以Arduino實現可見光通訊之應用研究

Application Research of Visible Light Communication using Arduino

林宏懌(Hung-Yi Lin)

指導教授 ： 林其誼

淡江大學/工學院/資訊工程學系智慧計算與應用碩士班/碩士(2022年)

https://doi.org/10.6846/TKU.2022.00711

摘要

論文提要內容:
隨著網路的發展，個人裝置的產品也越發蓬勃，如人手一台的手機到基本大學生必備的筆記型電腦，再到筆記時代來臨的個人平板與運動、商業人士皆喜愛的智慧型手錶等等，光一個人擁有的裝置數量就以驚人的倍數在成長，網路傳輸的通道也漸漸成為大家關注的焦點，如隨著網路的需求量倍增的情況下，無線通訊的碰撞會不會越來越嚴重？訊號傳送出去的過程是否安全？空氣中的無線訊號是否會影響健康？種種的問題都使我們對於現今網路的傳輸方式打著大大的疑問，下一代的網路環境是否有更新的技術能實現，以解決目前網路需求大增的問題。若能發展出保留無線傳輸的優點，並且提升傳輸的安全性網路與免除對於無線電波影響健康問題的狀況，將給予使用者一個極大的安心感，並且能延伸發展出更多與個人相關的密切裝置以供使用。
Wi-Fi使用的無線電波頻段範圍為常見的2.4GHz與5GHz，可見光頻段範圍介於400 THz (760 nm)至790 THz (380 nm)，總體大約有320THz，相較於無線電波的總體，大約有10000倍的空間可供傳輸，且因為可見光的特性本身並不會發生碰撞，讓原先有碰撞缺點的無線電波得以改善。
本次研究將使用常見的Arduino開發板，透過LED (Light-Emitting Diode)光源發送可見光頻段的方式作為傳輸網路的介質，相較與以往無線網路Wi-Fi所使用的無線電波(Radio Wave)不同，Li-Fi使用的頻段為可見光(Visible Light)，將拓展不同頻段的網路作為傳輸介質，實現物聯網中雙向資料的傳輸。

關鍵字

物聯網 ； 可見光傳輸 ； Li-Fi ； Arduino

並列摘要

Abstract:

With the development of internet and communication technologies, personal electronic devices have become one of the booming products in recent years, ranging from smartphones to laptops, as well as tablets and smart watches. The number of devices a person owns is growing at an astonishing rate. The network transmission channel has gradually become the focus of everyone's attention. For example, as the demand for the networking needs, will the collision of wireless communication become more and more serious? Is the transmission safe during its progress? Does wireless signals harmful to health? All kinds of problems make people doubtful about the dependability and safety of the current wireless networks, and whether the next-generation network technologies can solve these problems is still unknown. If the advantages of wireless transmission can be kept while the security and the health problems caused by radio waves can be improved, people will have a peace of mind and be willing to take advantage of the benefits brought by more personal electronic devices.

The frequency bands of radio waves used by Wi-Fi are 2.4GHz and 5GHz, while the visible light frequency range is between 380nm and 780nm, which is about 320THz totally, and is 10000 times greater than the bandwidth of Wi-Fi. With Li-Fi, the transmitter/receiver pairs no longer need to select channels like Wi-Fi does, and because the visible lights do not collide with each other, the collision problem of Wi-Fi can be avoided.

In this thesis we will use the widely available development board – Arduino, to transmit visible light signals through the LED (Light-Emitting Diode) light source. The frequency band used by Li-Fi is visible light. With two different frequency bands used by two light sources, we are able to realize two-way data transmissions in the Internet of Things (IoT) application environment.

並列關鍵字

Internet of Things ； Visible Light Communication ； Li-Fi ； Arduino

參考文獻

參考文獻

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[2] S. Dongus, H. Jalilian, D. Schürmann, and M. Röösli, "Health effects of WiFi radiation: a review based on systematic quality evaluation," Critical Reviews in Environmental Science and Technology, pp. 1-20, 2021.

[3] TED Global (2011), Wireless data from every light bulb, https://www.ted.com/talks/harald_haas_wireless_data_from_every_light_bulb (last accessed: June 2022)

[4] TED Global, London (2015),Forget Wi-Fi. Meet the new Li-Fi Internet, https://www.ted.com/talks/harald_haas_forget_wi_fi_meet_the_new_li_fi_internet (last accessed: June 2022)