Atmospheric Pollution Monitoring in Urban Area by Employing a 450-nm Lidar System

Kong, Zheng; Liu, Zhi; Zhang, Lishan; Guan, Peng; Li, Limei; Mei, Liang

doi:10.3390/s18061880

Cited by 20 publications

(3 citation statements)

References 31 publications

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“…In this field of research, it is very interesting to apply LiDAR with the normalised difference vegetation index (NDVI) for studying diverse forestry topics [24]. Li-DAR has also been used to monitor atmospheric pollution [25] and to evaluate the impacts of wildfire on air quality [26]. It has also been applied to the study of atmospheric pollen from urban green infrastructure [27], given that cough and other allergic symptoms are related to tree pollen [28], considering the diurnal pattern of its vertical distribution [29] and its optical properties [30].…”

Section: Introductionmentioning

confidence: 99%

Integration of Aerobiological Information for Construction Engineering Based on LiDAR and BIM

et al. 2022

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In green urban areas, the allergenic factor is important when selecting trees to improve the quality of life of the population. An application of laser imaging detection and ranging (LiDAR) in building information modelling (BIM) is the capture of geo-referenced geometric information of the environment. This study presents the process of digitalisation of a green infrastructure inventory based on the geolocation and bioparameters of the cypress species. The aerobiological index (IUGZA) was estimated by developing green infrastructure BIM models at different detail levels and with a new BIM dimension (6D) for the urban environment. The novelty of the study is the modelling of urban information for evaluating the potential environmental impact related to the allergenicity of the urban green infrastructure using LiDAR through BIM. The measurements of cypress trees based on bioparameters and distances were applied to the IUGZA. This innovation for describing the current 3D environments and designing new scenarios in 6D may prevent future problems in urban areas during construction projects.

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Section: Introductionmentioning

confidence: 99%

Integration of Aerobiological Information for Construction Engineering Based on LiDAR and BIM

et al. 2022

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“…With the rapid development of artificial intelligence, internet, automation and sensors, three-dimensional (3D) imaging laser radar has been widely used in many fields, such as topographic mapping, [1] atmospheric detection, [2,3] environmental sensing, [4,5] target detection [6] and automatic driving, [7] due to its high measurement accuracy, good directionality, fast speed and less affected from the ground clutter. [8,9] At present, the mainstream 3D imaging lidar solutions include mechanical rotary lidar, micro-electromechanical system (MEMS) scanning lidar, optical phased array (OPA) and flash lidar.…”

Section: Introductionmentioning

confidence: 99%

Design of three-dimensional imaging lidar optical system for large field of view scanning

Zhang

Yan

et al. 2022

Chinese Phys. B

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3D lidar has been widely used in various fields. The MEMS scanning system is one of its most important components, while the limitation of scanning angle is the main obstacle for its application in various fields to improve the demerit. In this paper, a folded large field of view scanning optical system is proposed. The structure and parameters of the system are determined by theoretical derivation of ray tracing. The optical design software Zemax is used to design the system. After optimization, the final structure performs well in collimation and beam expansion. The results show that the scan angle can be expanded from ±5° to ±26.5°, and finally parallel light scanning is realized. The spot diagram at a distance of 100 mm from the exit surface shows that the maximum radius of the spot is 0.506 mm with a uniformly distributed spot. The maximum radius of the spot at 100 m is 19 cm, and the diffusion angle is less than 2 mrad. The energy concentration in the spot range is greater than 90% with a high system energy concentration, and the parallelism is good. This design overcomes the shortcoming of the small mechanical scanning angle of the MEMS lidar, and has good performance in collimation and beam expansion. It provides a design method for large-scale application of MEMS lidar.

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“…From a viewpoint of compact and easy-to-use systems, directions to downsize and make it a usable system have been explored. Micro pulse lidars (MPL), EZ lidar series (LEOSPHERE Co. Ltd.) and Laser Diode (LD) based lidars were developed for that purpose [15,16,17,18,19,20]. The former two aimed at creating an easy-to-use system, while the latter focused on it being compact.…”

Section: Introductionmentioning

confidence: 99%

LED Mini Lidar for Atmospheric Application

Shiina

2019

Sensors

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The creation of a compact and easy-to-use atmospheric lidar has been the aim of researchers for a long time. Micro Pulse Lidars (MPL) and commercialized ceilometers were designed for such purposes. Laser Diodes (LD) and Diode-Pumped Solid State (DPSS) Laser technology has evolved, making lidar system more compact; however, their vulnerability to static electricity and fluctuation of electrical power prevented the growth of atmospheric lidar technology as a system suited to all kinds of users. In this study, a mini lidar with a Light Emitting Diode (LED) -based light source was designed and developed. As LED lamp modules do not need a heat sink or fan, they are resilient and can emit light for long periods with constant intensity. They also offer ease of handling for non-professionals. On the other hand, a LED lamp module has a large divergence, when compared to laser beams. A prototype LED mini lidar was thus developed, with focus on transmitting power optimization and optical design. This low-cost lidar system is not only compact, but also offers near-range measurement applications. It visualizes rapid activities of small air cells in a close range (surface atmosphere), and can verify and predict the condition of the surface atmosphere. This paper summarizes the principle, design, practical use and applications of the LED mini-lidar.

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Atmospheric Pollution Monitoring in Urban Area by Employing a 450-nm Lidar System

Cited by 20 publications

References 31 publications

Integration of Aerobiological Information for Construction Engineering Based on LiDAR and BIM

Integration of Aerobiological Information for Construction Engineering Based on LiDAR and BIM

Design of three-dimensional imaging lidar optical system for large field of view scanning

LED Mini Lidar for Atmospheric Application

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