| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 341111000 | PHASE OR TIME OF PHASE CHANGE | 21 |
| 20100097251 | BALANCED ROTATOR CONVERSION OF SERIALIZED DATA - A method, system, and apparatus of a balanced rotator conversion of serialized data are disclosed. In one embodiment, a method to convert serialized data includes acquiring a rotator module output, and generating a balancing signal with a reference module, which operates with a reference frequency. The method further includes processing the rotator module output and the balancing signal in an interpolation module to generate a balanced rotator output. The method may include a rotator module output that is generated by an analog phase rotator when a control voltage is received by the analog phase rotator. The reference module may include an other analog phase rotator to generate a balancing signal. The interpolation module may interpolate the balancing signal and the rotator module output to modulate a phase of the balanced rotator output. The balanced rotator output may include an orthogonal output. | 04-22-2010 |
| 20100214139 | Interpolation Accuracy Improvement in Motion Encoder Systems, Devices and Methods - Disclosed are various embodiments of interpolation circuits for use in conjunction with optical encoders. The analog output signals provided by incremental or absolute motion encoders are provided to an interpolation circuit, which is capable of providing high interpolation factor output signals having high timing accuracy. The disclosed interpolation circuits may be implemented using CMOS or BiCMOS processes without undue effort. | 08-26-2010 |
| 20110018748 | Systems and Methods for Two Tier Sampling Correction in a Data Processing Circuit - Various embodiments of the present invention provide systems and methods for data processing. For example, a data processing circuit is disclosed that includes an analog to digital converter, a digital interpolation circuit, a phase error circuit, and a phase adjustment control circuit. The analog to digital converter samples an analog data input at a sampling phase governed at least in part by a coarse control, and provides a series of digital samples. The digital interpolation circuit interpolates between a subset of the series of digital samples based at least in part on a fine control. The phase error circuit calculates a phase error value. The phase adjustment control circuit is operable to determine the coarse control and the fine control based at least in part on the phase error value. | 01-27-2011 |
| 20140085116 | THREE-FREQUENCY PHASE DIGITIZING SYSTEM AND METHOD OF THREE-PHASE DIGITIZING AN INTERFEROMETER SIGNAL USING THE SAME - A phase digitizing system includes an analog-to-digital converter (ADC), multiple phase accumulators and a processing device. The ADC generates sample segments of digital signal waveform samples based on an analog composite input signal received in a measurement channel, the composite input signal includes a first signal having a first frequency F1 and a second signal imported from a reference channel having a second frequency F2. The processing device is coupled to the phase accumulators, and digitally processes each sample segment with outputs of the phase accumulators, and continually generates digital phase data The processing device further provides increment values to each of the phase accumulators based on the digital phase data, causing an output of a first phase accumulator to represent an instantaneous phase of the first signal, and an output of a second phase accumulator to represent an instantaneous phase of the second signal. | 03-27-2014 |
| 341112000 | Synchro or resolver signal | 17 |
| 20120019404 | METHOD FOR OPERATING AN ELECTROMECHANICAL ACTUATOR - A method is provided for operating an electromechanical actuator comprising a movable element, a position sensor for detecting the position of the movable element, a logic unit connected to the position sensor, and exactly one output line for the logic unit to transmit a pulse width modulated (PWM) signal having a predetermined frequency value, the method providing for the logic unit to perform detecting a position of the movable element, determining a value of a duty cycle of the pulse width modulated (PWM) signal on the basis of the detected position of the movable element, and transmitting a pulse width modulated (PWM) signal indicative of the position of the movable element having the determined value of the duty cycle. | 01-26-2012 |
| 341113000 | Coarse and fine | 2 |
| 20110187567 | Phase Digitizing Apparatus and Method Thereof - A phase digitizing apparatus for generating a corresponding digital value in response to a phase of an input signal is provided. The phase digitizing apparatus includes a coarse phase generator, for generating a coarse phase code according to the phase of the input signal and a first time unit; a fine phase code generator, for generating a fine phase code according to the phase of the input signal and a second time unit; and a calculating unit, for generating the digital value according to the coarse phase code and the fine phase code; wherein the first time unit is greater than the second time unit. | 08-04-2011 |
| 20120044101 | Method for an enhanced incremental-absolute position sensor system - A pseudo-absolute position of a rotating axis is sensed at a desired resolution by employing a single absolute encoders of a resolution that is lower than the desired resolution in combination with a home position sensor that is activated by a home position actuator attached to the axis. The home position sensor and actuator provide an initial count and context of absolute encoder rotations about the axis. Whereas the absolute encoder data is utilized directly for the lower bits of the enhanced position data, overflows and underflows of the absolute encoder data are utilized for the purpose of counting the absolute encoder rotations wherein the rotation count forms the upper bits of the enhanced position data. Additionally, the data from the absolute encoder can be manipulated so as to make a mechanical misalignment between the encoder, the home position sensor and actuator essentially inconsequential to the operation and accuracy of the enhanced incremental-absolute position sensor system. | 02-23-2012 |
| 341116000 | Analog resolver or synchro signal to digital signal | 14 |
| 20080218391 | Tracking loop type digital angle converter and angle/digital converting apparatus - A tracking loop type digital angle converter that operates so that a deviation between input and output angles always becomes zero by feeding back the output angle to the input angle, wherein in order to eliminate a case where a control deviation decreases an angle error between the input and output angles is in the vicinity of 180°, i.e., where response becomes low, there are provided a detected signal sign judging section ( | 09-11-2008 |
| 20080309527 | Resolver - A resolver includes an excitation signal generator which generates a sine wave and a cosine wave as an excitation signal, a rotor which receives the excitation signal, and a rotary transformer which detects an output signal of the rotor, the resolver being arranged to detect angle information of the rotor. The resolver further includes a controller which outputs angle information at a zero cross point of the output signal detected by the rotary transformer. The resolver can provide high detection accuracy and be low in cost. | 12-18-2008 |
| 20090160687 | R/D converter and angle detecting apparatus - A band elimination filter | 06-25-2009 |
| 20110037627 | Modular Units for Synchro-to-Digital Conversion and Digital-to-Synchro Conversion - The inventive data conversion device is typically embodied as a modular unit including a PCBA and a frame that houses it. The PCBA includes a PCB and electronic components mounted thereon including a computer and one or more conventional conversion devices, viz., at least one conventional synchro-to-digital converter and/or at least one conventional digital-to-synchro converter. According to typical inventive synchro-to-digital conversion, analog synchro data (received from a synchro) is converted by the synchro-to-digital converter(s) to lower-level-format parallel-binary-angle digital synchro data, which in turn is converted by the computer to higher-level-format digital synchro data. According to typical inventive digital-to-synchro conversion, higher-level-format digital synchro data (received from a modern-day digital device/system/network) is converted by the computer to lower-level-format parallel-binary-angle digital synchro data, which in turn is converted by the digital-to-synchro converter(s) to analog synchro data. | 02-17-2011 |
| 20110057821 | APPARATUS AND METHOD FOR SENSING ROTOR POSITION AND ELECTRIC POWER STEERING SYSTEM USING THE SAME - Disclosed are an apparatus and method for sensing a rotor position, and an electric power steering system using the same. The rotor position sensing apparatus includes: an absolute position sensor for sensing absolute position information for a rotor; a pulse generator for generating increment pulses with a predetermined period; a rotor position estimating unit for calculating the rotor position using the absolute position information and the number of the increment pulses counted in synchronization with the absolute position information at the time of sampling, wherein the rotor position estimating unit re-calculates the calculated rotor position by adding one or more increment values to the number of the increment pulses if the number of the increment pulses equals to the number of increment pulses at the time of just previous sampling; and an output unit for generating a signal having information concerning the calculated rotor position or the re-calculated rotor position, wherein the increment value is proportional to the rotor rotation speed and the sampling period. | 03-10-2011 |
| 20110057822 | PULSE GENERATING DEVICE, ROTATOR MODULE, ROTATIONAL SPEED CONTROL DEVICE, AND IMAGE FORMING APPARATUS - A pulse generating device includes a rotatable disc having a plurality of patterns that are formed on a surface of the rotatable disc in a circumferential direction of the rotatable disc, and three pulse generators to each detect the plurality of patterns formed on the rotatable disc and to respectively generate three pulse signals each corresponding to a rotational speed of the rotatable disc based on the detected patterns. The three pulse generators are evenly spaced at intervals of 120 degrees of angle with respect to a rotational axis of the rotatable disc in the circumferential direction of the rotatable disc. | 03-10-2011 |
| 20110063145 | Multiturn Rotary Encoder and Method of Operating a Multiturn Rotary Encoder - A multiturn rotary encoder includes: a single-turn unit, including a code carrier and a single-turn evaluation unit for processing single-turn position signals to form a single-turn code word; a first multiturn unit, including at least one first multiturn code carrier and a first multiturn evaluation unit for processing first multiturn position signals to form a first multiturn code word that indicates the number of revolutions covered by input shaft; and a second multiturn unit, including at least one second multiturn code carrier and a second multiturn evaluation unit for processing second multiturn position signals to form a second multiturn code word that likewise indicates the number of revolutions covered by the input shaft. The functioning of the multiturn units is ascertainable by the multiturn code words generated independently of each other. | 03-17-2011 |
| 20110068960 | MINIMIZING MAGNETIC INTERFERENCE IN A VARIABLE RELUCTANCE RESOLVER - A resolver apparatus and method are provided. The apparatus comprises a source generation unit for generating a uni-phase source signal to excite a resolver, wherein said source generation unit comprises a low distortion oscillator, a variable phase shifter, and a capacitive resolver driving network; and a signal output unit for generating a two-phase output signal, wherein said signal output unit comprises the resolver, a signal detector and level adjuster, an angular position measurement unit, and an angular position compensation unit. The method comprises generating a source signal to excite a resolver; transmitting the source signal through a variable phase shifter; transmitting the source signal through at least one capacitive passive element serially connected to each coil winding of the resolver; outputting a displacement signal generated by the resolver to a resolver-to-digital converter; and converting said displacement signal into a digital position using the resolver-to-digital converter. | 03-24-2011 |
| 20110090104 | DIGITAL CONVERTER FOR PROCESSING RESOLVER SIGNAL - According to one embodiment, a digital converter is provided to process output signals of a resolver attached to a rotating apparatus. These output signals are converted into digital signals by ΔΣ AD converters. Multiplication units receive the digital signals outputted from the ΔΣ AD converters. A subtraction unit subtracts the outputs of the multiplication units. A synchronous detection unit detects the output of the subtraction unit based on a synchronization signal synchronously. An angular velocity calculation unit adjusts a proportional gain of an output of the synchronous detection unit, compensates the phase thereof, and calculates the angular velocity of the rotating apparatus. A rotational angle calculation unit calculates a rotational angle by integrating the angular velocity. Cosine and sine output units output a cosine and a sine corresponding to the obtained rotational angle to the multiplication units, respectively. | 04-21-2011 |
| 20110102214 | ROTATION ANGLE DETECTING DEVICE AND DRIVE UNIT - A rotation angle detecting device for a motor includes a first capacitor connected in parallel with a first winding of a rotor of the motor, and a second capacitor connected in parallel with a second winding of the rotor. The second capacitor has a capacitance different from that of the first capacitor. A rotation angle calculator of the rotation angle detecting device counts a number of amplitude changes of current detected by a current detector. The rotation angle calculator increases or decreases a value of the counting in accordance with a rotation direction detected by a rotation direction detector. | 05-05-2011 |
| 20110133965 | ANGLE DETECTION DEVICE AND METHOD OF MANUFACTURING THE SAME - An angle detection device of the present invention includes: a stator which includes a plurality of salient pole portions which are formed on a flat sheet made of a magnetic material and are raised by bending, each salient pole portion constituting a winding magnetic core on which a winding member for excitation and a winding member for detection are mounted; and a rotor which is made of a magnetic material and is provided rotatably relative to the stator such that gap permeance between the rotor and each salient pole portion is changed due to the rotation of the rotor about a rotational axis of the rotor. According to the angle detection device of the present invention, it is possible to provide the angle detection device which can largely reduce the number of parts and can realize the reduction of cost and the enhancement of reliability. | 06-09-2011 |
| 20110304488 | FILTER FOR THE SUPPRESSION OF NOISE IN RESOLVER-TO-DIGITAL CONVERTERS - A system and method for reducing noise in resolver-to-digital converters (RDC) using a cascaded tracking loop filter. In some embodiments, one or more tracking loop filters may be implemented in a cascade to attenuate carrier harmonic frequencies in the digitized output of an RDC. Where a plurality of tracking loop filters are implemented, the output of one tracking loop filter may be input into a successive tracking loop filter. | 12-15-2011 |
| 20140253349 | WINDOW-ENABLED TIME-TO-DIGITAL CONVERTER AND METHOD OF DETECTING PHASE OF A REFERENCE SIGNAL - A window-enabled TDC and method of detecting phase of a reference signal. One embodiment of the window-enabled TDC includes: (1) a window generator configured to receive a reference signal and a clock signal, and (2) a TDC circuit coupled to the window generator and configured to be enabled based on the reference signal and disabled based on the clock signal. | 09-11-2014 |
| 20150097709 | RESOLVER-TO-DIGITAL CONVERTER - According to one aspect, a resolver-to-digital converter includes a first filter configured to receive a first delta-sigma modulated resolver input. A second filter is configured to receive a second delta-sigma modulated resolver input. A summing junction is configured to output a difference between a scaled output of the first filter and a scaled output of the second filter. A controller is configured to generate a controller output based on a product of a demodulator and an output of the summing junction. An integrator is configured to generate an estimated position based on the controller output. The resolver-to-digital converter also includes a compensator configured to generate a compensated estimated position based on the controller output and a compensation offset delay adjustment. | 04-09-2015 |
