As the saying goes, "I often walk by the river, how can I not wet shoes?" Driving outside, accidents are inevitable. The development of the safety system was created to avoid accidents. With the continuous improvement of vehicle safety technology, some manufacturers have begun to introduce a new technology to prevent possible collision problems.
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Security is a topic that vendors can never finish.
As we all know, the safety system is divided into an active safety system and a passive safety system, but the pre-crash safety system is between the two. The general principle of this system is to monitor the state of the vehicle ahead by the front sensor and automatically respond to the moment before the collision. Measures to reduce the danger. Therefore, it has both the preventive effect of the active safety system and the emergency measures of the passive safety system. In addition, the pre-crash safety system is not a stand-alone device, but a collection of numerous safety systems that ESP and seat belts will be applied when necessary.
â—Representative system:
Toyota Pre-CollisionSystem
PCS senses obstacles in front by millimeter wave radar
Toyota's pre-collision safety system is called Pre-CollisionSystem, or PCS for short. It is one of the first brands to equip pre-crash safety systems in production cars. The system was first used on Toyota's Lexus LX and RX models. Its principle is to detect obstacles in front of the head through the millimeter-wave radar hidden in the front of the car to prevent the possibility of frontal collision.
The millimeter wave radar is hidden inside the new crown logo
If the system determines that the possibility of a collision is high, the alarm will sound a reminder to prompt the driver to evade. The brake assist (BA) system will immediately enter the ready state to assist the driver to brake, thus giving the vehicle greater braking force; when the system determines that the collision is about to occur, it will pre-tighten the front and rear driver's seat belt, brake system It will also automatically reduce the speed at the same time.
Mercedes-Benz PRE-SAFE
Mercedes-Benz C-class models have already started using the PRE-SAFE system
The Mercedes-Benz system, which it calls "pre-accident protection", belongs to the first phase of the Mercedes-Benz POE-SAFE (Overall Safety) concept, which divides vehicle safety into three phases: first, active safety The system (PRE-SAFE) reduces the probability of accidents. Secondly, it reduces the damage to the driver in accidents through measures such as high-intensity bodywork. The third stage includes measures such as automatically opening dangerous warning lights after accidents to facilitate rescue work. Smooth development.
The security status judged by the PRE-SAFE system
The PRE-SAFE system is activated within 200 milliseconds once the vehicle is about to collide. The system pre-tightens the seat belt, automatically adjusts the front passenger seat, and closes all windows and sunroofs to prevent foreign objects from colliding into the vehicle.
Volvo: CWAB
Domestic Volvo does not have a CWAB system, only XC60 has
Volvo is known for its safety performance. Of course, such an important safety technology cannot be ignored. The system it invented is called CollisionWarningwithBrakeSupport, which is literally translated into collision warning and automatic braking system. What is embarrassing is that Volvo has just tested the system some time ago, but the result is no effect.
CWAB sensing range
CWAB is similar in principle to the pre-crash safety system introduced earlier. It is worth noting that Volvo has developed a system called CitySafety (city safety) that can automatically brake the vehicle at speeds of up to 30 km/h. Rather than the previous two systems, it only serves as a brake aid.
â—Editor's Comments:
Safety is an eternal topic, not just the three listed above, but other manufacturers are also working hard in this regard. Of course, there are still some problems in the current technology that need to be solved. For example, the radar can only sense metal objects, and the brake braking system is not obvious. I believe that after these problems are solved, the pre-crash security system should be widely used.
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