| 1. IntroductionPaper, as the main material printing, how is its performance , determine to print black quality. Only the good performance paper, could get the better seal product and present the color result . And the quality of paper performance , is to show that came out by the major indicator including smoothness degree of the paper. So, determine smoothness degree of the paper correctly, present the relation of color according to the performance of the paper and seal product , and print the products, process conditions characteristic, choose the paper to be printed rationally, to improving the realistic meaning with importance of product quality.In addition, the level and smooth degree of paper not good is apt to cause the black to grow dim while printing, layout picture line level sense bad, suck black quantity heavy, trace dry and slow and printing plate wear and tear bad phenomenon soon,etc.. Bekk type level and smooth degrees of survey law present national standard, copies of paper level and smooth degrees of measure apparatus used survey method too.Therefore, level and smooth degree is regarded as an important index of measuring the performance of the paper, the accurate and fast one determines it, it is that several work of printing the paper etc. is essential .With the development of the popularization of the computer and information technology, people are higher and higher to the level and smooth degree of survey systematic request of the paper. Every domestic manufacturers put forward one's own developmental research plan one after another in recent years, aim at and utilize computer, information processing and automatically control,etc. modern new and high technology come and design paper level and smooth degrees of systematic survey, meet various kinds of requests. 2. Major content of the thesisWidely used as the sign in the field of level and smooth degree of survey of paper with microelectric technique , detection technique , automatic control technology and computer technology, paper level and smooth degree of precision and speed of survey ,etc. have presented considerable development. The level and smooth degree of survey of paper had been systematic already from the past simple , coarse measuring system, develop into and measure , show automatically automatically that the paper which measures the result is systematic in level and smooth degree of survey today.This system level and smooth degrees of survey whether one collect signal measure , transmit , deal with and control to the integrative control system, have represented current level and smooth systematic developing direction of degree of survey of paper. This system function and characteristic has realized:First of all, have realized that can measure the analog signal of degree of smoothness of the paper rapidly . Secondly, systematic dependability is good. If level and smooth degree good paper examine level and smooth degrees of kind paper very by mistake, will cause being the apt while printing cause not black grow dim, suck quantity not black the heavy, trace the dry and slow and last bad consequence fast,etc. printing plate, bring losses to customer. The level and smooth value of degree has appeared in the measuring that must be accurate.Third, along with the modernized big production development, toprinted the product the production speed to propose the more and more high request, this paper smoothness machine has realized the rapid survey function. This system through provides lets the user operation the choice, may survey within 300 second within paper smoothness survey, select the small volume cavity survey, the survey time only has the great volume cavity 1,/10, greatly saves the survey time, the realization rapid survey.Fourth, this system realization man-machine contact surface conforms to the requirement. To operate the machine easily for the person have the market prospect, the man-machine contact surface realization prompt operator should make any, as well as how does each kind of step. Through...
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