CN100570663C - Realize method, system and the signal fused device of bus signals priority requisition - Google Patents
Realize method, system and the signal fused device of bus signals priority requisition Download PDFInfo
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- CN100570663C CN100570663C CNB2007101758168A CN200710175816A CN100570663C CN 100570663 C CN100570663 C CN 100570663C CN B2007101758168 A CNB2007101758168 A CN B2007101758168A CN 200710175816 A CN200710175816 A CN 200710175816A CN 100570663 C CN100570663 C CN 100570663C
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Abstract
The invention discloses a kind of method, system and signal fused device of realizing the bus signals priority requisition, between vehicle equipment and teleseme, increase signal acquiring board and signal fused device, by the signal fused device various priority requisition signals are carried out pre-service and weighted, and the signal after will handling is transferred to teleseme; Simultaneously, between signal acquiring board and signal fused device, be provided with up, the downlink transfer form of unified standard, with transmission and the processing that makes things convenient for signal.Employing the present invention can reduce requirement and the intractability to teleseme to greatest extent, improves the processing power and the efficient of bus signals priority requisition, and the reliable, effective of the application signal that guarantees priorities of buses transmitted.
Description
Technical field
The present invention relates to public transit vehicle SIGNALS MANAGEMENT technology, relate in particular to a kind of method, system and signal fused device of realizing the bus signals priority requisition.
Background technology
More and more intensive along with urban population, the urban public transport situation has become the principal element that influences living standards of the people.The public traffic in priority mechanism that proposes is from can be divided into the preferential and signal priority of road in form at present, wherein, road preferentially is meant and is the special-purpose road of public transit vehicle planning, for its preferential enforcement, though this method has improved the right to use of public transit vehicle road to a certain extent, but owing to delimit preferential road at the place, crossing, and preferential road does not constitute the whole network system, can not give play to the effect of anticipation to a great extent, especially the crossing is owing to consider factors such as public vehicles turn to, cause public transit vehicle and public vehicles to mix row together fully, had a strong impact on preferential effect.At this situation, signal priority has been proposed again, signal priority is by intersection traffic signal control, and public transit vehicle is carried out the signal allocation of obliquity, improves the traffic efficiency of public transit vehicle at the crossing.
In the prior art, described signal priority application system is made of vehicle equipment, transmission equipment, fusion device and teleseme, and signal priority mainly can be divided into from implementation procedure: vehicle detection, signal transmission, priority requisition are handled and four processes of signal allocation.Concrete, the signal priority processing procedure comprises:
Steps A, the priority requisition signal is discerned and detected by checkout equipment.
At present, the test format of public transit vehicle priority requisition mainly contains two kinds: a kind of public traffic in priority application that is based on vehicle equipment, this mode can be by pre-buried magnetic test coil, Dedicated Short Range Communications, (DSRC, Dedicated Short Range Communication) and conventional radio frequency identification (RFID, RadioFrequency Identification) etc. multi-form, but all need certain checkout equipment be installed, then testing result be delivered to the teleseme end at the check point trackside; Another kind is based on the wireless application of mobile unit on the public transit vehicle, location and wireless communication ability that this mode relies on vehicle self to have, judge whether to arrive the detection position by vehicle, send limited application signal according to certain mode to teleseme when satisfying condition.
Existing vehicle equipment has multiple, such as: toroid winding sensor detector, microwave detector, infrared light detector, laser detector, ultrasonic detector, video detector, wireless identification detecting device etc.
Step B, after assigned address obtains vehicle ID information, relevant informations such as the direction of vehicle ID and priority requisition, position are sent to the teleseme end, so that make the signal function in time understand the relevant information of vehicle location and application and carry out signal priority and distribute.
After step C, teleseme end obtain the priority requisition signal, the application signal is carried out certain processing, described processing generally is meant the conversion of carrying out the electric or data transmission structure of signal, makes teleseme can receive the signal application.
Step D, teleseme carry out rational signal priority to the priority requisition signal of being received and distribute, to reach certain preferential effect according to predefined priority principle.
The control and optimization logic of teleseme inside is generally depended in the operation of this step, realizes the priority requisition of signal by induction control and time-controlled mode.
There is certain complicacy in actual applications in existing public traffic in priority system, the main performance in the following areas:
1) the teleseme kind is numerous, the signaling interface difference that the unlike signal machine adopts.And not all teleseme all possesses the public traffic in priority ability at present, even if having priority function, the allocation plan of controlled variable also all is not quite similar, and therefore, can not directly receive various priority requisition signals.
2) the vehicle identification means are numerous, and signal is discerned mainly based on vehicle recongnition technique.Because vehicle identification has modes such as magnetic test coil identification, RFID, DSRC, microwave identification at present, at different recognition technologies, the recognition device difference of employing, the signal of identification is also different, therefore, various identification signals can not all directly be transferred to teleseme, need carry out the pre-service of signal.
3) crossing signal priority application complexity.The various vehicles in crossing mix row, and the magnitude of traffic flow is big, may have the priority requisition signal of different directions, and application signal etc. simultaneously also has, turns right.Because multiple application may produce simultaneously, therefore, the possibility that the signal transmission collision takes place is very big.
4) preferential controlled target changes various.The signal controlling at crossing is the optimization problem of a complexity, is not to absolute preferential of public transit vehicle, but will be on the basis of taking all factors into consideration the crossing traffic efficiency be certain preferential of public transit vehicle.Generally, public traffic in priority wants comprehensive following factor to consider in implementation procedure: how the public traffic in priority of a plurality of directions in same crossing also distributes limited preferential resource when depositing; For identical public bus network, because the special circumstances at each crossing, the priority processing mode is also incomplete same; How balance public traffic in priority and social traffic, the transport need of the direction of particularly conflicting.
From above-mentioned situation as can be seen, increase day by day along with traffic pressure, existing public traffic in priority system exists significantly not enough: on the one hand, the priority requisition signal is not carried out reasonably pre-service, but directly give teleseme with the priority requisition signal, not only increase the configuration effort of teleseme end greatly, may cause the conflict of teleseme end priority signal under some situation, disturbed the normal operation of teleseme to a certain extent.On the other hand, there is not to set up the priority signal transmission system that satisfies any crossing public traffic in priority demand.Existing public traffic in priority is not taking into full account arbitrariness, the application of multichannel public traffic in priority at crossing and the complex situations of depositing aspect the signal application mechanism, do not set up the complete priority requisition signal description method of a cover, do not solve the problem of a plurality of priority requisition signal conflicts yet, can not satisfy the demand of public traffic in priority under the complex situations.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of method and system that realize the bus signals priority requisition, can reduce requirement and intractability to greatest extent to teleseme, improve the processing power and the efficient of bus signals priority requisition, reliable, the effectively transmission of the application signal that guarantees priorities of buses.
Another object of the present invention is to provide a kind of signal fused device of realizing the bus signals priority requisition, support pre-service and weighted, thereby improve the processing power and the efficient of bus signals priority requisition signal.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of signal fused device is arranged between signal acquiring board and the teleseme, comprises access unit, CPU, isolation level signal output unit, UART digital signal output unit, wherein,
Access unit is used to connect long-range signal acquiring board, receives the priority requisition signal that comprises the information of vehicles that collects; CPU, be used for according to pre-configured parameter, comprise weight configuration, sigtnal interval configuration, the setting of reference range D and the setting of pre-service redundancy time parametric t, the application signal is carried out pre-service, in the response time that sets in advance, masking redundancy priority requisition signal; And described pretreated signal is weighted processing, according to different traffic flow directions different weight ratios is set, and sends the application signal to teleseme according to result's control of pre-service and weighted; The isolation level signal output unit links to each other with teleseme, and the priority requisition signal is sent to teleseme; UART digital signal output unit links to each other with teleseme, and the exchanges data between realization and the teleseme is finished signal application function.
Wherein, described access unit comprises UART expanding element and one or more access module.Described access module is based on the access module of RS485 bus mode and/or based on the access module of wireless mode.
A kind of system that realizes the bus signals priority requisition comprises vehicle equipment, signal acquiring board, signal fused device and teleseme, wherein,
Vehicle equipment is used for collection vehicle by information and vehicle ID information; Signal acquiring board is used to obtain the information of vehicles that vehicle equipment detects, and will comprises that the priority requisition signal of the information of vehicles that collects is transferred to the signal fused device by long haul communication; The signal fused device, information of vehicles that the received signal collection plate is sent and priority requisition signal, according to pre-configured parameter, comprise weight configuration, sigtnal interval configuration, the setting of reference range D and the setting of pre-service redundancy time parametric t, according to pre-configured parameter, comprise weight configuration, sigtnal interval configuration, the setting of reference range D and the setting of pre-service redundancy time parametric t, the application signal is carried out pre-service, in the response time that sets in advance, masking redundancy priority requisition signal; And described pretreated signal is weighted processing, according to different traffic flow directions different weight ratios is set; And send the priority requisition signal to described teleseme according to the result after described pre-service and the weighted; Also be used for sending the signal that is used for information synchronization and application feedback information to described signal acquiring board.Teleseme is used for according to the priority requisition signal of receiving signal lamp being implemented phase control.
A kind of method that realizes the bus signals priority requisition may further comprise the steps:
A, collection vehicle information produce the priority requisition that comprises institute's collection vehicle information and check point coded message according to the information of vehicles that collects and send to the signal fused device;
B, signal fused device carry out pre-service to the priority requisition of receiving, and pretreated signal are weighted processing according to pre-configured parameter, will send to teleseme through the priority requisition of weighted; Described pre-service is: in the response time that sets in advance, and the priority requisition signal of masking redundancy; Described pretreated signal is weighted is treated to: different traffic flow directions is provided with different weight ratios;
C, teleseme carry out phase control according to the priority requisition signal of receiving to signal lamp.
Wherein, described in the step B in the response time that sets in advance, the priority requisition signal of masking redundancy, be specially: response time t is set, pick up counting after receiving once application, invalid application is all regarded in the application in time t as, it is not transferred to teleseme; T if also have priority requisition, then receives once application after the time again, is transferred to teleseme, and then restarts timing, repeats above process; If the priority requisition of many different public transit vehicles, then the priority requisition signal of the corresponding number of times of normal transmission;
Perhaps, according to the distance of check point apart from the crossing, form once above priority requisition signal, send to teleseme one by one by time-delay, be specially: establishing check point is S to the distance at crossing, establishes reference range D in the signal fused device, rounds number of times as the priority requisition signal with S/D, send one by one by time-delay then, reference range D can adjust according to concrete road information;
Perhaps, for from the counterparty to the identical priority requisition signal of phase place merge, be specially:
If teleseme does not have enough access interface, when receive south orientation north, north orientation south to, or east orientation west, west east to the priority requisition signal time, if the two-way signaling phase place of described direction is identical, then the signal fused device merges it as one tunnel priority requisition signal, an access interface of a Seize ACK message machine; If teleseme has enough access interface, the signal fused device then generates south orientation north, north orientation south to described direction, or east orientation west, west east to two-way priority requisition signal.
This method further comprises: different traffic flow directions is provided with different weight ratios; Teleseme is specially: when can only receive the conventional level signal, multiply by weight ratio on this direction by pretreated priority requisition number of signals, obtain applying for that signal sends number of times, export corresponding level signal number by the signal fused device then and deliver to teleseme, thereby realize the weight adjustment; When the teleseme receiving digital signals, multiply by weight ratio on this direction by pretreated priority requisition number of signals, obtain applying for that signal sends number of times, repeatedly send by the communication protocol of signal fused device then, thereby realize the weight adjustment according to the teleseme regulation.
The message that described signal acquiring board sends to the signal fused device comprise at least instruction header, classes of instructions, data length, check point coding, data content, vehicle ID, verification and and end mark; The message that described signal fused device sends to signal acquiring board comprises instruction header, classes of instructions, data length, data content, verification and and end mark at least.
The method of realization bus signals priority requisition provided by the present invention, system and signal fused device, between vehicle equipment and teleseme, increase signal acquiring board and signal fused device, by the signal fused device priority requisition signal from various signal recognition method is carried out pre-service and weighted, automatically the final application signal that generates a definite form is transferred to teleseme, so, can not only fully take into account the arbitrariness and the complicacy of crossing traffic, consider the different of public vehicles and public transit vehicle priority weight, finish the reasonable fusion of crossing all directions public traffic in priority application signal, public transit vehicle is carried out rationally preferential; And can not reach the original signal machine is made any change, can realize the function that bus signals is preferential, can adapt to the demand of multiclass teleseme.
In addition, the present invention has realized the access of different vehicle checkout equipment by increasing the signal acquiring board that is connected with vehicle equipment nearby; And, by up-downgoing transmission of messages form unified between signal acquiring board and the signal fused device is provided, with transmission, processing and the control that makes things convenient for signal, so, can avoid the conflict of different application informations, and gather sufficient signal priority decision-making foundation data, improve the processing power and the efficient of bus signals priority requisition, reliable, the effectively transmission of the application signal that guarantees priorities of buses.
Description of drawings
Fig. 1 is the composition structural representation of signal fused device among the present invention;
Fig. 2 realizes the method flow synoptic diagram of bus signals priority requisition for the present invention;
Fig. 3 is that the system of one embodiment of the invention forms structure and applied environment synoptic diagram.
Embodiment
Basic thought of the present invention is: increase signal acquiring board and signal fused device between vehicle equipment and teleseme, by the signal fused device various priority requisition signals are carried out pre-service and weighted, and the signal after will handling is transferred to teleseme; Simultaneously, between signal acquiring board and signal fused device, be provided with up, the downlink transfer form of unified standard, with transmission and the processing that makes things convenient for signal.
Concrete, the signal fused device receives the priority requisition signal from various signal recognition method according to the protocol format of setting; Advanced row major application Signal Pretreatment after obtaining signal is so that the output signal of signal fused device satisfies the demand of various teleseme phase control; Carry out signal weighting after the pre-service and handle, to adapt to the magnitude of traffic flow control at different crossings; Signal through after pre-service and the signal weighting carries out signal imitation, forms the signal that teleseme can receive.
Fig. 1 is the composition structural representation of signal fused device among the present invention, and as shown in Figure 1, the signal fused device is arranged between signal acquiring board and the teleseme, comprises access unit, CPU, isolation level signal output unit, UART digital signal output unit.Wherein, access unit is used to connect long-range signal acquiring board, receives the priority requisition signal that comprises the information of vehicles that collects; Access unit further comprises UART expanding element and an above access module, the UART expanding element is used to realize the access of multichannel UART equipment, access module is used for connecting by RS485 bus and/or the long-range signal acquiring board of wireless mode, receive the application signal, can have one or morely based on the access module of RS485 bus mode, also can have one or more based on the access module of wireless mode.
What adopt in the example that Fig. 1 provides is 4 road extended modes, and a wireless mode access module is arranged, three 485 bus access module, and the access module of every road expansion all supports to connect a plurality of signal acquiring boards under the effect of host-host protocol.CPU is the core of signal fused device, finishes all transmission and fusion treatment, comprises the pre-service and the weighted of signal; And be used to finish the control task that sends the application signal to teleseme.The isolation level signal output unit by simulating the mode of common magnetic test coil, sends to teleseme with the priority requisition signal, owing to have isolation features, can guarantee that teleseme is not subjected to the interference of external device.UART digital signal output unit when teleseme has the digital interface ability, by the exchanges data that UART realizes signal fused device and teleseme, is finished signal application function.
In the signal fused device, need carry out the configuration of different parameters in advance, to finish pre-service and weighted to the priority requisition signal.Required parameter configuration of carrying out comprises: weight configuration, sigtnal interval configuration, the setting of reference range D, the setting of pre-service redundancy time parametric t, wherein,
Weight configuration according between the direction number of priority requisition, the privileged direction and the equilibrium relation between public traffic in priority and the social traffic direction, is provided with the weight of each priority requisition direction, and minimal weight is 1, and the weighted value that priority level is high more is high more;
Sigtnal interval is provided with, and the signal fused device to the final application of teleseme transmission signal the time, sends a plurality of signals, the time interval between per twice if desired after adjusting through pre-service, weight;
Reference range D is provided with, establish apart from crossing situation far away at check point, generally according to concrete condition settings such as the crossing and the speed of a motor vehicle, usually need about 150 meters distance, if when having platform and platform nearer apart from the crossing, strive for maximum distance as far as possible, if the distance at check point and crossing less than D, is not then carried out respective handling;
Pre-service redundancy time parametric t is provided with, and may export repeatedly vehicle identification result's situation at short notice at same car, and the threshold value that needs to set a time can be made as 3 seconds usually to eliminate redundant priority requisition signal.
After signal fused device relative parameters setting finished, the fusion treatment that the signal fused device can be correlated with comprised Signal Pretreatment and the adjustment of application signal weight.Wherein, described Signal Pretreatment comprises: receive the application signal that comprises information of vehicles from each UART interface; Vehicle ID information is compared analysis,, then ignore the information of follow-up same vehicle ID if identical ID is arranged in the time at t; Carry out delay process according to the check point range information, when check point is far away apart from the crossing, calculate the request times that should produce; Produce final priority requisition signal and pass to the weight adjustment member.
In described Signal Pretreatment process, how to calculate the number of times that produces application and generally decide, as long as the principle of generation is to satisfy to think have continuous vehicle to pass through under the conventional sense coil mode according to the setting of teleseme parameter.For example: when the number of vehicles of passing through in the unit interval was n (n＞1), teleseme is thought had continuous vehicle to pass through.Suppose that the distance between check point and the teleseme is D, the speed of a motor vehicle is v, and (D * n)/v application, the mode for adopting conventional analog detection coil input could satisfy the requirement of this direction to signal priority to need to produce 1+ so at least.
In described Signal Pretreatment process, the adjustment of described application signal weight comprises: for pretreated each application signal, be weighted adjustment, the final application signal that produces the certain intervals some is transferred to teleseme.The application number that weight is high more, produce in the unit interval is many more, also can simulate the effect that the more vehicles of this direction pass through more, thereby obtain the higher signal allocation ratio of this direction, reaches the purpose of preferentially passing through.
Because teleseme need be known the priority requisition that public transit vehicle sends when the application signal that receives from the crossing all directions, or the process information of public vehicles; Want accurately to determine the positional information of public transit vehicle simultaneously, correct assurance is arranged, just can carry out the phase control of signal lamp to make things convenient for the teleseme understanding and considerate condition of oral sex of satisfying the need.Therefore, to comprise the positional information of public transit vehicle identifying information, public transit vehicle and the transport condition information of public transit vehicle in the application signal of transmission at least.
For making things convenient for the control of signal, the invention provides up, the downlink transfer form of unified standard, mainly comprise check point coding, data content and vehicle ID in the described transformat, be respectively applied for the identifying information of positional information, vehicle running state information and public transit vehicle that public transit vehicle is provided, be the necessary information of signal controlling, signal controlling is played a decisive role.
The transformat of described unified standard can be used for wired priority signal application, also goes for wireless application.Described transformat comprises uplink form and downlink transfer form, describes in detail respectively below.
So-called uplink is will detect the process of information transmission to signal pusher side signal fused device by signal acquiring board, and the uplink form as shown in Table 1.
| Sequence number | Transmissions field | Take byte |
| 1 | The instruction header | 7 bytes |
| 2 | Classes of instructions | 1 byte |
| 3 | Data length | 1 byte |
| 4 | The check point coding | Variable byte |
| 5 | Data content | 12 bytes |
| 6 | Vehicle ID | 16 bytes |
| 7 | Verification and | 1 byte |
| 8 | End mark | 1 byte |
Table one
Wherein, it is the instruction that packet, signal acquiring board arrive the signal fused device that the instruction header is used to distinguish, or the signal fused device is to the instruction of signal acquiring board.Be generally by the instruction of signal acquiring board, adopt 7 byte lengths, also can carry out the adjustment of other length in actual use for guaranteeing reliability of data transmission to teleseme end signal fusing device.
Classes of instructions comprises priority requisition signal and status poll, when described priority requisition refers to that public transport arrives the crossing soon, and the priority requisition signal that collects by signal acquiring board; Status poll refers to that signal acquiring board regularly to teleseme end control panel transmit status signal, shows this collection plate operate as normal.
Data length comprise from check point be encoded to verification and between the length of all the elements, unit is a byte, application at present can not detect this byte.
Check point is encoded, and shows the position of vehicle detection point.To the intersection, according to the needs of actual conditions, a road can be established one or more check points, and each check point is adopted the mode of coding counterclockwise, can support 256 kinds of situations at most.General road all only needs two check points, and a detection vehicle enters the crossing, and a detection vehicle rolls the crossing away from.Contain the intersection of four roads for standard, only need eight check points to get final product, remaining position gives over to standby in this byte.
Data content is made of apart from crossing distance, car speed and several parts of detection position latitude and longitude coordinates priority requisition direction, check point.Wherein, the priority requisition direction takies 1 byte, is used to show the travel direction of check point vehicle.To different check points place, vehicle heading can be east orientation west, west eastwards, north orientation south, south orientation north, north east, east orientation south etc., the craspedodrome direction promptly can be arranged, also comprise the direction of turning.Be the amount of traffic information of correct reflection road all directions,, the vehicle heading employing at check point place encoded counterclockwise, can support 256 kinds of application situations at most to make things convenient for the signal fused process.Check point takies 2 byte unit for rice apart from the crossing distance, for the trackside checkout equipment, can obtain range information accurately, and this range information is set in the signal acquiring board, sends when uploading data at every turn.Car speed, unit are meter per second, for the onboard wireless application system that relies on the GPS location, or the direct situation of measuring speed of roadside device, with putting into this byte after the velocity information conversion,, use 0xFF to fill this position for the system that does not possess the ability of testing the speed.The detection position latitude and longitude coordinates, the mode of judging vehicle distances crossing distance more flexibly that the onboard wireless application system of locating for dependence GPS is provided, when this part is not effective when filling with 0, for the trackside checkout equipment, do not make in this way, but directly use check point apart from the crossing distance.
Vehicle ID, for the checkout equipment with vehicle ID identification, the ID length needs that the length of 16 bytes can satisfy existing checkout equipment when vehicle detecting system ID curtailment 16 bytes, can use physical length, and other bytes are filled with 0x00.For the equipment that does not possess the ID detectability, this partial content can be made as whole 0xFF, to show differentiation.
Verification and, from the data length to the verification and between all bytes XOR and, whether be used for detecting data has error code to occur in transmission course.
End mark, the end of presentation directives in the concrete use, can not handled this byte yet.
So-called downlink transfer is meant signal pusher side signal fused device to the information that signal acquiring board sends, and mainly comprises information synchronization and application feedback information two big functions, and concrete form as shown in Table 2.
| Sequence number | Transmissions field | Take byte |
| 1 | The instruction header | 7 bytes |
| 2 | Classes of instructions | 1 byte |
| 3 | Data length | 1 byte |
| 4 | Data content | Variable byte, maximum 250 bytes |
| 5 | Verification and | 1 byte |
| 6 | End mark | 1 byte |
Table two
Wherein, the instruction header, being used to distinguish is the instruction that packet, signal acquiring board arrive the signal fused device, or the signal fused device is to the instruction of signal acquiring board.Be of the instruction of signal fused device herein, adopt 7 byte lengths, also can carry out the adjustment of other length in actual use for guaranteeing reliability of data transmission to signal acquiring board.
Classes of instructions, this byte is used to distinguish the classification of downlink command, usual instructions has two kinds: instruct synchronously with information feedback and lock in time aligned instructions, wherein, function synchronous and the information feedback instruction is: the first, pass through the reception of this instruction, can make each signal acquiring board obtain unified time slot alignment information, the anti-collision of time slot A LOHA of using during for follow-up data upload provides the reference time; The second, in data content, carry the vehicle ID information that success is applied in the time period, give the affirmation information of each signal acquiring board with application.Under many circumstances, each signal acquiring board needs the absolute time, at this moment can pass through the downlink command broadcast time information, finishes the absolute time setting to each signal acquiring board, and this instruction possesses the time slot alignment function equally certainly.
Data length is the total length of data content length and verification and part, and unit is a byte.
Data content, byte length is variable, maximum 250 bytes.In the downlink transfer instruction, data content is difference along with the difference of downlink command type.In reaching the information feedback instruction synchronously, data content can be organized as follows:
Apply for successful vehicle ID1
Apply for successful vehicle ID2
Apply for successful vehicle IDn
Generally, ID quantity can not surpass 5, and the representation of ID is consistent with form in the uplink.
In the lock in time aligned instructions, data content is organized as follows:
Year 2 bytes
Month 1 byte
Day 1 byte
The time 1 byte
Divide 1 byte
Second 1 byte
Verification and, from the data length to the verification and between all bytes XOR and, whether be used for detecting data has error code to occur in transmission course.
End mark, the end of presentation directives.
At a plurality of signal acquiring boards in crossing and deposit and have a situation of transmitting information collision, the present invention also adopts the mode of downlink data fixed time broadcast, usually fixed time interval was made as 1 second, and between twice downlink data, divide 10 and upload time slot, each signal acquiring board carries out transmitting time by descending time slot to be aimed at, and utilizes time slot A LOHA to realize anti-information collision processing then.
The influence that so effectively elimination information is collided guarantees that signal acquiring board can in time send to the signal fused device with vehicle ID detection information; Simultaneously, can give application equipment to apply for successful affirmation by downlink data, the signal acquiring board that does not obtain affirmation can continue to upload application information, guarantees the reliability of applying for.
Based on the transmission mode of above-mentioned uplink and downlink transformat and fixed time broadcast, the method that the present invention realizes the bus signals priority requisition may further comprise the steps as shown in Figure 2:
Step 201: vehicle equipment detect vehicle by the time, collection vehicle information, and will comprise the information of vehicles gathered and the priority requisition of check point coded message sends to the signal fused device by signal acquiring board;
Here, described information of vehicles comprises that vehicle passes through information, vehicle ID information, vehicle heading or the like;
Step 202: the signal fused device carries out pre-service to the priority requisition of receiving, and with pretreated signal times with the counterparty of this application institute predetermined weights coefficient that makes progress, will send to teleseme through the priority requisition that weight is handled;
Here, weight coefficient is directly fixed in the signal fused device according to different demands, such as: suppose according to certain crossing of statistics greatlyyer usually, then, pass through probability with the increasing vehicle to from the bigger weight coefficient of the direction setting in east orientation west from the flow in east orientation west; Suppose that certain crossing is important traffic route from the south orientation west, then can give this crossing, pass through probability to strengthen vehicle from the bigger weight coefficient of the direction setting in south orientation west;
Step 203: teleseme carries out phase control to signal lamp, so that the vehicle priority pass of certain direction according to the priority requisition signal of receiving.
In the method shown in Figure 2, most critical exactly the application signal of receiving is carried out pre-service and weighted.Wherein, Signal Pretreatment is at the different situations of each check point public transit vehicle priority requisition, and the priority requisition signal is carried out overall treatment, can effectively prevent the erroneous judgement to the priority requisition signal, also can adapt to the demand of unlike signal machine.
Concrete, because the crossing traffic more complicated, described Signal Pretreatment mainly comprises following several situation:
A. same public transit vehicle is sent repeatedly the situation of priority requisition: when near same public transit vehicle travelling speed check point slower, even when dead state occurring, check point may repeatedly collect the information of same public transport, if directly send the priority requisition signal to teleseme, then teleseme receives repeatedly priority requisition signal in the short period of time, just may think many bus travels by mistake to this crossing, and the clearance weight of wrong this direction of increasing.
Because the signal fused device can judge it is the priority requisition of same public transport, or the priority requisition of many public transport, therefore, at this situation, response time t is set, for t may cause teleseme to judge by accident in the time repeatedly application, described Signal Pretreatment is: unnecessary priority requisition signal is shielded.
Specific implementation is: pick up counting after receiving once application, invalid application is all regarded in the application in time t as, it is not transferred to teleseme.T is after the time, if also have priority requisition, shows that this public transport also do not pass through the crossing, really there is preferential necessity, therefore receives once application again, be transferred to teleseme, and then restart timing, and repeat above process, can finish the shielding of redundant signals like this.If the priority requisition of many different public transit vehicles, then the priority requisition signal of the corresponding number of times of normal transmission.
B. point detection signal is far away apart from the crossing, and same vehicle has only the situation of single application: for the road that has, the distance at point detection signal and crossing is far away, when public transit vehicle process check point, sends the priority requisition signal one time; But because distance, time are long, the priority requisition signal deficiency of sending then can't reach the purpose of public traffic in priority so that public transit vehicle passes through the crossing in the time of priority requisition signal.
At this situation, described pre-service is: the signal fused device can be according to the distance of check point apart from the crossing, form repeatedly priority requisition signal, the letter of application of the formation of distance number often, the signal number of times of the formation that distance is near is few, number of times can be according to distance adjustment, and is preferential to realize effective public.
Specific implementation is: suppose that check point is S to the distance at crossing, establish reference range D in the signal fused device, round number of times as the priority requisition signal with S/D, send one by one by time-delay then, reference range D can adjust according to concrete road information.Generally, for the situation of simulation conventional sense coil, all adopt this mode more than 30 meters usually; For teleseme, according to the teleseme parameter situation is set and decides with digital interface.
C. apply for Signal Processing on the same direction: general direction refers to East and West direction or north-south, with the north-south is example, with north-to-south direction the priority requisition signal may be arranged simultaneously from south to north on this direction, because the access interface of teleseme has quantitative restriction, when south orientation north, north orientation south to priority requisition signal when inserting teleseme as two different ports, may cause the teleseme port not enough.
At this situation, described pre-service is: receive south orientation north, north orientation south to the priority requisition signal time, as long as two-way signal phase is identical, the signal fused device just can merge it as one tunnel priority requisition signal access interface of a Seize ACK message machine; If teleseme has enough access interface, the signal fused device also can form south orientation north, the different priority requisition signal of north orientation south two-way respectively, with the demand of adaptation signal machine.
Such scheme a, b, c are three kinds of Signal Pretreatment modes in particular cases.Under the normal condition, the different public transit vehicles crossing of passing through, for the priority requisition of different vehicle, the signal fused device only needs form according to the signal of receiving the priority requisition signal of corresponding number of times.
For carrying out signal weighting again through pretreated signal, it is the situation of carrying out priority requisition at many public transport on all directions of crossing simultaneously that so-called signal weighting is handled, and needs to consider the priority weight problem of public vehicles and public transit vehicle, rationally carries out preferentially.
Bus signals preferentially is not absolute, is not to a priority requisition signal, and teleseme will be adjusted the signal lamp phase place at once and remove to respond this signal.In the signal controlling process at crossing, need take into full account the demand and the current phase place situation of signal lamp of other current directions.According to practical application as can be known, the vehicle flowrate size that the crossing is crisscross, by this flow information, generally can be with two crisscross big main traffic flow direction of vehicle flowrate and little less important traffic flow directions of vehicle flowrate of being divided into.Not that the preferential degree of this public transport will descend under the situation of main traffic flow direction at crossing when the public transit vehicle traffic direction.
The present invention carries out the weight adjustment to pretreated priority requisition signal, can realize any configuration of the different weights in different crossings.Following two aspects are mainly considered in the weight adjustment of priority requisition signal:
The first, when many public transport of crossing all directions were carried out the public traffic in priority application simultaneously, it was preferential how to carry out vehicle; The second, how to handle the precedence relationship of public transit vehicle and public vehicles.
Traffic study result according to concrete crossing, can determine the relative little less important traffic flow direction of the big main traffic flow direction of vehicle flowrate with vehicle flowrate, main traffic flow direction is being represented the main direction of passenger flow, should have relatively and the higher priority of other public bus network.Therefore, under the crisscross situation that the public traffic in priority application all arranged, the higher weight of main traffic flow direction is set, the weight that minor direction is relatively low that is to say, the crossing all directions are provided with different weight proportions.
The specific implementation of weight adjustment is: when teleseme can only receive the conventional level signal, multiply by weight ratio on this direction by pretreated priority requisition number of signals, obtain applying for that signal sends number of times, export corresponding level signal number by the signal fused device then and deliver to teleseme, thereby realize the weight adjustment; When teleseme can receiving digital signals, multiply by weight ratio on this direction by pretreated priority requisition number of signals, obtain applying for that signal sends number of times, repeatedly send by the communication protocol of signal fused device then, thereby realize the weight adjustment according to the teleseme regulation.
Through signal fused device pre-service and the adjusted priority requisition signal of weight, need carry out signal imitation, form the signal that teleseme can receive.At the teleseme of different model, the signal fused device can be simulated different priority requisition signals, with the interface that adapts to the unlike signal machine and the requirement of various controlled variable.
Generally, the teleseme of variety classes, different model all has the function of level triggers.Vehicle can trigger pulsatile once at the teleseme end through magnetic test coil, promptly produces the level triggers signal one time.At the level triggers characteristic of teleseme, the output signal of signal fused device can be simulated the signal of normal coil, is about to pre-service of signal fused device and the adjusted priority requisition signal of weight, becomes the pulse triggering signal of corresponding number of times.
For the teleseme that can receive public traffic in priority application signal, the signal fused device also can analog and digital signal, promptly contains the signal of vehicle ID, exports to teleseme then.
Fig. 3 has provided system at the concrete application example of fast public traffic system of the present invention and has formed and applied environment, among Fig. 3, the system of realization bus signals priority requisition is vehicle equipment 1, signal acquiring board 2, signal fused device 3 and teleseme 4 at least, wherein, vehicle equipment 1 is used for passing through of sense vehicle, and obtains vehicle ID information; Signal acquiring board 2 is used to set up and being connected of signal fused device, and vehicle is transferred to the signal fused device by information and vehicle ID information, and the affirmation of picked up signal fusing device and configuration information; Signal fused device 3, information of vehicles that received signal collection plate 2 is sent and priority requisition signal carry out sending to teleseme 4 after pre-service and the weighted to the priority requisition signal; Teleseme 4 is used for according to the priority requisition signal of receiving signal lamp being implemented phase control.Darker regions is the road of vehicle ' among Fig. 3, and Fig. 3 center is signal lamp, and the white portion of signal lamp both sides is isolation strip, comprises the platform of public transit vehicle in the isolation strip.
The applied environment that provides based on Fig. 3 comprises at the vehicle priority requisition process of a direction:
Step 30: bus A travels along the direction of arrow, and when passing through vehicle equipment 1, vehicle equipment 1 detects passing through of bus A; Here, vehicle equipment can be an antenna;
Step 31: signal acquiring board 2 is read vehicle ID information, and information of vehicles and check point coded message are transferred to signal fused device 3, promptly sends priority requisition;
Step 32: 3 pairs of priority requisition signals of being received of signal fused device carry out pre-service and weighted;
Because bus A has just gone out platform, possible speed is slower, and therefore signal acquiring board 2 possibility repeated detection in a period of time, can transmit the priority requisition signal to signal fused device 3 repeatedly to the vehicle ID information of bus A.So, described pre-service is exactly: after signal fused device 3 is received the priority requisition signal, check point information, vehicle heading and vehicle ID information are judged, if find it is the ID of same vehicle, in time t, carried out repeatedly priority requisition, then only to teleseme 4 transmission primaries priority requisition signals; As overtime t, if the application signal is still arranged, signal fused device 3 is just simulated the priority requisition signal again one time, is transferred to teleseme.
Through after the pre-service, the signal times after will handling again is with weight ratio corresponding on this direction, and the result is as the priority requisition signal of this direction.Here, can be multiply by the weight ratio of this direction through the priority requisition number of times of this definite direction of pre-service, obtain new priority requisition number of times, send new priority requisition time several priority requisition signals then to teleseme.
Step 33: will be through the signal after pre-service and the weighted, the signal of simulation normal coil is exported to teleseme 4 then.
Step 34: teleseme 4 is implemented phase control according to the priority requisition signal of receiving to signal lamp, determines the direction, time of prior-release etc.
In the real application systems, all be provided with check point in all directions, the signal acquiring board of check point can be read the vehicle dealing information of all directions, with all information transmission of reading to the signal fused device, the signal fused device carries out after suitable pre-service and weight adjust the priority requisition signal of crossing all directions, the final application signal that generates certain frequency flows to teleseme, by teleseme signal lamp is controlled.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (9)
1, a kind of signal fused device is characterized in that, this device is arranged between signal acquiring board and the teleseme, comprises access unit, CPU, isolation level signal output unit, UART digital signal output unit, wherein,
Access unit is used to connect long-range signal acquiring board, receives the priority requisition signal that comprises the information of vehicles that collects;
CPU, be used for according to pre-configured parameter, comprise weight configuration, sigtnal interval configuration, the setting of reference range D and the setting of pre-service redundancy time parametric t, the application signal is carried out pre-service, in the response time that sets in advance, masking redundancy priority requisition signal; And described pretreated signal is weighted processing, according to different traffic flow directions different weight ratios is set, and sends the application signal to teleseme according to result's control of pre-service and weighted;
The isolation level signal output unit links to each other with teleseme, and the priority requisition signal is sent to teleseme;
UART digital signal output unit links to each other with teleseme, and the exchanges data between realization and the teleseme is finished signal application function.
2, signal fused device according to claim 1 is characterized in that, described access unit comprises UART expanding element and one or more access module.
3, signal fused device according to claim 2 is characterized in that, described access module is based on the access module of RS485 bus mode and/or based on the access module of wireless mode.
4, a kind of system that uses the bus signals priority requisition of the described signal fused device of claim 1, this system comprises vehicle equipment and teleseme, it is characterized in that, this system also comprises signal acquiring board and signal fused device, wherein,
Vehicle equipment is used for collection vehicle by information and vehicle ID information;
Signal acquiring board is used to obtain the information of vehicles that vehicle equipment detects, and will comprises that the priority requisition signal of the information of vehicles that collects is transferred to the signal fused device by long haul communication; Also be used to receive the information synchronization that is used for the collision of elimination information of described signal fused device transmission and the signal that application is fed back.
The signal fused device, be used for information of vehicles and priority requisition signal that the received signal collection plate is sent, according to pre-configured parameter, comprise weight configuration, sigtnal interval configuration, the setting of reference range D and the setting of pre-service redundancy time parametric t, according to pre-configured parameter, comprise weight configuration, sigtnal interval configuration, the setting of reference range D and the setting of pre-service redundancy time parametric t, the application signal is carried out pre-service, in the response time that sets in advance, masking redundancy priority requisition signal; And described pretreated signal is weighted processing, according to different traffic flow directions different weight ratios is set; And send the priority requisition signal to described teleseme according to the result after described pre-service and the weighted; Also be used for sending the signal that is used for information synchronization and application feedback information to described signal acquiring board.
Teleseme is used for according to the priority requisition signal of receiving signal lamp being implemented phase control.
5, a kind of method that realizes the bus signals priority requisition is characterized in that, this method may further comprise the steps:
A, collection vehicle information produce the priority requisition that comprises institute's collection vehicle information and check point coded message according to the information of vehicles that signal acquiring board collected and send to the signal fused device;
B, described signal fused device carry out pre-service to the priority requisition of receiving, and pretreated signal are weighted processing according to pre-configured parameter, will send to teleseme through the priority requisition of weighted; Described pre-service is: in the response time that sets in advance, and the priority requisition signal of masking redundancy; Described pretreated signal is weighted is treated to: different traffic flow directions is provided with different weight ratios;
C, teleseme carry out phase control according to the priority requisition signal of receiving to signal lamp.
6, method according to claim 5, it is characterized in that, described in the step B at the priority requisition signal of the response time inner screening redundancy that sets in advance, be specially: response time t is set, after receiving once application, pick up counting, invalid application is all regarded in application in time t as, it is not transferred to teleseme; T if also have priority requisition, then receives once application after the time again, is transferred to teleseme, and then restarts timing, repeats above process; If the priority requisition of many different public transit vehicles, then the priority requisition signal of the corresponding number of times of normal transmission;
Perhaps,
According to the distance of check point apart from the crossing, form once above priority requisition signal, send to teleseme one by one by time-delay, be specially: establishing check point is S to the distance at crossing, establish reference range D in the signal fused device, round number of times as the priority requisition signal with S/D, send one by one by time-delay then, reference range D can adjust according to concrete road information;
Perhaps,
For from the counterparty to the identical priority requisition signal of phase place merge, be specially:
If teleseme does not have enough access interface, when receive south orientation north, north orientation south to, or east orientation west, west east to the priority requisition signal time, if the two-way signaling phase place of described direction is identical, then the signal fused device merges it as one tunnel priority requisition signal, an access interface of a Seize ACK message machine; If teleseme has enough access interface, the signal fused device then generates south orientation north to described direction, north orientation south, or east orientation west, west east to two-way priority requisition signal.
7, according to claim 5 or 6 described methods, it is characterized in that, described different traffic flow directions is provided with different weight ratios, teleseme is specially: when can only receive the conventional level signal, multiply by weight ratio on this direction by pretreated priority requisition number of signals, obtain applying for that signal sends number of times, export corresponding level signal number by the signal fused device then and deliver to teleseme, thereby realize the weight adjustment; When the teleseme receiving digital signals, multiply by weight ratio on this direction by pretreated priority requisition number of signals, obtain applying for that signal sends number of times, repeatedly send by the communication protocol of signal fused device then, thereby realize the weight adjustment according to the teleseme regulation.
8, method according to claim 7, it is characterized in that the message that described signal acquiring board sends to the signal fused device comprises instruction header, classes of instructions, data length, check point coding, data content, vehicle ID, verification and and end mark at least.
9, according to each described method of claim 5 to 8, it is characterized in that, this method further comprises: the signal fused device sends message to signal acquiring board, be used for information synchronization and application feedback information, described instruction header, classes of instructions, data length, data content, verification and and the end mark of comprising at least.
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Families Citing this family (15)
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| CN102622901B (en) * | 2011-01-30 | 2013-12-25 | 李志恒 | Control system for providing priority signal for special vehicle and method thereof |
| CN102622903B (en) * | 2011-01-30 | 2014-03-19 | 李志恒 | Transit signal priority automation control system capable of carrying out information prompt and method thereof |
| CN102186120A (en) * | 2011-04-14 | 2011-09-14 | 网拓(上海)通信技术有限公司 | Distribution frame with intelligent port scanning device and distribution system |
| CN102568221A (en) * | 2011-12-23 | 2012-07-11 | 北京易华录信息技术股份有限公司 | Bus priority control system and method based on timetable |
| CN106803351A (en) * | 2015-11-26 | 2017-06-06 | 上海源奋电子科技有限公司 | A kind of vehicle priority pass method and system |
| CN106652528B (en) * | 2017-02-15 | 2019-10-15 | 东南大学 | A kind of microcosmic traffic signal control data quality determining method and system |
| CN109754617B (en) * | 2017-11-01 | 2021-07-13 | 张云超 | High-traffic-efficiency traffic signal lamp control system |
| CN108169747A (en) * | 2017-12-28 | 2018-06-15 | 南京慧尔视智能科技有限公司 | A kind of intersection induction control system and its method based on microwave |
| CN111325996B (en) * | 2018-12-14 | 2023-04-14 | 博泰车联网科技(上海)股份有限公司 | Vehicle passing application method and system, computer readable storage medium and terminal |
| CN109785646A (en) * | 2019-01-25 | 2019-05-21 | 杭州商警云智能科技有限公司 | A kind of public transport based on vehicle tracking is turned left preferential system, road and method |
| CN110055843B (en) * | 2019-05-31 | 2023-12-12 | 刘建峰 | Barrier-free bus road system |
| CN111402603B (en) * | 2020-03-17 | 2021-01-26 | 杭州海康威视系统技术有限公司 | Traffic signal control method and device, electronic equipment and machine-readable storage medium |
| CN112927525B (en) * | 2021-05-11 | 2021-08-10 | 华砺智行(武汉)科技有限公司 | Signal lamp phase distribution method and device under intelligent networking environment and storage medium |
| CN113593272B (en) * | 2021-07-20 | 2022-07-01 | 青岛海信网络科技股份有限公司 | Vehicle priority passing method and signal machine |
| CN115294779B (en) * | 2022-07-21 | 2024-07-23 | 杭州海康威视数字技术股份有限公司 | Control method for road traffic signal, terminal device and computer storage medium |
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