CN110588726A - Tramcar signal priority control system and method based on LTE-V2X - Google Patents
Tramcar signal priority control system and method based on LTE-V2X Download PDFInfo
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- CN110588726A CN110588726A CN201910917760.1A CN201910917760A CN110588726A CN 110588726 A CN110588726 A CN 110588726A CN 201910917760 A CN201910917760 A CN 201910917760A CN 110588726 A CN110588726 A CN 110588726A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
- B61L27/40—Handling position reports or trackside vehicle data
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
- B61L27/70—Details of trackside communication
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Abstract
The invention relates to the technical field of road traffic signal control, in particular to a tramcar signal priority control system and method based on LTE-V2X. The tramcar signal priority control system based on LTE-V2X includes: the system comprises a tramcar on-board unit, a road side unit, a road traffic signal controller, traffic detection equipment, a signal machine unit, a central traffic signal control system and an internet of vehicles platform; the tramcar signal priority control method based on LTE-V2X specifically comprises the following steps: the tramcar drives away from the upstream crossing and is connected with the road side unit at the crossing; the tramcar is in real-time communication with the road side unit and uploads tramcar operation information; the road traffic signal controller applies different control strategies according to the tramcar running information and the intersection traffic state control signal machine unit; and the tramcar passes according to different control strategies of the intersection signal machine unit.
Description
Technical Field
The invention relates to the technical field of road traffic signal control, in particular to a tramcar signal priority control system and method based on LTE-V2X (Long Term Evolution-vehicle to electric communication).
Background
With the development and the process of urbanization of the society, more and more urban road networks cannot keep up with the increase of the quantity of motor vehicles and the traffic pressure is increased greatly, so that governments in various regions advocate to develop public transportation vigorously. Public transportation of big cities and extra big cities in China generally takes buses and subways as main points. But the public transport has the defects that the punctuality rate cannot be guaranteed and the transport capacity is low, and the biggest defect of the subway is that the construction cost is high and the construction requirement is high. The modern tramcar can effectively solve the two problems, is suitable for being used as a supplement for subways in large cities, is more suitable for the rail transit development of medium and small cities, and provides a convenient and comfortable public transportation environment for the people to go out.
As a part of a tramcar operation system, the intersection priority function is generally realized by matching a road traffic signal control system and a tramcar level crossing signal system at present. The tramcar level crossing signal system is mainly responsible for signal acquisition of tramcars and switching of an access indicator, and the road traffic signal control system is mainly responsible for adjusting the phase of traffic signals to ensure that the tramcars pass through the crossing quickly and safely. In order to collect the signal of the tramcar, a beacon or an underground device is generally adopted, so that the problems of complex construction and inconvenient later maintenance exist; the two systems are connected through a communication line, and the problems of high requirement on the reliability of the line and high construction cost exist.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the tramcar signal priority control system and method based on the LTE-V2X, and the tramcar signal priority control system and method based on the LTE-V2X do not need to be controlled together with a tramcar signal system, so that the reliability of the whole system can be improved, the project construction cost is reduced, and the system and method have higher economic value and practical significance.
According to an aspect of the present invention, there is provided, as a first aspect of the present invention, a tramcar signal priority control system including:
the tramcar-mounted unit is used for storing the tramcar running information and transmitting the tramcar running information;
the road side unit can collect tramcar running information sent by the tramcar on-board unit;
the road traffic signal controller can perform information interaction with the road side unit and receive tramcar operation information sent by the road side unit;
the traffic detection equipment can interact with the road traffic signal controller, detect a real-time traffic state and send a detection result to the road traffic signal controller;
the signal machine unit can interact with the road traffic signal controller and can display according to a control signal of the road traffic signal controller;
the central traffic signal control system can interact with the road traffic signal controller, can comprehensively judge the real-time traffic state of each intersection and send the result to the road traffic signal controller of each intersection;
the vehicle networking platform can interact with the road side units through the base station, and can perform data access on information sent by the road side units of each intersection.
Further, the traffic signal unit includes:
the traffic signal lamp can interact with the road traffic signal controller and can display according to a control signal of the road traffic signal controller;
the tram trolley-bus semaphore can interact with the road traffic signal controller and can display according to a control signal of the road traffic signal controller.
As a second aspect provided by the present invention, there is provided a tramcar signal priority control method specifically including:
the tramcar drives away from the upstream crossing and is connected with the road side unit at the crossing;
the tramcar is in real-time communication with the road side unit and uploads tramcar operation information;
the road traffic signal controller applies different control strategies according to the tramcar running information and the intersection traffic state control signal machine unit;
and the tramcar passes according to different control strategies of the intersection signal machine unit.
Further, the steps of: the road traffic signal controller specifically comprises the following control strategies according to the tramcar running information and the application of different control signal units of the intersection traffic state:
the road traffic signal controller analyzes the stop information of the tramcar according to the received tramcar running information and judges whether the tramcar needs to stop;
if the station does not need to be stopped, judging whether priority control can be carried out on the tramcar according to the traffic state of the intersection;
if the tramcar can be subjected to priority control, analyzing the operation state information of the tramcar according to the tramcar operation information, and judging the priority level of the tramcar according to the operation state information;
and the road traffic signal controller controls the annunciator unit to display different control strategies according to the priority level of the tramcar.
Further, the operation state information of the tramcar comprises three situations, namely an early point situation, a late point situation and a main point situation;
if the operation state information of the tramcar is an early point, the tramcar is not subjected to priority control;
if the operation state information of the tramcar is late, performing an absolute priority control strategy on the tramcar;
and if the operation state information of the tramcar is a positive point, performing a relative priority control strategy on the tramcar.
Further, the absolute priority control policy specifically includes:
the road traffic signal controller inserts the phase of releasing the tramcar before the tramcar reaches the intersection;
and the control strategy displayed by the signal machine unit indicates that the tramcar can pass through the intersection without stopping.
Further, the relative priority control policy specifically includes:
the road traffic signal controller analyzes the position information and the speed information of the tramcar according to the tramcar running information sent by the road side unit, so as to judge the phase of the tramcar when the tramcar reaches the intersection and adjust the phase period of the intersection signal machine unit.
Further, in the performing step: in the process that the tramcar passes according to different control strategies of the intersection annunciator unit, if a road traffic signal controller receives a tramcar entering intersection signal sent by a road side unit, the tramcar is locked in the phase of releasing the tramcar;
if the road traffic signal controller receives the tramcar leaving intersection information sent by the road side unit, the control of the intersection reference control scheme is recovered;
the tram on-board unit attempts to connect to the road side unit at the next intersection.
As can be seen from the above, the system and the method for controlling priority of tramcar signals based on LTE-V2X provided by the present invention have the following advantages compared with the prior art: the tramcar signal priority control system and method based on LTE-V2X are used for realizing real-time communication between a road traffic signal controller and a tramcar, ensuring that the tramcar safely and effectively passes through a level crossing and giving consideration to social traffic. The LTE-V2X-based LTE-V2X-based tramcar signal priority control system and method can be used without a beacon or a car ground loop device, so that the construction and maintenance difficulty is reduced; the system does not need to be jointly controlled with a tramcar signal system, can improve the reliability of the whole system, reduces the project construction cost, and has higher economic value and practical significance.
Drawings
Fig. 1 is a schematic structural diagram of a tramcar signal priority control system provided by the invention.
Fig. 2 is a flowchart of a tramcar signal priority control method provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The terms "inner" and "outer" are used to refer to directions toward and away from, respectively, the geometric center of a particular component.
As a first aspect of the present invention, there is provided a tram signal priority control system including:
the system comprises at least one tramcar, a tramcar-mounted unit and a monitoring unit, wherein the tramcar-mounted unit is installed on the tramcar, the tramcar-mounted unit stores the tramcar operation information and can transmit the tramcar operation information through a Long Term Evolution (LTE) technology;
the system comprises a road side unit and a communication unit, wherein the road side unit is arranged at a road intersection and can acquire tramcar operation information sent by a tramcar on-board unit;
the road traffic signal controller can perform information interaction with the road side unit and receive tramcar operation information sent by the road side unit;
the traffic detection equipment can interact with the road traffic signal controller, detect a real-time traffic state and send a detection result to the road traffic signal controller;
and the signal machine unit can interact with the road traffic signal controller and can display according to the control signal of the road traffic signal controller.
The central traffic signal control system can interact with the road traffic signal controller, can comprehensively judge the real-time traffic state of each intersection and send the result to the road traffic signal controller of each intersection;
the vehicle networking platform can interact with the road side units in an LTE-V2X network through a base station, and can perform data access on information sent by the road side units at each intersection.
The traffic signal unit includes:
the traffic signal lamp can interact with the road traffic signal controller and can display according to a control signal of the road traffic signal controller;
the tram trolley-bus semaphore can interact with the road traffic signal controller and can display according to a control signal of the road traffic signal controller.
As a second aspect of the present invention, there is provided a tramcar signal priority control method specifically including the steps of:
the tramcar drives away from the upstream crossing and is connected with the road side unit at the crossing;
step S1: the tramcar is in real-time communication with the road side unit and uploads tramcar operation information to the road side unit through LTE (long term evolution), and the road side unit sends the tramcar operation information to the road traffic signal controller and uploads the tramcar operation information to the Internet of vehicles platform; the tramcar running information comprises tramcar number, stop information, position information, speed information, entrance and exit intersection information and operation state information, and the operation state information comprises: the method comprises the following three conditions of an early point, a late point and a punctuation, wherein the early point is earlier than a preset time point, the late point is later than the preset time point, and the late point which is equal to the preset time is the punctuation;
step S2: the road traffic signal controller analyzes the stop information of the tramcar according to the received tramcar running information, judges whether the tramcar needs to stop, and if the tramcar needs to stop, the step S2 is carried out, and if the tramcar does not need to stop, the step S3 is carried out;
step S3: the road traffic signal controller judges whether to respond to the tram priority according to the real-time traffic condition sent by the traffic detection device or the central traffic signal control system, and if the tram priority is executed, the step S4 is executed: if the electric car is not prioritized, the process proceeds to step S5;
step S4: the road traffic signal controller analyzes the operation state information of the tramcar according to the received tramcar operation information, selects different priority strategies according to different operation state information of the tramcar, and shifts to step S5 if the operation state information of the tramcar indicates early, shifts to step S6 if the operation state information of the tramcar indicates late, and shifts to step S7 if the operation state information of the tramcar indicates positive;
step S5: the tramcar is not subjected to priority control: waiting for the running phase of the road traffic controller to the tramcar capable of running before the tramcar runs to the intersection, observing the tramcar signal machine to give a traffic signal and then entering the intersection, and turning to the step S8;
step S6: carrying out absolute priority control on the tramcar: when the more operation interval of tram circuit operation class is less, if the tram takes place the late point because of various accidents, can be great to operation alignment point rate of honour and security interference, influence the operation of follow-up class tram, so need let the tram of late point fast, safely pass through the crossing. The road traffic signal controller inserts the phase for releasing the tramcar before the tramcar reaches the intersection, and the step is switched to step S8 after the execution;
step S7: the tramcar is released by adopting a relative priority control strategy when the tramcar is right, and the road traffic signal controller analyzes the position information and the speed information of the tramcar according to the tramcar running information sent by the road side unit, so that the phase of the tramcar when the tramcar reaches the intersection is judged and the signal phase period of the intersection is adjusted. If the distance between the electric car and the intersection exceeds the threshold value A meter, the adjustment is carried out for no more than B seconds, if the distance between the electric car and the intersection is less than the threshold value A meter, the adjustment is carried out for more than B seconds, and the step is shifted to the step S8 after the execution;
A＝min(l1，600)；
wherein l1The distance from the tramcar platform to the stop line of the intersection in the road section;
the value of B is determined according to the traffic flow direction, and it is generally preferable to set the traffic flow direction B to 3 if the train direction is the main traffic flow direction, and to set the traffic flow direction B to 5 if the train direction is not the main traffic flow direction
Step S8: if the road traffic signal controller receives a tramcar entering intersection signal sent by the road side unit, the phase of the released tramcar is locked to ensure the safety of the tramcar in the intersection, the step S9 is carried out, and if the tramcar entering intersection signal is not received, the step S3 is returned;
step S9: and the road traffic signal controller receives the tramcar departure information sent by the road side unit, and then recovers the control of the intersection reference control scheme. The tram on-board unit attempts to connect to the road side unit at the next intersection.
Those of ordinary skill in the art will understand that: the above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit of the present invention should be included in the scope of the present invention.
Claims (8)
1. An LTE-V2X-based tramcar signal priority control system, characterized in that the LTE-V2X-based tramcar signal priority control system comprises:
the tramcar-mounted unit is used for storing the tramcar running information and transmitting the tramcar running information;
the road side unit can collect tramcar running information sent by the tramcar on-board unit;
the road traffic signal controller can perform information interaction with the road side unit and receive tramcar operation information sent by the road side unit;
the traffic detection equipment can interact with the road traffic signal controller, detect a real-time traffic state and send a detection result to the road traffic signal controller;
the signal machine unit can interact with the road traffic signal controller and can display according to a control signal of the road traffic signal controller;
the central traffic signal control system can interact with the road traffic signal controller, can comprehensively judge the real-time traffic state of each intersection and send the result to the road traffic signal controller of each intersection;
the vehicle networking platform can interact with the road side units through the base station, and can perform data access on information sent by the road side units of each intersection.
2. The LTE-V2X-based tram signal priority control system according to claim 1, wherein the traffic signal unit includes:
the traffic signal lamp can interact with the road traffic signal controller and can display according to a control signal of the road traffic signal controller;
the tram trolley-bus semaphore can interact with the road traffic signal controller and can display according to a control signal of the road traffic signal controller.
3. The tramcar signal priority control method based on LTE-V2X is characterized by specifically comprising the following steps of:
the tramcar drives away from the upstream crossing and is connected with the road side unit at the crossing;
the tramcar is in real-time communication with the road side unit and uploads tramcar operation information;
the road traffic signal controller controls the annunciator unit to display different control strategies according to the tramcar running information and the intersection traffic state;
and the tramcar passes according to different control strategies of the intersection signal machine unit.
4. The tram signal priority control method based on LTE-V2X, according to claim 3, characterized in that the steps of: the road traffic signal controller specifically comprises the following control strategies according to the tramcar running information and the intersection traffic state control signal unit display difference:
the road traffic signal controller analyzes the stop information of the tramcar according to the received tramcar running information and judges whether the tramcar needs to stop;
if the station does not need to be stopped, judging whether priority control can be carried out on the tramcar according to the traffic state of the intersection;
if the tramcar can be subjected to priority control, analyzing the operation state information of the tramcar according to the tramcar operation information, and judging the priority level of the tramcar according to the operation state information;
and the road traffic signal controller controls the annunciator unit to apply different control strategies according to the priority level of the tramcar.
5. The LTE-V2X-based tramcar signal priority control method according to claim 4, wherein the tramcar operation state information comprises three situations of early, late and due;
if the operation state information of the tramcar is an early point, the tramcar is not subjected to priority control;
if the operation state information of the tramcar is late, performing an absolute priority control strategy on the tramcar;
and if the operation state information of the tramcar is a positive point, performing a relative priority control strategy on the tramcar.
6. The tram signal priority control method based on LTE-V2X as claimed in claim 5, wherein the absolute priority control strategy is specifically:
the road traffic signal controller inserts the phase of releasing the tramcar before the tramcar reaches the intersection;
and the control strategy displayed by the signal machine unit indicates that the tramcar can pass through the intersection without stopping.
7. The tram signal priority control method based on LTE-V2X as claimed in claim 5, wherein the relative priority control strategy is specifically:
the road traffic signal controller analyzes the position information and the speed information of the tramcar according to the tramcar running information sent by the road side unit, so as to judge the phase of the tramcar when the tramcar reaches the intersection and adjust the phase period of the intersection signal machine unit.
8. The tram signal priority control method based on LTE-V2X, according to claim 3, characterized by performing the steps of: in the process that the tramcar passes according to different control strategies of the intersection annunciator unit, if a road traffic signal controller receives a tramcar entering intersection signal sent by a road side unit, the tramcar is locked in the phase of releasing the tramcar;
if the road traffic signal controller receives the tramcar leaving intersection information sent by the road side unit, the control of the intersection reference control scheme is recovered;
the tram on-board unit attempts to connect to the road side unit at the next intersection.
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| CN111874036A (en) * | 2020-05-31 | 2020-11-03 | 卡斯柯信号有限公司 | Tramcar autonomous operation control system based on car-to-car communication |
| CN112565374A (en) * | 2020-11-27 | 2021-03-26 | 安徽工业大学 | Car networking semaphore based on V2X technique |
| CN114104049A (en) * | 2021-11-29 | 2022-03-01 | 安徽达尔智能控制系统股份有限公司 | Rail train signal control method and system based on V2X technology |
| CN114155712A (en) * | 2021-12-14 | 2022-03-08 | 阿波罗智联(北京)科技有限公司 | Control method, device and system of traffic signal lamp |
| CN114898580A (en) * | 2022-06-16 | 2022-08-12 | 浙江嘉科电子有限公司 | Linkage control system and method for traffic signal machine and tramcar intersection controller |
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Application publication date: 20191220 |