Tech4Imaging LLC and Infrastructure Preservation Corporation | Date: 2014-12-09
The present invention provides a system and apparatus for inspecting tendons and cable stays in bridges and structures using multi-frequency excitation of an ECVT sensor.
Tech4Imaging LLC | Date: 2014-02-27
A control system and data acquisition system for an electrical capacitance tomography sensor comprised of a sensor having a plurality of electrodes, where each electrode is further comprised of a plurality of capacitance segments. Each of the capacitance segments of each electrode can be individually addressed to focus the electric field intensity or sensitivity to desired regions of the electrodes and the sensor.
Tech4Imaging LLC | Date: 2015-05-07
The present invention provides a high resolution Spatial-Adaptive Reconstruction Technique (SART) for use with Adaptive Electrical Capacitance Volume Tomography (AECVT).
Tech4Imaging LLC | Date: 2016-04-26
The present invention provides a system and method for multi-phase flow decomposition using electrical capacitance imaging techniques. The present invention provides a system and method to obtain permittivity distributions at a plurality of frequency markers using volume tomography image reconstruction to determine volume fraction of each phase and to produce images of the volume fraction for each phase.
Agency: National Aeronautics and Space Administration | Branch: | Program: SBIR | Phase: Phase II | Award Amount: 750.00K | Year: 2016
In this proposed effort, we will develop a prototype product of a higher resolution ECVT system based on multi-phase decomposition for a two phase flow with water as the liquid phase, namely a phase separator. The intrinsic high measuring speed of capacitance measuring technology and potential high resolution capability of multi-phase decomposition will enable phase imaging at resolution better than the 2~3 mm specified by the topic description. Simulation and measurement results were used to verify this approach in Phase I. By the end of this Phase II, a prototype system that can image Air and Water phases in a phase separator with high accuracy, angular and vertical velocities of water layer, and water mass flow will be demonstrated. The developed prototype will serve as a deliverable to NASA by the end of this Phase II. It will be composed DAS unit, modular ECVT sensors, and reconstruction software. The proposed deliverable will be a working unit in form, fit, and function for phase separator experiments. It will also be suitable for utilization in the International Space Station after flight hardening. Flight hardening is not part of this effort.
Agency: National Aeronautics and Space Administration | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 125.00K | Year: 2015
The proposed innovation aims at using Electrical Capacitance Volume Tomography sensors (ECVT) for decomposing components of a multi-phase flow into separate phases, electronically. Here, each phase would be imaged and measured independently for accurate assessment of phase boundaries, phase velocity, and phase hold-up or distribution. This innovation is based on exploiting the dependence of electric properties of several materials on excitation frequency at which electrical capacitance is measured. Dielectric and conductivity values of liquids often undergo changes as the excitation frequency used in acquiring capacitance values is changed. For example, previous studies quantified the change in dielectric constant and dielectric loss of aqueous liquids, including de-ionized water, under different frequencies. Their findings show that such liquids often undergo significant changes in electrical properties with varying excitation frequencies. Typically, ECVT sensors are excited at frequencies in that range of tens of Khz to tens of Mh. At those frequency ranges, the electric properties of materials, especially those that contain water in multi-phase flow mixture, undergo significant changes.
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase II | Award Amount: 1.01M | Year: 2015
Advanced noninvasive sensors for controlling and optimizing power generation systems are being developed here. Controlling emissions and increasing efficiencies are essential requirements in such future advanced power plants. Herein, next generation power systems require greater flexibility in their operations for meeting the higher efficiency and lower emissions conditions that are geared toward meeting consumer demand and adhering to increased regulatory standards, simultaneously. Devices that can accurately measure the solid flow rate of an operating gas-solid system would be of great aid for optimizing and controlling the combustion processes in advanced reactors. Presently, the availability of such devices, particularly at high temperatures, is very limited. In this Phase II effort, we will build a functional prototype of an Adaptive Electrical Capacitance Volume Tomography (AECVT) system for mass-flow gauging of solids circulating at high temperatures. The intrinsic high measuring speed of capacitance measuring technology and high resolution capability of AECVT technology will enable such mass flow measurements at 5% spatial resolution and 1 Hz temporal resolution. Simulation and preliminary measurement results have verified feasibility of the AECVT architecture, as documented in the attached final report of Phase I. Capacitance sensors exhibit favorable features of safety, flexibility, and suitability for scale-up applications that make them a favorable solution for industrial applications. Tasks in this Phase II will focus on optimizing sensors, electronic hardware, and feature extraction software for hot flow applications based on AECVT technology. Tasks are based on Logical progressions from past experience of developing imaging systems. Successful completion of this Phase II will provide a prototype of an AECVT system for hot temperature applications in harsh conditions reactors that can be extended to many energy-related applications. A logical progression from Phase I to Phase II is established in which Phase II efforts are focused on implementing designs developed on Phase I that proved feasible. The proposed system would also advance multi-phase flow research of hot systems by providing access to obscure locations of a flow system. It also has a very high potential of attracting commercial interests as the need for advanced instrumentation is imminent to address the increased sophistication of advanced power plants. This would also benefit the public by spurring economic growth.
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 150.00K | Year: 2014
Solid mass flow rate is a critical parameter of Circulating Fluidized Bed combustors that are deployed in many energy generation processes. Available devices that can accurately measure the mass flow rate are very limited. Next generation power systems require such measurements for greater flexibility in their operations, and for meeting the higher efficiency and lower emissions conditions. In this proposed effort, we will establish the feasibility of an Adaptive Electrical Capacitance Volume Tomography (AECVT) system for mass-flow gauging of solids circulating at high temperatures. The intrinsic high measuring speed of capacitance measuring technology and high resolution capability of AECVT technology will enable such mass flow measurements at 5% spatial resolution and 1 Hz temporal resolution. In AECVT, the number of independent capacitance measurements is increased through reconfigurable synthetic plates that maintain the minimum area requirement of plates in a capacitance sensor. Adaptive plates are composed of many small segments, each activated by a different level of excitation voltage. The total area of the segments combined is equivalent (or close) to that of a conventional ECVT plate. However, the voltage patterns introduced to the adaptive plate through different segment excitations are able to form new independent capacitance sensitivity measurements. Simulation and measurement results will be used to verify the AECVT system proposed here. In advanced power generation technologies that rely on solid circulation for combustion (i.e. Chemical Lopping), online monitoring of mass-flow rate, flow progression, and distribution is essential. Successful completion of this Phase I will establish the groundwork for full development of an AECVT system for hot temperatures in harsh conditions reactors by the end of Phase II. The work planed in Phase I is structured to adequately match the requested funds. A logical progression from Phase I to Phase II is devised in which Phase I efforts are focused on simulating capacitance sensors at various arrangements of excitation voltage and flow variables, ensuring soundness of the approach, and on developing measuring circuits for this adaptive technique. Phase II tasks will be planned toward a full realization of an AECVT system for hot flow applications in Circulating Fluidized Bed combustors. Successful completion of this project will also result in significant public benefit due to the potential of this technology in helping the energy industry increase efficiencies and lower emissions. The proposed system would also advance multi-phase flow research. It also has a very high potential of attracting commercial interests as the need for advanced instrumentation is imminent.
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase II | Award Amount: 1.00M | Year: 2014
Advanced power plant instrumentation is being developed here to help increase efficiencies and lower emissions of power generation processes. This instrumentation is based on developing capacitance sensors, which can withstand harsh conditions, to provide 3D imaging of flow characteristics in high temperature reacting systems.
Tech4Imaging LLC | Date: 2015-06-22
A flexible capacitance sensor having multiple layers for communicating signals to a data acquisition system for reconstructing an image of an area or object located in a subject being sensed, the flexible capacitance sensor having a flexible layer of capacitance plates; a flexible shielding ground layer next to the layer of capacitance plates; a flexible layer of signal traces next to the shielding ground layer, where the layer of signal traces has a plurality of trace lines; and where the capacitance sensor is flexible and adapted to be wrapped around the subject being sensed. The sensor is adapted to communicate signals via the plurality of trace lines to a data acquisition system for providing an image of the area or object between the capacitance plates.