【正文】 The design of digital showed watermeter based on 51 Microcontroller Abstract: This design is a saving meter which based on a digital display 51 microcontroller. The water meter is collected using Hall sensor signal flow through the improvement of the existing water meter, bined with electronic sensing technology,Design a small size, light weight, all figures show the watermeter. The figures show that the impeller to install water meters on the small cylinder. The water meter is equipped with a Hall element AH44E shell. Hall element received signal is passed to SCM. The signal is processed, sent to the display board. Display board can be displayed with the instantaneous flow, respectively, the cumulative flow window, alarm lights and alarm, the display board covered with a transparent sealing plate. This design has the following advantages: 1, accurately reflect the instantaneous flow and total flow rate, reading accuracy, and efficiency is good。該數(shù)顯水表的葉輪處安裝上小磁柱 ,水表外殼上裝有霍爾元件 AH44E，霍爾元件接收到的信號被傳入單片機(jī)，信號通過處理，傳送到顯示板上，顯示板上分別帶有可顯示瞬時流量、累計流量的視窗、報警燈和報警器，顯示板上蓋有透明密封板。 基于 51單片機(jī)的數(shù)顯節(jié)水型 水表 的設(shè)計 摘要： 本設(shè)計是基于 51 單片機(jī)的一種數(shù)顯節(jié)水型水表。該水表是采用霍爾傳感器采集水流信號 ,通過對現(xiàn)有水表的改進(jìn) ,并結(jié)合電子傳感技術(shù)，設(shè)計出一種體積小 ,重量輕 ,全數(shù)顯的節(jié)水型水表。本設(shè)計有如下的優(yōu)點(diǎn)：一、準(zhǔn)確反應(yīng)瞬時流量和累計流量 ,讀數(shù)準(zhǔn)確 ,使用效果好；二、 能夠在超過用戶設(shè)定值時提醒用戶，起到了時時提醒用戶節(jié)水的目的。 2, the user can set the value in more than remind the user, playing the purpose of saving time to time to remind the user. Keyword: Figures show, Hall sensors, small cylinders, display board, alarm 目 錄 1設(shè)計來源及設(shè)計意義 ................................................................................................ 3 2設(shè)計方案 ..................................................................................................................... 3 總體設(shè)計 .......................................................................................................... 3 智能水表的硬件組成部分 .................................................................. 3 智能水表應(yīng)具有以下功能： .............................................................. 3 智能水表實(shí)現(xiàn)方式 .............................................................................. 3 理論基礎(chǔ) ........................................................................................................ 4 AT89S51 單片機(jī) ................................................................................ 4 AH44E 霍爾傳感器 .............................................................................. 5 1602LCD 液晶顯示屏 .......................................................................... 6 水流計 .................................................................................................. 7 3 硬件設(shè)計 .................................................................................................................... 7 設(shè)計方案 ........................................................................................................ 7 電路圖的設(shè)計 ................................................................................................. 8 信號采集電路 ...................................................................................... 8 數(shù)據(jù)顯示電路 ...................................................................................... 9 復(fù)位電路 .............................................................................................. 9 報警燈電路 ....................................................................................... 10 4 軟件設(shè)計 .................................................................................................................. 10 主流程框圖 ................................................................................................... 10 按鍵掃描子程序框圖 ................................................................................... 12 流水量計數(shù)程序框圖 ................................................................................ 13 報 警子程序框圖 ........................................................................................... 14 5 系統(tǒng)調(diào)試 .................................................................................................................. 15 6總結(jié) ........................................................................................................................... 15 致謝 .............................................................................................................................. 15 附錄： .......................................................................................................................... 16 附錄一： 1602LCD 簡介 .........