Indoor Location Control with Visible Light Communication

Gökrem, Levent; Durgun, Mahmut; Durgun, Yeliz

doi:10.1109/aiact.2019.8847765

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…Salah satu jenis sensor yang memenuhi kriteria tersebut adalah sensor fototransistor TEMT6000, sensor ini memiliki luas permukaan tangkap 2,45 x 2,00 mm dengan sudut tangkap 60° (Vishay Semiconductors 2011). Maulana, Triwiyanti dan Dian, (2015) memanfaatkan sensor TEMT6000 sebagai Luxmeter dengan hasil pembacaan optimum pada tegangan keluaran 4 V sampai 5 V. Sensor TEMT6000 memiliki waktu respon 15ms (Gökrem, Durgun, and Durgun 2019).…”

Section: Pendahuluanunclassified

Rancang Bangun Alat Penentu Panjang Fokus Pada Lensa Bikonveks Menggunakan Sensor Temt6000 Dan Motor Stepper

Taqwim

Sucahyo

Yantidewi

2021

IFI

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Abstrak Penelitian ini bertujuan untuk merancang instrumen pengukuran panjang fokus lensa bikonveks secara otomatis. Dengan menerapkan sifat lensa bikonveks dimana berkas-berkas sinar yang paralel terhadap sumbu lensa akan dibiaskan dan berpotongan pada titik fokus. Titik fokus lensa ditentukan menggunakan sensor TEMT6000 dan panjang fokusnya diukur meggunakan motor stepper. Sinar dari dua buah laser dioda yang dipasang sejajar terhadap sumbu lensa akan berpotongan pada titik fokus sehingga intensitas di titik tersebut akan maksimum. Sensor TEMT6000 yang terhubung dengan motor stepper bergerak linier sesumbu dengan sumbu lensa dan berhenti pada titik fokus lensa karena hasil pembacaan sensor bernilai maksimum pada titik tersebut. Mikrokontroler akan menghitung jarak yang ditempuh sensor dan menampilkannya pada display sebagai panjang fokus lensa. Instrumen ini akan diujicobakan pada tiga buah lensa yang memiliki spesifikasi panjang fokus 100 mm, 150 mm, 200 mm, 250 mm dan 300 mm. Berdasarkan penelitian yang dilakukan, panjang fokus hasil pengukuran secara otomatis adalah: 103,8 mm untuk lensa berspesifikasi panjang fokus 100 mm dengan tingkat kesalahan 3,8%, 153,1 mm untuk lensa berspesifikasi panjang fokus 150 mm dengan tingkat kesalahan 2,1%, 203,2 mm untuk lensa berspesifikasi panjang fokus 200 mm dengan tingkat kesalahan 1,6%, 253,2 mm untuk lensa berspesifikasi panjang fokus 250 mm dengan tingkat kesalahan 1,3%, 303,5 mm untuk lensa berspesifikasi panjang fokus 300 mm dengan tingkat kesalahan 1,1%. Penyebab terjadinya penyimpangan titik fokus adalah berkas sinar yang berasal dari laser tidak sejajar dengan sumbu lensa dikarenakan terjadi penyimpangan sudut tembak laser. Kata Kunci: panjang fokus lensa bikonveks, sensor TEMT6000, motor stepper Abstract This study aims to design an automatic instrument for measuring the focal length of biconvex lens. By applying the property of a biconvex lens, the rays parralel to the axis of the lens will be refracted and intersect at the focal point. The focal point of the lens was determined using a TEMT6000 sensor and the focal length measured using a stepper motor. The rays from the two laser diodes that were placed parallel to the lens axis would intersect at the focal point so that the intensity at that point would be maximum. TEMT6000 sensor which is connected to the stepper motor moves linearly about the lens axis and stops at the focal point of the lens because the sensor reading is maximum at that point. Microcontroller would calculate the distance travelled by the sensor and show it on the display as the focal length of the lens. The instrument would be tested on five lenses that have focal length specifications of 100 mm, 150 mm, 200 mm, 250 mm and 300 mm. Based on the research wich has been done, focal length of the automatic measurement results is: 103,8 mm for the lens with the specification of focal length 100 mm and the error was 3,8%, 153,1 mm for the lens with the specification of focal length 150 mm and the error percentage is 2,1%, 203,2 mm for the lens with the specification of focal length 200 mm and the error percentage was 1,6%, 253,2 mm for the lens with the specification of focal length 250 mm and the error percentage was 1,3%, 303,5 mm for the lens with the specification of focal length 300 mm and the error percentage was 1,1%. The cause of focal point deviation is, ray from the laser was not parallel to the lens axis due to laser beam angle deviation. Keywords: focal length of biconvex lens, TEMT6000 sensor, stepper motor

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Section: Pendahuluanunclassified

Rancang Bangun Alat Penentu Panjang Fokus Pada Lensa Bikonveks Menggunakan Sensor Temt6000 Dan Motor Stepper

Taqwim

Sucahyo

Yantidewi

2021

IFI

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“…1W Power LED was used as a transmitter, together with the IRFZ44N Mosfet circuit and a TEMP6000 Light Sensor-Phototransistor was used as a receiver. The 1W LED and TEMP6000 light sensor were controlled by Atmega328 (Arduino) (Gözüaçık & Gökrem, 2020;Gökrem et al, 2019;Durgun & Gökrem, 2020).…”

Section: Visible Light Communicationmentioning

confidence: 99%

Indoor Navigation with Visible Light Communication using Genetic Algorithm

Gözüaçik¹,

Altıok²,

Gökrem³

2021

European Journal of Science and Technology

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Today, people prefer supermarkets where they can meet all their needs today for their daily needs. People prefer large markets where they can meet all their needs today for their daily needs. These markets, which have a lot of product capacity, mean more waste of time for the consumer. In such indoor and large areas, it is necessary to plan a route to prevent loss of time. In this study, location determination process was made with visible light communication (VLC) in closed areas and the most suitable route was determined by using Genetic Algorithm (GA) with these locations. It is thought that wireless communication resources will not be sufficient in the future due to the density. VLC systems, developed to solve this problem, are a communication system that uses the light source for data transmission. It has been seen in related studies that this system is quite successful in terms of speed, reliability and energy efficiency. VLC systems basically use a transmitter, receiver and microcontroller for their control. In this study, LED light source, TEMP6000 phototransistor-light sensor and ATMEGA328P (Arduino) are used. Due to its very fast on and off feature, the data sent from the LED light source, is detected by the light sensor TEMP6000. After that, it was modulated using On-Off Keying (OOK). In addition to data transmission, VLC systems, which can be used to determine location especially in indoor areas, can also be used for indoor navigation. Also in this study, indoor positioning is designed on the basis of a market application with VLC. The location data was obtained according to the signal strength, which was transferred from the receiver to Matlab. The operation of the system has been tested on the basis of light sources, products under these sources and the shortest path to the products selected by the user. The shortest distance between the stops selected for this navigation process was found by the Floyd-Warshall algorithm. The shortest path was determined by using a GA for the stops with known distance between them, as in the Traveling Salesman Problem (TSP). In this way, the customer will be able to minimize the time and energy consumed in the market.

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Visible Light Communications through Diffusive Illumination of Sculptures in a Real Museum

Meucci

Seminara

Tarani³

et al. 2021

JSAN

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The recent, massive diffusion of LED-based illumination devices makes Visible Light Communications (VLC) a widely recognised wireless communication technology with large potential impact in many indoor and outdoor applications. In the indoor scenario, one of the most promising VLC implementations is foreseen in museums, exhibitions and cultural heritage sites. In this context, digital data can be transmitted by the specific lighting system of each artwork and received by the nearby standing visitors, allowing a complete set of dedicated services such as augmented reality (AR) and real-time indoor positioning, exploiting the directionality of the optical channel. In this work, we achieve, for the first time, VLC transmission through diffusive LED illumination of three-dimensional artworks (wooden and marble sculptures) in a real museum, exploiting the available LED illumination system, demonstrating the feasibility of VLC technology also when complex three-dimensional artworks, such as sculptures or bas-reliefs, are involved. In our experimental campaign, performed inside the Basilica of Santa Maria Novella in Florence, we perform extensive Packet Error Rate (PER) and Signal-to-Noise Ratio (SNR) tests on two important wooden and marble sculptures (Crucifix by Brunelleschi and the Holy Water Font by Bordoni, respectively), for different distances, view angles and configurations, in order to mimic a wide set of situations that visitors may encounter in a realistic scenario. We achieve successful VLC transmission for distances up to 8 m from artworks, at baud rate of 28 kBaud. We also provide detailed results on the characterization of the transmission Field of View (FoV) for our prototype, as well as the effect of side shifts of the observer’s position on the quality of VLC transmission, providing essential information for future implementations of positioning protocols and dedicated services in realistic, indoor scenarios. Our work represents an important step forward towards the deployment of VLC technology in museums and, more in general, it opens for far-reaching developments in a wide set of real indoor environments, including the cultural heritage sector, where diffusive VLC links exploiting illumination of three-dimensional objects could represent a ground-breaking innovation.

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Indoor Location Control with Visible Light Communication

Cited by 3 publications

References 8 publications

Rancang Bangun Alat Penentu Panjang Fokus Pada Lensa Bikonveks Menggunakan Sensor Temt6000 Dan Motor Stepper

Rancang Bangun Alat Penentu Panjang Fokus Pada Lensa Bikonveks Menggunakan Sensor Temt6000 Dan Motor Stepper

Indoor Navigation with Visible Light Communication using Genetic Algorithm

Visible Light Communications through Diffusive Illumination of Sculptures in a Real Museum

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