Abstract
For a very long time, the management of used water of water user relies on man-made
style, that need operators to arrive at user’s home to collect fees or users reach appointed
place to hand in fees by themselves. This traditional style has lots of disadvantages such as
needing many operators, time consuming and low efficiency.Further more problems like
arrears, dragging on water fees etc. always appear. In order to solve these problems, this
paperdesigns an intelligent IC card water meter control system based on the single-chip
computer. The core of thesystem is asingle-chip microcomputer AT89C2051, the wiegand
sensoris used to measure water consumption, the managements of water purchasing and
consumption are realized by IC card’s writing, reading and encryptiontechnology.
This paper has finished the systematic hardware circuits design and software design.
Hardware circuit adopts module design, including water flow measuring circuit, IC card
interface circuit, electromagnetic valve urge circuit, warning circuit, LED display circuit,etc.
The working principles of every module are analyzed in details. The software of the system is
finished in assembler language, the flow charts are provided.
The system has many functions such as supplying or cutting off water automatically,
intelligent recognition of IC card and user’s identity verifying, power-fail protection, LED
display, intelligent switch control of electromagnetism valve etc. It also can prevent the
system from disturbance and disassembling.
Keywords：Single-chip computer；Wiegand sensor；IC card；Intelligent water meter；
low power consumption
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