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Zerong Li

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Proceedings Article | 18 November 2022 Paper

Total reflection array infrared rain sensor

Zerong Li, Zibo Wu, Jichong Han, Fucheng Guo, Jiajun Xv, Rui Peng, Haibo Liu

Proceedings Volume 12473, 124730J (2022) https://doi.org/10.1117/12.2653557

KEYWORDS: Sensors, Infrared sensors, Infrared radiation, Infrared detectors, Reflection, Optical filters, Signal detection, Light emitting diodes, Control systems, Visual optics

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Achieving safe and comfortable driving is the main target of in-vehicle electronic devices. Infrared rain sensors in vehicles are useful when raining. It works by reflecting harmonious light beams on the windshield. When raindrops land on the windshield, this harmony is disturbed, causing the beam intensity to drop. The system then activates the wipers to operate fully automatically. With the help of the rain sensor, drivers can focus on driving without distraction, thus enjoying a comfortable environment. So far, most of the domestic rain sensors are supplied from abroad, and only a few high-end cars are equipped with rain sensors. In this context, a reliable and inexpensive vehicle-mounted infrared rain sensor has become an urgent need. This paper introduces the basic principle of rain sensors and proposes a simple and reliable detection method. This work is dedicated to analyzing some interference factors that affect the rain sensor work and putting forward a series of solutions. Experiments show that the rain sensor meets the design requirements, and the detection principle and solution are feasible.

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