中圖分類號： TN41 文獻(xiàn)標(biāo)識碼： A DOI：10.16157/j.issn.0258-7998.211903 中文引用格式： 艾凱旋，劉云婷，劉洋. 一種觸摸屏數(shù)據(jù)采集系統(tǒng)的設(shè)計[J].電子技術(shù)應(yīng)用，2022，48(4)：122-126. 英文引用格式： Ai Kaixuan，Liu Yunting，Liu Yang. Design of a data acquisition system for touch screen[J]. Application of Electronic Technique，2022，48(4)：122-126.
Design of a data acquisition system for touch screen
Ai Kaixuan1，2，Liu Yunting1，Liu Yang2
1.Metrology and Testing Center,China Academy of Engineering Physics，Mianyang 621999，China； 2.School of Electronic Science and Engineering，University of Electronic Science and Technology of China，Chengdu 610054，China
Abstract： As one of the mainstream ways of human-computer interaction, touch screens have very important research value. One of the important directions is the development of self-capacitive touch screens. However, the current self-capacitive touch screen data acquisition circuit has only 13 capacitive channels at most, which severely limits the expansion of the number of touch points in the development of self-capacitive touch screens. In view of the problem of the small number of capacitive channels in the touch screen data acquisition circuit , a touch screen data acquisition system controlled by Arduino is designed, including hardware and software. The hardware part is a touch detection circuit, which can detect up to 24 capacitance channels, and the software part is a graphical interface. It can detect the working status of the touch point of the self-capacitive touch screen in real time，and dynamically display the working status of touch points in the form of graphical interface.
Key words : touch detection circuit；touch screen；data acquisition system；graphical interface
