既然你都知道要做什么了.就是測(cè)水質(zhì), 就用導(dǎo)電性能而言, 純水的是不導(dǎo)電的，帶離子之后水才會(huì)導(dǎo)電，說白了就是整個(gè)系統(tǒng)的分為3個(gè)模塊，一個(gè)是測(cè)量模塊，一個(gè)是數(shù)據(jù)比較模塊，另一個(gè)是顯示模塊，測(cè)量模塊測(cè)水的導(dǎo)電性，酸堿鹽的電離程度不同，這個(gè)你可以上網(wǎng)差資料，之后對(duì)應(yīng)的有不同的線路在不同的線路用歐姆定理算出你這個(gè)不同程度的導(dǎo)電電壓，將這個(gè)電壓用模數(shù)轉(zhuǎn)換器轉(zhuǎn)成數(shù)字信號(hào)傳給單片機(jī)，這個(gè)單片機(jī)編程就需要你自己編了，程序?qū)崿F(xiàn)功能是對(duì)來的數(shù)字信號(hào)進(jìn)行你規(guī)定的數(shù)值比較，最后比較完之后就是顯示模塊了，這個(gè)簡(jiǎn)單的不能再簡(jiǎn)單了,找?guī)讉€(gè)發(fā)光二極管接I/O口上 再給單片機(jī)個(gè)程序..完事兒

基于單片機(jī)溫濕度測(cè)量系統(tǒng)（摘要翻譯）

Along with the humiture examination system's widespread utilization, the different profession and the domain have the various requirement and the standard to the humiture examination. This design mainly uses in the ordinary indoor humiture survey. Uses the DS2438, HIH3605B integration chip to take the humiture sensor. In the article has analyzed the humiture survey principle of work and the process, proposed the humiture examination system design's overall plan, has carried on the plan proof to each submodule design and compares. The hardware design uses protel the 99se software, has completed the monolithic integrated circuit smallest system, the LCD display circuit, sensor's schematic diagram and the PCB chart. The software design uses Keil uVision2, has completed the program module each module design programming, has realized to the humiture signal processing process programming and the debugging. This measurement system humidity measuring range 0%~100%, resolution ±2%; Temperature survey scope - 40~+125℃, resolution ±0.5℃. Can meet the daily life humiture survey requirements.

key words: AT89S52; HIH3605B; DS2438; LCD; Data acquisition; Data processing