CN104021673B - Radar tracking technology is utilized to find fast to block up and cause the system and method for reason - Google Patents
Radar tracking technology is utilized to find fast to block up and cause the system and method for reason Download PDFInfo
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Abstract
The radar tracking technology that utilizes of the present invention finds fast to block up and causes the system and method for reason, carries out Continuous Tracking, accurately can obtain the status information of the vehicle in bridge, tunnel by radar tracking technology to vehicle.No matter be on through street or bridge, when getting congestion in tunnel or cause the initiation point of area traffic jamming, can both Timeliness coverage.The present invention moment occurring blocking up and occurring can also be blocked up the moment of causing point and the position that blocks up, block up and cause some positions and be associated together display.And when display is blocked up and caused point on electronic chart, be directly combined with image information, can be very clear to causing the reason of blocking up.During traffic conditions in certain region of playback bridge, tunnel and through street, the moment that the moment that just can occur according to blocking up, the initiation point that blocks up occur and the initiation point picture that blocks up, dynamically show, the person that makes communications policy better can understand the traffic of bridge, tunnel and through street.
Description
Technical field
The present invention relates to technical field of intelligent traffic, specifically a kind of radar tracking technology that utilizes finds fast to block up and causes the system and method for reason.
Background technology
Along with the continuous expansion of city size, transport need increases fast, and road traffic congestion is day by day serious.Over strait, river-spanning bridge is all being built in order to alleviate the many cities of traffic congestion, or wear mountain and build tunnel, the through street in city is all become after these bridge tunnels build up, the magnitude of traffic flow is very large, once there be exception parking not find fast, the traffic that process in time will cause in a section or a regional extent produces large-area blocking up, reduce the traffic capacity of bridge, tunnel, bring very big inconvenience to the trip of people.Improve road efficiency, just must find fast and process to block up, but how accurately to detect that the initiation point that blocks up is the key of dealing with problems in this course.
For this reason, main inventive people submitted to and the patent of authorizing to State Intellectual Property Office on November 17th, 2009, and publication number is: CN101719314A, and denomination of invention is " area traffic jamming triggering point record analysis method ".Cardinal principle is: by be arranged on control center analysis processing computer, be arranged on traffic congestion Rapid Alarm device on city road network and communication line is formed.Analysis processing computer presets a tested measuring point upstream-downstream relationship database, runs to have and cause point analysis program.Often there is traffic congestion region on a large scale, in intersection, the ring road mouth of through street or loop or junction of two streams, or according to actual needs at through street or loop every a segment distance, tested measuring point is set respectively, the Rapid Alarm device that blocks up is installed.After certain tested measuring point gets congestion, what this point was installed block up, and Rapid Alarm device can send jam alarming information to the analysis processing computer of point duty control center fast.
But in technique scheme, still cannot to bridge, each chassis of tunnel carries out omnidistance real-time follow-up problem, simultaneously can not be real-time, find to block up and block up initiation point fast, the moment that can not occur congested link or the moment of causing some appearance of blocking up record in time and show, also the reason of blocking up and causing cannot be learnt, be not easy to the situation that traffic administration person understands the dynamic traffic jamming triggering point in city or region in a period of time, and communications policy person cannot provide administering method targetedly for different congested link, there is provided the accurate foundation of decision-making cannot to communications policy person.
Summary of the invention
Technical matters to be solved by this invention is the initiation point that blocks up that can not find bridge, tunnel in prior art in real time, fast, and blocking up on current through street can not be found in real time, fast, caused by front, or by this some section cause thus provide a kind of radar tracking technology that utilizes to find fast to block up and cause the system and method for reason.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The invention provides a kind of radar tracking technology that utilizes to find fast to block up and cause the system of reason, comprising:
Radar tracking unit, carries out omnidistance Continuous Tracking, the position of each vehicle of Real-time Obtaining and the speed of a motor vehicle to the vehicle travelled;
Block up and cause some judging unit, it comprises:
First judge module, judges that whether the speed of tracked rolling stock is consistent;
Second judge module, when the speed of tracked rolling stock is inconsistent, obtain the First Speed of current location vehicle and the second speed of L rice, front vehicle, judge the difference of second speed and First Speed be whether on the occasion of and be greater than velocity contrast threshold value, if then judge congestion in road and current location as the initiation point that blocks up;
3rd judge module, when tracked rolling stock speed is consistent, for judging that whether the speed of tracked rolling stock is all lower than threshold speed, if then judge congestion in road but be not the initiation point that blocks up;
Some video acquisition unit, omnidistance image acquisition is realized to the runway within the scope of radar tracking, when runway gets congestion initiation point, gather the image information including the current line track of causing dot image that blocks up, described image information is sent to described Surveillance center, and described Surveillance center obtains to cause blocking up according to described image information causes the reason of point;
Display unit, is shown the position of causing point that blocks up, the moment of blocking up the appearance of initiation point by electronic chart and is blocked up and cause the image of some region.
Be preset with very first time threshold value in described second judge module, if the difference of second speed and First Speed higher than velocity contrast threshold value and the duration exceed described very first time threshold value, then judge congestion in road and current location as the initiation point that blocks up.
Be preset with the second time threshold in described 3rd judge module, if car speed lower than threshold speed and the duration exceed described second time threshold, then judge be congestion in road point section.
In described 3rd judge module, described threshold speed=speed limit × N, wherein N is coefficient constant, and 0 < N≤0.5;
In described second judge module, described velocity contrast threshold value=A × second speed, wherein A is coefficient constant and 0 < A≤0.5.
In described second judge module, 0 < L≤20.
The present invention also provides a kind of radar tracking technology that utilizes to find fast to block up the method for the system causing reason, comprises the steps:
S1: adopt radar tracking technology to carry out Continuous Tracking, the position of each vehicle of Real-time Obtaining and the speed of a motor vehicle to the vehicle travelled;
S2: judge according to the speed of a motor vehicle of vehicle within the scope of radar tracking and the speed of a motor vehicle situation of change initiation point that whether road blocks up, it specifically comprises:
S21: judge that whether the speed of tracked rolling stock is consistent, if inconsistent, enter step S22, if consistent, enter step S23;
S22: obtain the First Speed of current location vehicle and the second speed of L rice, front vehicle, judge the difference of second speed and First Speed be whether on the occasion of and be greater than velocity contrast threshold value, if then judge congestion in road and current location enters step S3 after causing point as blocking up, otherwise return step S1;
S23: judge that whether car speed is all lower than threshold speed, if then judge congestion in road but be not block up cause point after enter step S24, otherwise return step S1;
S24: show congested link by electronic chart and block up the moment occurred;
S3: gathering blocks up causes the image of a region, comprises the information of vehicles causing and block up in this image;
S4: by electronic chart display block up cause point position, block up to cause moment that point occurs and block up and cause the image of some region, the Image Acquisition causing some region according to blocking up is blocked up reason.
In described step S22, also comprise the steps:
Setting very first time threshold value, if the difference of second speed and First Speed be on the occasion of and higher than velocity contrast threshold value and the duration exceed described very first time threshold value, then judge congestion in road and current location as the initiation point that blocks up.
In described step S23, also comprise the steps:
Set the second time threshold, if car speed lower than threshold speed and the duration exceed described second time threshold, then judge be congestion in road point section.
In described step S22, described threshold speed=speed limit × N, wherein N is coefficient constant, and 0 < N≤0.5;
In described step S23, described velocity contrast threshold value=A × second speed, wherein A is coefficient constant and 0 < A≤0.5.
In described step S22,0 < L≤20.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) the radar tracking technology that utilizes of the present invention finds fast to block up and causes the system and method for reason, by radar tracking technology, Continuous Tracking is carried out to vehicle, the position of each vehicle of Real-time Obtaining and the speed of a motor vehicle, employing radar tracking technology can not only follow the tracks of the vehicle on through street, also accurately can obtain the status information of the vehicle in bridge, tunnel.To be so no matter on through street or bridge, to get congestion or get congestion in tunnel when causing point, can both Timeliness coverage, thus on electronic chart, directly show the position that blocks up and occur blocking up and cause the position of point.Such scheme in the present invention, can also moment according to system clock, constantly occurring blocking up and occurring the blocked up moment of causing point and the position that blocks up, blocks up and causes some positions and be associated together display.Such scheme of the present invention, when causing point when finding to block up, gathering the image of the initiation point region that blocks up, comprising the information of vehicles causing and block up in this image.When display is blocked up and caused point on electronic chart, be directly combined with image information, can be very clear to causing the reason of blocking up.During traffic conditions in certain region of playback bridge, tunnel and through street of traffic administration person or decision maker, the moment that the moment that just can occur according to blocking up, the initiation point that blocks up occur and the initiation point picture that blocks up, dynamically show, person better can understand bridge, tunnel and Expressway Traffic situation to make communications policy, to which section easily which in moment occur blocking up, easily there is the initiation point that blocks up in which section, and be when occur blocking up cause point, what reason causes block up can be perfectly clear.If seen for a long time, the reason that a certain section gets congestion can be added up, can the difference of different sections of highway reason of blocking up be provided to alleviate targetedly and to be blocked up strategy.
(2) the radar tracking technology that utilizes of the present invention finds fast to block up and causes the system and method for reason, also set very first time threshold value and the second time threshold, when second speed and First Speed difference on the occasion of and higher than velocity contrast threshold value and the duration exceedes the described very first time threshold value time, then judge road as block up and current location as blocking up initiation point; Rolling stock speed lower than threshold speed and the duration exceed described second time threshold, then judge that road to block up and current location is not the initiation point that blocks up.Rate of false alarm can be reduced, the accuracy of further raising system by arranging above-mentioned time threshold.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein,
Fig. 1 utilizes radar tracking technology to find fast to block up and cause the system principle diagram of reason described in one embodiment of the invention;
Fig. 2 utilizes radar tracking technology to find fast to block up and cause the process flow diagram of reason method described in one embodiment of the invention;
Fig. 3 is the schematic diagram of one embodiment of the invention radar tracking unit set-up mode.
Embodiment
embodiment 1
The present embodiment provides a kind of radar tracking technology that utilizes to find fast to block up and cause the system of reason, and as shown in Figure 1, it comprises: radar tracking unit, block up and cause some judging unit, video acquisition unit and a display unit.Wherein:
Described radar tracking unit, carries out omnidistance Continuous Tracking, the position of each vehicle of Real-time Obtaining and the speed of a motor vehicle to the vehicle travelled.
Described blocking up causes some judging unit, and it comprises:
First judge module, judges that whether the speed of tracked rolling stock is consistent.Its medium velocity can be unanimously that the travel speed of rolling stock is roughly equal, and namely the fastest speed and the slowest speed difference also not quite, such as, are all at 50km/ hours.And if there is the vehicle had at 50km/ hours, some vehicles are but at 30km/ hours, at this time car speed has been just inconsistent situation.
Second judge module, when the speed of tracked rolling stock is inconsistent, obtain the First Speed of current location vehicle and the second speed of L rice, front vehicle, judge the difference of second speed and First Speed be whether on the occasion of and be greater than velocity contrast threshold value, if then judge congestion in road and current location as the initiation point that blocks up; Wherein, L rice can be selected according to actual conditions, within generally selecting 20 meters, is preferably 10 meters.Can think that on through street, there is blocking up of a flowing causes some detection zone, the length that detection zone is selected in this initiation of blocking up is L rice.If vehicle is always very low in the speed before this initiation point detection zone that blocks up that enters, and leaves the raising that this speed after causing some detection zone of blocking up has suddenly a higher value, this region is the region causing and block up obviously.
3rd judge module, for judging that whether the speed of tracked rolling stock is all lower than threshold speed, if then judge congestion in road but be not the initiation point that blocks up.
Some described video acquisition module, omnidistance image acquisition is realized to the runway within the scope of radar tracking, when runway gets congestion initiation point, gather the image information including the current line track of causing dot image that blocks up, described image information is sent to described Surveillance center, and described Surveillance center obtains to cause blocking up according to described image information causes the reason of point.
Described display unit, is shown the position of causing point that blocks up, the moment of blocking up the appearance of initiation point by electronic chart and is blocked up and cause the image of some region.
Wherein, described radar tracking unit can for the multiple radar tracking unit on the way arranged, and wherein the monitoring range of the radar tracking unit that the monitoring range of each radar tracking unit is adjacent with it has overlap, as shown in Figure 3.
As shown in Figure 3, some radar tracking unit, setting is arranged at intervals at according to certain distance along vehicle heading, described in each, the radar tracking scope of radar tracking unit contains at least two reference points, and Article 1 reference point within the scope of each radar tracking and the last item reference point are present in adjacent two described radar tracking scopes simultaneously; Radar tracking unit described in each carries out Continuous Tracking to each chassis entered within the scope of its radar tracking, judge that vehicle sails radar tracking scope into when headstock arrives the Article 1 reference point within the scope of radar tracking, judge that when headstock arrives the last item reference point vehicle rolls this radar tracking scope away from.00,01,02,03 4 reference point wherein can be the actual reference point be labeled on radar asorbing paint picture, also can be in radar asorbing paint picture the static reference object such as electric pole, flower bed.And when vehicle to sail under bridge or in tunnel time, reference point herein can also be the starting point of bridge, terminal or the entrance in tunnel, the position corresponding to outlet.Corresponding trackside is provided with three radar tracking unit, and the radar tracking scope of each radar tracking unit is determined with the intersection point of the dotted line of its both sides and road.As can be seen from the figure, reference point 01 is present within the scope of the radar monitoring of first radar tracking unit and second radar tracking unit simultaneously, and reference point 02 is present within the scope of the radar tracking of second radar tracking unit and the 3rd radar tracking unit simultaneously.So, when the headstock of vehicle arrives reference point 01, can judge that radar tracking scope that vehicle has rolled first radar tracking unit away from has sailed the radar tracking scope of second radar tracking unit into simultaneously.When the headstock of vehicle arrives reference point 02, can judge that vehicle has rolled the radar tracking scope of second radar tracking unit away from, sail the radar tracking scope of the 3rd radar tracking unit simultaneously into, realized the Continuous Tracking to vehicle with this.
By radar tracking technology, Continuous Tracking is carried out to vehicle, the position of each vehicle of Real-time Obtaining and the speed of a motor vehicle, like this when a certain car blocks up because accident parking causes subsequent vehicle queuing to cause, just can obtain the position of parking vehicle immediately, also namely block up and cause the position at some place.Instantaneous acquiring blocks up and causes the image information of some region, image information was associated with the moment of causing position and the appearance a little occurred of blocking up, like this when adopt electronic chart check bridge, tunnel and through street traffic time, when ejecting the information of blocking up and causing point, eject image and moment simultaneously.Decision maker can obtain according to image the concrete reason produced that blocks up, and such as vehicle there occurs fault or accident or other unscheduled events etc.Like this, during traffic conditions in certain region of playback bridge, tunnel and through street of traffic administration person or decision maker, the moment that just can occur according to blocking up, the moment of initiation point appearance of blocking up and the image of the initiation point region that blocks up, dynamically show, person better can understand bridge, tunnel and Expressway Traffic situation to make communications policy, to which section easily which in moment occur blocking up, easily there is the initiation point that blocks up in which section, its block up cause point be what reason cause can be perfectly clear.If such as some sections place; except in morning peak and evening peak period; also often can because the scratch accident between vehicle causes blocking up; so just can be judged to be that this section easily occurs traffic hazard, need to strengthen police strength in this section or set up prompting message board to remind driver to note going slowly.Like this by the accumulation of historical data, just the reason that a certain section gets congestion can be added up, the regularity and sudden reason that cause a certain section to block up can be found out, propose Management strategy targetedly.
Because each congested link or the initiation point that blocks up all associate with the moment, if therefore on electronic chart according to generation the moment show congested link or block up cause some time, clearly can recognize which section first there occurs to block up, or the initiation point that blocks up first has appearred in which position, can judge whether influence each other between congested link according to display result.Further, according to display result, the moment easily got congestion in some section can be inferred, can prediction scheme be implemented, before generation of blocking up, carry out traffic dispersion etc., provide accurate foundation can to communications policy person.
In such scheme, owing to adopting radar tracking technology to carry out Continuous Tracking to vehicle, the vehicle on through street can not only be followed the tracks of, also accurately can obtain the status information of the vehicle in bridge, tunnel.So no matter in bridge, tunnel or through street, when causing point when getting congestion or blocking up, can both Timeliness coverage.
In the present embodiment, very first time threshold value is preset with in described second judge module, if the difference of second speed and First Speed on the occasion of and higher than velocity contrast threshold value and the duration exceed described very first time threshold value, then judge congestion in road and current location as the initiation point that blocks up.Correspondingly, in described 3rd judge module, be preset with the second time threshold, if car speed lower than threshold speed and the duration exceed described second time threshold, then judge be congestion in road point section.The setting of described very first time threshold value and described second time threshold can be selected flexibly, and the two also can be equal, generally can select 10 seconds, 15 seconds, 30 seconds etc., preferably do not exceed one minute.Rate of false alarm can be reduced, the accuracy of further raising system by arranging above-mentioned time threshold.
In the present embodiment, in described 3rd judge module, described threshold speed=speed limit × N, wherein N is coefficient constant, and 0 < N≤0.5, be preferably 0.3.Such as, on general through street, speed limit is 100km/ hour, so can think if can think congestion in road when the travel speed of all vehicles in certain section of region is all less than 30km/ hour.If but the speed of all vehicles is all less than threshold speed, can only illustrate that section blocks up, but initiation point can not be described.
In described second judge module, described velocity contrast threshold value=A × second speed, wherein A is coefficient constant and 0 < A≤0.5.A wherein can be chosen as 0.3, and 0.5 etc.If such as vehicle sail into block up cause some detection zone before speed be 30KM/ hour, and vehicle leave block up cause some detection zone after speed be directly promoted to 100KM/ hour, then can think there is the initiation point causing and block up in this region.
embodiment 2
The present embodiment provides a kind of radar tracking technology that utilizes to find fast to block up and cause the method for reason, as shown in Figure 2, comprises the following steps:
S1: adopt radar tracking technology to carry out Continuous Tracking, the position of each vehicle of Real-time Obtaining and the speed of a motor vehicle to the vehicle travelled.
S2: judge according to the speed of a motor vehicle of vehicle within the scope of radar tracking and the speed of a motor vehicle situation of change initiation point that whether road blocks up, it specifically comprises:
S21: judge that whether the speed of tracked rolling stock is consistent, if inconsistent, enter step S22, if consistent, enter step S23.
S22: obtain the First Speed of current location vehicle and the second speed of L rice, front vehicle, judge the difference of second speed and First Speed be whether on the occasion of and be greater than velocity contrast threshold value, if then judge congestion in road and current location enters step S3 after causing point as blocking up, otherwise return step S1.
S23: judge that whether car speed is all lower than threshold speed, if then judge congestion in road but be not block up cause point after enter step S24, otherwise return step S1.
S24: show congested link by electronic chart and block up the moment occurred.
S3: gathering blocks up causes the image of a region, comprises the information of vehicles causing and block up in this image.
S4: by electronic chart display block up cause point position, block up to cause moment that point occurs and block up and cause the image of some region, the Image Acquisition causing some region according to blocking up is blocked up reason.
By radar tracking technology, Continuous Tracking is carried out to vehicle, the position of each vehicle of Real-time Obtaining and the speed of a motor vehicle, like this when a certain car blocks up because accident parking causes subsequent vehicle queuing to cause, just can obtain the position of parking vehicle immediately, also namely block up and cause the position at some place.Instantaneous acquiring blocks up and causes the image information of some region, image information was associated with the moment of causing position and the appearance a little occurred of blocking up, like this when adopt electronic chart check bridge, tunnel and through street traffic time, when ejecting the information of blocking up and causing point, eject image and moment simultaneously.Decision maker can obtain according to image the concrete reason produced that blocks up, and such as vehicle there occurs fault or accident or other unscheduled events etc.Like this, during traffic conditions in the whole bridge of playback, tunnel and certain region, through street of traffic administration person or decision maker, the moment that just can occur according to blocking up, the moment of initiation point appearance of blocking up and the image of the initiation point region that blocks up, dynamically show, person better can understand bridge, tunnel and Expressway Traffic situation to make communications policy, to which section easily which in moment occur blocking up, easily there is the initiation point that blocks up in which section, block up cause point be what reason cause can be perfectly clear.If such as some sections place; except in morning peak and evening peak period; also often can because the scratch accident between vehicle causes blocking up; so just can be judged to be that this section easily occurs traffic hazard, need to strengthen police strength in this section or set up prompting message board to remind driver to note going slowly.Like this by the accumulation of historical data, just the reason that a certain section gets congestion can be added up, the regularity and sudden reason that cause a certain section to block up can be found out, propose Management strategy targetedly.
Because each congested link or the initiation point that blocks up all associate with the moment, if therefore on electronic chart according to generation the moment show congested link or block up cause some time, clearly can recognize which section first there occurs to block up, or the initiation point that blocks up first has appearred in which position, can judge whether influence each other between congested link according to display result.Further, according to display result, the moment easily got congestion in some section can be inferred, can prediction scheme be implemented, before generation of blocking up, carry out traffic dispersion etc., provide accurate foundation can to communications policy person.
In the present embodiment, in described step S22, also comprise the steps: to set very first time threshold value, if the difference of second speed and First Speed be on the occasion of and higher than velocity contrast threshold value and the duration exceed described very first time threshold value, then judge congestion in road and current location as the initiation point that blocks up.In described step S23, also comprise the steps: setting second time threshold, if car speed lower than threshold speed and the duration exceed described second time threshold, then judge be congestion in road point section.The setting of described very first time threshold value and described second time threshold can be selected flexibly, and the two also can be equal, generally can select 10 seconds, 15 seconds, 30 seconds etc., preferably do not exceed one minute.Rate of false alarm can be reduced, the accuracy of further raising system by arranging above-mentioned time threshold.
In the present embodiment, in described step S22, described threshold speed=speed limit × N, wherein N is coefficient constant, and 0 < N≤0.5, be preferably 0.3.Such as, on general through street, speed limit is 100km/ hour, so can think if can think congestion in road when the travel speed of all vehicles in certain section of region is all less than 30km/ hour.If but the speed of all vehicles is all less than threshold speed, can only illustrate that section blocks up, but initiation point can not be described.
In described step S23, described velocity contrast threshold value=A × second speed, wherein A is coefficient constant and 0 < A≤0.5.A wherein can be chosen as 0.3, and 0.5 etc.If such as vehicle sail into block up cause some detection zone before speed be 30KM/ hour, and vehicle leave block up cause some detection zone after speed be directly promoted to 100KM/ hour, then can think there is the initiation point causing and block up in this region.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Claims (10)
1. utilize radar tracking technology to find fast to block up and cause a system for reason, it is characterized in that, comprising:
Radar tracking unit, carries out omnidistance Continuous Tracking, the position of each vehicle of Real-time Obtaining and the speed of a motor vehicle to the vehicle travelled;
Block up and cause some judging unit, it comprises:
First judge module, judges that whether the speed of tracked rolling stock is consistent;
Second judge module, when the speed of tracked rolling stock is inconsistent, obtain the First Speed of current location vehicle and the second speed of L rice, front vehicle, judge the difference of second speed and First Speed be whether on the occasion of and be greater than velocity contrast threshold value, if then judge congestion in road and current location as the initiation point that blocks up;
3rd judge module, when tracked rolling stock speed is consistent, for judging that whether the speed of tracked rolling stock is all lower than threshold speed, if then judge congestion in road but be not the initiation point that blocks up;
Some video acquisition unit, omnidistance image acquisition is realized to the runway within the scope of radar tracking, when runway gets congestion initiation point, gather the image information including the current line track of causing dot image that blocks up, described image information is sent to Surveillance center, and described Surveillance center obtains to cause blocking up according to described image information causes the reason of point;
Display unit, is shown the position of causing point that blocks up, the moment of blocking up the appearance of initiation point by electronic chart and is blocked up and cause the image of some region.
2. the radar tracking technology that utilizes according to claim 1 finds fast to block up and causes the system of reason, it is characterized in that:
Be preset with very first time threshold value in described second judge module, if the difference of second speed and First Speed higher than velocity contrast threshold value and the duration exceed described very first time threshold value, then judge congestion in road and current location as the initiation point that blocks up.
3. the radar tracking technology that utilizes according to claim 1 and 2 finds fast to block up and causes the system of reason, it is characterized in that:
Be preset with the second time threshold in described 3rd judge module, if car speed lower than threshold speed and the duration exceed described second time threshold, then judge be congestion in road point section.
4. the radar tracking technology that utilizes according to claim 3 finds fast to block up and causes the system of reason, it is characterized in that:
In described 3rd judge module, described threshold speed=speed limit × N, wherein N is coefficient constant, and 0 < N≤0.5;
In described second judge module, described velocity contrast threshold value=A × second speed, wherein A is coefficient constant and 0 < A≤0.5.
5. the radar tracking technology that utilizes according to claim 4 finds fast to block up and causes the system of reason, it is characterized in that, in described second judge module, and 0 < L≤20.
6. utilize radar tracking technology to find fast to block up the method for the system causing reason, it is characterized in that, comprise the steps:
S1: adopt radar tracking technology to carry out Continuous Tracking, the position of each vehicle of Real-time Obtaining and the speed of a motor vehicle to the vehicle travelled;
S2: judge according to the speed of a motor vehicle of vehicle within the scope of radar tracking and the speed of a motor vehicle situation of change initiation point that whether road blocks up, it specifically comprises:
S21: judge that whether the speed of tracked rolling stock is consistent, if inconsistent, enter step S22, if consistent, enter step S23;
S22: obtain the First Speed of current location vehicle and the second speed of L rice, front vehicle, judge the difference of second speed and First Speed be whether on the occasion of and be greater than velocity contrast threshold value, if then judge congestion in road and current location enters step S3 after causing point as blocking up, otherwise return step S1;
S23: judge that whether car speed is all lower than threshold speed, if then judge congestion in road but be not block up cause point after enter step S24, otherwise return step S1;
S24: show congested link by electronic chart and block up the moment occurred;
S3: gathering blocks up causes the image of a region, comprises the information of vehicles causing and block up in this image;
S4: by electronic chart display block up cause point position, block up to cause moment that point occurs and block up and cause the image of some region, the Image Acquisition causing some region according to blocking up is blocked up reason.
7. the radar tracking technology that utilizes according to claim 6 finds to block up the method for the system causing reason fast, it is characterized in that, in described step S22, also comprises the steps:
Setting very first time threshold value, if the difference of second speed and First Speed be on the occasion of and higher than velocity contrast threshold value and the duration exceed described very first time threshold value, then judge congestion in road and current location as the initiation point that blocks up.
8. the radar tracking technology that utilizes according to claim 6 or 7 finds to block up the method for the system causing reason fast, it is characterized in that, in described step S23, also comprises the steps:
Set the second time threshold, if car speed lower than threshold speed and the duration exceed described second time threshold, then judge be congestion in road point section.
9. the radar tracking technology that utilizes according to claim 8 finds to block up the method for the system causing reason fast, it is characterized in that:
In described step S22, described velocity contrast threshold value=A × second speed, wherein A is coefficient constant and 0 < A≤0.5;
In described step S23, described threshold speed=speed limit × N, wherein N is coefficient constant, and 0 < N≤0.5.
10. the radar tracking technology that utilizes according to claim 9 finds to block up the method for the system causing reason fast, it is characterized in that, in described step S22, and 0 < L≤20.
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| CN106056908A (en) * | 2016-06-28 | 2016-10-26 | 联想(北京)有限公司 | Information processing method and server |
| CN109532653B (en) | 2018-10-11 | 2020-01-21 | 百度在线网络技术（北京）有限公司 | Method, device, computer equipment and storage medium for communicating with rear vehicle |
| CN109726447A (en) | 2018-12-10 | 2019-05-07 | 北京百度网讯科技有限公司 | Pedestrian's evacuation method, device and storage medium around automatic driving vehicle |
| CN110473396B (en) * | 2019-06-27 | 2020-12-04 | 安徽科力信息产业有限责任公司 | Traffic congestion data analysis method and device, electronic equipment and storage medium |
| CN110491122B (en) * | 2019-07-29 | 2021-03-30 | 安徽科力信息产业有限责任公司 | Method and device for reducing urban congestion ranking |
| CN110515073B (en) * | 2019-08-19 | 2021-09-07 | 南京慧尔视智能科技有限公司 | Multi-radar cross-regional networking multi-target tracking identification method and device |
| CN111599169A (en) * | 2020-04-01 | 2020-08-28 | 广东中科臻恒信息技术有限公司 | Road side unit inspection method, equipment and computer readable storage medium |
| CN112435472A (en) * | 2020-11-12 | 2021-03-02 | 北京嘀嘀无限科技发展有限公司 | Congestion analysis method, device, equipment and storage medium |
| CN115063971B (en) * | 2022-04-29 | 2024-04-05 | 山东金宇信息科技集团有限公司 | Method, equipment and medium for managing and controlling vehicle congestion in tunnel |
| CN114755676B (en) * | 2022-06-16 | 2022-10-04 | 浙江宇视科技有限公司 | Radar vision cooperative target tracking method and system |
| CN115376311A (en) * | 2022-07-08 | 2022-11-22 | 济南瑞源智能城市开发有限公司 | Vehicle situation analysis method and device for tunnel |
| CN116704771B (en) * | 2023-06-21 | 2024-01-12 | 中咨数据有限公司 | Real-time positioning command processing system based on traffic information of congested road section |
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