CN101644920A - Control method of embedded station information collector system - Google Patents
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Abstract
The invention relates to a control method of an embedded station information collector system, comprising the following steps: a PLC communication module and an A/D I/O module are utilized to collectstate data from field equipment; control logical operation is executed through a control process module; the state data after treatment exchanges data with an upper dispatching management system through an OPC communication module and an SNMP communication module, and receives a control command output by the upper dispatching management system to I/O equipment; and the control command is transferred to the field equipment through the PLC communication module or the A/D I/O module. Compared with the prior art, the invention has the advantages that aiming to the requirements of automation, networking, informatization, standardization and intellectualization of operation, management and maintenance in the field of rail traffic, the control method adopts an embedded technology, establishes a networking information sharing platform, provides a solution of monitoring and maintaining centralizing equipment facing to clients, and enhances the coping ability of an emergency event.
Description
Technical Field
The invention relates to the field of rail transit, in particular to a control method of an embedded station information collector system.
Background
The rail transit operation enters a networking era, and provides a challenge for operation management, namely changing from single-line operation to network operation. In recent years, cities such as beijing, shanghai and guangzhou have also developed from the pure construction of a certain subway line to the direction of urban rail transit networks.
Along with the construction of urban rail networks, the problems of resource sharing and interconnection and intercommunication of urban rails are also brought up to the schedule. At present, in cities where urban rail transit lines are already or currently constructed in China, core products and technologies of station equipment monitoring systems are basically introduced from abroad, system systems and suppliers of each line are different, especially in existing transfer stations, communication interfaces and data standards for collecting data are not uniform, information transmission and sharing are not facilitated, and the situation directly influences urban rail networking development.
From the operation of the rail transit company, interconnection and intercommunication among all lines are also needed to achieve uniform allocation of operators of all lines, uniform maintenance method of equipment of all lines and universal maintenance spare parts, namely, resource sharing is realized, so that the transportation efficiency can be improved and the operation cost can be reduced. The unification or compatibility of the system types of the urban rail transit station equipment monitoring system becomes a development trend.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a safe and reliable control method of an embedded station information collector system.
The purpose of the invention can be realized by the following technical scheme: the control method of the embedded station information collector system is characterized by comprising the following steps:
(1) collecting state data from the field device by using the PLC communication module and the A/D I/O module;
(2) executing control logic operation through a control process module;
(3) the processed state data exchanges data with an upper-layer scheduling management system through an OPC communication module and an SNMP communication module, and receives a control instruction output to I/O equipment by the upper-layer scheduling management system;
(4) the control commands are communicated to the field devices via the PLC communication module or the A/D I/O module.
The PLC communication module provides related services for reading and writing of the PLC register, and calls related API functions and reads or sets data of the PLC register by reading the configuration file according to the product model, the memory address and the length specified by the configuration file.
The A/D I/O module collects field signals or outputs control signals, and the A/D I/O module comprises analog quantity input equipment, analog quantity output equipment, switching value input equipment and switching value output equipment.
The control process module caches and preprocesses the read data, and comprises the following steps:
(1) sub-module of filtering function
For the switching value, processing the whole data once when the system is started, then processing the changed data if the system is changed, and processing the whole data once at fixed time;
for analog quantity, processing all data once when a system is started, filtering burrs, processing changed data if changes occur, and processing all data once at fixed time;
(2) avalanche filtering function submodule
When the facility or equipment is turned on or off, all relevant alarm or limit switching and analog variable changing state values are filtered to prevent avalanche of foreseeable events and provide programmable support.
The OPC communication module realizes OPC Server and OPC Client at the same time, so that the embedded station information collector has complete OPC communication capability.
The SNMP communication module realizes the SNMP Agent and the SNMP Server at the same time, so that the embedded station information collector has complete SNMP communication capability.
Compared with the prior art, the invention has the advantages that aiming at the requirements of automation, networking, informatization, standardization and intellectualization of operation, management and maintenance in the field of rail transit, an embedded technology is adopted, a networked information sharing platform is established, a solution for monitoring and maintaining centralized equipment facing customers is provided, the coping capability of emergency accidents is improved, the safety, reliability and practicability of rail transit station equipment operation are improved, and the overall operation efficiency and service quality of rail transit are improved.
Drawings
Fig. 1 is a working schematic diagram of a control method of an embedded station information collector system according to the present invention;
FIG. 2 is a field connection diagram of the embedded station information collector of the present invention;
fig. 3 is a block diagram of a hardware structure of the embedded station information aggregator according to the present invention;
fig. 4 is a software module diagram of a control method of the embedded station information aggregator system according to the present invention.
Detailed Description
The present invention is further illustrated by the following specific examples.
As shown in fig. 1, the working principle of the control method of the embedded station information collector system is that the embedded technology and standard communication media and protocols are used as an application gateway of a general rail transit station equipment monitoring system to realize homogenization of bottom-layer heterogeneous equipment for use by an upper-layer scheduling management system, and to provide technical support for information interconnection and intercommunication for network operation management of rail transit.
Specifically, the functions of the embedded station information collector can be summarized into functions of collecting I/O data, controlling operation, outputting I/O data and the like, and the embedded station information collector comprises auxiliary functions, such as a self-diagnosis function and the like.
The acquisition and output of the I/O data are realized by an embedded station information collector according to configuration, and the state information of the field equipment is acquired by accessing PLC equipment or directly accessing field intelligent I/O equipment, and an equipment control instruction is issued. And carrying out corresponding data preprocessing process on the acquired I/O signals, carrying out quality judgment on the signals, filtering and converting the signals into engineering values with standard dimensions, and outputting the engineering values to an upper-layer scheduling management system for use through a standard interface protocol. See figure 2. Wherein,
the interface between the embedded station information collector and the upper system adopts an Ethernet interface for communication; for the equipment state acquisition with higher real-time requirement, a standard SNMP protocol is adopted for information transmission; for the equipment control command with higher reliability requirement, the standard OPC protocol is adopted to transmit information;
the embedded station information collector and the field PLC device are mainly communicated by adopting Ethernet, and support protocols such as Ethernet IP, Modbus TCP/IP, CIP and the like. Meanwhile, a standard OPC interface is provided for being compatible with most PLCs on the market at present and is used for communicating with PLC equipment.
And the slow RS232/485/422 equipment can be directly connected to the embedded station information collector. Or the interface is converted into an Ethernet interface through a protocol converter, and corresponding OPC or DDE driving software is used for accessing the embedded station information aggregator.
The embedded station information collector can be accessed to the field bus for communication through a field bus type communication board card and OPC or DDE driving software. Such as DeviceNet from Omron, Profibus from Siemens, and the like.
The whole embedded station information aggregator is based on an X86 architecture, adopts a CPCI bus, and is formed by main components as shown in figure 3. The industrial bus communication device comprises a main control module (comprising an X86 compatible 64-bit microprocessor and a DRAM), a storage module (comprising an industrial CF card), a power supply module (adopting 220V alternating current input and 5V direct current output), an Ethernet communication module (used for providing an Ethernet interface), a serial port communication module (providing various interfaces such as 232, 422 and 485), and the like, and can expand an industrial bus communication module as required and provide an industrial bus communication interface.
Due to the adoption of the CPCI bus, the communication module can be expanded according to the number of points required to be collected by the field device.
The Embedded station information collector adopts a Windows XP Embedded operating system, adopts standard C + + for development and supports cross-platform transplantation (including Reworks, Linux, VxWorks and the like).
The embedded station information collector adopts a layered structure design, completely encapsulates the application program of the upper layer and the interfaces related to hardware and an operating system, and abstracts the actual different drivers of the bottom layer into a unified interface of the upper layer. Hardware change or operating system change only needs to change the interior of the hardware dependent interface, thus meeting the requirement that the program runs on different operating systems, and adopting a uniform interface under different systems.
The main working principle is as follows: the PLC communication module and the A/D I/O module are used for collecting state data from the field devices, and then the control logic operation is executed through the control process module. The processed state data exchanges data with the upper-layer scheduling management system through the OPC communication module and the SNMP communication module, and receives a control instruction output to the I/O equipment by the upper-layer scheduling management system. The control command will ultimately be communicated to the field device via either the PLC communication module or the a/D I/O module.
A software structure diagram of the embedded station information aggregator is shown in fig. 4. Wherein,
PLC communication module
The PLC register reading and writing system is used for providing related services of PLC register reading and writing. And calling a related API function and reading or setting data of the PLC register by reading the configuration file according to the product model, the memory address and the length specified by the configuration file.
A/D I/O module
The device is used for collecting field signals or outputting control signals (and other mixed signal type Input and Output devices or special I/O devices), and mainly comprises Analog Input devices (AI), Analog Output devices (AO), switching value Input Devices (DI) and switching value Output Devices (DO).
Control process module
The data cache and preprocessing device is responsible for caching and preprocessing read-in data and mainly comprises the following components:
(1) filter function
For the switching value, the whole data is processed once when the system is started, then the changed data is processed in a changing way, and the whole data is processed once at fixed time.
For the analog quantity, the whole data is processed once when the system is started, burrs are filtered, then the changed data is processed in a variable mode, and the whole data is processed once at fixed time.
(2) Avalanche filtering function
When the facility or equipment is turned on or off, all relevant alarm or limit switching and analog variable changing state values are filtered to prevent avalanche of foreseeable events and provide programmable support.
OPC communication module
Simultaneously realizes OPC Server and OPC Client, so that the embedded station information collector has complete OPC communication capability
SNMP communication module
Simultaneously realizes the SNMP Agent and the SNMP Server, so that the embedded station information collector has complete SNMP communication capability
Remote diagnostic configuration module
The equipment running state information is released in a WEB form, and whether the fan of the embedded station information collector stops running or not, the running state of a system and the like can be checked through the diagnosis interface; and performs system control functions such as remote restart of the system.
Meanwhile, whether the PLC connected with the embedded station information collector works normally, relevant logs and the like can be checked.
Watchdog module
And monitoring the running condition of the embedded station information collector, and automatically processing the abnormal condition. For example, after the relevant collection process exits abnormally, the process is restarted, and relevant logs are recorded.
In the construction process of the traditional urban rail transit equipment monitoring system, the traditional PLC controller and a microcomputer monitoring system are basically adopted, the monitoring system is high in construction cost and relatively closed, and because equipment monitoring relates to different equipment of various manufacturers and communication protocols and the like are different, communication interfaces and data standards for collecting data in the traditional system are not uniform, and information transmission and sharing are not facilitated.
After the rail transit rises to the level of comprehensive monitoring, the monitoring range of the equipment is greatly expanded, the total class and the quantity of the equipment are greatly increased, and the acquisition becomes more complex.
Meanwhile, the rail transit is in multi-level net-shaped distribution, the situation that a transfer station runs a plurality of lines simultaneously appears, and the operation of the rail transit faces unprecedented challenges. Under original monitoring mode, different monitoring systems are adopted for different lines, and problems occur in monitoring linkage of a plurality of lines. Under the new urban rail transit development situation, the monitoring requirement of rail transit station equipment is suitable for new requirements of networking, integration, specialization and multiple users.
Example 1
The embedded station information collector adopts default configuration and comprises the following steps:
1. power supply module
Indexes are as follows: input voltage: 220VAC +/-20%
Output voltage: +5V
Output current: > 10A
Ripple voltage: < 50Mv
2. CPU module
Intel embedded CeleronM CPU 1G, 85XGME chip set
Table pastes 512M internal memory
Onboard 1 10/100M and 1 10/100/1000M Ethernet cards
Support post-egress bus IO expansion
High reliability, low power consumption, fan-less design
Anti-surge and electrostatic protection design
Conforms to the PICMG 2.0R3.0 specification
3. Serial port module
Two serial port cards each supporting 4 serial ports
The back wiring board photoelectric isolation serial port supports RS232/485/422 function selection
Anti-surge and electrostatic protection design
Conforms to the PICMG 2.0R3.0 specification
4. CPCI backboard
Support for at most five PCI bus extensions
Support post-egress bus IO expansion
Conforms to the PICMG 2.0R3.0 specification
Working temperature range: 25 to 75 DEG below zero
Ripple waves: < 50Mv
And (3) surge: grade 3
5. STBY unit
3U card insertion design
Support post-egress bus IO expansion
Support minimum 32 relay I/O switching
The upper-layer scheduling management system is developed by adopting KingView configuration software, is connected to the embedded station information collector through the Ethernet and carries out communication through an OPC (optical proximity correction) protocol.
The embedded station information collector is connected to on-site lighting equipment and the like through a Schneider PLC (Modbus protocol communication) connected with the on-site.
From the field use effect, the embedded station information collector works well, completely meets the application gateway serving as a general rail transit station equipment monitoring system, and realizes the homogenization of bottom-layer heterogeneous equipment by using an embedded technology and standard communication media and protocols for an upper-layer scheduling management system.
Claims (6)
1. The control method of the embedded station information collector system is characterized by comprising the following steps:
(1) collecting state data from the field device by using the PLC communication module and the A/D I/O module;
(2) executing control logic operation through a control process module;
(3) the processed state data exchanges data with an upper-layer scheduling management system through an OPC communication module and an SNMP communication module, and receives a control instruction output to I/O equipment by the upper-layer scheduling management system;
(4) the control commands are communicated to the field devices via the PLC communication module or the A/D I/O module.
2. The control method of the embedded station information aggregator system according to claim 1, wherein the PLC communication module provides related services for PLC register read-write, calls related API functions according to product model and memory address and length specified by the configuration file by reading the configuration file, and reads or sets data of the PLC register.
3. The control method of the embedded station information aggregator system according to claim 1, wherein said a/D I/O module collects field signals or outputs control signals, and said a/D I/O module comprises analog input device, analog output device, switching input device, switching output device.
4. The control method of the embedded station information aggregator system according to claim 1, wherein the control process module caches and preprocesses the read data, comprising:
(1) sub-module of filtering function
For the switching value, processing the whole data once when the system is started, then processing the changed data if the system is changed, and processing the whole data once at fixed time;
for analog quantity, processing all data once when a system is started, filtering burrs, processing changed data if changes occur, and processing all data once at fixed time;
(2) avalanche filtering function submodule
When the facility or equipment is turned on or off, all relevant alarm or limit switching and analog variable changing state values are filtered to prevent avalanche of foreseeable events and provide programmable support.
5. The control method of the embedded station information aggregator system according to claim 1, wherein said OPC communication module simultaneously implements OPC Server and OPC Client, so that the embedded station information aggregator has complete OPC communication capability.
6. The control method of the embedded station information aggregator system according to claim 1, wherein said SNMP communication module implements both SNMP Agent and SNMP Server, making the embedded station information aggregator have complete SNMP communication capability.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102215132A (en) * | 2011-06-16 | 2011-10-12 | 奥维通信股份有限公司 | Embedded SNMP (Simple Network Management Protocol) management end data collecting device, system and method based on database |
| CN103107913A (en) * | 2011-11-11 | 2013-05-15 | 中国北车股份有限公司大连电力牵引研发中心 | Train fault recording device and method |
| CN103777575A (en) * | 2012-10-18 | 2014-05-07 | 中国电信股份有限公司 | Monitoring management method and monitoring management system for fresh air system |
| CN104852845A (en) * | 2015-03-11 | 2015-08-19 | 佛山职业技术学院 | Internet of Things intelligent gateway |
| CN109709874A (en) * | 2019-01-21 | 2019-05-03 | 常州鸣轩自动化设备有限公司 | A kind of subway comprehensive monitoring system intelligent gateway |
| CN112379611A (en) * | 2019-10-22 | 2021-02-19 | 北京城建智控科技有限公司 | Environment monitoring control equipment |
| CN112583876A (en) * | 2019-09-30 | 2021-03-30 | 比亚迪股份有限公司 | Station management method, station management device, electronic equipment and storage medium |
| CN114326567A (en) * | 2021-12-20 | 2022-04-12 | 安徽中科大国祯信息科技有限责任公司 | Automatic process equipment data conversion and instruction remote issuing method |
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2009
- 2009-06-30 CN CN200910054233A patent/CN101644920A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102215132A (en) * | 2011-06-16 | 2011-10-12 | 奥维通信股份有限公司 | Embedded SNMP (Simple Network Management Protocol) management end data collecting device, system and method based on database |
| CN103107913A (en) * | 2011-11-11 | 2013-05-15 | 中国北车股份有限公司大连电力牵引研发中心 | Train fault recording device and method |
| CN103777575A (en) * | 2012-10-18 | 2014-05-07 | 中国电信股份有限公司 | Monitoring management method and monitoring management system for fresh air system |
| CN104852845A (en) * | 2015-03-11 | 2015-08-19 | 佛山职业技术学院 | Internet of Things intelligent gateway |
| CN104852845B (en) * | 2015-03-11 | 2018-03-16 | 佛山职业技术学院 | A kind of intelligent networking gateway |
| CN109709874A (en) * | 2019-01-21 | 2019-05-03 | 常州鸣轩自动化设备有限公司 | A kind of subway comprehensive monitoring system intelligent gateway |
| CN112583876A (en) * | 2019-09-30 | 2021-03-30 | 比亚迪股份有限公司 | Station management method, station management device, electronic equipment and storage medium |
| CN112379611A (en) * | 2019-10-22 | 2021-02-19 | 北京城建智控科技有限公司 | Environment monitoring control equipment |
| CN114326567A (en) * | 2021-12-20 | 2022-04-12 | 安徽中科大国祯信息科技有限责任公司 | Automatic process equipment data conversion and instruction remote issuing method |
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Open date: 20100210 |