Automotive LiDAR pollution detection system based on total internal reflection techniques

Trierweiler, Manuel; Peterseim, Tobias; Neumann, Cornelius

doi:10.1117/12.2538416

Cited by 6 publications

(4 citation statements)

References 12 publications

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“…A doublet lens is typically used here, as well as singlets or aspheric lenses. The protection window is designed to protect the focusing optic against contamination from the cutting process and seclude the process gas volume [63].…”

Section: Focusing Systemmentioning

confidence: 99%

Laser Cutting Technologies and Corresponding Pollution Control Strategy

Xie

et al. 2022

Processes

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In conjunction with the increasing demand for material cutting, such as the decommissioning and dismantling of nuclear facilities, advanced cutting technologies need be developed to increase precision and cost-effectiveness. As compared with other cutting technologies, laser cutting offers advantages of greater cutting precision, accuracy, and customization. In this work, we investigated the constitution, classification, and current status of this technology. Pollutant emission during laser cutting, corresponding pollution control methods and apparatus were proposed as well. Laser cutting equipment mainly comprises an automated system integrating a fiber laser, industrial computer, servo motor control, electrical control, and detection technology. It mainly consists of mechanical and electrical control parts. Laser cutting equipment is distinguished by light source, power, and cutting dimensions. Known variants of laser cutting technology involve vaporization, fusion, reactive fusion, and controlled fracture cutting. During the cutting process, dust, smoke, and aerosols can be released, which is an environmental concern and poses a threat to public health. The selection of the dedusting method and design of apparatus should take into account the dust removal rate, initial capital cost, maintenance cost, etc. Multi-stage filtration such as bag filtration combined with activated carbon filtration or electrostatic filtration is accepted.

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Section: Focusing Systemmentioning

confidence: 99%

Laser Cutting Technologies and Corresponding Pollution Control Strategy

Xie

et al. 2022

Processes

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“…Fersch et al [25] did consider the influence of discrete rain drops on a pulsed LiDAR but this really only looked at rain on the aperture and they concluded the effect was non-critical in reducing power. Trierweiler et al [26] discussed steps to both detect and remove the presence of contaminants on sensors and any signal effect of very near-field distortion in the signal can be effectively gated in many cases.…”

Section: A Attenuation and Scattering Of The Signalmentioning

confidence: 99%

Full Waveform LiDAR for Adverse Weather Conditions

Wallace

Halimi

Buller

2020

IEEE Trans. Veh. Technol.

100

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We present and discuss the case for full waveform pixel and image acquisition and processing to enable LiDAR sensors to penetrate and reconstruct 3D surface maps through obscuring media. To that end, we review work on signal propagation, on scanning and arrayed sensors, on signal processing strategies for independent pixels and employing spatial context, on reducing complexity and accelerating processing by sensor design, algorithmic changes, compressed sensing, and parallel processing. We report several experimental studies on LiDAR imaging through complex media, and how these can inform the automotive LiDAR scenario. We conclude with a discussion of future development and potential for full waveform LiDAR (FWL).

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“…Contamination from unknown substances in the surroundings like blown up leaves and garbage could block the view of ADS sensors in a sudden. Particles from road dirt attached to the outer surface of the emitter window could worsen the LiDAR signal attenuation [115]. Tests with near-homogeneous dust particles being distributed on the surface of a scanner show a 75% reduction in LiDAR maximum range [116].…”

Section: Miscellaneous Issuesmentioning

confidence: 99%

“…Trierweiler et al [115] made an automatic control over the wiper and nozzle based on the same line of thought, only their detection is based on the total internal reflection on the windshield. Due to the difference in reflectivity and intensity distribution between liquid, like raindrops, and solid, like dust, they are able to differentiate the physical status of the pollution on the cover glass of the ADS sensors by splitting the out-coupled intensity from the red light diffuser into two sections.…”

Section: Contaminationmentioning

confidence: 99%

Perception and Sensing for Autonomous Vehicles Under Adverse Weather Conditions: A Survey

Zhang¹,

Carballo²,

Yang³

et al. 2021

Preprint

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Automated Driving Systems (ADS) open up a new domain for the automotive industry and offer new possibilities for future transportation with higher efficiency and comfortable experiences. However, autonomous driving under adverse weather conditions has been the problem that keeps autonomous vehicles (AVs) from going to level 4 or higher autonomy for a long time. This paper assesses the influences and challenges that weather brings to ADS sensors in an analytic and statistical way, and surveys the solutions against inclement weather conditions. Stateof-the-art techniques on perception enhancement with regard to each kind of weather are thoroughly reported. External auxiliary solutions like V2X technology, weather conditions coverage in currently available datasets, simulators, and experimental facilities with weather chambers are distinctly sorted out. By pointing out all kinds of major weather problems the autonomous driving field is currently facing, and reviewing both hardware and computer science solutions in recent years, this survey contributes a holistic overview on the obstacles and directions of ADS development in terms of adverse weather driving conditions.

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Automotive LiDAR pollution detection system based on total internal reflection techniques

Cited by 6 publications

References 12 publications

Laser Cutting Technologies and Corresponding Pollution Control Strategy

Laser Cutting Technologies and Corresponding Pollution Control Strategy

Full Waveform LiDAR for Adverse Weather Conditions

Perception and Sensing for Autonomous Vehicles Under Adverse Weather Conditions: A Survey

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