本文選題：電容式 + 觸摸按鍵��； 參考：《武漢輕工大學(xué)》2013年碩士論文

【摘要】：隨著電子科學(xué)技術(shù)的不斷發(fā)展，電容式觸摸按鍵已經(jīng)越來越多的應(yīng)用于各種電子產(chǎn)品設(shè)計(jì)中。傳統(tǒng)機(jī)械按鍵輸入方式的電路復(fù)雜，并且容易磨損、使用壽命低，，已經(jīng)逐漸被設(shè)計(jì)者所拋棄。而電容式觸摸按鍵技術(shù)電路簡單、操作方便，并且靈敏準(zhǔn)確，很好的彌補(bǔ)了機(jī)械按鍵的缺點(diǎn)和不足。但是，目前的電容式觸摸按鍵技術(shù)仍處于改進(jìn)和完善的階段，漂移現(xiàn)象一直是電容式觸摸技術(shù)的最大缺點(diǎn)。而與之相關(guān)的電容式觸摸按鍵的靈敏度、防噪聲干擾、防水干擾等難題都在不同程度上阻礙了該技術(shù)進(jìn)一步的發(fā)展。因此，這些問題都是該技術(shù)急需解決和改進(jìn)的地方。 本文重點(diǎn)介紹一種具有較好抗噪聲及防水干擾能力的電容式觸摸按鍵的觸摸算法，并通過對觸摸按鍵數(shù)據(jù)精度、檢測速度、參考電壓以及電容充放電頻率等參數(shù)的研究以實(shí)現(xiàn)觸摸按鍵的使用靈敏、反映快速、判斷精確。同時(shí)，在基于電容式觸摸按鍵系統(tǒng)的研究上，設(shè)計(jì)了一款可以作為彩燈玩具或彩燈裝飾的七彩觸摸燈，通過實(shí)例設(shè)計(jì)來調(diào)試并驗(yàn)證觸摸按鍵系統(tǒng)的實(shí)際使用效果。 觸摸彩燈選用BF6911AS10電容式觸摸控制芯片作為主控，系統(tǒng)采用鋰電池供電，通過多個(gè)觸摸按鍵以及紅外遙控結(jié)合系統(tǒng)軟件的編寫完成開關(guān)機(jī)、顏色循環(huán)、顏色改變等功能。彩燈的顏色變換則是利用芯片的GPIO口模擬脈沖寬帶調(diào)制功能，從而通過主控控制紅綠藍(lán)三色LED燈頭各自的占空比而得以實(shí)現(xiàn)的。同時(shí)系統(tǒng)采用低功耗待機(jī)模式，并能通過充電器對供電鋰電池進(jìn)行充電。 研究和測試結(jié)果表明，所設(shè)計(jì)的電容式觸摸按鍵響應(yīng)速度快、檢測精度準(zhǔn)確、抗干擾能力強(qiáng)，并且有一定的防水抗噪能力。該研究有效的改善和彌補(bǔ)了當(dāng)前電容式觸摸按鍵技術(shù)的不足之處，并使該技術(shù)擁有了更大的應(yīng)用價(jià)值與市場前景。
[Abstract]:With the development of electronic science and technology, capacitive touch keys have been more and more used in the design of electronic products. The traditional mechanical keystroke input circuit is complex, easy to wear, low service life, and has been abandoned by designers. The capacitive touch keystroke circuit is simple, easy to operate, sensitive and accurate, which makes up for the shortcomings of mechanical keystroke. However, the current capacitive touch keystroke technology is still in the stage of improvement and perfection, drift phenomenon has always been the biggest disadvantage of capacitive touch technology. The sensitivity of capacitive touch keystrokes, anti-noise interference, waterproof interference and other problems have hindered the further development of the technology in varying degrees. Therefore, these problems are urgently needed to solve and improve the technology. This paper mainly introduces a touch algorithm of capacitive touch keystroke, which has the ability of resisting noise and waterproof interference, and detects the speed through the precision of the data of touch key. The parameters such as reference voltage and capacitance charge / discharge frequency are studied to realize the sensitive use of touch keys, fast response and accurate judgment. At the same time, on the basis of capacitive touch keystroke system, a colorful touch lamp which can be used as color lamp toy or color lamp decoration is designed, and the actual use effect of touch key system is tested and verified by an example design. The touch color lamp uses BF6911AS10 capacitive touch control chip as the main control, the system uses lithium battery power supply, through the multi-touch keys and infrared remote control system software programming to complete the switch machine, color cycle, color change and other functions. The color conversion of the color lamp is realized by using the GPIO port of the chip to simulate the pulse wide band modulation function, so that the duty cycle of the red, green and blue LED lamp heads can be controlled by the main control. At the same time, the system adopts low power standby mode and can charge the power supply lithium battery through charger. The research and test results show that the designed capacitive touch keystroke has high response speed, accurate detection accuracy, strong anti-interference ability, and has certain water-proof and anti-noise ability. This research effectively improves and makes up for the shortcomings of the current capacitive touch keystroke technology, and makes the technology have greater application value and market prospect.
【學(xué)位授予單位】：武漢輕工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TP334.3

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