关键词:单片机;韦根传感器;IC卡;智能水表;低功耗
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 paper designs an intelligent IC card water meter control system based on the single-chip computer. The core of the system is a single-chip microcomputer AT89C2051, the wiegand sensor is used to measure water consumption, the managements of water purchasing and consumption are realized by IC card’s writing, reading and encryption technology.
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