Rain sensor for automatic systems on vehicles

摘要

Despite the fact that today vehicles are easier to drive and more reliable, the drivers' carefulness is diverted by a largernnumber of factors (road conditions, traffic conditions, phone calls, navigation systems etc.). The automatic system ofrncontrolling the windscreen wipers meets exactly one of the carelessness factors.rnA rain sensor makes the activation of the system of windscreen wipers to become something that you turn on and forgetrnabout it. This completely automated system activated by rain measures the rain intensity and also the necessity to turn onrnthe windscreen wipers and with what velocity.rnUsing an advanced optical system, analogue signal processing and a control algorithm, this technology offers morernsafety and comfort on different weather conditions.rnThe sensor beams an infrared light on the windshield at an angle carefully chosen. If the windshield is dry, the beam isrnreflected back in the sensor. If on the glass there are rain drops, they will reflect the light in different directions (thernwetter the windshield is, the least of the beam ray is reflected back in the sensor).