CN110556014B - Intelligent bus dispatching platform system - Google Patents
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Abstract
The invention discloses an intelligent bus dispatching platform system, which comprises the following modules: the first position module is used for acquiring the current geographic position of a bus line running in the same direction from a starting station to a terminal station at the current time, reading the predicted geographic position of the bus at the current time and the like. The invention has the following effects: the problem that a scheduling scheme is determined to have a large error only by means of an existing single positioning method in a complex communication and electromagnetic environment is solved, so that the positioning speed is increased, the accuracy and the stability of bus scheduling are improved, and the calculation speed is greatly increased by combining station acquisition and mobile acquisition when a standby scheduling scheme is started, so that the optimal scheduling scheme is identified more quickly. And finally, the license plate number is searched through a hash algorithm to position the bus with the problem, and the calculation speed is greatly improved.
Description
Technical Field
The invention belongs to the technical field of big data, and particularly relates to an intelligent bus dispatching platform system.
Background
Along with the development of economy, urban traffic is more and more crowded, especially when meeting the trip peak, because the traffic jam, the bus often can not arrive the station on time, and passenger's latency is longer, brings inconvenience for people's trip, sometimes because the road is too unblocked, the bus speed is too fast again, leads to the car quantity of each interval in the circuit inhomogeneous.
The conventional bus dispatching platform system determines the current operation interval of each bus by acquiring the current geographic position of each bus corresponding to a target route, and carries out dispatching deployment according to the abnormal condition of the bus in each operation interval; or before each bus departure, the dispatching system determines the initial driving path of the bus according to the reserved trip passenger information, and if the dynamic trip demand appears, the dispatching system adjusts the driving path of the bus in time according to the position information and the passenger information of the bus. However, in the prior art, due to the influence of complex communication and electromagnetic environment, the result of positioning and acquiring the geographic position of the bus is easily interfered, for example, the problems of dripping and excellent steps often occur, so that a large error result is generated between the conventional single positioning method and a dispatching system, the positioning speed is slow, the randomness is often strong when a standby dispatching scheme is started, the calculation speed cannot follow the road condition information during real-time dispatching, and the calculation speed of the bus with the positioning problem is slow.
Disclosure of Invention
The invention aims to overcome the defects and provides an intelligent bus dispatching platform system, which comprises the following modules:
the first position module is used for acquiring the current geographical position of a bus running in the same direction between a starting station and a terminal station of a bus line at the current time, and reading the predicted geographical position of the bus at the current time;
the first calculation module is used for calculating a distance difference value c1 between the geographic position of the bus at the current moment and the predicted geographic position of the bus at the current moment;
the second position module is used for acquiring the geographical position of the bus at the next moment and reading the predicted geographical position of the bus at the next moment;
the second calculation module is used for calculating a distance difference value c2 between the geographic position of the bus and the predicted geographic position of the bus at the next moment;
the preset module is used for presetting a deviation threshold value of the same-direction running actual position and the predicted position of the bus on the line;
the output judgment module is used for judging whether the difference between c1 and c2 exceeds the deviation threshold range or not, caching the judgment result, reading the cached result, judging that the deviation of the predicted position is approximate to accuracy when the frequency that the difference between c1 and c2 is located in the deviation threshold range is less than or equal to F, and storing the approximate accurate predicted position result when the circuit operates normally; otherwise, the dispatching control information is sent to the vehicle terminal and the motorcade through the communication module.
The invention has the following effects: the present invention judges whether the difference between c1 and c2 exceeds a deviation threshold range, then judges the line operation condition according to whether the number of times when the difference between c1 and c2 is within the deviation threshold range satisfies a preset number of times, and the like, and first obtains a set W containing approximately accurate predicted positions, according to the number of samples of the approximately accurate predicted positions contained in the set W, the approximately accurate predicted position with the largest number is selected as the target approximately accurate predicted position, the problem that the scheduling scheme is determined to have a huge error only by the existing single positioning method under the complex communication and electromagnetic environment is avoided, therefore, the positioning speed is increased, the accuracy and the stability of bus dispatching are improved, and the stand-by dispatching scheme is started by combining station acquisition and mobile acquisition, so that the calculation speed is greatly increased, and the optimal dispatching scheme is identified more quickly. And finally, the license plate number is searched through a hash algorithm to position the bus with the problem, and the calculation speed is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of an intelligent bus dispatching platform system of the invention.
Fig. 2 is a schematic diagram of a system structure of the output judgment module.
Detailed Description
The invention is further illustrated by the following specific examples:
an intelligent bus dispatching platform system comprises the following modules:
the first position module is used for acquiring the current geographical position of a bus running in the same direction between a starting station and a terminal station of a bus line at the current time, and reading the predicted geographical position of the bus at the current time;
the first calculation module is used for calculating a distance difference value c1 between the geographic position of the bus at the current moment and the predicted geographic position of the bus at the current moment;
the second position module is used for acquiring the geographical position of the bus at the next moment and reading the predicted geographical position of the bus at the next moment;
the second calculation module is used for calculating a distance difference value c2 between the geographic position of the bus and the predicted geographic position of the bus at the next moment;
the preset module is used for presetting a deviation threshold value of the same-direction running actual position and the predicted position of the bus on the line;
the output judgment module is used for judging whether the difference between c1 and c2 exceeds the deviation threshold range or not, caching the judgment result, reading the cached result, judging that the deviation of the predicted position is approximate to accuracy when the frequency that the difference between c1 and c2 is located in the deviation threshold range is less than or equal to F, and storing the approximate accurate predicted position result when the circuit operates normally; otherwise, the dispatching control information is sent to the vehicle terminal and the motorcade through the communication module. And F is 5.
The output judging module comprises a scheduling module for starting a standby scheduling scheme when the number of times that the difference between c1 and c2 is within the deviation threshold range is more than u.
The output judgment module comprises: the first judgment module is used for reading and taking an approximately accurate predicted position after storing an approximately accurate predicted position result; judging whether the number of the approximately accurate predicted positions exceeds a preset value or not, and judging whether the minimum distance between the approximately accurate predicted positions and the predicted positions exceeds a set threshold value or not; when the number of the approximately accurate predicted positions exceeds a preset value or the minimum distance between the approximately accurate predicted positions and the predicted positions exceeds a set threshold value, executing a screening module, and if the two predicted positions do not exceed the preset value, executing a merging module;
the merging module is used for calculating the distance between any two approximately accurate predicted positions, merging the two approximately accurate predicted positions with the minimum distance according to the calculated distance, and then returning to the first judgment module;
the screening module is used for screening out the approximately accurate predicted position meeting one of the two conditions to obtain a set W containing the approximately accurate predicted position;
the predicted position updating module is used for selecting the approximately accurate predicted position with the largest quantity as the approximately accurate predicted position of the target according to the sample quantity of the approximately accurate predicted position contained in the set W; and carrying out weighted average processing on the positions of all samples contained in the target approximately accurate prediction position to obtain the latest prediction position, and updating the prediction position in the original storage medium.
The predicted position updating module comprises a road condition updating module which is used for updating road condition information at a certain time interval after obtaining the latest predicted position and updating the predicted position in the original storage medium.
The dispatching module comprises a preferable module and a standby dispatching module, wherein the preferable module is used for collecting and recording signal values Sj of all buses as u communication nodes when u buses are running in the same direction on one line when a standby dispatching scheme is started, the station signal values Sj form a first set Sjh of the station, a first set Sjh of all stations in the same direction on one line form a total station set, signal values Sd of all buses at the point are recorded at different signal collecting points by using a mobile vehicle-mounted signal collecting device, and the signal values Sd of the signal collecting points form a second set Sdh of the signal collecting points; selecting v buses from u buses as samples (v is less than or equal to u), recording license plate numbers of the v buses, searching v bus signal values corresponding to stations according to the license plate numbers of the v buses in a running line to form a matrix with the size of u x v, wherein u is a column, v is a row, Sj is a row, and Sj is a columnijSignal value indicating that the ith station receives the jth bus; calling a second set Sdh of signal acquisition points, searching v bus signal values corresponding to the signal acquisition points, and storing the v bus signal values in a row vector form, wherein SdiSignal values representing the ith bus, calculating the distance between the second set Sdh and each row in the matrix
Respectively storing 2 Sj and 2 Sd which are sequentially connected into two registers, wherein the initial storage value is 0, storing the result into a third register, storing the result to obtain a first value, and if the first value is a multiple of 2, obtaining the distance d as the first value; otherwise, the first numerical value is discarded, and the sequence is continuously changed into other 2 Sj connected in sequence and 2 Sd connected in sequence to repeat the steps; finding the 2 shortest distance values ds1 and ds2 in the matrix, the signal acquisition point position (X, Y) is calculated by the following formula: x { (X1/ds1) + (X2/ds2) }/{ (1/d1) + (1/d2) }; y { (Y1/ds1) + (Y2/ds2) }/{ (1/d1) + (1/d2) }; wherein (X1, Y1) and (X2, Y2) are two station coordinates, d1 and d2 from above
Calculating to obtain; and calculating the error between the predicted position and the actual position, calculating the average error according to the error, and selecting a standby scheduling scheme with the minimum average error for scheduling.
The optimal selection module comprises a vehicle identification module, and is used for determining Hash (key) according to the mapping relation between the license plate number and the corresponding signal value Sj in the first set Sjh, constructing a Hash table, taking the license plate number as the key value, outputting the signal value Sj corresponding to the license plate number by the Hash (license plate number), sequentially traversing 2 shortest distances ds, and finding out the corresponding license plate number according to the mapping relation between the number of rows where the 2 shortest distances ds are located and the license plate number, wherein the signal value of the row where the shortest distance ds is located is taken as the key value, and outputting the license plate number corresponding to the number of rows where the shortest distance ds is located by the Hash (key).
The scheduling method of the intelligent bus scheduling platform system comprises the following steps:
acquiring the current geographical position of a bus line running in the same direction from a starting station to a terminal station at the current moment;
reading the predicted geographic position of the bus at the current moment;
calculating a distance difference value c1 between the geographic position of the bus at the current moment and the predicted geographic position of the bus at the current moment;
acquiring the geographical position of the bus at the next moment, reading the predicted geographical position of the bus at the next moment, and calculating a distance difference value c2 between the geographical position of the bus and the predicted geographical position of the bus at the next moment;
presetting a deviation threshold value of the same-direction running actual position and the predicted position of the bus on the route;
judging whether the difference between c1 and c2 exceeds the deviation threshold range or not, and caching the judgment result;
reading the cache result, and when the number of times that the difference between c1 and c2 is within the deviation threshold range is less than or equal to F, judging that the deviation of the predicted position is approximately accurate, the circuit operates normally, and simultaneously storing the approximately accurate predicted position result; otherwise, the dispatching control information is sent to the vehicle terminal and the fleet dispatching room through the communication module. The F may be 5.
When the number of times that the difference between c1 and c2 is within the deviation threshold range is greater than u, the backup scheduling scheme is initiated.
After the approximately accurate prediction position result is stored, reading and taking the approximately accurate prediction position; judging whether the number of the approximately accurate predicted positions exceeds a preset value or not, and judging whether the minimum distance between the approximately accurate predicted positions and the predicted positions exceeds a set threshold value or not; when the number of the approximately accurate predicted positions exceeds a preset value or the minimum distance between the approximately accurate predicted positions and the predicted positions exceeds a set threshold value, executing the step S32, and if the two predicted positions do not exceed the preset value, executing the step S31;
step S31: calculating the distance between any two approximately accurate predicted positions, combining the two approximately accurate predicted positions with the minimum distance according to the calculated distance, and then returning to the previous step;
step S32: screening out the approximately accurate predicted position meeting one of the two conditions to obtain a set W containing the approximately accurate predicted position;
selecting the approximately accurate prediction position with the largest quantity as the target approximately accurate prediction position according to the sample quantity of the approximately accurate prediction position contained in the set W; and carrying out weighted average processing on the positions of all samples contained in the target approximately accurate prediction position to obtain the latest prediction position, and updating the prediction position in the original storage medium.
And updating the road condition information at certain time intervals after the latest predicted position is obtained and the predicted position in the original storage medium is updated.
When a standby dispatching scheme is started, u buses are running in the same direction on one line and serve as u communication nodes, signal values Sj of all the buses are collected and recorded at stations, the station signal values Sj form a first set Sjh of the stations, a first set Sjh of all the stations in the same direction on one line form a total station set, and mobile vehicle-mounted signal collection devices are used for collecting signals of different stations on different linesThe signal acquisition points record signal values Sd of the buses at the point, and the signal acquisition point signal values Sd form a second set Sdh of the signal acquisition points; selecting v buses from u buses as samples (v is less than or equal to u), recording license plate numbers of the v buses, searching v bus signal values corresponding to stations according to the license plate numbers of the v buses in a running line to form a matrix with the size of u x v, wherein u is a column, v is a row, Sj is a row, and Sj is a columnijSignal value indicating that the ith station receives the jth bus; calling a second set Sdh of signal acquisition points, searching v bus signal values corresponding to the signal acquisition points, and storing the v bus signal values in a row vector form, wherein SdiSignal values representing the ith bus, calculating the distance between the second set Sdh and each row in the matrix
Respectively storing 2 Sj and 2 Sd which are sequentially connected into two registers, wherein the initial storage value is 0, storing the result into a third register, storing the result to obtain a first value, and if the first value is a multiple of 2, obtaining the distance d as the first value; otherwise, the first numerical value is discarded, and the sequence is continuously changed into other 2 Sj connected in sequence and 2 Sd connected in sequence to repeat the steps; finding the 2 shortest distance values ds1 and ds2 in the matrix, the signal acquisition point position (X, Y) is calculated by the following formula: x { (X1/ds1) + (X2/ds2) }/{ (1/d1) + (1/d2) }; y { (Y1/ds1) + (Y2/ds2) }/{ (1/d1) + (1/d2) }; wherein (X1, Y1) and (X2, Y2) are two station coordinates, and d1 and d2 are represented by the above
Calculating to obtain; and calculating the error between the predicted position and the actual position, calculating the average error according to the error, and selecting a standby scheduling scheme with the minimum average error for scheduling.
Further judging whether the bus speed is too fast, and if so, sending speed reduction information to a bus terminal through a communication module; if the line is too slow due to congestion, the dispatching information is sent to a fleet dispatching room through the communication module to dispatch the prepared vehicle.
Determining Hash (key) according to the mapping relation between the license plate number and the corresponding signal value Sj in the first set Sjh, constructing a Hash table, taking the license plate number as the key value, outputting the signal value Sj corresponding to the license plate number by the Hash (license plate number), sequentially traversing 2 shortest distances ds, and finding out the corresponding license plate number according to the mapping relation between the number of rows where the 2 shortest distances ds are located and the license plate number, wherein the signal value of the row where the shortest distance ds is located is taken as the key value, and outputting the license plate number corresponding to the number of rows where the shortest distance ds is located by the Hash (key).
And selecting a plurality of stations on the bus route, and determining whether the bus is in the same direction or in different directions according to the sequence relation among the stations.
And if the line congestion causes over-slow speed, sending scheduling information to a fleet scheduling room through a communication module, determining the running direction of the bus running in the current abnormal running interval, and scheduling at least one standby bus to run according to the target line from the nearest non-abnormal running interval.
Claims (5)
1. The utility model provides an intelligence public transit dispatch platform system which characterized in that includes following module:
the first position module is used for acquiring the current geographical position of a bus running in the same direction between a starting station and a terminal station of a bus line at the current time, and reading the predicted geographical position of the bus at the current time;
the first calculation module is used for calculating a distance difference value c1 between the geographic position of the bus at the current moment and the predicted geographic position of the bus at the current moment;
the second position module is used for acquiring the geographical position of the bus at the next moment and reading the predicted geographical position of the bus at the next moment;
the second calculation module is used for calculating a distance difference value c2 between the geographic position of the bus and the predicted geographic position of the bus at the next moment;
the preset module is used for presetting a deviation threshold value of the same-direction running actual position and the predicted position of the bus on the line;
an output judgment module for judging whether the difference between c1 and c2 exceedsOutputting a deviation threshold range, caching the judgment result, reading the cached result, judging that the deviation of the predicted position is approximate to be accurate when the number of times that the difference between c1 and c2 is positioned in the deviation threshold range is less than or equal to F, and the line runs normally, and storing the approximate accurate predicted position result; otherwise, the dispatching control information is sent to the vehicle terminal and the motorcade through the communication module; the output judging module comprises a scheduling module used for starting a standby scheduling scheme when the number of times that the difference between c1 and c2 is within the deviation threshold range is more than F; the dispatching module comprises a preferable module and a standby dispatching module, wherein the preferable module is used for collecting and recording signal values Sj of all buses as u communication nodes when u buses are running in the same direction on one line when a standby dispatching scheme is started, the station signal values Sj form a first set Sjh of the station, a first set Sjh of all stations in the same direction on one line form a total station set, signal values Sd of all buses at the point are recorded at different signal collecting points by using a mobile vehicle-mounted signal collecting device, and the signal values Sd of the signal collecting points form a second set Sdh of the signal collecting points; selecting v buses from u buses as samples, wherein v is less than or equal to u, recording license plate numbers of the v buses, searching v bus signal values corresponding to stations according to the license plate numbers of the v buses in a running line to form a matrix with the size of u x v, wherein u is a column, v is a row, Sj is a row, and Sj is a columnijSignal value indicating that the ith station receives the jth bus; calling a second set Sdh of signal acquisition points, searching v bus signal values corresponding to the signal acquisition points, and storing the v bus signal values in a row vector form, wherein SdiSignal values representing the ith bus, calculating the distance between the second set Sdh and each row in the matrix
Wherein SjiSignal values indicating that the ith station receives each bus; respectively storing 2 Sj and 2 Sd which are sequentially connected into two registers, wherein the initial storage value is 0, storing the result into a third register, storing the result to obtain a first value, and if the first value is a multiple of 2, obtaining the distance d as the first value; inverse directionDiscarding the first value, and continuously changing into other 2 Sj connected in sequence and 2 Sd connected in sequence to repeat the steps; finding the 2 shortest distance values ds1 and ds2 in the matrix, the signal acquisition point position (X, Y) is calculated by the following formula: x { (X1/ds1) + (X2/ds2) }/{ (1/d1) + (1/d2) }; y { (Y1/ds1) + (Y2/ds2) }/{ (1/d1) + (1/d2) }; wherein (X1, Y1) and (X2, Y2) are two station coordinates, and d1 and d2 are represented by the above
Calculating to obtain; and calculating the error between the predicted position and the actual position, calculating the average error according to the error, and selecting a standby scheduling scheme with the minimum average error for scheduling.
2. The intelligent bus dispatching platform system as claimed in claim 1, wherein the output judgment module comprises: the first judgment module is used for reading the approximately accurate predicted position after storing the approximately accurate predicted position result; judging whether the number of the approximately accurate predicted positions exceeds a preset value or not, and judging whether the minimum distance between the approximately accurate predicted positions and the predicted positions exceeds a set threshold value or not; when the number of the approximately accurate prediction positions exceeds a preset value or the minimum distance between the approximately accurate prediction positions and the prediction positions exceeds a set threshold value, executing a screening module, and if the two prediction positions do not exceed the preset value, executing a merging module;
the merging module is used for calculating the distance between any two approximately accurate predicted positions, merging the two approximately accurate predicted positions with the minimum distance according to the calculated distance, and then returning to the first judgment module;
the screening module is used for screening out the approximately accurate predicted position meeting one of the two conditions to obtain a set W containing the approximately accurate predicted position;
the predicted position updating module is used for selecting the approximately accurate predicted position with the largest quantity as the approximately accurate predicted position of the target according to the sample quantity of the approximately accurate predicted position contained in the set W; and carrying out weighted average processing on the positions of all samples contained in the target approximately accurate prediction position to obtain the latest prediction position, and updating the prediction position in the original storage medium.
3. The intelligent bus dispatching platform system as claimed in claim 2, wherein: the predicted position updating module comprises a road condition updating module which is used for updating road condition information at a certain time interval after obtaining the latest predicted position and updating the predicted position in the original storage medium.
4. The intelligent bus dispatching platform system as claimed in claim 3, wherein: the optimal selection module comprises a vehicle identification module, and is used for determining Hash (key) according to the mapping relation between the license plate number and the corresponding signal value Sj in the first set Sjh, constructing a Hash table, taking the license plate number as the key value, outputting the signal value Sj corresponding to the license plate number by the Hash (license plate number), sequentially traversing 2 shortest distances ds, and finding out the corresponding license plate number according to the mapping relation between the number of rows where the 2 shortest distances ds are located and the license plate number, wherein the signal value of the row where the shortest distance ds is located is taken as the key value, and outputting the license plate number corresponding to the number of rows where the shortest distance ds is located by the Hash (key).
5. The intelligent bus dispatching platform system as claimed in claim 4, wherein: and F is 5.
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| CN111311116B (en) * | 2020-03-12 | 2024-03-01 | 上海东普信息科技有限公司 | Intelligent park-based vehicle scheduling method, device, equipment and storage medium |
| CN115170006B (en) * | 2022-09-08 | 2022-11-29 | 南方科技大学 | Dispatching method, device, equipment and storage medium |
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