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| Number | Title | Issue Date |
| 7834310 | Position encoder's signal processing method and system An encoder position signal processing system comprises an analog encoder reader and a codewheel. The codewheel possesses an optical track that modulates the quadrature encoder signal amplitude in order to generate an amplitude change (home pulse) once per revolution... | 11/16/2010 |
| 7449678 | Optical encoder having reference position detection A photodetector group includes a plurality of photodetector elements which are arranged one-dimensionally in a direction of movement of a scale. An optical encoder includes a differential signal calculating member which calculates a first differential signal of an o... | 11/11/2008 |
| 7435946 | Mark detector using multiple light beams for use in a displacement detector and an image forming apparatus A mark detector to detect a plurality of marks which are arranged in a predetermined cycle on a moving member, such as a photo conductor belt, a transfer belt, a paper conveyance belt, a photo conductor drum, a transfer drum, etc. especially in an image forming appa... | 10/14/2008 |
| 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 an optical sensor including a photo-detector receiving the light fro... | 07/15/2008 |
| 7391012 | Apparatus for detecting rotational angle of rotational element and detecting method thereof An apparatus (100) for detecting rotational angle of a rotational element (110), includes a light emitting element (1) and an image detecting element (3). The light emitting element is disposed on the rotational element to emit light. The... | 06/24/2008 |
| 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 create a reference mark irregularly configured at least at one spot. A ... | 06/24/2008 |
| 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 is provided with markings that rotate relative to a detection device... | 04/15/2008 |
| 7350617 | Method for mounting a steering angle and steering torque sensor and steering gear including a steering angle and steering torque sensor A method for mounting a steering angle and steering torque sensor to a steering has the following steps: At first, there is provided a steering angle and steering torque sensor which includes a housing and a rotor. Then, the rotor and the housing are rotated through... | 04/01/2008 |
| 7291832 | 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 disclosed which is adapted to receive one or more laser beams and provide an output... | 11/06/2007 |
| 7254992 | Rotation-sensored rotary connector A rotation-sensored rotary connector includes: a rotary connector for electrically connecting an electrical component installed on a steering to a vehicle-body side; and a rotation sensor for detecting a rotational angle of the steering; wherein the rotation sensor ... | 08/14/2007 |
| 7202468 | Power transfer device with contactless optical encoder and color reflective surface An angular offset sensing device includes an optical encoder having a light generating element and a light sensor. An armature includes a reflective surface having a generally semicircular shape and a spectrum of color disposed thereon varying from a first end of th... | 04/10/2007 |
| 7158690 | Enhancing the resolution of measurement systems employing image capturing systems to measure lengths Two scales having unequal pitches are used to measure lengths with a greater resolution than that offered by an image capturing system operating alone. In an embodiment, the different pitches are attained by having bands of unequal width in the two scales. Images re... | 01/02/2007 |
| 7138623 | Power transfer device with contactless optical encoder and color reflective surface An angular offset sensing device includes an optical encoder having a light generating element and a light sensor. An armature includes a reflective surface having a generally semicircular shape and a spectrum of color disposed thereon varying from a first end of th... | 11/21/2006 |
| 7135673 | Imaging rotation angle absolute encoder An angle absolute encoder comprises an encoded code rod that has code marks, such as pairs of fine code lines and coarse code lines. Light is reflected from or transmitted through the code marks and detected by a light detector to determine absolute angle position. | 11/14/2006 |
| 7126107 | Methods and apparatuses for sensing rotational position of a component in a printing device An encoder and related methods for use in a printing device indexing system are provided. In some embodiments, the system comprises a feedroller or other component configured to index media through a printing device, and an encoder disk is coupled to the feedroller.... | 10/24/2006 |
| 7091474 | Rotation angle detecting device A rotation angle detecting device includes a housing which is constituted by a combination of a case and a cover; a resistance board; a code wheel; a slider rotating plate; a slider; a circuit board; signal detecting elements; and a gear which transmits the rotation... | 08/15/2006 |
| 7085638 | Steering angle sensor assembly including reduction gear and logic module A steering angle sensor assembly is for use with a vehicle having a rotatable steering mechanism. The assembly includes a first rotational indexing member operably couplable to the steering mechanism for rotation therewith. The steering mechanism and the first index... | 08/01/2006 |
| 7064787 | Method and apparatus for adjusting sweep-out frequency for an imaging apparatus responsive to an operating state of a strobo means An operating condition judging means judges at least one of consumed current, whether or not a mechanically driven part is being operated, the supply voltage level, the ambient temperature, whether or not the lens stop device is operative, whether or not the strobo ... | 06/20/2006 |
| 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 receive one or more laser beams and provide an output laser beam encode... | 05/16/2006 |
| 7021161 | Gear bearing for a steering wheel position sensor An improved conventional steering wheel position sensor including a housing, a main gear, an auxiliary gear enmeshed with the main gear and a ring shield at the auxiliary gear. A ring shield wall of the ring shield has a low rise portion adjacent the main gear and a... | 04/04/2006 |
| 7011248 | Encoder arrangement An encoder arrangement is described, consisting of a motor with a motor shaft, on which a timing disk is secured, a signal source for producing an optical signal as well as a beam mask for shaping the optical signal. The arrangement is characterized in that the beam... | 03/14/2006 |
| 7012510 | Device and method for adjusting view range of vehicular monitoring device A device for adjusting a view range of a vehicular monitoring device includes a vehicle status detector mounted on a turning portion of a vehicle for detecting a turning degree of the turning portion, and outputting an adjusting signal associated with the turning de... | 03/14/2006 |
| 6992278 | Homing process The present invention relates to a method for determining a home position by means of a home position mark on a special microfluidic device type used in a microfluidic system. The method for determining a home position by means of a home position mark on a microflui... | 01/31/2006 |
| 6946648 | Opto-electronic device for angle generation of ultrasonic probe A system for accurately sensing/determining the position of an uniformly rotating shaft characterized in using a single marker in tandem with a high frequency signal, said system comprising a shaft mounted with a disc having a single marker, an opto-electronic devic... | 09/20/2005 |
| 6895069 | Apparatus for counting rotation frequency of numeral wheel of meter for remote meter reading system Disclosed is an apparatus for counting the rotation frequency of a numeral wheel of a meter to be used for a remote metering system. A light reflection tape is coated on one of low placed numeral wheels. A light sensor unit has an opaque case formed with first and s... | 05/17/2005 |
| 6873264 | Method and apparatus for detecting angular phase difference A rotational phase difference detecting system, a method that is capable of very accurately detecting a rotational phase difference between a plurality of rotating bodies, a machine operating-state monitoring system, and a method employing the rotational phase diffe... | 03/29/2005 |
| 6844542 | Marked plate for a rotational angle sensor element, an angular sensor element for rotating structural parts, and a process for determining a reference value The invention involves a marked plate for a rotational angle sensor element for rotating structural parts, with many angle marks provided preferably oriented radially to the rotational axis and preferably arranged in the form of a collar arranged concentrically to t... | 01/18/2005 |
| 6839051 | Two-axis cursor control apparatus A two-axis ball-based cursor control apparatus is provided, which includes a housing; a spherical ball contained partially within the housing; two rotors in contact with the spherical ball and two corresponding axles; two screw devices associated with each rotor-axl... | 01/04/2005 |
| 6563108 | System for tracking angular and linear motion The invention provides a system for sensing angular motion. The system includes a light source, a transducing member, and a modulating member having a track of translucent and opaque regions positioned between the light source and the transducing member. ... | 05/13/2003 |
| 6525309 | Optoelectronic sensor An optoelectronic sensor has a light source (10) for the transmission of a scanning beam (11), a light deflection unit (12), which is formed for the periodic deflection of the scanning beam (11) within an angular transmitting range (14), a receiving devic... | 02/25/2003 |
| 6465773 | Optical measurement module for measuring angles and/or distances An optical angle and/or distance measurement module for measuring its position with respect to a scale embodiment contains a device for light detection and a device for imaging part of the scale embodiment on the light detection device. In addition, the m... | 10/15/2002 |
| 6420697 | Steering angle sensor A steering wheel angle sensor includes first and second sensors, a differential gear, and a detector. The first sensor determines steering wheel angular position within one revolution and the second sensor determines number of steering wheel revolutions. ... | 07/16/2002 |
| 6380536 | Rotation angle detector for detecting a rotational position of a steering wheel of a vehicle The present invention aims at providing a rotation angle detector capable of detecting and storing information for a direction and an angle of rotation of steering wheel while maintaining a condition of reduced power consumption from a battery, when an en... | 04/30/2002 |
| 6323786 | Absolute-value encoder device An absolute-value encoder device for detecting a plurality of rotation quantities is disclosed. An A/B phase forming portion 610 forms an A-phase pulse signal and a B-phase pulse signal, based on light passing through a slit rotating together with a rotar... | 11/27/2001 |
| 6057976 | Apparatus for detecting rotational displacement information of a rotating object An angular division apparatus for circumferentially dividing a rotating object into a plurality of areas by using Doppler pulses includes an optical head for applying a beam emitted from a light source unit to a rotating object and detecting Doppler pulse... | 05/02/2000 |
| 6043483 | Apparatus and method using an indexed-encoder to sense the absolute position of an object with a single set of optics An apparatus and method for detecting the absolute position of a movable member, by monitoring the incremental and directional of movement of an indexed-encoder, coupled to the movable member, and comprising a single index space and a plurality of non-ind... | 03/28/2000 |
| 6028304 | Precision displacement reference system A precision displacement reference system is described, which enables real time accountability over the applied displacement feedback system to precision machine tools, positioning mechanisms, motion devices, and related operations. As independent measure... | 02/22/2000 |
| 5939713 | Optical sensing system using two sensors to generate position signals The present invention discloses an optical sensing system which utilizes two sensors to detect positioning holes or an identification hole of a grid panel. The optical sensing system comprises a wheeled shaped grid panel, a sensing device and a control ci... | 08/17/1999 |
| 5929789 | Single channel incremental position encorder with incorporated reference mark A position encoder system is provided, the system employing a medium having a track with incremental markings which define an embedded reference position identifier. Upon movement of the medium, a sensor detects passage of the incremental markings, each s... | 07/27/1999 |
| 5900930 | Angle sensor using a multi-pixel optical device An angle sensor for detecting the angular position of a rotating body. The angle sensor includes a plurality of digital patterns positioned on a surface that rotates with a rotating body. A source of light illuminates the patterns, and a multi-pixel optic... | 05/04/1999 |
