Patent application number | Description | Published |
20090196359 | METHODS AND SYSTEMS TO INSERT FILLER DATA IN UNALLOCATED RESOURCE REGIONS OF A FRAME - In at least some embodiments, a system comprises a first device that prepares a frame for transmission and a second device in communication with the first device. The first device is configured to identify unallocated resource regions in the prepared frame and insert filler data in the unallocated resource regions. | 08-06-2009 |
20090326375 | RECEIVE BEAMFORMER FOR ULTRASOUND - A method of ultrasound receive beamforming includes receiving a first plurality of sensing signals from target tissue, forming a first plurality of digital sensing signals, and data processing the digital sensing signals along a first plurality of data paths to form a first plurality of delayed and apodized digital sensing signals. Data path combining generates data combinations of the delayed and apodized digital sensing signals to include two or more of the delayed and apodized digital sensing signals that originate from different ones of the transducer elements. The data combinations are interpolation filtered using a plurality of interpolation filters to form a second plurality of delayed and apodized digital sensing signals, which are then summed to form an ultrasound receive beamformed signal. The interpolation filters can be interpolation filters in a single shared filter bank, with each interpolation filter providing a different fractional delay. | 12-31-2009 |
20100004542 | SYSTEM AND METHOD FOR ULTRASOUND COLOR DOPPLER IMAGING - Systems and methods for color Doppler imaging in an ultrasound imaging system are disclosed herein. An ultrasound imaging system includes color Doppler imaging circuitry. The color Doppler imaging circuitry is configured to estimate flow parameters. The imaging circuitry includes a radio frequency (“RF”) demodulator configured to produce in-phase and quadrature components of an ultra-sound data vector. The RF demodulator includes a table in memory that stores interleaved sine and cosine values. The RF demodulator maintains an index value for the table having higher precision than is used to index the table. The RF demodulator rounds the index value for each access of the table. Each table access retrieves a sine value and a cosine value. | 01-07-2010 |
20120184855 | Method for Ultrasound Color Doppler Imaging - Methods for color Doppler imaging in an ultrasound imaging system are disclosed herein. Ultrasound radio frequency RF data is demodulated using a nested processing loop including an inner loop and an outer loop. A plurality of Wall filter coefficients are fetched from ultrasound imaging system memory in a single memory access cycle. The plurality Wall filter coefficients are applied to a plurality of complex ultrasound data values in a single execution cycle. The Wall filtered ultrasound data are provided to a flow estimator. | 07-19-2012 |
20120184856 | System for Ultrasound Color Doppler Imaging - Systems for color Doppler imaging in an ultrasound imaging system are disclosed herein. An ultrasound imaging system includes color Doppler imaging circuitry. The color Doppler imaging circuitry is configured to estimate flow parameters. The imaging circuitry includes a radio frequency (“RF”) demodulator configured to produce in-phase and quadrature components of an ultra-sound data vector. The RF demodulator includes a table in memory that stores interleaved sine and cosine values. The RF demodulator maintains an index value for the table having higher precision than is used to index the table. The RF demodulator rounds the index value for each access of the table. Each table access retrieves a sine value and a cosine value. | 07-19-2012 |
20140265952 | Automated Motor Control - Input-output linearization (IOL) and extended state observer (ESO) techniques are applied to a Field Oriented Control (FOC) for Permanent Magnet Synchronous Motors (PMSM). In one such approach, at least one gain value is determined based at least in part on a given bandwidth value. Operating parameters for the motor are determined based on the at least one gain value and information from a current sensor regarding motor current. Control signals used to the control the motor are determined based on the determined operating parameters. Accordingly, automated control can be effected through setting a bandwidth value through the implementation of IOL and ESO techniques. | 09-18-2014 |
20140327379 | POSITION SENSORLESS DRIVE SYSTEM AND METHOD FOR PERMANENT MAGNET MOTORS - A position sensorless drive systems for a permanent magnet motors are disclosed. An embodiment includes a square wave voltage source connectable to an input of a permanent magnet motor. At least one current sensor is connectable to the motor, wherein the current sensor is configured to sense the current in at least one power line to the motor in response to the square wave input to the motor. The position of the rotor relative to the stator may be determined based on the current resulting from the square wave voltage. | 11-06-2014 |
20140327380 | CIRCUITS AND METHODS OF DETERMINING POSITION AND VELOCITY OF A ROTOR - A motor controller includes a square wave voltage generator and adding circuitry for adding the square wave voltage to a first drive voltage that is connectable to the stator windings of a motor. A current monitor for monitoring the input current to the motor as a result of the square wave voltage. A device for determining the position of the rotor based on the input current. | 11-06-2014 |
20140337658 | FREQUENCY EXECUTION MONITORING - A method includes reading first and second timer count values from a timer, wherein the first timer count value is associated with a first time point and the second timer count value is associated with a second time point, calculating a difference between the first and the second timer count values, and determining whether the difference is within a range, wherein the range is based on a desired executing frequency to perform a computing task, a variation of the desired executing frequency, and a timer frequency. Further, based on the difference not being within the range, the method includes setting an error flag value to be true and incrementing an error count value. | 11-13-2014 |
20150194914 | AUTOMATED MOTOR CONTROL - Input-output linearization (IOL) and extended state observer (ESO) techniques are applied to a Field Oriented Control (FOC) for Permanent Magnet Synchronous Motors (PMSM). In one such approach, at least one gain value is determined based at least in part on a given bandwidth value. Operating parameters for the motor are determined based on the at least one gain value and information from a current sensor regarding motor current. Control signals used to the control the motor are determined based on the determined operating parameters. Accordingly, automated control can be effected through setting a bandwidth value through the implementation of IOL and ESO techniques. | 07-09-2015 |
20160066890 | Method for Ultrasound Color Doppler Imaging - Methods for color Doppler imaging in an ultrasound imaging system are disclosed herein. Ultrasound radio frequency RF data is demodulated using a nested processing loop including an inner loop and an outer loop. A plurality of Wall filter coefficients are fetched from ultrasound imaging system memory in a single memory access cycle. The plurality Wall filter coefficients are applied to a plurality of complex ultrasound data values in a single execution cycle. The Wall filtered ultrasound data are provided to a flow estimator. | 03-10-2016 |
Patent application number | Description | Published |
20090175234 | Enhanced Sub-Frame-Based-Framing for Wireless Communications - A method of performing wireless communications. The method comprises, at a transmitting station, encoding a plurality of symbols into a frame. The method further comprises, from the transmitting station, transmitting the frame via a wireless communication to a receiving station. The frame comprises a plurality of sub-frames, wherein a first sub-frame in the plurality of sub-frames consists of a first number of symbols and a second sub-frame in the plurality of sub-frames consists of a second number of symbols. Finally, the first number differs from the second number. | 07-09-2009 |
20100249594 | ITERATIVE TIME DELAY VALUES FOR ULTRASOUND BEAMFORMING - An iterative method of computing time delay values for ultrasound receive beamforming. Sensing signals are generated by transducer elements in a transducer array which detect reflected sound waves from a target tissue region for a time sample (n) for a first focal point and at a later time sample (n+1) for a second focal point. Respective time delays are calculated for time sample (n) for sensing signals received from the transducer elements for focusing the reflected sound waves from the first focal point. For the later time sample (n+1), respective time delays are calculated for the sensing signals received from the transducer elements for focusing the reflected sound waves from the second focal point, wherein the respective time delays for time sample (n+1) are computed iteratively from the respective time delays for time sample (n). | 09-30-2010 |
20100249596 | RECEIVE BEAMFORMER FOR ULTRASOUND HAVING DELAY VALUE SORTING - A method of processing ultrasound signals received from a plurality of data channels each associated with a transducer element. A sorted delay data table having sorted delay data is generated that includes a channel identifier, a fractional delay value, and integer delay value. The sorted delay data table clusters together channel groups including a first channel group having data channels with the first fractional delay value and a second channel group with data channels with the second fractional delay value. Control signals are generated based on the sorted delay data that implements data path combining by directing channel data from the first channel group for processing by a first interpolation filter that provides the first fractional delay value and channel data associated with the second channel group for processing by a second interpolation filter that provides the second fractional delay value. Summing signals output by the first and second interpolation filter forms the ultrasound beamformed signal. | 09-30-2010 |
20110219053 | RECURSIVE TAYLOR SERIES-BASED COMPUTATION OF NUMERICAL VALUES FOR MATHEMATICAL FUNCTIONS - A recursive method for computing numerical values for mathematical functions includes providing a recursive Taylor series representation of a mathematical function f(x) of a variable x evaluated around a given operating point a. The recursive Taylor series representation includes a plurality of derivative derived terms that include ratios of derivatives of f(x) evaluated at the operating point a. Coefficient data is determined from ones of the derivative derived terms stored in a tangible memory device evaluated at the operating point a over a predetermined range. An approximation for the mathematical function f(x) is computed using the recursive Taylor series representation evaluated with the coefficient data. | 09-08-2011 |
20120143059 | DYNAMIC APERTURE CONTROL AND NORMALIZATION FOR APODIZATION IN BEAMFORMING - A method of apodizing for ultrasound beamforming includes providing filtered digital channel data representing echo data from target tissue in a plurality (k) of data channels and a predefined number of active channels (N | 06-07-2012 |
20150084575 | Angle/Frequency Selector in an Electric Motor Controller Architecture - A motor controller architecture and method of operating the same. The motor controller includes a function for estimating the low speed operation of the motor, for example by evaluating the response to a periodic excitation signal injected into the control loop of the controller architecture. A periodic excitation signal in the form of a square wave allows for analysis of the response of the motor without requiring demodulation, which allows the frequency of the excitation signal to be above the audible range. Control logic for controlling the motor at transitional speeds between low speed control and high speed (back emf) control is provided in some embodiments. | 03-26-2015 |
20150084576 | Low Speed and High Speed Controller Architecture for Electric Motors - A motor controller architecture and method of operating the same. The motor controller includes a function for estimating the low speed operation of the motor, for example by evaluating the response to a periodic excitation signal injected into the control loop of the controller architecture. A periodic excitation signal in the form of a square wave allows for analysis of the response of the motor without requiring demodulation, which allows the frequency of the excitation signal to be above the audible range. Control logic for controlling the motor at transitional speeds between low speed control and high speed (back emf) control is provided in some embodiments. | 03-26-2015 |
20150097500 | STATOR RESISTANCE ESTIMATION FOR ELECTRIC MOTORS - A method of controlling an electric motor (motor) includes providing a processor having an associated memory storing a stator resistance (Rs) estimation (RSE) algorithm that is programmed to implement the RSE algorithm to execute steps including injecting a current waveform at an arbitrary frame of reference into the stator using a field-oriented-control (FOC) motor controller including an Id controller and an Iq controller, and measuring current and voltage values from the motor responsive to the injecting. The measured current and voltage values are then transformed into transformed current and voltage values in a d/q coordinate system. The transformed current and voltage values are low pass filtered to generate filtered d/q current and voltage values, and a value for Rs is estimated from the filtered d/q current and voltage values. The arbitrary frame of reference can be a time-varying frame of reference. | 04-09-2015 |
20160087563 | ANGULAR POSITION ESTIMATION FOR PM MOTORS - A method of determining the angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM) includes providing a processor having an associated memory, wherein the memory stores an angular position determination (APD) equation or hardware is included implementing the APD equation. The APD equation determines the angular position from N-phase measurements obtained from the stator windings associated with each of the N-phases. A voltage or a current is forced upon the stator terminals of the stator windings for each of the N-phases, a resulting stator current or stator voltage is sensed to provide the N-phase measurements responsive to the forcing of the voltage or current, and the APD equation is used to determine the angular position from the N-phase measurements. | 03-24-2016 |
20160087567 | NORMALIZATION OF MOTOR PHASE MEASUREMENTS - A method of normalizing phase measurements for a motor using a normalizing phase measurements (NPM) algorithm that a processor implements to cause a motor controller coupled to stator terminals of the phases to execute forcing a set of input current or voltage vectors (set of input vectors) including repeating the forcing after rotating the rotor through a full mechanical cycle to generate resulting current or voltage samples (resulting samples) of non-normalized phase A and phase B waveforms. The magnitude of the input vectors are sufficiently small to not move the rotor. A maximum value (x_max) and a minimum value (x_min) are determined for each of the non-normalized phase A and phase B waveforms. An offset value and normalization scale factor (NSF) are determined from the max and min values. The offsets and NSFs are applied to the non-normalized phase waveforms to generate normalized phase A and phase B waveforms. | 03-24-2016 |
20160087568 | INPUT VECTOR SET FOR POSITION DETECTION OF PM MOTORS - A method of determining angular position (A) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position. | 03-24-2016 |
Patent application number | Description | Published |
20100037024 | MEMORY INTERLEAVE FOR HETEROGENEOUS COMPUTING - A memory interleave system for providing memory interleave for a heterogeneous computing system is provided. The memory interleave system effectively interleaves memory that is accessed by heterogeneous compute elements in different ways, such as via cache-block accesses by certain compute elements and via non-cache-block accesses by certain other compute elements. The heterogeneous computing system may comprise one or more cache-block oriented compute elements and one or more non-cache-block oriented compute elements that share access to a common main memory. The cache-block oriented compute elements access the memory via cache-block accesses (e.g., 64 bytes, per access), while the non-cache-block oriented compute elements access memory via sub-cache-block accesses (e.g., 8 bytes, per access). A memory interleave system is provided to optimize the interleaving across the system's memory banks to minimize hot spots resulting from the cache-block oriented and non-cache-block oriented accesses of the heterogeneous computing system. | 02-11-2010 |
20120079177 | MEMORY INTERLEAVE FOR HETEROGENEOUS COMPUTING - A memory interleave system for providing memory interleave for a heterogeneous computing system is provided. The memory interleave system effectively interleaves memory that is accessed by heterogeneous compute elements in different ways, such as via cache-block accesses by certain compute elements and via non-cache-block accesses by certain other compute elements. The heterogeneous computing system may comprise one or more cache-block oriented compute elements and one or more non-cache-block oriented compute elements that share access to a common main memory. The cache-block oriented compute elements access the memory via cache-block accesses (e.g., 64 bytes, per access), while the non-cache-block oriented compute elements access memory via sub-cache-block accesses (e.g., 8 bytes, per access). A memory interleave system is provided to optimize the interleaving across the system's memory banks to minimize hot spots resulting from the cache-block oriented and non-cache-block oriented accesses of the heterogeneous computing system. | 03-29-2012 |
Patent application number | Description | Published |
20110126357 | METHOD OF COLLECTING, TRANSPORTING AND CLEANING SOILED TEXTILES - A method of collecting soiled textiles to be cleaned, comprising the steps of providing a container having an open end, a closed end, and sides extending therebetween, providing a sling having an open end, a second end, and sides extending therebetween disposed in and supported by said container, providing a water soluble bag having an open end, a closed end, and sides extending therebetween and made of a plastic film having a thickness of at least 1.3 mils, wherein said bag dissolves in water at a temperature of 165° F. in less than about 250 seconds, does not dissolve in water at a temperature of 85° F. in 7 days, being capable of containing at least 175 lbs. of soiled textiles, and having a capacity of at least 50 gallons, wherein said bag is disposed in and supported by said sling, and wherein soiled textiles deposited in said container are contained in said bag. | 06-02-2011 |
20110127270 | WATER SOLUBLE LAUNDRY BAG AND RECEPTACLE THEREFOR - A water soluble bag for containing soiled textiles, said bag having an open end, a closed end, and sides extending therebetween, said bag made of a plastic film having a thickness of at least 1.3 mils, wherein said bag dissolves in water at a temperature of 165° F. in less than about 250 seconds and does not dissolve in water at a temperature of 85° F. in 7 days, and said bag being capable of containing at least 175 lbs. of soiled textiles and having a capacity of at least 50 gallons. Also disclosed is a receptacle for collecting soiled textiles comprising a container and a water soluble bag. Also disclosed is a receptacle for collecting soiled textiles comprising a container, a sling, and a water soluble bag. | 06-02-2011 |