CN115097777A - Comprehensive information board warning system based on PLC system - Google Patents
Comprehensive information board warning system based on PLC system Download PDFInfo
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- CN115097777A CN115097777A CN202210684415.XA CN202210684415A CN115097777A CN 115097777 A CN115097777 A CN 115097777A CN 202210684415 A CN202210684415 A CN 202210684415A CN 115097777 A CN115097777 A CN 115097777A
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- 238000004891 communication Methods 0.000 claims abstract description 18
- 238000012544 monitoring process Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
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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
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
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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
- G05B2219/10—Plc systems
- G05B2219/14—Plc safety
- G05B2219/14006—Safety, monitoring in general
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- Automation & Control Theory (AREA)
- Alarm Systems (AREA)
Abstract
The invention relates to a comprehensive information board warning system based on a PLC system, which comprises a monitoring center, a tunnel box-type substation, a variable information board, a variable speed limit sign and a lane indicator, wherein the tunnel box-type substation is provided with a primary PLC, a plurality of secondary PLCs are arranged in a tunnel, the primary PLC and the secondary PLCs are provided with local CPUs (central processing units), the primary PLC and the secondary PLCs use a double-ring network architecture and form a PLC ring network, and the primary PLC and the secondary PLCs communicate in an Ethernet communication mode; the variable information board, the variable speed limit sign and the lane indicator are respectively connected to the corresponding two-stage PLC to realize local control, and the variable information board and the variable speed limit sign are respectively connected to the PLC ring network through network interfaces to realize remote control. According to the invention, the primary PLC and the secondary PLC are arranged in the tunnel, and the three-level control mode of the variable information board is adopted, so that the tunnel is prevented from being out of control due to network disconnection, and the tunnel safety is enhanced.
Description
Technical Field
The invention relates to the technical field of highway tunnels, in particular to a comprehensive information board warning system based on a PLC system.
Background
The tunnel monitoring system is an indispensable system in the highway industry. Because the tunnel has the characteristics of high tightness, high danger and the like, if advanced monitoring management measures are not adopted, traffic accidents and traffic jam are easy to happen under the conditions of large traffic volume and bad weather. Therefore, for remote monitoring and control of the state in the tunnel, real-time information board display and warning of the tunnel environment are always the key points of research in the highway industry. Therefore, the comprehensive information board warning system based on the PLC system is researched, the problem that the tunnel is out of control due to network disconnection can be prevented, and the tunnel safety is enhanced.
Disclosure of Invention
The present invention is directed to solve the above problems, and provides a PLC system-based integrated information board alarm system.
In order to achieve the purpose, the invention adopts the following technical scheme: a comprehensive information board warning system based on a PLC system comprises a monitoring center, a tunnel box-type substation, a variable information board, a variable speed limit mark and a lane indicator, wherein the tunnel box-type substation is provided with a first-stage PLC, a plurality of second-stage PLCs are arranged in a tunnel, the first-stage PLC and the second-stage PLCs are respectively provided with a local CPU, the first-stage PLC and the second-stage PLCs use a double-ring network architecture and form a PLC ring network, and the first-stage PLC and the second-stage PLCs communicate in an Ethernet communication mode; the variable information board, the variable speed limit sign and the lane indicator are respectively connected with the corresponding two-stage PLC to realize local control, the variable information board is arranged in front of the tunnel, the variable speed limit sign is arranged one thousand meters in front of the tunnel, the lane indicator is arranged at the tunnel portal, and the variable information board and the variable speed limit sign are respectively connected with the PLC ring network through network interfaces to realize remote control;
the first-level PLC, the second-level PLC and the variable information board are respectively connected with the monitoring center, the variable information board, the variable speed limit mark and the lane indicator control program are compiled in the second-level PLC, and the variable information board is divided into three-level control modes: a second-level PLC control mode; a first-stage PLC control mode; a monitoring center remote control mode; writing variable information board, variable speed limit sign and lane indicator control program in the first-level PLC, and dividing the variable information board into two-level control mode: a first-stage PLC control mode; and a monitoring center remote control mode.
Particularly, the variable information board is connected to the secondary control PLC through RS485 communication, and a plurality of emergency alarm display pictures are stored in a local memory of the variable information board.
Particularly, the variable speed limit sign is accessed to the secondary control PLC through RS485 communication, and a plurality of speed limit information pictures are stored in a local memory of the variable speed limit sign.
In particular, the lane indicator is hard wired into the I/O module of the secondary control PLC.
The invention has the beneficial effects that: the invention sets a first-stage PLC and a second-stage PLC in the tunnel, and can change the three-stage control mode of the information board, thereby preventing the tunnel from being out of control due to network disconnection. Under the condition of good network communication, the monitoring center software is used for controlling, when the monitoring center network is abnormally disconnected, the primary PLC is used for warning switching, and if special conditions occur, the secondary PLC is used for warning switching, so that the tunnel safety is enhanced.
Detailed Description
The invention is further illustrated by the following examples:
a comprehensive information board warning system based on a PLC system comprises a monitoring center, a tunnel box-type substation, a variable information board, a variable speed limit mark and a lane indicator, wherein the tunnel box-type substation is provided with a first-stage PLC, a plurality of second-stage PLCs are arranged in a tunnel, the first-stage PLC and the second-stage PLCs are provided with local CPUs, the first-stage PLC and the second-stage PLCs use a double-ring network architecture and form a PLC ring network, the first-stage PLC and the second-stage PLCs communicate in an Ethernet communication mode, the first-stage PLC and the second-stage PLCs can adopt Siemens S7-200 series PLCs, and the CPUs can adopt CPU2266ES7216-2BD23-0XB0 models.
The variable information board is arranged in front of the tunnel and is accessed to the PLC ring network through a network interface to realize remote control; the secondary control PLC is accessed through RS485 communication to realize local control; the local memory of the variable information board stores several emergency alarm display pictures, and the number of the emergency alarm display pictures is not less than 20.
The variable speed limit sign is arranged one thousand meters before the tunnel and is accessed into the PLC ring network through a network interface to realize remote control; the secondary control PLC is accessed through RS485 communication to realize local control; a plurality of speed limit information pictures are stored in a local memory of the variable speed limit sign, and the number of the speed limit information pictures is not less than 5.
The lane indicator is installed at the tunnel entrance and is connected to an I/O module of the secondary control PLC through hard wiring, so that the control of the lane indicator is realized.
The first-level PLC, the second-level PLC and the variable information board are respectively connected with the monitoring center, the variable information board, the variable speed limit mark and the lane indicator control program are compiled in the second-level PLC, and the variable information board is divided into three-level control modes: a secondary PLC control mode (which is started when the primary PLC loses connection); a primary PLC control mode (open when the primary PLC is normally connected); a monitoring center remote control mode;
writing variable information board, variable speed limit sign and lane indicator control program in the first-level PLC, and dividing the variable information board into two-level control mode: a primary PLC control mode (open when connected normally to a secondary PLC); and a monitoring center remote control mode.
When the monitoring center is in a remote control mode, the variable information board can be put in and switched through the PLC looped network through the preset variable information board control software on the host computer of the monitoring center; when the monitoring center selects the PLC automatic control mode, the first-stage PLC control mode is started, the first-stage PLC can automatically judge the display information of the variable information board according to the data acquired in the tunnel and carry out switching through RS485 communication, and warning and early warning are carried out if abnormity occurs; when the second-stage PLC is disconnected with the first-stage PLC and the monitoring center, the second-stage PLC control mode is started when the second-stage PLC is considered to have major faults in the tunnel, and the variable information board is switched into danger warning information through RS485 communication to forbid warning of vehicles coming and going.
The three-level early warning switching process of the variable information board is as follows:
the primary PLC and the secondary PLC are communicated with the monitoring center in real time and are used for logical judgment of a control layer of the variable information board; the first-level PLC and the second-level PLC are in real-time communication and are used for logical judgment of a control level of the information board.
(1) When the variable information board, the first-level PLC, the second-level PLC and the monitoring center are in normal communication through the PLC ring network, the system is judged to be in a remote control mode of the monitoring center, and the monitoring center directly controls information switching of the variable information board through variable information board control software.
(2) When the variable information board, the first-level PLC and the second-level PLC are disconnected with the monitoring center, the automatic judgment in the system is switched to a first-level PLC control mode, and a program in the first-level PLC responds. And the primary PLC switches the information of the real-time variable information board by taking the real-time monitoring data acquired in the tunnel as a judgment basis. When receiving fire alarm signals, video warning signals of a camera and abnormal signals of environment detection data in the tunnel, the primary PLC switches warning signals of the variable information board through RS485 communication and issues the warning signals, the variable speed limit mark is switched to 20km/h, the lane indicator switches the high-speed lane to red, and green running of the low-speed lane is forbidden.
(3) When the first-stage PLC is disconnected with the second-stage PLC, the control mode of the second-stage PLC is automatically judged in the system, and a program in the second-stage PLC responds. Due to the fact that the field condition is that the network connection with the monitoring center is disconnected and the PLC ring network in the tunnel is disconnected, it is judged that abnormal conditions such as fire disasters and collapse exist, and the tunnel belongs to an out-of-control state. The second-level PLC switches the warning signals of the variable information board through RS485 communication and issues the warning signals, the variable speed limit mark is switched to be 0km/h, and the lane indicator switches the high-speed lane and the low-speed lane to be red and forbidden simultaneously.
The invention sets a first-stage PLC and a second-stage PLC in the tunnel, and can change the three-stage control mode of the information board, thereby preventing the tunnel from being out of control due to network disconnection. Under the condition of good network communication, the monitoring center software is used for controlling, when the monitoring center network is abnormally disconnected, the primary PLC is used for warning switching, and if special conditions occur, the secondary PLC is used for warning switching, so that the tunnel safety is enhanced.
The invention has been described in an illustrative manner, and it is to be understood that the invention is not limited to the specific embodiments described, and that various modifications may be made without departing from the spirit and scope of the invention.
Claims (4)
1. A comprehensive information board warning system based on a PLC system comprises a monitoring center, a tunnel box-type substation, a variable information board, a variable speed limit sign and a lane indicator, and is characterized in that the tunnel box-type substation is provided with a primary PLC, a plurality of secondary PLCs are arranged in a tunnel, the primary PLC and the secondary PLCs are provided with local CPUs (central processing units), the primary PLC and the secondary PLCs use a double-ring network architecture and form a PLC ring network, and the primary PLC and the secondary PLCs communicate in an Ethernet communication mode; the variable information board, the variable speed limit sign and the lane indicator are respectively connected with the corresponding two-stage PLC to realize local control, the variable information board is arranged in front of the tunnel, the variable speed limit sign is arranged one thousand meters in front of the tunnel, the lane indicator is arranged at the tunnel portal, and the variable information board and the variable speed limit sign are respectively connected with the PLC ring network through network interfaces to realize remote control;
the first-level PLC, the second-level PLC and the variable information board are respectively connected with the monitoring center, the variable information board, the variable speed limit mark and the lane indicator control program are compiled in the second-level PLC, and the variable information board is divided into three-level control modes: a second-stage PLC control mode; a first-stage PLC control mode; a monitoring center remote control mode; writing variable information board, variable speed limit sign and lane indicator control program in the first-level PLC, and dividing the variable information board into two-level control mode: a first-stage PLC control mode; and a monitoring center remote control mode.
2. The integrated message board alarm system based on PLC system as claimed in claim 1, wherein the variable message board is connected to the secondary control PLC through RS485 communication, and a plurality of emergency alarm display pictures are stored in the local memory of the variable message board.
3. The integrated intelligence board alarm system based on PLC system of claim 2, wherein the variable speed limit sign is accessed to the secondary control PLC through RS485 communication, and a plurality of speed limit information pictures are stored in the local memory of the variable speed limit sign.
4. The integrated intelligence board alarm system of claim 3, wherein the lane indicator is hard wired into the I/O module of the secondary control PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210684415.XA CN115097777A (en) | 2022-06-16 | 2022-06-16 | Comprehensive information board warning system based on PLC system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210684415.XA CN115097777A (en) | 2022-06-16 | 2022-06-16 | Comprehensive information board warning system based on PLC system |
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| CN115097777A true CN115097777A (en) | 2022-09-23 |
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| CN202210684415.XA Pending CN115097777A (en) | 2022-06-16 | 2022-06-16 | Comprehensive information board warning system based on PLC system |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1753048A (en) * | 2004-09-24 | 2006-03-29 | 上海电器科学研究所（集团）有限公司 | Express highway traffic monitoring system |
| CN103197645A (en) * | 2013-04-03 | 2013-07-10 | 昆明联诚科技有限公司 | Expressway programmable logic controller (PLC) tunnel monitoring system |
| US8548607B1 (en) * | 2008-11-03 | 2013-10-01 | Autani Corp. | Automation system network management, architectures, and methods and applications thereof |
| CN203561873U (en) * | 2013-11-25 | 2014-04-23 | 安徽皖通科技股份有限公司 | Highway PLC tunnel monitoring system |
| CN105114112A (en) * | 2015-07-14 | 2015-12-02 | 安徽皖通科技股份有限公司 | Tunnel fire-fighting system |
| CN106228484A (en) * | 2016-07-14 | 2016-12-14 | 河北上元工控技术有限公司 | A kind of medium tunnel intelligent total management system and management method |
| CN111720168A (en) * | 2020-06-15 | 2020-09-29 | 河南隧安智能科技有限公司 | Regional control center for highway tunnel electromechanical facility comprehensive management and control system |
| CN113299067A (en) * | 2021-05-24 | 2021-08-24 | 上海市政工程设计研究总院（集团）有限公司 | Tunnel access & exit safety control system based on video perception technology |
-
2022
- 2022-06-16 CN CN202210684415.XA patent/CN115097777A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1753048A (en) * | 2004-09-24 | 2006-03-29 | 上海电器科学研究所（集团）有限公司 | Express highway traffic monitoring system |
| US8548607B1 (en) * | 2008-11-03 | 2013-10-01 | Autani Corp. | Automation system network management, architectures, and methods and applications thereof |
| CN103197645A (en) * | 2013-04-03 | 2013-07-10 | 昆明联诚科技有限公司 | Expressway programmable logic controller (PLC) tunnel monitoring system |
| CN203561873U (en) * | 2013-11-25 | 2014-04-23 | 安徽皖通科技股份有限公司 | Highway PLC tunnel monitoring system |
| CN105114112A (en) * | 2015-07-14 | 2015-12-02 | 安徽皖通科技股份有限公司 | Tunnel fire-fighting system |
| CN106228484A (en) * | 2016-07-14 | 2016-12-14 | 河北上元工控技术有限公司 | A kind of medium tunnel intelligent total management system and management method |
| CN111720168A (en) * | 2020-06-15 | 2020-09-29 | 河南隧安智能科技有限公司 | Regional control center for highway tunnel electromechanical facility comprehensive management and control system |
| CN113299067A (en) * | 2021-05-24 | 2021-08-24 | 上海市政工程设计研究总院（集团）有限公司 | Tunnel access & exit safety control system based on video perception technology |
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