Antifrost System of Windshield

Takada, Hiroaki

doi:10.4271/890024

Cited by 6 publications

(2 citation statements)

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“…Some might prefer a mechanism that is static as the alternative to wipers, such as a heater. When driving in winter or cold rain, we tend to turn on the heater on the rear window and rear-view mirrors to get rid of the mist or frost to keep a clear view [134]. Hence, a heater can also certainly help keep a sensor emitter or a camera lens clean.…”

Section: Protection and Cleaningmentioning

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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Section: Protection and Cleaningmentioning

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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“…However, public expectations have risen and these systems are often considered to give inadequate results, both with respect to the rate of clearing and to the coverage across the glass surface. Alternative methods incorporating heating elements within the glass are very effective but are expensive and can have a high electrical power requirement [1] [2]. As a consequence, the need for improvements to the design and operation of air based demisting systems remains.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Outlet Geometry on Automotive Demister Performance

Cole¹,

Passmore²,

Rice³

2000

SAE Technical Paper Series

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The established method of clearing a misted car windshield or of maintaining a clear view under misting conditions is through the application of an air supply via jet outlets in the instrument panel. The ability of such arrangements to perform adequately is a function of the prevailing environmental conditions, the vehicle speed, the condition of the demist air source and the geometry and arrangement of the jet outlets. This paper presents experimental data obtained in a purpose built environmental chamber designed to accommodate simple rectangular jets impinging on a misted glass surface. The facility consists of three conditioned air sources applied to a test chamber designed to represent the external, internal and demist air flows. Mist conditions on the glass surface are determined using a novel technique employing a CCD camera acquiring grey scale images which are digitally analysed to generate mist detection, grading and clearing contour data. The test facility and mist analysis techniques are described.Transient jet performance is investigated in a parametric study that addresses the effects of jet aspect ratio, offset, impingement angle and mean volume flow rate on clearing performance. Results are presented in terms of parameters derived from the images recorded during the clearing process. These parameters include rate of clearing terms, breakthrough time and location of clearing centre relative to geometric impingement point.Steady state performance is presented for a number of representative geometries by examining the size of the clear area for a range of interior humidity levels.

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