Magnetic encoder and actuator
Granted: March 19, 2013
Patent Number:
8400096
First to fourth magnetic detection units (22-25) are arranged in opposition to a multipole magnetized surface (21a) of a multipole magnet (21) of a magnetic encoder (17). The first and second magnetic detection units (22, 23) are placed on positions separated from each other by 180 degrees on the periphery of the center of the multipole magnet and output an A-phase signal and a B-phase signal. The third and fourth magnetic detection units (24, 25) are placed on positions separated from…
Message synchronization over a stochastic network
Granted: March 12, 2013
Patent Number:
8396159
Methods and apparatus to communicate between a local component and a remote component, where the local component is connected to the remote component using a non-deterministic communication link. A local clock is synchronized with a remote clock to within a maximum offset. A rate message from the remote component is received at the local component, where the rate message includes a first time stamp. A data rate is adjusted using the rate message when the time of the local clock…
Segmented core motor stator
Granted: March 5, 2013
Patent Number:
8390166
Stator core of motor stator is equipped with a segmented core connecting body which connects in an annular shape a segmented core having a structure whereby laminated core plates are connected and held in place in a laminated state. To connect and fix core laminated plates by clamping, first and second dowels formed in each core laminated plate are used to connect and fix common rings by pressure-fitting them to the first and second end faces at either side of the segmented core…
Geared motor assembly
Granted: February 26, 2013
Patent Number:
8384260
A geared motor assembly has a rotation-transmitting shaft for transferring output rotation of a reducer on the front side of a motor to an output shaft sensor on the rear side of the motor. A front end portion of the rotation-transmitting shaft is securely bonded to a rotation output member of the reducer by an adhesive that exhibits flexibility or elasticity after hardening, and a rear end portion of the rotation-transmitting shaft is rotatably supported by a sensor cover via a bearing…
Dispersion compensation circuitry and system for analog video transmission with direct modulated laser
Granted: February 5, 2013
Patent Number:
8369712
An improved precompensation circuit includes a greatly improved differentiator in the dispersion precompensation path, a preprocessor in the dispersion precompensation path for reducing f2?f1 type Composite Second Order (CSO) distortion, and a broadband phase shifter for compensating undesired vector interaction between the laser predistortion and dispersion compensation.
Magnetic encoder and method of detecting absolute rotational position
Granted: February 5, 2013
Patent Number:
8368392
A magnetic encoder includes a multi-pole magnetic detecting unit having a multi-pole magnet. In the multi-pole magnetic detecting unit, first and second magnetic detecting elements that output sinusoidal signals having a 90° phase difference are arranged apart from third and fourth magnetic detecting elements at a mechanical angle of 180° . The first and third magnetic detecting elements are disposed at the same position represented by an electrical angle and output sinusoidal signals…
Wave gear device
Granted: November 6, 2012
Patent Number:
8302507
A bending state known as “coning,” in which the amount of bending of the flexspline gradually decreases in accordance with the distance from the open end of the spline, occurs in cup-type or “silk hat”-type wave gear devices. A tooth profile in which the tooth depth is kept constant and in which the bottom lands and top lands are parallel to each other along the tooth trace direction is used as the basic tooth profile for the circular spline and the flexspline of the wave gear…
Method for compensating for angular transmission error of wave gear device
Granted: October 23, 2012
Patent Number:
8296089
A positioning system (1) provided with an actuator (2) having a wave gear device (4) is driven and controlled by a semi-closed loop control for controlling the load position of a load device (5) based on the motor position of a motor shaft (31) of a motor (3). In a method for compensating for an angular transmission error by compensating for a motor shaft synchronous component ?Sync that occurs in synchrony with the motor position and is a relative rotation-synchronous component that…
Robot hand and method for handling planar article
Granted: October 16, 2012
Patent Number:
8287017
When dishes are held by means of a robot hand (10), its fixed side engaging plate (13) and movable side engaging finger (14) are moved under horizontal state toward a dish (20) to be handled, and the outer circumferential edge side portion of the dish (20) is inserted between them. The distal end portion (14b) of the movable side engaging finger (14) is then bent by a predetermined amount to the side of the dish (20) and the robot hand (10) is raised. Consequently, the dish (20) is…
Wave gear device
Granted: October 9, 2012
Patent Number:
8281688
A wave gear device is proposed having an anti-ratcheting mechanism having a simple configuration, wherein a center through-hole is formed in a cylinder hub of a wave generator, a small-diameter shaft end portion of a rotating input shaft is concentrically inserted in the center through-hole, and the two members are fastened by a fastening bolt, and a friction ring is concentrically sandwiched between the small-diameter shaft end portion and the cylinder hub and pressed in the radial…
Crossed roller bearing retainer and crossed roller bearing
Granted: October 9, 2012
Patent Number:
8282286
A retainer of a crossed roller bearing has a retainer body plate of rectangular profile corresponding to a rectangular cross-section of a race. Rectangular side surfaces on either side of the retainer body plate are inclined planes that slant in a direction of approaching one another from one corner to another corner along a diagonal line of the surfaces, and extend towards a bearing center in a state of having been installed in the race. Recesses for accumulating grease are formed in…
Robot hand and finger mechanism
Granted: October 2, 2012
Patent Number:
8276957
A robot hand converts the longitudinal extending and retracting motion of an actuating rod of a linear actuator into opening and closing motion of left and right first links via a link mechanism. The link mechanism includes left and right middle links composed of coil springs. When the left and right first links come in contact with an object to be gripped, the middle links elastically deform and expand, and the force gripping the object gradually increases due to the elastic deformation…
Transcoding for a distributed file system
Granted: September 11, 2012
Patent Number:
8266182
A method for transcoding a file on a distributed file system is described. The distributed file system stores portions of the file across a plurality of distinct physical storage locations. A request to transcode the file is received. The file is transcoded from a first format to a second format using a processing unit of at least one of the physical storage locations.
One-pot synthesis of chalcopyrite-based semi-conductor nanoparticles
Granted: July 31, 2012
Patent Number:
8231848
Ternary and quaternary Chalcopyrite CuInxGa1-xSySe2-y (CIGS, where 0?x and y?1) nanoparticles were synthesized from molecular single source precursors (SSPs) by a one-pot reaction in a high boiling solvent using salt(s) (i.e. NaCl as by-product) as heat transfer agent via conventional convective heating method. The nanoparticles sizes were 1.8 nm to 5.2 nm as reaction temperatures were varied from 150° C. to 190° C. with very high-yield. Tunable nanoparticle size is achieved through…
Rotational position detecting method for AC servomotor and simple encoder
Granted: July 31, 2012
Patent Number:
8232757
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…
System and method for adaptive video compression motion compensation
Granted: July 24, 2012
Patent Number:
8228991
Methods and systems for video coding are provided. A method includes receiving a digital video stream. The digital video stream includes multiple sequential independent frames. The method further includes storing a first frame of the digital video stream. The method also includes encoding a second frame of the digital video stream using motion compensation with the stored first frame as a reference.
Wave gear device
Granted: July 10, 2012
Patent Number:
8215205
In a cup-type or “silk hat”-type wave gear device (1), the rim thickness t of the flexible externally toothed gear (3) thereof satisfies the relations (0.5237Ln(R)?1.32)d?t?(0.8728Ln(R)?2.2)d if the reduction ratio R of the wave gear device is less than 80, and (1.5499Ln(R)?5.8099)d?t?(2.5832Ln(R)?9.6832)d if the reduction ratio R is equal to or greater than 80, where d is the radial deflection, measured at the position of the major axis of the neutral circle of the rim, in a state…
Wave-gear-type linear-actuation mechanism
Granted: June 5, 2012
Patent Number:
8191439
A wave-gear-type linear-actuation mechanism comprises a flat-type wave gear; a lead screw that is a structural component of the wave gear and is formed on an outer peripheral surface of a first circular spline; and a linear-actuation cylinder threaded onto the lead screw, a linear-actuation cylinder 4 having a screw groove that is formed in an inner peripheral surface thereof. It is possible to obtain a linear-actuation mechanism whose holding force during reverse input mode (speed…
Robot hand and finger mechanism
Granted: May 1, 2012
Patent Number:
8167345
A robot hand converts the longitudinal extending and retracting motion of an actuating rod of a linear actuator into opening and closing motion of left and right first links via a link mechanism. The link mechanism includes left and right middle links composed of coil springs. When the left and right first links come in contact with an object to be gripped, the middle links elastically deform and expand, and the force gripping the object gradually increases due to the elastic deformation…
H.264/AVC based approach to scalable video compression
Granted: May 1, 2012
Patent Number:
8170121
A scalable video compression method and apparatus for encoding an input frame sequence having temporally sequential frames includes partitioning each of the frames of the input frame sequence into a top field and a bottom field to form a base layer sequence of fields and an enhancement layer sequence of fields. The base layer sequence and the enhancement layer sequence each comprise temporally alternating top and bottom fields of the partitioned frames of the input frame sequence. The…
