All-digital Refrigerator Temperature Detection System

With the development of science and technology, people' s demand for the quality of frozen food is increasingly improved. How well the food looks and to what extent it keeps fresh is closely related to the freezing temperature. The temperature required, however, varies from food to food. The length of time taken to freeze food regulates the temperature accordingly. Therefore, a need seems to be great to work out a temperature-measuring system for freezers, which should be more effective and practical.Drawing on the analysis of the features presented by various temperature sensors and the central line of operation, this paper suggests that a temperature-measuring system for the freezer be set up. As a result of this suggestion, the system is made possible with the characteristics of simplicity, stability , accuracy and visibility.In addition to studying the principles underlying the measurement of temperature by the digital sensor DS1820, this paper also provides a better calculation of its measuring accuracy and an improvement of its working efficiency. To meet the needs of teledata transit, the digital transmitting techniques are applied to the system, the power line carrier wave tele-circuit with a bus transfer interface is supplied, and what's more, a detailed introduction is given to illustrate the operation. The design of central operating interface adopts a process of graphic software to have the cubic graphs embedded in VB, which brings the images on the screen more closely in appearance to the reality, producing consequently an intuitive effect.Thi s system not only caters for the needs of various kinds of frozen food but proves to be energy-saving, efficient and effective, practical and applicable.