CN109183535B - Urban expressway plane ramp control system capable of switching directions - Google Patents

Abstract

Translated fromChinese

本发明涉及一种可切换方向的城市快速路平面匝道控制系统，主要用于解决当前匝道开口数量限制和匝道形式固定引起的城市平面匝道处车辆排队问题，使得平面匝道在不同时段内允许通行的行车方向可变。本发明包括检测器、显示器和设置于相邻上游出口匝道和下游入口匝道之间的特殊匝道。具体的工作方法为：若检测器检测到主道拥堵，特殊匝道切换为出口匝道；若检测器检测到主道畅通而辅道拥堵，此时特殊匝道切换为入口匝道。通过实时交通状态的检测，确定并改变匝道形式，从而有效解决当前匝道开口数量受限和匝道形式固定引起的城市快速路平面匝道处车辆通行效率低下的问题。

The invention relates to a direction-switchable urban expressway flat ramp control system, which is mainly used to solve the problem of vehicle queuing at the urban flat ramp caused by the current limit on the number of ramp openings and the fixed form of the ramp, so that the flat ramp is allowed to pass in different time periods The direction of travel is variable. The invention includes detectors, displays, and special ramps positioned between adjacent upstream off-ramps and downstream on-ramps. The specific working method is: if the detector detects that the main road is congested, the special ramp is switched to an off-ramp; if the detector detects that the main road is clear and the auxiliary road is congested, the special ramp is switched to an on-ramp. Through the detection of real-time traffic status, determine and change the form of the ramp, so as to effectively solve the problem of low vehicle traffic efficiency at the level ramp of the urban expressway caused by the limited number of ramp openings and the fixed form of the ramp.

Description

Translated fromChinese

一种可切换方向的城市快速路平面匝道控制系统A level ramp control system for urban expressways with switchable directions

技术领域technical field

本发明涉及一种可切换方向的城市快速路平面匝道控制系统。The invention relates to a direction-switchable urban expressway plane ramp control system.

背景技术Background technique

平面匝道是解决城市交通流从主道进入辅道或者从辅道进入主道的重要交通设施，平面匝道开口数量的多少和出入口形式的选择对主道及辅道车流的高效疏散起着至关重要的作用。The level ramp is an important traffic facility to solve the problem of urban traffic flow from the main road to the auxiliary road or from the auxiliary road to the main road. important role.

当前我国很多城市快速路都存在道路沿线匝道开口设置密集的问题，这会频繁干扰道路上的交通流，从而导致快速路承担长距离出行的功能降低，车辆行驶速度受影响。在出入口形式的选择方面，由于交通设计阶段的不合理以及出行需求的不稳定性，常常会出现入口匝道使用率低而出口匝道处主路车辆排队过长或者出口匝道使用率低而入口匝道处辅道车辆排队过长的情况。这极大地影响了城市快速路的利用率和城市道路交通流的运转效率。针对快速路匝道开口数量限制和匝道形式固定引起的车辆排队问题，合理设计平面匝道的物理形式，使其在不同交通需求状况下为不同流向的交通流服务是最佳解决方法。At present, many urban expressways in our country have the problem of dense ramp openings along the road, which will frequently interfere with the traffic flow on the road, resulting in the reduction of the expressway's ability to undertake long-distance travel and the impact of vehicle speed. In terms of the choice of entrance and exit forms, due to the unreasonable traffic design stage and the instability of travel demand, it often occurs that the utilization rate of the entrance ramp is low and the queue of vehicles on the main road at the exit ramp is too long, or the utilization rate of the exit ramp is low and the entrance ramp is low. The queue of vehicles on the auxiliary road is too long. This has greatly affected the utilization rate of urban expressways and the operating efficiency of urban road traffic flow. Aiming at the vehicle queuing problem caused by the limited number of ramp openings and fixed ramp forms on expressways, it is the best solution to rationally design the physical form of the ramp to serve traffic flows in different directions under different traffic demand conditions.

发明内容Contents of the invention

本发明目的，是针对上述问题，建立一种可切换方向的城市快速路平面匝道控制系统，使得平面匝道在不同时段内允许通行的行车方向可变。The object of the present invention is to solve the above problems and establish a direction-switchable urban expressway level ramp control system, so that the allowed driving direction of the level ramp in different time periods can be changed.

本发明的技术方案是：一种可切换方向的城市快速路平面匝道控制系统，如图1所示，包括设置于主道最外侧车道且距离出口匝道长度为L1的第一车辆检测器1、设置于辅道且距离入口匝道长度为L2的第二车辆检测器2、特殊匝道3、第一显示器4和第二显示器5；所述特殊匝道3位于相邻的出口匝道和入口匝道之间，第一显示器4设置在主道最外侧车道且距离出口匝道L3处，第二显示器5设置在辅道且距离特殊匝道3L4处；The technical solution of the present invention is: a kind of direction-switchable urban expressway level ramp control system, as shown in Figure 1, comprising a first vehicle detector 1 arranged on the outermost lane of the main road and having a length of L1 from the exit ramp, Asecond vehicle detector 2, aspecial ramp 3, a first display 4, and a second display 5 arranged on the auxiliary road and having a length L2 from the entrance ramp; thespecial ramp 3 is located between the adjacent exit ramp and the entrance ramp, The first display 4 is set on the outermost lane of the main road and is L3 away from the exit ramp, and the second display 5 is set on the auxiliary road and is 3L4 away from the special ramp;

所述第一车辆检测器1包括第一车辆感应器和第一匝道控制器；所述第一车辆检测器1检测到车辆后会持续输出脉冲信号；所述第一匝道控制器包括第一计数器、第一比较器和第一存储器，第一计数器的使能端接第一车辆感应器的输出端，所述第一计数器在持续的脉冲信号下产生累加的数值，第一计数器的输出端接第一比较器的一个输入端，第一比较器的另一个输入端接第一存储器，第一存储器中固设有第一控制阈值，即当第一计数器的输出值大于第一存储器中固设的第一控制阈值后，第一比较器输出高电平信号；The first vehicle detector 1 includes a first vehicle sensor and a first ramp controller; the first vehicle detector 1 will continue to output a pulse signal after detecting a vehicle; the first ramp controller includes a first counter , a first comparator and a first memory, the enabling terminal of the first counter is connected to the output terminal of the first vehicle sensor, and the first counter generates accumulated values under continuous pulse signals, and the output terminal of the first counter is connected to One input terminal of the first comparator, the other input terminal of the first comparator is connected to the first memory, and the first control threshold is fixed in the first memory, that is, when the output value of the first counter is greater than the fixed value in the first memory After the first control threshold, the first comparator outputs a high level signal;

所述第二车辆检测器2包括第二车辆感应器和第二匝道控制器；所述第二车辆检测器2检测到车辆后会持续输出脉冲信号；第二匝道控制器包括第二计数器、第二比较器和第二存储器，第二计数器的使能端接第二车辆感应器的输出端，所述第二计数器在持续的脉冲信号下产生累加的数值，第二计数器的输出端接第二比较器的二个输入端，第二比较器的另二个输入端接第二存储器，第二存储器中固设有第二控制阈值，即当第二计数器的输出值大于第二存储器中固设的第二控制阈值后，第二比较器输出高电平信号；Thesecond vehicle detector 2 includes a second vehicle sensor and a second ramp controller; thesecond vehicle detector 2 will continue to output a pulse signal after detecting the vehicle; the second ramp controller includes a second counter, a second Two comparators and a second memory, the enabling terminal of the second counter is connected to the output terminal of the second vehicle sensor, and the second counter generates accumulated values under the continuous pulse signal, and the output terminal of the second counter is connected to the second The two input terminals of the comparator, the other two input terminals of the second comparator are connected to the second memory, and the second control threshold is fixed in the second memory, that is, when the output value of the second counter is greater than the value fixed in the second memory After the second control threshold, the second comparator outputs a high level signal;

如图1所示，所述特殊匝道3由沿出口匝道至入口匝道方向，依次交错排列的第一自动升降机6、第二自动升降机7和第三自动升降机8构成，第一自动升降机6、第二自动升降机7和第三自动升降机8均为正三棱柱，且第一自动升降机6、第二自动升降机7和第三自动升降机8交错排列后的俯视图为梯形；所述第一自动升降机6、第二自动升降机7和第三自动升降机8可升高的最大高度相同且最低高度与地面齐平；As shown in Figure 1, thespecial ramp 3 is composed of the firstautomatic elevator 6, the secondautomatic elevator 7 and the thirdautomatic elevator 8 arranged in a staggered order along the exit ramp to the entrance ramp direction, the firstautomatic elevator 6, the second automatic elevator Twoautomatic elevators 7 and the thirdautomatic elevator 8 are regular triangular prisms, and the top view after the firstautomatic elevator 6, the secondautomatic elevator 7 and the thirdautomatic elevator 8 are staggered is a trapezoid; The maximum height that the secondautomatic lifter 7 and the thirdautomatic lifter 8 can raise is the same and the minimum height is flush with the ground;

第一自动升降机6的控制使能端接第一比较器和第二比较器的输出端，且固设的控制模式为，第一比较器的输出信号为低电平且第二比较器的输出信号为高电平时，第一自动升降机6下降至与地面齐平，第一比较器的输出信号为高电平时，第一自动升降机6上升至最大高度；否则第一自动升降机6上升至最大高度；The control enable terminal of the firstautomatic elevator 6 is connected to the output terminals of the first comparator and the second comparator, and the fixed control mode is that the output signal of the first comparator is low level and the output signal of the second comparator When the signal is at a high level, the firstautomatic elevator 6 descends to be flush with the ground, and when the output signal of the first comparator is at a high level, the firstautomatic elevator 6 rises to the maximum height; otherwise, the firstautomatic elevator 6 rises to the maximum height ;

第二自动升降机7的控制使能端接第一比较器和第二比较器的输出端，且固设的控制模式为，第一比较器的输出信号为低电平且第二比较器的输出信号为高电平时，第二自动升降机7下降至与地面齐平，第一比较器的输出信号为高电平时，第二自动升降机7下降至与地面齐平；否则第二自动升降机7上升至最大高度；The control enable terminal of the secondautomatic elevator 7 is connected to the output terminals of the first comparator and the second comparator, and the fixed control mode is that the output signal of the first comparator is low level and the output signal of the second comparator When the signal was at a high level, the secondautomatic elevator 7 descended to be flush with the ground, and when the output signal of the first comparator was at a high level, the secondautomatic elevator 7 descended to be flush with the ground; otherwise the secondautomatic elevator 7 rose to maximum height;

第三自动升降机8的控制使能端接第一比较器和第二比较器的输出端，且固设的控制模式为，第一比较器的输出信号为低电平且第二比较器的输出信号为高电平时，第三自动升降机8上升至最大高度，第一比较器的输出信号为高电平时，第三自动升降机8下降至与地面齐平；否则第三自动升降机8上升至最大高度；The control enable terminal of the thirdautomatic elevator 8 is connected to the output terminals of the first comparator and the second comparator, and the fixed control mode is that the output signal of the first comparator is low level and the output signal of the second comparator When the signal is high level, the thirdautomatic elevator 8 rises to the maximum height, and when the output signal of the first comparator is high level, the thirdautomatic elevator 8 descends to be flush with the ground; otherwise the thirdautomatic elevator 8 rises to the maximum height ;

第一显示器4的使能端接第一比较器的输出端，在第一比较器输出高电平信号时指示特殊匝道3的状态为出口匝道；The enabling terminal of the first display 4 is connected to the output terminal of the first comparator, and when the first comparator outputs a high level signal, the state of thespecial ramp 3 is indicated as an exit ramp;

第二显示器5的使能端接第一比较器和第二比较器的输出端，在第一比较器输出低电平信号且第二比较器输出高电平信号时指示特殊匝道3的状态为入口匝道。The enabling terminal of the second display 5 is connected to the output terminals of the first comparator and the second comparator, and when the first comparator outputs a low-level signal and the second comparator outputs a high-level signal, the state of thespecial ramp 3 is indicated as On-ramp.

本发明的工作原理为：Working principle of the present invention is:

在城市快速路相邻上游出口匝道和下游入口匝道之间设置一个特殊匝道，该匝道可以通过不同组件自动升降的方式来改变平面匝道的物理形式；在出口匝道上游和特殊匝道上游均设置有显示器用来引导驾驶员选择匝道；在主道出口匝道上游和辅道入口匝道上游均设置有车辆检测器。实时监测车辆的滞留时间，若车辆滞留的时间超出预设的时间阈值，则判断为道路拥堵。A special ramp is set between the adjacent upstream exit ramp and the downstream entrance ramp of the urban expressway. This ramp can change the physical form of the plane ramp through the automatic lifting of different components; monitors are installed on the upstream of the exit ramp and the upstream of the special ramp. It is used to guide the driver to choose the ramp; vehicle detectors are installed upstream of the exit ramp of the main road and the entrance ramp of the auxiliary road. Real-time monitoring of vehicle retention time, if the vehicle retention time exceeds the preset time threshold, it will be judged as road congestion.

若主道出口匝道上游判断为道路拥堵，说明离开主道进入辅道的车辆数量较多，为保证主干道车辆的通行，此时特殊匝道应为出口匝道，同时位于出口匝道上游的显示器显示“前方出口匝道开启”字样，引导驾驶员离开主道进入辅道；若主道出口匝道上游未判断为拥堵(畅通)且辅道入口匝道上游判断为道路拥堵，说明此时主道交通条件良好且欲离开辅道进入主道的车辆较多，此时特殊匝道为入口匝道，同时位于特殊匝道上游的显示器显示“本处入口匝道开启”字样，引导驾驶员进入主道。If the upstream of the off-ramp of the main road is judged to be road congestion, it means that there are a large number of vehicles leaving the main road and entering the auxiliary road. The words "Exit Ramp Ahead is Open" guide the driver to leave the main road and enter the auxiliary road; if the upstream of the main road exit ramp is not judged to be congested (smooth) and the upstream of the auxiliary road entrance ramp is judged to be road congestion, it means that the traffic conditions on the main road are good and There are many vehicles intending to leave the auxiliary road and enter the main road. At this time, the special ramp is an on-ramp, and the display located upstream of the special ramp displays the words "This entrance ramp is open" to guide the driver to enter the main road.

在本发明中，采用车辆感应器、计数器和比较器组合的方式判断道路是否拥堵，方法简单，易于实现，且成本低廉；采用自动升降机配合三个三棱柱组件的方式完成特殊匝道为出口匝道或入口匝道的切换，自动升降机可以根据车辆检测器输出的不同信号完成升降，控制方式也简单易于实现。可以很明显的看出本发明方法可行并且可以有效的解决当前匝道开口数量受限和匝道形式固定引起的城市平面匝道处车辆通行效率低下的问题。In the present invention, the combination of vehicle sensors, counters and comparators is used to determine whether the road is congested. The method is simple, easy to implement, and low in cost; the special ramp is completed by using an automatic lifter with three triangular prism components as an exit ramp or For the switching of the entrance ramp, the automatic elevator can complete the lifting according to different signals output by the vehicle detector, and the control method is simple and easy to implement. It can be clearly seen that the method of the present invention is feasible and can effectively solve the problem of low vehicle traffic efficiency at urban level ramps caused by the limited number of ramp openings and fixed ramp forms.

附图说明Description of drawings

图1是本发明的检测器、显示器和匝道布设位置示意图；Fig. 1 is a schematic diagram of detector, display and ramp laying position of the present invention;

图2是本发明的特殊匝道出入口形式判断流程图；Fig. 2 is the judging flow chart of special ramp entrance and exit form of the present invention;

图3是本发明的特殊匝道为入口匝道(左)和出口匝道(右)的示意图。Fig. 3 is a schematic diagram of the special ramp of the present invention being an on-ramp (left) and an off-ramp (right).

具体实施方式Detailed ways

在发明内容中已经详细描述了本发明的技术方案，在此不再赘述。The technical solution of the present invention has been described in detail in the summary of the invention, and will not be repeated here.

需要补充的是，上述的技术方案只是选择了两个相邻出入口匝道进行演示以便于较容易的理解本发明的方案，实际上根据具体情况，本领域内技术人员可以进行多种的组合，在不同地点根据需要新建或改造特殊匝道，本发明的主要目的，便是建立一种可切换方向的城市快速路平面匝道控制系统，以极大的提升城市主干道和辅道交织处车流的通行效率。同时本发明中使用的电子器件的选择，因为这些技术均十分成熟，可根据实际需求(成本、性能等偏好)进行选择，在此不再列举。What needs to be added is that the above-mentioned technical solution only selects two adjacent entrance and exit ramps for demonstration in order to understand the solution of the present invention more easily. In fact, according to the specific situation, those skilled in the art can make various combinations. Different locations need to build or renovate special ramps. The main purpose of this invention is to establish a control system for urban expressway level ramps that can switch directions, so as to greatly improve the traffic efficiency of traffic flow at the intersection of urban arterial roads and auxiliary roads. . At the same time, the selection of electronic devices used in the present invention, because these technologies are very mature, can be selected according to actual needs (preferences such as cost and performance), and will not be listed here.

Claims (1)

1. The urban expressway plane ramp control system capable of switching directions is characterized by comprising a first vehicle detector (1) arranged on an outermost lane of a main road and having a distance L1 from an exit ramp, a second vehicle detector (2) arranged on an auxiliary road and having a distance L2 from an entrance ramp, a special ramp (3), a first display (4) and a second display (5); the special ramp (3) is positioned between the adjacent exit ramp and the entrance ramp, the first display (4) is arranged on the outermost lane of the main lane and is L3 away from the exit ramp, and the second display (5) is arranged on the auxiliary lane and is L4 away from the special ramp (3);

the first vehicle detector (1) comprises a first vehicle inductor and a first turnstile controller; the first vehicle detector (1) can continuously output pulse signals after detecting the vehicle; the first turn controller comprises a first counter, a first comparator and a first memory, wherein the enabling end of the first counter is connected with the output end of the first vehicle sensor, the first counter generates an accumulated numerical value under a continuous pulse signal, the output end of the first counter is connected with one input end of the first comparator, the other input end of the first comparator is connected with the first memory, a first control threshold value is fixedly arranged in the first memory, namely, when the output value of the first counter is greater than a first control threshold value fixedly arranged in the first memory, the first comparator outputs a high-level signal;

the second vehicle detector (2) comprises a second vehicle sensor and a second turnstile controller; the second vehicle detector (2) can continuously output pulse signals after detecting the vehicle; the second turn controller comprises a second counter, a second comparator and a second memory, wherein the enable end of the second counter is connected with the output end of the second vehicle sensor, the second counter generates an accumulated numerical value under a continuous pulse signal, the output end of the second counter is connected with two input ends of the second comparator, the other two input ends of the second comparator are connected with the second memory, and a second control threshold value is fixedly arranged in the second memory, namely when the output value of the second counter is greater than a second control threshold value fixedly arranged in the second memory, the second comparator outputs a high-level signal;

the special ramp (3) is composed of a first automatic lifting machine (6), a second automatic lifting machine (7) and a third automatic lifting machine (8) which are sequentially arranged in a staggered manner along the direction from an exit ramp to an entrance ramp, the first automatic lifting machine (6), the second automatic lifting machine (7) and the third automatic lifting machine (8) are all regular triangular prisms, and the top view of the first automatic lifting machine (6), the second automatic lifting machine (7) and the third automatic lifting machine (8) after staggered arrangement is trapezoidal; the first automatic lifter (6), the second automatic lifter (7) and the third automatic lifter (8) can be lifted to the same maximum height, and the lowest height is flush with the ground;

the control enabling end of the first automatic lifter (6) is connected with the output ends of the first comparator and the second comparator, and the fixed control mode is that when the output signal of the first comparator is at a low level and the output signal of the second comparator is at a high level, the first automatic lifter (6) descends to be flush with the ground, and when the output signal of the first comparator is at a high level, the first automatic lifter (6) ascends to the maximum height; otherwise the first automatic elevator (6) rises to the maximum height;

the control enabling end of the second automatic lifter (7) is connected with the output ends of the first comparator and the second comparator, and the fixed control mode is that when the output signal of the first comparator is at a low level and the output signal of the second comparator is at a high level, the second automatic lifter (7) descends to be flush with the ground, and when the output signal of the first comparator is at a high level, the second automatic lifter (7) descends to be flush with the ground; otherwise the second automatic elevator (7) rises to the maximum height;

the control enabling end of the third automatic elevator (8) is connected with the output ends of the first comparator and the second comparator, and the fixed control mode is that when the output signal of the first comparator is at a low level and the output signal of the second comparator is at a high level, the third automatic elevator (8) rises to the maximum height, and when the output signal of the first comparator is at a high level, the third automatic elevator (8) falls to be flush with the ground; otherwise the third automatic elevator (8) rises to the maximum height;

the enabling end of the first display (4) is connected with the output end of the first comparator, and the state of the special ramp (3) is indicated to be an exit ramp when the first comparator outputs a high level signal;

and the enabling end of the second display (5) is connected with the output ends of the first comparator and the second comparator, and when the first comparator outputs a low level signal and the second comparator outputs a high level signal, the state of the special ramp (3) is indicated as an entrance ramp.

Images