During the driving process, due to the obstruction of the car body structure, even the large-size double-curvature rearview mirror can not avoid the blind zone behind the driver's side, which becomes a safety hazard in the parallel driving, and some can be prompted The electronic security assist system for the lateral blind zone has come in handy at this time, and domestic consumers can now use these lateral blind zone alert systems on some models. |
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The Volvo brand has always been known for its high safety. Therefore, the blind spot warning system, abbreviated as BLIS (Blind Spot Information System), has been applied to the XC70, V70 and S60 models since 2005. Since then, all Volvo models have been successively adopted. This system was adopted. The camera at the base of the exterior mirror will monitor the image of a frame-shaped blind zone 3 meters wide and 9.5 meters long. If there is a speed greater than 10 km/h and the speed difference between the vehicle and the vehicle itself is 20-70 A moving object (vehicle or pedestrian) between kilometers/hour enters the blind zone, and the system compares each frame of image. When the system thinks that the target is closer, the warning light on the A-pillar will light up to prevent an accident.
Volvo BLIS system working range diagram
Schematic diagram of the working principle of BLIS system
The blind spot sensor is located at the root of the outer mirror
When there is a vehicle or pedestrian in the blind spot, the system confirms that there is danger, and the BLIS system warning light on the A-pillar will light up.
However, systems like BLIS have their own shortcomings. Because images are captured based on visible light imaging systems, when visibility is extremely poor (such as fog or blizzard), the system will not work, but the BLIS system will also have a corresponding driver. prompt. At the same time, if you confirm safety (or through a very crowded section of the market), you can also manually shut down the BLIS system.
The BLIS system can also be manually turned off
Some models of the domestic Audi A4L, A6L and Q5 are also equipped with a BLIS-like blind zone alert system, which Audi calls a lateral assistance system. If the vehicle has a speed of more than 60 km/h, the Audi Side Assist will intervene. Thanks to the help of the sensor, the Audi lateral auxiliary system can detect the vehicle at the farthest distance of 50 meters from the side. If the line is potentially dangerous, the warning light will be illuminated on the rearview mirror. If the driver still turns the turn signal after the warning light is on, the warning light will increase in brightness and begin to flash. This system is really helpful when driving in the city, reminding you to pay attention to the rear of the vehicle to avoid danger, especially for the safety of novices.
Audi's lateral assist system works similarly to the Volvo BLIS system, but the former has a larger detection range.
In addition to the 2.0TFSI and 2.7TDI models, the Audi A6L uses a lateral assist system for all other models.
Frankly speaking, active safety systems such as blind spot hints or side assists are not technically difficult to implement and do not have too high a cost, but they are very user-friendly safety equipment, from various manufacturers to vehicle safety. The trend of increasing attention is becoming more and more common with today's ESP electronic stability system. It is expected to become popular in the future. The average consumer also has the opportunity to use them and enjoy the real Convenience.
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