1. Advanced Science and Technology Letters
Vol.106 (Information Technology and Computer Science 2015), pp.22-26
Development of Self-powered LED Street Light and Remote Controller Utilizing the ZigBee and Smart
Devices
Sungwook Yoon, Hyenki Kim*
Dept. of Multimedia Engineering, Andong National University,
388 Seongcheon-Dong, Andong-City, Gyeongsangbuk-Do, Republic of Korea
*Corresponding author: Hyenki Kim,
Abstract. Notwithstanding street lights commonly supplied with power by connecting to power line and generally controlled by wired type, they need different type of system under the environment requiring self-charging and remote control. In this research, a system was developed that enables self- recharging and remote control with the use of photovoltaic energy of LED street light that can be effectively used for street roads under specific environment, and transmission of the state of voltage and LED power consumption. This system can be used to effectively provide lighting information and control to remote users under specific environments or circumstances.
Keywords: Self-powered light lighting, IoT, Remote Control, LED
1 Introduction
As a platform of Internet of Things (IoT) has been brought up, recently integrated with ubiquitous environment, research is actively being conducted on network control of USN system under the actual road environment[1,2]. Notwithstanding street lights commonly supplied with power by connecting to power line and generally controlled by wired type, they need different type of system under the environment requiring self- charging and remote control[3,4]. Generally, for self-charging, a prerequisite is to fix upon a method depending on the degree of charge in regards to charging efficiency[5,6]. To judge this, the voltage charged requires a continuous check. Further, the use of LED light can lead to effective lighting by properly controlling excessive temperature rises and ambient illumination. For this, in this paper, a prototype was manufactured after designing self-generating LED street light and remote controller that can collect data at close range and transmit information by using zigbee, and grasp circumstances by controlling smart devices by using network.
ISSN: ASTL Copyright © 2015 SERSC

2. Table 1. Adjust the Brightness of the Backlighting
Advanced Science and Technology Letters
Vol.106 (Information Technology and Computer Science 2015)
2 Design of self-powered LED Street lights using Zigbee and smart devices and remote controller
Design of self-powered LED street lights using remote control and network and remote controller system is broadly divided into the following 3 development items.
- Design and Manufacture of self-generated charging circuit and LED street light drive-unit board
- Network composition and control board manufacture
- Development of relevant software using micro embedded computer
To accomplish these items, a prerequisite is to secure LED drive power technology using solar photovoltaic energy, and apply wireless data transmission technology and communication network composition technology in an integrated manner. Together with this, illumination control technology controlling the brightness of lighting should be applied depending on ambient illumination. Designed system block diagram is shown as in the picture.
It was composed with about 6 hours for daily lighting time of street lights, and about 3 days (i.e. 18 hours) for a period that can prepare for cloudy, rainy days. For the maximum brightness of it, a 5-Stageis applied to LED lighting consumption power based on brightness criteria. To implement stable heat management system, designed was functions such as temperature management control and heat foldback.
When LED temperature rises above safe temperature values, the lifetime and efficiency of LED lower. In case of using 'LM3424', lighting designers can program breakpoint of temperature and inclination in the range that LED can be safely operated. At any condition exceeding temperature, heat foldback circuit of 'LM3424' decreases the controllable current passing through LED. The decreased current maintains LED in relevant ranges until it darkens LED in a range programmed by designers and returns to operating temperatures. By applying booster system, the driving voltage of LED street light, 24V was supplied to battery voltage of 12V. A 5-Stage control procedure was allowed by using the PWM dimming of lighting brightness enabled depending on ambient illumination in system.
Table 1. Adjust the Brightness of the Backlighting
Lux
Intensity of Light by Stage on Street Light
1 - 30
Stage 5
Stage 4
Stage 3
Stage 2
Stage 1
211 or above
Street lights Off
The possibility of failure or defect can be judged by detecting supply current and voltage, and transmitting a value to remote sites through serial communication, and when values of illumination are judged dark, the supply current can be used to check whether or not LED light is on. For communication between devices, RF modem and
Copyright © 2015 SERSC 23

3. Advanced Science and Technology Letters
Vol.106 (Information Technology and Computer Science 2015)
Zigbee were used. Solar photovoltaic generation and charging circuit were composed with solar cells for generation.
3 Implementation
App and home server constructed with a single computer output real-time battery voltage, temperature, and a value of luminance sensor of system by using Arduino Ethernet Shield and Raspberry Pi. With App, LED light PWM can be controlled, and activated/deactivated system control can be selected.
A PV module is most efficient when it is installed at a 90 degree angle from sunlight, and a 12V/120Ah maintenance free lead-acid battery was used for the battery. Since 306Wh/Day is required for daily power generation for a 6-hour use, the capacity of battery is 84.15Ah for a 3-day use with 12V. For charging control, solar cell is used for a main generator, and wind generator is used for an auxiliary generator. The power generated by wind generator is converted into 12V after the power is rectified, and let into a next stage of solar cell Buck Convertor of the charge controller. To prevent charging loss from occurring owing to the maximized output voltage of solar cell not consistent with the charging voltage of battery, MPPT control was conducted by using Buck Chopper Converter.
Notwithstanding the circuit topology of Buck Converter consistent with the actual one, the values of devices between them are different. Concerning a tendency of circuit operation, Pspice simulation circuits of OR-cad and the results of them are summarized as the table.
Table 2. Pspice Circuit Simulation Results
Duty ratio
Output Voltage(V) 비고
0.1
6.372
Input Voltage V PWM fr=33KHz Period=30.03us
0.3
10.696
0.5
13.134
0.7
14.664
0.9
16.817
Further, Internet connection enabled small-sized server to be constructed by using relevant App connected with smart devices and single board computer. This system is designed to store the data received from time to time it transmits the illumination and the charge state.
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4. 4 Conclusion References
Advanced Science and Technology Letters
Vol.106 (Information Technology and Computer Science 2015)
Fig. 1. App and Web Server Control Screen for the Web and Smart Devices
4 Conclusion
In this paper, street light system was designed that can be used for the environment where self-charging and remote control are required, and to design this, different types of system were required. In this research, developed was a system that can self-charging and remote control using sunlight of LED street light, and can transmit the state of LED power consumption. It is anticipated that this system will be used to effectively provide lighting information and control to remote users under specific environments or circumstances. Self-generated LED lighting can frequently collect data on lighting environment through remote control, and street light lighting can be designed more economically compared to other facilities, which can lead to easy space composition.
This research leaves a room for further research to design system applicable to LED lighting devices that can exchange LED effectively controlling promotional sign and LED module for plant factory.
References
Sungwook Yoon, Hyenki Kim: Design and Implementation of Mobile Game System for Vitalization of Culture Tourism, IJMUE, vol.10, no.4, pp11-18(2015)
Jooyoung Ko, Hyenki Kim,: A Study on the Monitoring System for Emergency Recognition of Elderly People Living Alone, vol.12, no. 3, pp61-68(2014)
Kang-Yun Lee, Jung-Hun Lee, Changwoo Jung, Yeong-Ju Tak: IoT 3.0 and Internet of Things technology platform, Korea Information Processing Society Review, vol.21, no.2, pp.3-13 (2014)
Sung-Chan Choi, Min-woo Choi, Nam Jin, Jae-Ho Kim: Internet of Things Platforms and Services Trends, Journal of The Korean Institute of Communication Sciences, Korea Institute Of Communication Sciences , vol.31 no.4 , pp (2014)
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5. Advanced Science and Technology Letters
Vol.106 (Information Technology and Computer Science 2015)
Heum Park: Task Model and Task Ontology based on Mobile Users' Generic Activities for Task-Oriented Tourist Information Service, International Journal of Smart Home, vol.7, no.3, pp33-44 (2013)
Ill Chul Doo, Hyunwook Shin, ChangSoo Sung, Jungmin Byun: Study on the Paradigm Shift in Exhibition Culture Facilities by the Smart Device Technologies, International Journal of Software Engineering and Its Applications, vol.7, no.6, pp (2013)
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