Adaptive Cruise Control (ACC)

Will Adaptive Cruise Control prevents rear collisions ?

 
Adaptive Cruise Control System

Moving on highways for a long while makes a driver awkward for pressing the speed up pedal continuously to varying the speed as required. You may think that while driving a long distance, everyone feels good. But for driving a vehicle consistently, you may feel distressed. And sometimes we may lose our focusing ability that leads to many frustrations, also tends collisions.

The Cruise Control technique helps to improve those difficulties for the driver who drives on highways frequently. This development consists of a control unit that gets input from the driveshaft, wheel speed sensors, engine's RPM, speedometer cable, and also from brake and clutch using specific transducers, then sends a proper output signal to the solenoid or other control mechanism which have placed near the throttle to induce it, while required. When the driver actuates the cruise control at a particular speed, the control unit receives those data and fixes the throttle position constantly by the solenoid's holding action. Now the car maintains a set speed so the driver can remove the foot from the accelerating pedal. The vehicle can keep up the set speed until the driver employs a brake or clutch. After the vehicle gets slow down ( below the set speed ), the cruise control gets turned off automatically. We need to actuate it if required. It will be able to actuate only around 25 or 30 mph. Despite the improvement of cruise control, some drawbacks are there (i.e.,) When the car in front of us gets slowed, then we need to notice and apply the brake properly, if not it may lead to the rear collision because our car is set to some speed, only by our alertness we can stop our vehicle.

To overcome this concern, this system further improved with some adaptations, which will be named as Adaptive Cruise Control (ACC) system. This system electronically controls the speed of the vehicle as per the driver's input. This ACC includes radar, multi-purpose camera, and the above-mentioned peripherals for maintaining a set speed and other dependence. Radar provides data about the road ahead and also provides the distance between the front vehicle and ours. A multi-purpose camera is to check the driver's lane whether any vehicle is entered into our lane or not.

Now the vehicle is set to some speed so that vehicle maintains a constant speed. While any vehicle is in front of us going at some particular speed, our vehicle detects the distance between both the vehicles and maintains the particular distance. Suppose if the front vehicle gets slow down, the ACC system detects the difference in the distance with the help of radar and camera. So our vehicle warns the driver, if the driver does not respond, then ACC applies brake automatically. After that, the vehicle can obtain the preset speed if the vehicle is slowed around 25 to 30 mph, or else the ACC is deactivated. On traffic-free roads, we can increase the speed of the vehicle just by pressing the raising buttons. This ACC can avoid rear collisions. The vehicle which equips this system is considered as a level 1 autonomous car.

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