Road junction driving auxiliary device for motor vehicle

[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] figure 1 It is a schematic diagram of the overall structure of the intersection driving assist device for motor vehicles according to the present invention. Such as figure 1 As shown in the figure, the intersection driving assistance device according to the present invention mainly includes an identification unit 1, a central processing unit 2, a distance measurement unit 3, a speed measurement unit 4, and an early warning prompt unit 5; wherein the identification unit 1, the distance measurement unit 3 and the speed measurement unit 4 They are respectively connected to the central processing unit 2 for signals, and the central processing unit 2 is simultaneously connected to the alarm prompt unit 5 for signals.

[0025] Specifically, the recognition unit 1 collects real-time environmental image information in front of the motor vehicle and performs analysis and recognition, and when it recognizes that there are intersection traffic lights and stop lines ahead, it sends relevant information to the central processing unit 2 and gives it through the central processing unit Command to start the distance measuring unit 3 and the speed measuring unit 4. In order to perform accurate identification of intersection traffic lights and stop lines (or stop lines), in a preferred embodiment of the present invention, the identification unit 1 collects environmental image information through a camera, for example, and compares the collected environmental image information with pre-stored The intersection traffic light image matching model is compared, and the recognition process of the intersection traffic light is executed. In addition, the recognition unit preferably executes the recognition process of the intersection stop line based on hough transform processing. The basic principle of Hough transform is: the image signal is processed by the Hough transform to obtain a preliminary processed image. After the Hough transform, the straight line in the original image will become the bright line in the processed image, and then the bright line corresponding to the filtered Chromaticity analysis is performed on the straight line of the original image to obtain the parking white line that needs to be identified. In this way, various geometric shapes can be identified from the image with higher accuracy and faster processing speed.

[0026] The distance measuring unit 3 and the speed measuring unit 4 are respectively used to sense the real-time speed of the motor vehicle and the distance between the motor vehicle and the stop line of the intersection, and play a role in real-time control of the vehicle driving state during the driving of the motor vehicle, and will measure The data is fed back to the central processing unit. According to the received data and image information, the central processing unit 2 also contains information such as the current green/yellow/red light state of the traffic light and the time when the red light is on next time, which can be calculated and judged. Whether the motor vehicle can pass the intersection safely, and the corresponding voice prompt is given to the driver through the early warning prompt unit 5.

[0027] In a preferred embodiment of the present invention, the distance measuring unit is preferably a laser distance measuring unit, and the number is more than two; they can be respectively arranged on both sides of the rearview mirror of the car, etc., in order to obtain accurate distance measurement result. For example, the speed measurement unit can be a radar speed measurement unit. In another preferred embodiment of the present invention, the central processing unit 2 can classify the calculation results according to the received data and image information and set corresponding safety thresholds and danger thresholds: when the calculation result is higher than the safety threshold, prompt The current driving speed is safe to pass the intersection safely; when the calculation result is between the safety threshold and the dangerous threshold, the current driving speed is notified that the current driving speed is dangerous and it is recommended to slow down; when the settlement result is lower than the dangerous threshold, an alarm is issued and prompts to brake in time .

[0028] In addition, the intersection driving assistance device according to the present invention further includes an image display unit for visually outputting environmental image information and warning prompt information in front of the motor vehicle. The early warning and prompt unit can be selected as sound alarm, light alarm, vibration alarm or a combination of the above types.

[0029] In actual application, the information obtained by the recognition unit, distance measurement unit and speed measurement unit is calculated and processed by the central processing unit to obtain the minimum speed at which the vehicle can pass the intersection within the specified time and whether the current speed is sufficient to pass. Information, which is finally presented to the driver by the early warning prompt unit. Correspondingly, the intersection driving assistance unit according to the present invention can better assist the driver in judging whether the intersection ahead can pass safely, improve driving safety, and eliminate various safety hazards when passing through the intersection; in addition, the driver can easily follow the man-machine section The voice prompts corresponding to the operation, so it can play a better role in reducing the burden on drivers, improving driving safety, and contributing to the smoothness of urban roads.

[0030] Those skilled in the art can easily understand that the above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present invention, All should be included in the protection scope of the present invention.