Method for distinguishing static vehicle from object above by millimeter wave radar in severe weather
A millimeter-wave radar, stationary vehicle technology, applied in the field of intelligent transportation, can solve problems such as affecting the driver's operation, increasing the frequency of false triggering of the AEB system, and not being raised.
Pending Publication Date: 2022-04-12
NANJING UNIV OF SCI & TECH
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Such a serious problem will directly affect the working status of the AEB system, and the frequency of false triggering of the AEB system will rise sharply, affecting the driver's operation. figure 1
There is currently no effective solution to the problem that cars cannot identify and distinguish objects above them from stationary vehicles in bad weather
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0033] Below in conjunction with the accompanying drawings in the implementation of this application, this scheme is described in detail;
[0034] Such as Figure 1-5 As shown, a millimeter-wave radar method for distinguishing stationary vehicles from objects above in bad weather,
[0035] The first step: Obtain the RCS value of 120m-80m. RCS is reflected to the radar after the electromagnetic wave hits the object, and the parameters of the reflected wave are measured, and have the following relationship: σ is the radar scattering cross-section value, d is the distance between the radar and the target Distance, σ value and received power P r The power density is related to the transmission power density ρ, which has the following relationship:
[0036] P r =4πd 2 σρ;
[0037] The patent experiment verifies that a vehicle-mounted millimeter-wave radar with a 3dB bandwidth is used. When a car approaches an object, the change trend of the RCS value is used as an effective in...
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 belongs to the field of intelligent transportation, and particularly relates to a method for distinguishing a static vehicle from an object above by a millimeter wave radar in severe weather. Comprising the following steps: step (1), measuring RCS original data in front of a vehicle by using a vehicle-mounted millimeter wave radar; (2) obtaining a real-time slope Si by adopting a linear regression equation and a sliding window algorithm; and (3) the real-time slope Si obtained in the step (2) is accumulated according to the step length of 2-5 m, an accumulated value S is obtained, the vehicle is a static vehicle when the accumulated value S exceeds a set threshold value, and the vehicle is an upper object when the accumulated value S is lower than the set threshold value. The millimeter wave radar is used for calculating the real-time slope accumulated value of the target object, the object above and the static vehicle can be distinguished, and automobile AEB false triggering and passenger safety cannot be caused.
Description
technical field [0001] The invention belongs to the field of intelligent transportation, and in particular relates to a method for distinguishing a stationary vehicle from an object above by a millimeter-wave radar in bad weather. Background technique [0002] In recent years, automotive radar has undergone great development, and its usage rate in automobiles has increased significantly. Accurate and reliable driving environment information is the basis for future ADAS (Advanced Driver Assistance Systems). Therefore, automotive radar sensors have rapidly played a role in the field of environmental perception and recognition. Especially for systems like AEB (automatic braking system), environmental information such as the distance of the vehicle ahead, the speed of the vehicle ahead, and the steering, etc. have a great effect on reducing or avoiding collisions and rear-end collisions. [0003] Although lidar and camera can effectively and accurately identify the surrounding ...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/931G01S7/41
Inventor 皮大伟王帅王洪亮谢伯元王显会王尔烈王霞孙晓旺
Owner NANJING UNIV OF SCI & TECH