Comprehensive-Evaluation System Of Walnuts' Quality Based On Virtual Instrumentation

In 21 century, the production of high qualitative and unpolluted farm products is one of the important developing trends of agriculture. Walnut is one of the four nuts in the world and a very important import and export product, so that each country pays more attention to the walnut production and comprehensive evaluation. The synthetic evaluation criterion of walnut is the significant foundation to evaluate the walnut quality and determinate economic value. The evaluation criterion which not only affects the objective accuracy of grading result, but affects the science and technology level's raising in walnut field. However, a man-made weighting marking means has been always used to grade walnut quality in our country. This kind of procedure is burdensome in labors, low in accuracy and backward in testing method.Different varieties and different quality have cause tremendous losses in economy. And this problem will become graver with China entering the WTO, so that it is urgent to carry out the researches on agricultural products quality measurement and comprehensive evaluation system.In view of the foregoing problem, the thesis unites the virtual instruments technique, sense technique and comprehensive evaluates theory to design the comprehensive-evaluation system of walnuts' quality. This paper discusses the hardware and software' design, selection, assembling and debugging. There is special distinguishing feature districting fruit to other fruit feature since the fact that the walnut pertains to the nut. This system is by means of quantitative analysis of walnut shell and other parameters, combining the multivariable statistics in MOCE (Multiple-Objective-Comprehensive-Evaluation) to achieve the scientific evaluation of walnut quality. Especially according to the recently studying by the experts in walnut research field, the inseparable degree of walnut's sutural line possesses the intimate relationship against the walnut quality. So an important measurement is to inspect the walnut's sutural line and to convert it into concrete numeric value. And the forceful scientific foundation shall be supplying in the walnut improved variety breeding along with the quality evaluate.Applying the testing technology and virtual instruments technology to the horticulture research field, especially to the walnut research is very valuable and interesting. Moreover, an automatic grading system of walnut will be built and put into practice if study is continued based on real-time dynamic inspecting, and on-line evaluation system will come into use. In a word, it has great practical value and wide prospects of application.