CN-121989678-A - Correction method for jump of speed limit value of ISA (industry standard architecture) of automobile

CN121989678ACN 121989678 ACN121989678 ACN 121989678ACN-121989678-A

Abstract

The invention discloses a correction method for jump of an ISA speed limit value of an automobile, which comprises the steps of collecting a road speed limit signboard through a front-view camera after an ISA function is started, identifying and obtaining a collected speed limit V1, obtaining road speed limit information and map information speed limit V2 corresponding to the current position of the automobile through navigation equipment, judging whether a condition speed limit exists in a corresponding road section according to the road speed limit information, taking the collected speed limit V1 as a corresponding lane speed limit value if the condition speed limit exists in the corresponding road section, and taking the map information speed limit V2 as the corresponding lane speed limit value if the condition speed limit exists in the corresponding road section. The invention can solve the problem of repeated jump of the output of the existing ISA speed limit value and can improve the safety and the intelligence of the running of the automobile.

Inventors

Ye Yanyang
JIANG KE
DING FUQIANG
CHEN LONG
WANG CHONGYANG
WANG QINGSONG
OuYang Keke

Assignees

安徽江淮汽车集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260327

Claims (8)

1. The correction method for the jump of the speed limit value of the ISA of the automobile is characterized by comprising the following steps of: after the ISA function is started, acquiring a road speed limit signboard by a front-view camera, and identifying to obtain an acquisition speed limit V1; Acquiring road speed limit information and map information speed limit V2 corresponding to the current position of the vehicle through navigation equipment; Judging whether a condition speed limit exists in the corresponding road section according to the road speed limit information, if not, taking the collected speed limit V1 as a corresponding lane speed limit value, and if so, taking the map information speed limit V2 as a corresponding lane speed limit value.
2. The method for correcting a jump in speed limit value of ISA of a car according to claim 1, further comprising: When the navigation signal jumps, judging whether the jump difference value of the map information speed limit exceeds a set threshold value, if so, performing delay filtering processing, and re-reading the map information speed limit value of the navigation after processing.
3. The correction method for speed limit value jump of car ISA according to claim 2, further comprising: And if the map information speed limit value of the re-reading navigation jumps back to the map information speed limit V2 corresponding to the navigation signal before the jump occurs, taking the map information speed limit as a corresponding lane speed limit value.
4. The method for modifying a speed limit jump of an ISA of a vehicle according to claim 3, further comprising: And if the map information speed limit value of the navigation is read again and still keeps the map information speed limit jump speed limit V3 corresponding to the navigation signal after jump, taking the map information speed limit jump speed limit V3 as the corresponding lane speed limit value.
5. The method for correcting the jump of the speed limit value of the ISA of a car according to claim 4, wherein the delay filtering process comprises: The navigation signal is subjected to a filtering process for 10S.
6. The method for correcting the jump of the speed limit value of the ISA of the automobile according to claim 5, wherein the set threshold value is 30km/h.
7. The method for modifying a speed limit jump of an ISA of a vehicle according to claim 6, further comprising: when the forward-looking camera collects the road speed-limiting signboard, judging whether the distance between the forward-looking camera and the speed-limiting signboard exceeds the identification effective distance, and if so, taking the map information speed limit V2 as a corresponding lane speed-limiting value.
8. The method for modifying a speed limit jump of an ISA of a vehicle according to claim 7, further comprising: When the forward-looking camera collects road speed limit information, the collected road speed limit signboard is a signboard which is closest to the transverse center of the vehicle and is used as the collected speed limit V1 of the vehicle lane.

Description

Correction method for jump of speed limit value of ISA (industry standard architecture) of automobile Technical Field The invention relates to the technical field of automobile speed limit value control, in particular to a correction method for jump of an automobile ISA speed limit value. Background With the rapid development of intelligent automobile, the active safety function is popularized in commercial vehicles, and the intelligent speed auxiliary system (INTELLIGENT SPEED ASSISTANCE, ISA) is an important active safety technology, and the core function is to help drivers to observe road speed limit and avoid unintentional overspeed. When the ISA function is started, the camera acquires road speed limit information, and the road speed limit information or the rain, snow and fog weather speed limit value can not be identified by the camera due to the existence of condition speed limit of part of road sections, and the interval speed limit value and the time limit road speed limit information are required to be acquired by adopting navigation information. However, the GPS positioning accuracy of the commercial vehicle is not high, and the ISA output speed limit value is wrong after the positioning drift. Therefore, how to solve the problem of repeated jump of the speed limit value caused by drift of part of navigation positioning, and improve the accuracy of the output speed limit value of the ISA has important significance. Disclosure of Invention The invention provides a correction method for the jump of an ISA speed limit value of an automobile, which solves the problem of repeated jump of the output of the prior ISA speed limit value and can improve the safety and the intelligence of the running of the automobile. In order to achieve the above object, the present invention provides the following technical solutions: a correction method for the jump of the speed limit value of an ISA (industry standard architecture) of an automobile comprises the following steps: after the ISA function is started, acquiring a road speed limit signboard by a front-view camera, and identifying to obtain an acquisition speed limit V1; Acquiring road speed limit information and map information speed limit V2 corresponding to the current position of the vehicle through navigation equipment; Judging whether a condition speed limit exists in the corresponding road section according to the road speed limit information, if not, taking the collected speed limit V1 as a corresponding lane speed limit value, and if so, taking the map information speed limit V2 as a corresponding lane speed limit value. Preferably, the method further comprises: When the navigation signal jumps, judging whether the jump difference value of the map information speed limit exceeds a set threshold value, if so, performing delay filtering processing, and re-reading the map information speed limit value of the navigation after processing. Preferably, the method further comprises: And if the map information speed limit value of the re-reading navigation jumps back to the map information speed limit V2 corresponding to the navigation signal before the jump occurs, taking the map information speed limit as a corresponding lane speed limit value. Preferably, the method further comprises: And if the map information speed limit value of the navigation is read again and still keeps the map information speed limit jump speed limit V3 corresponding to the navigation signal after jump, taking the map information speed limit jump speed limit V3 as the corresponding lane speed limit value. Preferably, the delay filtering process includes: The navigation signal is subjected to a filtering process for 10S. Preferably, the set threshold is 30km/h. Preferably, the method further comprises: when the forward-looking camera collects the road speed-limiting signboard, judging whether the distance between the forward-looking camera and the speed-limiting signboard exceeds the identification effective distance, and if so, taking the map information speed limit V2 as a corresponding lane speed-limiting value. Preferably, the method further comprises: When the forward-looking camera collects road speed limit information, the collected road speed limit signboard is a signboard which is closest to the transverse center of the vehicle and is used as the collected speed limit V1 of the vehicle lane. The invention provides a correction method for jump of an ISA speed limit value of an automobile, which comprises the steps of collecting a road speed limit signboard through a front-view camera, identifying and obtaining a collected speed limit V1, obtaining road speed limit information and map information speed limit V2 corresponding to the current position of the automobile through navigation equipment, and judging whether a condition speed limit exists on a corresponding road or not to select the collected speed limit V1 or the map information speed limit V2 as a corresponding lane