CN202058271U - CAN bus redundancy ship cabin monitor and alarm system - Google Patents
CAN bus redundancy ship cabin monitor and alarm system Download PDFInfo
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- CN202058271U CN202058271U CN2011200772812U CN201120077281U CN202058271U CN 202058271 U CN202058271 U CN 202058271U CN 2011200772812 U CN2011200772812 U CN 2011200772812U CN 201120077281 U CN201120077281 U CN 201120077281U CN 202058271 U CN202058271 U CN 202058271U
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Abstract
The utility model provides a novel CAN bus redundancy ship cabin monitor and alarm system, adopting a modularized structure design, and comprising a state display, a field analog quantity acquisition module, a field digital quantity acquisition module, a redundancy communication network, a network protocol converter and an alarm module. The state display is used for displaying the state of a field apparatus, the field analog quantity acquisition module and the field digital quantity acquisition module are used for acquiring the operation state of a ship cabin apparatus, the redundancy communication network is used for transmitting the state parameters of the apparatus to the state display, the network protocol converter is used for protocol conversion between different networks, and the alarm module realizes the alarm of apparatus abnormity. The modules of the system uses uniform interfaces, thus conveniently realizing expansion and interchange of the modules.
Description
Technical field
The present invention relates to a kind of Monitoring and Alarming System of Marine Engine Room, belong to the navigating equipment technical field.
Background technology
In recent years, the shipbuilding industry of China has obtained tremendous development.But along with the development of shipbuilding industry and improving constantly of engine room automation level, development is demanded in the navigating equipment manufacturing field of China urgently.In order to improve shipping navigation safety and economy, Attended mode still is that unattended boats and ships have all been installed the cabin supervisory system.The cabin supervisory system is made up of a plurality of subsystems, mainly comprises a series of subsystems such as Monitor and Alarm System for Ship Engine Room, automatic power management system, main frame monitor and alarm system, vehicle hold channel unit monitor and alarm system, the monitor and alarm system of can sizing mixing, main diesel generator set monitor and alarm system, combustion, lubricating oil seperator, oil burning boiler, bow lateral thruster, fin stabilizer.Monitor and Alarm System for Ship Engine Room is an important content of turbine robotization, this system can monitor the running status and the parameter thereof of various power-equipments in the cabin in real time, accurately, reliably, in case operational outfit breaks down, system can send sound, visual alarm automatically so that remind human pilot to note, and the printing alarm logging, it can also be according to the relevant state parameter of certain time interval printing device operation simultaneously.
The boats and ships monitor and alarm system that uses roughly can be divided into the three generations at present: first generation product is the main original monitoring system that adopts a large amount of analogue instruments; Second generation product mainly is with the monitor and alarm system of PLC as control and arithmetic core parts, by RS485 transmission data; Third generation product is based on the monitor and alarm system of PLC and fieldbus, has used some simple data check technology in the transmission data procedures.According to the complaint analysis of boats and ships staff feedback, the major defect that these Monitoring and Alarming System of Marine Engine Room products that use at present exist has:
1. adopt PLC as core control part, operational performance is poor;
The system architecture complexity, the cable amount is too much, cost is higher.
3. extension alarm inconvenience.
4. when communication line breaks down, powerless.
Along with the continuous development of microcontroller technology and field bus technique, the operation dominant frequency of a lot of controllers is up to 1GHz, and the arithmetic capability of controller has obtained improving greatly, and meanwhile, field bus technique has also obtained development rapidly.On the basis of original data transmission, increased the several data verification, commonly used CRC check in the industry for example, and in order to overcome the influence of transmission medium damage to data communication, redundant data communication technology begins one's study, just in communication process, use two pairs of separate communication medias, when wherein a communication line breaks down, can automatically use another communication line like this.
Summary of the invention
Problem in view of the above the utility model proposes a kind of Monitoring and Alarming System of Marine Engine Room of CAN bus redundancy.
The utility model adopts following technical scheme:
Status displays in the system adopts liquid crystal display to show that its key control unit is an industrial computer, main reception and the demonstration that realizes the engine room facilities status data.
In-site modeling amount acquisition module in the system and field digital amount acquisition module are based on the ARM design of Controller.These modules are gathered the equipment state in the watercraft engine room, will send to status displays or send to status displays through network protocol converter by the redundancy communication network after the data-switching that collect.
The redundancy communication network is based on the redundant CAN bus design.Redundancy Design is for reliability of data transmission is provided.110 nodes can be arranged at most on this bus,, in native system, designed network protocol converter and realized of the protocol conversion of RS485 bus to the CAN bus for solving the not enough problem of node number.In watercraft engine room the data that collect are transferred to network protocol converter by RS485, network protocol converter will receive data and be sent to status displays by the CAN bus then, thereby can increase the system node number effectively.
During the parameter overrun of alarm module in equipment operation, can send warning message, note, print alarm logging simultaneously to remind human pilot.This alarm module also is connected on the redundancy communication network, can realize easily report to the police extending, and alerting signal is offered long-range managerial personnel note or check.
These modules in the system adopt unified interface mode.When some modules break down, can replace this module easily, thereby shorten servicing time.Perhaps when the status data of more equipment need be gathered by system, can increase the quantity and the kind of module easily, thereby realize system extension easily.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples figure of the present invention is used to explain the present invention, does not constitute improper qualification of the present invention.
Fig. 1 is the structural representation of the Monitoring and Alarming System of Marine Engine Room of CAN bus redundancy according to an embodiment of the invention;
Fig. 2 is the block diagram of analogue collection module according to an embodiment of the invention;
Fig. 3 is the block diagram of digital data acquisition module according to an embodiment of the invention;
Fig. 4 is the block diagram of network protocol converter according to an embodiment of the invention;
Fig. 5 is the block diagram of alarm module according to an embodiment of the invention.
Specific implementation method
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
The present invention has adopted a kind of new design idea from system design.System adopts the design of modular thought, can mutual alternative between equal modules, can shorten the time of system maintenance so effectively.Each separation module can be worked independently, and the data of its measurement both can show in this locality, can be sent to main control unit by the communication network of engine room inside again, the monitor alarm of concentrating, thus make the handling property of system improve greatly.
Fig. 1 is the structural representation of the Monitoring and Alarming System of Marine Engine Room of CAN bus redundancy according to an embodiment of the invention.As shown in the figure, the Monitoring and Alarming System of Marine Engine Room of CAN bus redundancy comprises according to an embodiment of the invention: main control unit 105, be mainly used in the collection and the processing of status data, and finish the control co-ordination of total system simultaneously; Have the communication module 101 of CAN bus redundancy interface, be used for acquisition module and be connected in communication network; Analogue collection module 102 is used for gathering the analog signals of watercraft engine room; Digital data acquisition module 108 is used for gathering the digital quantity signal of watercraft engine room; Protocol converter 103 with redundant CAN bus and RS485 interface is used for the data transmission between RS485 and the CAN bus; Based on the communication module 109 of RS485 interface, be used for the data transmission of the on-the-spot RS485 signal of watercraft engine room; Alarm unit 106 is used for measured value and warning when unusual occurs; Display unit 107 is used for measured demonstration; And power module 104, for total system provides reliable and stable D.C. regulated power supply; Alarm logging unit 110 is used for the record of warning message, and its core is a printer.
Wherein, main control unit 105 is core ingredients of whole Monitor and Alarm System for Ship Engine Room.This unit is made up of an industrial computer, and the main next data of data collecting module collected of being responsible for receiving from the CAN bus bottom when showing these status data information that receive by display unit 107, are analyzed it.When finding that some data exceeds the allowed band of these data, this unit can send warning message to alarm unit 106, so that human pilot is fixed a breakdown timely, ensures shipping navigation safety.When needs increase extension alarm node or the demonstration of increase extension state, only need in main control unit, make relevant setting and can realize easily that extension shows or warning.
Wherein, analogue collection module 102 is connected on the redundancy CAN communication network by CAN communication interface module 101, perhaps is connected on the protocol converter 103 by RS485 communication interface module 109.The analogue collection module 102 main analog signalses of being responsible for gathering in the watercraft engine room convert thereof into digital signal and are transferred to main control unit 105 by communication network.The analog quantity type that can gather has: 0～10V voltage signal, common simulating signals such as 4～20mA current signal.
Wherein, digital data acquisition module 108 is connected on the redundancy CAN communication network by CAN communication interface module 101, perhaps is connected on the protocol converter 103 by RS485 communication interface module 109.Digital data acquisition module 108 mainly is responsible for gathering the digital quantity signals in the watercraft engine rooms, and the information that this digital quantity comprises is transferred to main control unit 105 by communication network.The digital information that can gather has: the convectional signals in the cabins such as switching value signal, pulse signal and frequency signal.
Wherein, communication module 103 can play the function of expansion CAN network.Because the CAN bus allows 110 nodes at most, in the large ship cabin, node is counted deficiency, so system adopts the expansion of expanding the method realization network of a plurality of Data Detection points by a CAN node.Its overlay network is the CAN bus, and its bottom-layer network is based on the RS485 bus.
Wherein, alarm unit 106 has the redundant CAN bus interface, is connected on the CAN communication network.Finding the data of data acquisition module sampling when main control unit has when unusual, and main control unit 105 sends warning message to alarm unit 106, and alarm unit 106 sends sound and light alarm after receiving information, reminds human pilot to note.
Wherein, alarm logging unit 110 can be after monitoring warning message, automatically writes down information such as current type of alarm, time of fire alarming, warning number, so that carry out that fault is got rid of or maritime affairs are used when handling in the later stage.The core of this alarm logging unit is a mini-printer, is operated on it by main control unit 105.
Fig. 2 is the block diagram of analogue collection module according to an embodiment of the invention.As shown in the figure, analogue collection module comprises according to an embodiment of the invention: voltage signal acquisition interface 201 is used for voltage signal is nursed one's health the voltage signal that becomes module to gather sensor signal conditioning; Current signal acquisition interface 203 is used for the access of 4～20mA current signal; I/V change-over circuit 204 is used for converting the current signal of 4～20mA to analog voltage signal; Multiway analog switch 202 is used to control the passage of current sampling; Filtering circuit 205 is used for simulating signal is carried out filtering and conditioning; Simulating signal isolation module 206 is used for the electrical isolation of simulating signal, improves the reliability of system; A/D converter 207 is used for converting analog signals to can transmit digital quantity signal on bus; Processor 208 is used to finish the data transmit-receive on data acquisition, data processing and the bus; Communication interface circuit 209 is used for and will sends data to communication network and receive data from communication network; Power module 210 is used to provide the power supply of system's operate as normal.
Wherein, power module 210 need provide three groups of power supplys, is respectively applied for the power supply of analogue collection module, the isolation aanalogvoltage of analog quantity front end, the isolation digital power of communication interface end.Use this power circuit can suppress power supply effectively and disturb the harmful effect that brings to system stability, the possibility of avoiding system frequently to break down.
Wherein, communication interface circuit 209 can be finished two-way data communication, and uses redundant each other communication interface circuit.When this analogue collection module is used for the RS485 network of bottom, use redundant RS485 interface circuit; When this analogue collection module is directly connected to the CAN bus, can use redundant CAN interface circuit.
Fig. 3 is the block diagram of digital data acquisition module according to an embodiment of the invention.As shown in the figure, the digital data acquisition module comprises according to an embodiment of the invention: switch acquisition interface circuit 301 is used to gather the switching value signal; Pulsed quantity or frequency signal interface circuit 302 are used for acquisition pulse amount signal or frequency signal; Photoelectric isolation module 303 is used to realize electrical isolation, improves the reliability of system; Processor unit 304 is used for the collection and the processing of data, and the data that will handle send on the communication network or from communication network by communication interface 305 and receive data; Power module 306 and insulating power supply 307 are for system provides working power.
Fig. 4 is the block diagram of communication network protocol converter according to an embodiment of the invention.As shown in the figure, the communication network protocol converter comprises according to an embodiment of the invention: data processor 405 is used for the processing of data and the selection of communication network medium; RS485 network interface 401 and 403 is used for carrying out communication with the RS485 network of lower floor; Photoelectric isolation module 402,404,406,407 is used for the electrical isolation of communicating circuit, avoids the interference on the communication line to scurry into system, influences the operate as normal of system; CAN communication interface circuit 408 and 409 is used for carrying out communication with the CAN network on upper strata; System power supply 410 is used to system that reliable power supply is provided; Insulating power supply 411 and 412 is used to communicating circuit that reliable insulating power supply is provided.
Wherein, data processor 405 is cores of communication network protocol converter.It receives data from the RS485 bus, sends on the CAN bus by CAN bus interface 408 after treatment.Perhaps the data forwarding that will receive from the CAN bus is on corresponding RS485 bus, thereby realizes two-way data forwarding ability to communicate.In addition, when data processor 405 is judged a certain road communication line and broken down, just automatically switch to its standby communication line.Thereby improved the reliability of communication to greatest extent.
Fig. 5 is the block diagram of alarm unit according to an embodiment of the invention.As shown in the figure, alarm unit comprises according to an embodiment of the invention: standby each other CAN network communication interface 501 and 502 is used for receiving alert data from the CAN network; Control module 507 is used for receiving data and controlling sound and light alarm from bus; Function button 508 is used for function setting and warning message is made response; Voice guard 505 provides warning message with the mode of sound, reminds human pilot to note; Luminous alarm 506 reminds the staff to note warning message by the luminophor of flicker.
Claims (1)
1. the Monitoring and Alarming System of Marine Engine Room of a novel CAN bus redundancy, this system adopts the modular construction design, comprise: status displays, in-site modeling amount acquisition module, field digital amount acquisition module, the redundancy communication network, network protocol converter and alarm module, it is characterized in that: in-site modeling amount acquisition module and field digital amount acquisition module are gathered the status data of watercraft cabinet equipment respectively, and with the data that collect by the redundancy communication Network Transmission to network protocol converter, network protocol converter can realize the data-switching between different network protocol, and with data transmission to status displays, occur when unusual in data, alarm module can be realized reporting to the police, each module of system adopts unified interface, can realize the expansion and the exchange of each module easily.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200772812U CN202058271U (en) | 2011-03-23 | 2011-03-23 | CAN bus redundancy ship cabin monitor and alarm system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200772812U CN202058271U (en) | 2011-03-23 | 2011-03-23 | CAN bus redundancy ship cabin monitor and alarm system |
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| CN202058271U true CN202058271U (en) | 2011-11-30 |
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| CN2011200772812U Expired - Fee Related CN202058271U (en) | 2011-03-23 | 2011-03-23 | CAN bus redundancy ship cabin monitor and alarm system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445347A (en) * | 2018-11-16 | 2019-03-08 | 美钻深海能源科技研发（上海）有限公司 | A kind of digital display unit and its display methods of collection in worksite signal |
| CN110191039A (en) * | 2019-06-25 | 2019-08-30 | 长沙瀚鹏电子技术有限公司 | A kind of digital signal acquiring device, method and system |
| CN115202302A (en) * | 2022-07-14 | 2022-10-18 | 核工业理化工程研究院 | Distributed monitoring system based on field bus |
| CN115512508A (en) * | 2022-10-20 | 2022-12-23 | 九江中船消防设备有限公司 | Many detection unit compatible type marine fire alarm system |
-
2011
- 2011-03-23 CN CN2011200772812U patent/CN202058271U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445347A (en) * | 2018-11-16 | 2019-03-08 | 美钻深海能源科技研发（上海）有限公司 | A kind of digital display unit and its display methods of collection in worksite signal |
| CN110191039A (en) * | 2019-06-25 | 2019-08-30 | 长沙瀚鹏电子技术有限公司 | A kind of digital signal acquiring device, method and system |
| CN115202302A (en) * | 2022-07-14 | 2022-10-18 | 核工业理化工程研究院 | Distributed monitoring system based on field bus |
| CN115512508A (en) * | 2022-10-20 | 2022-12-23 | 九江中船消防设备有限公司 | Many detection unit compatible type marine fire alarm system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20120323 |