Patents by Inventor Dipen N. Sinha

Dipen N. Sinha 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).

  • Patent number: 11293279
    Abstract: Apparatus includes a plurality of geological subsurface electrical line sensors spaced apart from each other proximate a predetermined geological subsurface region of interest, with at least one of the electrical line sensors situated as a line source to produce a multi-frequency electrical impedance tomography source signal, and with at least one of the electrical line sensors situated as a line detector to receive the multi-frequency electrical impedance tomography response signal associated with the source signal that propagates through the predetermined geological subsurface region of interest, and a controller including a processor and a memory configured with instructions that, when executed by the processor, cause the processor to determine an electrical mapping over the predetermined geological subsurface region of interest based on the multi-frequency electrical impedance tomography source signal, response signal, and the spatial positions of the geological subsurface electrical line sensors.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: April 5, 2022
    Assignee: Triad National Security, LLC
    Inventors: Satish Karra, Hari S. Viswanathan, Maruti Kumar Mudunuru, Vamshi Krishna Chillara, Dipen N. Sinha
  • Publication number: 20220017387
    Abstract: Apparatus and method for separating oil from water in produced oil without requiring large separation tanks in which the fluid is heated, using a simple, energy efficient separation process, are described. Centrifugal forces, by themselves, are not effective for completely separating a two-component fluid, especially when the densities of the fluids are similar, such as for heavy oil. By combining both primary and secondary acoustic forces, and taking advantage of centrifugal forces from fluid flow, such that acoustic radiation forces initiate the process of droplet accumulation, and contribute to droplet coalescence, centrifugal separation is enhanced.
    Type: Application
    Filed: July 15, 2021
    Publication date: January 20, 2022
    Applicant: AWE Technologies, LLC
    Inventor: Dipen N. Sinha
  • Publication number: 20220001090
    Abstract: In one aspect, a method and system for detecting a change in fluid dynamics of a fluid flowing through an extra-corporeal circuit is disclosed, which includes establishing an acoustic wave resonance across a transverse dimension of at least a portion of a line associated with the extra-corporeal circuit through which the fluid flows, monitoring a phase signal of the resonant acoustic wave, and identifying occurrence of a change in fluid dynamics of the flowing fluid when the observed phase signal of the resonant acoustic wave indicates a deviation from the expected fluid flow signature. The change in fluid dynamics can be used to indicate a venous needle dislodgement event.
    Type: Application
    Filed: June 30, 2021
    Publication date: January 6, 2022
    Inventors: Robert SCHAEFER, Gareth T. Schaefer, Scott Macintosh, Dipen N. Sinha, Peter G. Espina, Martin J. Crnkovich
  • Publication number: 20210392911
    Abstract: An acoustic apparatus and method for using a combination of low-frequency and high-frequency vibration of dried food, grain being an example, such that there are a large number of collisions among the individual grain particles for destroying microorganisms that reside on the surface or just below the surface of the grain, are described. Embodiments of the invention permit bulk and continuous processing of the food. It is expected that such collisions do not produce any chemical changes in the food, nor should it have any adverse effects on the taste thereof. Embodiments of the apparatus are applicable to destruction of airborne microorganisms.
    Type: Application
    Filed: June 16, 2021
    Publication date: December 23, 2021
    Applicant: AWE Technologies, LLC
    Inventor: Dipen N. Sinha
  • Publication number: 20210356435
    Abstract: Techniques are provided for detecting wafer defects. Example techniques include exciting a wafer using an acoustic signal to cause the wafer to exhibit vibrations, measuring one or more of linear frequency response metrics or nonlinear frequency responses metrics associated with the vibrations, and identifying any defects in the wafer based at least in part on one or more of the linear frequency response metrics or nonlinear frequency responses metrics. In embodiments, the wafer includes bismuth telluride (Bi2Te3).
    Type: Application
    Filed: May 14, 2021
    Publication date: November 18, 2021
    Inventors: Cristian Pantea, John James Greenhall, Alan Lyman Graham, Dipen N. Sinha
  • Publication number: 20210333239
    Abstract: An apparatus and method utilizing acoustic resonance spectroscopy applicable to any mechanical device or structure having internal or external components that need to be positioned away from a set point and then returned to the original position, such as a valve which is opened to pass fluids and subsequently closed, for noninvasively providing a measure of the deviation from the original position, and for classifying or grouping together objects that appear to be identical from the outside, but which may have slight external or internal differences, such as sealed containers filled with different fluids or materials, are described.
    Type: Application
    Filed: April 23, 2021
    Publication date: October 28, 2021
    Applicant: AWE Technologies, LLC
    Inventor: Dipen N. Sinha
  • Publication number: 20210096109
    Abstract: Described are an apparatus, computer program product, and associated methods for shaped waveform acoustic interrogation of substances and materials to determine one or more properties of the materials or substances. In some embodiments, a shaped waveform is formed by summing two or more different waveforms and an acoustic wave is generated according to the shaped waveform. The acoustic wave is transmitted by one or more transmitting transducers through the substance or material and received by one or more receiving transducers. The shaped waveform acoustic wave can have a duration or a period that is less than about 20 ?s and can comprise predetermined frequency content. Characteristics of the shaped waveform acoustic wave, as received at the receiving transducer(s), including characteristics such as amplitude, frequency, time of flight, etc., can be associated with said one or more properties of the substance or material to provide for real-time monitoring of these properties.
    Type: Application
    Filed: September 28, 2020
    Publication date: April 1, 2021
    Inventors: Dipen N. SINHA, Cristian PANTEA
  • Patent number: 10908131
    Abstract: Apparatus and methods for the measurement of gas volume fraction of produced oil are described. A first method measures the response of a pipe containing the produced oil excited by a source of vibration in the form of an acoustic frequency chirp containing a linearly varying range of frequencies in the tens of kilohertz range encompassing at least one resonant mode of the pipe. As the gas volume fraction increases, the location of the peak maximum of the measured frequency spectrum responsive to the excitation increases in frequency, and the height of the peak maximum increases, thereby permitting a linear calibration curve to be obtained. A second method measures the response of a pipe containing the produced oil to excitation by a continuous source of vibration having a chosen frequency above those which excite flexural vibrations in the pipe and simultaneously excite acoustic waves in the fluid contained in the pipe, known as the coincidence frequency.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: February 2, 2021
    Assignee: TRIAD NATIONAL SECURITY, LLC
    Inventors: Dipen N. Sinha, Anirban Chaudhuri, Cristian Pantea
  • Patent number: 10887682
    Abstract: Acoustic signal sources include acoustic resonators that include acoustic nonlinear materials. Acoustic signals at higher frequencies are mixed in the nonlinear materials to produce a lower frequency acoustic signal. Resonance provides increased efficiency in producing acoustic signals at difference frequencies corresponding to resonance frequencies. Higher frequency acoustic signals used in nonlinear mixing are preferably at frequencies corresponding to resonance frequencies as well.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: January 5, 2021
    Assignee: Triad National Security, LLC
    Inventors: Cristian Pantea, Dipen N. Sinha
  • Patent number: 10830735
    Abstract: Apparatus (10) and methods for making simultaneous measurements of composition (water-cut), fluid flow, and sound attenuation in a multiphase fluid flowing (15) through a pipe (12) in real-time, using the same apparatus (10) are described. Additionally, the apparatus (10) provides real-time pipe wall thickness monitoring for observing pipe corrosion or internal deposition. Knowledge of wall thickness is necessary to correct for water-cut (oil-water composition) automatically by adjusting the liquid path length internal to the pipe (spool). The use of short duration frequency chirp excitation signals (24) enables the apparatus to provide information that can be used to extract multiple levels of information from the same measurement in multiphase fluids including the presence of a significant quantity of gas (˜60% gas volume fraction) in different flow regimes. Besides measuring steady flow, this device is useful for measurements during fast changing flows, such as for a rod-pumped well.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: November 10, 2020
    Assignee: Triad National Security, LLC
    Inventors: Dipen N. Sinha, Anirban Chaudhuri
  • Publication number: 20200326312
    Abstract: Apparatus for performing multiple different measurements on a small specimen sample, enabling testing and diagnoses in real time at the point of care are described. The core of the apparatus includes an ultrasonic resonator cavity where acoustic resonances are used to determine the speed of sound and sound attenuation in a single droplet. Acoustic measurements are made in the reflection mode using electrical impedance of a small piezoelectric crystal transducer that operates in the thickness longitudinal mode. Combination of this technology with electromagnetic, electrical, and magnetic fields permits multiple types of measurements to be made using the same resonator cavity.
    Type: Application
    Filed: April 8, 2020
    Publication date: October 15, 2020
    Applicant: AWE Technologies, LLC
    Inventors: Dipen N. Sinha, Peter G. Espina
  • Patent number: 10794865
    Abstract: An apparatus and method for the separation of an oil-water mixture into its components are described. An acoustic radiation force moves oil droplets to the nodes of an acoustic standing wave generated in a vertical column containing the oil-water mixture. Once the droplets are sufficiently close together, attractive forces become dominant and the droplets may coalesce to form larger droplets, which have greater buoyancy, and separation of the mixture into a layer of oil and a layer of water occurs, not possible by simple gravitational separation. Acoustically-driven oil-water separation may be used for water-cut measurements in oil production wells, since separation of the oil from the water permits accurate sound speed measurements to be made for both the oil and the water, thereby allowing frequent in situ calibrations of the apparatus to determine whether sound speed measurements on the mixture are accurate in the event that one or both of the mixture constituents is changing.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: October 6, 2020
    Assignee: Triad National Security, LLC
    Inventors: Dipen N. Sinha, Cristian Pantea
  • Patent number: 10697938
    Abstract: A measurement system and a method for determining steam quality (i.e. vapor mass fraction) measurements of multiphase fluid flowing through pipes are described. An acoustic sensor device consists of an acoustic transmitter and an acoustic receiver that are designed to be attached to a pipe. The acoustic transmitter and the acoustic receiver are exposed to an interior space of the pipe through openings in a wall of the pipe. Acoustic waves generated by the transmitter and captured by the receiver traverse the multiphase fluid flowing into the pipe. Swept-frequency acoustic interferometry (SFAI) technique is used to measure ultrasonic acoustic properties of a fluid. Machine-learning techniques based on principal component analysis, support vector machine regression and support vector machine classification are used for determining steam quality.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: June 30, 2020
    Assignees: Triad National Security, LLC, Chevron U.S.A. Inc.
    Inventors: Alessandro Cattaneo, Dipen N. Sinha, Todd Andrew Jankowski, James Schrodt
  • Patent number: 10605640
    Abstract: An apparatus and method for real-time visualization of particulate matter suspended in a static or flowing fluid and fluid flow patterns in a pipe, tube, conduit, or other container, are described. Ultrasonic scanning and detection of scattered sound from the particles in the fluid create a real-time image of the particles, or of flow patterns in the liquid. A mechanical wobbler directs a piezoelectric transducer over a chosen angle in an oscillatory manner. The transducer is operated in a pulse-echo mode wherein the same transducer detects the return signal from the target region through which particles are passing and/or a flow is present. The pulse-echo measurements are made rapidly and continuously during a single sweep of the transducer over the chosen angle. Received signals are processed in the ultrasound scanner electronics module and displayed as an image in real-time.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: March 31, 2020
    Assignee: Triad National Security, LLC
    Inventors: Dipen N. Sinha, Curtis F. Osterhoudt, Cristian Pantea
  • Publication number: 20200096484
    Abstract: A measurement system and a method for determining steam quality (i.e. vapor mass fraction) measurements of multi-phase fluid flowing through pipes are described. An acoustic sensor device consists of an acoustic transmitter and an acoustic receiver that are designed to be attached to a pipe. The acoustic transmitter and the acoustic receiver are exposed to an interior space of the pipe through openings in a wall of the pipe. Acoustic waves generated by the transmitter and captured by the receiver traverse the multi-phase fluid flowing into the pipe. Swept-frequency acoustic interferometry (SFAI) technique is used to measure ultrasonic acoustic properties of a fluid. Machine-learning techniques based on principal component analysis, support vector machine regression and support vector machine classification are used for determining steam quality.
    Type: Application
    Filed: March 15, 2018
    Publication date: March 26, 2020
    Inventors: Alessandro CATTANEO, Dipen N. Sinha, Todd Andrew JANKOWSKI, James SCHRODT
  • Publication number: 20200088686
    Abstract: Apparatus (10) and methods for making simultaneous measurements of composition (water-cut), fluid flow, and sound attenuation in a multiphase fluid flowing (15) through a pipe (12) in real-time, using the same apparatus (10) are described. Additionally, the apparatus (10) provides real-time pipe wall thickness monitoring for observing pipe corrosion or internal deposition. Knowledge of wall thickness is necessary to correct for water-cut (oil-water composition) automatically by adjusting the liquid path length internal to the pipe (spool). The use of short duration frequency chirp excitation signals (24) enables the apparatus to provide information that can be used to extract multiple levels of information from the same measurement in multiphase fluids including the presence of a significant quantity of gas (˜60% gas volume fraction) in different flow regimes. Besides measuring steady flow, this device is useful for measurements during fast changing flows, such as for a rod-pumped well.
    Type: Application
    Filed: March 20, 2018
    Publication date: March 19, 2020
    Inventors: Dipen N. Sinha, Anirban Chaudhuri
  • Patent number: 10585069
    Abstract: Methods for detection, monitoring, and determination of location of changes in rigid structures with arbitrarily complex geometries are described. Implementations include locating acoustic transducers that generate and receive acoustic signals at multiple locations along a surface of the rigid structure, wherein longitudinal spacing between the transducer locations define measurement zones. Acoustic signals with chosen amplitude-time-frequency characteristics excite multiple vibration modes in the structure within each zone. Small mechanical changes in the inspection zones lead to scattering and attenuation of broadband acoustic signals, which are detectable as changes in received signal characteristics as part of a through-transmission technique. Additional use of short, narrowband pulse acoustic signals as part of a pulse-echo technique allows determination of the relative location of the mechanical change within each zone based on the differential delay profiles.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: March 10, 2020
    Assignees: Chevron U.S.A. Inc., Triad National Security, LLC
    Inventors: Alp T. Findikoglu, Dipen N. Sinha, Daniel R. Chapman
  • Patent number: 10488286
    Abstract: A system, method and device for interrogating a downhole environment in a borehole beneath a surface includes a source of electromagnetic energy, operable to transmit an electromagnetic signal in the borehole, a sensor module, including a passive resonating circuit including a crystal oscillator having a resonant frequency that varies with changes in the condition in the downhole environment to reflect the electromagnetic signal and to modulate the electromagnetic signal in response to a condition in the downhole environment in the borehole and a detector positionable to receive the reflected modulated electromagnetic signal.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: November 26, 2019
    Assignees: CHEVRON U.S.A. INC., LOS ALAMOS NATIONAL SECURITY LLC
    Inventors: M. Clark Thompson, Dipen N. Sinha, Don M. Coates, Jacobo R. Archuletta, Manuel E. Gonzalez
  • Patent number: 10473625
    Abstract: Methods for detecting and monitoring changes in mechanical structures and in walls of pipes, vessels and storage tanks, using muitimode acoustic signal propagation and detection, are described. Acoustic signals having chosen amplitude-time-frequency characteristics excite multiple modes in the structure under investigation, are generated and received at a small number of accessible locations, such as the ends of pipes and the tops and bottoms of vessels and storage tanks, with the inspection region between transmit and receive transducers. Small mechanical changes lead to acoustic scattering and attenuation among the various modes, which are detectable as changes in received signal intensity. Such changes may include material loss, material conversion and material addition. Once the structure is characterized in a known condition, the present method may be used to monitor the structure at a later time to determine whether changes have taken place.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: November 12, 2019
    Assignees: Chevron U.S.A. Inc., Triad National Security, LLC
    Inventors: Alp T. Findikoglu, Dipen N. Sinha, Daniel R. Chapman
  • Publication number: 20190242851
    Abstract: Methods for noninvasive determination of acoustical properties of flowing in pipes having a large ratio (>10) of pipe diameter to wall thickness, and in highly attenuating fluids are described. When vibrations are excited on the outer surface of the wall of a pipe, the resulting vibrations propagate directly through the wall In a normal direction and through the pipe wall as guided waves, appearing on the opposite side of the pipe. This dual path propagation through pipes, where guided waves take the circumferential path in the wall of the pipe and may interfere with the time of-flight measurement obtained from the direct path through the fluid, is at least In part resolved by subtracting the signal from the guided wave from the combined signal, thereby permitting improved observation of the direct path propagation through the fluid.
    Type: Application
    Filed: July 20, 2017
    Publication date: August 8, 2019
    Inventors: Dipen N. Sinha, Cristian Pantea, Blake T. Sturtevant, Anirban Chaudhuri