KR20120060500A - Smart Cruse Control System - Google Patents

Abstract

PURPOSE: A vehicle automatically steering and constantly driving system is provided to keep the safety distance, the speed, and the lane of a vehicle with respect to a proceeding vehicle by controlling the front wheels and the rear wheels of the vehicle. CONSTITUTION: A vehicle automatically steering and constantly driving system processes data from a camera sensor and a ultrasonic wave sensor based on ATmega128. Data from the ultrasonic wave sensor is transmitted to the ATmega128 to control the speed of a vehicle. Data from the camera sensor is transmitted to a personal computer through wireless LAN and is processed and transmitted to the ATmega128 to control the direction of the wheels of the vehicle. The system controls the front wheels and the rear wheels of the vehicle based on different algorithm.

Description

Auto steering and cruise control system {Smart Cruse Control System}

 The present invention relates to vehicle cruise control and automatic steering, and more particularly, to maintain a safe distance from the preceding vehicle of the vehicle by controlling the front and rear wheels of the vehicle after processing data entered through various sensors using the ATmege128 The present invention relates to a system having a function of maintaining and maintaining lanes.

The existing Smart Cruse Control System can measure the distance to the vehicle ahead using the radar sensor and maintain the safety distance while maintaining the distance to the preceding vehicle. The convenience of not having to pedal for a long time. Existing SCC technology displays the distance to the driver on the screen so that the driver can see, and can drive constant speed and constant speed driving, and thus can improve fuel economy.

We aim to maintain the convenience of the existing Smart Cruse Control System as well as to implement a system with lane keeping capability. The conventional approach is only for cruise control, but we will keep the lanes in line with the system and even cruise, allowing the driver to drive on his or her hands and feet. In addition, because of the fact that there are a lot of cars in the Korean highway situation and low speed driving, SCC can be used not only for high speed driving but also for low speed driving.

The present invention will process data using ATmega128 and receive data information using two sensors, a camera sensor and an ultrasonic sensor. The data received through the ultrasonic wave is sent directly to ATmega128 to control the speed. The data received through the camera sensor is transmitted to the PC through the wireless LAN for image processing, and then sent back to the ATmega128 via the wireless LAN to control the direction of the wheel. Done. The task is to control the front and rear wheels through different algorithms.

Using this technology, it is possible to control the direction as well as to cruise, to secure a safety distance, which is an advantage of the existing Smart Cruse Control System. Therefore, in the past, the pedal should not be released but the handle should be released. The Smart Cruse Control System method allows freedom from both the handle and the pedal. When there is a preceding vehicle, it is possible to improve fuel efficiency by securing a fundus distance according to the speed of the preceding vehicle and by driving a cruise line when there is no preceding vehicle. Further application of this technology will also prevent drowsy driving because there is no need to leave the lane.

To recap, it is expected to be suitable for the realities of Korea's roads, which are becoming more congested during holidays or weekends, as it is possible to drive at low speeds as well as high speeds. In addition, the lane keeping function has been added to prevent accidents caused by drowsy driving on the highway. The use of SCC can improve fuel economy because it maintains constant driving and can reduce unnecessary fuel surplus on hill roads through system control.

We first have two drives. The drive unit controls the speed control part and the direction control part. The speed control part is the rear wheel, and the direction control part is the front wheel. First, let's look at the control of the front wheels.

Control of the rear wheels receives data through the ultrasonic sensor. If the distance in front of the car is far enough, the user will run at the desired speed. If the distance from the car in front is closer than the preset distance, the speed will be adjusted to maintain and maintain the safety distance. The basic principle is as follows.

 An ultrasonic sensor is a sensor that calculates a distance using the speed of sound waves by measuring a time when sound waves are reflected by an object and returning. The speed of sound waves varies slightly depending on the temperature, but usually uses a value of about 334 m / s. The ultrasonic distance sensor is used to calculate the distance from the front car to the front car after the ultrasonic wave is sent to meet the front car and the ultrasonic wave returns.

 If the distance is far enough, the user runs at the desired speed, and if the distance to the front of the car is less than the safe distance, the speed is controlled to maintain the safe distance. The algorithm will set the safety distance at the time of congestion and the safety distance at the time of high-speed driving differently, and will secure the safety distance according to the situation through such algorithm. When the distance is measured by the ultrasonic sensor and the data is processed, the wheel is controlled by controlling the motor using the processed data.

In the case of high speed driving, when the preceding vehicle is present, it follows the speed of the preceding vehicle, secures a safety distance, and when there is no preceding vehicle, it runs at the normal speed previously determined. When driving at low speeds, the safety distance is even smaller, and the basic speed is set to zero, and the speed is adjusted by following the vehicle in front of you when the vehicle starts.

Front wheel control receives data through camera sensor

We will use an RF camera module, which will immediately send data from the camera to the PC for image processing on the PC. Because ATmega128 alone is difficult to process image, use PC. The processed image from the PC is sent to the ATmega128 to control the rear wheels.

The image processing method is as follows. First, the road consists of white lanes on a black background.

The camera sensor draws each line in the center of this white lane and connects them into a single line. It then calculates the midpoint of both lanes and draws the centerline. The vehicle then moves along its centerline, allowing the vehicle to run and maintain lanes.

Claims (1)

The part that reads the distance of both lanes so that the vehicle can run in the middle of two lanes.
Allowing the driver to steer without having to handle the steering wheel is a distinction from traditional methods. Existing methods are not free from the steering wheel because they have the function of cruise control but no direction control. Therefore, this invention we have developed is different from them.
In addition, the Smart Cruse Control system at the time of congestion is also different from the existing method. The existing Smart Cruse Control system was applicable only to high speed driving, but our Smart Cruse Control system has the advantage of being able to operate at low speed, that is, when it is congested. Part also claims in the claims. At low speeds, the basic speed is zero, and the main patent claim is for a system that allows the front car to move and start following it while maintaining a safe distance and to set the speed to zero when the front car stops again.