Abstract
Weighing technology is indispensable to human life, since the ancient times
attention. As a measurement method, have been widely applied in industry,
agriculture, trade and other fields. Along with the development of modern
civilization and progress of science and technology, the accuracy of weighing
technology requirements are increasingly high, electronic products, technology level,
directly influences the level of modernization and professions to improve the
economic benefits of the society. In recent years, the electronic weighing technology
achieved rapid development, electronic weighing in the metrology area also plays
more and more important position, and its applications are constantly expanding.
Especially, because of its commercial electronic with high accuracy, senstive
reaction, simple structure, etc, have been widely applied in industry and commerce
trade, light food, medicine and health, etc. At present, mechanical scales are
gradually replaced by electronic, this has led to the further study of electronic.
This design based on AT89S51 at the core of a high-precision electronic
systems, modular design method and its hardware structure mainly include: the data
acquisition module, the smallest system module, power module, the keyboard and
display module. Among them, the data acquisition module including weighing
transducer and A/D circuit, The minimum system parts including AT89S51 and
extension of external data storage, Keyboard 4X4 by a matrix of the keyboard,
LM4229 LCD display section. Software consists of the C programming language,
realize the control of each part. The electronic can can show the name of the product,
price, quantity and price; etc. Can be finished goods prices. To be able to store some
simple commodity prices, To remind function with overweight. The weighing 5Kg,
range of indexing value for 0.001 g. The entire system structure is simple, easy to
use.
Keywords : electronic, AT89S51, weighing transducer, A/D circuit, LCD display
II
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2022-07-03
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