目前大多數(shù)的電子產(chǎn)品采用的控制方式都是開關(guān)式按鍵或觸摸的方式，如數(shù)碼相機、手機等，工業(yè)用的設(shè)備也是如此。本文所述的控制方式采用了無線的遙控方式，這種遙控方式在電視機領(lǐng)域已應(yīng)用多年，技術(shù)已經(jīng)很成熟，原理簡單，易于實現(xiàn)。由于選用的遙控器適用于36～40 kHz載波頻率的紅外接收器，所以設(shè)計中選用了36 kHz紅外接收器，ATmega 8L接收紅外接收器的信號，從中解析出遙控器上各個按鍵的碼值，并會轉(zhuǎn)去執(zhí)行遙控器上相應(yīng)按鍵上的功能。遙控器上設(shè)計了21個按鍵，代表了此系統(tǒng)擁有的所有功能，分別為：
圖像存儲功能 按下存儲鍵就可以將當前看到的畫面存儲到存儲設(shè)備中；
圖像預覽即讀圖功能 將存儲在存儲設(shè)備中的圖片重新讀出，在顯示器上顯示，預覽圖片時可以在當前圖片的基礎(chǔ)上，上翻或下翻即可循環(huán)瀏覽已存儲的所有圖片；
紅、綠、藍增益及曝光值的調(diào)節(jié)功能 可以對這4個參數(shù)進行增大和減小的控制；
雙十字線的控制和調(diào)節(jié)功能 當想要十字線功能時只要按一下十字線按鍵就會在當前實時顯示的畫面上看到兩條十字交叉的線，十字線的位置可以根據(jù)用戶的需要任意移動，當需要雙十字線時需要兩個控制十字線的按鍵都按下，使用雙十字線可以圈定整幅畫面上重點觀察的范圍；
圖像凍結(jié)功能 當凍結(jié)鍵按下時顯示器上的整個畫面凍結(jié)，此時不能進行存圖、讀圖或其他任何操作；
當前參數(shù)值保存功能 此鍵按下后會對當前的增益、曝光、十字線位置等參數(shù)的當前值存儲到ATmega8L的E2PROM中，這樣在下次啟動系統(tǒng)時，系統(tǒng)會將E2PROM保存的各參數(shù)值一一讀出；
復位初始參數(shù)值功能 如果用戶不小心將某一參數(shù)值調(diào)亂了，可以按下此鍵來恢復系統(tǒng)最原始的參數(shù)值。
4 結(jié)語
本文所述的圖像采集系統(tǒng)中存儲方案的選擇和設(shè)計對于數(shù)據(jù)量稍大又不是很復雜的系統(tǒng)的設(shè)計具有借鑒作用，而且將遙控器技術(shù)作為系統(tǒng)控制操作的方式，讓人耳目一新，此圖像采集系統(tǒng)應(yīng)用于工業(yè)領(lǐng)域，操作方便且實惠新穎。
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