【摘要】：隨著信息技術(shù)的發(fā)展，人們需要更便捷的方式與智能設(shè)備進行交互，觸摸屏技術(shù)作為人機交互設(shè)備的一種得到了蓬勃的發(fā)展。 紅外觸摸屏不需要在顯示屏上附加薄膜，因而透過率100%，并且擁有不易受電磁場，靜電干擾的優(yōu)點，，所以適用于環(huán)境惡劣的工作場合。但是紅外觸摸屏依賴紅外光作為工作媒介，而紅外波段在太陽光的能量分布中約占50％，太陽光將干擾紅外觸摸屏的正常工作。 針對上述缺點，本文對紅外觸摸屏的工作原理和設(shè)計實現(xiàn)進行深入研究，首先研究適用于室內(nèi)光環(huán)境的紅外觸摸屏，在此基礎(chǔ)上，研究能夠在高空強環(huán)境光下工作的紅外觸摸屏，提出并行觸摸掃描，選頻接收的可擴展，抗強光紅外觸控模塊，根據(jù)選頻接收方式不同，又分別研究無源晶體諧振器選頻接收和數(shù)字互相關(guān)鎖相放大選頻接收兩個方案。 首先研究適用于室內(nèi)光環(huán)境的紅外觸摸屏的工作原理和設(shè)計實現(xiàn)，測試分析其在環(huán)境光變化時的工作性能。方案的特點是：由ARM7控制一一對應(yīng)的165對紅外發(fā)射二極管和光電三極管順序的點亮和數(shù)據(jù)接收，在ARM7的接收數(shù)據(jù)處理中使用動態(tài)閾值的方式使紅外觸摸屏能在室內(nèi)370lux光強環(huán)境下正常工作。 然后研究無源晶體諧振器選頻接收的并行掃描紅外觸摸屏的工作原理和設(shè)計實現(xiàn)，測試分析其抗強光性能。方案的特點是：使用C8051F930將接收數(shù)據(jù)的量化和數(shù)據(jù)處理集成到一個芯片上，將整個紅外觸摸屏分割為一系列獨立工作的掃描單元，整個紅外觸摸屏的順序掃描改變?yōu)楦鱾�掃描單元的并行掃描；掃描單元使用擴展UART通信協(xié)議與主控模塊通信；使用光電二極管作為光電轉(zhuǎn)換器件避免接收信號的飽和；利用無源晶體諧振器的逆壓電——壓電效應(yīng)構(gòu)成窄帶濾波實現(xiàn)選頻接收。實驗證明該方案能夠在環(huán)境光強45Klux下正常工作。 最后，基于適用于室內(nèi)光環(huán)境的紅外觸摸屏研究中提出的觸摸坐標(biāo)產(chǎn)生方法，無源晶體諧振器選頻接收并行掃描紅外觸摸屏研究中提出的擴展UART協(xié)議實現(xiàn)并行掃描和模塊擴展的方法，研究使用互相關(guān)鎖相放大選頻接收的可擴展、抗強光紅外觸控模塊的工作原理和設(shè)計實現(xiàn)，測試分析其抗強光性能。方案的特點是：使用PSOC5可編程片上系統(tǒng)芯片實現(xiàn)數(shù)字互相關(guān)鎖相放大，提高集成度并且實現(xiàn)靈活配置對不同頻率信號的選頻接收；改進光電二極管的光電轉(zhuǎn)換電路，使用多電壓域的方式提高飽和電壓限值。實驗證明該方案能在環(huán)境光強100Klux下正常工作。
[Abstract]:With the development of information technology, people need more convenient way to interact with intelligent devices. As a kind of human-computer interaction device, touch screen technology has been developed vigorously. The infrared touch screen does not need to add film to the display screen, so it has 100% transmittance, and has the advantages of not being disturbed by electromagnetic field and static electricity, so it is suitable for work in harsh environment. But the infrared touch screen relies on infrared light as the working medium, and the infrared wave band accounts for about 50% of the energy distribution of the sun light, which will interfere with the normal operation of the infrared touch screen. In view of the shortcomings mentioned above, the working principle and design realization of infrared touch screen are deeply studied in this paper. Firstly, the infrared touch screen suitable for indoor light environment is studied, and on this basis, The infrared touch screen which can work in high altitude strong ambient light is studied, and the parallel touch scanning, expandable frequency selection receiving module and anti-strong light infrared touch control module are put forward, according to the different receiving mode of frequency selection, The frequency-selective reception schemes of passive crystal resonator and digital cross-correlation phase-locked amplifier are studied respectively. Firstly, the working principle and design implementation of infrared touch screen suitable for indoor light environment are studied, and the performance of infrared touch screen is tested and analyzed when the ambient light changes. The scheme is characterized by ARM7-controlled one-to-one lighting and data reception of 165pairs of infrared emitting diodes and photodiodes in sequence, In the receiving data processing of ARM7, the infrared touch screen can work normally in the indoor 370lux light intensity environment by using the dynamic threshold method. Then the principle and design of parallel scanning infrared touch screen for frequency selection and reception of passive crystal resonator are studied, and its anti-strong light performance is tested and analyzed. The characteristic of the scheme is that the quantization and processing of received data are integrated into a single chip using C8051F930, and the whole infrared touch screen is divided into a series of independent scanning units. The sequential scanning of the whole infrared touch screen is changed to the parallel scanning of each scanning unit. The scanning unit uses the extended UART communication protocol to communicate with the main control module, and uses the photodiode as the photoelectric conversion device to avoid the saturation of the received signal. Using the inverse piezoelectric-piezoelectric effect of passive crystal resonator, narrow band filter is used to realize frequency selective reception. The experimental results show that the scheme can work normally under ambient light intensity 45Klux. Finally, based on the touch coordinate generation method proposed in the research of infrared touch screen suitable for indoor light environment, In the research of passive crystal resonator frequency selective reception parallel scanning infrared touch screen, an extended UART protocol is proposed to realize parallel scanning and module extension, and the extensibility of general election frequency receiving using cross-correlation phase-locked amplifier is studied. The working principle and design implementation of the anti-strong light infrared touch module are introduced, and its anti-strong light performance is tested and analyzed. The characteristics of the scheme are as follows: the system chip on PSOC5 programmable chip is used to realize digital cross-correlation phase-locked amplification, to improve the integration degree and to realize the flexible configuration of frequency selection and reception of different frequency signals; The photoelectric conversion circuit of photodiode is improved, and the saturation voltage limit is increased by using multi-voltage domain. The experimental results show that the scheme can work normally under ambient light intensity 100Klux.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TP334.3;TN219

【參考文獻】

相關(guān)期刊論文 前5條

1 周燁;;紅外觸摸屏抗強光干擾的研究[J];電子設(shè)計工程;2011年04期

2 湯世洪;劉成安;陳泉根;;基于FPGA的高分辨率紅外觸摸屏的設(shè)計[J];電子設(shè)計工程;2011年22期

3 沈文星,張東來,龔麗雯,劉兵;一種紅外屏電路的驅(qū)動電流自適應(yīng)調(diào)節(jié)方案[J];紅外;2005年06期

4 Geoff Walker;黃華;石琳;;形形色色的觸摸技術(shù)[J];現(xiàn)代顯示;2007年04期

5 盧如西;;大型智能交互觸摸屏的設(shè)計與實現(xiàn)[J];現(xiàn)代顯示;2007年12期

相關(guān)碩士學(xué)位論文 前10條

1 周燁;基于鎖相放大技術(shù)的抗強光干擾紅外觸控技術(shù)的研究[D];電子科技大學(xué);2011年

2 鄧延安;基于FPGA的數(shù)字化調(diào)頻DDS系統(tǒng)設(shè)計[D];合肥工業(yè)大學(xué);2005年

3 蔣冠華;基于虛擬儀器技術(shù)的互感器校驗系統(tǒng)設(shè)計[D];大連理工大學(xué);2008年

4 張明;抗強光干擾的高精度紅外觸摸屏設(shè)計與實現(xiàn)[D];電子科技大學(xué);2008年

5 孔德元;針對正弦余弦計算的CORDIC算法優(yōu)化及其FPGA實現(xiàn)[D];中南大學(xué);2008年

6 胡力堅;基于DDS的任意波形發(fā)生器設(shè)計與實現(xiàn)[D];西安電子科技大學(xué);2009年

7 董冠濤;紅外線感應(yīng)電子白板的設(shè)計與實現(xiàn)[D];吉林大學(xué);2009年

8 張宏偉;多觸點抗強光干擾紅外觸摸屏的設(shè)計與驗證[D];電子科技大學(xué);2009年

9 徐先超;復(fù)雜電磁環(huán)境中標(biāo)準(zhǔn)信號生成系統(tǒng)的研究與實現(xiàn)[D];國防科學(xué)技術(shù)大學(xué);2008年

10 趙錦江;基于CORDIC算法的數(shù)字調(diào)制器設(shè)計與實現(xiàn)[D];國防科學(xué)技術(shù)大學(xué);2009年

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