CN113820977A - Double-link remote redundancy control system and method for signal lamp - Google Patents
Double-link remote redundancy control system and method for signal lamp Download PDFInfo
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
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- G05B2219/23051—Remote control, enter program remote, detachable programmer
Abstract
The invention relates to a double-link remote redundancy control system and method for signal lamps, and belongs to the field of intelligent traffic. The method comprises the following steps: the signal lamp control system is based on dual-core (A, B controller) control, two paths of signal lamp execution modules (A, B execution) are controlled by receiving command data of command center dual-link communication (A, B communication), the redundancy control method dynamically selects the controller A or B, dynamically selects the communication A or B, and dynamically selects the execution A or B to form signal lamp redundancy control; the reliability and controllability of signal lamp remote control under the scenes of power supply limitation, communication limitation and the like are improved.
Description
Technical Field
The invention belongs to the field of intelligent traffic, and relates to a double-link remote redundancy control system and method for signal lamps.
Background
The traffic signal lamp is used for directing traffic, and indicates whether vehicles, pedestrians, ships and the like pass or not according to the combination of different lights, colors, shapes and the like. The traffic signal lamp usually displays different lights, combinations and the like according to a control instruction of a command center to realize a traffic control function. Whether the traffic signal lamp can work reliably is mainly influenced by power supply, communication, light control and the like. Especially in inland river partial channels with remote positions, severe environments, limited communication and limited power supplies, for example, signal lamps with lamp starting, flashing frequency and the like are controlled by receiving command instructions, and how to ensure reliable work of the signal lamps is crucial in scenes without wired communication, commercial power and the like.
Disclosure of Invention
In view of the above, the present invention provides a dual link remote redundancy control system and method for signal lamps.
In order to achieve the purpose, the invention provides the following technical scheme:
a double-link remote redundancy control system for traffic signal lamps comprises a signal lamp remote control command center and a signal lamp control system;
the signal lamp remote control command center is provided with two communication devices with different communication modes for remote communication, wherein the two different communication modes are a communication mode A and a communication mode B;
the signal lamp control system comprises a controller A and a controller B;
the controller A consists of a communication module A, a battery A, a control module A and an execution module A; the controller B consists of a communication module B, a battery B, a control module B and an execution module B;
the communication module A and the communication module B correspond to the communication mode A and the communication mode B respectively, and the communication module A and the communication module B are used for communicating with the signal lamp remote control command center, receiving data sent by the signal lamp remote control command center and feeding back the data of the signal lamp control system to the signal lamp remote control command center.
Optionally, the method is characterized in that: the method comprises the following steps:
s1: the controller A is communicated with the command center through the communication module A to process data; the controller B is communicated with the command center through the communication module B to process data; the controller A and the controller B carry out local communication through a data line and monitor each other;
s2: the execution module A or the execution module B receives the instruction of the control module A and executes the control signal of the signal lamp; the execution module A or the execution module B receives the instruction of the control module B and executes the control signal of the signal lamp; the execution module A and the execution module B can not work simultaneously, are only controlled by the control module A or the control module B at the same time, and are directly connected with the signal lamp;
s3: the controller A and the controller B work simultaneously under the normal working state of the signal lamp controller, and a communication network is established with the signal lamp remote control command center through the communication module A and the communication module B respectively to receive instructions; the controller A and the controller B carry out information interaction and mutual monitoring, the controller A completes the control of the signal lamp, and the controller B only receives signals:
s4: when the communication module A in the controller A fails, the controller A switches to receive command center instructions forwarded by the controller B, and the controller A controls the signal lamp.
Optionally, when the execution module a of the controller a fails, the controller a calls the execution module B, and the execution module B completes control of the signal lamp.
Optionally, when the control module a of the controller a and the battery a have faults, the signal lamp controller gives the control authority to the controller B, and the control of the signal lamp is completed through an instruction received by the communication module B.
The invention has the beneficial effects that:
the invention mainly solves the problem of insufficient control stability of the unmanned traffic signal lamp, and realizes remote control of the signal lamp with low personnel cost, low infrastructure cost, high controllability and high stability.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a signal light controller according to the present invention;
FIG. 2 is a flow chart of a solution to the problem of dual link communication and dual core redundancy control according to the present invention;
FIG. 3 is a flow chart of a solution to the redundancy control problem of the dual link communication and two groups of signal lamp execution modules according to the present invention;
FIG. 4 is a schematic diagram of a dual link communication for three signal lamps in a specific embodiment of the present invention;
fig. 5 is a schematic diagram of a double-link redundancy control method for three signal lamps in a specific embodiment provided by the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Please refer to fig. 1 to 5.
Content 1, which is a solution to the problem of redundancy control of dual link communication and dual control cores, a signal lamp controller is composed of a controller a and a controller B. The controller A carries a wireless communication module A, and carries out remote wireless communication by taking a communication link A as a main communication mode; the controller B carries a wireless communication module B and performs local area wireless communication using the communication link B as a backup wireless communication method. Under normal conditions, the controller A is used as a main route for receiving instructions of the signal lamp controller through the wireless communication module A, the controller B receives the instructions from the communication link B through the wireless communication module B to be used as a backup route for receiving the instructions of the signal lamp controller, but the controller B and the controller A carry out real-time wired communication and monitor each other; under normal conditions, the controller B only receives the instruction and does not control the signal lamp through the execution module; when communication interruption occurs to the communication link A and no signal exists, the controller A acquires the instruction received by the controller B until the wireless communication module A recovers to be normal; when the control module A has a fault, the controller B receives the instruction through the wireless communication module B and controls the signal lamp through the execution module A or the execution module B until the control module A is recovered to be normal.
Content 2, a solution to the problem of redundant control of the dual-link communication and two groups of beacon execution modules A, B, where controller a and controller B are both connected to beacon execution module a and execution module B; the execution module B is a spare of the execution module A. Under normal conditions, the signal lamp controller receives an instruction from a command center through the controller A through the wireless communication module A, and the signal lamp is turned on and flickers through the execution module A; under the condition that the execution module A has a fault, the controller A receives an instruction through the wireless communication module A, and the signal lamp is turned on and flickers by switching the execution module B; similarly, when the communication of the wireless communication module A is interrupted, the controller A acquires the instruction received by the controller B, and then controls the signal lamp through the execution module A or the execution module B; when the control module A has a fault, the controller B receives the instruction through the wireless communication module B, and then the execution module A or the execution module B controls the signal lamp. Whether the execution module is normal or not is detected by a sensor of the controller A or the controller B, wherein the execution module is considered to be abnormal due to insufficient battery power supply, damage of the lamp and damage of the execution module.
And content 3, which is a solution to the problem of dual-link communication and overall redundancy control, wherein the overall redundancy control is to process the control relationship of dual-core and two groups of signal lamp execution modules by dual-link communication, and actually, the content 1 is fused with the content 2.
In this embodiment, a certain control river reach is taken as an example to explain an implementation method, wherein 3 signal lamp placement points are set in the control river reach, a controller a establishes a network with a signal lamp remote control command center through a 4G/5G network, and performs instruction transmission through an Mqtt network protocol, a controller B receives an LoRa terminal covering the vicinity of three signal lamp arrangement points through an LoRa, and the LoRa instruction is from a terminal to receive an instruction of the signal lamp remote control command center through a wired network of an internet/local area network. Due to the complexity and importance of the channel, the requirement on control reliability is extremely high, the signal lamp arrangement place is far away and is not easy to be approached by people, the requirement on control stability is extremely high, the control command can be accurately executed, and quite long stability can be maintained, so that high redundancy between Mqtt and LoRa communication and the signal lamp controller is required. The redundancy implementation includes the following main scenarios:
scenario 1, device is not abnormal. Under normal conditions, the controller A directly receives the instruction on the Mqtt, the execution module A on the controller A is controlled, the signal lamp control is realized, and the controller B is only in the state of receiving the instruction.
Scenario 2, LoRa failure. At the moment, the controller A is not affected, the Mqtt can be normally used for communication and control, and the fault information of the controller B is issued through the Mqtt.
Scenario 3, execution module a fails. At this time, although the controller a can normally communicate, the signal lamp cannot be normally controlled, so that the execution module B on the controller B needs to be called for control, and at this time, Mqtt is still used for communication.
Scenario 4, Mqtt failure. At this time, communication using the controller a is not possible, but data communication is possible via the LoRa of the controller B, and the traffic light control is performed via the execution module a of the controller a.
Scenario 5, communication failure between controller a and controller B. At the moment, the controller A and the controller B do not monitor each other any more, the controller B defaults that the controller A is abnormal, the connection between the controller A and the execution module A/B is cut off, communication is carried out through LoRa, and the execution module A/B is called to control the lamp.
Scenario 6, other non-singles faults. In practical situations, there may be some non-single faults, and there are corresponding communication means and control methods, and the specific situations are shown in table 1.
TABLE 1 redundancy handling under Integrated Fault
Note: forced light turn off is a direct hardware turn off. In the table, "0" is normal; a "1" is an anomaly.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (4)
1. A dual link remote redundancy control system for traffic signal lights, characterized by: the system comprises a signal lamp remote control command center and a signal lamp control system;
the signal lamp remote control command center is provided with two communication devices with different communication modes for remote communication, wherein the two different communication modes are a communication mode A and a communication mode B;
the signal lamp control system comprises a controller A and a controller B;
the controller A consists of a communication module A, a battery A, a control module A and an execution module A; the controller B consists of a communication module B, a battery B, a control module B and an execution module B;
the communication module A and the communication module B correspond to the communication mode A and the communication mode B respectively, and the communication module A and the communication module B are used for communicating with the signal lamp remote control command center, receiving data sent by the signal lamp remote control command center and feeding back the data of the signal lamp control system to the signal lamp remote control command center.
2. The double-link remote redundancy control method for a traffic signal lamp based on the redundancy control system of claim 1, characterized in that: the method comprises the following steps:
s1: the controller A is communicated with the command center through the communication module A to process data; the controller B is communicated with the command center through the communication module B to process data; the controller A and the controller B carry out local communication through a data line and monitor each other;
s2: the execution module A or the execution module B receives the instruction of the control module A and executes the control signal of the signal lamp; the execution module A or the execution module B receives the instruction of the control module B and executes the control signal of the signal lamp; the execution module A and the execution module B can not work simultaneously, are only controlled by the control module A or the control module B at the same time, and are directly connected with the signal lamp;
s3: the controller A and the controller B work simultaneously under the normal working state of the signal lamp controller, and a communication network is established with the signal lamp remote control command center through the communication modules A and B respectively to receive instructions; the controller A and the controller B carry out information interaction and mutual monitoring, the controller A completes the control of the signal lamp, and the controller B only receives signals:
s4: when the communication module A in the controller A fails, the controller A switches to receive command center instructions forwarded by the controller B, and the controller A controls the signal lamp.
3. The dual link remote redundancy control method for a traffic signal according to claim 2, characterized in that: when the execution module A of the controller A fails, the controller A calls the execution module B, and the execution module B finishes the control of the signal lamp.
4. The dual link remote redundancy control method for a traffic signal according to claim 2, characterized in that: and when the control module A and the battery A of the controller A have faults, the signal lamp controller gives the control authority to the controller B, and the signal lamp controller finishes the control of the signal lamp through an instruction received by the communication B.
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