Research on the output characteristics of laser wireless power transmission system with nonuniform laser irradiation

Qing-dong, Yang; Yang, Huomu; Wang, Jun; Gou, Yudan; Li, Juan; Zhou, Shouhuan

doi:10.1117/1.oe.61.6.067106

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…Regulations, standards, and rules are updated periodically to reflect the expansion of applications and technological advancements. Despite recent active research into OWPT, the safety aspects of this technology warrant additional initiatives and exploration [12][13][14]. Recent developments in OWPT have led to the creation of several safety systems tailored to specific factors, each characterized by unique features.…”

Section: Introductionmentioning

confidence: 99%

Camera-Based Safety System for Optical Wireless Power Transmission Using Dynamic Safety-Distance

Zuo,

Miyamoto

2024

Photonics

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This paper introduces a new safety approach for Optical Wireless Power Transmission (OWPT), a technology that is integral to the new kinds of Wireless Power Transmission technology (WPT). It starts from the fundamental configuration of the current OWPT system, addressing the safety concerns related to lasers by involving laser irradiation hazards, laser exposure regulation and guidelines, and a comparison with other safety methods. A camera-based OWPT safety system focused on the emission control of the light source is proposed, and it utilizes a depth camera and finely tuned computer vision-based control program. Through meticulous system design and experiments, the proposed system can detect moving objects in a limited indoor environment and control the laser/LED light transmission according to the object’s velocity dynamically. Various functions and exclusive improvements towards OWPT operation are mentioned, and Dynamic Safety-Distance is proposed as the core mechanism of the safety system. Through on-site experiments, indoor safety control and system operation’s evaluation are discussed, acknowledging both the advantages and limitations of the proposed safety system. This paper concludes with suggestions for further developments in camera-based OWPT safety incorporating the concept of Automatic Emission Control.

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Section: Introductionmentioning

confidence: 99%

Camera-Based Safety System for Optical Wireless Power Transmission Using Dynamic Safety-Distance

Zuo,

Miyamoto

2024

Photonics

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Wide-bandgap III-V materials for high efficiency air and underwater optical photovoltaic power transmission

Sanmartín,

Almonacid,

Ceballos

et al. 2024

Solar Energy Materials and Solar Cells

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Thermal process of a silicon wafer under a CW laser and 100–10000 Hz pulsed laser irradiation

Jia,

Sun,

Chen

et al. 2023

Appl. Opt.

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The thermal process of a (001) silicon wafer subjected to a continuous-wave (CW) laser and 100–10000 Hz pulsed laser irradiation is investigated experimentally and numerically. The temperature evolution of the spot center is measured using an infrared radiation pyrometer. The waveforms of the temperature evolution curves provide valuable information about melting, solidification, vaporization, and fracture. To gain a better understanding of the thermal process, a three-dimensional finite element model is established, and numerical simulations are conducted to analyze the temperature, stress, and dislocation field. The results show that the 10 kHz laser exhibits the highest heating efficiency before vaporization, but the lowest ablation efficiency after vaporization due to the shielding effect of vapor. The diffusion time of vapor is found to be more than 50 µs. Fracture occurs during 1 kHz laser irradiation. The motion of liquid may play a significant role, but it cannot be evidenced by a simulation due to complex dependence of material parameters on dislocation. This issue should be addressed as a priority in future studies.

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Research on the output characteristics of laser wireless power transmission system with nonuniform laser irradiation

Cited by 3 publications

References 28 publications

Camera-Based Safety System for Optical Wireless Power Transmission Using Dynamic Safety-Distance

Camera-Based Safety System for Optical Wireless Power Transmission Using Dynamic Safety-Distance

Wide-bandgap III-V materials for high efficiency air and underwater optical photovoltaic power transmission

Thermal process of a silicon wafer under a CW laser and 100–10000 Hz pulsed laser irradiation

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