Distance Measurement Systems Using Lasers and Their Applications

Fonseca, Joao Antonio Santos Dias; Baptista, António; Martins, Ma João; Torres, João Paulo N.

doi:10.5539/apr.v9n4p33

Cited by 13 publications

(5 citation statements)

References 4 publications

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“…These systems are treated as mature, thus, in the last two decades this problem was in fact not discussed. However, investigation of the laser method is still provided, for example [16][17][18]. The constant evolution of surveying technology has contributed to a greater variety of available tools, for example total stations and laser scanners.…”

Section: Shore Based Systemsmentioning

confidence: 99%

Measuring the Speed of Docking Ship with Total Station

Felski¹

2022

Komunikácie

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The big modern ships are the largest mobile objects that exist in nowadays world. Their huge mass and length in combination with their limited maneuverability can result in the risk of extreme destructions of the infrastructure, as well as environment, in the case of even minor malfunction of any of its elements. The main danger is the kinetic energy of such a colossus and in these circumstances the accuracy of information on the ship's speed becomes particularly important. This is the reason of a growing interest in various systems designed to support harbor pilots during the maneuvers. The most popular ones are based on laser-measurement of the distance, as the rule, installed as static installation in the quay. This article presents the results of the experiments of vessel’s speed measurements when approaching the quay with use the geodetic total stations in a reflectorless variant.

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Section: Shore Based Systemsmentioning

confidence: 99%

Measuring the Speed of Docking Ship with Total Station

Felski¹

2022

Komunikácie

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“…After the stage measurement, the distance and angle from each vertex of the stage to all cameras and the 2D LiDAR sensor are measured and input into the simulator to simulate the virtual stage and cameras, as shown in Figure 3(b). The camera position was calculated using a simple trigonometric function and Euclidean distance equation using the stage coordinates and the angle between the stage and the cameras [27,28].…”

Section: Stage Calibration and Human Datamentioning

confidence: 99%

Development for Multisensor and Virtual Simulator–Based Automatic Broadcast Shooting System

Lee

Lim

Kim

2022

International Journal of Digital Multimedia Broadcasting

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To solve the limitations of complexity and repeatability of existing broadcast filming systems, a new broadcast filming system was developed. In particular, for Korean music broadcasts, the shooting sequence is stage and lighting installation, rehearsal, lighting effect production, and main shooting; however, this sequence is complex and involves multiple people. We developed an automatic shooting system that can produce the same effect as the sequence with a minimum number of people as the era of un-tact has emerged because of COVID-19. The developed system comprises a simulator. After developing a stage using the simulator, during rehearsal, dancers’ movements are acquired using UWB and two-dimensional (2D) LiDAR sensors. By inserting acquired movement data in the developed stage, a camera effect is produced using a virtual camera installed in the developed simulator. The camera effect comprises pan, tilt, and zoom, and a camera director creates lightning effects while evaluating the movements of virtual dancers on the virtual stage. In this study, four cameras were used, three of which were used for camera pan, tilt, and zoom control, and the fourth was used as a fixed camera for a full shot. Video shooting is performed according to the pan, tilt, and zoom values of the three cameras and switcher data. Only the video of dancers recorded during rehearsal and that produced by the lighting director via the existing broadcast filming process is overlapped in the developed simulator to assess lighting effects. The lighting director assesses the overlapping video and then corrects parts that require to be corrected or emphasized. The abovementioned method produced better lighting effects optimized for music and choreography compared to existing lighting effect production methods. Finally, the performance and lighting effects of the developed simulator and system were confirmed by shooting using K-pop using the pan, tilt, and zoom control plan, switcher sequence, and lighting effects of the selected camera.

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“…Laser dapat dikategorikan menjadi dua berdasarkan jenis keluarannya, yaitu laser pulsa dan laser kontinu. Laser Rangefinder termasuk laser pulsa yang dapat digunakan untuk mengukur jarak [13]. Selain komponen utama berupa sensor jarak dan sensor sudut, ada beberapa komponen tambahan, yaitu: push button berfungsi sebagai pengambil data, keypad berfungsi memasukkan data tebal pelat untuk mendapatkan nilai diameter dalam karena hasil pengukuran berupa diameter luar, MicroSD berfungsi menyimpan hasil akhir (diameter) dan LCD berfungsi menampilkan (diameter, sudut dan jarak secara realtime).…”

Section: Laser Rangefinderunclassified

Prototipe Alat Bantu Pengukur Diameter Cincin Referensi Tangki Ukur Tetap Silinder Tegak

Firmansyah¹

2022

joki

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Tangki Ukur Tetap Silinder Tegak (TUTSIT) selain dapat berfungsi sebagai alat penyimpanan dapat juga berfungsi sebagai alat ukur. Untuk menjaga akurasi hasil pengukuran, setiap alat ukur perlu dilakukan pengujian/kalibrasi. Terdapat beberapa metode untuk menguji TUTSIT, salah satunya metode optik dengan teodolit yang memiliki kelebihan yaitu waktu pengujian singkat dan keperluan jumlah personil yang sedikit. Selain kelebihan tersebut, teodolit tetap memiliki kekurangan yaitu harga yang mahal, menggunakan personil khusus, dan pengolahan data masih manual. Pengujian TUTSIT memanfaatkan fungsi teodolit untuk pengukuran sudut dan pengukuran jarak. Pada makalah ini membuat prototipe yang dapat mengukur diameter cincin referensi sebagai langkah awal pengujian TUTSIT. Diameter referensi ini sebagai acuan untuk pengukuran diameter pada cincin di atasnya. Proses pengujian prototipe yaitu dengan membandingkan terhadap teodolit pada posisi yang sama. Hasil pengukuran diameter cincin referensi oleh prototipe lebih besar 15,8 mm dibandingkan dengan teodolit. Adapun nilai-nilai karakteristik prototipe untuk akurasi sebesar 99,2%, presisi sebesar 99,9% dan kesalahan sebesar 0,8%. Prototipe ini memiliki potensi untuk dikembangkan sebagai alternatif ekonomis instrumen pengujian TUTSIT.

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Distance Measurement Systems Using Lasers and Their Applications

Cited by 13 publications

References 4 publications

Measuring the Speed of Docking Ship with Total Station

Measuring the Speed of Docking Ship with Total Station

Development for Multisensor and Virtual Simulator–Based Automatic Broadcast Shooting System

Prototipe Alat Bantu Pengukur Diameter Cincin Referensi Tangki Ukur Tetap Silinder Tegak

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