| Aquatic products are delicious and nutritious and occupy an indispensable position in the food structure of people in China.However,due to the peculiarity of aquatic products,the quality and safety risks are higher than the general food.As a key link in the quality and safety control of aquatic products,quality inspection is directly related to the immediate interests of consumers.Traditional aquatic product quality testing methods are complex,time-consuming and destructive,and cannot meet the market demand for rapid and non-destructive real-time testing of aquatic products.Raman spectroscopy is widely used in food safety as a non-invasive technology.This study designed and developed a portable non-destructive Raman detection device for quality inspection of aquatic products to achieve rapid detection of aquatic product quality.The specific research contents and results are as follows:(1)The design and implementation of the hardware system of the multi-quality parameters Raman detection device for portable aquatic products.The device hardware system is mainly composed of a light source module,a spectrum acquisition module,a system control processing module,a touch screen,a power module,and a communication module,and a USB2000+ spectrometer is selected as a core device,and the selection of other modules is determined.The S3C6410 is used as the control module microprocessor,and the power supply circuit and the WiFi communication module circuit are designed.The solid structure of the inspection device is designed by SolidWorks 2014,and a set of experimental prototype body was made by 3D printing to realize the portable design of the device.(2)The establishment of a multi-quality indicator prediction model for aquatic products.Determine the color b*,pH,TVB-N,TBA as the quality safety assessment index of aquatic products;select the pomfret as the prediction model of the portable device,and determine the laser power of 300 mW,the integration time is 3000 ms,and the average number of times is 2 times as the optimal detection parameter for the device;the collected spectral data was smoothed and background subtracted by standard normal variate transformation,Whittaker smoothing algorithm,adaptive iterative reweighted penalty least squares algorithm,and combined with the standard physicochemical value of the pomfret color b*,pH,TVB-N and TBA to establish partial least squares prediction models,The correlation coefficients of the validation set were 0.907,0.823,0.915,and 0.897,respectively.The root mean square error of the validation set was 1.315,0.143,2.875 mg/100 g,and 0.104 mg/100 g,respectively.(3)Development of a multi-quality parameters Raman detection portable device software system for aquatic products.Windows CE 6.0 is selected as the operating system of the detection device,and the real-time analysis and control software is designed based on the MFC basic class library,Mixed programming with MATLAB and VS2005 is used to implement data preprocessing and partial least squares modeling algorithm,and cross-compile and download to the detection device to achieve non-destructive testing of multi-quality parameters of aquatic products.The unit has a mass of approximately 2.1 kg and a volume of approximately 190 mm × 170 mm × 70 mm.Finally,the stability and detection accuracy of the device are tested and analyzed,the results show that the hardware and software system of the device meets the design requirements,and the single detection time of the sample is 4s,which can realize the rapid and non-destructive real-time detection of b* color,pH,TVB-N and TBA. |
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