Patents by Inventor Ram Rajagopal
Ram Rajagopal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11968263Abstract: A method and a system for managing power resources. One or more measurements received from one or more sensors communicatively coupled to at least one processor are processed. The sensors monitor and measure at least one of: one or more operational parameters associated with operation of at least one equipment, one or more external parameters associated with an environment of the equipment, and one or more power parameters associated with a power consumption by the equipment. Based on the processed one or more measurements, one or more future operational parameters associated with an operation of the are determined. The operation of the equipment is controlled using the determined future operational parameters.Type: GrantFiled: March 24, 2022Date of Patent: April 23, 2024Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Ram Rajagopal, Gustavo Vianna Cezar, Thomas Navidi, Elizabeth Buechler, Abbas El Gamal
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Patent number: 11804717Abstract: Systems and methods for coordinating distributed energy storage in accordance with embodiments of the invention are illustrated. One embodiment includes a power distribution network, including a set of nodes, wherein a node includes a controllable load, an uncontrollable load, and a local controller, a substation connected to each node in the set of nodes by a set of distribution lines, and a global controller including a processor, a memory, and a communications device, wherein the global controller obtains load parameters from at least one node, calculates coordination parameters for each node based on the obtained load parameters, and asynchronously provides the coordination parameters to each of the nodes in the set of nodes, and wherein each node independently obtains coordination parameters, and controls the operation of its controllable load using the local controller based on the coordination parameters and a local load profile describing at least the uncontrollable load.Type: GrantFiled: May 7, 2018Date of Patent: October 31, 2023Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Kyle Anderson, Abbas El Gamal, Ram Rajagopal
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Publication number: 20220321664Abstract: A method and a system for managing power resources. One or more measurements received from one or more sensors communicatively coupled to at least one processor are processed. The sensors monitor and measure at least one of: one or more operational parameters associated with operation of at least one equipment, one or more external parameters associated with an environment of the equipment, and one or more power parameters associated with a power consumption by the equipment. Based on the processed one or more measurements, one or more future operational parameters associated with an operation of the are determined. The operation of the equipment is controlled using the determined future operational parameters.Type: ApplicationFiled: March 24, 2022Publication date: October 6, 2022Inventors: Ram Rajagopal, Gustavo Vianna Cezar, Thomas Navidi, Elizabeth Buechler, Abbas El Gamal
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Patent number: 11296507Abstract: Improved control of electrical power consumption is provided with “Smart Dim Fuses” (SDF) which can alter their output voltage as provided to the load circuits they are connected to. SDF units can replace conventional circuit breakers in electrical panels. The voltage control capability provided by SDF units can lead to improved control of electrical power consumption, since many loads can smoothly operate at lower power consumption when the voltage they are driven with decreases. SDF units can comply with relevant safety requirements, such as uninterrupted neutral connections between electrical mains and load circuits. SDF units can also provide a current limiting function that can substitute for the protective action of conventional circuit breakers.Type: GrantFiled: July 9, 2018Date of Patent: April 5, 2022Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Aaron Sargent Goldin, Ram Rajagopal, Claudio Rivetta, Juan M. Rivas Davila
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Publication number: 20190013670Abstract: Improved control of electrical power consumption is provided with “Smart Dim Fuses” (SDF) which can alter their output voltage as provided to the load circuits they are connected to. SDF units can replace conventional circuit breakers in electrical panels. The voltage control capability provided by SDF units can lead to improved control of electrical power consumption, since many loads can smoothly operate at lower power consumption when the voltage they are driven with decreases. SDF units can comply with relevant safety requirements, such as uninterrupted neutral connections between electrical mains and load circuits. SDF units can also provide a current limiting function that can substitute for the protective action of conventional circuit breakers.Type: ApplicationFiled: July 9, 2018Publication date: January 10, 2019Inventors: Aaron Sargent Goldin, Ram Rajagopal, Claudio Rivetta, Juan M. Rivas Davila
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Patent number: 10175268Abstract: A method of estimating a line voltage is provided that includes configuring a capacitive probe to a power line, injecting a perturbation voltage onto the capacitive probe, where the perturbation voltage has a different frequency than a frequency of the line voltage, measuring, using a capacitive sensor, a retrieved perturbation voltage, where the retrieved perturbation voltage is dependent on a capacitance between the capacitive probe and a ground capacitance, using an appropriately programmed computer to track real time changes in the capacitance of the capacitive probe, and estimating a line voltage.Type: GrantFiled: April 14, 2016Date of Patent: January 8, 2019Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Raffi Sevlian, Ram Rajagopal
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Publication number: 20180358812Abstract: Systems and methods for coordinating distributed energy storage in accordance with embodiments of the invention are illustrated. One embodiment includes a power distribution network, including a set of nodes, wherein a node includes a controllable load, an uncontrollable load, and a local controller, a substation connected to each node in the set of nodes by a set of distribution lines, and a global controller including a processor, a memory, and a communications device, wherein the global controller obtains load parameters from at least one node, calculates coordination parameters for each node based on the obtained load parameters, and asynchronously provides the coordination parameters to each of the nodes in the set of nodes, and wherein each node independently obtains coordination parameters, and controls the operation of its controllable load using the local controller based on the coordination parameters and a local load profile describing at least the uncontrollable load.Type: ApplicationFiled: May 7, 2018Publication date: December 13, 2018Applicant: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Kyle Anderson, Abbas El Gamal, Ram Rajagopal
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Patent number: 9501532Abstract: Techniques are provided for ranking-based information processing. Method steps can include integrating information from at least one source (a plurality of heterogeneous sources can also be handled), to obtain integrated information; mapping the integrated information to at least one application; ranking the integrated information based on the mapping and on ranking criteria from a knowledge base; and processing the integrated information, based on the ranking, to obtain processed integrated information. Optionally, the processing step includes formatting the processed integrated information for a plurality of applications.Type: GrantFiled: June 18, 2008Date of Patent: November 22, 2016Assignee: International Business Machines CorporationInventors: Mao Chen, Mitchell A. Cohen, Rakesh Mohan, Ram Rajagopal, Jakka Sairamesh, Stephen V. Stibler
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Publication number: 20160305987Abstract: A method of estimating a line voltage is provided that includes configuring a capacitive probe to a power line, injecting a perturbation voltage onto the capacitive probe, where the perturbation voltage has a different frequency than a frequency of the line voltage, measuring, using a capacitive sensor, a retrieved perturbation voltage, where the retrieved perturbation voltage is dependent on a capacitance between the capacitive probe and a ground capacitance, using an appropriately programmed computer to track real time changes in the capacitance of the capacitive probe, and estimating a line voltage.Type: ApplicationFiled: April 14, 2016Publication date: October 20, 2016Inventors: Raffi Sevlian, Ram Rajagopal
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Publication number: 20150332294Abstract: A methodology is provided for informing targeted Demand-Response (DR) and marketing programs that focus on the temperature-sensitive part of residential electricity demand. The methodology uses energy consumption readings collected from “smart” electricity meters, as well as hourly temperature readings. Individual consumption is decomposed into a thermal-sensitive part and a base load (non thermally-sensitive), a model of temperature response that is based on thermal regimes, i.e., unobserved decisions of customers to use their heating or cooling appliances. This model is used to extract useful benchmarks that compose a thermal profiles of individual customers, i.e., terse characterizations of the statistics of these customers' temperature-sensitive consumption. This knowledge may, in turn, inform the DR program by allowing scarce operational and marketing budgets to be spent on customers whose influencing will yield highest energy reductions at the right time.Type: ApplicationFiled: May 19, 2015Publication date: November 19, 2015Inventors: Adrian Albert, Ram Rajagopal
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Publication number: 20150186827Abstract: A method for enrolling utility customers in utility demand response or energy efficiency programs based on time-series consumption data includes collecting from smart meter sensors time-series utility consumption data from individual utility customers, extracting features from the consumption data, generating a probabilistic response model for each customer representing a relationship between the extracted features and customer program performance by estimating parameters of a response distribution, solving an optimization problem for each customer using the estimated response distribution to achieve a targeting objective, and enrolling selected customers in programs based on the solution to the optimization problem.Type: ApplicationFiled: December 11, 2014Publication date: July 2, 2015Inventors: Jungsuk Kwac, Ram Rajagopal
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Publication number: 20150161233Abstract: Utility customer segmenting according to consumption lifestyle features is performed by collecting from smart meter sensors time-series utility consumption data from individual utility customers, standardizing the consumption data by dividing the time-series data into daily consumption profiles, generating a consumption profile dictionary from the standardized data, encoding the standardized data using the dictionary, extracting consumption lifestyle features of the utility customers from the encoded data, and segmenting the customers based on the extracted features by clustering.Type: ApplicationFiled: December 11, 2014Publication date: June 11, 2015Inventors: June Flora, Jungsuk Kwac, Ram Rajagopal
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Patent number: 8989996Abstract: A roadway information system is disclosed with components generating and using vehicle signatures for vehicles passing near sensor pods located on or near lanes. These components in turn are part of and/or communicate with means and/or processors for generating an/or using Vehicle Movement Estimates based upon the vehicle signatures. The VME are used to create traffic feedback that may be presented to programmable field devices that may present at least some of the traffic feedback to drivers of the vehicles, thereby optimizing the fuel usage and travel time of the roadway.Type: GrantFiled: March 11, 2013Date of Patent: March 24, 2015Assignee: Sensys Networks, Inc.Inventors: Robert Kavaler, Karric Kwong, Ram Rajagopal, Pravin Varaiya
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Patent number: 8990032Abstract: Apparatus and methods are disclosed that may be configured to respond to vibrations in a pavement induced by the travel of a vehicle on the pavement. The apparatus may include vibration sensor nodes embedded in the pavement and systems using the response of the sensor nodes to generate vehicle parameters, weight estimates, pavement deflection estimates and vehicle classifications. From these and other data, traffic ticket, tariff and insurance messages about the vehicle may be generated. Processors and processor-units are disclosed. Delivery mechanisms to configure the processor units and entities controlling and/or benefiting from the deliveries are disclosed.Type: GrantFiled: April 22, 2011Date of Patent: March 24, 2015Assignee: Sensys Networks, Inc.Inventors: Ravneet Bajwa, Ram Rajagopal, Robert Kavaler, Pravin Varaiya
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Publication number: 20140316708Abstract: A sensor for structural health monitoring includes a tri-axis microelectromechanical systems (MEMS) accelerometer and a tri-axis MEMS gyrometer. Sampled 3D accelerometer data and 3D gyrometer data are processed using integration and sensor fusion to produce an estimate of 3D rotation of the sensor device and an estimate of 3D displacement of the sensor device expressed in a global reference frame. The sensor measurements may also be corrected using structural model information. Optionally, the sensor may include a tri-axis MEMS magnetometer and use the 3D magnetometer data to increase the accuracy of the estimates. The sensor transmits the estimates wirelessly to a central unit for assessing structural damage.Type: ApplicationFiled: April 19, 2014Publication date: October 23, 2014Inventors: Mark G. Mollineaux, Ram Rajagopal, Anne S. Kiremidjian
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Publication number: 20130314273Abstract: The following are disclosed and claimed: A micro-radar adapted to generate an antenna output of less than or equal to 10 milli-Watt (mW) through an antenna to an object and receive a Radio Frequency (RF) reflection off of said object, and adapted to respond to a first Digital to Analog Converter (DAC) output and a second DAC output. A wireless sensor node and/or a processor for use in said wireless sensor node. A wireline sensor node and/or a processor for use in said wireline sensor node configured operate said micro-radar by control of said first and said second DAC output. A second apparatus configured to receive an improved sensor report from at least two of the wireless sensor nodes. A processor for use with the second apparatus. A third apparatus adapted to respond to vibrations in pavement. Several integrated circuits and systems. Installation devices, servers and/or computer readable memories.Type: ApplicationFiled: December 30, 2011Publication date: November 28, 2013Applicant: SENSYS NETWORKS, INC.Inventors: Robert A. Kavaler, Akhila Raman, Ravneet Bajwa, Ram Rajagopal, Pravin Varaiya
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Patent number: 8428857Abstract: A roadway information system is disclosed with components generating and using vehicle signatures for vehicles passing near sensor pods located on or near lanes. Means and/or processors for matching incoming and outgoing vehicle signatures are disclosed creating an in-out vehicle match table used to generate a vehicle movement estimate or its components including a travel time and/or vehicle count.Type: GrantFiled: July 20, 2009Date of Patent: April 23, 2013Assignee: Sensys Networks, Inc.Inventors: Karric Kwong, Robert Kavaler, Ram Rajagopal, Pravin Varaiya
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Patent number: 8396650Abstract: A roadway information system is disclosed with components generating and using vehicle signatures for vehicles passing near sensor pods located on or near lanes in a multiple input-output roadway node. Means and/or processors for matching incoming and outgoing vehicle signatures are disclosed creating an in-out vehicle match table used to generate a vehicle movement estimate or its components including a travel time and/or vehicle count that may be created and/or used in response to a match tally exceeding a threshold or the stimulation of a timing signal.Type: GrantFiled: July 20, 2009Date of Patent: March 12, 2013Assignee: Sensys Networks, Inc.Inventors: Karric Kwong, Robert Kavaler, Pravin Varaiya, Ram Rajagopal
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Publication number: 20120176103Abstract: A voltage-converter and a signal processing circuit are disclosed. A voltmeter, a power meter and a three-phase meter each including the voltage-converter and the signal processing circuit are disclosed. Methods of making the voltage-converters, voltmeters, three phase meters and power meters, as well as operating and/or using these apparatus are disclosed. Apparatus including feedback paths with at least one voltage-converters, voltmeters, three-phase meters and/or power meters are disclosed.Type: ApplicationFiled: September 3, 2010Publication date: July 12, 2012Applicant: VERIVOLT, LLCInventors: Juan Lizarazo, Ram Rajagopal
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Publication number: 20120173171Abstract: Apparatus and methods are disclosed that may be configured to respond to vibrations in a pavement induced by the travel of a vehicle on the pavement. The apparatus may include vibration sensor nodes embedded in the pavement and systems using the response of the sensor nodes to generate vehicle parameters, weight estimates, pavement deflection estimates and vehicle classifications. From these and other data, traffic ticket, tariff and insurance messages about the vehicle may be generated. Processors and processor-units are disclosed. Delivery mechanisms to configure the processor units and entities controlling and/or benefiting from the deliveries are disclosed.Type: ApplicationFiled: April 22, 2011Publication date: July 5, 2012Applicant: SENSYS NETWORKS. INCInventors: Ravneet Bajwa, Ram Rajagopal, Robert Kavaler, Pravin Varaiya