Enhancement of beam tracking response using color filtering method for optical wireless power transmission

Adinanta, Hendra; Kato, Hirokazu; Putra, Alexander William Setiawan; Minamikawa, Takeo

doi:10.1063/5.0022440

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…Using the spatial light modulator (SLM), we conducted an experiment to assess the impact of angle variation on the efficiency of a solar cell as shown in Figure (5) experimental setup. By employing the SLM, a semiconductor laser collimator beam was precisely shaped to match the desired configuration of the solar cell.…”

Section: Measurement Angle Dependency Of Photocurrentmentioning

confidence: 99%

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Stabilization of optical wireless power transmission system using spatial light modulator

Myo Thu,

Maruyama

2023

Laser Beam Shaping XXIII

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Optical Wireless Power Transmission (OWPT) system, using beam shaping, is a promising technology that involves a transmitter side using a laser and a receiver side using solar cells to transfer power wirelessly over long distances. The system faces a challenge of potential mismatch between both sides, which can lead to low efficiency of power transfer. The objective of this research is to improve the mismatch between the beam shape of a semiconductor laser light source and the shape of a photodetector solar cell. The shape of a typical solar cell is rectangular, which does not match the circular beam shape of the light source, resulting in lower power conversion efficiency. To address this, methods have been proposed to beam shape into a rectangle using Fresnel lenses or rectangular core optical fibers. However, the distance from the solar cell and the rotation of the solar cell itself change the size of the beam, resulting in a trapezoidal image as seen from the light source. In this study, we report the results of an evaluation of the change in efficiency with respect to changes in the object, using a spatial light modulator (SLM) that can arbitrarily shape the light beam. Specifically, we evaluate how adjusting the shape of a circular beam onto a solar cell target using the SLM leads to a decrease in photocurrent, and how recognizing an object's beam shape in real-time to control a camera using machine learning can predict object shape for error suppression compared to linear prediction.

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Section: Measurement Angle Dependency Of Photocurrentmentioning

confidence: 99%

“…WPT systems increase device durability, flexibility, and mobility by eliminating the need for battery replacement. Basic components include a transmitter, receiver, and unconfined space for wave transmission [3]- [5].…”

Section: Introductionmentioning

confidence: 99%

Stabilization of optical wireless power transmission system using spatial light modulator

Myo Thu,

Maruyama

2023

Laser Beam Shaping XXIII

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“…The launcher controls based on a pneumatic system capable of shooting a unique automatic marker proposed is a close loop control [23]. Furthermore, several calculation steps are needed to adjust the air pressure in the system.…”

Section: Trajectory Systemmentioning

confidence: 99%

The Bullet Launcher with A Pneumatic System to Detect Objects by Unique Markers

Aulia,

Radila,

Azhary

et al. 2023

JICCE

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A bullet launcher can be developed as a smart instrument, especially for use in the military section, that can track, identify, detect, mark, lock, and shoot a target by implementing an image-processing system. In this research, the application of object recognition system, laser encoding as a unique marker, 2-dimensional movement, and pneumatic as a shooter has been studied intensively. The results showed that object recognition system could detect various colors, patterns, sizes, and laser blinking. Measuring the average error value of the object distance by using the camera is ±4, ±5, and ±6% for circle, square and triangle form respectively. Meanwhile, the average accuracy of shots on objects is 95.24% and 85.71% in indoor and outdoor conditions respectively. Here, the average prototype response time is 1.11 s. Moreover, the highest accuracy rate of shooting results at 50 cm was obtained 98.32%.

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“…If the current is higher than 20mA, the LED will burn. Changing the electric current on LED according to a certain pattern at a certain time can produce LED blinking [19] [20]. In this work, the aim to develop an object recognition system and unique marker by using a variety of LED blinking.…”

Section: Introductionmentioning

confidence: 99%

Encoding LED for Unique Markers on Object Recognition System

Tresna¹,

Ahmad²,

Isnaeni³

et al. 2021

IJACSA

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In this paper a new approach of unique markers to detect and track moving objects with the encoding LED marker is presented. In addition, an LED spotlight system that can shoot light in the direction of the target is also proposed. The encoding process is done by making a unique blinking pattern on the LED, and thus the camera and a servomotor as an object recognition system would only recognize a unique marker given by an LED. In this work the camera with OpenCV could capture a unique marker in all variant of blinking patterns. A unique marker is important on object recognition system so the camera could identify the object marked by our unique marker and ignore all other markers that might captured by the camera. In addition, analysis of the PWM signal from an LED is carried out here to determine the characteristics of the LEDs in each color, determine the accuracy of the duty cycle, and the use of the bright-dim method on the LEDs. The results show that the highest accuracy is obtained when a 50% duty cycle is used with the on and off time are set to be 1 second for all LED colors. The benefit of the proposed system is confirmed by implementing an integrated control system as a unique marker. The effectiveness of the blinking LED against other laser interferences is also discussed.

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Enhancement of beam tracking response using color filtering method for optical wireless power transmission

Cited by 4 publications

References 4 publications

Stabilization of optical wireless power transmission system using spatial light modulator

Stabilization of optical wireless power transmission system using spatial light modulator

The Bullet Launcher with A Pneumatic System to Detect Objects by Unique Markers

Encoding LED for Unique Markers on Object Recognition System

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