Boots – shoes – and leggings
Patent
1990-12-04
1993-08-24
Teska, Kevin J.
Boots, shoes, and leggings
73 2335, 364499, G06F 1546
Patent
active
052394832
ABSTRACT:
A device for detecting the presence of a chemical material, such as a gas, amongst a number of incident chemical materials comprises a group of sensors having overlapping broadband selectivities in respect of the incident materials, so that each sensor responds, to a greater or smaller extent, to each of the materials. The sensor outputs are fed to a signal processor which produces, for each material, a notional vector. These vectors are compared with stored reference vectors to identify the material under investigation. The responses to the various materials have a time-varying portion and a portion of constant value. Certain materials may produce the same constant value, but different time-varying portions. The latter portions are therefore also taken into account in identifying the materials. A chromatographic layer may be provided over the sensors to distinguish between chemical species in the materials under test.
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Electronics and Wireless World, Feb. 1989, pp. 178-180; "Intelligent Odour Discriminating Nose".
Analytical Chemistry, vol. 59, No. 11, Jun. 1987, pp. 1529-1534, Washington, D.C., W. P. Carey et al., "Multicomponent analysis using an array of piezoelectric crystal sensors".
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Teska Kevin J.
The General Electric Company p.l.c.
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