Olfactory analog instrument-oriented gas sensor selection, replacement and correction method

Abstract

The invention discloses an olfactory analog instrument-oriented gas sensor selection, replacement and correction method. The method is characterized in that a standard liquid-state sample, standard headspace volatile gas and a standard testing condition are determined; the most sensitive gas sensors or the gas sensors with the maximum differences are selected from a plurality of gas sensors of the same type according to the size of steady-state voltage response of the standard headspace volatile gas to form a gas sensor array; a gas sensor replacement standard and method based on the relative error for the steady-state response of the standard headspace volatile gas are determined under the long-term working condition; a timely correction method for each gas sensor is provided for the long-term working condition; the gas sensor is easily and practically selected, replaced and corrected on the basis of the existing olfactory analog instrument. The problem of initial selection of a plurality of gas sensors in the olfactory analog instrument and the problems of correction and replacement caused by reasons such as baseline drift, poisoning and damage within the life period of the instrument are solved.

Description

technical field [0001] The present invention-a gas sensor selection, replacement and calibration method for olfactory simulation instruments, relates to the fields of computer, precision measurement, automatic control, and precision machinery, and mainly solves the problem of the same type of gas sensor in the gas sensor array of olfactory simulation instruments Selection, replacement and calibration issues, specifically including: standard liquid sample selection, standard headspace volatile gas generation, determination of standard test conditions, judgment of the difference in sensitivity of the same model gas sensor, replacement and calibration of new and old gas sensors of the same model, gas sensor of the same model Sensitive sensors are calibrated online. Background technique [0002] In the 1930s, it was discovered that metal oxide semiconductors have a gas-sensing effect. The resistance of this type of material changes with the type and concentration of the gas in ...

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Problems solved by technology

[0018] In order to achieve the above object, the present invention—a gas sensor selection, replacement and calibration method for olfactory simulation instruments—adopts the existing olfactory simulation instruments, and mainly solves the selection of the same type of gas sensor in the gas sensor array of the olfactory simulation instrument, Replacement and calibration issues, specifically including: standard liquid sample selection, standard headspace volatile gas generation, determination of standard test conditions, judgment of the difference in sensory performance of the same model of gas sensors, replacement and calibration of new and old gas sensors of the same model, gas sensors of the same model Online Correction Problems

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