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Dissertation/Thesis Abstract

Miniaturization of Chemical Identification by Magnetoelastic Sensing (ChIMES) Technology
by Dabels, Yeshak A., M.Eng., Southern University and Agricultural and Mechanical College, 2018, 58; 13421559
Abstract (Summary)

The Miniaturization of a Chemical Identification by Magnetoelastic Sensing (ChIMES) technology is hereby presented. The sensor is designed to detect and identify a broad range of gaseous analytes using a single or array of sensors located in a flow tube. The sensor is capable of untethered communication through metallic or nonmetallic barrier. This gives the sensor a unique feature that provides many capabilities for interrogation where proliferation of the sample environment is not possible due to health, safety, legal, or environmental concerns. As the analyte flows through a tube containing a sensor array (sensors constructed of an amorphous wire sensing element and a target response material (TRM)), the TRM absorbs the analyte which will typically swell imposing stress on the amorphous wire embedded in the core of the sensor. As the TRM applies pressure to the amorphous wire, the wire's magnetic permeability changes, which is sensed by the ChIMES system instrumentation. Since each sensor in the array is designed to respond differently to various analytes, the specific analyte and its concentration can be determined by analyzing the rise time, fall time and amplitudes of the various sensors. Dr. David Mee demonstrated the ChIMES technology at the Y12 plant using an electronics package housed in an enclosure the size of a carry-on piece of luggage [3]. The TRM response in the presence of an analyte varied with TRM and various analytes have been identified using principle component analysis [2]. The objective of this work is to reduce the size of this electronics package so that a handheld version of the ChIMES system could be constructed.

Indexing (document details)
Advisor: Lacy, Fred
Commitee: Ismail, Yasser, Belu, Radian
School: Southern University and Agricultural and Mechanical College
Department: Electrical Engineering
School Location: United States -- Louisiana
Source: MAI 81/1(E), Masters Abstracts International
Subjects: Electrical engineering
Keywords: Amorphous, Chemical, Coil, Instrumentation, Magnetoelastic, Sensor
Publication Number: 13421559
ISBN: 9781085561976
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