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US 11,442,051 B2Granted
Method and device for identifying sample using chemical sensor
AssigneeNational Institute for Materials Science
InventorsGaku Imamura, Genki Yoshikawa, Takashi Washio
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Abstract
Provided is a novel analysis method which, when a chemical sensor is used to perform a measurement, makes it possible to identify a sample without controlling or monitoring a change in the time the sample is introduced. According to the present invention, a sample can be identified without knowing a change in the time the sample is introduced, by using a chemical sensor having a plurality of channels each having different characteristics to perform a measurement, and performing an analysis on the basis of responses obtained from each channel.
Claims13
A sample identification method using a chemical sensor, comprising:
- inputting an unknown sample, according to an identical time-varying first function, to a chemical sensor comprising a plurality of channels each having a peculiar transfer function, thereby obtaining, from the plurality of channels, a plurality of time-varying sensor signals each descriptive of the unknown sample through the corresponding transfer function;
- inputting a known sample, according to an identical time-varying second functions, to the same chemical sensor comprising the plurality of same channels each having the same corresponding transfer function, thereby obtaining, from the plurality of channels, a plurality of time-varying sensor signals each descriptive of the known sample through the corresponding transfer function;
- performing one of a first comparison and a second comparison, wherein the first comparison (a) determines a relationship between a sensor signal descriptive of the unknown sample from a respective at least some channels and a sensor signal descriptive of the known sample from the corresponding channel, and (b) compares a determined relationship with another determined relationship among at least some of the determined relationships, and
- the second comparison (a) determines a relationship between a sensor signal descriptive of the unknown sample from one channel among at least some of the channels and a sensor signal descriptive of the unknown sample from another channel from the at least some of the channels, (b) similarly determines a relationship between a sensor signal descriptive of the known sample from one channel among the at least some of the channels and a sensor signal descriptive of the known sample from another channel from the at least some of the channels, and (c) compares a respective at least some of the determined relationships between sensor signals descriptive of the unknown sample with the corresponding, determined relationship between sensor signals descriptive of the known sample;
- and
- estimating the unknown sample to be the known sample, based on similarity between the relationships compared in one of the first and the second comparisons.
3 more elements
A sample evaluation method, comprising:
- providing a sensor having a plurality of channels, wherein a behavior of each channel is expressed by a combination of a uniform sample input function and a transfer function that is unique to each channel and responds differently to a different sample;
- subjecting a known sample to the sensor and obtaining a first response of a transfer function to the known sample with respect to a respective at least some of the channels;
- subjecting an unknown sample to the sensor and obtaining a second response of a transfer function to the unknown sample with respect to the respective at least some of the channels;
- performing one of a first comparison and a second comparison to evaluate whether the unknown sample is identical to the known sample, wherein
- the first comparison comprises:
- relating a first response and a second response of a corresponding channel to determine a first relationship between them with respect to a respective at least some of the channels subjected to with the unknown sample and the known sample;
- and
- comparing a determined first relationship and another determined first relationship with respect to a respective at least some of the determined first relationships to determine correlations among the at least some of the determined first relationships;
- the second comparison comprises:
- relating a first response to another first response to determine a second relationship between a pair of channels with respect to a respective at least some of the channels subjected to with the identified sample;
- relating a second response to another second response to determine a third relationship between a pair of channels with respect to the respective at least some of the channels subjected to with the unknown sample;
- and
- comparing a determined second relationship and a determined third relationship of a corresponding pair of channels to determine correlations among at least some of pairs of the channels;
- and
- evaluating the correlations from one of the first and second comparisons to determine whether the unknown sample is identical to the known sample.
12 more elements
Dependencies are inferred from the claim text.