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35 results about "Rotational transition" patented technology

A rotational transition is an abrupt change in angular momentum in quantum physics. Like all other properties of a quantum particle, angular momentum is quantized, meaning it can only equal certain discrete values, which correspond to different rotational energy states. When a particle loses angular momentum, it is said to have transitioned to a lower rotational energy state. Likewise, when a particle gains angular momentum, a positive rotational transition is said to have occurred.

Electric brake apparatus

ActiveUS20120193177A1Maintaining predetermined control accuracyMaintain control accuracyElectrodynamic brake systemsBraking componentsRotational transitionPiston
The present invention provides an electric brake apparatus capable of maintaining predetermined control accuracy despite wear of a brake pad and other changes over time. The electric brake apparatus compares an estimated thrust force corresponding to a predetermined rotational position of an electric motor, which is calculated from an electric current / thrust force conversion function, with a reference thrust force based on a rotational position / thrust force table indicating a relationship between the rotational position of the electric motor and a thrust force of a piston to correct and update the electric current / thrust force conversion function, thereby maintaining predetermined control accuracy despite wear of the brake pad and other changes over time.
Owner:HITACHI ASTEMO LTD

High resolution non-contacting multi-turn position sensor

Disclosed are systems and methods for effectively sensing rotational position of an object. In certain embodiments, a rotational position sensor can include a shaft configured to couple with the rotating object. The shaft can be configured to couple with a magnet carrier such that rotation of the shaft yields translational motion of the carrier. A magnet mounted to the carrier also moves longitudinally with respect to the axis of the shaft, and relative to a magnetic field sensor configured to detect the magnet's longitudinal position. The detected longitudinal position can be in a range corresponding to a rotational range of the shaft, where the rotational range can be greater than one turn. In certain embodiments, the rotational position sensor can include a programmable capability to facilitate ease and flexibility in calibration and use in a wide range of applications.
Owner:BOURNS INC

Cap analysis technique

A technique to assess or analyze cap removal or opening torque or rotational position is provided. In at least one form, a high speed, on-line machine vision system measures or determines the rotational position of a cap on a bottle, measures or determines the rotational position of the finish or neck of the same bottle, and then optionally uses such positional information to predict the opening or removal torque that will be required for a consumer to remove the bottle cap from the bottle.
Owner:PRESSCO TECH INC

Gemstone viewer

An apparatus for viewing images of a gemstone is described. The apparatus comprises a support structure for supporting the gemstone at an observation position. An illumination structure comprises a plurality of directional light sources directed towards the observation position so as to illuminate the gemstone. The support structure and illumination structure are relatively rotatable relative to one another about a rotation axis. An imaging device is arranged to obtain images of the gemstone at the observation position at a variety of relative rotational positions between the illumination structure and support structure: the imaging device has an imaging axis passing through the observation position. The support structure is arranged so that the gemstone can be placed at the observation position in such a way that the normal to a selected facet of the gemstone is within a range of tilt angles from the rotation axis. The arrangement of directional light sources is such that, for any tilt angle within the range, at least one of the directional light sources will be specularly reflected from the selected facet into the imaging device for at least one rotational position of the support structure.
Owner:DE BEERS UK LTD

Alternating current motor control system

An alternating current motor control system includes a three-phase synchronous alternating current motor, a rotational position sensor, and a motor control portion. The three-phase synchronous alternating current motor includes a rotor. The rotational position sensor detects a rotational position of the rotor. The motor control portion digitizes a detection signal of the rotational position sensor into a rotational position signal with a resolution that a quotient when an electrical angle of 360 degrees is divided by a multiple of 3 is set to a quantization unit. The motor control portion performs a rectangular wave control of applying a rectangular wave voltage based on the rotational position signal so that an energizing current of the three-phase synchronous alternating current motor is commutated every electrical angle of 60 degrees.
Owner:DENSO CORP

Auxiliary power tool handle

ActiveUS8800412B2Control the rotational reaction of the toolApply rotational force and longitudinal force more easilyRod connectionsPortable power-driven toolsRotational transitionSafety control
A handle for controlling a power tool by configuring the handle in either a straight or T-shaped position. In the straight position, the handle design serves as a rotational safety control that allows a user to control the rotational reaction of the tool by placing the user's hand in a position that is perpendicular to the main body of the tool. In the T-shaped configuration, the user can apply rotational force and longitudinal force more easily because the hand position is tangent to the tool base. A fastener couples a base of the handle to a band that grips the power tool and facilitates the user control.
Owner:SNAP ON INC

Vibration exciter for construction machines

A vibration exciter for construction machines, particularly for vibration pile drivers, includes at least one axle having at least two imbalance masses. At least one rotary piston pivot motor is provided, by way of which the rotational position of at least one imbalance mass, relative to the at least one other imbalance mass, can be changed. The rotary piston pivot motor has a pivot motor housing that is mounted on a pivot motor shaft so as to rotate relative to it. At least one rotary vane is disposed on the pivot motor shaft, the angle of rotation of which vane is limited by at least one stop disposed on the pivot motor housing. The maximal angle of rotation of the at least one rotary vane amounts to less than 160 degrees, preferably 150 degrees or less.
Owner:ABI ANLAGENTECHN BAUMASCHEN INDBEBEDARF

Contactless rotary pull switch

A contactless rotary pull switch includes a switch knob assembly rotatable about an axis to a plurality of rotational positions and actuatable to at least one pull position, with the switch knob assembly including a knob element and a rotational shaft fixedly coupled thereto. A rotational magnet is coupled to the rotational shaft so as to rotate therewith, and at least one pull magnet is positioned separately from the rotational magnet. A rotational sensor senses a magnetic field generated by the rotational magnet to identify a rotational position of the switch knob assembly and at least one pull sensor senses a magnetic field generated by the pull magnet(s) to identify a pull position of the switch knob assembly. A rotatable arm member selectively enables / inhibits sensing of the magnetic field generated by the pull magnet(s) by the at pull sensor(s), to identify distinct pull positions of the switch knob assembly.
Owner:EATON INTELLIGENT POWER LIMITED

Electric discharge machine with rotary table

A rotary table device of an electric discharge machine is provided with a face plate on which a workpiece is placed, a power unit that generates a driving force for rotating the face plate, and a speed reducer connected to the power unit and configured to reduce the rotational speed of the power unit. The respective centers of rotation of the power unit and the speed reducer are disposed on one and the same axis, and a rotation detector for detecting a rotational position of the face plate is disposed in a space defined by an outer peripheral portion of the speed reducer and an inner wall of a housing of the rotary table device.
Owner:FANUC LTD

System and Method For Rotational Position Tracking Of Brake Lathe Adjustment Assembly

An on-car brake lathe is provided with a runout compensation system configured to monitor the rotational position of a pair of slant discs within an aligning joint of the on-car brake lathe. The system monitors the amount of runout present between the rotating components of the on-car brake lathe and the wheel hub to which the on-car brake lathe is secured. The system calculates the appropriate rotational position for each slant disc within the aligning joint required to impart a necessary adjustment in the wheel coupling rotational axis in order to align the on-car brake lathe with the rotational axis of the wheel hub. Finally, an adjustment mechanism is activated to rotationally drive each slant disc directly to the calculated rotational position with a minimum amount of rotational movement based on the current rotational position of each slant disc and the required calculated rotational positions.
Owner:HUNTER ENG

Peristaltic pump device

A micro peristaltic pump of a peristaltic pump device presses a rotor against a circular arc shaped flow path inside a microfluidic chip formed to be sheet-like, rotary-drives the rotor by a motor, and causes the circular arc shaped flow path to make a peristaltic motion by the rotation of the rotor, to send a fluid. The peristaltic pump device is provided with a rotation sensor that detects a rotational position of the rotor, a memory that stores in advance a rotational position of the rotor and rotation speed data of the motor corresponding to the rotational position, and a control circuit that calculates a command rotation speed of the motor from data stored in the memory based on a detection signal of the rotation sensor, and controls rotation of the motor based on the command rotationspeed.
Owner:TAKASAGO ELECTRIC

Diode pumped alkali-molecular lasers and amplifiers

Optically-pumped mid-infrared vibrational-rotational transition gas lasers and amplifiers with improved efficiency and practicality. Inventive laser and amplifier devices include: laser active media comprising a mixture of alkali vapor, selected hetero-nuclear molecular gas, and one or more buffer gases; conventional semiconductor laser diode pump sources with nanometer scale spectral bandwidths; and preferential laser emission in ro-vibrational transitions among relatively low-lying vibrational levels.
Owner:WFK LASERS

Downhole Rotational Vibrator

A jarring device includes an outer housing which defines an axial flow path therethrough. An impact rotator is retained within the housing and is rotatable therewithin between a first rotational position and a second rotational position to create a jarring impact. A torsional spring biases the impact rotator toward the first rotational position. Fluid flow through the housing rotates the impact rotator from the first to the second rotational position.
Owner:BAKER HUGHES INC

Lens control device and lens control method

A lens control device that moves a lens in an optical axis direction comprises a stepping motor that drives the lens, a position detection circuit that detects position of the lens in an optical axis direction, a memory that stores data relating to a relationship between rotational position of the stepping motor and detected position of the position detection circuit, and a controller that designates rotational position of the stepping motor based on target information that is input, determines a virtual target rotational position based on a target position corresponding to detected position of the position detection circuit corresponding to the target information that has been input, and, based on the virtual target rotational position, searches for a rotational position that corresponds to the target position, within a range of given rotational positions of the data.
Owner:OLYMPUS CORP

Peristaltic pump device

A micro peristaltic pump of a peristaltic pump device presses a rotor against a circular arc shaped flow path inside a microfluidic chip formed to be sheet-like, rotary-drives the rotor by a motor, and causes the circular arc shaped flow path to make a peristaltic motion by the rotation of the rotor, to send a fluid. The peristaltic pump device is provided with a rotation sensor that detects a rotational position of the rotor, a memory that stores in advance a rotational position of the rotor and rotation speed data of the motor corresponding to the rotational position, and a control circuit that calculates a command rotation speed of the motor from data stored in the memory based on a detection signal of the rotation sensor, and controls rotation of the motor based on the command rotation speed.
Owner:TAKASAGO ELECTRIC

Rotatable end of dose feedback mechanism

An injection device for injecting a medicament includes a housing, a dose setting member (20) movable to set a dose to be injected, and a signal part (7). The signal part rotates from a first rotational position to a second rotational position to increase loading on a spring or spring arm when a dose is set due to rotation of the dose setting member. An internal pressure builds up in the injection device during injection which results in the signal part being captured in the second rotational position between first and second internal parts of the injection device. After the internal pressure dissipates by a sufficient amount during injection, the signal part rotates under the urging of the loaded spring from the second rotational position back to the first rotational position. A portion of the signal part moves into contact with a surface when the signal part reaches the first rotational position to produce tactile or audible feedback indicating that an end of dose condition has been reached.
Owner:ELI LILLY & CO

Control device for automatic transmission

A control device for an automatic transmission includes a current detecting unit for detecting motor current. The current detecting unit has a counter for counting variation number of a rotational position signal output from a rotational position detecting unit for detecting the rotational position of a motor, and an electrical angle 180° judging unit for judging rotation of electrical angle 180° of the motor. A voltage occurring in a current detecting resistor is sampled at a timing of each integral multiple of the electrical angle of 180° judged in the electrical angle 180° judging unit, and rotation of the motor is controlled in accordance with the difference between motor target current calculated in the motor target current calculating unit and motor current.
Owner:MITSUBISHI ELECTRIC CORP

Rotational position detecting method for AC servomotor and simple encoder

A motor rotational position detecting method detects the magnetic pole position of each phase of a three-phase AC servomotor, generates a three-phase square wave signal having a phase difference of 120 degrees, allocates data on the rotational position of a motor shaft to the edge of each square wave signal, calculates the rotational speed of the motor on the basis of the elapsed time from the previous edge detection point to this time edge detection point, and estimates the rotational position of the motor shaft at a certain period and outputs it on the basis of the rotational speed of the motor and the rotational position allocated to this time edge in the rotational section from this time edge detection point to the next edge detection point. As a result, a detection mechanism can be constructed with a small installation space and at low cost and the output of a high-resolution encoder can be obtained in a pseudo manner.
Owner:HARMONIC DRIVE SYST IND CO LTD

Display device

The purpose of the present invention is to cut down the travel distance of a display image on receiving a stop instruction intended for a stepping motor and thereby reduce a feeling of strangeness perceived by a user. A display device allows a user to view the image displayed on a display at a prescribed display position. The display device comprises: a stepping motor having a rotor including a magnet and driven by a micro-step drive method; a reflector which moves in accordance with the rotation of the rotor in the stepping motor so as to move the display position; and a motor control device. The motor control device identifies a rotational position of the rotor between adjacent stable excitation positions, and moves the rotor to reach the closer of the stable excitation positions on the basis of the identified rotational position on receiving a stop instruction intended for the stepping motor.
Owner:NIPPON SEIKI CO LTD

A layout check calculation method based on vehicle suspension system

The present invention relates to the technical field of automobile suspension systems, in particular to a layout check calculation method based on automobile suspension systems, which is used to accurately judge whether the positional relationship between the torque axis and the elastic axis is reasonable, including: obtaining the left suspension elasticity The position of the elastic center of the center and the right suspension to determine the elastic axis; the torque axis is determined according to the position of the center of mass of the powertrain and another point, and the position of this point is based on a given value S, the center of mass of the powertrain and the rotation of the powertrain The inertia and product of inertia are calculated; at the same time, the elastic axis and the torque axis are unified into the vehicle coordinate system; and then it is judged whether the angle and distance between the elastic axis and the torque axis are reasonable. The invention can accurately judge the rationality of the position of the automobile suspension system, avoid adjustment after the automobile suspension system has not been calculated and arranged, save manpower and material resources, and accelerate the development progress of the complete vehicle.
Owner:BRILLIANCE AUTO

A motor control device that controls a motor based on the back EMF voltage of the motor winding

The invention discloses a motor control apparatus for controlling a motor based on counter-electromotive voltage generated in winding of the motor. The motor control apparatus includes: a unit configured to determine a counter-electromotive voltage in a winding of a motor; a unit configured to determine a rotational position of a rotor of the motor based on the counter-electromotive voltage; a unit configured to determine a first velocity of the rotor, based on change in the rotational position; a correction unit configured to obtain a second velocity by correcting the first velocity based on a harmonic component included in the first velocity; and a driving unit configured to drive the motor based on the second velocity and the rotational position. The correction unit includes a unit configured to obtain the second velocity by reducing error in the first velocity that occurs due to the harmonic component.
Owner:CANON KK

Turn operation module and game controller using it

InactiveCN103357175BConscious operation modeSimple structureVideo gamesRotational transitionComputer module
The invention discloses a rotary operating module and a game controller with the same. The rotary operating module comprises a first supporting portion, a second supporting portion, a rotating unit, a first angle sensor and a second angle sensor. The first supporting portion is provided with a hollow containing portion, and the second supporting portion can rotate along a first direction and a second direction relative to the first supporting portion and is provided with a sliding rail. The rotating unit comprises a hollow base, a first rotating shaft, a second rotating shaft and a sliding rod, the hollow base is positioned in the hollow containing portion, the first rotating shaft is fixed to the outer wall of the hollow base and rotatably connected to the hollow containing portion along the first direction, the second rotating shaft is rotatably arranged on the hollow base along the second direction, the sliding rod is fixed to the second rotating shaft, and one end of the sliding rod is rotatably arranged on the sliding rail. The first angle sensor is arranged on the first rotating shaft, and the second angle sensor is arranged on the second rotating shaft. A more conscious operating mode can be obtained, and the rotary operating module is simple in structure and high in detection accuracy.
Owner:MINGSHUO COMP (SUZHOU) CO LTD +1
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