Removable portable electronic nose for onsite rapid detection of agricultural products

Abstract

The invention discloses a removable portable electronic nose for onsite rapid detection of agricultural products. The removable portable electronic nose comprises a removable portable smell sampler and a signal processing and controlling system; the removable portable smell sampler comprises a sensor array, a small tubular air chamber, a sampling performer and a sampler shell; the signal processing and controlling system comprises an embedded digital processing system and a touch display system; the embedded digital processing system includes a digital signal processor DSP, a gas passage control module and a signal processing circuit; and the touch display system comprises a TFT color liquid crystal screen having a touch function and a human-computer interaction interface. Gas fingerprint information acquired by the DSP is displayed by the TFT color liquid crystal display to make detection intuitive. The removal portable smell sampler can be replaced for different detection objects, so the detection accuracy is improved, and the removable portable electronic nose is applicable in the field of onsite rapid detection of the agricultural products.

Description

technical field [0001] The invention relates to a detachable and programmable electronic nose for on-site quick detection of agricultural products, belonging to the field of detection of agricultural products. Background technique [0002] In the field of agricultural product detection, the application of electronic nose is more and more extensive. It uses the cross-sensitive gas sensor to obtain the "fingerprint" information of the sample to identify and quantify the volatile gas of the sample to be tested. At this stage, the electronic noses that are widely used are often desktop devices, which are bulky, not easy to carry, and need to rely on PCs for pattern recognition algorithm calculations. In the application of agricultural product detection in mobile environments, it is often necessary to collect relevant gas information data on site and then Reuse of PC for processing does not have the ability of on-site rapid detection. [0003] At present, many scholars have devo...

AI Technical Summary

Problems solved by technology

The portable electronic noses disclosed in the invention patent application (CN101226166A) and the invention patent application (CN103728348A) respectively, which can work independently from the PC, use LED or LCD displays with small display areas to display the information in the detection process, and the information structure is single , and a large number of mechanical keys are used, which not only increases the complexity of the hardware circuit, but also does not have good stability

At the same time, the above two patent applications integrate the odor sampling module and the signal module, so that for different application objects, it is not convenient to use different sensor arrays for corresponding detection, which limits the range of electronic nose detection objects to a certain extent.

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