Step-shaped gas chamber of multi-sensor electronic nose, double-sample-injection detection system and double-sample-injection detection method

Abstract

The invention relates to the technical field of electronic noses, and particularly discloses a step-shaped gas chamber of a multi-sensor electronic nose and a double-sample-injection detection system and method. A gas chamber cavity part in the step-shaped gas chamber is designed to be stepped, the optimal height and length of an air chamber step are obtained according to a linear programming problem, the space of the air chamber is effectively reduced, and the detection precision is improved. An air inlet and an air outlet of the gas chamber are not in the same horizontal plane, so that carrier gas with large density difference with air can quickly press out air. According to the double-sample-injection detection system and method, by reasonably designing an airflow channel, a control circuit and corresponding control steps, online real-time collection of smell data in the sample processing process (before processing and after processing) can be achieved, real-time analysis can be conducted on the smell data, and the double-sample-injection detection system and method can be directly used for evaluating the quality of tea leaves; and the detection system is based on the step-shaped gas chamber, so that the detection precision is higher, and the analysis result is more accurate.

Description

technical field [0001] The invention relates to the technical field of electronic noses, in particular to a stepped air chamber of a multi-sensor electronic nose, a dual-injection detection system based on the stepped air chamber, and a dual-injection detection method based on the detection system. Background technique [0002] At present, most of the electronic nose air chamber structures based on multi-sensor design are designed as regular containers according to the height of the highest sensor, which will greatly waste the space volume of the air chamber and reduce the detection efficiency of the sensor. The state parameters during the processing of the sample are closely related to the quality of the sample. For example, during the processing of tea, factors such as the temperature and duration of the greening will directly affect the quality of the tea. However, the current gas detection system cannot collect the data before and after the sample processing at the same t...

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Problems solved by technology

[0002] At present, most of the electronic nasal air chamber structures based on multi-sensor design are designed as regular containers according to the height of the highest sensor. This situation will greatly waste the space volume of the air chamber and reduce the detection efficiency of the sensor.

The state parameters during the processing of the sample are closely related to the quality of the sample. For example, during the processing of tea, factors such as the temperature and duration of curing will directly affect the quality of the tea. However, the current gas detection system cannot collect the data before and after the sample is processed at the same time. Realize online real-time collection of odor data during sample processing

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