CN106781562B - Signal control system and method for single-lane bidirectional passing workshop intersection - Google Patents

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

A signal control system and method for a single-lane two-way traffic workshop intersection

technical field

The invention belongs to the field of traffic signal control at intersections, in particular to a signal control system and method for a single-lane two-way traffic workshop intersection.

Background technique

The current intersection signal control system and method can control various intersections formed by the intersection of two-way roads, intersections formed by the intersection of one-way roads and two-way roads, and intersections formed by the intersection of one-way roads and one-way roads, and are not suitable for crossing workshops. An intersection formed by a single lane that can only pass through a single direction of traffic at a time, but requires alternate two-way traffic, and a two-way passage for logistics vehicles in the workshop. Although such non-universal intersections are not advocated in workshop planning, such intersections still exist in some factory areas due to workshop land and environmental constraints and historical reasons for workshop planning.

Existing Chinese patent documents CN203038471U single-lane two-way traffic signal light control device and CN103985259B community single-lane vehicle entry and exit warning system all only relate to single-lane two-way traffic channel control device, do not involve intersection control system, all can not solve the problem facing crossing workshops. The above-mentioned patent documents do not involve specific control methods for the signal control at the intersection of single-lane two-way traffic and the logistics channel in the workshop; At present, there is still a lack of a practical and feasible control system and method. At present, the manual on-site command of traffic flow requires the cooperation of multiple management personnel, which leads to high intersection management costs, low management efficiency, and unsmooth intersections.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a signal control system and method for a single-lane two-way traffic workshop intersection.

In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve:

A signal control system for a single-lane two-way traffic workshop intersection, which is characterized in that it includes a vehicle detection system, a vehicle traffic signal indication system, a traffic signal control device, a transparent fast rolling door for a workshop channel, 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 includes a vehicle detector, 4 sets of vehicle use channel request coils and 2 sets of imported video detection integrated cameras, 2 sets of channel passing direction detection coils, 2 sets of door opening request detection coils, 2 sets of channel use end detection coils and 2 sets of An integrated video detection camera at the exit; the detection coil and the integrated video detection camera are connected to the vehicle detector, and the vehicle detector is connected to the vehicle detection system. The priority material vehicle detection system includes a detection host, 2 sets of RFID antennas, 2 sets of RFID readers, and vehicle-mounted RFID. The RFID antenna and the RFID reader are integrated devices and are electrically connected to the detection host, and both the vehicle detector and the detection host are electrically connected to the vehicle detection system located in the signal control device.

The vehicle passage signal indicating system is composed of 4 sets of red, yellow and green light panels consisting of signal lights and 4 sets of LED text prompt screens.

The passage signal control device is a road traffic signal control machine, which is characterized in that the control strategy proposed by the present invention is built in, its input end is connected to the vehicle detection system, and its output end is connected to the vehicle passage signal indication system .

The transparent fast rolling door for the workshop passage is used to solve the contradiction between the flow of materials passing through the workshop and maintaining a highly clean production environment in the workshop, and is a safe and reliable partition method that shortens the time for vehicles passing through the workshop. Its opening is controlled by the door entry request trigger coil, and is linked with the corresponding vehicle passage signal indicating device.

The traffic safety facility system is composed of straight-going indicator markings on the ground, safety isolation columns in the middle of the road, deceleration ridges, and mesh markings prohibiting parking on the ground, which are used to clarify the right of way of vehicles.

A single-lane two-way traffic vehicle intersection signal control method is characterized in that, based on the single-lane two-way traffic vehicle traffic signal control system, the following steps are carried out.

Step A: first determine the design parameters of the intersection;

Here, the design parameters of the intersection include: the lengths Le and Lw of the entrance channelization sections on both sides of the single lane, the lengths of both ends of the single lane L _et and L _wt , and the length LL of the single lane in the workshop; the methods for obtaining these parameters include the following two:

1) On-site investigation and measurement to obtain intersection design parameters. As shown in Figure 2, use the rangefinder to measure the lengths Le and Lw of the channelized sections of the entrances on both sides of the single lane, the lengths of both ends of the single lane L _et and L _wt , and the length LL of the single lane in the workshop;

2) Collect and consult the intersection design drawings, and directly obtain the design parameters of the intersection.

Step B: secondly determine the traffic flow characteristics of the single lane and the passage in the workshop;

The traffic flow characteristics here include five parameters: the traffic flow Qi in each direction of passage, unit: veh/h; the proportion of logistics vehicles Pi in each direction of passage, unit: %; 4 traffic flow directions. The headway distance of logistics vehicles in the direction of passage in the workshop Hi, unit s; the distance between the heads of logistics vehicles in the direction of passage in the workshop Di, unit m; the direction of passage corresponds to the two flow directions F1 and F3 in Figure 2. The average speed V _averagei of the traffic flow in the single lane, the unit is m/s. There are two ways to obtain these parameters:

1) On-site traffic survey, to obtain and calculate traffic flow characteristics data in the direction of passage of single lanes and workshop passages. This method is aimed at the intersection that has been upgraded to a signal-controlled intersection that has been manually commanded and managed. It investigates the total number of vehicles passing through the intersection in each direction of traffic and the number of logistics vehicles passing in each direction during peak hours, and uses the data obtained from the investigation to calculate the intersection. The traffic flow Qi in each direction of passage at the entrance, the proportion Pi of logistics vehicles in each direction of passage; investigate the headway Hi and distance Di of logistics vehicles in the direction of passage in the workshop; investigate the average passing time of vehicles in the single lane, and use the data obtained from the investigation to calculate The average speed V _averagei of the traffic flow in the single lane;

2) Analyze and predict, and directly determine the traffic flow characteristics of single lanes and workshop passages. This method is aimed at the signal control of newly built intersections. In the planning and design stage, the traffic demand of the intersection is fully considered, and the traffic flow Qi in each direction of the intersection is obtained, the proportion of logistics vehicles in each direction Pi, and the logistics volume in the direction of the passage in the workshop. Headway Hi and headway Di, average speed V _averagei of traffic flow in single lane.

Step C: then the intersection traffic safety facility system is set;

The basic guarantee for the operation of a one-lane two-way traffic workshop intersection signal control system is the intersection safety facility system. As shown in Figure 2, there are four entrances at the intersection, AP1, AP2, AP3, and AP4. The demand has been channelized, and there are four traffic flows of F1, F2, F3, and F4. A feature of this invention is that the channelization design is carried out on the single lane, and each end of the single lane is set as an entry request area and an exit area, and a central separation column is set between the entry request area and the exit area, and the ground is planned to go straight Direction marking markings. Partially set up no-parking mesh markings in the single-lane workshop, and set up deceleration ridges in front of the transparent fast-rolling doors on both sides of the workshop.

Step D: set the vehicle traffic signal indicating system;

According to the driver's viewpoint distribution and the average speed of the traffic flow F1, F2, F3, F4, combined with the general signal light setting specifications, the four sets of signal lights are composed of three arrow light panels with upper red, middle yellow and lower green, and are installed vertically. Figure 2. A main feature of the present invention is that signal lamps and text prompt screens are set in the entry request area at both ends of the single lane, and the signal lamps and text screens are linked. The text prompt screen synchronously displays text information to further clarify the right of way in the direction of single-lane traffic, so as to avoid channel blockage caused by accidental occupancy of the workshop channel when single-lane lanes are used alternately.

Step E: deploy vehicle detection system;

In order to implement the signal control strategy, a vehicle detection system consisting of a conventional vehicle detection system and a priority logistics vehicle detection system is set at the intersection, as shown in Figure 2. The conventional vehicle detection system includes: vehicle detector B2; ground vehicle detection coils NN and SS are installed at the entrances of intersections AP1 and AP3 to detect whether there is a vehicle traffic demand for traffic flow F1 and F3. Set ground vehicle detection coils E1, ed, ED and integrated camera D6 for video detection of imported vehicles at the entrance of intersection AP2, and set ground coil W2 and integrated camera D5 for video detection of exit vehicles at the exit of AP2. The coil E1 is used to detect whether there is a vehicle passage request for the incoming traffic flow F2 of AP2, and to collect the traffic flow Q2 of the traffic flow F2, the time headway H2, and the headway distance D2. The coils ED and ed are request coils for opening the double-sided transparent fast rolling doors of the workshop. When the vehicle first occupies the coil ED and then occupies the coil ed, the double-sided transparent fast rolling doors are opened. The coil W2 is a channel usage end coil. The imported vehicle video detection integrated camera D6 and the exported vehicle video detection integrated camera D5 are used to collect passing vehicle images and license plate number data. Set ground vehicle detection coils W1, wd, WD and integrated camera D3 for video detection of imported vehicles at the entrance of intersection AP4, and set ground coil W1 and integrated camera D1 for video detection of exit vehicles at the exit of AP4. The coil W1 is used to detect whether there is a vehicle passing request at the entrance AP4, and to collect the traffic flow Q4 of the vehicle flow F4, the time headway H4, and the headway distance D4. The coils WD and wd are request coils for opening the double-sided transparent fast rolling doors of the workshop. When the vehicle first occupies the coil WD and then occupies the coil wd, the double-sided transparent fast rolling doors are opened. The coil E2 is a channel use end coil. The imported vehicle video detection integrated camera D3 and the exported vehicle video detection integrated camera D1 are used to collect passing vehicle images and license plate number data. By comparing whether the license plate number data collected by cameras D6 and D1, D3 and D5 are consistent, it is judged whether there is a vehicle passing in the single lane, so as to ensure that the vehicles entering the single lane pass through the workshop corridor and then drive out. When the vehicle detection system determines that the single-lane vehicle has been used, and the door self-detection system detects that the vehicle has passed through completely, the door will drop and close

The priority logistics vehicle inspection system includes the RFID antenna and RFID reader integration device D7 installed at the entrance of AP2, the RFID detection host B2, the RFID antenna and RFID reader integration module D2 installed at the entrance of AP4, and the integrated module D2 installed on the logistics vehicle. Vehicle RFID card. The priority logistics vehicle detection system is used to detect the logistics vehicles that require priority passage at the AP2 entrance and AP4 entrance of the single lane, and transmit the priority request to the vehicle detection system in the traffic signal control device.

Step F: Determine the intersection control strategy and basic timing.

1) Determination of vehicle traffic priority

The present invention fully considers the consistency between the passage of logistics vehicles in the workshop and the pull of production in the workshop, and based on the fact that the smooth flow of logistics vehicles is the key requirement for the continuous production process, it is determined that the flow of logistics vehicles in the passages AP1 and AP3 in the workshop has the highest priority right of way; for Logistics vehicles passing through the workshop using the single-lane AP2 and AP4 entrance lanes have the second-level right of way, and the second-level priority adopts the way of request priority; other vehicles passing through the workshop using the single-lane AP2 and AP4 entrances have the lowest level of passage right.

2) Determination of the phase sequence of the signal at the intersection

Based on the priority level of vehicles and the traffic conditions at the intersection, the flow of logistics vehicles F1 and F3 passing through the passages AP1 and AP3 in the workshop is the first phase ST1, and the flow of F2 and F4 passing through the single lanes of the workshop AP2 and AP4 is set in phases to meet the requirement of alternating Two-way traffic is realized by using a single lane, and the direction with a large proportion of logistics vehicles and high priority demand in the F2 and F4 traffic flows is the second phase ST2, and the direction with a small proportion of logistics vehicles and the second priority demand is the third phase ST3. As shown in Figure 3 (here, it is assumed that the proportion of F2 logistics vehicles is large and the priority demand is high).

3) Determination of signal control strategy

Based on the intersection signal phase sequence scheme, the present invention proposes a signal control strategy for a single-lane two-way traffic workshop intersection, and provides a phase switching method and a phase priority method. The phase switching and priority flow are shown in Figure 4 .

Step1: The first phase ST1 starts to run at the intersection, and the entrance traffic flow F1 and F3 of the corridor passage AP1 and AP3 in the workshop pass through. After the minimum green light time for the traffic flow F1 and F3 to pass, if the entrance traffic flow F2 of the passage AP2 is detected, the phase ST1 ends Execute Step2, otherwise skip phase ST2 and then check whether the incoming traffic flow F4 of channel AP4 is coming. If it detects incoming traffic flow F4 at AP4, execute Step3, otherwise skip phase ST3 and execute Step1.

Step2: The intersection starts to run the second phase ST2, crossing the single-lane passage AP2 of the workshop, the entrance traffic flow F2 passes through, and after the traffic flow F2 runs the minimum green light time G _min (2), it is detected that there is a priority request for material vehicles in the subsequent traffic flow F2, then every measured One-time priority, phase ST2 green light time extension unit green light extension time X seconds, if no priority request is continuously detected within the maximum green light time G _max (2) of traffic flow F2 or the green light time reaches the maximum green light time G _max (2) of traffic flow F2, it will end Phase ST2, and then detect whether the traffic flow F4 at the entrance of channel AP4 is coming. If it is detected that the traffic flow at the entrance F4 of AP4 is coming, then execute Step3, otherwise skip phase ST3 and return to Step1.

Step3: The third phase ST3 starts to run at the intersection, crossing the single-lane passage AP4 of the workshop, the entrance traffic flow F4 passes, and the traffic flow F4 runs for the minimum green light time G _min (4), if the traffic flow F1 and F3 are detected, the phase ST3 ends and returns to Step1 ; If no traffic flow F1 and F3 are detected, and there is a priority request for material vehicles in the entrance traffic flow F4 of the channel AP4, then each time the priority is measured, the green light time of phase ST3 is extended by the unit of green light extension time X seconds. If the priority request is not continuously detected within the green light time G _max (4) or the green light time reaches the maximum green light time G _max (4) of the traffic flow F4, the phase ST3 ends and Step1 is executed.

Preferably, the determination method of the minimum green light time is as follows:

为车流Fi最小绿灯时间；

车流Fi启动延误，一般取值为5s，也可调查获得；

为车流Fi平均车头间距；

为车流Fi平均速度；N为一次配送物流车辆数或平均排队车辆数。in:

is the minimum green light time for the traffic flow Fi;

The start delay of the traffic flow Fi, which is generally set at 5s, can also be obtained through investigation;

is the average headway distance of the traffic flow Fi;

is the average speed of the traffic flow Fi; N is the number of logistics vehicles for a distribution or the average number of queuing vehicles.

Preferably, the determination method of the green light extension time X of the green light of the traffic flow Fi is as follows:

，

,

为车流Fi的车头时距；

为单车道进口AP2、AP4渠化段长度；

为车流Fi平均速度；

为车辆从被检测到通过渠化段驶入单车道的时间

为加权系数。in,

is the headway of the traffic flow Fi;

is the length of the channelized section of AP2 and AP4 at the single-lane entrance;

is the average speed of the traffic flow Fi;

is the time from when the vehicle is detected to enter the single lane through the channelized section

is the weighting coefficient.

Preferably, the method for determining the maximum green light time is as follows:

，

,

为车流Fi最大绿灯时间；

为相位ST2清空全红时间；

为相位ST3清空全红时间；

为黄灯时间，按3秒取值；Le、Lw为单车道两侧入口渠化段长度；

为单车道两端长度；LL为车间内单车道长度；

最大信号周期。in:

is the maximum green light time for the traffic flow Fi;

Clear full red time for phase ST2;

Clear all red time for phase ST3;

is the time of the yellow light, which is taken as 3 seconds; Le and Lw are the lengths of the channelized sections at the entrances on both sides of the single lane;

is the length of both ends of the single lane; LL is the length of the single lane in the workshop;

Maximum signal period.

的确定4) Maximum signal period

determination of

（单位：分钟）相一致，基于所述信号控制策略，当交叉口信号控制相位相序方案运行穿越单车道车流的相位ST2或相位ST3以及相位ST2和相位ST3时，需要通过最大信号周期保障车间内AP1、AP3进口车流F1、F3按日常生产所需配送节拍通过路口。最大信号周期（

）按照配送节拍

确定：Based on the signal control strategy in Figure 4, although the cycle time constraints of traditional signal control are not required, since the flow of logistics vehicles F1 and F3 from AP1 and AP3 in the workshop through the intersection is basically rhythmic, in order to ensure the phase ST1 with the highest priority Satisfy the right of way of logistics vehicles and the delivery rhythm of production logistics vehicles

(Unit: minute) Consistent, based on the signal control strategy, when the intersection signal control phase sequence scheme runs phase ST2 or phase ST3 and phase ST2 and phase ST3 crossing single-lane traffic flow, it is necessary to ensure the workshop through the maximum signal cycle The imported traffic flow F1 and F3 of AP1 and AP3 pass through the intersection according to the distribution rhythm required by daily production. Maximum signal period (

) according to delivery beat

Sure:

（1）

(1)

（2）

(2)

（3）

(3)

（4）

(4)

为相位ST1最小绿灯时间；

物流车辆配送间隔，单位：分钟；

分别为相位ST2、相位ST3最大绿灯时间；

为相位ST2清空全红时间；

为相位ST3清空全红时间；

为黄灯时间，按3秒取值；Le、Lw为单车道两侧入口渠化段长度；

为单车道两端长度；LL为车间内单车道长度；in,

is the minimum green light time of phase ST1;

Logistics vehicle distribution interval, unit: minute;

Respectively, phase ST2, phase ST3 maximum green light time;

Clear full red time for phase ST2;

Clear all red time for phase ST3;

is the time of the yellow light, which is taken as 3 seconds; Le and Lw are the lengths of the channelized sections at the entrances on both sides of the single lane;

is the length of both ends of the single lane; LL is the length of the single lane in the workshop;

。Based on the signal control strategy, when the intersection signal control phase sequence scheme does not operate the phase ST2 and phase ST3 of crossing single-lane traffic flow, it is equivalent to the constant green light of phase ST1, and does not use the determined maximum signal cycle

.

Beneficial effects of the present invention:

1) Compared with traditional intersection signal control, a signal control system and method for a single-lane two-way traffic workshop intersection proposed by the present invention can solve the signal control problem of this special intersection;

2) The invention solves the priority control of logistics vehicles under the single-lane two-way traffic control strategy, ensuring the continuity of the workshop production process;

3) The present invention sets transparent fast rolling doors across both sides of the workshop passage, and the opening and closing of the doors are synchronized with the signal control, which solves the contradiction between the rapid flow of materials across the workshop and the maintenance of a highly clean production environment in the workshop.

Description of drawings:

Fig. 1 is the composition of intersection schematic diagram and signal control system of the present invention;

Fig. 2 is a schematic diagram of design parameter of intersection signal control of the present invention;

Fig. 3 is a schematic diagram of the signal phase sequence scheme of the present invention;

Fig. 4 is the flow chart of realizing the signal control strategy of the present invention;

Fig. 5 is the overall flowchart of the inventive method;

.车载RFID卡；S1、S3、S5、S7.信号灯；S2、S4、S6、S8.LED文字提示屏；M1、M2.车间通道透明快卷门；TS1.地面直行指示标线；TS2.道路中央安全隔离柱；TS3.减速垄；TS4.地面禁止停车网状标线；NN、SS、E1、E2、ED、ed、W1、W2、WD、wd.车辆检测线圈。Among them: B1. Traffic signal control device; B2. Vehicle detector; B3. RFID detection host; D1, D3, D4, D6. Integrated camera; D2, D5. RFID reader and RFID antenna integration device;

.Vehicle RFID card; S1, S3, S5, S7. Signal lights; S2, S4, S6, S8. LED text prompt screen; M1, M2. Transparent fast rolling door for workshop passage; TS1. Straight line on the ground; TS2. Road Central safety isolation column; TS3. Deceleration ridge; TS4. No parking mesh marking on the ground; NN, SS, E1, E2, ED, ed, W1, W2, WD, wd. Vehicle detection coils.

Detailed ways:

The present invention will be further described below in conjunction with accompanying drawing. A signal control system and method for a single-lane two-way vehicle-vehicle intersection includes a signal control system for a single-lane two-way vehicle-vehicle intersection and a control method based on the signal control system.

A signal control system for a single-lane two-way traffic workshop intersection, which is characterized in that it includes a vehicle detection system, a vehicle traffic signal indication system, a traffic signal control device, a transparent fast rolling door for a workshop channel, and a traffic safety facility system.

Combined with Figure 1.

)组成的优先物流车辆检测系统。所述车辆检测器（B2）与检测线圈（NN、SS、E1、E2、ED、ed、W1、W2、WD、wd）电连接，所述RFID检测主机(B3)与RFID读写器与RFID天线集成装置（D2、D5）电连接，所述车辆检测器（B2）和RFID检测主机(B3)与位于通行信号控制装置（B1）内的车辆检测系统电连接，所述车辆检测系统连接于通行信号控制装置（B1）的输入端。The vehicle detection system includes a conventional vehicle detection system composed of a vehicle detector (B2), detection coils (NN, SS, E1, E2, ED, ed, W1, W2, WD, wd) and an RFID detection host (B3 ), RFID reader and RFID antenna integration device (D2, D5), vehicle-mounted RFID (

) composed of priority logistics vehicle detection system. The vehicle detector (B2) is electrically connected to the detection coils (NN, SS, E1, E2, ED, ed, W1, W2, WD, wd), and the RFID detection host (B3) is connected to the RFID reader and RFID The antenna integration device (D2, D5) is electrically connected, the vehicle detector (B2) and the RFID detection host (B3) are electrically connected to the vehicle detection system located in the traffic signal control device (B1), and the vehicle detection system is connected to Input terminal of the traffic signal control device (B1).

The vehicle passage signal indicating system is composed of signal lamps (S1, S3, S5, S7) and LED text prompt screens (S2, S4, S6, S8) electrically connected to the output end of the passage signal control device (B1).

The traffic signal control device (B1) is a road traffic signal control machine, which is characterized in that the control strategy proposed by the present invention is built in, its input terminal is connected to the vehicle detection system, and its output terminal is connected to the vehicle traffic signal control system. Signaling system.

The transparent fast rolling doors (M1, M2) of the workshop passage are used to maintain a clean production environment in the workshop. The opening is controlled by the detection coils (ED, ed, WD, wd) triggered by the door entry request, and is connected with the corresponding traffic lights ( S3, S7) linkage to realize opening; when the vehicle detection system detects that there is no vehicle passing through the single lane of the workshop according to the collected data, the door falls and closes.

The traffic safety facility system includes the straight line on the ground (TS1), the safety isolation column in the middle of the road (TS2), the deceleration ridge (TS3), and the mesh marking line for prohibiting parking on the ground (TS4).

A signal control method for a single-lane two-way traffic workshop intersection, characterized in that, based on the above-mentioned signal control system (Figure 1), according to the steps given in Figure 5 and the implementation process of the signal control strategy shown in Figure 4, the traffic flow at the intersection is controlled. control. The present invention is described by taking the intersection of workshops of an enterprise in Yantai as an example, and the schematic diagram of the intersection design is shown in Figure 2 .

Proceed as follows.

、车间内单车道长度LL；本实施例中，采用现场测量图2中的设计参数，Le=Lw=8米，Let=Lwt=6米，LL=12米。Step A: first determine the design parameters of the intersection; specifically include the intersection: lengths Le and Lw of the entrance channelization section on both sides of the single-lane, lengths of both ends of the single-lane

, Single-lane length LL in the workshop; In the present embodiment, adopt the design parameter in the field measurement Fig. 2, Le=Lw=8 meters, Let=Lwt=6 meters, LL=12 meters.

,单位m/s；本实施例中，经过调查得到交叉口交通流特性以下数据：Step B: Next, determine the traffic flow characteristics of the single lane and the passage in the workshop; specifically include the intersection: the traffic flow Qi in each direction of traffic, unit: veh/h; the proportion of logistics vehicles Pi in each direction of traffic, unit: %; the direction of traffic Corresponding to the four traffic flow directions of F1, F2, F3, and F4 in Figure 2. The headway distance of logistics vehicles in the direction of passage in the workshop Hi, unit s; the distance between the heads of logistics vehicles in the direction of passage in the workshop Di, unit m; the direction of passage corresponds to the two flow directions F1 and F3 in Figure 2. Average speed of traffic in a single lane

, the unit is m/s; in this embodiment, the following data on the traffic flow characteristics of the intersection are obtained through investigation:

direction of travel F1 F2 F3 F4 Flow Q, veh/h twenty four 15 twenty four 12 Proportion of logistics vehicles P, % 100% 20% 100% 16% Headway H, s 3.5 3 2.8 3 Head distance D, m 12 15 10 15 Average speed V_average, m/s 3.4 5 3.6 5

Step C: Then set up the intersection traffic safety facility system; as shown in Figure 2, in this embodiment, the intersection traffic safety facility system includes ground straight line (TS1), road central safety isolation column (TS2), deceleration ridge (TS3 ), No parking grid markings on the ground (TS4).

Step D: Set up the vehicle traffic signal indicating system. As shown in Fig. 2, in the present embodiment, the vehicle traffic signal indication system at the intersection consists of four groups of signal lamps (S1, S3, S5, S7) electrically connected to the output of the traffic signal control device (B1), four LED text prompt screens (S2, S4, S6, S8) composition.

Step E: deploy vehicle detection system;

In order to realize the signal control strategy described in step F, as shown in Figure 2, a vehicle detection system consisting of a conventional vehicle detection system and a priority logistics vehicle detection system is set at the intersection;

The conventional vehicle detection system includes: vehicle detector B2; ground vehicle detection coils NN and SS are installed at the entrances of intersection AP1 and AP3 to detect whether there is a vehicle traffic demand for traffic flow F1 and F3; ground vehicle detection coils are installed at the entrance of intersection AP2 E1, ed, ED and imported vehicle video detection integrated camera D6, ground coil W2 and export vehicle video detection integrated camera D5 are installed at the AP2 exit; the coil E1 is used to detect whether there is a vehicle traffic request for AP2 imported traffic flow F2, and collect traffic flow F2 Traffic flow Q2, time headway H2, headway distance D2. The coils ED and ed are request coils for opening the double-sided transparent fast rolling doors of the workshop. When the vehicle first occupies the coil ED and then occupies the coil ed, the double-sided transparent fast rolling doors are opened; the coil W2 is the end-of-use coil of the channel; The imported vehicle video detection integrated camera D6 and the exported vehicle video detection integrated camera D5 are used to collect passing vehicle images and license plate number data; the ground vehicle detection coils W1, wd, WD and the imported vehicle video detection integrated camera D3 are installed at the entrance of the intersection AP4 , set the ground coil W1 and the exit vehicle video detection integrated camera D1 at the exit of AP4. The coil W1 is used to detect whether there is a vehicle traffic request for the imported AP4 traffic flow F4, collect the traffic flow Q4 of the traffic flow F4, the headway time H4, and the headway distance D4; the coils WD and wd are used for opening the transparent fast rolling doors on both sides of the workshop Request coil, when the vehicle first occupies the coil WD and then occupies the coil WD, the double-sided transparent fast rolling door opens; the coil E2 is the coil at the end of channel use; the imported vehicle video detection integrated camera D3 and the exported vehicle video detection integrated camera D1 is used to collect images of passing vehicles and license plate number data; by comparing whether the license plate number data collected by cameras D6 and D1, D3 and D5 are consistent, it is judged whether there is a vehicle passing in the single lane, so as to ensure that the vehicles entering the single lane pass through the workshop corridor drive out. When the vehicle detection system determines that the single-lane vehicle has been used, and the door self-detection system detects that the vehicle has completely passed, the door will drop and close;

The priority logistics vehicle detection system includes the RFID antenna and RFID reader integration module D7 set at the entrance of AP2, the RFID detection host B2, the RFID antenna and RFID reader integration module D2 set at the entrance of AP4, and the integrated module D2 set on the logistics vehicle. Vehicle RFID card. The priority logistics vehicle detection system is used to detect the logistics vehicles that need priority passage in the single-lane AP2 entrance and AP4 entrance traffic flow F2, F4, and transmit the priority request to the vehicle detection system in the traffic signal control device.

Step F: Determine the intersection control strategy and basic timing.

1) Determination of vehicle traffic priority

As shown in Figure 2, in this embodiment, AP1 and AP2 entrance road traffic flows F1 and F3 have the highest priority right of way, and the AP2 entrance road traffic flow F2 has 15veh/h of vehicles, and the proportion of logistics vehicles is 20% higher than AP3 entrance road traffic flow F4 , the traffic flow F2 is the second-level right of way priority, which is given priority when the vehicle-mounted RFID request is used. The lowest level of traffic flow F4 has priority.

2) Determination of the phase sequence of the signal at the intersection

As shown in Fig. 3, in the present embodiment, the flow of logistics vehicles F1 and F3 at the entrances of the passages AP1 and AP3 at the intersection are arranged to have right-of-way at the time of going straight ahead, which is the first phase ST1; the flow of traffic at the entrance of AP2 F2 uses a single lane first, which is the first phase. The second phase ST2; the AP4 entrance traffic flow F4 is arranged as 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 process in Figure 4, and the specific control implementation scheme is as follows.

，本实施例中，

为：Step1: After the signal control system is started, the first phase ST1 starts to run, the signal lights S1 and S5 are green, and the LED text prompt screens S2 and S6 show please pass, and the traffic flow F1 and F3 pass through the intersection. Phase ST1 running minimum green light time

, in this example,

for:

s，

s,

。

运行了29s后如果车辆检测系统通过AP2进口道地面车辆检测线圈E1检测到车流F2有车占用线圈E1，则信号灯S1、S5绿灯转黄灯（Y=3秒）后亮红灯、LED文字提示屏S2、S6显示请等候，相位ST1结束，执行Step2；如果车辆检测系统通过AP2进口道地面车辆检测线圈E1检测到车流F2无车占用线圈E1，则跳过相位ST2，当车辆检测系统通过AP4进口道地面车辆检测线圈W1检测车流F4有车时执行Step3、否则跳过相位ST3执行Step1。

.

After running for 29s, if the vehicle detection system detects the vehicle flow F2 with vehicles occupying the coil E1 through the ground vehicle detection coil E1 of the AP2 entrance, the signal lights S1 and S5 will turn green and turn yellow (Y=3 seconds) and then turn red and LED text prompts Screens S2 and S6 show please wait, phase ST1 ends, and execute Step2; if the vehicle detection system detects that the vehicle flow F2 has no vehicles occupying the coil E1 through the ground vehicle detection coil E1 of the AP2 entrance road, skip phase ST2, and when the vehicle detection system passes AP4 Execute Step3 when the ground vehicle detection coil W1 at the entrance detects that there are vehicles in the traffic flow F4, otherwise skip phase ST3 and execute Step1.

,本实施例中，

为：Step2: The intersection starts to run the second phase ST2, the signal light S7 is green, the LED text prompt screen S8 shows please pass, the transparent fast rolling doors M1 and M2 are in the state of being able to open, the traffic flow F2 uses the single lane to drive westward, and the camera D6 at the entrance Collect traffic flow images and license plate data. Vehicles in the traffic flow first occupy the coil ED and then occupy the coil ed. The transparent fast rolling doors M1 and M2 are rolled up and opened. The traffic flow F2 passes through the workshop. The camera D1 at the exit collects traffic flow images and license plate data. Coil E2 records the number of passing vehicles. Minimum green light time for traffic flow F2

, in this example,

for:

17s；

17s;

运行结束后，当优先物料车辆检测系统D5检测到F2后续车流中安装有车载RFID的优先车辆到达，则每检测到1次将相位ST2绿灯时间延长单位绿灯延长时间X秒，本实施例中

，

1.5

如果在车流F2最大绿灯时间

内单位绿灯延长X秒后D5未连续检测到安装有车载RFID的优先车辆请求或绿灯时间达到车流F2最大绿灯时间时长

，则信号灯S7绿灯转黄灯（Y=3秒）后亮红灯、LED文字提示屏S8显示请等候,结束相位ST2。本实施例中，先确

=

，

=

，经调查分析

为2分钟，

，然后计算最大绿灯时间

为：

After the operation is over, when the priority material vehicle detection system D5 detects the arrival of the priority vehicle equipped with on-board RFID in the subsequent traffic flow of F2, the green light time of phase ST2 is extended by unit green light extension time X seconds every time it is detected. In this embodiment

,

1.5

If in traffic flow F2 maximum green time

After the green light of the internal unit is extended for X seconds, D5 does not continuously detect the request of priority vehicles equipped with on-board RFID or the green light time reaches the maximum green light time of traffic flow F2

, then the signal light S7 turns from green to yellow (Y=3 seconds) and then turns red, and the LED text prompt screen S8 displays please wait, and the phase ST2 ends. In this example, the first

=

,

=

, after investigation and analysis

for 2 minutes,

, and then calculate the maximum green light time

for:

；相位ST2结束后，如果AP4进口道车辆检测线圈W1检测到车流F4来车则执行Step3，否则返回执行Step1。

; After the phase ST2 ends, if the AP4 entrance vehicle detection coil W1 detects the incoming traffic flow F4, then execute Step3, otherwise return to execute Step1.

,本实施例中，

为：Step3: The third phase ST3 starts to run at the intersection, the signal light S3 lights up green, the LED text prompt screen S4 shows please pass, the transparent fast rolling doors M1 and M2 are in a state that can be opened, the traffic flow F4 uses the single lane to drive eastward, and the camera D3 at the entrance Collect traffic flow images and license plate data. Vehicles in the traffic flow first occupy the coil WD, and then occupy the coil WD. After the transparent fast rolling doors M1 and M2 are rolled up and opened, the traffic flow F4 passes through the workshop, and the camera D4 at the exit collects traffic flow images and license plate data. Coil W2 records the number of passing vehicles. Minimum green light time for traffic flow F4

, in this example,

for:

，

17s；

,

17s;

运行结束后，如果AP1进口道车辆检测线圈NN或AP3进口道车辆线圈SS检测到车流F1、F3来车则结束相位ST3返回执行Step1；如果未检测到车流F1、F3来车，继续检测车流F4中的优先请求，当优先物流车辆检测D2检测到F4后续车流中安装有车载RFID的优先车辆到达，则每检测到1次将相位ST3绿灯时间延长单位绿灯延长时间X秒，本实施例中

，

1.5

如果在车流F4最大绿灯时间

内单位绿灯延长X秒后D2未连续检测到安装有车载RFID的优先车辆请求或绿灯时间已达到车流F4最大绿灯时间时长

，则信号灯S3绿灯转黄灯（Y=3秒）后亮红灯、LED文字提示屏S4显示请等候后，结束相位ST3，返回执行Step1。本实施例中，先确定

=

，

=

，经调查分析

为2分钟

，然后计算最大绿灯时间

为：

After the operation is over, if the vehicle detection coil NN at the entrance of AP1 or the vehicle coil SS of the entrance of AP3 detects the arrival of traffic flow F1 and F3, then end phase ST3 and return to Step1; if no traffic flow F1 and F3 is detected, continue to detect the traffic flow F4 In the priority request, when the priority logistics vehicle detection D2 detects the arrival of the priority vehicle equipped with on-board RFID in the F4 follow-up traffic flow, the green light time of phase ST3 is extended by unit green light extension time X seconds every time it is detected. In this embodiment

,

1.5

If in traffic flow F4 maximum green time

After the green light of the internal unit is extended for X seconds, D2 does not continuously detect the request of priority vehicles equipped with on-board RFID or the green light time has reached the traffic flow F4 maximum green light time length

, then the signal light S3 turns from green to yellow (Y=3 seconds) and then turns red, and the LED text prompt screen S4 displays please wait, then end phase ST3 and return to step 1. In this example, first determine

=

,

=

, after investigation and analysis

for 2 minutes

, and then calculate the maximum green light time

for:

。

.

The above descriptions of the examples are only general case illustrations, for the purpose of making it easier for those skilled in the art to understand and apply the present invention. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be regarded 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:

G_Min(13)＝Max[G_Min(1),G_Min(3)]

wherein: g_Min(i) A minimum green time for traffic flow Fi; d_startiDelay in the start of the traffic flow Fi; di is the average head distance of the traffic flow Fi; v_averageiThe 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[P_t,H_i],

or

Wherein H_iThe headway time of the traffic flow Fi; le and Lw are lengths of canalization sections of single-lane inlets AP2 and AP 4; v_averageiThe vehicle flow Fi average speed; p_tFor 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:

G_Min(13)＝Max[G_Min(1),G_Min(3)]

wherein: g_Min(i) A minimum green time for traffic flow Fi; d_startiDelay in the start of traffic Fi; di is the average head distance of the traffic flow Fi; v_averageiThe 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[P_t,H_i],

or alternatively

Wherein H_iThe headway time of the traffic flow Fi; le and Lw are lengths of canalization sections of single-lane inlets AP2 and AP 4; v_averageiThe vehicle flow Fi average speed; p is_tFor 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.

Images