CN113820977B - Double-chain remote redundancy control system and method for signal lamp - Google Patents

The invention relates to a double-chain remote redundancy control system and method for a signal lamp, and belongs to the field of intelligent traffic. The method comprises the following steps: the signal lamp control system is based on control of a dual-core (A, B controller), and controls two paths of signal lamp execution modules (A, B) by receiving command data of command center dual-link communication (A, B communication), wherein the redundancy control method dynamically selects A or B controllers, dynamically selects A or B communication and dynamically selects A or B to execute, so that signal lamp redundancy control is formed; the reliability and the controllability of remote control of the signal lamp under the scenes of power supply, limited communication and the like are improved.

Double-chain remote redundancy control system and method for signal lamp

Technical Field

The invention belongs to the field of intelligent traffic, and relates to a double-chain remote redundancy control system and method for a signal lamp.

Background

The traffic signal lamp is a signal lamp for directing traffic to run, and indicates whether vehicles, pedestrians, ships and the like pass or not according to the combination of different lights, colors, shapes and the like. Traffic lights typically display different lights, combinations, etc. according to control instructions from a command center to achieve traffic control. Whether the traffic signal lamp can work reliably is mainly influenced by power supply, communication, light control and the like. Particularly, in the case of a remote position, a inland river part channel with severe environment, limited communication and limited power supply is arranged like a control river section, a command instruction is received to control a signal lamp with a lamp on, a flashing frequency and the like, and under the conditions of no wired communication, commercial power and the like, how to ensure reliable operation of the signal lamp is important.

Disclosure of Invention

Accordingly, the present invention is directed to a dual-link redundancy control system and method for signal lamps.

In order to achieve the above purpose, the present invention provides the following technical solutions:

A double-chain remote redundancy control system for traffic lights, the system comprising a signal remote control command center and a signal 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 are respectively corresponding to the communication mode A and the communication mode B, and 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 communicates 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 cannot 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: under the normal working state of the signal lamp controller, the controller A and the controller B work simultaneously, a communication network is established with a signal lamp remote control command center through the communication module A and the communication module B respectively, and an instruction is received; the controller A and the controller B perform information interaction and monitor each other, 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 and receives command center commands forwarded by the controller B, and the controller A finishes the control of the signal lamp.

Optionally, when the execution module a of the controller a fails, the controller a will call the execution module B, and the execution module B completes the control of the signal lamp.

Optionally, when the control module a and the battery a of the controller a fail, the signal lamp controller gives control authority to the controller B, and the signal lamp is controlled by the 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 unmanned traffic signal lamps, and realizes the remote control of the signal lamps 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 objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:

fig. 1 is a schematic diagram of a signal lamp controller according to the present invention;

FIG. 2 is a flow chart of a dual-link communication and dual-core redundancy control problem solution provided by the present invention;

FIG. 3 is a flow chart of a solution to the problem of redundant control of a dual-link communication and two sets of signal lamp execution modules provided by the present invention;

FIG. 4 is a schematic diagram of a duplex 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 of the present invention.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated 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 numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.

Please refer to fig. 1-5.

Content 1, which is a redundant control problem solution of double-link communication and double-control core, the signal lamp controller is composed of a controller A and a controller B. The controller A is provided with a wireless communication module A, and takes a communication link A as a main communication mode to carry out remote domain wireless communication; the controller B carries a wireless communication module B and performs local wireless communication using the communication link B as a backup wireless communication scheme. Under normal conditions, the controller A uses the wireless communication module A as a main route for receiving instructions of the signal lamp controller, and the controller B uses the instructions on the communication link B as a backup route for receiving instructions of the signal lamp controller through the wireless communication module B, but the controller B and the controller A perform 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 the communication link A is interrupted and has no signal and the like, the controller A acquires the instruction received by the controller B until the wireless communication module A is recovered to be normal; when the control module A fails, the controller B receives the instruction through the wireless communication module B and controls the signal lamp through the execution module A or B until the control module A returns to normal.

Content 2, which is a solution to the problem of redundant control of the double-link communication and two groups of signal lamp execution modules A, B, wherein the controller A and the controller B are both connected with the signal lamp execution module A and the signal lamp execution module B; the execution module B is standby for the execution module A. Under normal conditions, the signal lamp controller receives an instruction from a command center through the wireless communication module A by the controller A, and the signal lamp is turned on and blinks through the execution module A; under the condition that the execution module A fails, the controller A receives an instruction through the wireless communication module A, and the signal lamp is turned on and blinks through 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 the signal lamp is controlled by the execution module A or the execution module B; when the control module A fails, the controller B receives an instruction through the wireless communication module B, and then controls the signal lamp through the execution module A or the execution module B. Whether the execution module is normal or not is detected by a sensor of the controller A or the controller B, wherein, the condition that the battery is not enough, the lamp is damaged and the execution module is damaged is regarded as abnormal.

And content 3 is a solution to the problem of double-link communication and integral redundancy control, wherein the integral redundancy control is to process the control relation of double-link communication to the execution modules of the double-core and the two groups of signal lamps, and is the fusion of content 1 and content 2.

In the embodiment, the implementation method is illustrated by taking a certain control river reach as an example, 3 signal lamp placement points are set up in the control river reach, a controller A establishes a network with a signal lamp remote control command center through a 4G/5G network, command transmission is performed through Mqtt network protocols, a controller B receives LoRa terminals covering the vicinity of three signal lamp placement points through LoRa, and the LoRa commands come from the terminals to receive the commands of the signal lamp remote control command center through a wired network of the Internet/local area network. Due to the complexity and importance of the channel, the requirements for control reliability are extremely high, the signal lamp arrangement sites are far away and personnel are not easily accessible, the requirements for control stability are extremely high, it is necessary to ensure that control commands can be accurately carried out, and quite long stability can be maintained, so that Mqtt and LoRa communication are required to be highly redundant with the signal lamp controller. The redundant implementation includes the following main scenarios:

scenario 1, no device anomaly. Under normal conditions, the controller A receives the command on Mqtt directly, and controls the execution module A on the controller A to realize signal lamp control, and the controller B is only in a command receiving state.

Scenario 2, lora failure. At this time, the controller a is not affected, and can communicate and control as normal as Mqtt, and at this time, the fault information of the controller B is issued through Mqtt.

Scenario 3, execute module a failure. 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 to control, and at this time, mqtt is still used for communication.

Scenario 4, mqtt failure. At this time, the controller a cannot be used for communication, but the controller B can be used for data communication through the LoRa of the controller B, and the signal lamp control is performed through the execution module a of the controller a.

Scenario 5, communication failure between controller a and controller B. At this time, 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 invoked to control the lamp.

Scenario 6, other non-single failures. In practice, there may be a non-single fault, and there are corresponding communication means and control means, and the specific cases are shown in table 1.

Table 1 redundancy handling under integrated failure

Note that: forced turning off the lamp is a direct turn-off on hardware. In the table, "0" is normal; "1" is an anomaly.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.