Matches 1 - 50 out of 400 1 2 3 4 5 6 7 8 >
Match Document Document Title
7619537 Signal processing circuit for encoder  
In an encoder which is equipped with two detectors arranged on both sides of a rotating shaft in order to eliminate an eccentricity error, the mounting of the detectors is facilitated by making...
7612327 Optical encoder and electronic equipment having the same  
An optical encoder of the invention has an OR circuit 21 to which light reception signals A+, B+ are inputted, an OR circuit 22 to which light reception signals A−, B− are inputted, and an...
7612326 Angle-calculation apparatus and angle-calculation method for three-phase optical encoder  
An angle-calculation apparatus for three-phase optical encoder receives three-phase sinusoidal signals 120 degree phase from the optical encoder and obtains angle information for a motor rotor. The...
7552873 Transmissive optical encoder  
In one embodiment, an optical encoder includes a light source, a detector array and a code member. The detector array is positioned in spaced-apart relation to the light source and includes at...
7550711 Encoder for a printer motor and a printer using the same  
A light emitter is operable to emit light. A scale comprises a transparent main body and a plurality of marks. The transparent main body has a first face and the second face which is opposite to...
7550710 Scale and readhead apparatus  
Apparatus for determining angular alignment of a readhead with respect to a scale. The apparatus comprises a scale and readhead. The readhead has at least one sensor which produces an output which...
7511260 Encoder device for detecting movement  
An encoder device includes first through fourth photodiodes each having a rhombus shape and a length of X 1 in an X direction, the photodiodes being disposed adjacent to each other in the X...
7485845 Photoelectric encoder capable of effectively removing harmonic components  
A three-grating type photoelectric encoder includes a second grating formed on a scale and first and third gratings disposed on a side of a detector. A part of at least the first grating is shifted...
7465917 Absolute encoder utilizing light of different wavelengths to reduce cross-talk  
An encoder having a code scale, an illumination system, and a plurality of photodetectors is disclosed. The code scale has a plurality of tracks that are illuminated by the illumination system....
7449675 Photodetector array and codewheel configuration for flexible optical encoder resolution  
An optical encoder includes a coding element having a track with multiple transparent sections, a light source positioned to output light to the track, and a photodetector array, positioned to...
7399956 Optical encoder with sinusoidal photodetector output signal  
An optical encoder includes an optical encoder pattern of alternating light elements and dark elements, and an optical unit, including an optical emitter providing light to the encoder pattern, and...
7400269 Coding element with integrated limit switch  
An optical encoder. The optical encoder includes a coding element, an emitter, and a detector. The coding element has a track with a track pattern. The track pattern includes a plurality of...
7394062 Displacement-measuring optical scale and optical encoder using same  
When a convex lens 13 comes close to 0-th order transmitted light T 0 with rotation of an optical scale 11 , the 0-th order transmitted light T 0 derived from a light beam L emitted from a...
7391010 Photoelectric encoder and electronic equipment with increased resolution  
The photoelectric encoder of the present invention has a light-emitting device and light-receiving devices arranged in one direction in a region that light from the light-emitting device can reach....
7391011 Optical encoder capable of detecting absolute position  
In two phases signals (A, B) outputted from a scale or a scale having a discontinuous portion provided in its incidental member to a light receiving portion, a region in which amplitudes of the two...
7382295 Control unit for electric power steering apparatus  
Since an abnormality is judged by executing a square calculating process with respect to sin θ and cos θ for detecting an abnormality in an angular resolver, a processing time is elongated, and a...
7358481 Reflective encoder with three-dimensional code carrier  
An encoder having a code pattern on a carrier and an emitter detector module is disclosed. The code pattern includes alternating reflective and opaque regions on a carrier that includes a planar...
7332709 Photoelectric encoder  
A photoelectric encoder includes a light source of an illumination light beam. The encoder also includes a movable grating which has grating lines and which is displaceable in a direction...
7332711 Photoelectric encoder, scale therefor and method for manufacturing the same  
A main scale 10 has protrusive grating 12 of a thin film of e.g. Cr formed on a base member 11 . The base member 11 and the Cr thin film constitute a reflecting face which is set to provide...
7301142 Optical encoder photodetector array with multiple resolutions  
A photodetector for an optical encoder has plural sets of segmented photodiodes, each set of which is made by two adjoining segmented photodiodes capable of coping with a scale slit having a...
7297935 Position-measuring device  
A position-measuring device includes: a measuring graduation provided on a measuring standard device arranged around in ring-like fashion; a scanning unit for optically scanning the measuring...
7265339 Encoder interpolation apparatus  
An interpolating detector for generating a position signal indicating a change in the relative position of a code pattern that includes alternating light and dark stripes is disclosed. The...
7247839 Encoder for detecting position or displacement of moving body  
An encoder that can detect the presence of noise occurring within the encoder. The encoder is constructed by incorporating within the same apparatus: a movement detecting unit for detecting the...
7238932 Optical position sensing device  
An optical position sensing device for sensing a two-dimensional displacement, comprising a first photosensor arranged parallel to a first axis; a second photosensor arranged parallel to a second...
7199355 Methods and apparatuses for the exact determination of an angle of rotation  
In a method according to the invention for the accurate determination of an angle of rotation (w) about an axis (a), at least a part of a plurality of pattern elements ( 5, ..., 13 ) arranged...
7193205 Optical encoder with burst generator for generating burst output signals  
A processing apparatus calculates and applies calibrations to sensors that produce quasi-sinusoidal, quadrature signals, using fixed or programmable electronic circuits, a circuit to calculate the...
7187305 Encoder for a motor controller  
An encoder in a motor system measures radial movement and translational movement of a disk with a single integrated sensor disposed on a microprocessor chip. The encoder measures position...
7183535 Position-to-number electro-optical converter  
An optoelectronic code-to-position encoder intended for measuring linear and angular travels of an object contains a coordinate scale with raster and code tracks, a readout unit, which includes a...
7180430 Low-cost absolute linear optical encoder  
A Low-Cost Absolute Linear Optical Encoder (“LALOE”) for determining the absolute position of a read-head within the LALOE relative to a codestrip is disclosed. The LALOE may include an emitter...
7164120 Position measuring instrument  
A method for position measurement that includes scanning a plurality of graduation periods of one incremental graduation by a detector arrangement extending over a length of one measurement range,...
7164482 Position measuring system  
A position measuring system that includes a scale having a measuring graduation extending along a first line and a scanning device. The scanning device includes a light source that transmits light...
7132647 Optical encoder  
A main scale of an optical displacement measuring apparatus has slits arranged on it at regular intervals, a part of which is a missing slit that does not allow light to pass through used for...
7126696 Interferometric miniature grating encoder readhead using fiber optic receiver channels  
An interferometric fiber optic encoder readhead for sensing the displacement of a scale grating is disclosed. The detector channels of the readhead are fiber optic detector channels having...
7126109 Encoder scale error compensation employing comparison among multiple detectors  
An encoder calculates position error values and applies compensation values to encoder position measurements in-situ. The encoder includes a scale and a multi-section detector for detecting a...
7112782 Optical position measuring system  
An optical position measuring system including a scale and a scanning unit. The scanning unit includes a light source that emits light beams and a periodic scanning graduation having scanning...
7105803 Rotary optical encoder  
A rotary optical encoder is described to provide the pole position of the rotor in a permanently magnetized motor. Using a simple opening design of code tracks and two light sensors along with a...
7098446 Photoelectric encoder  
A photoelectric encoder includes an optical receipt chip on which a plurality of photodiodes (PDs) are laid out along a measurement axis “X” so that these are organized into an array. The...
7095925 Optical phased array transmitter/receiver  
An optical phased array transmitter/receiver includes a plurality of waveguides each including an optical fiber and a light source coupled to the fibers in the waveguides. At least one grating is...
7091475 Miniature 2-dimensional encoder readhead using fiber optic receiver channels  
A 2D fiber optic encoder readhead having multiple readhead portions for sensing the two-dimensional displacement of a scale grating is disclosed. The detector channels of the readhead portions are...
7084390 Position-measuring device including measuring graduation and scanning unit  
A position-measuring device includes a measuring graduation extending along a measuring direction, a scanning unit for scanning the measuring graduation, and a detection device of the scanning unit...
7065966 Position control method by motor drive and control unit  
A position control method by motor drive including of rotating a rotor of the motor drive according to the given target opening, and detecting the opening of a movable vane by an encoder, the motor...
7060969 Rotating machine having rotation sensors  
Three rotation sensors circumferentially arranged at 90 degree intervals in a disk code wheel attached to a motor's output shaft respectively output a signal corresponding the rotational speed of...
7057163 Optical position sensing device  
An optical position sensing device for sensing a two-dimensional displacement, comprising a first photosensor arranged parallel to a first axis; a second photosensor arranged parallel to a second...
7053361 Projection encoder with moving side gratings and fixed side gratings  
A projection linear encoder has an SOQ substrate formed with transmission gratings and grid-like photodiode groups, and a reflecting grating plate with reflecting gratings that are formed facing...
7053362 Absolute position miniature grating encoder readhead using fiber optic receiver channels  
An absolute position fiber optic encoder readhead having multiple readhead portions for sensing the displacement of respective scale grating tracks of a scale is disclosed. The detector channels of...
7045769 Optical encoders for position measurements  
Systems and methods are disclosed for providing position measurement information. For example, in accordance with one embodiment of the present invention, a multiple-pitch grating is employed to...
7034948 Displacement pickup  
A displacement pickup is provided which includes a displaceable scale ( 12 ) having defined therein a first area ( 12 a ) where positional information is recorded with a predetermined pitch and a...
7034283 Absolute incremental position encoder and method  
A position encoder uses a track encoded with a pattern of bit-widths in accordance with a sequence. The sequence may be any sequence having unique subsequences, and may be a pseudo-random noise...
7012703 Automatic encoder resolution calibration and length measurement system and method  
The invention is a system and method for automatically determining a resolution of an encoder, automatically calibrating the encoder resolution, and automatically determining a length of a...
6958469 Diffraction grating interference system encoder for detecting displacement information  
A displacement information detector in which a coherent luminous flux from a light source is applied to a diffraction grating scale adapted to be relatively moved to generate two diffracted rays of...
Matches 1 - 50 out of 400 1 2 3 4 5 6 7 8 >