421 results about "Angular deviation" patented technology

A biopsy guidance device is enclosed based on a tactile imaging probe adapted to accept a biopsy gun. The tactile imaging probe includes a pressure sensing surface providing real-time 2-D images of the underlying tissue structures allowing to detect a lesion. A cannula is provided supported at a center point by a ball and socket joint. The joint is equipped with linear and angular sensors and supports the cannula with the ability to rotate thereof about the center point. The position, linear and angular displacement and direction of the needle tip of a biopsy needle placed inside the cannula is therefore known at all times and provided as a feedback signal to a physician. Also provided to a physician is a position of the target site at a lesion, as well as a linear and angular deviation of the needle tip away from the target site. Such audio, light, or visual feedback allows the physician to correct the insertion angle and depth to confidently reach the target site to perform a biopsy. Method is also disclosed to guide the biopsy procedure.

A dynamic spacer is provided for measuring flexion-extension gap during total knee arthroplasty. The dynamic spacer is an improved surgical instrumentation system that it easy to use, simple in construction, and accurately measures flexion-extension gaps under repeatable soft tissue tension. The dynamic spacer generally comprises a first planar member having a lower tissue engaging surface, a second planar member having an upper tissue engaging surface. A tensioner is disposed between the first planar member and the second planar member for applying a tensile force acting upon the first and second planar members. The tensioner is fixedly attached to the first and second planar members, such that the first planar member is held substantially parallel to the second planar member in the absence of compressive load. The dynamic spacer allows for accurately measuring flexion-extension gaps and angular deviation in flexion indicating the appropriateness of femoral rotation.

There is provided an optical device, having a light-transmitting substrate (20) having at least two major surfaces parallel to each other and edges; a display light source; optical means for coupling light from the light source into the substrate (20) by internal reflection, and at least one partially reflecting surface (22) located in the substrate (20) which is non-parallel to the major surfaces of the substrate wherein the source emits light waves located in a given field-of-view, that the light waves are collimated, that an angular resolution is defined for the optical device, and wherein the angular deviation between any two different rays located in one of the collimated light waves, is smaller than the angular resolution.

A vehicle steering control device which prevents overshoot or a phase delay of a vehicle position from a target position when an actuator of a steering mechanism is controlled so that an integral control reduces a positional deviation of a vehicle from the reference position of a traffic lane. An FB control unit (60) which calculates a corrected steering assist torque (Tb) of a motor so as to reduce a positional deviation (Yd) and an angular deviation (Ah) includes an integral element determination unit (64), which determines an integral gain (Ki), by which the positional deviation (Yd) is multiplied in an integral gain operation unit (62), according to the positional deviation (Yd) and which determines a limit value (Icnt_lmt) of an integral controlled variable (Icnt) according to the positional deviation (Yd), and an integral controlled variable limiting unit (63) which limits the integral controlled variable (Icnt) to within a range set by the limit value (Icnt_lmt) and outputs the current integral controlled variable (Icnt_rel).

The invention relates to a hybrid navigation belt based mobile robot positioning system and a method thereof. The system is technically characterized by comprising a hybrid navigation positioning controller mounted on a mobile robot trolley, a hybrid navigation image collector and hybrid navigation belts distributed on the ground, wherein the hybrid navigation positioning controller is connected with the hybrid navigation image collector and used for collecting information of the hybrid navigation belts and achieving an accurate positioning function of a mobile robot. The method includes utilizing color belt images for performing transverse deviation correction and angular deviation correction of the mobile robot trolley; and utilizing two-dimensional code images for performing longitudinal deviation correction of the mobile robot trolley, and computing and positioning coordinate position of the mobile robot trolley in a world coordinate system. The system is reasonable in design, timeliness of transverse deviation correction and angular deviation correction of an autonomous navigation system of the mobile robot trolley is guaranteed, timeliness of longitudinal deviation correction by two-dimensional code is further guaranteed, and accuracy and reliability of autonomous navigation of the mobile robot are improved effectively.

The invention relates to a multi-scale normal feature point cloud registering method. The multi-scale normal feature point cloud registering method is characterized by including the steps that two-visual-angle point clouds, including the target point clouds and the source point clouds, collected by a point cloud obtaining device are read in; the curvature of radius neighborhoods of three scales of points is calculated, and key points are extracted from the target point clouds and the source point clouds according to a target function; the normal vector angular deviation and the curvature of the key points in the radius neighborhoods of the different scales are calculated and serve as feature components, feature descriptors of the key points are formed, and a target point cloud key point feature vector set and a source point cloud key point feature vector set are accordingly obtained; according to the similarity level of the feature descriptors of the key points, the corresponding relations between the target point cloud key points and the source point cloud key points are preliminarily determined; the wrong corresponding relations are eliminated, and the accurate corresponding relations are obtained; the obtained accurate corresponding relations are simplified with the clustering method, and the evenly-distributed corresponding relations are obtained; singular value decomposition is carried out on the final corresponding relations to obtain a rigid body transformation matrix.

Quantum processor architectures employ unit cells tiled over an area. A unit cell may include first and second sets of qubits where each qubit in the first set crosses at least one qubit in the second set. Angular deviations between qubits in one set may allow qubits in the same set to cross one another. Each unit cell is positioned proximally adjacent at least one other unit cell. Communicatively coupling between qubits is realized through respective intra-cell and inter-cell coupling devices.

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 sun-tracking solar drive can include hardware and / or be operated in accordance with a method in which angular deviations are compensated for operation including during forward tracking and backtracking. For example, the effects of thermal expansion and mechanical slop associated with certain components can be calculated and used for calculation of target angles that can provide for increased power output and improved shading avoidance.

The invention discloses a synchronous displacement adjustment type variable-stiffness joint driver. The synchronous displacement adjustment type variable-stiffness joint driver comprises a base, a swing arm position control assembly, a variable-stiffness adjustment assembly and an angular deviation measurement assembly, and is characterized in that the swing arm position control assembly is used for moving a swing arm to a specified equilibrium position point; the variable-stiffness adjustment assembly is used for changing the stiffness value of the driver according to the requirement of an actual task; the angular deviation measurement assembly is used for measuring and acquiring angular deviations for subsequent data processing and real-time stiffness control. The synchronous displacement adjustment type variable-stiffness joint driver is used for the variable-stiffness control of a robot joint, and can realize the flexibility of a driving system in terms of control without adding sensors, and thereby human safety is improved in the process of human-machine interaction. In addition, because of the special structural design, the energy consumption of a robot can be reduced, the joint structure is more compact, and good shock resistance and flexible dynamic characteristic lay a solid foundation for the movement of the robot in complex environments.

The invention relates to a target positioning method and a target positioning device for airborne equipment. The device comprises a signal processing unit, a laser distance measuring instrument, a thermal infrared imager, a visible light camera, a combined inertial navigation module and an angle meter, wherein output signals of the laser distance measuring instrument, the thermal infrared imager, the visible light camera, the combined inertial navigation module and the angle meter are all connected to the signal processing unit, and the signal processing unit is used for solving positional information of a target according to uploaded signals. Aerial carrier global positioning system (GPS) information, aerial carrier gesture information, angular deviation of observation equipment relative to an aerial carrier and distance measuring information of the target by the observation equipment are integrated to realize accurate positioning of longitude and latitude height of the target. The advantage of a multi-sensor is combined, a multi-dimensional spatial alternation principle is utilized so as to rapidly and effectively realize accurate target positioning in a non-contact and high-adaptability way, and the target positioning method can be applied to fields such as forest fire prevention, personnel rapid search and rescue and the like, and has wide technological and market prospects.

A device comprises a first digital camera having a first center line of sight and a second digital camera having a second center line of sight that is parallel and opposing the first camera. A method for controlling the first camera based on estimating the angular deviation between a person gaze direction and the line of sight of the first digital camera. A human face is detected in an image captured as an image file by the second digital camera, using a face detection algorithm. An angular deviation a is estimated, defined between the second center line of sight and an imaginary line from the second camera to the detected human face based on the captured image, and an angular deviation beta is estimated, defined between the imaginary line from the second camera to the detected face and the human face gaze direction based on the captured image.

Heat transfer devices and methods for making the same that include a first enclosure having at least one inlet port; a second enclosure having a bottom plate and one or more dividing walls to establish channels, at least one internal surface of each channel having rib structures to create turbulence in a fluid flow; and a jet plate connecting the first enclosure and the second enclosure having impinging jets that convey fluid from the first enclosure to the channels, said impinging jets being set at an angular deviation from normal to cause local acceleration of fluid and to increase a local heat transfer rate.

The invention discloses a computer-assisted puncture navigation system and a computer-assisted puncture navigation method under infrared guidance. The computer-assisted puncture navigation system and the computer-assisted puncture navigation method have the advantages that problems of human movement due to respiration, heartbeat, unconscious movement and the like of people, deviation such as angular deviation between existing puncture needles and existing puncture paths and distance deviation between needle points of the existing puncture needles and existing puncture centers and severe influence on existing puncture procedures can be solved by the aid of the computer-assisted puncture navigation system and the computer-assisted puncture navigation method; the infrared positioning method is implemented by the aid of the computer-assisted puncture navigation system, locations of puncture needles are monitored in real time in puncture procedures, and accordingly operators can timely find and correct deviation.

The invention discloses a positioning method in novel silk screen printing CCD (charge coupled device) image identification, comprising the following steps of: (a) conveying PCBs (printed circuit boards) to an operating platform part to be initially positioned and clamped by virtue of an introducing part and an operating platform conveying part; (b) obtaining a CCD positioning identification template by adopting a manually programming method; (c) calculating angular deviation and distance deviation by virtue of the PCBs and MARK points on a silk screen, controlling the operating platform to correspondingly adjust position and angle; and (d) moving an image acquisition device to the position above the PCBs and the MARK points, respectively shooting the PCBs and the MARK points of the silk screen by virtue of a CCD camera, matching the obtained image with the CCD positioning identification template, and carrying out automatic printing after a matching requirement is achieved. The invention provides a whole set of system, the system can automatically detect offset between the center of an object window required to be retrieved by a user and the center of any pattern, the offset is namely correction, the correction is added during counterpoint calculation, and counterpoint actuating quantity is calculated and a counterpoint action is executed. For various patterns used for counterpoint of a base plate, the various patterns can be simply counterpointed without high correction proficiency requirement, and printing counterpoint accuracy can be improved.

The invention discloses a vehicle track prediction method and system based on a Gaussian mixture model. The vehicle track prediction method comprises the following steps of (1) expressing an acquired track T to consist of time t, current time speed v and angular deviation phi corresponding to N in a 2D plane of a vehicle coordinate system; (2) adopting a phi<V> expressing method to describe the track, so as to obtain a unified expression of the track T; (3) predicting the track T based on the distribution of the Gaussian mixture model, and predicting the speed c<v> and angular deviation c<phi> at a future time; and (4) through the statistical characteristics of calculating condition distribution p(X<f>|X<h>), predicting the c<v> and / or the c<phi>, wherein the X<f> is an approximate future track, and the X<h> is a historical track. Through the adoption of the vehicle track prediction method disclosed by the invention, the tract situation of the vehicle can be predicted in advance, and the future track distribution can also be predicted, so that potential danger can be avoided in time.

The invention discloses a wafer angular deviation automatic method based on vision. The wafer angular deviation automatic method based on vision comprises the following steps: arranging a wafer on an absorptive disk of a four-axis numerical control machine tool platform system; adopting Hough changing to conduct detecting and positioning on images of the wafer shoot by a microcamera of the four-axis numerical control machine tool platform system; shooting an image on an A point of the wafer to determine positions of a feature straight line and a feature point of the wafer, and adjusting positions of the wafer according to an angle formed by the feature straight line and X- axis or Y-axis of the four-axis numerical control machine tool platform system; respectively shooting images on a B point of the wafer and a C point of the wafer again to conduct Hough change detection, checking whether the wafer is accurately positioned by judging whether an incline angle beta of midpoint connecting lines of feature straight lines of the B point of the wafer and the C point of the wafer is zero. The wafer angular deviation automatic method based on vision can accurately positions of the wafer and scribe lines, is high in reliability and rapid in reaction rate, promotes automation and intellectualization of wafer scribing technology, can control valid accuracy to 2 mu, shortens positioning time of the wafer, and improves machining efficiency of the wafer.

The present invention provides a laser axis calibrating method and a laser processing device utilizing the laser axis calibrating method. A laser outputted from a laser oscillator (1) is reflected towards a first direction through a first reflecting mirror (3A), and is reflected to a second direction through a second reflecting mirror (7A). The laser is branched into measuring lights (B) which are different in direction from a processing light in a focal direction through a light beam sampler (8), and the measuring lights are branched through a light beam splitter (12), a focal point position of the measuring lights (B1) focused on a plane of a two-dimensional semiconductor position detector (14) through a condensing lens (13) is detected, and axis deviation in a vertical direction is calculated, measuring lights (B2) are detected on a plane of a two-dimensional semiconductor position detector (15), and axis deviation of the measuring lights (B2) in a horizontal direction is calculated, angular deviation is adjusted by changing the angle of the second reflecting mirror, then the first reflecting mirror and the second reflecting mirror are made to perform reciprocating motion towards a laser outputting direction according to the deviation value in the horizontal direction, thereby adjusting the axis.

In steering apparatus and method for an automotive vehicle, a turning section that turns steered road wheels is provided, a clutch is installed in a predetermined position in a midway through a steering system from an operation input section to the steered road wheels to link between the operation input section and the steered road wheels, a steering angle of the operation portion is detected, a turning angle is detected, an elastically deformable member is interposed between the operation portion and the turning portion to transmit a steering torque inputted from the operation input section to the steered road wheels when the clutch causes the operation input portion and the steered road wheels to be connected; and an angular deviation between the steering angle detection value and the turning angle detection value developed due to a deformation of the member is calculated.

The invention discloses a three-dimensional in-situ stress testing method by acoustic emission method, comprising the following steps: 1) sampling and processing; 2) uniaxial acoustic emission test; 3) drawing a stress-accumulated acoustic emission ringing count-time curve; 4) Quickly discriminate the Kaiser effect points; 5) Calculate the three-dimensional stress state of the in-situ stress measuring points. The rock specimen sampling direction angle of the invention is flexible, the Kaiser effect point identification is quick and easy, the error in the calculation result of the in-situ stress caused by the deviation of the sampling angle is reduced, and the accuracy of the original rock stress test is also ensured.

An airborne system for producing electricity from wind energy includes a shaft, wind turbines rotatably mounted to the shaft and arranged to rotate independently in opposite directions when subjected to the same wind, and generators arranged to convert rotation of the turbines into electricity. A lifting section includes combination of kites and lighter than air balloons, generating a lifting force that caused the system being airborne at desire altitude. The center of gravity of the system is lower than the center of lift of the system; when the turbines of the system exposed to wind and start to rotate, torques are inducing on the shaft of the system; these torques are balancing each other and the remaining deferential torque being balanced by returning torque that is generated by the angular deviation of the center of gravity from it's lowest position, the magnitude of this returning torque, increasing as the angular deviation increased, until the system reach angular stability; electricity is generating and conducted through tether to an anchoring section for usage.

A device having an anchor block having orifices therethrough, each accommodating a tendon of the cable and a means of immobilizing the tendon. The device further includes a bearing piece for the anchor block, and means of guiding the tendons between the anchor block and a running part of the cable. The guide means are connected to the bearing piece and include an individual guide passage for each tendon of the cable, allowing angular deviation thereof. Each guide passages have, in the direction of the anchor block, a transverse layout aligned with that of the orifices in the anchor block.

The invention relates to method and a system of interpreting angular orientation data. It is determined, whether the angular deviation of a current angular orientation (C) of a sensor device (12) from a last extreme angular orientation (L) currently decreases after having increased before up to a provisional new extreme angular orientation (P), thereby determining that the provisional new extreme angular orientation (P) is a new extreme angular orientation. Information relating to a new extreme angular orientation, such as an angular range of motion, may be output to a user.

An airborne system for producing electricity from wind energy includes a shaft, wind turbines rotatably mounted to the shaft and arranged to rotate independently in opposite directions when subjected to the same wind, and generators arranged to convert rotation of the turbines into electricity. A lifting section includes combination of kites and lighter than air balloons, generating a lifting force that caused the system being airborne at desire altitude. The center of gravity of the system is lower than the center of lift of the system; when the turbines of the system exposed to wind and start to rotate, torques are inducing on the shaft of the system these torques are balancing each other and the remaining deferential torque being balanced by returning torque that is generated by the angular deviation of the center of gravity from it's lowest position, the magnitude of this returning torque, increasing as the angular deviation increased, until the system reach angular stability; electricity is generating and conducted through tether to an anchoring section for usage.

A spindle error measurement jig is attached to a spindle of a numerically-controlled machine tool. A probe capable of measurement in a moving axis direction of each axis of the machine tool is installed on a table. By means of driving-control of a linear shaft driving the table and a linear shaft elevating a spindle head, spindle error measurement is made by measuring a spindle center position measurement hole and a spindle angular deviation measurement end-face so as to make spindle error calculation. On the basis of the calculation result, an angular deviation and a spindle error compensation amount are acquired, and they are used as parameters for compensating relative movement amounts of the table and the spindle so as to correct the spindle error.

Airborne system for producing electricity from wind includes at least one shaft, one or more wind turbines rotatably mounted to each shaft, and generators that convert rotation of the turbine(s) into electricity. A lifting section is connected to the shaft(s) and generates a lifting force that causes the system to be airborne. A center of gravity of the system is lower than its center of lift. When the turbines are exposed to wind and rotate (at least one in one direction and another in an opposite direction), torques induced on the shaft(s) of the system balance each other and remaining deferential torque is balanced by returning torque that is generated by the angular deviation of the center of gravity from its lowest position. A magnitude of this returning torque increases as the angular deviation increases until the system reach angular stability. Electricity is generated and conducted for storage or usage.

The invention relates to an installation technique for optical parts and electric parts. More particularly, it provides an installation structure and an installation method for optical modules that are applied to an optical communication field. The installation structure and the installation method can permit large tolerance of angular deviation in the provisional mounting, and can realize automatic positioning with high precision in the final mounting. The structure includes: a substrate on which a plurality of first metal pads are formed; a part to be mounted having second metal pads corresponding to the positions of the first metal pads; and solder bumps for connecting between the first and second metal pads to match the installation positions of these metal pads based on the surface tension of the solder bumps when the solder bumps are fused. In this structure, the substrate and / or the mounted part has at least two metal pads having larger areas than those of other metal pads, in the vicinity of the center of the substrate and / or the mounted part.