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Of edible quality site rapid detection of key technologies

Author: ZhangJun
Tutor: WuMingZan
School: Nanjing University of Technology and Engineering
Course: Circuits and Systems
Keywords: edible oil detection optical frequency ARM+FPGA Fuzzy-PID Wavelet Analysis evaluation model
CLC: TP216
Type: Master's thesis
Year: 2010
Downloads: 239
Quote: 0
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Abstract


According to the special physical properties that the peanut oil begins to crystallize in 0-5℃in this thesis,using the rapid and lower cost detecting techniques of the absorption spectrophotometric method,I have studied and completed the main key technologies that the detector can detect the peanut oil quality with no using chemical reagents rapidly.The signal acquisition module is a new kind of photometer, it is made up of LED lighting serving as the stable monochromatic source and the optical frequency converter TSL230B serving as the detector derectly, which makes the instrument stable performance, high accuracy, light weight, simple and stesdy structure, suitable for field test.The system uses integrated design of ARM and FPGA.Use FPGA to realize ARM’s interface circuit that FPGA replaces the some conventional control chip and ASIC,which can simplify the hardware circuit of system, reduce the volume of system; at the same time FPGA as the ARM’s coprocessor can share some function, reduce the ARM’ burden, improve system performance and the design flexibility of system.Give the design proposal of the temperature control system based on Fuzzy-PID, complete the hardware and software design of the temperature control system and do simulation and experiment to test it.Using Wavelet Analysis to process detection signals can filter some of the high-frequency noise signals and can detect the break point signals, which gains good filtering effect and improves measuring stability and measuring precision.Collect the signal datas by doing experiment, establish the evaluation mathematics model of the peanut quality by using Wavelet Analysis to process the datas, according to the mathematical model of the quality evaluation embedded in the detector, the detector calculata purity and display it.To sum up, using these key technologies to design the detecetor that can detecet the edible oil rapidly, the whole will be no moving parts, small volume, light weight, high precision, easy to carry and suit for instant and fast detection.

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