Unlock instant, AI-driven research and patent intelligence for your innovation.
Vehicle following time interval updating method and device and vehicle cruise control method and device
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of following time distance and update method, which is applied in the field of vehicle automatic control, can solve problems such as rear-end collision and inaccurate vehicle control, and achieve the effects of reducing impact, improving safety and driving experience
Active Publication Date: 2020-06-12
DFSK MOTOR LTD CHONGQING BRANCH CO
View PDF8 Cites 6 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
In the prior art, the following time distance is usually a preset fixed value, and the driver can input it by himself during specific operations, which makes the setting of the following time distance without considering the road conditions (such as road slope, friction factor) The impact on the effect of following the car, which in turn leads to inaccurate vehicle control and the risk of rear-end collision
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0055] Such as figure 1 As shown, a method for updating the following time is provided, including:
[0056] S1. Obtaining the vehicle speed before the shift, the speed after the shift, the shift distance and the shift position of the first vehicle;
[0057] S2. Calculate the speed change according to the vehicle speed before the speed change, the vehicle speed after the speed change and the speed change distance;
[0058] S3. Calculate the first value according to the variable speed and the variable distance;
[0059] S4. According to the corresponding relationship between the first numerical value and the following time distance, determine the following time distance corresponding to the first numerical value;
[0060] S5. Sending the following time distance to the second vehicle that is about to pass the shift position, so that the second vehicle adjusts the driving speed according to the following time distance.
[0061] In the above method, it should be noted that in st...
Embodiment 2
[0078] Such as figure 2 As shown, this embodiment discloses a device for updating the following time distance based on Embodiment 1, which implements the method for updating the following time distance, including:
[0079] A parameter acquisition module, configured to acquire the vehicle speed before the shift, the speed after the shift, the shift distance and the shift position of the first vehicle;
[0080] A calculation module, configured to calculate a speed change according to the vehicle speed before the shift, the vehicle speed after the shift, and the shift distance, and to calculate a first value according to the speed change and the shift distance;
[0081] A following time distance determination module, configured to determine the following time distance corresponding to the first numerical value according to the corresponding relationship between the first numerical value and the following car data;
[0082] A communication module, configured to send the followin...
Embodiment 3
[0094] Such as image 3 As shown, a vehicle adaptive cruise control method, comprising:
[0096] S2. Receive the following time obtained by the first vehicle;
[0097] S3. When reaching the shifting position corresponding to the following time distance, adjust the driving speed according to the preset following distance and following time distance, and the following time distance is the first calculated by the first vehicle based on the variable speed and the shifting distance A numerical value, which is determined according to the corresponding relationship between the first numerical value and the following time, and the speed change is calculated according to the speed before the speed change, the speed after the speed change, and the speed change distance of the first vehicle.
[0098] It should be noted that, in the above method, the first vehicle refers to other vehicles that have passed...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention discloses a vehicle following time interval updating method and device and a vehicle cruise control method and device. The vehicle following time interval updating method comprises the steps that: vehicle speed before speed changing, vehicle speed after speed changing, speed changing distance and a speed changing position of a first vehicle are obtained; a variable speed is calculated according to the pre-speed-change vehicle speed, the post-speed-change vehicle speed and the speed change distance; a first numerical value is calculated according to the variable speed and the variable speed distance; according to the corresponding relation between the first numerical value and the car following time interval, the car following time interval corresponding to the first numericalvalue is determined; and the vehicle following time interval is sent to the second vehicle about to pass through the speed changing position so that the second vehicle can adjust the driving speed according to the vehicle following time interval. According to the invention, the vehicle following time interval is determined by considering the actual situation of the road surface, vehicle speed adjustment better conforms to the actual running state, the influence of road surface information change on the self-adaptive cruisesystem is reduced, the driving experience of a user is improved, and when the road surface condition is not suitable for the self-adaptive cruisesystem, other vehicle users can be reminded in time to close self-adaptive cruise and change into manual control.
Description
technical field [0001] The invention relates to the technical field of vehicle automatic control, in particular to a method for updating a following time distance, a method and a device for controlling vehicle cruise. Background technique [0002] Adaptive cruise control (ACC) is an intelligent automatic control technology. It is based on the traditional constant speedcruise control combined with safe vehicle distance control, and monitors the driving environment ahead through the environmental information perception module. When the vehicle or the vehicle in front is far away from the safe distance, cruise at a preset speed, and when the vehicle in front is within the monitoring range and the speed of the vehicle in front is lower than the cruising speed, it will automatically follow the vehicle in front with a certain control strategy. Among them, when following the vehicle in front, it mainly adjusts the vehicle speed according to the following time distance under the co...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More