CN111243316A - Method for judging whether road speed limit value of navigation system needs to be updated in real time - Google Patents

Method for judging whether road speed limit value of navigation system needs to be updated in real time Download PDF

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Publication number
CN111243316A
CN111243316A CN202010129240.7A CN202010129240A CN111243316A CN 111243316 A CN111243316 A CN 111243316A CN 202010129240 A CN202010129240 A CN 202010129240A CN 111243316 A CN111243316 A CN 111243316A
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road
speed limit
vehicle
navigation system
limit value
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CN202010129240.7A
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王畅
苏彦奇
谷梦路
付锐
郭应时
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Changan University
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Changan University
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
    • G08G1/096833—Systems involving transmission of navigation instructions to the vehicle where different aspects are considered when computing the route
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
    • G08G1/096833—Systems involving transmission of navigation instructions to the vehicle where different aspects are considered when computing the route
    • G08G1/096844—Systems involving transmission of navigation instructions to the vehicle where different aspects are considered when computing the route where the complete route is dynamically recomputed based on new data

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  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Navigation (AREA)
  • Traffic Control Systems (AREA)

Abstract

The invention provides a method for judging whether a road speed limit value of a navigation system needs to be updated in real time, which comprises the following steps: firstly, collecting image information on a road, and extracting a road speed limit value on a road variable sign board; then, relative speed information of the vehicle and a vehicle in front of the vehicle in t time is collected, and real-time vehicle speed information of the vehicle in front of the vehicle is obtained according to the relative speed information; then the collected speed information in the time t is subjected to statistical analysis, and whether the vehicles around the self vehicle are in accordance with the new speed limit value v or not is judged according to the statistical analysis resultNewDriving is carried out; if the vehicles around the vehicle are already in accordance with the new speed limit value vNewAnd when the vehicle runs, the navigation system starts to update the speed limit value of the road in real time. The method of the invention can find out whether the road speed limit value in the navigation system is the speed limit value required by the actual road in time, correct the road speed limit value of the navigation system in time, and can improve the reliability of the navigation system and the safety of the road.

Description

Method for judging whether road speed limit value of navigation system needs to be updated in real time
Technical Field
The invention relates to the technical field of navigation systems, in particular to a method for judging whether a road speed limit value of a navigation system needs to be updated in real time.
Background
The navigation system plays an increasingly important role in the current vehicle traveling, and becomes an essential part in the daily life of people. In order to solve the driving safety in severe weather and environment such as heavy fog, rain, snow, ice coverage and the like, the variable speed limiting system can effectively reduce the speed of the vehicle, achieve the effects of less road closure and even no road closure, change the highest speed limiting value of each road section of the highway in due time and control the speed of the vehicle in time, thereby effectively preventing the rear-end collision and the multiple-vehicle collision accidents of the vehicle. With the application of the variable information system in the traffic field, how to correct the road speed limit value of the navigation system in time is an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a method for updating a road speed limit value of a navigation system in real time, which can find whether the road speed limit value in the navigation system is the speed limit value required by an actual road or not in time according to the change of the speed limit value on an expressway, correct the road speed limit value of the navigation system in time and improve the reliability of the navigation system and the safety of the road.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme.
The first technical scheme is as follows:
a method for judging whether a road speed limit value of a navigation system needs to be updated in real time comprises the following steps:
step 1, collecting image information on a road, and extracting a road speed limit value on a road variable sign board;
step 2, collecting relative speed information of the vehicle and a vehicle in front of the vehicle within t time, and acquiring real-time vehicle speed information of the vehicle in front of the vehicle according to the relative speed information;
step 3, carrying out statistical analysis on the vehicle speed information collected in the step 2 within the time t, and judging whether the vehicles around the vehicle are in accordance with the new speed limit value v or not according to the statistical analysis resultNewDriving is carried out;
step 4, if the judgment result in the step 3 is that the vehicle is the own vehicleThe surrounding vehicles have already been in accordance with the new speed limit vNewAnd when the vehicle runs, the navigation system starts to update the speed limit value of the road in real time.
The first technical scheme of the invention has the characteristics and further improvement that:
(1) in step 2, the t time is 10 s.
(2) In step 3, whether the vehicles around the vehicle are in accordance with the new speed limit value v or not is judgedNewThe running is carried out, specifically: if the speed information of N vehicles is acquired within the time t and exceeds the speed v of N/2 vehiclesiSatisfy the requirement of
Figure BDA0002395337670000021
And v isi∈(a1VNew,a2VNew) (i is 1,2,3 …, N), it is determined that the vehicle around the host vehicle is in accordance with the new speed limit vNewDriving is carried out; wherein VOld ageFor speed limit values within the navigation system, vNewAnd the road speed limit value on the road variable sign board is obtained by image recognition.
(3) In step 1, extracting a road speed limit value v on a road variable sign board through an image recognition algorithmNew。
The second technical scheme is as follows:
a judging system for judging whether a road speed limit value of a navigation system needs to be updated in real time is used for implementing the judging method and comprises an image acquisition device, an image processing device, a millimeter wave radar and a data processor, wherein the output end of the image acquisition device is connected with the input end of the image processing device, the output end of the image processing device is connected with the input end of the data processor, the output end of the millimeter wave radar is connected with the input end of the data processor, and the output end of the data processor is connected with the navigation system.
Compared with the prior art, the invention has the beneficial effects that:
the method for judging whether the road speed limit value of the navigation system needs to be updated in real time can judge whether the road speed limit value of the navigation system is accurate in time according to the actual condition of the road, can prompt the navigation system to correct the road speed limit value in time, and has good practical significance for the navigation system to adapt to a new variable speed limit road.
The invention also provides a system for judging whether the road speed limit value of the navigation system needs to be updated in real time, which has low cost and reliable work and is suitable for wide popularization and application.
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The invention is described in further detail below with reference to the figures and specific embodiments.
Fig. 1 is a schematic flow chart of a method for determining whether a road speed limit of a navigation system needs to be updated in real time according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a method for determining whether a road speed limit of a navigation system needs to be updated in real time, including the following steps:
step 1, collecting image information on a road, and extracting a road speed limit value on a road variable sign board;
specifically, after acquiring and acquiring image information on a road, extracting a road speed limit value v on a road variable sign board by a common image recognition algorithmNew。
Step 2, acquiring the real-time speed of the vehicle and the relative speed information of the vehicle and the vehicle in front of the vehicle within t time, and acquiring the real-time speed information of the vehicle in front of the vehicle according to the relative speed information;
in this embodiment, the time t is 10 s. Namely, the real-time speed of the self-vehicle and the relative speed information of the self-vehicle and the vehicle in front of the self-vehicle are collected every 10 s.
Since certain errors exist in image recognition, the speed limit value obtained by image recognition can be corrected by further confirmation. Thus, the next step is performed.
Step 3, carrying out statistical analysis on the vehicle speed information collected in the step 2 within the time t, and judging whether the vehicles around the vehicle are in accordance with the new speed limit value v or not according to the statistical analysis resultNewDriving is carried out;
the method specifically comprises the following steps: if the speed information of N vehicles is acquired within the time t and exceeds the speed v of N/2 vehiclesiSatisfy the requirement of
Figure BDA0002395337670000041
And v isi∈(a1VNew,a2VNew) (i is 1,2,3 …, N), it is determined that the vehicle around the host vehicle is in accordance with the new speed limit vNewDriving is carried out; wherein VOld ageFor speed limit values within the navigation system, vNewAnd the road speed limit value on the road variable sign board is obtained by image recognition.
In the above embodiment, a1Take 0.9, a21.1 is taken. That is, for N vehicles collected within t time, if more than half of the vehicles exceed 10% of the range of the old speed limit value and more than half of the vehicles are within 10% of the range of the new speed limit value recognized by the image, it can be considered that the vehicles around the own vehicle have already been recognized as the new speed limit value vNewThe vehicle runs.
Step 4, if the judgment result in the step 3 is that the vehicles around the self vehicle already accord with the new speed limit value vNewAnd when the vehicle runs, the navigation system starts to update the speed limit value of the road in real time.
When the judgment result in the step 3 is that the vehicles around the vehicle are already in accordance with the new speed limit value vNewWhen the vehicle runs, the speed limit value of the road section is changed, but the road speed limit value prompted by the navigation system is not updated in time, and at the moment, the processing unit of the navigation system is reminded to correct the speed limit value of the road section in the system in time.
The embodiment of the invention further provides a system for judging whether the road speed limit value of the navigation system needs to be updated in real time, which is used for implementing the judging method.
In the above embodiments, the image acquiring device is disposed in a front windshield of the vehicle, and is used for acquiring image information on a road.
In this embodiment, the image acquisition device is a camera, the camera is installed in the middle of the upper edge of the front windshield, and the camera is near the rearview mirror, so that the camera can quickly identify the speed limit information on the road-side variable speed limit board.
In the above embodiment, the image processing device is disposed in the vehicle, and is configured to process the image acquired by the image acquiring device and extract the road speed limit value on the road variable sign board.
In the above embodiment, the millimeter wave radar is provided at the front bumper of the vehicle.
In this embodiment, the millimeter wave radar is an ESR millimeter wave radar, and is capable of detecting a relative speed of a vehicle in front of the vehicle with respect to the vehicle, and the vehicle speed sensor is capable of acquiring a running speed of the vehicle; the real-time speed of the surrounding vehicles can be obtained by integrating the speed of the vehicle and the relative speed of the surrounding vehicles relative to the vehicle.
In the above embodiment, the data processor is disposed inside the vehicle, and is configured to calculate and obtain the real-time speed of the surrounding vehicle according to the relative speed of the vehicle in front of the vehicle with respect to the vehicle and the real-time speed of the vehicle, which are acquired by the millimeter wave radar. The data processor is also used for judging whether the peripheral vehicles of the vehicle are in accordance with the new speed limit value v or not according to the real-time speed of the peripheral vehicles and the preset judgment ruleNewThe vehicle runs. And transmitting the judgment result to a processing unit of the navigation system. And the processing unit of the navigation system updates the speed limit value of the road section in the navigation system according to the received information.
The invention can correct the road speed limit value of the navigation system in real time, has good practical significance for the navigation system to adapt to a new variable speed limit system road, and the camera and the millimeter wave radar used by the invention have lower cost and reliable work and are suitable for wide popularization. The method has important significance for improving the applicability of the navigation system and improving the road operation safety.
Although the present invention has been described in detail in this specification with reference to specific embodiments and illustrative embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. A method for judging whether a road speed limit value of a navigation system needs to be updated in real time is characterized by comprising the following steps:
step 1, collecting image information on a road, and extracting a road speed limit value on a road variable sign board;
step 2, collecting relative speed information of the vehicle and a vehicle in front of the vehicle within t time, and acquiring real-time vehicle speed information of the vehicle in front of the vehicle according to the relative speed information;
step 3, carrying out statistical analysis on the vehicle speed information collected in the step 2 within the time t, and judging whether the vehicles around the vehicle are in accordance with the new speed limit value v or not according to the statistical analysis resultNewDriving is carried out;
step 4, if the judgment result in the step 3 is that the vehicles around the self vehicle already accord with the new speed limit value vNewAnd when the vehicle runs, the navigation system starts to update the speed limit value of the road in real time.
2. The method for determining whether the speed limit of the navigation system road needs to be updated in real time according to claim 1, wherein in the step 2, the time t is 10 s.
3. The navigation system road speed limit of claim 1The method for judging whether the value needs to be updated in real time is characterized in that in the step 3, whether the vehicles around the vehicle are judged according to the new speed limit value vNewThe running is carried out, specifically: if the speed information of N vehicles is acquired within the time t and exceeds the speed v of N/2 vehiclesiSatisfy the requirement of
Figure FDA0002395337660000011
And v isi∈(a1VNew,a2VNew) (i is 1,2,3 …, N), it is determined that the vehicle around the host vehicle is in accordance with the new speed limit vNewDriving is carried out; wherein VOld ageFor speed limit values within the navigation system, vNewAnd the road speed limit value on the road variable sign board is obtained by image recognition.
4. The method for determining whether the speed limit of the navigation system road needs to be updated in real time according to claim 4, wherein a1Take 0.9, a21.1 is taken.
5. The method for determining whether the speed limit of the road of the navigation system needs to be updated in real time as claimed in claim 1, wherein in step 1, the speed limit v of the road on the road variable sign board is extracted by an image recognition algorithmNew。
6. A judging system for judging whether a road speed limit value of a navigation system needs to be updated in real time is used for implementing the judging method of claim 1, and the judging system is characterized by comprising an image acquisition device, an image processing device, a millimeter wave radar and a data processor, wherein the output end of the image acquisition device is connected with the input end of the image processing device, the output end of the image processing device is connected with the input end of the data processor, the output end of the millimeter wave radar is connected with the input end of the data processor, and the output end of the data processor is connected with the navigation system.
7. The system for judging whether the speed limit of the navigation system road needs to be updated in real time according to claim 6, wherein the image acquisition device is arranged in a front windshield of a vehicle and is used for acquiring image information on the road.
8. The system for judging whether the road speed limit of the navigation system needs to be updated in real time according to claim 6, wherein the image processing device is arranged in the vehicle and used for processing the image acquired by the image acquisition device and extracting the road speed limit on the road variable sign board.
9. The system for judging whether the speed limit of the navigation system road needs to be updated in real time according to claim 6, wherein the image acquisition device is a camera.
10. The system for judging whether the speed limit of the navigation system road needs to be updated in real time or not according to claim 6, wherein the millimeter wave radar is arranged at a front bumper of a vehicle.
CN202010129240.7A 2020-02-28 2020-02-28 Method for judging whether road speed limit value of navigation system needs to be updated in real time Pending CN111243316A (en)

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CN111739325A (en) * 2020-06-15 2020-10-02 腾讯科技（深圳）有限公司 Method, apparatus, device and medium for determining abnormal parking probability and navigation control
CN115083037A (en) * 2022-06-08 2022-09-20 阿波罗智联(北京)科技有限公司 Method and device for updating map network data, electronic equipment and vehicle

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CN106023628A (en) * 2016-07-21 2016-10-12 浙江吉利汽车研究院有限公司 Speed-limiting auxiliary system and speed-limiting auxiliary method for vehicle
CN106080599A (en) * 2016-06-29 2016-11-09 浙江合众新能源汽车有限公司 A kind of speed limiting system
US20160355182A1 (en) * 2015-06-03 2016-12-08 Ford Global Technologies, Llc System and method for controlling vehicle components based on camera-obtained image information
CN110823235A (en) * 2018-08-07 2020-02-21 通用汽车环球科技运作有限责任公司 Intelligent vehicle navigation system, method and control logic for deriving road segment speed limit

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US20160355182A1 (en) * 2015-06-03 2016-12-08 Ford Global Technologies, Llc System and method for controlling vehicle components based on camera-obtained image information
CN106080599A (en) * 2016-06-29 2016-11-09 浙江合众新能源汽车有限公司 A kind of speed limiting system
CN106023628A (en) * 2016-07-21 2016-10-12 浙江吉利汽车研究院有限公司 Speed-limiting auxiliary system and speed-limiting auxiliary method for vehicle
CN110823235A (en) * 2018-08-07 2020-02-21 通用汽车环球科技运作有限责任公司 Intelligent vehicle navigation system, method and control logic for deriving road segment speed limit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111739325A (en) * 2020-06-15 2020-10-02 腾讯科技（深圳）有限公司 Method, apparatus, device and medium for determining abnormal parking probability and navigation control
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