基于AVR單片機的LED自適應(yīng)調(diào)光

論文編號:ZD1173   論文字數(shù):20389,頁數(shù):55

基于AVR單片機的LED自適應(yīng)調(diào)光傳感系統(tǒng)
摘要

 隨著LED照明技術(shù)的發(fā)展，對LED自適應(yīng)調(diào)光技術(shù)的需求更加強烈。本文以AVR單片機中的ATmeage16作為控制器，利用基于I2C（Inter Integrated Circuit）總線的光傳感芯片TSL2561采集室內(nèi)環(huán)境光照度，采用脈寬調(diào)制(Pulse Width Modulation-PWM)方式調(diào)節(jié)LED恒流驅(qū)動IC（BP2808、LM3404HV、LM3402HV等可根據(jù)功率需要選擇），進而調(diào)節(jié)LED的發(fā)光亮度，最終維持室內(nèi)環(huán)境光照度在一個設(shè)定的水平。同時利用紅外人體感應(yīng)模塊采集室內(nèi)人體信號，實現(xiàn)LED燈開啟和關(guān)斷的智能控制。再利用單總線技術(shù)的DS18B20溫度傳感器采集室內(nèi)溫度和使用LCD1602液晶屏實現(xiàn)室內(nèi)照度和溫度的實時顯示，再加按鍵實現(xiàn)LED亮度的手動控制，最后使用串口通信實現(xiàn)與上位PC的實時通信與控制。本文完成了整套系統(tǒng)的硬件設(shè)計和軟件編程，重點介紹了ATmeage16通過I2C總線讀取光傳感器芯片TSL2561數(shù)據(jù)、傳感器數(shù)據(jù)轉(zhuǎn)換為實際的室內(nèi)環(huán)境照度、PWM信號生成和輸出、DS18B20的通訊。
關(guān)鍵詞：ATmeage16  TSl2561  PWM  LED調(diào)光

AVR microcontroller based adaptive dimming LED sensor system
ABSTRACT

With the development of LED lighting technology，adaptive LED dimming technology for the needs of even more intense. In this paper, the ATmeage16 AVR microcontroller as a controller，based I2C (Inter Integrated Circuit) bus, light sensing chip TSL2561 acquisition indoor illumination。Using pulse width modulation (Pulse Width Modulation-PWM) LED constant current drive mode regulator IC (BP2808, LM3404HV, LM3402HV so can the power to choose), then adjust the LED's brightness, final light intensity of the indoor environment to maintain a specified level. The human body using infrared sensor module also collected indoor body signal, LED lights turn on and off the intelligent control. Reuse of single-bus technology DS18B20 temperature sensor acquisition and use of the indoor temperature LCD1602 LCD indoor illumination and temperature to achieve real-time display, together to achieve LED brightness button manual control, Together to achieve LED brightness button manual control, and finally use the Serial Communication with the host PC for real-time communication and control. This complete package of hardware and software design, focusing on the ATmeage16 through the I2C bus to read optical sensor chip TSL2561 data, sensor data is converted to the actual illumination of the indoor environment, PWM signal generation and output, DS18B20 communications.
Key Words：ATmeage16  TSl2561  PWM  LED dimming

目  錄

摘要 I
ABSTRACT II
    前  言 1
    1主要功能及流程說明 2
1.1主要功能 2
1.2系統(tǒng)流程圖 2
    2  LED自適應(yīng)調(diào)光溫度傳感系統(tǒng)的硬件設(shè)計 3
2.1  AVR單片機的硬件連接及介紹 3
2.2  TSL2561光強傳感器的硬件連接及介紹 4
2.3  DS18B20溫度傳感器的硬件連接及介紹 5
2.4  PWM波形的發(fā)生及恒流IC的輸出 6
2.4.1  PWM波形發(fā)生 6
2.4.2  恒流IC—BP2808 8
2.5  LCD1602液晶顯示的鏈接及介紹 11
2.6  紅外人體感應(yīng)模塊介紹 14
2.7  串口通訊及外部控制中斷 16
    3 LED自適應(yīng)調(diào)光溫度傳感系統(tǒng)的軟件設(shè)計 18
3.1  AVR單片機內(nèi)部中斷、 I/O設(shè)置及PWM發(fā)生 18
3.2  TSL2561的I2C通訊及照度的計算 24
3.3  DS18B20的單總線連接及溫度轉(zhuǎn)換 30
3.4  LCD1602的通訊及顯示 34
3.5  串口通訊的軟件設(shè)計 38
3.6系統(tǒng)條件判斷及模糊控制軟件編寫 43
    4系統(tǒng)總體設(shè)計介紹 44
4.1  系統(tǒng)性能特點說明 44
4.2  系統(tǒng)總體電路圖 44
    5 設(shè)計總結(jié)及心得體會 45
    參考文獻 46
附  錄 47
致  謝 51