Multimedia Computer-aided Design System For Small Mechanical And Electrical Irrigation Area

With the using of Microsoft Visual Basic 6.0, a multimedia computer-aided design system of small type pumping irrigation district is developed in this paper.Provided with the live multimedia messages as well as a good man-machine conversation mechanism, this system can help the user to finish the planning of an pumping irrigated area such as the layout of canal system, the selection of pump models, the establishment of the irrigation program, the calculating of canals' parameters, the estimate of the project magnitude, the selection of the field constructions, the economic analysis of the project, the output of results, etc,A new OO (Object Oriented ) programming method is adopted in this system,various Softwares are integrated in this systems as well by the "Automation" technic provided by VB, in addition, the multimedia technic is applied to this system for the first time, it makes the system easy to ope rate .As for the optimization of the canals' section, a new optimization method is adopted based on the existing theories about the canals' section, and in this way, with the purpose of minimizing the project's investment as well as a stalized canal, limited by the longituding slope, the canals' best feasible parameters can be deduced.Furthermore, a integral method to reckon the earth work is developed in this paper, by this way , the estimate precision of the earthwork is enhanced notably.This paper includes the particular illumination for the developing procedure of each systems' segment, and in the end, the directions of the system are demonstrated in a sample area which lies in the Zhaija village, Taizhou City, Jiangsu Province, the running results showed that the initial purposes are achieved effectively, and it has a preferable practicability.