scholarly journals TRAFFIC LIGHT SYSTEMS MENGGUNAKAN VISIBLE LIGHT COMMUNICATION (VLC) SEBAGAI ALAT BANTU TUNANETRA UNTUK MENYEBERANG JALAN

2020 ◽  
Vol 22 (1) ◽  
pp. 34
Author(s):  
Arsyad Ramadhan Darlis ◽  
Dean Adrian
Keyword(s):  
Visible Light ◽  
Audio Signal ◽  
Visible Light Communication ◽  
Outdoor Environment ◽  
Wearable Device ◽  
Color Filter ◽  
Traffic Light ◽  
Traffic Lights ◽  
Yellow Filter ◽  
Information Signal

The people with visual impairment have problems in mobility and orientation, especially in the outdoor environment. Recently, traffic lights systems, which is a facility where someone crosses do not support visually implaired people so they still need help from others in crossing the road. In this study, a system that integrates traffic lights is implemented using Visible Light Communication (VLC) technology, where the VLC transmitter is mounted on a traffic light, and the VLC receiver is installed as a wearable device that can be used with the audio information signal. The measurement  is done by considering the use of color filters. The measurement results show that the transmitter system has been able to send signals with audio frequencies from 300 Hz to 4000 Hz. Besides that, receiving an information signal consisting of a audio signal from a transmitter mounted on a traffic light with a red, yellow and green color filter can be received by a VLC receiver that is placed on a visually impaired person of good quality with the signal voltage received above 4 Vpp, where the use of a yellow filter shows the best signal reception results with a voltage output of 5.00 Vpp at a frequency of 2400 Hz compared to other color filters.ABSTRAK: Penyandang tuna netra memiliki masalah dalam hal mobilitas dan orientasi, khususnya di lingkungan luar (outdoor). Pada sistem yang terdapat pada lampu lalu lintas (traffic light) yang merupakan fasilitas dimana seseorang menyebrang saat ini belum mendukung penyandang tuna netra, sehingga sampai saat ini masih membutuhkan bantuan orang lain dalam menyebrang jalan. Pada penelitian ini, sebuah sistem yang diintegrasikan pada lampu lalu lintas diimplementasikan menggunakan teknologi Visible Light Communication (VLC), dimana VLC transmitter dipasang pada lampu lalu lintas dan VLC receiver dipasang sebagai wearable device dengan sinyal informasi suara digunakan oleh penyandang tunanetra sehingga dapat menerima informasi mengenai kondisi lampu lalu lintas pada saat itu. Pengujian sistem dilakukan dengan mempertimbangkan penggunaan filter berwarna. Hasil pengukuran menunjukan bahwa sistem transmitter telah dapat mengirimkan sinyal dengan frekuensi suara dari 300 Hz sampai 4000 Hz. Disamping itu, penerimaan sinyal informasi berupa sinyal suara dari transmitter yang terpasang pada lampu lalu lintas dengan filter warna Merah, Kuning dan Hijau  telah dapat diterima oleh receiver yang ditempatkan pada penyandang tuna netra dengan kualitas baik dengan tegangan sinyal yang diterima diatas 4 Vpp, dimana penggunaan filter warna kuning menunjukan hasil penerimaan sinyal yang paling baik dengan tegangan output 5,00 Vpp pada frekuensi 2400 Hz dibandingkan dibandingkan penggunaan filter warna lainnya

Researching the Information of Transmission Technology Based on Traffic Lights

2014 ◽  
Vol 644-650 ◽  
pp. 4538-4541
Author(s):  
Qiang Li ◽  
Xin Rui Zhang
Keyword(s):  
Visible Light ◽  
Image Recognition ◽  
Communication Technology ◽  
High Speed ◽  
Visible Light Communication ◽  
Qr Code ◽  
Visible Light Communications ◽  
Traffic Light ◽  
Traffic Lights ◽  
Very High

This design is based on Visible Light Communication Technology, to achieve outdoor visible light communications and image recognition etc. through traffic lights. It will play a role on promoting the utilization of traffic lights. The system uses a LED dot matrix to imitate the traffic light, loading QR Code information on the LED dot matrix and then transporting it in a very high-speed flashing. In receiving terminal, first, webcam OV7670 collects information which from the LED dot matrix, then conveys the picture to FPGA, which is the processor. FPGA will handle the picture by gray scale processing, medium filtering and binary processing at last. Thus, the picture from the LED dot matrix will change to ‘0’ and ‘1’ in binary area. Secondly, as there’s a relationship between LED dot matrix and webcam pixels, we can count how many pixels represent one LED. Finally, we can decode the QR Code based on its own style, and display the final result on the TFT screen.

scholarly journals Bidirectional Underwater Visible Light Communication

2018 ◽  
Vol 8 (6) ◽  
pp. 5203
Author(s):  
Arsyad Ramadhan Darlis ◽  
Andre Widura ◽  
Muhamad Rifan Andrian
Keyword(s):  
Visible Light ◽  
Visible Light Communication ◽  
Experimental Result ◽  
Color Filter ◽  
Optical Channel ◽  
Water Tank ◽  
Underwater Environment ◽  
Information Signal ◽  
Blue Wavelength ◽  
The One

In this paper, a novel bidirectional underwater visible light communication (BiUVLC) is proposed. The VLC transmitter transmits an information signal using the one of RGB LED through the water tank that represents an underwater environment and then is received by VLC receiver via a color filter. The color LEDs and color filters are utilized in bidirectional systems. The single link is created by a LED on the transmitter and the color filter on the receiver with the same color which represents a single wavelength. The performance of the proposed BiUVLC system was evaluated via implementations. The experimental result shows that the transmitted signal undergoes attenuation over the underwater optical channel and the pair of the blue wavelength in link 1 and the green wavelength in link 2 have the best performance than the other wavelength pair. In the crosstalk measurement, the red wavelength color is the worst in the underwater environment.

scholarly journals Color Filter Identification for Bidirectional Visible Light Communication

2018 ◽  
Vol 6 (2) ◽  
pp. 303
Author(s):  
ARSYAD RAMADHAN DARLIS ◽  
LITA LIDYAWATI ◽  
LUCIA JAMBOLA
Keyword(s):  
Visible Light ◽  
Communication Systems ◽  
Audio Signal ◽  
Visible Light Communication ◽  
Maximum Distance ◽  
Color Filter ◽  
Audio Frequency ◽  
Color Filters

ABSTRAKSaat ini, cahaya tampak dimanfaatkan oleh manusia hanya sebagai penerangan saja. Akan tetapi, beberapa penelitian telah membuktikan bahwa cahaya tampak dapat dimanfaatkan pula pada sistem komunikasi, yang dinamakan Visible Light Communication (VLC). Pada penelitian ini, sebuah metoda menggunakan color filter diidentifikasi dalam mengimplementasikan sistem bidirectional pada teknologi VLC. Dengan adanya penelitian ini, sebuah sistem bidirectional Visible Light Communication (Bi-VLC) dapat diimplementasikan dengan menggunakan color filter tertentu yang dipasangkan pada posisi uplink dan downlink. Sinyal informasi berupa sinyal audio ditansmisikan melalui VLC transmitter (Tx) yang dipasang color filter dan diterima oleh color filter pada VLC receiver (Rx) setelah melalui media cahaya. Pengujian menunjukan bahwa sistem telah dapat melewatkan sinyal pada frekuensi audio dengan jarak maksimum dari sistem adalah 2,3 m. Sedangkan pasangan color filter yang memiliki kinerja paling baik untuk BI-VLC adalah Azure (Tx) dengan Charteuse Green (Rx), Charteuse Green (Tx) dengan Charteuse Green (Rx), dan Rose (Tx) dengan Charteuse Green (Rx).Kata kunci: Bidirectional, Visible Light Communication (VLC), Color Filter, AudioABSTRACTCurrently, visible light are utilized by humans as illumination only. However, several research have proven that visible light can also be used in communication systems, called Visible Light Communication (VLC). In this research, a method of using color filters was identified for bidirectional systems on VLC technology. With this research, a bidirectional Visible Light Communication (Bi-VLC) system can be implemented using a specific color filter paired in uplink and downlink mode. The audio signal as information is transmitted through a VLC transmitter (Tx) installed by a color filter and received by the color filter on the VLC receiver (Rx) after going through the light media. The result shows that the system has been able to pass the signal at the audio frequency with the maximum distance of the system is 2.3 m. While the best performance of color filter pair for BI-VLC is Azure (Tx) with Charteuse Green (Rx), Charteuse Green (Tx) with Charteuse Green (Rx), and Rose (Tx) with Charteuse Green (Rx).Keywords: Bidirectional, Visible Light Communication (VLC), Color Filter, Audio

Detection of LED traffic light by image processing for visible light communication system

2009 ◽  
Author(s):  
H. Chinthaka ◽  
N. Premachandra ◽  
Tomohiro Yendo ◽  
Takaya Yamasato ◽  
Toshiaki Fujii ◽  
...  
Keyword(s):  
Image Processing ◽  
Visible Light ◽  
Communication System ◽  
Visible Light Communication ◽  
Traffic Light

scholarly journals Sistem Komunikasi Suara Bawah Air dengan Metoda Simplex menggunakan Visible Light Communication (VLC)

2019 ◽  
Vol 7 (2) ◽  
pp. 253
Author(s):  
LUCIA JAMBOLA ◽  
ARSYAD RAMADHAN DARLIS ◽  
LITA LIDYAWATI ◽  
DZIKRI FACHRI HUSAENI
Keyword(s):  
Visible Light ◽  
Communication Systems ◽  
Light Transmission ◽  
Visible Light Communication ◽  
Color Filter ◽  
Underwater Communication ◽  
Test Results ◽  
Voice Communication ◽  
Yellow Color ◽  
Long Time

ABSTRAKSistem komunikasi suara bawah air telah dikenal sejak lama, diantaranya sonar dan akustik. Seiring perkembangan zaman dan kemajuan teknologi, kini hadir komunikasi dengan media transmisi cahaya tampak yaitu Visible Light Communication (VLC) yang dapat diterapkan pada komunikasi bawah air. Pada penelitian ini telah dilakukan komunikasi suara bawah air (simplex) menggunakan VLC, dengan media akuarium berisi air dan beberapa pengujian diantaranya menggunakan color filter, didapat hasil pengujian terbaik yaitu tegangan 4,4 Vpp dan frekuensi 3,003 kHz untuk color filter yellow, pengujian menggunakan lensa didapat hasil pengujian terbaik yaitu tegangan 4,4 Vp-p dan frekuensi 3,051 kHz untuk lensa (+50), dan pengujian terakhir menggunakan lampu UV didapat hasil pengujian terbaik dengan tegangan 4,4 Vp-p dan frekuensi 3,010 kHz. Implementasi sistem VLC ini menunjukkan hasil yang baik dan layak untuk diterapkan pada komunikasi suara bawah air (simplex).Kata kunci: VLC, Komunikasi Suara Bawah Air, Simplex. ABSTRACTUnderwater voice communication systems have been known for a long time, including sonar and acoustics. Along with the development and advancement of technology, now there is communication with visible light transmission media, namely Visible Light Communication (VLC) which can be applied to underwater communication. Under this study underwater voice communication (simplex) has been carried out using VLC, with aquarium media containing water and several tests including using a color filter, the best test results obtained are voltage 4.4 Vp-p and frequency 3.003 kHz for yellow color filter, testing using the lens obtained the best test results namely voltage 4.4 Vp-p and frequency 3.051 kHz for lenses (+50), and the last test using UV lights obtained the best test results with a voltage of 4.4 Vp-p and a frequency of 3.010 kHz. The implementation of the VLC system shows good and feasible results to be applied to underwater voice communication (simplex).Keywords: VLC, Underwater Voice Communication, Simplex.

scholarly journals Sistem Komunikasi Audio dengan Teknologi Visible Light Communication (VLC) Menggunakan Laser Led

2021 ◽  
Vol 12 (2) ◽  
Author(s):  
Atik Charisma ◽  
Rizky Nur Akbar Setiawan ◽  
Een Taryana ◽  
Hajiar Yuliana ◽  
Alifa Rike Indriani
Keyword(s):  
Visible Light ◽  
Visible Light Communication ◽  
Sound Quality ◽  
Solar Panel ◽  
Wireless Technology ◽  
Information Signal ◽  
The People ◽  
Dark Conditions ◽  
Audio Communication ◽  
The Times

Kegiatan masyarakat di era sekarang yang serba digital menggunakan teknologi tanpa kabel (wireless). Teknologi tanpa kabel menjadi andalan komunikasi, namun seiring perkembangann zaman, ada sebuah teknologi tanpa kabel dengan memanfaatkan cahaya tampak.  Teknologi ini dikenal dengan istilah visible light communication (VLC). Sistem VLC terdiri dari bagian transmitter dan receiver. Transmitter berupa komponen-komponen elektronika yang terintegrasi dengan cahaya tampak sebagai media transmisi. Pada penelitian ini membuat bagian transmitter dan receiver untuk komunikasi audio. Cahaya tampak sebagai media transmisi menggunakan laser led karena cahaya dari laser led ini lebih fokus dan pancaran cahayanya lebih jauh dibandingkan dengan yang lain. Sedangkan di sisi receiver menggunakan solar panel sebagai penerima sinyal informasi yang dikirimkan. Penelitian ini berhasil membuat sebuah sistem komunikasi audio berbasis visible light communication. Variasi jarak antara transmitter dan receiver mempengaruhi kualitas suara yang diterima. Pada jarak 500 cm kualitas suara yaitu 99,2 dB pada kondisi gelap dan 99,1 dB kondisi terang. Perubahan sudut pancar transmitter terhadap receiver juga mempengaruhi hasil kualitas suara. Kualitas suara terbaik pada sudut 900 di kondisi terang dengan jarak 50 cm sebesar 97,9 dB sedangkan di kondisi gelap dengan jarak 50 cm  pada sudut 1000 sebesar 98,1 dB.   Abstract The people activities in today's digital era use wireless technology. Wireless technology has become the mainstay of communication, but along with the times, there is a wireless technology that uses visible light. This technology is known as visible light communication (VLC). The VLC system consist of transmitter and receiver. Transmitters are electronic components that are integrated with visible light as a transmission medium. In this study, the transmitter and receiver are made for audio communication. Visible light as a transmission medium uses an LED laser because the light from this LED laser is more focused and the light beam is farther away than the others. While on the receiver side using a solar panel as a receiver of the information signal that is sent. This research succeeded in making an audio communication system based on visible light communication. Variations in the distance between the transmitter and receiver affect the quality of the received sound. At a distance of 500 cm in dark conditions, the sound quality is 99.2 dB in light conditions and 99.1 dB. Changes in the beam angle of tranmitter to receiver also affect the sound quality. The best sound quality at an angle of 900 in bright conditions with a distance of 50 cm is 97.9 dB while in dark conditions with a distance of 50 cm at an angle of 1000 is 98.1 dB.

Employing Traffic Lights as Road Side Units for Road Safety Information Broadcast

2015 ◽  
pp. 143-159
Author(s):  
Navin Kumar ◽  
Luis Nero Alves ◽  
Rui L. Aguiar
Keyword(s):  
Traffic Safety ◽  
Intelligent Transportation Systems ◽  
Safety Information ◽  
Visible Light Communication ◽  
Transportation Systems ◽  
Vehicular Communication ◽  
Traffic Light ◽  
Traffic Lights ◽  
The Road ◽  
Smooth Flow

There is great concern over growing road accidents and associated fatalities. In order to reduce accidents, improve congestion and offer smooth flow of traffic, several measures, such as providing intelligence to transport, providing communication infrastructure along the road, and vehicular communication, are being undertaken. Traffic safety information broadcast from traffic lights using Visible Light Communication (VLC) is a new cost effective technology which assists drivers in taking necessary safety measures. This chapter presents the VLC broadcast system considering LED-based traffic lights. It discusses the integration of traffic light Roadside Units (RSUs) with upcoming Intelligent Transportation Systems (ITS) architecture. Some of the offered services using this technology in vehicular environment together with future directions and challenges are discussed. A prototype demonstrator of the designed VLC systems is also presented.

scholarly journals High Precision Vehicle Location Technologies Based on Traffic Lights

2016 ◽  
Vol 3 (1) ◽  
pp. 9
Author(s):  
Yan Cao ◽  
Tao Lei
Keyword(s):  
High Precision ◽  
Electromagnetic Interference ◽  
Visible Light Communication ◽  
Traffic Light ◽  
Positioning Precision ◽  
Traffic Lights ◽  
Signal Light ◽  
Positioning Method ◽  
Vehicle Positioning ◽  
Improved Methods

According to the low positioning precision and high cost of traditional vehicle positioning technologies, and combined advantages of the newly arisen visible light communication like no extra transmitter needed, no electromagnetic interference and free license, this paper proposed a vehicle positioning method based on traffic light, which could generate the vehicle's position with the time difference of arrival of the signal light. Also its improved methods based on plan revolution theory were discussed to overcome the deficient in non-coplanar condition and improve the positioning precision. Simulation results showed that these methods, with simple computation and low implementation cost, could realize a real-time high-precision positioning performance, and could meet the requirements of the intelligence transportation system.

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