2nd ICAI 2022

International Conference on Automotive Industry 2022

Mladá Boleslav, Czech Republic

cruise control reduces the driving speed and adapts it to the car in front, after it turns or accelerates the system gradually increases the driving speed to the default value. Adaptive Cruise Control (ACC) – A radar cruise control that is like conventional cruise control in that it maintains a present vehicle speed. However, unlike current cruise control, this new system can automatically adjust the speed to maintain the correct distance between vehicles in the same lane. If the vehicle decelerates or if another object is detected, the system sends a signal to the engine system and the vehicle starts to brake and decelerate. Then, when the road is clear, the system automatically accelerates the vehicle back to the set speed. The measurement of speed and distance between vehicles is performed using a radar sensor located on the front of the vehicle, which works based on the Doppler effect. This improves driving comfort, especially in low visibility (e.g., in fog). To create an autonomous system for vehicles, it is necessary to ensure correct motion detection and maintain a safe distance between other vehicles in motion (Kalašová et al., 2022). The automatic safety brake is also based on ACC elements, which stop the car without the driver’s reaction if it detects an obstacle on the road. This is one of the basic functions of an autonomous vehicle. This feature has been known since 2008 as Volvo City Safety. The system detects blocking vehicles at low speeds (up to 30 km/h) and brakes the car automatically. The principle of operation of City Safety is shown in Figure 1. The system uses radar to detect vehicles and sends a signal to the brakes when shortening between vehicles, which automatically brakes. At present, the system informs the driver of the threat by means of light and sound signals, while the City Safety activation system illuminates a warning light on the instrument panel indicating the operation of the City Safety system. When looking in the rear-view mirror, the driver does not have to notice the vehicle in front, especially if it is small, because it is in the so-called dead angle. The blind spot monitoring system works based on radar sensors. It was first introduced by BLIS (Blind Spot Information System) by Volvo. The system helps to detect the presence of vehicles in the so-called blind spot (an area around the vehicle which cannot be directly inspected by the driver) and inform the driver of this fact. Cameras installed in the driver’s side mirrors, when the vehicle is in the detected zone by activating a red light on the door pillar to this fact the driver. Radar sensors monitor the space on the sides and behind the car. There are usually two and they are located on the sides of the rear bumper. Blind Spot Assist, also known as Side Assist, works depending on the car’s philosophy at speeds as low as 30km / h. The driver warns the approaching vehicle in a blind spot by flashing the orange icon if he still wants to go to the side lane, the icon colour turns red and an acoustic signal sound. In these cases, active systems intervene in the vehicle’s braking system to prevent or at least reduce the consequences of a collision. Suitable car systems can also recognize the situation at an intersection. The vehicle is equipped with miniature television cameras, which are located on both sides of the front bumper, which capture the image of the traffic situation in front of the vehicle. The information appears on the on-board computer monitor. The system allows you to control the traffic situation if the driver enters an intersection (Kalašová et al., 2022).

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