Underwater environment sensors with visible light communication systems
Keywords:internet of things, light communication, realtime monitoring, underwater environment, visible light communication
This work presents a design and experiment of a new expectation for fresh underwater exploration, where the visible light communication (VLC) is employed as communication systems. The overall system is designed for a simple circuit and low-cost. The transmitter, which is located in the underwater, is responsible for transmitting the temperature and pH sensors information data. The LEDs (Light emitting diode) array with 10W power is used, where only one transistor driver circuit is proposed. The baud rate is 9,600 b/s (baud per second). At the receiver, 4 APDs (Avalanche Photodiodes) are utilized to receive and that converts the light signal to electrical signal. Since the input voltage of ESP8266 requires 5V, the summed 4-APD outputs by using equal gain combining (EGC) is needed. As a result, the amplitude between 3.3 V and 5 V is achieved. In this work, ua741 is used for the amplification IC, while ESP8266 is adopted for data processing and that sends the sensor data value to the internet. Netpie is used to store the data. To verify the system performance, the result was recorded for one hour with the communication distance of 125 cm (1.25 meters). It is shown that the system works very well and improves a lot, when compared with only 1- or 2-APDs receiver. Especially, this work can be used in the industry for replacing the traditional underwater exploration and provide greater safety in exploration in the future.
Ali, M. A. A., & Khalid Rahi, S. (2018). Line of sight (LoS) underwater wireless optical communication based on LED. 9th International Symposium on Telecommunications (IST). pp. 270-274. DOI: 10.1109/ISTEL.2018.8660998
Celik, A., Saeed, N., Shihada, B., Al-Naffouri, T. Y., & Alouini, M. (2020). End-to-end performance analysis of underwater optical wireless relaying and routing techniques under location uncertainty. IEEE Transactions on Wireless Communications, 19(2), 1167-1181. DOI: 10.1109/TWC.2019.2951416
Chen, M., Zou, P., Zhang, L., & Chi, N. (2020). Demonstration of a 2.34 Gbit/s real-time single silicon-substrate blue LED-based underwater VLC system. IEEE Photonics Journal, 12(1), 1-11. DOI: 10.1109/jphot.2019.2958969
DFRobot. (2017). Waterproof DS18B20 Sensor Kit. Retrieved from: https://media.digikey.com/pdf/Data%20Sheets/DFRobot%20PDFs/KIT0021_Web.pdf
e-Gizmo Mechatronix Central. (2017). PH Sensor E-2-1-C. Retrieved from: https://www.e-gizmo.net/oc/kits%20documents/PH%20Sensor%20E-201-C/PH%20Sensor%20E-201-C.pdf?fbclid=IwAR2QK9gcAg-rt2AVwbM8Acw7phpkNybou0aJa83VqTE0IXh9YxfSfrvUwPE
Hamamatsu. (2006). Cat. No. KPIN1050E01 Aug. 2006 DN. Retrieved from: https://docs.rs-online.com/ec2b/0900766b80d838f0.pdf
Ji, Y., Wu, G., & Wang, S. (2018). Modulation analysis for long distance underwater VLC systems under dead time limit. IEEE 18th International Conference on Communication Technology (ICCT). Corpus ID: 57378367, pp. 392-395. DOI: 10.1109/ICCT.2018.8600250 Corpus ID: 57378367
Kaushal, H., & Kaddoum, G. (2016). Underwater optical wireless communication. IEEE Access, 4, 1518-1547. DOI: 10.1109/ACCESS.2016.2552538
Kordach, A., Chardwattananon, C., Wongin, K., Chayaput, B., & Wongpat, N. (2018). Evaluation on the quality of Bangkok tap water with other drinking purpose water. In E3S Web of Conferences, 30, 01011 (2018). Water, Wastewater and Energy in Smart Cities. pp. 1-9. DOI: 10.1051/e3sconf/20183001011
Lee, K., & Park, H. (2011). Modulations for visible light communications with dimming control. IEEE Photonics Technology Letters, 23(16), 1136-1138. DOI: 10.1109/LPT.2011.2157676
Mahatanakul, J. (2003). Electronics. Bangkok, Thailand: Top Publishing (http://www.toptextbook.com/).
Nakamura, K., Mizukoshi, I., & Hanawa, M. (2015). Optical wireless transmission of 405 nm, 1.45 Gbit/s optical IM/DD-OFDM signals through a 4.8 m underwater channel. Optics Express, 23(2), 1558-1566. DOI: 10.1364/OE.23.001558
Pathak, P. H. Feng, X. Hu, P. Mohapatra, P. (2015). Visible light communication, networking, and sensing: A survey, potential and challenges. IEEE Communications Surveys & Tutorials, 17(4), 2047-2077.
Puntsri, K., & Suttisopapan, P. (2019). High spectrum efficiency of MIMO-SC-FDMA for optical wireless communication systems. RMUTI JOURNAL Science and Technology, 12(3), 1-12.
Puntsri, K., Yindeemak, A., & Bubpawan, T. (2020). pH and temperature underwater monitoring with application using visible light communications. Proc. SPIE 11331, Fourth International Conference on Photonics Solutions (ICPS2019), 113310B (11 March 2020). DOI: https://doi.org/10.1117/12.2552971
Saini, P., Singh, R. P., & Sinha, A. (2017). Path loss analysis of RF waves for underwater wireless sensor networks. International Conference on Computing and Communication Technologies for Smart Nation (IC3TSN). Corpus ID: 46857725, pp. 104-108. DOI: 10.1109/IC3TSN.2017.8284460
Wen, D., Cai, W., & Pan, Y. (2016). Design of underwater optical communication system. OCEANS 2016 – Shanghai. Corpus ID: 5771161. pp. 1-4. DOI: 10.1109/OCEANSAP.2016.7485659
Yilmaz, A., Elamassie, M., & Uysal, M. (2019). Diversity Gain Analysis of Underwater Vertical MIMO VLC Links in the Presence of Turbulence. IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom). pp. 1-6. DOI: 10.1109/BlackSeaCom.2019.8812823
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