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Smell measuring devices

A technology for measuring devices and odors, applied in the field of odor measuring devices, can solve problems such as difficult to determine exactly, difficult to intuitively understand similarities, etc.

Inactive Publication Date: 2003-09-03
SHIMADZU SEISAKUSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) Since the sensitivity of the odor sensor is not always consistent with the sensitivity of the human nose, therefore
[0009] (3) It is difficult to intuitively understand the similarity between one odor and multiple standard odors
[0010] (4) Even when two odors are distinguishable, it is often difficult to determine with certainty whether they are

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0059] Embodiments of the first odor measuring device according to the present invention will be described below with reference to the accompanying drawings.

[0060] like figure 1 As shown, the odor measuring device of the first embodiment comprises the following elements: a suction port 1, which is used to suck a sample; a preconditioner 2, which is used to preprocess the sucked sample; a sensor chamber 3, which has six different response characteristics Odor sensor 31-36 of, is used for measuring unknown sample or comprises the standard sample of standard odor component; Pump 4, is used for unknown sample or standard sample sucked into sensor chamber 3; Signal processor 5, is used for analyzing odor sensor 31- 36 detection signal; display 6, used to display analysis results; controller 7, used to control the overall operation of the device.

[0061] The preprocessor 2 removes moisture from the sample, concentrates or dilutes the sample, removes interfering gases, and the l...

example 1

[0083] In this example, the odor measuring device of the first embodiment was used for the measurement of odor. For the measurement of odor, the following eight standard odors are preferably used as a mixture of standard odors: including aromatic series (such as toluene), alcohols (such as n-butanol), hydrocarbons (such as heptane) and esters ( Four kinds of aromas such as acetate); four odors including amines (such as trimethylamine), aldehydes (such as butyraldehyde), sulfides (such as methyl mercaptan) and organic acids (such as butyric acid).

[0084] Figure 5 A six-dimensional sensor odor space illustrating measurements of the eight standard odors and unknown samples above is shown. Figure 6 A table is shown illustrating the results of the above identification process using odor vectors showing the similarity, odor index and odor intensity of unknown sample odors for each standard odor. A simple representation of this table will make it easier to understand that the o...

no. 2 approach

[0097] The implementation of the second odor measuring device according to the present invention will be described below with reference to the accompanying drawings.

[0098] Figure 11 is a block diagram illustrating the structure of the odor measuring device of the second embodiment. This odor measuring device has the same structure as the first embodiment except for the signal processor 8 . Therefore, the same numerals as used in the first embodiment are used to designate the same components, and these components will not be described in detail. The signal processor 8 that mainly constitutes with a personal computer has the following functional blocks: a peak detector 81, a standard odor coefficient calculator 82, a standard odor coefficient memory 83, an index calculator 84 and an olfactory critical memory 85.

[0099] The measurement principle of the odor measuring device of the second embodiment will be explained below. For the convenience of understanding, only the t...

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PUM

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Abstract

The present invention proposes an odor measuring apparatus capable of determining the similarity of the odor of an unknown sample with high objectivity and performing measurements with sensitivity similar to that of the human nose. According to a mode of the invention, an m-dimensional space is created from detection signals of m pieces of odor sensors, and a standard odor vector S1 representing the result of measurement of a standard odor and another vector Sx representing the result of measurement of an unknown sample are drawn in the space. Then, from the angle between the two vectors, a degree of similarity is determined within the range from 0 to 100%, where the degree of similarity is corrected taking account of the difference in sensitivity between the odor sensor and the human nose. The degree of similarity of the unknown odor is calculated for each of plural standard odors measured beforehand, and which standard odor is the closest to the odor of the unknown sample is objectively shown by numeral values.

Description

technical field [0001] The present invention relates to an odor measurement device for measuring and analyzing odors (aroma, aroma, odor, etc.), which is used for identifying unknown odors and measuring the intensity of the odors. The invention is applicable to devices in various fields, such as devices for measuring odor or devices for inspecting and / or evaluating the quality of food or medicine. Background technique [0002] Traditionally, the identification and evaluation of odors has been performed through the human sense of smell. When using this approach, it is important to consider that different people (or groups) have different olfactory sensitivities, and that a group's sense of smell may vary depending on the group's minor factors (e.g., mood, alertness, health, etc.), or depend on Varies with the date of testing. Therefore, in order to obtain objective results with high systematic accuracy, it is necessary to gather a sufficient number of groups and conduct the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12G01N5/02G01N33/00G01N33/02
CPCG01N33/0031G01N7/00
Inventor 岩崎好阳喜多纯一赤丸久光青山佳弘谷口博和
Owner SHIMADZU SEISAKUSHO CO LTD
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