Abstract: In a power converter, a circuit determines an average value of an inaccessible current from an average value of an accessible current and a value of the operating duty cycle of the converter. A method of measuring an average value of an inaccessible current from a measured value of a current in a power converter by a duty cycle of a pulse width modulation (PWM) signal representing a duty cycle of the power converter. Coupling a voltage representing the measured value to an input of a low pass filter during a time period (D) and coupling the input of the low pass filter to a reference voltage during a time period (1?D).

Abstract: One embodiment relates to power conversion system. The system includes a converter configured to convert an input voltage to an output voltage, the converter comprising at least one switch that is controlled in response to an activation signal to provide current through an inductor. A transition mode controller is configured to provide the activation signal based on a measure of charge derived from current through the switch and based on the current through the inductor.

Abstract: An AC-DC converter has a totem-pole output circuit having first and second semiconductor switches, each having a channel coupled to a switching node and having a parasitic capacitance associated with the channel. An inductor has one terminal thereof connected to a switching node. First and second bypass devices are coupled to a second terminal of the inductor and operable during at least a portion of an input voltage to allow reverse current from an output of the converter to generate soft-switching of the first semiconductor switch. An asymmetrical shunt for measuring current in a first direction and bypassing current in a second direction opposite the first direction allows accurate measurement of reverse current.

Abstract: Embodiments include a method, a manual device, a handheld manual device, a handheld writing device, a system, and an apparatus. An embodiment provides a device. The device includes an imaging circuit operable to acquire digital information encoded in a hand-formed analog expression marked on a surface by a handheld writing device. The device also includes a translator circuit operable to decode the digital information. The device further includes a correlation circuit operable to generate a signal indicative of the decoded digital information.

Abstract: Systems and methods are provided for providing a substantially constant and equal current to a plurality of current driven loads. In one embodiment, a system is provided that comprises a plurality of current regulated outputs and a plurality of current driven loads. The plurality of current regulated outputs and the plurality of current driven loads are arranged in a single current loop configuration with a respective current regulated output providing an output voltage to a respective current driven load of the plurality of current driven loads.

Abstract: Embodiments include a method, a manual device, a handheld manual device, a handheld writing device, a system, and an apparatus. An embodiment provides a system. The system includes a manual device. The manual device includes a first writing element operable to discharge a first marking substance on a surface in response to a movement of the first writing element upon the surface. The manual device also includes a second writing element operable to discharge a second marking substance on the surface in response to a controller. The controller is operable to encode information corresponding to an environment of the manual device by regulating a discharge of the second marking substance. The system also includes a sensor operable to acquire data indicative of an environment of the manual device.

Abstract: A system for biometric exclusion of certain individuals from entering a facility. A biometric exclusion system may use biometric acquisition and matching and a database to screen a large population of subjects by looking for individuals enrolled in a database. A screening approach may be used to match biometrics having sufficient quality of any individuals attempting to enter the facility, relative to biometrics of individuals stored in the database. A biometric, such as that of a face or an iris, of an individual may be obtained with the individual's knowledge or cooperation. The database may have biographical information pertinent to an individual having a biometric in the database. There may be an associated system which may be used to enroll individuals by entering their biometrics in the database.

Abstract: Circuits and methods for generating a reference voltage for a power converter control are disclosed herein. The power converter control providing a signal on an output for aligning the voltage and current on a power line so that they are in phase. An embodiment of a circuit includes a voltage detector that detects the voltage on the power line. A signal generator generates a wave that is in phase with voltage on the power line, the wave being generated independent of the voltage on the power line. The output of the signal generator is the reference voltage.

Abstract: A portable electronic device having an outer case having a substantially planar face in which a microphone associated acoustic port is formed. The device also has a micro-electro-mechanical system (MEMS) microphone positioned within the outer case, the MEMS microphone having a diaphragm facing the microphone associated acoustic port. An acoustic mesh is positioned between the front face of the outer case and the diaphragm, the acoustic mesh having a non-linear acoustic resistance so as to minimize an effect of an incoming air burst on the diaphragm. Other embodiments are also described and claimed.

Abstract: Systems and methods for detecting people in video data streams or image data are provided. The method includes using a plurality of training images for learning spatial distributions associated with a plurality of body parts, detecting a plurality of detections of body parts in an input image, clustering the detections of body parts located within a predetermined distance from one another to create one effective detection for each cluster of detections, and determining a position of each person associated with each effective detection. The detections of body parts can be associated with respective previously learned spatial distributions.

Abstract: A portable electronic device having an outer case having a substantially planar face in which a microphone associated acoustic port is formed. The device also has a micro-electro-mechanical system (MEMS) microphone positioned within the outer case, the MEMS microphone having a diaphragm facing the microphone associated acoustic port. An acoustic mesh is positioned between the front face of the outer case and the diaphragm, the acoustic mesh having a non-linear acoustic resistance so as to minimize an effect of an incoming air burst on the diaphragm. Other embodiments are also described and claimed.

Abstract: A dynamometer may be configured to simulate the rotating inertial characteristics of a wheel-tire assembly slipping relative to a road surface and having rotating inertial characteristics different than the rotating inertial characteristics of the wheel-tire assembly being simulated.

Abstract: An adaptive iris matching approach for processing images of irises having a quality not sufficient for conventional non-adaptive matching approaches. Visible regions in a radial direction on an iris, without segmenting a circumferential of the iris, may be processed. A boundary of the visible region of the iris may be estimated. An iris map may be constructed with the non-visible portion of the iris masked. The iris map may be at least partially encoded. Partial codes of the iris map may be extracted to index at least portions of a database containing iris information. Irises may be retrieved from the database with an iris code as a query.

Abstract: In a first aspect, an LLC resonant converter is provided for driving a plurality of output circuits from a DC input signal. The LLC resonant converter includes: (a) an inverter circuit for converting the DC input signal to a square-wave signal; (b) an inductor network coupled to the inverter circuit; and (c) a plurality of transformers, each transformer including a primary winding and a secondary winding. The primary windings of the transformers are coupled in series, and the series-coupled primary windings are coupled in parallel with the inductor network. The secondary winding of each transformer is coupled to and provides a current to a corresponding one of the output circuits. The secondary winding currents are substantially equal, and power is processed by a single transformer between the DC input signal and each output circuit. Numerous other aspects are also provided.

Abstract: Embodiments include a method, a manual device, a handheld manual device, a handheld writing device, a system, and an apparatus. An embodiment provides a system. The system includes a manual device that includes a writing element operable to discharge a marking substance on a surface in response to a movement of the writing element upon the surface. The system also includes a sensor operable to acquire information corresponding to an environment of the manual device. The system further includes a verification module operable to determine a correspondence between a first aspect of the environment of the manual device and a second aspect of the environment of the manual device.

Abstract: The present invention relates generally to thermal imaging systems and methods and uses therefor, and in a particular though non-limiting embodiment, to a method of detecting corrosion under insulation, as well as corrosion-related material data associated therewith. The system utilizes advanced infrared imaging video cameras to detect characteristic signatures of wet thermal traits on process equipment. Various embodiments of the invention integrate equipment, automation, and algorithms to form a method for identifying wet thermal insulation by scanning multiple locations along insulated piping, tanks, or other manufacturing equipment. Such scans can occur individually, sequentially, or simultaneously, with the results then being stored and comparatively analyzed.

Abstract: A test stand may include a clutch operatively arranged with a dynamometer and a flywheel. The test stand may further include a controller configured to control the clutch to decouple a rotating inertia of the dynamometer from a rotating inertia of the flywheel such that the rotating inertia of the flywheel exhibits a desired rotating inertia.

Abstract: One example of the invention relates to a power system. The power system can include a switching power converter configured to convert an input voltage to an output voltage for providing power at an output thereof to which a load is connectable. A measurement system can include measurement circuitry configured to measure an average of an accessible current in the power converter during both continuous and discontinuous modes of operation and derive an average measurement of another current in the power converter based on timing control signals used to control operation of the power converter.

Abstract: One embodiment of the invention relates to a power apparatus. The power apparatus includes a power converter configured to convert an input voltage to an output voltage for providing power at an output thereof to which a load is connectable. The converter can include an isolation barrier configured to electrically isolate the output and the load from an input source that provides the input voltage. The system also includes a control loop that includes indirect sense circuitry configured to indirectly derive an indication of at least one of output current and output power of the converter. The control loop is configured to control output current or output power based on the indirectly derived indication of output current or output power, respectively.

Abstract: A computer-implemented method of processing a selected image using multiple processing operations is provided. An image analysis sequence having multiple processing steps is constructed. The image analysis sequence is constructed in response to receipt of multiple processing operation selections. Individual processing steps in the image analysis sequence are associated with a processing operation that is indicated in a corresponding processing operation selection. The processing steps are arranged in response to receipt of arrangement information that relates to a selective arrangement of the processing steps. At least one of the processing steps in the image analysis sequence is configured such that the processing operation associated with the processing step processes a specified input image to generate an output image when the processing step is performed. A display signal is generated for display of the output image at a display device.