and the robot controller (2) is electrically connected with the robot body (4), and is used for generating a real-time servo command for controlling the end tool (5) according to the position deviation information from the visual module (3), and sending the servo command to the robot body (4) in real time so as to perform real-time deviation rectifying for the end tool (5).

The invention discloses a track and posture composite control method in a shield tunneling process. The method comprises the following steps of: performing control by setting threshold values for a posture and a track; immediately adjusting the posture as long as the posture deviates to exceed the limit even though the track does not reach a deviation correction threshold; solving current positional deviation Si and angular deviation theta I of a shield machine through measurement and calculation when a shield works; continuously propelling the shield machine when the Si is less than or equal to a positional deviation threshold value Scmin of a track and posture composite controller and theta i is less than or equal to an angular deviation threshold value theta cmin of the track and posture composite controller or when the Si is less than or equal to positional allowable deviation Smin of actual tunnel construction and theta i is equal to 0; contrarily, automatically adjusting propelling pressure of a hydraulic cylinder of each sub-region and propelling displacement to simultaneously eliminate the positional deviation and the angular deviation generated in a tunneling process. Thus, an actual tunneling route of the shield machine is controlled within a design axial range of a tunnel, unnecessary overbreak and underbreak are avoided, and the forming quality of the tunnel is improved.

A surgical capture component for deployment from a distal end of a catheter formed of a plurality of radially positionable shaped members each having a deployed position biased to radially position around a center axis and having a collapsed position adjacent to a loop a planar loop portion. The loop may be electrified to cauterize tissue. Deployment of the shaped members is provided by mechanical release or automatic release of a restraint when the loop is electrified.

An inspection apparatus and method are provided capable of suppressing electron beam focus drifts and irradiation-position deviations caused by sample surface charge-up by irradiation of an electron beam during micropattern inspection to thereby avoid false defect detection and also shorten an inspection time. The apparatus captures a plurality of images of alignment marks provided at dies, stores in a storage device deviations between the central coordinates of alignment mark images and the coordinates of the marks as a coordinate correction value, measures heights at a plurality of coordinates on the sample surface, captures images of the measured coordinates to perform focus adjustment, saves the relationship between such adjusted values and the sensor-measured heights in the storage as height correction values, and uses inspection conditions including the image coordinate correction values saved in the storage and the height correction values to correct the image coordinates and height of the sample.

The invention provides an apparatus and method for detecting the multiple optical axis consistency of a platform photoelectric instrument. The detection method comprises a detection host, a support mechanism and a data control processing system. A catadioptric optical collimating system,a multiband target plate and a target light source are adopted for determining the axial direction of each optical system, a CCD aiming assembly is utilized for acquiring the image of the same fixed target in a distant scene, afterwards, an image processing module performs pretreatment, coupling and optical axis parallelism calculatingon the image by using a template coupling method so that the position deviations of the same fixed target in different images is obtained and a detection result of the light axis consistency among the multiple optical systems can be further obtained. The apparatus is free from the axis distance restrictions among optical sensors, no cooperation targets and no calibration adjustment are needed, the detection precision is high, the volume is small, the weight is light, the operation is convenient, and the automation degree is high, therefore, the apparatus and method well satisfy the on-line rapid detection needs for detecting the multiple optical axis consistency of the platform photoelectric instrument in a field environment.

The invention relates to an unmanned vehicle path tracking control device and method based on multipoint tracking. The unmanned vehicle path tracking control device is composed of a GPS data acquisition module, a vehicle speed acquisition module, a data preprocessing module, a calculation module and a wire control execution system. The unmanned vehicle path tracking control method comprises the steps that a GPS position and attitude information of a vehicle are collected and acquired in real time, and GPS coordinates of points on a tracking track path are collected; the track information is preprocessed, and a tracking track is smoothed by Gaussian filtering; and a preview window, a preview interval and preview points of a tracking path reference point are determined, the heading angle deviation and the position deviation of the current vehicle coordinate point and the selected interference preview points are calculated, the front wheel rotation angle corresponding to each preview coordinate points is calculated according to the position deviation and the heading angle deviation, the front wheel rotation angle corresponding to each preview coordinate point is determined according to road condition information and vehicle condition information, and each front wheel rotation angle is added and output according to equal weight to achieve the purpose of path tracking.

A fiber optic component includes a body having at least one receptacle configured to receive a fiber optic connector, a shutter base mounted to the body at a mounting location adjacent to the at least one receptacle, and a first shutter connected to the shutter base by a first hinge. The first shutter, first hinge and shutter base are unitarily formed, and the first shutter is shiftable from a first position biased against the body and covering the at least one receptacle to a second position biased to an angularly spaced position relative to the first position.

In an image forming apparatus for forming a color image by superposing component color images, a control device obtains position data representing a forming position of each of plural registration mark images for the component color images with respect to a positional reference value arbitrarily determined, divides the position data into each of a unit reference range representing a range in which one mark image is formed, converts the position data divided for each unit reference range into those based on respective reference values representing the front edge of the unit reference ranges, extracts the position data representing ranges common to the mutually overlapping ranges each of which is represented by a couple of position data corresponding to the rising and falling edges of a passage timing pulse as read position data of the mark image of the component color, and calculates the amounts of positional deviations of the component color images from one another on the basis of the position data extracted.

The invention discloses precise assembling and adjusting device and method for a detector chip of an imaging system. The assembling and adjusting device comprises a movement control system, a detection system, an accessory structure and a computer; the movement control system is composed of a translation stage, a revolving stage and a tilting table and used for adjusting the spatial positions of a device to be detected and the detection system; the detection system is composed of an autocollimation and a telecentric digital microimaging system and used for measuring the angle and positional deviation of the device to be detected; and the compute is able to control the movement of the translation stage and record the position coordinates and can also be used for acquiring an image of the device to be detected from the telecentric digital microimaging system and analyzing and calculating. The assembling and adjusting method includes the assembling and adjusting of a reference mirror, the transmission of the angle and position of the detector chip, and the assembling and adjusting of the detector chip; the measurement precision of the angle and position respectively reaches second level and micro dimension during the assembling and adjusting; and the deviation of angle and position of the detector chip can be respectively less than 1 and 0.02mm after the assembling and adjusting.

An electrical connector (1) for a flexible circuit includes an insulative housing (2) defining a circuit-insertion slot (201) in one face thereof and a pair of actuator holes (211) in opposite sides thereof, a number of terminals (3) mounted to the housing and spaced along the slot for engaging conductors spaced along the flexible circuit, and an actuator (4) having a shaft (41) pivotally located in the actuator holes for movement between an open position allowing insertion of the flexible circuit into the slot and a closed position biasing the circuit and its conductors against the contact portions of the terminals, and a pair of positioning members (5) formed on the shaft to prevent the shaft from falling out of the actuator holes.

The invention provides an automatic guiding control method, device an system. The method comprises the steps of obtaining the angle deviation and the position deviation of an AGV; judging wether the current deviation state of the AGV is in a terminal domain state according to the angle deviation and the position deviation; adopting a corresponding control strategy to control the AGV to enter the terminal domain state if the current deviation state of the AGV is not in the terminal domain state; in the terminal domain state, controlling the AGV to move to a balance point so as to simultaneously remove the angle deviation and the position deviation; utilizing the angle deviation and the position deviation of the AGV to plan out the traveling track of the AGV in a future period through calculation so as to eradicate deviation, and handling the whole control process from the angle of the overall situation.

The invention discloses an information search method and a display information sorting weight value determination method and device. When the information which is displayed on a search result page is searched by an information search server according to a query term, sorting weight values of the information to be displayed are determined according to a display information sorting model and a click log and the sorting of the display information is determined according to the sorting weight values. The display information sorting model is based on the assumption that the probability that a user clicks the display information after viewing the display information depends on the self-display-information and the probability that the user views the display information located at the location I depends on the number of times that the display information located at the locations before the location I is clicked and the location position of the clicked display information and closet to the location I in the locations before the location I. According to the information search method and the display information sorting weight value determination method and device, the influence on the sorting of the position bias can be reduced and the reasonability of the sorting can be improved when the display information is sorted based on the click information.

The invention discloses a method for driving and controlling a permasyn motor based on the magnetic field orthotropic control. The position bias of a stator magnetic pole and a rotor magnetic electrode is obtained by a rotor magnetic pole position signal provided by a position encoder arranged inside the permasyn motor; the bias is set into orthogonality by 90 degrees to form the closed loop control so as to ensure that the two magnetic fields are in orthogonality; on the base, the vector is controlled to be unfolded on a stator current system of polar coordinates so as to directly control the torque of the permasyn motor by controlling the magnetic field of the stator, and the magnetic field of the rotor is constant. The method saves system resources of the basic magnetic field directional vector control strategy, simplifies the system structure and lowers the cost under the application situation with low requirement, lowers the system expenditure in the servodrive control with high requirement, and gives the control resources to the complicated control, thereby improving the control performance.

A servomotor driving controller capable of highly accurate machining, which prevents a quadrant projection upon change in the quadrant where machining is made. After the position deviation converges to zero by means of learning control, the velocity command or a difference between the velocity command and the commanded velocity which is the derivative of the position command is stored as velocity correction data. Until a predetermined time period elapses from when the sign of the position command is reversed, an amount of correction for each period of position loop processing is determined based on the correction data, and used to correct the velocity command.

Provided is a contactless power transfer device for a moving object. Each of a power transmission coil and a power receiving coil comprises an H-shaped core, and first, second and third search coils are installed on a magnetic pole object of the H-shaped core of the power transmission coil. A y-direction positional deviation between the power transmission coil and the power receiving coil is detected using voltages measured at the first and second search coils, and an x-direction positional deviation is detected using voltages measured at the third search coils.

The invention provides an automatic tracking method of a double-foot robot. The method includes: a vision sensor arranged on the double-foot robot sends navigation path image information under the feet of the robot to a processor; the processor processes the received navigation path image information, obtains a relative position relation between a current attitude of the robot and a navigation path, and sends the relation to a controller, wherein the relative position relation includes an angle deviation and a position deviation; and the controller controls the robot to adjust the walking pathto realize automatic tracking according to the received angle deviation and the position deviation. According to the method, the navigation path image information acquired by the robot is sent through the vision sensor; graying, mean filtering, the Canny edge detection algorithm and extraction of path edge coordinates are performed on the image to obtain path information, and the accuracy of thepath information is improved through interval scanning; in path recognition, a slope matching method is proposed for a cross path to select an optimal forward path; and therefore, good timeliness andanti-interference capability are achieved.

The invention discloses a machine-vision-based raster stereo image flat printer for realizing stereo printing on a raster plate matrix. The printer comprises a printing system, a visual sense measuring system and an error correction processing system, wherein the visual sense measuring system is used for obtaining the image of a raster plate on the printing system and detecting a position and an angle; the error correction processing system calculates the position deviation of the raster plate and the printed image according to the position and the angle and controls the printing system to perform corresponding position error correction according to the deviation so that a stereo image can be obtained by printing at an accurate position. By using the printer and the method provided by the invention, the problems of low printing precision, complicated operation, difficult automation realization and the like in a conventional raster stereo image printing process can be overcome, a method of machine visual sense measuring positioning and mechanical and visual sense auxiliary error correction is adopted so that the stereo image printing based on the raster plate can be realized, the material adaptability can be improved, the operation is convenient, and the printing precision is high.

The invention discloses an underwater robot attitude and position control method based on double-closed-loop active disturbance rejection. The method is characterized by firstly, for a underwater robot, using a momentum and moment theorem and using a conversion relation between a geodetic coordinate system and a body coordinate system to establish a dynamical model; designing the speed loop expansion state observer of the underwater robot to observe unmodeled and external disturbances and carrying out real-time compensation suppression so that the anti-disturbance performance of a speed loop is greatly increased and the robustness of a system is improved; aiming at the high frequency vibration characteristic of the speed loop, using a disturbance observation value to construct a speed loopactive disturbance rejection controller based on nonlinear function feedback; based on a non-linear function fhan, designing the tracking differentiator of a target position signal, giving the transition process and the target speed estimation value of a position signal, avoiding the sudden change of system response and solving the conflict of rapidity and overshoot; and designing a underwater robot position loop proportion-differential controller based on position deviation feedback, wherein the controller is suitable for engineering application.

The invention discloses a deception jamming signal detection method based on a single receiver. The method comprises steps: the position of a satellite after correction under an ECEF coordinate systemis acquired, satellite clock offset correction, ionosphere delay correction and troposphere delay correction are used to correct a measured pseudo range to obtain a pseudo range after correction, a least square method is used for iterative solution, the first position of a carrier under the ECEF coordinate system is obtained, and based on a pseudo range double difference model of the satellite, Taylor's approximation is carried out for iterative solution to obtain the second position of the carrier under the ECEF coordinate system; and according to whether the position offset between the first position and the second position is larger than a preset threshold, whether the currently-received signals are the deception jamming signals is judged. The detection is realized by only requiring the single receiver or a single antenna and the pseudo range measurement information, requirements on equipment are low, the algorithm is simple and efficient, the realization process is simple, and themethod is applicable to generation-type deception jamming and forward-type deception jamming.

A machine tool capable of automatically correcting an orientation of a workpiece or machining attachment based on detection results from position detectors that the machine tool inherently has. The machine tool comprises: position detectors; position deviation determining means; contact detection means that detects a contact between a probe and a surface of the workpiece or the machining attachment based on a position deviation; movable axis stopping means; coordinate value detection means; inclination determining means; and correction means. The inclination determining means moves linear axes to perform detection of contacts between the probe and the surface of the workpiece or the machining attachment at least two different points, and determines an inclination of the workpiece or the machining attachment using the obtained coordinate values. The correction means corrects a mounting error of the workpiece or the machining attachment, or corrects the machining program based on the determined inclination.

The invention relates to a precise path tracking control method for an autonomous underwater vehicle, and the method is used for linear path tracking control. The method is a path point tracking control method which is more precise. The method enables AUV to precisely move along a linear path between two path points through lateral tracking control, prevents an actual path from deviating from an expected line because of the initial position deviation of the AUV, and is more suitable for the fields with the higher requirements for the path tracking precision, such as the seabed exploration and butt joint recovery.