CN106781562A - The whistle control system and method for a kind of bicycle road opposing traffic workshop intersection - Google Patents
The whistle control system and method for a kind of bicycle road opposing traffic workshop intersection Download PDFInfo
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Abstract
The invention belongs to intersection traffic signal control field, more particularly to a kind of bicycle road opposing traffic workshop intersection whistle control system and method.The whistle control system is made up of vehicle detecting system, vehicle pass-through signal designation system, right of way signal control device, the transparent fast rolling door of workshop passage and safety and traffic safety facilities system；The control method is based on the design parameter that the whistle control system determines intersection first, secondly the traffic stream characteristics of bicycle road and workshop internal channel are determined, then the setting of intersection traffic safety devices system is carried out, vehicle pass-through signal designation system is set afterwards and vehicle detecting system is laid, intersection control strategy and timing scheme is finally determined.The present invention proposes a kind of practical, the feasible whistle control system and method that intersect intersection with logistics corridor in workshop towards the bicycle road opposing traffic for passing through workshop, solves the control problem of such 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 an intersection that is not universal is not advocated in the plant planning, some plants still exist where such an intersection is present due to the constraints of the plant site and the environment and the history of the plant planning.
The existing Chinese patent documents CN203038471U single-lane bidirectional traffic signal lamp control device and CN103985259B district single-lane vehicle in-out 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 between 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 the traffic flow organization of the intersection of the single-lane bidirectional traffic passing through the workshop and the logistics channel in the workshop, a practical and feasible control system and method are not available 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 antennas, 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 the material flow passing through the workshop and the maintenance of a highly clean 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 the 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 FIG. 2. The head-hour distance Hi and the unit s of the logistics vehicle in the passage passing direction in the workshop; workshopThe head distance Di of the logistics vehicle in the passing direction of the inner channel 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 laneaverageiIn the unit m/s. The acquisition method of the parameters comprises the following two methods:
1) and (5) performing field traffic investigation, and acquiring and calculating traffic flow characteristic data of the single lane and the passage in the workshop in the traffic direction. 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 cars 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;
the basic guarantee of the operation of a signal control system of a single-lane bidirectional traffic workshop intersection is an intersection safety facility system, as shown in fig. 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 viewpoint distribution and the average speed of the traffic flow of drivers of the traffic flows F1, F2, F3 and F4 and by combining the setting specification of a universal signal lamp, 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 road in the single lane passing direction, and channel blockage caused by accidental occupation of a channel 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 the entrances of the intersections AP1 and AP3 and used for detecting whether vehicle passing demands exist in the vehicle flows F1 and F3. A ground vehicle detection coils E1, ED and ED and an inlet vehicle video detection integrated camera D6 are arranged at the inlet of an intersection AP2, and a ground coil W2 and an outlet vehicle video detection integrated camera D5 are arranged at the outlet of an AP 2. The coil E1 is used for detecting whether a vehicle passing request exists in the AP2 inlet traffic flow F2, collecting the traffic flow Q2 of the traffic flow F2, the headway H2 and the headway distance D2. And 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 end coil. The video detection integrated camera D6 for the inlet vehicle and the video detection integrated camera D5 for the outlet vehicle are used for collecting images of passing vehicles and license plate number data. Ground vehicle detection coils W1, WD and WD and an inlet vehicle video detection integrated camera D3 are arranged at the inlet of an intersection AP4, and a ground coil W1 and an outlet vehicle video detection integrated camera D1 are arranged at the outlet of an AP 4. The coil W1 is used for detecting whether a vehicle passing request exists at the inlet AP4, collecting the traffic flow Q4 of the traffic flow F4, the headway H4 and the headway distance D4. The coils WD and WD are the two-side transparent quick rolling door opening request coils of the workshop, and when the vehicle occupies the coil WD before the vehicle occupies the coil WD, the two-side transparent quick rolling doors are opened. The coil E2 is a channel use end coil. The video detection integrated camera D3 for the inlet vehicle and the video detection integrated camera D1 for the outlet vehicle are used for collecting images of passing vehicles 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 the vehicles entering the single lane are ensured to pass through a workshop corridor and then exit. 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 arranged at the inlet of the AP4, an RFID antenna and RFID reader-writer integrated module D2 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 at the entrances of the AP2 and the AP4 of the single lane, 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
The consistency of the passage of the logistics vehicles in the workshop and the pulling of the workshop is fully considered, and the logistics vehicle flow entering the inlet of the channels AP1 and AP3 in the workshop is determined to have the highest-level priority right of passage based on the fact that the smooth flow of the logistics vehicle 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 entrance 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 single-lane access of AP2 and AP 4.
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 entered through the passages AP1 and AP3 in the workshop are first phase ST1, the logistics vehicle flows F2 and F4 which pass through the single lanes AP2 and AP4 in the workshop are arranged in a phase-splitting mode, the purpose that bidirectional passing is achieved by alternately using the single lanes is achieved, the direction with a large logistics vehicle proportion and a high priority requirement in the F2 and F4 vehicle flows is used as a second phase ST2, and the direction with a small logistics vehicle proportion and a low priority requirement is used as a third phase ST 3. As in fig. 3 (assuming that F2 has a large proportion of cars 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 passing workshop intersection, and provides a phase switching method and a phase priority method, wherein the phase switching and priority flow is shown in FIG. 4.
Step 1: the method comprises the steps of firstly operating a first phase ST1 at the intersection, enabling entrance traffic flows F1 and F3 to pass through corridor passages AP1 and AP3 in a workshop, 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, ending the Step2 in the phase ST1, otherwise skipping the phase ST2, detecting whether the entrance traffic flow F4 of the passage AP4 comes, if the entrance traffic flow F4 of the AP4 is detected to come, executing the Step3, and otherwise, skipping the phase ST3, executing the Step 1.
Step 2: the intersection starts to operate in a second phase ST2, a vehicle flow F2 passes through a workshop single lane passage AP2 at the entrance, and the vehicle flow F2 operates in a minimum green light time Gmin(2) Then, if a material vehicle priority request is detected in the subsequent flow F2, the green time is extended by unit of green time extension X seconds every time priority is detected in the phase ST2, and if the maximum green time G is in the flow F2max(2) In which priority requests are not continuously detected or the green time reaches the maximum green time G of the traffic flow F2max(2) The phase is ended ST2 and then examinedAnd (4) detecting whether the vehicle flow F4 at the inlet of the channel AP4 comes or not, executing Step3 if the vehicle flow F4 at the inlet of the AP4 is detected, and otherwise, skipping the phase ST3 and returning to execute Step 1.
Step 3: the third phase ST3 starts to operate at the intersection, the vehicle flow F4 passes through the single lane passage AP4 of the workshop, and the minimum green light time G of the vehicle flow F4min(4) Then, if the arrival of the traffic flows F1 and F3 is detected, the end phase ST3 returns to Step 1; if the incoming vehicles of the traffic flows F1 and F3 are not detected, and the material vehicle priority request is detected in the traffic flow F4 at the inlet of the access passage AP4, the green light time of the phase ST3 is prolonged by the unit green light prolonged time X seconds every time the priority is detected, and if the maximum green light time G of the traffic flow F4 is detectedmax(4) In which priority requests are not continuously detected or the green time reaches the maximum green time G of the traffic flow F4max(4) The end phase ST3 executes Step 1.
Preferably, the method for determining the minimum green time is as follows:
wherein:a minimum green time for traffic flow Fi;the start delay of the traffic flow Fi is generally 5s, and can be obtained by investigation;average head spacing of the traffic flow Fi;is traffic 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 AP 4;the vehicle flow Fi average speed;for the time when a vehicle is driven into a single lane from being detected to passing through a channeling sectionAre weighting coefficients.
Preferably, the maximum green time determination 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 ST 2;clearing the full red time for phase ST 3;taking a value of 3 seconds for the yellow light time; le and Lw are lengths of entrance canalization sections 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 periodIs 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 by the AP1 and the AP3 inlet traffic flows F1 and F3 in the workshop basically has the metronomic property, and in order to ensure that the phase ST1 with the highest priority level meets the requirements of logistics vehicle passing right and delivery beat of the production logistics vehicle(unit: minute) coincidence, when the intersection signal control phase sequence scheme operates the phase ST2 or the phase ST3 and the phase ST2 and the phase ST3 of the traffic flow crossing the single lane based on the signal control strategy,the maximum signal period is required to ensure that AP1 and AP3 inlet traffic flows F1 and F3 in a workshop pass through the intersection according to the delivery beat required by daily production. Maximum signal period () According to delivery beatDetermining:
（1）
（2）
（3）
（4）
wherein,minimum green time for phase ST 1;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;clearing the full red time for phase ST 2;clearing the full red time for phase ST 3;taking a value of 3 seconds for the yellow light time; le and Lw are lengths of entrance canalization sections 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 normally turning on a 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 signal 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. integrated cameras; d2, D5.RFID reader and RFID antenna integrated device;a vehicle-mounted RFID card; s1, S3, S5 and S7. signal lamp; s2, S4, S6 and S8.LED character prompt screen; m1, M2. a transparent quick rolling door of a workshop passageway; TS1, a ground straight line indicating marking line; TS2. road central safety isolation column; TS3, decelerating ridges; TS4, the ground prohibits parking the netted marking; NN, SS, E1, E2, ED, W1, W2, WD, wd. vehicle detection coils.
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 traffic workshop intersection comprise a signal control system for a single-lane bidirectional traffic workshop intersection and a control method based on the signal control system.
A signal control system for 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 (R) (D2, D5)) Constitute the vehicle detecting system of priority commodity circulation. The vehicle detector (B2) is electrically connected with 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 integration 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 traffic 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 a traffic 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 transparent quick-rolling doors (M1, M2) for the workshop passage are used for keeping a clean production environment in a workshop, the opening of the doors is controlled by a detection coil (ED, ED, WD, WD) triggered by a door entrance request and 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 (TS 1), a road central safety isolation column (TS 2), a speed-reducing ridge (TS 3) and a ground no-parking mesh marking (TS 4).
A signal control method for a single-lane bidirectional passing workshop intersection is characterized in that the intersection traffic flow is controlled based on the signal control system (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 laneThe length LL of a single lane in the 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 head distance Di of a logistics vehicle in the passage passing direction in the workshop is unit m; the passing direction corresponds to the two flow directions F1 and F3 in fig. 2. Average speed of traffic flow in a single laneIn 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 |
| Distance D, m between two heads | 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 system includes a ground straight indicator (TS 1), a road center safety isolation pillar (TS 2), a decelerating ridge (TS 3), and a ground no-parking mesh (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) and four-side LED text prompt screens (S2, S4, S6, S8) electrically connected to the output end of the traffic signal control device (B1).
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 vehicle passing demands exist in the vehicle flows F1 and F3 or not; the method comprises the following steps that ground vehicle detection coils E1, ED and ED and an inlet vehicle video detection integrated camera D6 are arranged at an inlet of an intersection AP2, and a ground coil W2 and an outlet vehicle video detection integrated camera D5 are arranged at an outlet of an AP 2; the coil E1 is used for detecting whether a vehicle passing request exists in the AP2 inlet traffic flow F2, collecting the traffic flow Q2 of the traffic flow F2, the headway H2 and the headway distance D2. 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 inlet vehicle and the video detection integrated camera D5 for the outlet vehicle are used for collecting images of passing vehicles and license plate number data; ground vehicle detection coils W1, WD and WD and an inlet vehicle video detection integrated camera D3 are arranged at the inlet of an intersection AP4, and a ground coil W1 and an outlet vehicle video detection integrated camera D1 are arranged at the outlet of an AP 4. The coil W1 is used for detecting whether a vehicle passing request exists in an inlet AP4 traffic flow F4, collecting a traffic flow Q4 of the traffic flow F4, a vehicle headway H4 and a vehicle headway distance D4; 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 video detection integrated camera D3 for the inlet vehicle and the video detection integrated camera D1 for the outlet vehicle are used for collecting images of passing vehicles 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 the vehicles entering the single lane are ensured to pass through a workshop corridor and then exit. 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 preferential 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 arranged at the inlet of the AP4, an RFID antenna and RFID reader-writer integrated module D2 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 and AP4, 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 AP1 and AP2 entrance lane flows F1 and F3 have the highest level priority right of passage, the AP2 entrance lane flow F2 is 15veh/h, the ratio of 20% of logistics vehicles is higher than that of the AP3 entrance lane flow F4, the flow F2 is the second level priority right of passage, and the vehicle-mounted RFID request detection is adopted for priority. Flow F4 has lowest level priority.
2) Intersection signal phase sequence determination
As shown in fig. 3, in this embodiment, the intersection workshop internal passage AP1, AP3 import traffic flows F1, F3 arrange the synchronous straight-going time right as the first phase ST 1; the AP2 inlet traffic flow F2 firstly uses single lane traffic, and is the second phase ST 2; the AP4 inlet traffic flow F4 is arranged as a third phase ST 3.
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.
Step 1: 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 green, the LED character prompt screens S2 and S6 display that the vehicle is ready to pass, and the traffic flows F1 and F3 pass through the intersection. Phase ST1 minimum green time of operationIn the present embodiment, the first and second electrodes,comprises the following steps:
。；after the vehicle detection system operates for 29S, if the vehicle detection system detects that a vehicle occupies a coil E1 in a vehicle flow F2 through a ground vehicle detection coil E1 at an entrance of AP2, a signal lamp S1 and a signal lamp S5 turn yellow (Y = 3S) to turn red, an LED character prompt screen S2 and a signal lamp S6 display that waiting is required, and a Step2 is executed after a phase ST1 is finished; if the vehicle detection system passes the APWhen the 2-entrance-lane ground vehicle detection coil E1 detects that the vehicle flow F2 has no vehicle occupancy coil E1, the phase ST2 is skipped, and when the vehicle detection system detects that the vehicle flow F4 has the vehicle through the AP 4-entrance-lane ground vehicle detection coil W1, the Step3 is executed, otherwise, the Step1 is executed by skipping the phase ST 3.
Step 2: the second phase ST2 starts to operate at the intersection, a signal lamp S7 lights a green light, an LED text prompt screen S8 displays that the vehicle please pass, transparent quick rolling doors M1 and M2 are in a state of being capable of being opened, a traffic flow F2 runs to the west by using a single lane, a camera D6 at the entrance collects traffic flow images and license plate data, after the vehicle occupies a coil ED and then occupies a coil ED in the traffic flow, the transparent quick rolling doors M1 and M2 are rolled up and opened, the traffic flow F2 passes through the workshop, a camera D1 at the exit collects the traffic flow images and the license plate data, and a coil E2 at the exit records the number of passing vehicles. Stream F2 minimum Green time of operationIn the present embodiment, the first and second electrodes,comprises the following steps:
17s；
after the operation is finished, when the priority material vehicle detection system D5 detects that a priority vehicle with a vehicle-mounted RFID arrives in the F2 subsequent traffic flow, the phase ST2 green light time is extended by the unit green light extension time X seconds every time 1 time is detected, in this embodiment, the priority material vehicle detection system D5 detects that a priority vehicle with a vehicle-mounted RFID arrives，1.5If the maximum green time is in the flow F2After the green light of the inner unit is prolonged by X seconds, D5 does not continuously detect the priority vehicle request provided with the vehicle-mounted RFID or the time length of the green light time reaching the maximum green light time of the traffic flow F2If the signal lamp S7 turns to yellow (Y =3 seconds), the red lamp is turned on, and the LED text prompt screen S8 displays a wait signal, ending the phase ST 2. In this embodiment, first confirm=，=Analyzed by investigationThe time is 2 minutes and the time is 2 minutes,then calculating the maximum green timeComprises the following steps:
(ii) a After the phase ST2 ends, Step3 is executed if the AP4 entrance vehicle detection coil W1 detects an incoming vehicle flow F4, otherwise Step1 is executed in return.
Step 3: the third phase ST3 starts to operate at the intersection, a signal lamp S3 lights a green light, an LED text prompt screen S4 displays that the vehicle please pass, transparent quick rolling doors M1 and M2 are in a state of being capable of being opened, a traffic flow F4 runs to the east by using a single lane, a camera D3 at the entrance collects traffic flow images and license plate data, after the vehicle in the traffic flow occupies a coil WD and then occupies a coil WD, the transparent quick rolling doors M1 and M2 are rolled up and opened, the traffic flow F4 passes through the workshop, a camera D4 at the exit collects the traffic flow images and the license plate data, and a coil W2 at the exit records the number of passing vehicles. Stream F4 minimum Green time of operationIn the present embodiment, the first and second electrodes,comprises the following steps:
，17s；
after the operation is finished, if the AP1 entrance vehicle detection coil NN or the AP3 entrance vehicle coil SS detects the coming vehicle flows F1 and F3, the end phase ST3 returns to execute Step 1; if the incoming traffic of the traffic flows F1 and F3 is not detected, the priority request in the traffic flow F4 is continuously detected, and when the priority logistics vehicle detection D2 detects that a priority vehicle with an on-vehicle RFID installed in the subsequent traffic flow of the F4 arrives, the phase ST3 is green for every 1 time of detectionThe unit green light extension time is X seconds, in this embodiment，1.5If the maximum green time is in the flow F4After the green light of the inner unit is prolonged by X seconds, D2 does not continuously detect the priority vehicle request provided with the vehicle-mounted RFID or the green light time reaches the maximum green light time duration of the traffic flow F4If the signal lamp S3 turns green to yellow (Y =3 seconds), then it turns red, and the LED text prompt screen S4 displays a wait, then the phase ST3 is ended, and the process returns to Step 1. In this embodiment, first, the determination is made=，=Analyzed by investigationIs for 2 minutesThen calculating the maximum green timeComprises 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 (4)
1. A signal control system for 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 transparent quick rolling door of a workshop passage and a traffic safety facility system.
2. The control system according to claim 1, characterized in that the vehicle detection system comprises a conventional vehicle detection system consisting of a vehicle detector (B2), detection coils (E1, E2, ED, W1, W2, WD), consisting ofAn RFID detection host (B3), an RFID reader-writer and RFID antenna integrated device (D2, D5), and a vehicle-mounted RFID card (R)1-n) The vehicle detection system for the priority material is formed; the vehicle detector (B2) is electrically connected with detection coils (E1, E2, ED, ED, W1, W2, WD and WD), the RFID detection host machine (B3) is electrically connected with the RFID reader-writer and RFID antenna integration devices (D2 and D5), and the vehicle detector (B2) and the RFID detection host machine (B3) are electrically connected with a vehicle detection system in the traffic signal control device (B1); the vehicle traffic 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 a traffic 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 transparent quick-rolling doors (M1, M2) for the workshop passage are used for keeping a clean production environment in a workshop, the opening of the doors is controlled by a detection coil (ED, ED, WD, WD) triggered by a door entrance request and 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 (TS 1), a road central safety isolation column (TS 2), a speed-reducing ridge (TS 3) and a ground no-parking mesh marking (TS 4).
3. 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;
and F, determining an intersection control strategy and basic timing.
4. The control method according to claim 3, wherein the control strategy in step F provides a phase switching method and a phase priority method, and the phase switching and phase priority procedure is as follows:
step 1: the method comprises the steps that a first phase ST1 is started to operate at an intersection, after corridor passages AP1 and AP3 in a workshop pass through F1 and F3, after traffic flows F1 and F3 pass through the minimum green light time, 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, whether the entrance traffic flow F4 of the passage AP4 comes is detected, if the entrance traffic flow F4 of the passage AP4 is detected to come, Step3 is executed, and otherwise, the phase ST3 is skipped, and Step1 is executed;
step 2: the method comprises the steps that a second phase ST2 starts to operate at an intersection, a vehicle flow F2 passes through a single-lane passage AP2 of a workshop, after the vehicle flow F2 operates for the minimum green light time, a material vehicle priority request is detected in a subsequent vehicle flow F2, every time the priority is detected, the green light time of a phase ST2 is prolonged by the unit green light prolonging time X seconds, if the priority request is not continuously detected in the maximum green light time of the vehicle flow F2 or the green light time reaches the maximum green light time of the vehicle flow F2, the phase ST2 is ended, whether a vehicle comes from the passage AP4 and the vehicle flow F4 comes is detected, if the vehicle comes from the F4 passage AP4, Step3 is executed, and if the phase ST3 is skipped, Step1 is executed;
step 3: the intersection starts to operate a third phase ST3, a vehicle flow F4 passes through a workshop single lane channel AP4 at the entrance, after the vehicle flow F4 operates for the minimum green time, if the vehicle flows F1 and F3 are detected to come, the phase ST3 is ended, and the Step1 is executed; if the arrival of the traffic flows F1 and F3 is not detected, and a material vehicle priority request is detected in the traffic flow F4 at the inlet of the access passage AP4, the green light time of the phase ST3 is prolonged by the unit green light prolonged time 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 traffic flow F4 or the green light time reaches the maximum green light time of the traffic flow F4, the phase ST3 is ended to execute Step 1.
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