An olfactory simulation instrument and an on-site analysis method for the gas (smell) taste level of specific substances

An instrument and olfactory technology, applied in the field of olfactory simulation instruments and on-site analysis of gas (smell) taste grades of specific substances, can solve problems such as response differences, and achieve the effects of large gas-liquid ratio, comprehensive feature extraction, and large volume.

Active Publication Date: 2017-09-12
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

Through a lot of experiments, we found that simply replacing the old gas sensor with a new one of the same model is not enough; even two new gas sensors of the same model have obvious differences in their response to the same gas

Method used

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  • An olfactory simulation instrument and an on-site analysis method for the gas (smell) taste level of specific substances
  • An olfactory simulation instrument and an on-site analysis method for the gas (smell) taste level of specific substances
  • An olfactory simulation instrument and an on-site analysis method for the gas (smell) taste level of specific substances

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Embodiment Construction

[0099] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0100] figure 1 It is the present invention-a kind of olfactory simulation instrument-basic principle block diagram. The instrument uses multiple gas sensors with overlapping performance to form an array to imitate a large number of olfactory receptor cells in the human nose, uses pattern classification and prediction models to simulate human logic and image thinking, and combines precision testing technology, computer technology, multivariate analysis and various An intelligent real-time olfactory simulation system is constructed with the technology in the specific field. In the learning stage, the olfactory simulation instrument tests the volatile gases in the headspace of various odorant samples with known odor (smell) and taste grades and categories, and obtains various traces and traces of the odor (smell) and taste one by one. The comprehensive sensit...

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Abstract

The present invention - an olfactory simulation instrument and a method for on-site analysis of the gas (smell) taste level of specific substances, one of the characteristics, the test box integrates a gas sensor array constant temperature studio, a computer and an automatic sampling system; the second characteristic, 250 ml The sample bottle and 25ml of the sample to be tested make the gas-liquid ratio reach 9:1; the third feature is that the parallel resistance wire is wound in half a circle to generate 45 watts of power, and it only takes 8 minutes to heat the sample and headspace volatile gas to 80°C, and the constant temperature is 30°C. Minutes; feature four, use 25 ml of 100ppm ethanol aqueous solution to generate a standard reference gas in a 250 ml sample bottle, based on which the gas sensor is calibrated in time; feature five, the headspace sampling flow rate is 500 ml / min, and the sampling time is 30 seconds. The response signal of the gas sensor is preprocessed by low-pass filtering and dimension reduction; the sixth feature is to establish a database, and the olfactory simulation instrument can conduct on-site detection and grade prediction and identification.

Description

technical field [0001] The present invention - an olfactory simulation instrument and a method for on-site analysis of the gas (smell) taste level of specific substances, relates to the fields of computer, precision measurement, automatic control, precision machinery, analytical chemistry, and applied mathematics, and mainly solves the problems of adhesives, petroleum wax, leather, glycerin On-site analysis of gas (smell) and taste grades of specific substances such as edible vegetable oil, including precision high temperature and constant temperature of the measured sample and headspace volatile gas, large-capacity headspace volatile gas generation, optimal liquid-gas ratio, large flow precision automatic top Empty sampling, signal preprocessing, feature selection and extraction, quantitative analysis of gas (smell) and taste. Background technique [0002] The application objects of the present invention are mainly adhesives, petroleum wax, leather, glycerin, edible vegetab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00
Inventor 高大启王吉蔡超前
Owner EAST CHINA UNIV OF SCI & TECH
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