Patent application number | Description | Published |
20100263445 | MEMS INERTIAL SENSOR WITH FREQUENCY CONTROL AND METHOD - An inertial sensor has a transducer with a sense resonator. The sense resonator is oscillated. A signal responsive to the oscillation is provided. A first baseband signal and a second baseband signal are provided responsive to the signal responsive to the oscillation of the sense resonator. A signal for controlling a resonance frequency of the sense resonator is provided responsive to performing a Goertzel algorithm on the first baseband signal and the second baseband signal. One use of controlling the resonance frequency is to control an offset between the resonance frequency of the sense resonator and the frequency of the oscillation of drive masses in the sense resonator. Using the Goertzel algorithm is particularly efficient in controlling the resonance frequency. | 10-21-2010 |
20130192363 | Vibration Robust X-Axis Ring Gyro Transducer - A micro-electromechanical systems (MEMS) transducer ( | 08-01-2013 |
20140250970 | SYSTEM AND METHOD FOR MONITORING A GYROSCOPE - Systems and methods are provided for monitoring operation of MEMS gyroscopes ( | 09-11-2014 |
20140250971 | SYSTEM AND METHOD FOR MONITORING AN ACCELEROMETER - Systems and methods are provided for monitoring operation of MEMS accelerometers ( | 09-11-2014 |
20140251009 | SYSTEM AND METHOD FOR REDUCING OFFSET VARIATION IN MULTIFUNCTION SENSOR DEVICES - Systems and methods are provided for improved multifunction sensing. In these embodiments a multifunction sensing device ( | 09-11-2014 |
20140266474 | SYSTEM AND METHOD FOR IMPROVED MEMS OSCILLATOR STARTUP - A MEMS resonator system comprises a MEMS resonator, kick start circuitry, feedback circuitry, an oscillator, and a switch. The MEMS resonator system is configured to provide a pulsed kick-start signal having a frequency and period such that energy delivered to the MEMS resonator is optimized in a short period of time, resulting is reduced oscillator startup time. The MEMS resonator system is configured to switch out the kick-start signal when the MEMS resonator oscillation has been achieved, and switch in feedback circuitry to maintain the MEMS resonator in a state of oscillation. | 09-18-2014 |
20150061702 | ELECTRO-MECHANICAL OSCILLATOR AND COMMON-MODE DETECTION CIRCUIT - A multi-mass resonator and a common-mode detection circuit are provided. The common-mode detection circuit, for example, may include a plurality of sensing electrodes, an interface circuit configured to interface with the plurality of sensing electrodes, and a common-mode capacitance extractor circuit electrically coupled in parallel to the interface circuit and configured to detect common-mode capacitance between the plurality of sensing electrodes and output a voltage representative the detected common-mode capacitance, and a differential-mode capacitance extractor circuit electrically coupled in parallel to the interface circuit and configured to detect differential-mode capacitance between the plurality of sensing electrodes and output a voltage representative the detected differential-mode capacitance. | 03-05-2015 |
Patent application number | Description | Published |
20100146970 | Method and system for enhancing power output of renewable thermal cycle power plants - A steam reheat process is provided to enhance a thermal power cycle, and particularly a renewable steam thermal cycle. An oxyfuel combustion gas generator is provided which combusts a hydrogen and/or carbon containing fuel with an oxidizer of primarily oxygen to generate products of combustion including steam and/or carbon dioxide. Water from the thermal cycle is directed to the reheater for mixing with the products of combustion within the reheater to generate a working fluid containing steam. This steam is routed through a turbine or other expander and power is outputted from the system. The water is optionally thereafter condensed and at least partially routed back to the thermal cycle. Any carbon dioxide within the working fluid can be separated in a condenser downstream of the expander for capture of the carbon dioxide, such that increased power output for the thermal power cycle is achieved without atmospheric emissions. | 06-17-2010 |
20100224363 | Method of direct steam generation using an oxyfuel combustor - A gas generator is provided with a combustion chamber into which oxygen and a hydrogen containing fuel are directed for combustion therein. The gas generator also includes water inlets and an outlet for a steam and CO | 09-09-2010 |
20100326084 | Methods of oxy-combustion power generation using low heating value fuel - An oxy-combustor is provided to combust oxygen with gaseous low heating value fuel. A compressor upstream of the combustor compresses the fuel. The combustor produces a drive gas including steam and carbon dioxide as well as other non-condensable gases in many cases, which pass through a turbine to output power. The drive gas can be recirculated to the combustor, either through the compressor, the oxygen inlet or directly to the combustor. Recirculation can occur before or after a condenser for separation of a portion of the water from the carbon dioxide. Excess carbon dioxide and steam is collected from the system. The turbine, combustor and compressor can be derived from an existing gas turbine with fuel and air/oxidizer lines swapped. | 12-30-2010 |
20110126549 | Ultra low emissions fast starting power plant - The power plant combusts a hydrocarbon fuel with oxygen to produce high temperature high pressure products of combustion. These products of combustion are routed through an expander to generate power. The products of combustion are substantially free of oxides of nitrogen because the oxidizer is oxygen rather than air. To achieve fast starting, oxygen, fuel and water diluent are preferably stored in quantities sufficient to allow the power plant to operate from these stored consumables. The fuel can be a gaseous or liquid fuel. The oxygen is preferably stored as liquid and routed through a vaporizer before combustion in a gas generator along with the hydrocarbon fuel. In one embodiment, the vaporizer gasifies the oxygen by absorption of heat from air before the air is routed into a separate heat engine, such as a gas turbine. The gas turbine thus operates on cooled air and has its power output increased. | 06-02-2011 |
20130022537 | HYDROGEN PRODUCTION FROM AN OXYFUEL COMBUSTOR - A method is provided for hydrogen production from a hydrogen and carbon containing fuel combusted within an oxyfuel combustor. The oxyfuel combustor combusts hydrogen and carbon containing fuel with oxygen at a non-stoichiometric ratio, typically fuel rich. In such an operating mode, products of combustion include steam, carbon dioxide, carbon monoxide and hydrogen. These products of combustion are then passed through a hydrogen separator. Remaining products of combustion can be optionally combusted at a stoichiometric ratio with oxygen in a second oxyfuel combustor discharging substantially only steam and carbon dioxide. A turbine or other expander can be provided downstream from the gas generator to produce power and eliminate carbon monoxide from the system. The system can be operated in a second mode where the gas generator combusts the fuel with oxygen at a stoichiometric ratio to maximize electric power generation without hydrogen production at periods of peak power demand. | 01-24-2013 |
20140000880 | METHOD OF DIRECT STEAM GENERATION USING AN OXYFUEL COMBUSTOR | 01-02-2014 |
20140137779 | NEAR ZERO EMISSIONS PRODUCTION OF CLEAN HIGH PRESSURE STEAM - Substantially pure high pressure steam is produced within a high pressure heat exchanger. Heat for the high pressure heat exchanger is provided from an outlet of an oxy-fuel combustion gas generator which discharges a steam/CO | 05-22-2014 |