University of Connecticut

United Technologies Corporation

University of Massachusetts

Zhaoyan Fan

Robert X Gao

Lance L Smith

Jeffery A Lovett

David O Kazmer

Jian Cao

A method for operating a sensor, including simultaneously exciting a first set of electrodes and sensing an output of each electrode of a second set of electrodes, storing output data corresponding to the output of each electrode of the second set of electrodes in a memory storage device, shifting at least one electrode from the first set of electrodes to the second set of electrodes and at least one electrode from the second set of electrodes to the first set of electrodes, and repeating the simultaneously exciting and sensing, the storing, and the shifting until an output data has been stored for each possible pair of electrodes in the first and second set of electrodes.

Multiple-excitation multiple-receiving (MEMR) capacitance tomography

A method of determining a spatial and temporal pressure distribution profile on an outer surface of a rotating apparatus includes producing one or more pressure indications in response to pressure applied to the outer surface of the rotating apparatus. The producing is carried out by a transducer assembly embedded within the rotating apparatus at a distance d from the outer surface of the rotating apparatus. The method further includes sampling, by an acquisition assembly, the one or more pressure indications from the transducer assembly and storing the sampled one or more pressure indications. The method also includes processing the one or more pressure indications to produce the pressure distribution profile describing the pressure applied to the outer surface.

Methods and apparatus for monitoring microrolling processes using embedded sensing

In an injection molding process, it can be difficult to detect, in real time, process control variables such as pressure and temperature. Traditional temperature detectors and pressure sensors can be difficult to place in or near a mold cavity. An example embodiment of the present invention includes a self-powered multivariate sensor and uses acoustic transmission. The sensor may employ an infra-red thermal detector and pressure sensor and transmit coded representations of measurements acoustically via a body of the mold. From the temperature and pressure, melt velocity and melt viscosity of a compound in the mold can be determined with a high degree of accuracy by a processor internal to or external from the sensor. The example embodiment maintains structural integrity of the mold, provides a wireless self-powered sensor, and makes available sensing of properties of the viscous compound to enable injection molded parts production at a success rate exceeding 90%.

Method and system for multivariate remote monitoring of polymer processing

Disclosed herein is a novel sensing technique, termed Multiple Excitation Capacitance Polling (MECaP), that improves the efficiency of Electrical Capacitance Tomography (ECT). Unlike traditional alternating current techniques, where excitation signal is applied to an electrode one at a time, MECaP involves simultaneously applying multiple excitation signals, in a progressively increasing fashion, to multiple electrodes on an ECT sensor. The received signals are filtered or otherwise decomposed (e.g., Fourier transformed) into different components, and the individual components are used to generate an image of the article or substance disposed between the electrodes. Because multiple capacitances can be simultaneously measured as a consequence, scanning with MECaP can significantly increase the image scanning speed. For example, scanning with MECaP may enable frames rates of tens of kHz for imaging dynamic processes such as engine combustion.

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Willimantic, CT, United States of America

Zhaoyan Fan