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 . The TRM response in the presence of an analyte varied with TRM and various analytes have been identified using principle component analysis . 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.
|Commitee:||Ismail, Yasser, Belu, Radian|
|School:||Southern University and Agricultural and Mechanical College|
|School Location:||United States -- Louisiana|
|Source:||MAI 81/1(E), Masters Abstracts International|
|Keywords:||Amorphous, Chemical, Coil, Instrumentation, Magnetoelastic, Sensor|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be