發(fā)布時(shí)間：2019-05-20 20:10

【摘要】：系統(tǒng)能夠?qū)崿F(xiàn)手寫繪圖板功能,當(dāng)觸筆接觸覆銅板時(shí),能夠通過(guò)顯示屏LCD12864顯示出觸筆所在的坐標(biāo)位置、象限以及觸筆軌跡等信息。電路設(shè)計(jì)以單片機(jī)STC89C58為核心,基于惠斯通電橋原理,從覆銅板4個(gè)引腳分別引出4路信號(hào),經(jīng)儀表放大器INA128進(jìn)行10 000倍差分放大進(jìn)行PCB坐標(biāo)定位,然后由TLC2543進(jìn)行A/D轉(zhuǎn)換,在單片機(jī)中建立數(shù)據(jù)庫(kù),用查表法在LCD12864液晶屏上進(jìn)行顯示。實(shí)驗(yàn)表明,所設(shè)計(jì)的手寫繪圖板系統(tǒng)能基本完成題目設(shè)計(jì)要求,并且有進(jìn)一步開發(fā)與完善的空間。
[Abstract]:The system can realize the function of handwritten drawing board. When the touch pen touches the copper laminate, it can display the coordinate position, quadrant and touch pen track of the touch pen through the display screen LCD12864. The circuit design is based on the single chip microcomputer STC89C58. Based on the principle of Wheatstone bridge, four signals are derived from the four pins of the copper laminate, and the PCB coordinates are located by 10 000 times difference amplification through the instrument amplifier INA128, and then the A 鈮，

本文編號(hào)：2481925