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Match Document Document Title
7391009 Angle-measuring system having irregular reference mark that is dedicated without time delay  
An angle-measuring system comprising at least one transmitter provided with a number of complementary signal-generating elements disposed in pairs and creating a pattern of signals. The elements...
7385178 Reflective encoders with various emitter-detector configurations  
Optical encoders having one or more of a number of disclosed features are disclosed. The features of the optical encoder in accordance with the present invention include a symmetrical (for example,...
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...
7381942 Two-dimensional optical encoder with multiple code wheels  
An exemplary Two-Dimensional Optical encoder (“2-D Encoder”) described herein includes a light emitter and a light detector array. The light detector array includes at least one band of light...
7378643 Optical projection encoder with patterned mask  
An Optical Projecting Encoder (“OPE”) having an emitter module for transmitting emitted optical radiation through a mask to a moving object, and a detector module for receiving reflected...
7377435 Optical encoder  
An optical encoder is disclosed, in particular, which has a light sensing element with light-sensing cells arranged in a matrix. The light sensing element repeatedly detects the same reflective...
7368705 Absolute encoder employing linked sub-encoders and beat track  
An absolute encoder employs multiple sub-encoders of different resolutions and a linking algorithm for combining the sub-encoder outputs to form an accurate, high-resolution position estimate. The...
7365304 Angular position measuring device having a movable stop element to limit the axial spring motion between a maching part and a second assembly and measuring system having such an angular position measuring device  
An angular position measuring device includes two assemblies. The first assembly is rotatable with respect to the second assembly about an axis. A coupling is arranged at the second assembly, which...
7359826 Method and device for detection of oscillations by a position measuring system  
A method for detecting the angular change of a scanning device with respect to at least one scale of a position measuring system by detecting several angular positions of the scanning device in...
7358865 Optical encoder and apparatus using optical encoder  
An optical encoder includes a cylindrical reflective scale, a point light source for irradiating the reflective scale, and light-receiving elements for receiving the light beams reflected by the...
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...
7358480 System and method for re-synchronizing an access barrier with a barrier operator  
A system for re-synchronizing an access barrier with a barrier operator comprises an access barrier, and a barrier operator to profile and monitor the manual and automatic movements of the access...
7358479 Method and computed tomography gantry for measurement of rotation angle of rotor  
In a gantry for an x-ray computed tomography apparatus with a rotor and a stator and a device for measurement of the rotation angle as well as a method for measurement of the rotation angle, a disc...
7355165 Optical encoder and method for using same  
An optical encoder, a system and a method for outputting a signal are provided. The optical encoder and the system have a shaft extending from an interior of a housing. A circuit board having a...
7348547 Position detecting apparatus and image processing apparatus provided with the same  
There is provided a position detecting apparatus that has a high ability of detecting a correct position even if there is mechanical play in a moving mechanical member, a position of which is...
7348546 Position measuring system with a scanning unit having a reference pulse signal detection unit  
A position measuring system having a scale that includes an incremental graduation track, which extends in a measuring direction, the incremental graduation track having a periodic arrangement of...
7348545 System and method for optical encoding on two opposed surfaces of a pattern medium  
An optical encoder system is disclosed with a single pattern medium having a first coded pattern disposed on the first side, a second coded pattern disposed on the second side, a first optical...
7348544 Optical encoder with discontinuous optical grating  
An optical encoder includes a light-emitting unit, a scale with a discontinuous part, and a plurality of light-receiving elements arranged in relationship to a pitch of the scale. In the optical...
7348543 Optical encoder with hollow light guide for indicating the angular position of a rotary shaft  
An optical encoder assembly and a method for measuring a rotation angle in which optical beams are spread over the circumference of a rotating optical disk by means of optical guides (OG). In the...
7345273 Integrated optical encoder  
A rotary switch including a control element, a light-emitting device arranged on a printed circuit board and configured to emit light, and at least two receivers arranged on the printed circuit...
7345272 Optical decoder systems and corresponding methods  
The present invention is generally directed toward optical encoder systems and corresponding methods. One aspect of the invention is directed toward an optical encoder system that includes an...
7339158 Rotary encoder  
A rotary encoder is clamped coaxially with its pickup shaft ( 14 ) on a drive shaft ( 12 ) which is to be measured. Two collet chucks are provided for this purpose. The one collet chuck is...
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...
7332708 Optical encoder  
In an optical encoder, a plurality of light sources is controlled on and off so as to use light rays to irradiate an optical grating of a scale from a plurality of different directions. The light...
7330326 Recordable disk rotational speed error correction circuit  
An error correction circuit for determining an error in rotational speed of a recordable disk of a disk drive includes a sinusoidal error calculation portion adapted to generate a true oscillation...
7329859 Photoelectric encoder  
A photoelectric encoder that has a lens optical system including a lens inserted between a main scale and a light receiving element. In the photoelectric encoder, three planes extended from a...
7329858 Optical encoder and electronic equipment having same  
An optical encoder includes a mobile object having a plurality of aligned slits, a light-emitting portion for emitting light toward the mobile object, and a light-receiving portion 103 for...
7326918 Optical position sensor architecture for servo systems  
System and method for an optical position sensor architecture for use in servo systems. A preferred embodiment comprises a light source configured to produce a light with an intensity dependent...
7321113 Precision material-handling robot employing high-resolution, compact absolute encoder  
An absolute encoder employs multiple sub-encoders of different resolutions and a linking algorithm for combining the sub-encoder outputs to form an accurate, high-resolution position estimate. The...
7317183 High performance reflectivity optical encoder with a protrusion between lenses  
An optical encoder includes an emitter, a first lens, a detector, a second lens, and a protrusion. The emitter emits light which is directed by the first lens to a code scale for reflection. The...
7312436 Optical position measuring system with a detector arrangement and measuring graduation to produce partial filtering of undesired harmonics  
An optical position measuring system that includes a measuring graduation and a scanning unit that is movable in relation to the measuring graduation in a measuring direction. The scanning unit...
7306239 Height control system and sensor therefor  
A sensor for a height control system uses a transducer to detect changes in position of an arm relative to a vehicle and sends a proportional signal to a microprocessor that, in turn, actuates a...
7304295 Method and system of detecting eccentricity and up/down movement of a code wheel of an optical encoder set  
A system and method of measuring a rotational motion of a code wheel measures a rotational movement of the code wheel including an error component due to a non-rotational movement of the code...
7304294 Reflective encoder with reduced background noise  
An encoder having a code scale and an emitter detector module is disclosed. The code scale includes alternating reflective and opaque stripes. The emitter-detector module includes a light source...
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...
7301141 Photoelectric encoder and electric device provided with the same  
A photoelectric encoder of the invention is furnished with a light-emitting element and a light-receiving element for sending and receiving light that are disposed in opposition to one another, and...
7301140 Scanning device for scanning a scale graduation, and position measuring system utilizing the same  
A scanning device for scanning a scale graduation for detecting relative movements of the scanning device with respect to the scale graduation. The scanning device includes a first primary sensor...
7291831 Method and apparatus for automatic modulation of photo-emitter brightness in an optical encoder  
A code strip, an optical encoder using such a strip and a method thereof are described. The code strip includes a calibration area. Light transmitted from a light source through the calibration...
7285769 Optical encoder with reduced reflected light error having a light non-transparent portion with inclined surfaces  
In an optical encoder comprising an optical scale in which a light transmission portion and a light non-transparent portion are arranged and an output pattern obtained by emitting an incident light...
7282699 Optical encoder for improved detection of the absolute position of an origin point  
Two detection heads are arranged opposite to each other with respect to a scale. On the scale, there is provided a discontinuous portion formed in a reflecting portion to enable detection of...
7280049 Encoder runout error correction circuit  
A novel encoder system adapted for use in print architecture at least includes: a codewheel coupled to a rotating print architecture element; a first encoder sensor mounted at a first position...
7279674 Optical encoder module  
An optical encoder module is employed to detect light modulated by a moveable member (e.g., code wheel). The optical encoder includes an emitter having a light-emitting element, and a transparent...
7276686 Method and device for detecting the opening angle of the shutter of an adjustable rotating shutter in a film camera  
The invention relates to a method and a device for detecting the opening angle of the shutter (light or dark sector) of an adjustable rotating shutter ( 1 ) arranged in a film camera. Said shutter...
7271920 Position-measuring device  
A position-measuring device includes: a measuring graduation provided on a material measure going around in ring-like fashion; a scanning unit for optically scanning the measuring graduation using...
7265338 Photoelectric encoder using an incoherent semiconductor light source  
A photoelectric encoder is provided, which emits light from a light source to a main scale and an index scale that can relatively move with respect to each other and obtains a light-receiving...
7265337 Sensing apparatus  
Motion sensing apparatus including at least one light sensitive electronic component, said component responsive to at least a first and second incident light level each level creating in said light...
7265336 Encoder utilizing a reflective cylindrical surface  
An encoder for measuring the position of a rotating shaft is disclosed. The encoder includes a drum having an encoding track thereon and a detector module having a light source and a photodetector....
7256391 Encoder for detecting a position of a detection target  
A plurality of analog signals are detected in a sensor in accordance with a displacement of a scale on which a pattern with a predetermined cycle is formed. The plurality of analog signals are...
7253395 Absolute encoder employing concatenated, multi-bit, interpolated sub-encoders  
An absolute encoder employs multiple sub-encoders of different resolutions and a linking algorithm for combining the sub-encoder outputs to form an accurate, high-resolution position estimate. The...
7252018 Drive for closure elements  
A drive for closure elements is provided, in particular in the area of garage and industrial doors, but also for example in the form of roller shutters, with a reference value generator arranged in...
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