CN106781562B - Signal control system and method for single-lane bidirectional passing workshop intersection - Google Patents
Signal control system and method for single-lane bidirectional passing workshop intersection Download PDFInfo
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Abstract
The invention belongs to the field of intersection traffic signal control, and particularly relates to a signal control system and method for a single-lane bidirectional traffic workshop intersection. The signal control system consists of a vehicle detection system, a vehicle passing signal indication system, a passing signal control device, a transparent quick rolling door of a workshop passage and a traffic safety facility system; the control method is based on the design parameters of the intersection are firstly determined by the signal control system, then the traffic flow characteristics of a single lane and a passage in a workshop are determined, then the traffic safety facility system setting of the intersection is carried out, then a vehicle passing signal indication system is set, a vehicle detection system is laid, and finally the intersection control strategy and the timing scheme are determined. The invention provides a practical and feasible signal control system and method for an intersection between a single-lane bidirectional traffic crossing a workshop and an objective passage in the workshop, and solves the control problem of the intersection.
Description
Technical Field
The invention belongs to the field of intersection traffic signal control, and particularly relates to a signal control system and method for a single-lane bidirectional traffic workshop intersection.
Background
The existing intersection signal control system and method can control various intersections formed by two-way roads, intersections formed by one-way roads and two-way roads and intersections formed by one-way roads and one-way roads, and are not suitable for intersections formed by one-way lanes which can only pass through a single-direction traffic flow and need to alternately pass in two directions and logistics vehicle two-way passing channels in a workshop. Although such non-universal intersections are not advocated in plant planning, some plants exist with such intersections due to plant land and environmental constraints and historical reasons of plant planning.
The existing Chinese patent documents CN203038471U single-lane bidirectional traffic signal lamp control device and CN103985259B district single-lane vehicle entrance and exit warning system only relate to a single-lane bidirectional traffic channel control device, do not relate to an intersection control system, cannot solve the signal control of the intersection of the single-lane bidirectional traffic passing through a workshop and an object flow channel in the workshop, and do not relate to a specific control method; due to the particularity of traffic flow organization of intersection between single-lane bidirectional traffic passing through a workshop and an objective passage in the workshop, a practical and feasible control system and method are still lacking at present. The existing manual field command of traffic flow needs the cooperation of a plurality of managers, so that the problems of high intersection management cost, low management efficiency, unblocked intersection traffic and the like are caused.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a signal control system and a signal control method for a single-lane bidirectional passing workshop intersection.
In order to solve the technical problems, the invention adopts the following technical scheme:
a signal control system of a single-lane bidirectional passing workshop intersection is characterized by comprising a vehicle detection system, a vehicle passing signal indication system, a passing signal control device, a transparent quick rolling door of a workshop passage and a traffic safety facility system.
The vehicle detection system is composed of a conventional vehicle detection system and a priority material vehicle detection system. The conventional vehicle detection system comprises a vehicle detector, 4 groups of vehicle use channel request coils, 2 groups of inlet video detection integrated cameras, 2 groups of channel passing direction detection coils, 2 groups of door opening request detection coils, 2 groups of channel use ending detection coils and 2 groups of outlet video detection integrated cameras; the detection coil and the video detection integrated camera are connected with a vehicle detector, and the vehicle detector is connected with a vehicle detection system. The priority material vehicle detection system comprises a detection host, 2 groups of RFID antennae, 2 groups of RFID readers-writers and a vehicle-mounted RFID. The RFID antenna and the RFID reader-writer are integrated devices and are electrically connected with the detection host, and the vehicle detector and the detection host are electrically connected with a vehicle detection system in the signal control device.
The vehicle passing signal indicating system consists of signal lamps consisting of 4 groups of red, yellow and green lamp panels and 4 groups of LED character prompt screens.
The traffic signal control device is a road traffic signal controller and is characterized in that the control strategy provided by the invention is built in, the input end of the traffic signal control device is connected with the vehicle detection system, and the output end of the traffic signal control device is connected with the vehicle traffic signal indication system.
The transparent quick rolling door for the workshop passage is used for solving the contradiction between material flowing through the workshop and maintaining a high-cleanness production environment in the workshop, and is a safe and reliable partition mode for shortening the vehicle passing through the workshop. The opening of the door is controlled by a door entrance request triggering coil and is linked with a corresponding vehicle passing signal indicating device.
The traffic safety facility system consists of a ground straight-going indicating marking, a road central safety isolation column, a speed reduction ridge and a ground no-parking mesh marking, and is used for determining the right of a vehicle.
The signal control method for the intersection of the single-lane bidirectional passing workshop is characterized by being based on the signal control system for the intersection of the single-lane bidirectional passing workshop and comprising the following steps.
Firstly, determining design parameters of an intersection;
the intersection design parameters comprise: lengths Le and Lw of entry canalization sections on two sides of single lane and lengths L of two ends of single laneetAnd LwtThe length LL of a single lane in a workshop; the acquisition method of the parameters comprises the following two methods:
1) And carrying out on-site survey and measurement to obtain intersection design parameters. As shown in fig. 2, the lengths Le and Lw of entry canalization sections at two sides of a single lane and the lengths L of two ends of the single lane are measured by using a distance meteretAnd LwtThe length LL of a single lane in the workshop;
2) Collecting and looking up intersection design drawings, and directly obtaining design parameters of the intersection.
Secondly, determining the traffic flow characteristics of the single lane and the passage in the workshop;
the traffic flow characteristics here include five parameters: traffic flow Qi in each traffic direction, unit: veh/h; the ratio Pi, unit of the logistics vehicles in each passing direction: percent; the passing direction corresponds to 4 traffic flows of F1, F2, F3 and F4 in the figure 2. The head-hour distance Hi and the unit s of the logistics vehicle in the passage passing direction in the workshop; passage passing direction logistics in workshopThe vehicle head distance Di is unit m; the passing direction corresponds to the two flow directions F1 and F3 in fig. 2. Average speed V of traffic flow in single laneaverageiThe unit m/s. The acquisition method of the parameters comprises the following two methods:
1) And (5) carrying out field traffic investigation, and acquiring and calculating traffic flow characteristic data of the single lane and the traffic direction of the lane in the workshop. The method aims at upgrading an artificially commanded management intersection into a signal control intersection, investigating the total number of vehicles passing through each passing direction of the intersection and the number of logistics vehicles passing through each passing direction in a peak period, and calculating the traffic flow Qi of each passing direction of the intersection and the logistics vehicle proportion Pi of each passing direction by using data obtained by investigation; investigating the time distance Hi and the distance Di between the car heads of the logistics car in the passage passing direction in the workshop; the average passing time of the passing vehicles in the single lane is investigated, and the average speed V of the traffic flow in the single lane is calculated by using the data obtained by investigationaveragei；
2) Analyzing and predicting, and directly determining the traffic flow characteristics of the single lane and the passage in the workshop. Aiming at newly-built intersection signal control, the method fully considers the intersection traffic demand in the planning and designing stage, obtains the traffic flow Qi of each passing direction of the intersection, the logistics vehicle proportion Pi of each passing direction, the vehicle head time distance Hi and the vehicle head distance Di of the logistics vehicle in the passing direction of the passage in the workshop, and the average speed V of the vehicle flow in the single laneaveragei。
Step C, setting an intersection traffic safety facility system;
a basic guarantee for the operation of a signal control system of a single-lane bidirectional passing workshop intersection is an intersection safety facility system, as shown in figure 2, the intersection comprises four entrance lanes AP1, AP2, AP3 and AP4, each entrance lane is channelized according to traffic flow passing requirements, and the intersection comprises four traffic flow directions F1, F2, F3 and F4. The method is characterized in that canalization design is carried out on a single lane, each end of the single lane is set as a vehicle entering request area and a vehicle exiting area, a road central isolation column is arranged between the vehicle entering request area and the vehicle exiting area, and a ground straight-going direction indicating marking line is marked. A stopping prohibition mesh-shaped marking line is arranged in a single-lane workshop, and a speed reduction ridge is arranged in front of a transparent quick-rolling door entering a passage on two sides of the workshop.
D, setting a vehicle passing signal indicating system;
according to the driver viewpoint distribution and the traffic flow average speed of the traffic flows F1, F2, F3 and F4 and the setting specification of the general signal lamps, four groups of signal lamps are composed of three arrow lamp panels of upper red, middle yellow and lower green and are vertically installed as shown in figure 2. The invention is mainly characterized in that signal lamps are arranged in the vehicle entering request areas at two ends of the single lane, and simultaneously, a character prompting screen is arranged, and the signal lamps are linked with the character screen. The character prompt screen synchronously displays the character information to further clarify the right of the single lane passing direction, and channel blockage caused by accidental occupation of channels in a workshop when the single lane is alternately used is avoided.
E, laying a vehicle detection system;
in order to realize the signal control strategy, a vehicle detection system consisting of a conventional vehicle detection system and a priority logistics vehicle detection system is arranged at the intersection, as shown in fig. 2. A conventional vehicle detection system includes: a vehicle detector B2; ground vehicle detection coils NN and SS are arranged at inlets of the intersections AP1 and AP3 and used for detecting whether vehicle passing demands exist in the traffic flows F1 and F3 or not. A ground vehicle detection coil E1, ED and ED and an imported vehicle video detection integrated camera D6 are arranged at an inlet of the intersection AP2, and a ground coil W2 and an exported vehicle video detection integrated camera D5 are arranged at an outlet of the intersection AP 2. The coil E1 is used for detecting whether a vehicle passing request exists in the AP2 inlet traffic flow F2 or not, and acquiring the traffic flow Q2, the vehicle head time interval H2 and the vehicle head interval D2 of the traffic flow F2. And the coils ED and ED are the opening request coils of the transparent quick rolling doors at two sides of the workshop, and the transparent quick rolling doors at two sides are opened when the vehicle occupies the coils ED and then occupies the coils ED. The coil W2 is a channel use end coil. The video detection integrated camera D6 for the imported vehicle and the video detection integrated camera D5 for the exported vehicle are used for acquiring vehicle images and license plate number data. The detection coils W1, WD and WD of the ground vehicles and the video detection integrated camera D3 of the vehicles at the entrance of the intersection AP4 are arranged, and the detection coils W1 of the ground vehicles and the video detection integrated camera D1 of the vehicles at the exit of the intersection AP4 are arranged. The coil W1 is used for detecting whether a vehicle passing request exists at the inlet AP4 or not, and acquiring the traffic flow Q4 of the traffic flow F4, the vehicle head time distance H4 and the vehicle head distance D4. The coils WD and WD are the double-side transparent quick rolling door opening request coils in the workshop, and when the vehicle occupies the coil WD first and then occupies the coil WD, the double-side transparent quick rolling door is opened. The coil E2 is a channel use end coil. The video detection integrated camera D3 for the imported vehicle and the video detection integrated camera D1 for the exported vehicle are used for acquiring vehicle images and license plate number data. Whether vehicles pass through a single lane is judged by comparing whether license plate number data collected by the cameras D6 and D1 and the cameras D3 and D5 are consistent, and it is ensured that vehicles entering the single lane pass through a workshop corridor and then exit the workshop corridor. When the vehicle detection system judges that the single-lane vehicle is used and the door self-detection system detects that the vehicle completely passes through, the door falls down and is closed
The preferential logistics vehicle detection system comprises an RFID antenna and RFID reader-writer integrated device D7 arranged at the inlet of the AP2, an RFID detection host B2, an RFID antenna and RFID reader-writer integrated module D2 arranged at the inlet of the AP4, and a vehicle-mounted RFID card arranged on a logistics vehicle. The prior logistics vehicle detection system is used for detecting logistics vehicles needing prior passing at the entrances of the AP2 and the AP4 of the single lane, and transmitting a prior request to the vehicle detection system in the passing signal control device.
And F, determining an intersection control strategy and basic timing.
1) Vehicle traffic prioritization
The consistency of the passage of the logistics vehicles in the workshop and the pulling of the workshop production is fully considered, and the fact that the logistics vehicle flow in the inlet of the channels AP1 and AP3 in the workshop has the highest-level priority passage right is determined on the basis that the smooth flow of the logistics vehicles is the key requirement for the continuity of the production flow; the logistics vehicles passing through the workshop by using the single lane AP2 and AP4 access lanes have the second-level priority right of passage, and the second level preferably adopts a priority mode when in request; the lowest level of right of way is provided for other vehicles passing through the workshop and using the single lane AP2 and AP4 for entrance.
2) Intersection signal phase sequence determination
Based on the vehicle passing priority level and the intersection traffic conditions, the logistics vehicle flows F1 and F3 which are passed through the passages AP1 and AP3 in the workshop are first phase ST1, pass through the workshop single lanes AP2 and AP4 and are arranged in a split-phase mode, the requirement that the single lanes are alternately used to realize bidirectional passing is met, the direction with high logistics vehicle proportion and high priority requirement in the F2 and F4 vehicle flows is taken as a second phase ST2, and the direction with low logistics vehicle proportion and low priority requirement is taken as a third phase ST3. As shown in fig. 3 (assuming the F2 logistics vehicles have a large proportion and high priority requirements).
3) Determination of signal control strategy
Based on the intersection signal phase sequence scheme, the invention provides a signal control strategy for a single-lane bidirectional traffic workshop intersection, and provides a phase switching method and a phase priority method, wherein the phase switching and priority flow is shown in figure 4.
Step1: the method comprises the steps that a first phase ST1 starts to operate at an intersection, entrance traffic flows F1 and F3 of corridor passages AP1 and AP3 in a workshop pass through, after the minimum green light time of the traffic flows F1 and F3, if the entrance traffic flow F2 of the passage AP2 is detected to come, the phase ST1 finishes executing Step2, otherwise, the phase ST2 is skipped, then whether the entrance traffic flow F4 of the passage AP4 comes is detected, if the entrance traffic flow F4 of the AP4 comes is detected, step3 is executed, and otherwise, the phase ST3 is skipped, and Step1 is executed.
Step2: the intersection starts to operate a second phase ST2, the vehicle flow F2 passes through the entrance of the workshop single lane channel AP2, and the vehicle flow F2 operates for the minimum green light time Gmin(2) Then, when a material vehicle priority request is detected in the subsequent flow F2, the green light time of the phase ST2 is prolonged by the unit green light prolonging time X seconds every time the priority is detected, and if the maximum green light time G of the flow F2 is detectedmax(2) When the priority request is not continuously detected or the green time reaches the maximum green time G of the flow F2max(2) The phase ST2 is ended, and then it is detected whether the traffic flow F4 at the entrance of the lane AP4 arrives, step3 is executed if the traffic flow F4 at the entrance of the lane AP4 is detected, otherwise Step1 is executed by skipping the phase ST3.
Step3: the intersection starts to operate a third phase ST3, a traffic flow F4 passes through a workshop single lane passage AP4 and enters, and the traffic flow F4 operates for a minimum green light time Gmin(4) Then, if the traffic flows F1 and F3 are detected to come, the ending phase ST3 returns to execute Step1; such asIf the incoming vehicles of the traffic flows F1 and F3 are not detected, and a material vehicle priority request is detected in the traffic flow F4 at the inlet of the access AP4, the green light time of the phase ST3 is prolonged by a unit green light prolonging time X seconds every time when the priority is detected, and if the maximum green light time G of the traffic flow F4 is detectedmax(4) The priority request is not continuously detected or the green light time reaches the maximum green light time G of the traffic flow F4max(4) The end phase ST3 performs Step1.
Preferably, the method for determining the minimum green time is as follows:
wherein:
a minimum green time for traffic flow Fi;
the vehicle flow Fi start delay, which generally takes the value of 5s, can also be obtained by investigation;
average head spacing of the traffic flow Fi;
the vehicle flow Fi average speed; and N is the number of vehicles in the logistics of one delivery or the average number of vehicles in line.
Preferably, the method for determining the traffic flow Fi green light single-vehicle green light extension time X comprises the following steps:
wherein,
the headway time of the traffic flow Fi;
the lengths of canalization sections for single-lane inlets AP2 and AP4 are provided;
the average speed of the traffic flow Fi;
for the time when a vehicle is driven into a single lane from being detected to passing through a channeling section
Are weighting coefficients.
Preferably, the maximum green time determining method is as follows:
wherein:
the time is the maximum green light time of the traffic flow Fi;
clearing the full red time for phase ST2;
clearing full Red for phase ST3A (c) is added;
the yellow lamp time is taken according to 3 seconds; le and Lw are lengths of entrance canalizations on two sides of the single lane;
the length of two ends of a single lane; LL is the length of a single lane in a workshop;
the maximum signal period.
4) Maximum signal period
Is determined
Based on the signal control strategy of fig. 4, although the cycle time constraint of the traditional signal control is not needed, the logistics vehicle passing through the intersection of the access traffic flows F1 and F3 of the AP1 and the AP3 in the workshop basically has the metronomic property, so as to ensure that the phase ST1 with the highest priority level meets the logistics vehicle passing right and the delivery beat of the production logistics vehicle
The phases (unit: minute) are consistent, and based on the signal control strategy, when the intersection signal control phase sequence scheme runs the phase ST2 or the phase ST3 of the traffic flow passing through the single lane, the phase ST2 and the phase ST3, the AP1 and the AP3 in the workshop are ensured to pass through the intersection according to the delivery beat required by daily production by the inlet traffic flow F1 and the inlet traffic flow F3 through the maximum signal period. Maximum signal period (
) According to delivery beat
Determining:
wherein,
minimum green time for phase ST1;
logistics vehicle delivery interval, unit: the method comprises the following steps of (1) taking minutes;
the maximum green time of the phase ST2 and the phase ST3 respectively;
clear full red time for phase ST2;
clear full red time for phase ST 3;
the yellow lamp time is taken according to 3 seconds; le and Lw are lengths of entrance canalizations on two sides of the single lane;
the length of two ends of a single lane; LL is the length of a single lane in a workshop;
based on the signal control strategy, when the intersection signal control phase sequence scheme does not run the phase ST2 and the phase ST3 of the traffic flow passing through the single lane, the phase ST1 is equivalent to a normally-on green light, and the determined maximum signal period is not used
。
The invention has the beneficial effects that:
1) Compared with the traditional intersection signal control, the signal control system and the signal control method for the intersection of the single-lane bidirectional passing workshop, which are provided by the invention, can solve the signal control problem of the special intersection;
2) The invention solves the problem of priority control of the logistics vehicles under the control strategy of single lane bidirectional traffic and ensures the continuity of the workshop production process;
3) The invention sets the transparent quick rolling doors passing through two sides of the workshop passage, the opening and closing of the doors are synchronous with the signal control, and the contradiction between the quick material flow passing through the workshop and the maintenance of a highly clean production environment in the workshop is solved.
Description of the drawings:
FIG. 1 is a schematic view of an intersection and a signal control system according to the present invention;
FIG. 2 is a schematic view of the intersection signal control design parameters of the present invention;
FIG. 3 is a schematic diagram of the phase-sequence scheme of the signals of the present invention;
FIG. 4 is a flow chart of a signal control strategy implementation of the present invention;
FIG. 5 is an overall flow chart of the method of the present invention;
wherein: B1. a traffic signal control device; B2. a vehicle detector; b3, RFID detection host; d1, D3, D4 and D6. An integrated camera; d2, D5.RFID reader-writer and RFID antenna integrated device;
a vehicle-mounted RFID card; s1, S3, S5 and S7. Signal lamps; s2, S4, S6 and S8.LED character prompt screens; m1, M2, transparent quick rolling doors of the workshop passage; TS1, a ground straight line indicating marking line; TS2. Road central safety partitionSeparating from the column; TS3, decelerating ridges; TS4, the ground prohibits parking the netted marking; NN, SS, E1, E2, ED, W1, W2, WD.
The specific implementation mode is as follows:
the present invention will be further described with reference to the accompanying drawings. A signal control system and a signal control method for a single-lane bidirectional passing workshop intersection comprise a signal control system for a single-lane bidirectional passing workshop intersection and a control method based on the signal control system.
A signal control system of a single-lane bidirectional passing workshop intersection is characterized by comprising a vehicle detection system, a vehicle passing signal indication system, a passing signal control device, a transparent quick rolling door of a workshop passage and a traffic safety facility system.
In connection with fig. 1.
The vehicle detection system comprises a conventional vehicle detection system consisting of a vehicle detector (B2), detection coils (NN, SS, E1, E2, ED, ED, W1, W2, WD and WD), and an RFID detection host (B3), an RFID reader-writer and RFID antenna integrated device (D2, D5) and a vehicle-mounted RFID (radio frequency identification device) (RFID)
) Constitute the vehicle detection system of priority commodity circulation. The vehicle detector (B2) is electrically connected with the detection coils (NN, SS, E1, E2, ED, ED, W1, W2, WD and WD), the RFID detection host (B3) is electrically connected with the RFID reader-writer and the RFID antenna integrated device (D2 and D5), the vehicle detector (B2) and the RFID detection host (B3) are electrically connected with a vehicle detection system positioned in the traffic signal control device (B1), and the vehicle detection system is connected with the input end of the traffic signal control device (B1).
The vehicle passing signal indicating system is composed of signal lamps (S1, S3, S5 and S7) and LED character prompt screens (S2, S4, S6 and S8) which are electrically connected with the output end of the passing signal control device (B1).
The traffic signal control device (B1) is a road traffic signal controller and is characterized in that the control strategy provided by the invention is built in, the input end of the traffic signal control device is connected with the vehicle detection system, and the output end of the traffic signal control device is connected with the vehicle traffic signal indication system.
The workshop passageway transparent quick rolling doors (M1, M2) are used for keeping a clean production environment in a workshop, the opening of the workshop passageway transparent quick rolling doors is controlled by triggering detection coils (ED, ED, WD, WD) through a doorway entrance request, and the workshop passageway transparent quick rolling doors are linked with corresponding traffic signal lamps (S3, S7) to realize the opening; and when the vehicle detection system detects that no vehicle passes through a single lane of the workshop according to the collected data, the door falls and is closed.
The traffic safety facility system comprises a ground straight-going indication marking line (TS 1), a road central safety isolation column (TS 2), a speed-reducing ridge (TS 3) and a ground stop-forbidding mesh marking line (TS 4).
A signal control method for a single-lane bidirectional passing workshop intersection is characterized in that intersection traffic flow is controlled based on the signal control system (shown in figure 1) according to the steps given in figure 5 and the signal control strategy implementation flow shown in figure 4. The invention is explained by taking an intersection of a workshop of a certain enterprise of a smoke station as an embodiment, and a schematic design diagram of the intersection is shown in FIG. 2.
The steps are as follows.
Firstly, determining design parameters of an intersection; the intersection comprises the following components: lengths Le and Lw of entry canalization sections on two sides of single lane and lengths of two ends of single lane
The length LL of a single lane in a workshop; in this embodiment, the design parameters in fig. 2 are measured on site, and Le = Lw =8 m, let = Lwt =6 m, and LL =12 m.
Secondly, determining the traffic flow characteristics of the single lane and the passage in the workshop; the intersection comprises the following components: traffic flow Qi in each traffic direction, unit: veh/h; the ratio Pi, unit of the logistics vehicles in each passing direction: percent; the passing direction corresponds to 4 traffic flows of F1, F2, F3 and F4 in fig. 2. The head-hour distance Hi and the unit s of the logistics vehicle in the passage passing direction in the workshop; the inter-vehicle channel passing direction logistics vehicle head distance Di is unit m; the passing direction corresponds to the two flow directions F1 and F3 in fig. 2. SheetAverage speed of traffic flow in lane
In m/s; in this embodiment, the following data of intersection traffic flow characteristics are obtained through investigation:
| direction of passage | F1 | F2 | F3 | F4 |
| Flow rate Q, veh/h | 24 | 15 | 24 | 12 |
| The logistics rate P% | 100% | 20% | 100% | 16% |
| Headway H, s | 3.5 | 3 | 2.8 | 3 |
| The distance D between the vehicle heads is set, |
12 | 15 | 10 | 15 |
| average velocity Vaverage，m/s | 3.4 | 5 | 3.6 | 5 |
Step C, setting an intersection traffic safety facility system; as shown in fig. 2, in the present embodiment, the intersection traffic safety facility system includes a straight road indicating marking (TS 1), a central safety isolation pillar (TS 2), a decelerating ridge (TS 3), and a mesh stopping prohibition marking (TS 4).
And D, setting a vehicle passing signal indicating system. As shown in fig. 2, in the present embodiment, the intersection vehicle traffic signal indicating system is composed of four groups of signal lamps (S1, S3, S5, S7) electrically connected to the output end of the traffic signal control device (B1), and four-side LED text prompt screens (S2, S4, S6, S8).
E, laying a vehicle detection system;
in order to implement the signal control strategy in step F, as shown in fig. 2, a vehicle detection system composed of a conventional vehicle detection system and a priority logistics vehicle detection system is arranged at the intersection;
a conventional vehicle detection system includes: a vehicle detector B2; ground vehicle detection coils NN and SS are arranged at the entrances of the intersections AP1 and AP3 and are used for detecting whether the vehicle flows F1 and F3 have vehicle passing requirements or not; the method comprises the following steps that ground vehicle detection coils E1, ED and ED and an imported vehicle video detection integrated camera D6 are arranged at an inlet of an intersection AP2, and a ground coil W2 and an exported vehicle video detection integrated camera D5 are arranged at an outlet of the AP 2; the coil E1 is used for detecting whether a vehicle passing request exists in the AP2 inlet traffic flow F2 or not, and acquiring the traffic flow Q2, the vehicle head time distance H2 and the vehicle head distance D2 of the traffic flow F2. The coils ED and ED are the opening request coils of the transparent quick rolling doors at two sides of the workshop, and when the vehicle occupies the coils ED and then occupies the coils ED, the transparent quick rolling doors at two sides are opened; the coil W2 is a channel use ending coil; the video detection integrated camera D6 for the imported vehicle and the video detection integrated camera D5 for the exported vehicle are used for acquiring vehicle passing images and license plate number data; the detection system is characterized in that ground vehicle detection coils W1, WD and WD and an inlet vehicle video detection integrated camera D3 are arranged at an inlet of an intersection AP4, and a ground coil W1 and an outlet vehicle video detection integrated camera D1 are arranged at an outlet of the AP 4. The coil W1 is used for detecting whether a vehicle passing request exists in an access AP4 traffic flow F4 or not, and acquiring a traffic flow Q4, a vehicle head time interval H4 and a vehicle head space interval D4 of the traffic flow F4; the coils WD and WD are the starting request coils of the transparent quick rolling doors at the two sides of the workshop, and when the vehicle occupies the coil WD firstly and then occupies the coil WD, the transparent quick rolling doors at the two sides are opened; the coil E2 is a channel use ending coil; the imported vehicle video detection integrated camera D3 and the exported vehicle video detection integrated camera D1 are used for acquiring vehicle passing images and license plate number data; whether vehicles pass through a single lane is judged by comparing whether license plate number data collected by the cameras D6 and D1 and the cameras D3 and D5 are consistent, and it is ensured that vehicles entering the single lane pass through a workshop corridor and then exit the workshop corridor. When the vehicle detection system judges that the single-lane vehicle is used and the door self detection system detects that the vehicle completely passes, the door falls and is closed;
the prior logistics vehicle detection system comprises an RFID antenna and RFID reader-writer integrated module D7 arranged at the inlet of the AP2, an RFID detection host B2, an RFID antenna and RFID reader-writer integrated module D2 arranged at the inlet of the AP4, and a vehicle-mounted RFID card arranged on a logistics vehicle. The priority logistics vehicle detection system is used for detecting logistics vehicles needing priority passing in traffic flows F2 and F4 of single lanes AP2 inlet and AP4 inlet, and transmitting priority requests to the vehicle detection system in the passing signal control device.
And F, determining an intersection control strategy and basic timing.
1) Vehicle traffic prioritization
As shown in fig. 2, in this embodiment, the traffic flows F1 and F3 of the AP1 and AP2 entrance lanes have the highest-level priority right of passage, 15veh/h of traffic of the AP2 entrance lane F2, 20% of the ratio of logistics vehicles are higher than the traffic flow F4 of the AP3 entrance lane, and the traffic flow F2 is the second-level priority right of passage, and the vehicle-mounted RFID detection is adopted for priority. The lowest level of the flow F4 takes precedence.
2) Intersection signal phase sequence determination
As shown in fig. 3, in this embodiment, the synchronous straight-going time road right is arranged for the logistics traffic flows F1 and F3 entering the channels AP1 and AP3 in the intersection workshop, and is the first phase ST1; the AP2 inlet traffic flow F2 firstly passes through a single lane, and is a second phase ST2; the AP4 inlet traffic flow F4 is arranged to be the third phase ST3.
3) Determination of signal control strategy
In this embodiment, the intersection traffic signal control device (B1) has built-in the control implementation flow of fig. 4, and the specific control implementation is as follows.
Step1: after the signal control system is started, the signal control system starts to operate a first phase ST1, the signal lamps S1 and S5 are turned on to be green, the LED character prompt screens S2 and S6 display that the vehicle is going to pass, and the traffic flow F1 and the traffic flow F3 pass through the intersection. Phase ST1 minimum green time of operation
In the present embodiment, the first and second electrodes,
comprises the following steps:
Step2: the method comprises the steps that a second phase ST2 starts to operate at an intersection, a signal lamp S7 lights a green lamp, an LED character prompt screen S8 displays that a user can pass, transparent quick rolling doors M1 and M2 are in a state of being opened, a traffic flow F2 runs to the west by using a single lane, a camera D6 at an inlet collects traffic flow images and license plate data, the transparent quick rolling doors M1 and M2 are rolled up and opened after the vehicle in the traffic flow occupies a coil ED firstly and then occupies the coil ED, the traffic flow F2 passes through a workshop, a camera D1 at an outlet collects the traffic flow images and the license plate data, and a coil E2 at the outlet records the number of passing vehicles. Stream F2 minimum green time of operation
In the present embodiment, the first and second electrodes,
comprises the following steps:
Step3: the third phase ST3 starts to operate at the intersection, the signal lamp S3 lights a green lamp, the LED character prompt screen S4 displays that the transparent quick rolling doors M1 and M2 are in a state of opening, the traffic flow F4 runs to the east by using a single lane, the camera D3 at the entrance collects traffic flow images and license plate data, after the vehicle in the traffic flow occupies the coil WD and then occupies the coil WD, the transparent quick rolling doors M1 and M2 are rolled up and opened, the traffic flow F4 passes through the workshop, the camera D4 at the exit collects the traffic flow images and license plate data, and the coil W2 at the exit records the number of passing vehicles. Stream F4 minimum green time of operation
In the present embodiment, the first and second electrodes,
comprises the following steps:
the foregoing description of the examples has been presented for the purpose of illustration only and to enable those skilled in the art to make and use the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (2)
1. A signal control system of a single-lane bidirectional passing workshop intersection consists of a vehicle detection system, a vehicle passing signal indication system, a passing signal control device, a workshop channel transparent quick rolling door and a traffic safety facility system; it is characterized in that the preparation method is characterized in that,
the vehicle detection system comprises a conventional vehicle detection system consisting of a vehicle detector (B2), detection coils (E1, E2, ED, ED, W1, W2, WD and WD), and a priority material vehicle detection system consisting of an RFID detection host (B3), RFID reader-writer and RFID antenna integrated devices (D2 and D5) and vehicle-mounted RFID cards (R1-n); the vehicle detector (B2) is electrically connected with the detection coils (E1, E2, ED, ED, W1, W2, WD and WD), the RFID detection host (B3) is electrically connected with the RFID reader-writer and the RFID antenna integrated devices (D2 and D5), and the vehicle detector (B2) and the RFID detection host (B3) are electrically connected with a vehicle detection system in the traffic signal control device (B1); the vehicle passing signal indicating system consists of signal lamps (S1, S3, S5 and S7) and LED character prompt screens (S2, S4, S6 and S8) which are electrically connected with the output end of the passing signal control device (B1); the traffic signal control device (B1) is a road traffic signal controller, is internally provided with an intersection control strategy, and has an input end connected with the vehicle detection system and an output end connected with the vehicle traffic signal indication system; the workshop passageway transparent quick rolling doors (M1, M2) are used for keeping a clean production environment in a workshop, the opening of the workshop passageway transparent quick rolling doors is controlled by triggering detection coils (ED, ED, WD, WD) through a doorway entrance request, and the workshop passageway transparent quick rolling doors are linked with corresponding traffic signal lamps (S3, S7) to realize the opening; when the vehicle detection system detects that no vehicle passes through a single lane of a workshop according to the collected data, the door falls and is closed;
the traffic safety facility system comprises a ground straight-going indication marking line (TS 1), a road central safety isolation column (TS 2), a speed-reducing ridge (TS 3) and a ground stop-forbidding mesh marking line (TS 4);
the intersection control strategy provides a phase switching method and a phase priority method, and the phase switching and phase priority flow comprises the following steps:
step1: the method comprises the steps that a first phase ST1 starts to operate at an intersection, entrance traffic flows F1 and F3 of corridor passages AP1 and AP3 in a workshop pass through, after the minimum green light time of the traffic flows F1 and F3, if the entrance traffic flow F2 of a passage AP2 is detected to come, the phase ST1 finishes executing Step2, otherwise, the phase ST2 is skipped, whether the entrance traffic flow F4 of the passage AP4 comes is detected, if the entrance traffic flow F4 of the AP4 comes is detected, the Step3 is executed, and otherwise, the phase ST3 is skipped, and the Step1 is executed;
the method for determining the minimum green light time comprises the following steps:
GMin(13)＝Max[GMin(1),GMin(3)]
wherein: gMin(i) A minimum green time for traffic flow Fi; dstartiDelay in the start of the traffic flow Fi; di is the average head distance of the traffic flow Fi; vaverageiThe vehicle flow Fi average speed; n is the number of vehicles in the first distribution logistics or the number of average row-to-vehicle;
step2: the method comprises the steps that a second phase ST2 starts to operate at an intersection, an entrance traffic flow F2 passes through a single lane channel AP2 of a workshop, after the traffic flow F2 operates for the minimum green light time, a material vehicle priority request is detected in a subsequent traffic flow F2, the green light time of the phase ST2 is prolonged for a unit green light prolonged time X seconds every time the priority is detected, if the priority request is not continuously detected in the maximum green light time of the traffic flow F2 or the green light time reaches the maximum green light time of the traffic flow F2, the phase ST2 is ended, then whether an entrance traffic flow F4 of the channel AP4 arrives is detected, if the entrance traffic flow F4 of the AP4 arrives, step3 is executed, and if the entrance flow F4 arrives, the phase ST3 is skipped, and Step1 is executed;
the method for determining the traffic flow Fi green light extension time X of the single vehicle comprises the following steps:
X＝w0×Max[Pt,Hi],
or
Wherein HiThe headway time of the traffic flow Fi; le and Lw are lengths of canalization sections of single-lane inlets AP2 and AP 4; vaverageiThe vehicle flow Fi average speed; ptFor the time w when the vehicle is detected to enter the single lane through the canalized segment0Is a weighting coefficient;
step3: the intersection starts to operate a third phase ST3, an entrance traffic flow F4 passes through the workshop single lane channel AP4, and after the traffic flow F4 operates for the minimum green light time, if the traffic flows F1 and F3 are detected to come, the phase ST3 is ended and the Step1 is executed; if the vehicles of the flows F1 and F3 are not detected, the material vehicle priority request is detected in the flow F4 at the inlet of the passage AP4, the green light time of the phase ST3 is prolonged by unit green light time for X seconds every time the priority is detected, and if the priority request is not continuously detected in the maximum green light time of the flow F4 or the green light time reaches the maximum green light time of the flow F4, the phase ST3 is ended to execute Step1.
2. A signal control method for a single-lane bidirectional passing workshop intersection is characterized in that based on the signal control system for the single-lane bidirectional passing workshop intersection, the signal control method is carried out according to the following steps:
firstly, determining design parameters of an intersection;
secondly, determining the traffic flow characteristics of the single lane and the passage in the workshop;
step C, setting an intersection traffic safety facility system;
d, setting a vehicle passing signal indicating system;
e, laying a vehicle detection system;
step F, determining an intersection control strategy and basic timing;
the intersection control strategy provides a phase switching method and a phase priority method, and the phase switching and phase priority flow comprises the following steps:
step1: the method comprises the steps that a first phase ST1 starts to operate at an intersection, entrance traffic flows F1 and F3 of corridor passages AP1 and AP3 in a workshop pass through, after the minimum green light time of the traffic flows F1 and F3, if the entrance traffic flow F2 of a passage AP2 is detected to come, the phase ST1 finishes executing Step2, otherwise, the phase ST2 is skipped, whether the entrance traffic flow F4 of the passage AP4 comes is detected, if the entrance traffic flow F4 of the AP4 comes is detected, the Step3 is executed, and otherwise, the phase ST3 is skipped, and the Step1 is executed;
the method for determining the minimum green light time comprises the following steps:
GMin(13)＝Max[GMin(1),GMin(3)]
wherein: gMin(i) A minimum green time for traffic flow Fi; dstartiDelay in the start of traffic Fi; di is the average head distance of the traffic flow Fi; vaverageiThe vehicle flow Fi average speed; n is the number of vehicles in the first distribution logistics or the number of average row-to-vehicle;
step2: the method comprises the steps that a second phase ST2 starts to operate at an intersection, an entrance traffic flow F2 passes through a single lane channel AP2 of a workshop, after the traffic flow F2 operates for the minimum green light time, a material vehicle priority request is detected in a subsequent traffic flow F2, the green light time of the phase ST2 is prolonged for a unit green light prolonged time X seconds every time the priority is detected, if the priority request is not continuously detected in the maximum green light time of the traffic flow F2 or the green light time reaches the maximum green light time of the traffic flow F2, the phase ST2 is ended, then whether an entrance traffic flow F4 of the channel AP4 arrives is detected, if the entrance traffic flow F4 of the AP4 arrives, step3 is executed, and if the entrance flow F4 arrives, the phase ST3 is skipped, and Step1 is executed;
the method for determining the vehicle green light extension time X of the vehicle Fi green light comprises the following steps:
X＝w0×Max[Pt,Hi],
or alternatively
Wherein HiThe headway time of the traffic flow Fi; le and Lw are lengths of canalization sections of single-lane inlets AP2 and AP 4; vaverageiThe vehicle flow Fi average speed; p istFor the time w when the vehicle is detected to enter the single lane through the canalized segment0Is a weighting coefficient;
step3: the intersection starts to operate a third phase ST3, an entrance traffic flow F4 passes through the workshop single lane channel AP4, and after the traffic flow F4 operates for the minimum green light time, if the traffic flows F1 and F3 are detected to come, the phase ST3 is ended and the Step1 is executed; if the vehicles F1 and F3 are not detected to come, and a material vehicle priority request is detected in a vehicle flow F4 at the inlet of the access AP4, the green light time of the phase ST3 is prolonged by a unit green light prolonging time X seconds every time priority is detected, and if the priority request is not continuously detected in the maximum green light time of the vehicle flow F4 or the green light time reaches the maximum green light time of the vehicle flow F4, the phase ST3 is ended to execute Step1.
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| CN109935092A (en) * | 2019-04-11 | 2019-06-25 | 昆明理工大学 | A kind of road construction area bicycle road two-way traffic self-adapting signal lamp control system |
| CN110491147B (en) * | 2019-07-05 | 2020-07-31 | 平安国际智慧城市科技股份有限公司 | Traffic information processing method, traffic information processing device and terminal equipment |
| CN111815971A (en) * | 2020-07-21 | 2020-10-23 | 瑞安市惠斯登自动化机械设备有限公司 | Intelligent safety method and device for single-lane bidirectional driving and storage medium |
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