185 results about "Angular shift" patented technology

An intraluminal device for placement in a side-branch vessel associated with a main vessel via an ostial region. The intraluminal device includes an anchor portion, a cap portion and an articulating module. The anchor portion of the device is placed in the side branch vessel and the cap portion includes multiple protruding elements which are configured to extend into the ostial region. The articulating module includes a body and connectors, configured to provide large angular shifts over short distances and to absorb a portion of force causing a linear movement of the cap portion toward the anchor portion.

A drive control method includes detecting an angular displacement of a rotor driven by a pulse motor, calculating a difference between the detected angular displacement and a preset target value of the angular displacement, and calculating a drive pulse frequency of a drive pulse signal used to drive the pulse motor. The pulse motor is driven by the drive pulse signal having the drive pulse frequency to allow the rotor at a constant angular velocity.

A digital stereotaxic manipulator for animal research is provided with two enhancements. In one enhancement, rotary encoders are provided, to allow tilting of the manipulator, about vertical and / or horizontal axes, to be measured within a fraction of a degree. With assistance from software that applies sine and cosine values, orthogonal coordinates that are emitted by linear reader heads can be corrected to provide accurate orthogonal coordinates, even when an instrument has been rotated and / or tilted substantially. In a second enhancement, a “fine-drive” mechanism provides precise control over dorsal / ventral motion of an instrument. A radial gear is mounted on the main threaded shaft in the vertical arm assembly. A helical gear on a horizontal shaft is used to drive rotation of the radial gear and vertical shaft. If a 1:20 gearing ratio is provided by the helical and radial gears, this provides an operator with 20-times more precise control over vertical motion of an instrument. A detente is also provided, to enable the helical gear to pop out of position without damage, if an operator rotates the main vertical shaft before disengaging the fine-drive mechanism. A digital display device with touch-screen controls is also disclosed.

A device may include a camera to capture an image; a sensor to measure, when the camera captures the image, information indicative of an angular displacement, about a line of sight of the camera, of an orientation of the device away from a reference orientation of the device; storage to store the measured information for rotating the image relative to a frame of the image based on the angular displacement.

A sprayer device including a generator for generating an air stream having a predetermined velocity and a nozzle unit for the discharge of liquid therefrom, whereby to produce a mist stream capable of being propelled to a predetermined location. The mist stream has a measurable and controllable lateral dimension at the predetermined location. The sprayer device is used particularly for moistening cattle, especially cows, in sheds, and taking into account the effect of the wind. Rows of sprayers project water sprays directed toward the cattle. The sprayers may be angularly shifted to take into account the deviating effect of the wind. A processor calculates the angular shift that is needed for the existing wind direction and intensity. All the sprayers concurrently receive the angular shift, which is transmitted to the first sprayer from a control station and successively from each sprayer to the next. In this way, a plurality of sprayers can be controlled even if they are not arranged in straight lines or on a single level, depending on the structure of the cattle shed.

A multi-layer polarization grating includes a first polarization grating layer, a second polarization grating layer on the first polarization grating layer, and a third polarization grating layer on the second polarization grating layer, such that the second polarization grating layer is between the first and third polarization grating layers. The second polarization grating layer has a periodic molecular structure that is offset relative to that of the first polarization grating layer along an interface therebetween. The third polarization grating layer may also have a periodic molecular structure that is offset relative to that of the second polarization grating layer along an interface therebetween. As such, the periodic molecular structures of the first and second polarization orating layers may be out of phase by a first relative angular shift, and the periodic molecular structures of the second and third polarization grating layers may be out of phase by a second relative angular shift. Related fabrication methods are also discussed.

The invention discloses a method for improving angular displacement measurement accuracy of an optical fiber gyroscope. The method comprises the following steps of: (1) fixing the optical fiber gyroscope on a high-accuracy rotary table to keep a measuring shaft of the optical fiber gyroscope in parallel to a rotating shaft of the high-accuracy rotary table; (2) marking scale factors of the optical fiber gyroscope at different rotary table input angular rates to acquire a correspondence table between the angular rates and the scale factors; (3) taking the optical fiber gyroscope off the high-accuracy rotary table and fixing on a measured rotating device to keep the measuring shaft of the optical fiber gyroscope in parallel to the rotating shaft of the measured rotating device; (4) solving an average value of output values of the optical fiber gyroscope in a testing time under the condition that the measured rotating device is static; (5) rotating the measured rotating device and continuously recording each output value of the optical fiber gyroscope; and (6) calculating a rotation angle, namely the angular displacement of the rotating device by using the correspondence table in thestep (2), the output average value in the step 4 and each output value in the step (5).

The invention relates to a method for detecting reflective liquid level displacement based on angular displacement tracking, which comprises the following steps that: a light-emitting device generates a beam of visible light or invisible light through a group of lenses, and the visible light or the invisible light enters a liquid surface at a certain angle alpha to generate reflected light at the same angle; by using the other group of lenses on a receiver, the reflected light is received by a photoelectric conversion device to form images on a detection surface so as to generate electric signals, and the electric signals are treated by a circuit to determine the initial position of the liquid level as shown in a figure; when the liquid level is displaced, the emitting angle of a light beam is changed continuously in a mode of synchronous tracking to form the angular displacement of emitted light, and a light image track proportioned with the liquid level displacement can be generated on a fixed detection surface; and the distance of the liquid level displacement can be acquired according to the angular displacement through circuit and routine calculation according to a trigonometry theory, and if the time when the displacement happens is recorded at the same time, the speed of the liquid level displacement can be obtained. Because the position of the liquid level and the light beam emitting angle have a one-to-one correspondence relation, when the displacement distance is large, the angles of an emitted light beam and a receiving lens can be simultaneously changed to detect the distance and the speed to the liquid level displacement.

A spray device including a fan located in a housing provided with an air outlet guide for generating an air stream having a predetermined velocity. A nozzle unit for the discharge of liquid therefrom, producing a mist stream capable of being propelled to a predetermined location and having a measurable and controllable lateral dimension at the predetermined location. The spray device is used particularly for moistening cattle, especially cows, in sheds, and taking into account the effect of the wind. Rows of sprayers project water sprays directed toward the cattle. The sprayers may be angularly shifted to take into account the deviating effect of the wind. A processor calculates the angular shift that is needed for the existing wind direction and intensity. All the sprayers concurrently receive the angular shift, which is transmitted to the first sprayer from a control station and successively from each sprayer to the next.

The invention relates to an MEMS (Micro-electromechanical Systems) comb-finger off-plane electrostatic driver structure with low driving voltage and a production method thereof. The driver structure comprises a fixed electrode, a movable electrode, an anchor, a combined torsion beam, a driving output part and a signal lead out bonding pad, wherein the fixed electrode is a comb-finger electrode fixed on a substrate; the movable electrode is a comb-finger electrode connected to the driving output part; and the combined torsion beam comprises two groups of foldable torsion beams and one bracket cross beam, and is suspended and fixed on the substrate. According to the driver structure, angular displacement is converted into linear displacement through the adoption of the combined torsion beam, so that not only can large-stroke off-plane motion under low driving voltage be achieved, but also the influence of the electrostatic pull-in effect can be refrained, and the reliability of the driver can be improved. The off-plane electrostatic driver and the production method have the advantages that the technological process is simple and is compatible with various types of MEMS device technologies, and integration with other micro-optic-electro-mechanical systems can be achieved.

Embodiments of the invention relate to a permanent magnet synchronous motor control method and device based on an angular displacement time-delay-free observer, and aims to improve the position loop response speed of a control system while the angular displacement feedback lag delay generated in a control system angular displacement sampling calculation process is eliminated. According to the angular displacement observation method, an angular displacement observation model is established according to a motion equation of the permanent magnet synchronous motor, and a time-delay-free angular displacement feedback signal is obtained, so that the angular displacement feedback speed of the control system is further improved, and the response capability of the control system is improved.

The magnetic induction angular shift sensor for detecting rotating, inclined and vertical angular shift consists of permanent magnet, and magnetic induction sensor fixed to the frame. The permanent magnet has one axial end plane inclined to the rotating shaft and produces magnetic field, and with the coaxial rotation of the magnetic induction sensor relative to the permanent magnet, the distance between the axial end plane and the magnetic induction sensor changes gradually and the sensing area of the magnetic induction sensor senses gradually changed magnetic field representing the detected angular shift. The present invention has higher sensitivity when the rotating shaft, permanent magnet, etc. is regulated.

A camera system (1) is provided which includes an interchangeable lens (40) including a group of lenses (L1, L2, L3, L4) for imaging an object, and a camera (10) to which the interchangeable lens (40) is to be installed. The camera (10) includes a correction angle information calculating means (20) for calculating correction angle information as to the posture of the camera (10), and a first sending means (29) for sending calculated correction angle information to the interchangeable lens (40). The interchangeable lens (40) includes the lens (L2) which optically corrects angular shift on the basis of the correction angle information sent by the first sending means (29).

A method and system for detecting operator alertness of an operator of a vehicle or machine comprises an image collection system. The image collection system collects reference position data and reference motion data associated with an operator, or a portion thereof, when the operator is in an alert state. An image, processor determines observed position data and observed motion data of one or more points of a three dimensional representation of the operator during a time interval. An analyzer sends an alert signal to alert the operator if a detected angular shift of one or more reference points of the representation exceeds at feast one of a displacement threshold and a motion threshold.

The invention discloses a method for measuring altitude difference and a digitalizer. The method is as follows that an instrument measures four inclination angle values and a point-point horizontal included angle; the point-point topography altitude difference data can be obtained according to the triangle principle; and then the horizontal distance and the gradient data of the point-point topography can be obtained by using the cosine theorem and gradient mathematic expression. The digitalizer comprises an optical laying component, a horizontal rotating disc, a display screen, an electric-control function unit, an external control unit and an A-frame component. The optical laying component comprises a telescope and a tilt angle sensor arranged on the telescope. The horizontal rotating disc is arranged on the A-frame component, is provided with the display screen and the external control component, and is internally provided with an angular displacement sensor arranged on the rotation axis center of the horizontal rotating disc and an electric-control function unit. The method and the device can fast accurately measure the point-point altitude difference, the horizontal distance and gradient in time.

A computer-implemented method and system for displaying nodes on a display device. First positions are used for locating a first node and a second node on the display device. The first node and second node are separated from each other and are at least substantially equidistant from a predetermined center position. Second positions are determined for the first node and second node such that angular shift of the first node from its first position to its second position is different in magnitude than angular shift of the second node from its first position to its second position. These angular shifts for the first node and second node are with respect to the center position. The first node and second node are displayed on the display device based upon the determined second positions for the first node and second node.

A multi-layer polarization grating includes a first polarization grating layer, a second polarization grating layer on the first polarization grating layer, and a third polarization grating layer on the second polarization grating layer, such that the second polarization grating layer is between the first and third polarization grating layers. The second polarization grating layer has a periodic molecular structure that is offset relative to that of the first polarization grating layer along an interface therebetween. The third polarization grating layer may also have a periodic molecular structure that is offset relative to that of the second polarization grating layer along an interface therebetween. As such, the periodic molecular structures of the first and second polarization grating layers may be out of phase by a first relative angular shift, and the periodic molecular structures of the second and third polarization grating layers may be out of phase by a second relative angular shift. Related fabrication methods are also discussed.

This invention provides a sort of metrical method which realizes the forecast of the angular displacement of the numerical control rotating floor by the time-bar displacement sensing device. Add an intelligent interface unit between the time-bar and the numerical control system, the import of the intelligent interface unit is the absolute value of the angle which is measured by the time-bar; the export is the increment type impulse signal which can connects with the currency numerical control system. The intelligent interface unit progresses the forecast to the angular displacement figures in the unborn spell according to several discrete absolute value of the measured angle of the time-bar which is in the nonce and in the past. It corrects the predictive error figures which are in the former time slice according to the real measured angle figures which is in now. It realizes the predictive measure of the angular displacement of the numerical control rotating floor. This invention applies to the displacement sensing device with the timing sampling that the time-bar is used to be the deputation, and it applies to the position feedback of the whole closed loop which is from the function unit of the numerical control division likes the numerical control rotating floor, and so on.

A method and system for detecting operator alertness of an operator of a vehicle or machine comprises an image collection system. The image collection system collects reference motion data associated with an operator representation when the operator is in an alert state. An image processor determines observed motion data of one or more points of a three dimensional representation of the operator during a time interval An analyzer sends an alert signal to alert the operator if a detected angular shift of one or more points of the representation exceed a displacement threshold.

The screw extruder drive digital control comprises inputting running data by the operator and work station control computer control motor running, with the motor using switch magnetic resistance speed regulating motor, based on the input data, through the calculation of the work station control computer control motor, switch magnetic resistance speed regulating motor driving the extrusion of the screw. Switch magnetic speed regulating motor provides power to spiral compressor, through regulating angular displacement and velocity of the speed regulating motro to control the displacement and speed change of the slide of the compressor, realizing digital control fo the spiral compressor with simple structure, free from speed regulation, easy control of the slide displacement velocity.

The invention provides a bearing unit for testing and controlling the angular displacement of a revolving platform, which mainly consists of a work bedplate, a supporting seat, a bearing body arranged therebetween, a control system, a driving device and an angular displacement testing device, wherein the bearing body is formed by a moving coil, a static coil and a rolling body; and the angular displacement testing device is formed by a magnetic grid ruler and a sensor. The bearing unit has flexible and convenient installation, combines with the real-time test of a high-precision bearing, feeds an angular displacement signal back to a controlling system, and achieves the aim of closed-loop control. The work bedplate is driven by the driving device, a signal output end of the controlling system inputs the driving device, the angular displacement testing device immediately tests the angular displacement and inputs the signal to the controlling system when the work bedplate is rotated, and the controlling system controls the driving device to modify the angular displacement of the work bedplate.

A mechanism for adjusting the relative angular orientation of two coaxial components includes a mandrel having a cylindrical central section between upper and lower splined sections, a sleeve rotatably and slidably disposed around the mandrel's central section, and generally cylindrical upper and lower ratchet members positioned, respectively, about the mandrel's upper and lower splined sections. The ratchet members have internal grooves which receive the mandrel splines for torsional load transfer while permitting limited rotation relative to the mandrel, but their axial positions relative to the mandrel are fixed. The upper and lower ends of the sleeve have circumferentially-arrayed ratchet teeth engageable, respectively, with corresponding teeth on the upper and lower ratchet members. The central sleeve has torque-transferring external splines slidable within matching grooves on the inner surface of a cylindrical tool housing enclosing the mechanism. The mandrel is rotatable relative to the housing, but its axial position is fixed. The teeth of the sleeve and ratchet members are configured such that movement of the sleeve from a position engaging the upper ratchet member to a position engaging the lower ratchet member, or vice versa, will effect an incremental angular shift of the mandrel relative to the tool housing, while maintaining effective transfer of torsional loads therebetween.

The present invention relates to an inertial micro-sensor of angular displacements comprising at least one inertial mass (112, 1210) movable in space (x, y, z); an exciter (131) configured to generate a first vibratory movement of the inertial mass along a first direction (X) included in the plane (x, y), so as to generate a first Coriolis force induced by an angular displacement of the inertial mass (112, 1210) around a second direction (Y) included in the plane (x, y) and perpendicular to the first direction (X); an exciter (131) configured to generate a second vibratory movement of the inertial mass along the second direction (Y), so as to generate a second Coriolis force induced by an angular displacement of the inertial mass (112, 1210) around the first direction (X), and means for detecting the first Coriolis force and the second Coriolis force, characterized by the fact that the detection means comprise a common detector for the first Coriolis force and the second Coriolis force and configured to produce an electrical signal processed by a processing circuit so as to distinguish a first component of the electrical signal corresponding to the first Coriolis force and a second component of the electrical signal corresponding to the second Coriolis force.

A controller for a synchronous motor, the controller being operable in use to receive from sensor means coupled to a synchronous motor actual angular displacement signals representative of angular displacements from a reference orientation of a rotor of a synchronous motor, to transmit the actual angular displacement signals to a controllable alternating current (ac) supply for the motor, periodically to measure one or more parameters related to the torque of a synchronous motor, and between transmissions of the actual angular displacement signals, to derive from the actual angular displacement signals and measured parameters at least one estimated angular displacement signal representative of an estimated angular displacement from a reference orientation of a rotor of a synchronous motor, to enable the controller to cause to flow between the supply and a synchronous motor a generally sinusoidal current that is synchronised to the angular displacement of the rotor from the reference orientation.

A method for forming a sequence of images of a subject obtains at least first and second image sets of the subject, each image set having a given angular displacement relative to an axis of rotation of the subject, each image set having at least a first component image of a first diagnostic modality at the given angular displacement and a second component image that is co-registered to the first component image at the given angular displacement. The first image set is selected as the selected image set for display. A synthesized image is formed by combining image data for the at least first and second component images of the selected image set and the synthesized image is displayed.

A method and system for detecting operator alertness of an operator of a vehicle or machine comprises an image collection system. The image collection system collects reference motion data associated with an operator representation when the operator is in an alert state. An image processor determines observed motion data of one or more points of a three dimensional representation of the operator during a time interval. An analyzer sends an alert signal to alert the operator if a detected angular shift of one or more points of the representation exceed a displacement threshold.