Rain-sensing wiper improves driving safety

The wiper is directly related to traffic safety. Many owners have had the trouble of adjusting the speed of the wiper over the rainy days - too slow to brush the rain, too fast and affecting the sightlines, which is detrimental to driving safety. With rain-sensing wipers becoming more and more popular, the owner's troubles in the rain can be solved.

Rain-sensing wipers are mainly used in high-end cars and luxury cars. They have become popular in recent years and can be seen in many high-end vehicles with medium-to-high-end or even mid-range cars. Because it can greatly improve the convenience of rain driving, it has been generally welcomed by the owners.

Take the Volkswagen model as an example. The rain sensor is concealed behind the rearview mirror and fixed on the front windshield. It is equipped with an LED forward infrared transmitting and receiving device to determine the amount of rain according to the reflection of infrared rays, and then automatically adjust the frequency of the wiper action. The rain sensor makes stepless adjustments to the wiper's operating speed, which is in complete synchronization with the weather conditions, avoiding the need for the driver to constantly adjust the wiper frequency manually according to the size of the rain. This feature is particularly convenient during rainy summer months. A more “smart” wiper speed ensures safety and minimizes windshield wiper damage to the front windshield.

So, how do you know if a car is equipped with a rain-sensing wiper? In addition to viewing the configuration table, the owner can also look at the junction between the rearview mirror and the windshield. If it is square and has a hole in the middle, it is equipped with a rain sensor.

The principle of the rain sensor is to determine the amount of rain based on the amount of light reflected by a sensor consisting of a light emitting diode and a photodiode, and automatically determine the interval for rain. If the light is good and does not affect the safety of the vehicle, the wiper speed may not increase. Conversely, even if there is a small amount of water on the glass, something will block the light and the sensor wiper will work.

In addition, because the rain sensing system has the characteristics of protecting the wiper arm and wiper, the sensing system will not work under the following conditions: 1. Low temperature wiper suppression: When the ignition coil turns to “ON” for the first time, the vehicle does not move, When the outside temperature is lower than 0°C, the rain sensing system does not work. Second, the neutral wiper suppression: When the ignition coil in the "ON" position, the shift lever in the "N" position, and the vehicle speed is less than 8km / h, the rainfall sensing system does not work.