Electronic nose rapid detection system for sesame oil essence
A detection system and electronic nose technology, which is applied in the field of detection systems, can solve the problems of cycle time and high cost of chemical detection methods, the inability to quickly determine the qualitative or quantitative content of essential oils, and the strong subjectivity of sensory determination methods to meet the detection requirements. required effect
Inactive Publication Date: 2018-01-30
张桂春
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However, these methods, such as colorimetry, spectroscopy, sensory judgment, etc., can qualitatively judge the quality of sesame oil, but the cycle and cost of chemical verification methods are high, and the sensory judgment method is highly subjective, so it is impossible to qualitatively or quantitatively determine the content of sesame oil. quick identification of
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[0017] Such as figure 1 As shown, the electronic nose rapid detection system for essential oil essence is composed of single-chip microcomputer, power supply system, PC, data acquisition card, temperature sensor array and other parts. After the samples to be detected are collected by the sensor array, they are transmitted to the PC through the data acquisition card, and the data is stored on the PC through the labview produced by NI Company, and the neural network is trained in matlab to identify the content of essential oils. Since the gas sensor is sensitive to temperature during the detection process, most of them are detected through the compensation circuit during the measurement process, and Feng Liangdong et al. studied the dynamic response signal of the SnO2 gas sensor under different applied voltages and different duty cycles. The invention uses a single-chip microcomputer to collect temperature during the reaction process, and adjusts the duty ratio of the external v...
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In order to achieve the rapid detection of sesame oil essence, the invention provides an electronic nose rapid detection system for sesame oil essence. The electronic nose rapid detection system mainly comprises a data acquisition part and a data processing part, wherein the data acquisition part combines a gas sensor array and a master computer, and the data processing part trains a 3-layer BP neural network by using Matlab. According to the present invention, during the experiment, eight sesame oil essence samples with different proportions are prepared, neural network training is performedwith a standard sample, and verifying is performed with the tested samples; and the system provides the basis for the study of the rapid sesame oil essence detection method, and has a certain practical value.
Description
Technical field [0001] The invention relates to a detection system, in particular to a rapid detection system of an electronic nose for essential oil essence. Background technique [0002] In recent years, food safety issues have emerged one after another, and "food is the most important thing for the people", so "eating safely and healthily" is the biggest appeal of people in life. Food safety is not only related to personal health, but also related to the physical problems of the next generation. Sesame oil is extracted from sesame seeds and has a special fragrance, so it is called sesame oil. According to the extraction method, it is generally divided into machine-pressed sesame oil and small-milled sesame oil, and small-ground sesame oil is traditional craft sesame oil. Because the market price of sesame oil is higher than that of other vegetable oils, lawbreakers take advantage of the special and strong fragrance of sesame oil, add other vegetable oils to sesame oil a...
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IPC IPC(8): G01N27/00
Inventor 张桂春
Owner 张桂春