CN108305491A - A kind of safety-protection system alert processing dynamic route planning system and method - Google Patents
A kind of safety-protection system alert processing dynamic route planning system and method Download PDFInfo
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- CN108305491A CN108305491A CN201711484965.2A CN201711484965A CN108305491A CN 108305491 A CN108305491 A CN 108305491A CN 201711484965 A CN201711484965 A CN 201711484965A CN 108305491 A CN108305491 A CN 108305491A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
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- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
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Abstract
The invention discloses a kind of safety-protection system alert processing dynamic route planning system and method, the wherein normal distribution model of section congestion, to specific section, time information is determined, road section length s, preceding 60 days average speed, the time takes μ=(t1+t2+t3+…+t60)/60;σ2=(t1 2 +t2 2+t3 2+…+t60 2)/60‑μ2, remember that the time X by section, X Normal Distributions are denoted as：X∼N(μ,σ2), obtain specific the formula of probability density function;Find out t0So that P（x<=t0）=0.7, t0As in c d points, the time required to the complete section of motor line;+ 3 σ of μ are the maximum duration needed for the complete section of motor line.The present invention finds alert and point time shortest security protection service station and respective routes occurs, can greatly reduce security protection vehicle to the time of fire scene uncertainty, it can determine the maximum duration needed for the complete section of motor line, ensure that security protection vehicle can reach alert scene, timely processing alert.
Description
Technical field
The present invention relates to the technical fields handled alert in safety-protection system, at a kind of safety-protection system alert
Manage dynamic route planning system and method.
Background technology
Currently, requirement of the people to alert emergency reaction speed is higher and higher, and city especially megapolis is as above
Sea, the congestion of Pekinese inner city are extremely serious.Especially in rush hour, the running time of security protection vehicle is because most probably
Serious and extensive congestion and be unable to control.Processing for alert, existing safety-protection system are some regions in city mostly
Interior setting multiple security protection offices station, away from its nearest security protection work station response, goes to alert spot to dispose when alert occurs
Alert.The previous pass by security protection office station to alert spot, it is all fast according to personal experience by security personnel individual
Speed show that, since the experience of security personnel is different and judges that level of decision-making differs, the treatment effeciency of alert can be by security protection
The individual factor of personnel substantially influences.It occur frequently that fire fighting truck gets lodged in road, the responding time greatly improves several times or even dozens of times
The case where, cause great hidden danger to the security of the lives and property of the common people.
Although also there is the method and system of some roadings recently, all it is static programming or does not consider to gather around
It is stifled, simply look up alert and point nearest security protection office station occur, then find out nearest security protection office station to alert point occurs between most
This shortest path is set to final security protection vehicle traffic route by short path；Even if considering congestion, also simply drawn with congestion or not
Branch condition, and congestion road conditions are simplified, provide unified vehicle pass-through speed.Obviously not reasonable.
Many chance phenomena can be described with normal distribution or approximate description, when observation is enough, great Liang Sui
Machine phenomenon with normal distribution come describe can it is extraordinary embody phenomenon itself pests occurrence rule, make accurate prediction.
Normal distribution（Normal distribution）Also known as Gaussian Profile（Gaussian distribution）, it is one
It is a in all very important probability distribution in the fields such as mathematics, physics and engineering, have great shadow at statistical many aspects
Ring power.If stochastic variable X one mathematic expectaion of obedience is μ, the Gaussian Profile that variance is σ ^2, it is denoted as
X∼N(μ,σ2),
Its probability density function is
The desired value μ of normal distribution determines that its position, standard deviation sigma determine the amplitude of distribution.Because its curve is bell-like, because
This people is often referred to as bell curve again.
The a bit fabulous statistical property of normal distribution
（1）Its density function is symmetrical about mean value,
（2）Its data high concentration is near mean value, P（-σ<x-μ<σ）=68%, namely nearly 70% data distribution is in section（μ-
σ, μ+σ）,
（3）P（-3σ<x-μ<3σ）=99.7%, namely 99.7% data distribution is in section（+ 3 σ of μ -3 σ, μ）, then P（x>μ+3σ）
+P（（x<μ-3σ）=30/00, therefore（+ 3 σ of μ -3 σ, μ）The practical value range of stochastic variable X can be regarded as.This is write in management
3 σ rules of name.
Invention content
The object of the present invention is to provide a kind of safety-protection system alert processing dynamic route planning system and methods, discover and use
Previous traffic data, it is serious mainly for congestion, and security protection center is more, thus the situation that security protection vehicle roadway is less, it fills
Divide the different road speed for providing different congested links using the characteristics of normal distribution, finds alert and the point time occurs most
Short security protection service station and respective routes can greatly reduce security protection vehicle to the uncertainty of the time of fire scene, energy
Enough ensure security protection vehicle each sections of road with not less than 0.7 probability the scheduled time can reach alert scene, and
When handle alert.
To achieve the above object, the present invention uses following technical scheme：
A kind of safety-protection system alert processing dynamic route planing method, including step：Obtain geographical location information and time letter
Breath, finds out the be possible to transit route of security protection service station location to alert spot:Determine the section of each transit route,
Determine the time used in every a road section,Determine that time used in each route, the route for finding out wherein minimum value are final roadway
Line, corresponding security protection service station are the security protection service station for providing rescue;Specially：
（1）Obtain the geographical location information and temporal information of the alert spot corresponding to alarm signal；
（2）According to the geographical location information of the alert spot, the security protection service station in predeterminable area is searched for, acquisition closes on peace
The geographical location information in anti-service station；
（3）According to geographical data bank and the geographical location information of alert spot and security protection service station, security protection service is found out
It stands the be possible to transit route of location to alert spot:Route 1, route 2 ..., route n；
（4）Determine the section of each transit route：Determine the specific section of route 1, the specific section ... of route 2, route n's
Specific section；
（5）Determine time t used in every a road sectionij：Using the normal distribution model of section congestion, calculating is possible to current road
Time used in every a road section of line, tijIndicate that time used in the jth section of route i, i value ranges are 1 ..., n, j value ranges
It is 1 ..., m；
（6）Determine time T used in each route1, T2..., Tn：The sum of time used in each section of each route i is calculated and is：
Ti=ti1+ti2+…+tim；
（7）Take T1, T2..., TnMinimum value Ta, then a routes are target route, namely it is final traffic route to choose a routes, right
The security protection service station answered is the security protection service station for providing rescue.
The determination is per the method for building up of the normal distribution model of the section congestion of time used in a road section：
S01 determines time information：D points, a, b, c, d when e a month b day c, e is determined；
S02 obtains the road section length s by geographical data bank；
The motor vehicle average speed in the d points of sections, obtains one group of 60 number of speed when S03 obtains c during alert occurs first 60 days
According to；
The time required to S04 is obtained the complete section of motor line by t=s/v；
S05 takes μ=(t1+t2+t3+…+t60 )/60;σ2=(t1 2 +t2 2+t3 2+…+t60 2) /60-μ2, remember the time for passing through section
X, X obey a mathematic expectaion be μ, standard variance σ2Normal distribution, be denoted as：
X∼N(μ,σ2),
μ, σ are substituted into the formula of probability density function by S06;
S07 determines t, specially：T is found out by normal distribution database or normal distribution computing module0So that P（x<=t0）=
0.7；t0As in c d points, the required time that the complete section of motor line is estimated.
The geographical location information can be obtained from geographical data bank, and geographical data bank includes road latitude and longitude coordinates
Information, road name, link length, building latitude and longitude coordinates, building title etc., the geographical data bank is according to existing geography
Information is established.
The geographical location information according to the alert spot searches for the security protection service station in predeterminable area, specifically
Including：Centered on the latitude and longitude coordinates of the alert spot, the security protection service station in pre-set radius is searched for；According to searching
Security protection service station, determine the corresponding latitude and longitude coordinates in the security protection service station.
The determination in each section of the transit route, the road name per a road section is single, and includes starting point, does not include
Terminal, the last item section include starting and terminal point.
The initial time of the time information, subsequent section is that the initial time of preceding a road section adds the passage of preceding a road section
Time.
The highway traffic data library includes：Link length, road direction, being averaged per a road section motor vehicle of each moment
Speed.
60 speed datas, respectively alert occur preceding 1 day, 2 days first, above-mentioned c on the preceding 3rd, 4,5 ... 60 when d divide
Motor vehicle average overall travel speed v in the section1, v2..., v60。
The motor vehicle average speed in the section can be obtained by the speed camera in the section described in the section
Moment several vehicle running speeds, then take its average value.
A kind of safety-protection system alert processing dynamic route planning system, including safety protection command system, highway traffic data library,
Geographical data bank, normal distribution computing module, normal distribution database, security protection service station；Wherein normal distribution database can be with
By above-mentioned probability density function and parameter μ, σ2, Probability p provide above-mentioned t0。
The alert handles dynamic route planing method, the maximum value the time required to the complete section of motor line be μ+
3σ。
Occurs for above-mentioned alert with minute the moment as minimum time of day, is to divide 21 seconds 2 pm 01 as the moment occurs for fire behavior
Then it is rounded at 2 points 01 minute.
Advantages of the present invention：
The present invention is based on the normal distribution model of each section congestion, the previous 60 days traffic datas of digging utilization, specific to spy
Timing is carved, and specific road section estimates the transit time in each section with statistical method according to six months previous traffic datas,
And then security personnel are obtained by taken route to the time driven to alert spot, in the case of extreme congestion, single road
The responding time rate of accuracy reached of section is to 70%.
The present invention especially pays attention to selecting at the time of section using the newest transit time data of the preceding a road section calculated in time
Taking realizes Dynamic Programming, therefore the obtained responding time is very accurate and reliable, responding route science.
The security protection service station that this algorithm determines be by the most short determination of responding time, rather than it is previous simply with passive distance most
Short leading determination ensure that the responding time is most short, improve the efficiency of entire safety-protection system.
In addition, data processing method of the present invention is simple and efficient, a common computer can carry out whole fortune of above-mentioned algorithm
Calculation process, cost is extremely low, easy to spread.
Specific implementation mode
Embodiment 1：
For example safety protection command system is in September in 2017 is connected to the alert report Room 801 of Yan'an road 7 for 23 seconds 6 minutes at 5 points in afternoon on the 4th
Fire needs to rescue.
So safety protection command system will be done as follows：
（1）The entitled the Yellow River mansion of building on Yan'an road 7 is transferred according to geographical data bank, latitude and longitude coordinates are（8 ° of east longitude, north
9 ° of latitude）, obtain the geographical location information of alert spot；
（2）With the Yellow River mansion（8 ° of east longitude, 9 ° of north latitude）Centered on, it is assumed that with 5 kilometers for predetermined search radius, in 5 kilometers of search
Security protection service station, obtain the geographical location information and title that close on security protection service station, obtain peace 1 security protection station（10 ° of east longitude,
11 ° of north latitude）, pacify 2 security protection stations（12 ° of east longitude, 13 ° of north latitude）, pacify 3 security protection stations（14 ° of east longitude, 15 ° of north latitude）；
（3）1 security protection station of peace is easy to get by geographical data bank（10 ° of east longitude, 11 ° of north latitude）To the Yellow River mansion（8 ° of east longitude, north latitude
9°）5 different routes, specially route 1, route 2, route 3, route 4, route 5；
（4）Similar finds out 2 security protection stations of peace（12 ° of east longitude, 13 ° of north latitude）To the Yellow River mansion（8 ° of east longitude, 9 ° of north latitude）4 differences
Route, specially route 6, route 7, route 8, route 9；And pacify 3 security protection stations（14 ° of east longitude, 15 ° of north latitude）To the Yellow River mansion（East
Through 8 °, 9 ° of north latitude）3 different routes, specially route 10, route 11, route 12；
(5) we illustrate how to determine the section of route by taking route 1 as an example：Route 1 is made of 3 sections：Yan'an 1
Road, 2 tunnel of Yan'an, 3 tunnel of Yan'an；1 section of Yan'an, 2 section of Yan'an include starting point crossing, and 3 section of Yan'an includes starting point crossing and end
Point crossing, crossings all so all by calculation to and only let it pass primary；
Using the normal distribution model of section congestion, time t used in every a road section of route 1 is calculated1,1, t1,2, t1,3;
(6) with the changed time t in 1 tunnel of the 1st section Yan'an1,1For illustrate how to establish the normal distribution mould of certain a road section congestion
Type, specific method are：
S01 determines alert time of origin at 5 points in the afternoon on the 4th of 23 seconds 6 minutes determining time informations 2017 on the September 4,17 of September in 2017
When 6 divide；
S02 obtains 1 tunnel length s=2 kilometer of section Yan'an by geographical data bank；
S03 is according to highway traffic data library, 66 machine for being segmented 1 tunnels of Yan'an when dividing i.e. September in 2017 3 days 17 when obtaining preceding 1 day 17
Motor-car average speed:6 divide four kinds of vehicle running speeds when obtaining September in 2017 3 days 17 by the speed camera on 1 tunnel of Yan'an,
Respectively：50,42,48,40, take its average value（50+42+48+40）/ 4=45, so v1=45 kilometers/hour；It obtains first 2 days
The motor vehicle average overall travel speed V on 66 pavement branch sections Yan'an, 1 tunnels when dividing i.e. September in 2017 2 days 17 when 172=44 kilometers/hour ...
The motor vehicle average overall travel speed V on 6 pavement branch sections Yan'an, 1 tunnel when obtaining the preceding same day 17 on the 60th60=46 kilometers/hour
The first n days（1=<n<=180）6 divide v kilometers/hour of average overall travel speed when motor vehicle 17
Preceding V on the 1st1=45
Preceding V on the 2nd2=44
. .
. .
Preceding V on the 60th60=46
S04 obtains t by t=s/v1The driving of 6 extension set motor-cars has been gone 1 road of Yan'an and has been taken at=2/45 hour=2.7 minutes, i.e., first 1 day 17
Between, 6 divide t the time required to the complete 1 tunnel section of Yan'an of motor line at first 2 days 172=2.8 minutes, in this way, show that alert occurs preceding 3,
6 divide t the time required to complete 1 tunnel of Yan'an of motor line at 4,5 ..., 60 days 173,t4,…,t60;
ti t1, t2, t3, t4, t5, … ,t30, …, t 60
Time/minute 2.7,2.8,2.9,2.2,2.1 ..., 2 ..., 2.8
S05 is by μ=(t1+t2+t3+…+t60 )/60=(2.7+2.8+2.9+ ...+2.8)/60=2.5,
σ2=(t1 2 +t2 2+t3 2+…+t60 2) /60-μ2=(2.72+2.82 +2.92+ …+2.82)/60-2.52=8.41,
It is X the time required to remembering complete 1 tunnel of Yan'an of motor line, it is μ=2.5, variance σ that X, which obeys a mathematic expectaion,2=8.41 just
State is distributed, i.e. X~N (2.5,8.41)；
S06 substitutes into μ=2.5, σ=2.9
=Obtain specific the formula of probability density function;
S07 is by P（x<= t0）=0.7 seeks t0, specially
Make P（x<= t0）=0.7=
T is calculated by the computing module that this system carries0=4 minutes, t0As 1 tunnel of Yan'an 6 divides motor line is complete to prolong at 17
Pacify the required time that 1 road is estimated, t1,1=4 minutes, the accuracy rate of the estimated time was 70%, that is, motor vehicle was in 4 minutes experts
The probability on 1 tunnel of complete Yan'an is 70%, or says that certainty is 70%.
This example is by probability density function f（x）, u, σ, by corresponding computing module calculates probability because this is known, because
This is not stated carefully.
t1,2,t1,3The same t of algorithm1,1, do not exist together and be only that the moment：
t1,1 6 divide when September in 2017 4 days 17,
T again1,1=4 minutes, so：
t1,2 10 divide when September in 2017 4 days 17,
T is calculated using the normal distribution model of above-mentioned section congestion1,2When, 11 divide when time information takes September in 2017 4 days 17,
And then calculate t1,2=1 minute, then similar
t1,3 11 divide when September in 2017 4 days 17
T is calculated using the normal distribution model of above-mentioned section congestion1,3When, 11 divide when time information takes September in 2017 4 days 17,
And then calculate t1,3=2 minutes；
(7) by the changed time t in 1 tunnel of the 1st section Yan'an1,1=4 minutes, the changed time t in 2 tunnel of the 2nd section of Yan'an1,2=1 minute, the 3rd section
The changed time t in 3 tunnel of Yan'an1,3=2 minutes;
So transit time T of route 11=t1,1+t1,2+t1,3=4+1+2=7 minute are about 7 minutes, i.e. T1=7 minutes.
Because route 1 is made of 3 sections, and the used time that the probability per a road section is 0.7 is respectively 1 point within 4 minutes
Within clock, within 2 minutes, so probability of the used time of whole route no more than 7 minutes is 0.7*0.7*0.7;
Similar, we can calculate route 2 ..., the transit time of route 12, T1, T2..., T12, it is assumed that we obtain one
Group transit time
Ti T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12
Unit/minute 7,15,16,20,37,44,14,15,19,18,14,16
(8) T7=7 is minimum, therefore it is target route to take 1 route, namely it is final traffic route to choose 1 route, corresponding security protection clothes
Business station 1 station of security protection is the security protection service station for providing rescue.
Safety protection command system sends out instruction to 1 station of security protection, provides traffic route 1 to 1 station of security protection and provides suggestion speed
Degree, it is proposed that speed is to calculate the corresponding values of gained time μ, such as 1 road μ=2.5 of this example Yan'an, μ=2/2.5 kilometer v=s//minute=48
Kilometer/hour, so obtain 2 tunnel of Yan'an, 40 kilometers/hour of the suggestion speed on 3 tunnel of Yan'an, 47 kilometers/hour, 1 station of security protection is held
Row instruction, along 1 tunnel of Yan'an with 48 kilometers/hour travel, 2 tunnel of Yan'an with 40 kilometers/hour, 3 tunnel of Yan'an with 47 kilometers/it is small
Shi Sudu is travelled, and fire fighting truck can reach alarm place the Yellow River mansion and sue and labour being connected in alert 7 minutes；In its 7 minutes
The probability of arrival is 0.73The certainty that security protection vehicle reaches in 7 minutes in other words is 0.73；Its used time is more than that 21 minutes probability are
30/00, in other words, it is bound to reach in 21 minutes.It is extremely serious in megalopolis such as Shanghai, Central district's congestion
In the case of, present invention can ensure that the time that security protection vehicle reaches scene in the case of more congestion is still controllable.
If it is desired to adjustment route running time certainty, can accordingly adjust the certainty of the time in each section.
Claims (10)
1. a kind of safety-protection system alert handles dynamic route planing method, including step：Obtain geographical location information and time
Information finds out the be possible to transit route of security protection service station location to alert spot:Determine the road of each transit route
Section determines the time used in every a road section,Determine the time used in each route, the route for finding out wherein minimum value is final driving
Route, corresponding security protection service station are the security protection service station for providing rescue;Specifically ,'：
（1）Obtain the geographical location information and temporal information of the alert spot corresponding to alarm signal；
（2）According to the geographical location information of the alert spot, the security protection service station in predeterminable area is searched for, acquisition closes on peace
The geographical location information in anti-service station；
（3）According to geographical data bank and the geographical location information of alert spot and security protection service station, security protection service is found out
It stands the be possible to transit route of location to alert spot:Route 1, route 2 ..., route n；
（4）Determine the section of each transit route：Determine the specific section of route 1, the specific section ... of route 2, route n's
Specific section；
（5）Determine time t used in every a road sectionij：Using the normal distribution model of section congestion, be possible to transit route is calculated
Every a road section used in the time, tijTime used in the jth section of expression route i, i value ranges are 1 ..., n, and j value ranges are
1,…,m；
（6）Determine time T used in each route1, T2..., Tn：The sum of time used in each section of each route i is calculated and is：Ti
=ti1+ti2+…+tim；
（7）Take T1, T2..., TnMinimum value Ta, then a routes are target route, namely it is final traffic route to choose a routes, corresponding
Security protection service station be the security protection service station that rescue is provided;
It is characterized in that, determine the method for building up of the normal distribution model of the section congestion of time used in every a road section,
To specific section, method is：
S01 determines time information：D points, a, b, c, d when e a month b day c, e is determined；
S02 obtains the road section length s by geographical data bank；
The motor vehicle average speed in the d points of sections, obtains one group of 60 speed data when S03 obtains c during alert occurs first 60 days；
The time required to S04 is obtained the complete section of motor line by t=s/v；
S05 takes μ=(t1+t2+t3+…+t60 )/60;σ2=(t1 2 +t2 2+t3 2+…+t60 2)/ 60-μ2, remember the time X by section,
X obey a mathematic expectaion be μ, standard variance σ2Normal distribution, be denoted as：
X∼N(μ,σ2),
μ, σ are substituted into the formula of probability density function by S06;
S07 determines t, specially：T is found out by normal distribution database or normal distribution computing module0So that P（x<=t0）=
0.7；t0As in c d points, the required time that the complete section of motor line is estimated.
2. alert according to claim 1 handles dynamic route planing method, which is characterized in that the geographical location information
Can be obtained from geographical data bank, geographical data bank include road latitude and longitude coordinates information, road name, link length,
Latitude and longitude coordinates, building title etc. are built, the geographical data bank is established according to existing geography information.
3. alert according to claim 1 handles dynamic route planing method, which is characterized in that occurred according to the alert
The geographical location information on ground is searched for the security protection service station in predeterminable area, is specifically included：With the longitude and latitude of the alert spot
Centered on coordinate, the security protection service station in pre-set radius is searched for；According to the security protection service station searched, the security protection service is determined
It stands corresponding latitude and longitude coordinates.
4. the determination in each section of transit route according to claim 1, which is characterized in that the road name per a road section
It is single, and include starting point, do not include terminal, the last item section includes starting and terminal point.
5. time information according to claim 1, which is characterized in that the initial time of subsequent section is rising for preceding a road section
Moment beginning adds the transit time of preceding a road section.
6. highway traffic data library according to claim 1, which is characterized in that including：Link length, road direction, often
The speed of the various vehicles in one moment road.
7. 60 speed datas according to claim 1, which is characterized in that 60 speed datas are respectively before alert occurs
1 day, 2 days first, above-mentioned c on the preceding 3rd, 4,5 ... 60 when the d points of motor vehicle average overall travel speed v in the section1, v2..., v60。
8. the motor vehicle average speed in the section according to claim 1, which is characterized in that can be by the speed in the section
Camera obtains the moment several vehicle running speeds in the section, then takes its average value.
9. a kind of safety-protection system alert handles dynamic route planning system, which is characterized in that including safety protection command system, road is handed over
Logical database, geographical data bank, normal distribution computing module, normal distribution database, security protection service station；Wherein normal distribution number
It can be by above-mentioned probability density function and parameter μ, σ according to library2, Probability p provide above-mentioned t0。
10. alert according to claim 1 handles dynamic route planing method, which is characterized in that motor line is complete described
Maximum value the time required to section is+3 σ of μ.
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