CN107168264A - The serial ports shared system and method for environmental monitoring - Google Patents
The serial ports shared system and method for environmental monitoring Download PDFInfo
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- CN107168264A CN107168264A CN201710478043.4A CN201710478043A CN107168264A CN 107168264 A CN107168264 A CN 107168264A CN 201710478043 A CN201710478043 A CN 201710478043A CN 107168264 A CN107168264 A CN 107168264A
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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
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
- G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by the network communication
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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
- G05B2219/30—Nc systems
- G05B2219/31—From computer integrated manufacturing till monitoring
- G05B2219/31088—Network communication between supervisor and cell, machine group
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention provides a kind of serial ports shared system of environmental monitoring, the system includes：Serial ports, at least one environment monitor, multiple Industrial Control Computers and processing module.Processing module is divided to the serial ports time shared by each environment monitor and corresponding Industrial Control Computer session, obtain multiple time slots, and in a time slot, one Industrial Control Computer transmits network data to corresponding environment monitor by the serial ports, the environment monitor is received and responds the network data, and the network data is back into Industrial Control Computer.In addition, present invention also offers a kind of serial ports sharing method of environmental monitoring, the present invention realizes multiple instruments gathered data and manipulation simultaneously, while also supporting many Industrial Control Computers to access the serial communication of at least one environment monitor.
Description
Technical field
The present invention relates to the technical field of serial communication of environmental monitoring, more particularly to a kind of shared system of serial ports of environmental monitoring
System and method.
Background technology
In environmental monitoring, at present because all kinds of environment supervision instrument manufacturers are each provided with the serial communication of oneself
Control software, but communication standard is each different, procedure operation design is complicated, and parameter setting is also different.
The primary communications mode of current environment monitoring instrument is serial communication (RS232), and only one of which communicates serial ports
Interface provides data communication service.Because serial ports design is monopolistic, such structure can only meet a data acquisition and set
It is standby to be communicated with monitoring instrument.
The content of the invention
(1) technical problem to be solved
It is an object of the invention to provide the serial ports shared system and method for a kind of environmental monitoring, with solve it is above-mentioned at least
One technical problem.
(2) technical scheme
The invention provides a kind of serial ports shared system of environmental monitoring, including：
Serial ports, including first end, the first end include at least one first interface；And second end, second end
Including multiple second interfaces；
At least one environment monitor, for being electrically connected with the first interface；
Multiple Industrial Control Computers, for being electrically connected with described second interface, and each environment monitor and multiple works
Industry control machine correspondence, is conversated by the serial ports；
Processing module, is electrically connected with the serial ports, for each Industrial Control Computer and corresponding environment monitor session
The shared serial ports time is divided, and obtains multiple time slot t, and in a time slot, an Industrial Control Computer passes through the serial ports
Network data is transmitted to corresponding environment monitor, the environment monitor receives and responds the network data, and by the network
Data are back to the Industrial Control Computer.
Alternatively, the processing module is additionally operable to set the priority level of Industrial Control Computer, to realize different priority
Each Industrial Control Computer of grade conversates in different time slots with corresponding environment monitor respectively.
Alternatively, t the time required to the time slot t=Serial Port Transmissions data1+ serial ports responds stand-by period t2During+network transmission
Between t3+ data processing time t4+ serial ports returned data time t5, wherein t2≤50ms。
Alternatively, the processing module is additionally operable to：If serial ports is in t2Response Industrial Control Computer in period, then by the network
Data are put into buffering area, and in t3With t4In period, the network data is back to corresponding environment monitor, the environment
Monitor is received and responds the network data, and the network data is back into the Industrial Control Computer, so as to terminate this time meeting
Talk about and discharge serial ports, carry out session next time；If serial ports is not in t2Industrial Control Computer is not responded in period, then directly terminates this
Secondary session, and serial ports is discharged, carry out session next time.
Alternatively, the system also has communication log writing function：The communication state of each serial ports can be checked, during command interval
Between, whether serial ports idle, and Communications failure record.
Based on same inventive concept, present invention also offers a kind of serial ports sharing method of environmental monitoring, methods described should
The serial ports shared system monitored for aforesaid environmental, including step：
Processing module is divided to the serial ports time shared by each Industrial Control Computer and corresponding environment monitor session,
Obtain multiple time slot t；
In each time slot, an Industrial Control Computer transmits network data to corresponding environment monitor, environment by serial ports
Monitor is received and responds the network data, and the network data is back into the Industrial Control Computer.
Alternatively, t the time required to the time slot t=Serial Port Transmissions data1+ serial ports responds stand-by period t2During+network transmission
Between t3+ data processing time t4+ serial ports returned data time t5, wherein t2≤50ms。
Alternatively, if serial ports is in t2Response Industrial Control Computer in period, then be put into buffering area by the network data, and
t3With t4In period, the network data is back to corresponding environment monitor, the environment monitor receives and responds the net
Network data, and the network data is back to the Industrial Control Computer, so as to terminate this session and discharge serial ports, carry out next
Secondary session；If serial ports is not in t2Industrial Control Computer is not responded in period, then directly terminates this session, and discharges serial ports, is entered
Row session next time.
Alternatively, in one time slot, when an Industrial Control Computer conversates, the Industrial Control Computer not conversated
Network data is sent to serial ports, the network data enters enqueue, and next slot transmission is waited successively.
Alternatively, time slot session queue maximum delay=mono- time slot of the wait of the Industrial Control Computer not conversated
The number of queues that serial ports time * accesses this serial ports is taken, wherein, the time slot session queue maximum delay≤1s.
(3) beneficial effect
The present invention has advantages below compared to prior art：
1st, the serial ports shared system for the environmental monitoring that the present invention is provided, communication optimization and tune are carried out for environment supervision instrument
Examination, and complete environment supervision instrument communication protocol stack storehouse is provided, realize the support to proprietary communications protocol.Can be to the number of communication
According to progress intelligent selection with judging, it is ensured that data communication is reliable and stable, meets various industrialized production environmental work needs.
2nd, the serial ports sharing method for the environmental monitoring that the present invention is provided, using time-division mechanics of communication, carries out the division of time slot,
The separated transmission between data is ensure that, meeting multiple instruments, gathered data and manipulation support many Industrial Control Computers at least one simultaneously
The serial communication of platform environment monitor is accessed, and easily realizes multiple instruments data acquisition and operational control simultaneously.
3rd, the present invention provides management software access control, can complete communications parameter by LAN (LAN) mouth and set, side
Convenient to operate.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of the serial ports shared system of the environmental monitoring of the embodiment of the present invention；
Fig. 2 is the structural representation of the serial ports shared system of the environmental monitoring of a specific embodiment of the embodiment of the present invention；
Fig. 3 is the schematic diagram of the serial ports holding time of the access queue of the embodiment of the present invention；
Fig. 4 is the time slot schematic diagram of the embodiment of the present invention；
Fig. 5 is the step schematic diagram of the serial ports sharing method of the environmental monitoring of the embodiment of the present invention.
Embodiment
In the prior art, the primary communications mode of current environment monitoring instrument is serial communication (RS232), and only
One communication serial interface provides data communication service, and due to the exclusivity that serial ports is designed, a serial ports can only typically realize number
According to the transmission between a host computer and a slave computer.But in production application scene, generally require many and adopt
Collection equipment realizes data exchange with monitoring instrument, i.e., multiple host computers need to realize with one even more than under by a serial ports
The situation of data communication between the machine of position, therefore, the invention provides the serial ports shared system and method for a kind of environmental monitoring, from
And complete to realize one-to-many or even multi-to-multi serial communication needs by a serial ports.Its design meets environment supervision instrument
Data acquisition demand, for solving many industrial control data collecting devices to the shared communication at least one monitoring instrument
Practical problem, can be widely applied to environment automatic monitoring field.
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.
Fig. 1 is the general structure schematic diagram of the serial ports shared system of the environmental monitoring of the embodiment of the present invention, as shown in figure 1,
The one side of the embodiment of the present invention provides a kind of serial ports shared system of environmental monitoring, including：
Serial ports, including first end, the first end include at least one first interface；And second end, second end
Including multiple second interfaces；
At least one environment monitor, for being electrically connected with the first interface；
Multiple Industrial Control Computers, for being electrically connected with described second interface, and each environment monitor and multiple works
Industry control machine correspondence, is conversated by the serial ports；
Processing module, is electrically connected with the serial ports, for each Industrial Control Computer and corresponding environment monitor session
The shared serial ports time is divided, and obtains multiple time slot t, and in a time slot, an Industrial Control Computer passes through the serial ports
Network data is transmitted to corresponding environment monitor, the environment monitor receives and responds the network data, and by the network
Data are back to the Industrial Control Computer.In general, the processing module can be by software program or other programmable datas
Device etc. is managed to realize.In addition, can also have multiple serial ports in the serial ports shared system of an environmental monitoring with controlling its processing
Module, so as to realize the monitoring communication between more equipment.
In an embodiment of the present invention, two environment monitors are selected, and are distinguished with two environment monitors
Corresponding four Industrial Control Computers, Fig. 2 is the serial ports shared system of the environmental monitoring of a specific embodiment of the embodiment of the present invention
Structural representation, as shown in Fig. 2 the serial ports shared system, including a serial ports, the first end of the serial ports includes 2 first
There are 4 second interfaces (COM11, COM12, COM21 and COM22) at interface (COM1 and COM2), its second end.COM1, COM2 points
Other JA(junction ambient) monitor 1 and Industrial Control Computer 2, COM11 and COM12 are connected progress communication session with environment monitor 1 respectively,
COM21 and COM22 are connected progress communication session with Industrial Control Computer 2 respectively.Wherein, each connected mode of equipment is used
RS232 serial ports cables, the baud rate of serial communication 9600,8, no parity check.
In addition, processing module is also connected with the serial ports, for the Industrial Control Computer 11 corresponding with its of environment monitor 1
It is shared during with Industrial Control Computer 12 and the Industrial Control Computer 21 corresponding with its of Industrial Control Computer 2 and 22 session of Industrial Control Computer
The serial ports time is divided, and obtains 4 time slot t, and in one time slot, an Industrial Control Computer is transmitted by the serial ports
Network data is to corresponding environment monitor, and the environment monitor receives and responds the network data, and by the network data
It is back to Industrial Control Computer.In addition, the system can also have communication log writing function：The communication shape of each serial ports can be checked
Whether state, command interval time, serial ports is idle, record of Communications failure etc..
The processing module can be also used for setting the priority level of Industrial Control Computer, and processing module can set work to join
Number, such as：TimeOut, the model of environment monitor communicates end identifier etc. and can be for example arranged on and leads to environment monitor
The priority of Industrial Control Computer 11 in letter is higher than Industrial Control Computer 12, then may insure the priority traffic of Industrial Control Computer 11.When
When the reception instruction simultaneously of Industrial Control Computer 11 and Industrial Control Computer 12 is ready for sending data startup session, Industrial Control Computer 11 is excellent
First；The instruction buffer obstruction of Industrial Control Computer 12, sends when waiting serial ports idle.When the response data end mark of Industrial Control Computer 11
When (such as 0D), rear 500ms do not have to can be considered instrument idle during other data；When instrument idle, idle serial ports can forward work
The data of industry control machine 22.
The present invention utilizes time-division mechanics of communication, and one query formula serial ports is accessed and is defined as a session, a session is accounted for
The serial ports time, it is defined as a time slot.By for distinct device reasonable distribution time slot, you can realize that the serial ports of many equipment is visited
Ask.The present disclosure additionally applies for the access of query formulation serial ports, it is to start a time slot session that host computer, which sends network data, in this time slot
Before session is completed, it is not possible to interrupted by other equipment, it is ensured that the integrality of serial data.In addition, a time slot session is completed
After serial ports hair receipts process, data being obtained immediately and returning to corresponding device, if not obtaining data, waiting facilities starts
Next time slot session.With or without data are obtained, after the completion of time slot session, all serial ports can be conceded for other equipment.To ensure
All devices can be fair obtain data, even if serial ports is taken by a time slot session, other equipment can also send net
Network data give shared serial server, and now data will enter enqueue, after the completion of the time slot session worked, you can use
This data is that other equipment starts new session.Fig. 3 is the schematic diagram of the serial ports holding time of the access queue of the embodiment of the present invention,
As shown in figure 3,4 Industrial Control Computers access a serial ports simultaneously, 4 Industrial Control Computers of time slot session A-D correspondences respectively with ring
Data transfer between the session of border monitor, 4 Industrial Control Computers is completely isolated.
In one time slot, when an Industrial Control Computer conversates, other Industrial Control Computers send network data extremely
Serial ports, the network data enters enqueue, and next slot transmission is waited successively.And the time slot session team of the wait of Industrial Control Computer
Row maximum delay=mono- Time Slot Occupancy serial ports time * accesses the number of queues of this serial ports, wherein, the time slot session queue is maximum
Delay≤1s.If the maximum delay ＞ 1s of time slot session queue, the stand-by period time-out in queue of the Industrial Control Computer, now
The Industrial Control Computer needs to reenter queue wait again.
At present because all kinds of environment supervision instrument manufacturers are each provided with the serial communication control software of oneself, but it is logical
News standard is each different, and procedure operation design is complicated, and parameter setting is also different.The serial ports for the environmental monitoring that the present invention is provided
Shared system can be by the instrument communication agreement of special main flow at present, the bottom communication association of the current various monitoring devices of integration packaging
View, unified planning device data acquisition, control, communication, the communication interface of processing, unified abstract monitoring device management control mould
Type, is that the data of upper-layer service system are transferred and communicate core frame there is provided reliable and stable core data.The Industrial Control Computer can
To use ARM7TDMI embeded processors and (SuSE) Linux OS, actual motion environment Linux monitor 2 is used
The management systems of CentOS 6.5.
In environment automatic monitoring system is applied and is, the serial ports shared system of the environmental monitoring that the present invention is provided there is provided
Management software access control, completes communications parameters by LAN mouthfuls and sets, the enviromental monitoring equipment of encapsulated completion is as follows：
Thermo 42i (NO/NO2/Nox monitors), Thermo 43i (SO2 monitors), Thermo 48i (CO monitors),
Thermo 49i (O3 monitors), T-API M100E (SO2 monitors), T-API M200E (NO/NO2/Nox monitors), T-
API M300E (CO monitors), T-API M400E (O3 monitors), Thermo 1400ab (PM10 monitors) and Thermo
1405F (PM2.5 monitors).There is the ring that other enviromental monitoring equipments can be provided based on the present invention in other embodiments
The serial ports shared system of border monitoring is built, and will not be repeated here.
Fig. 4 is the time slot schematic diagram of the embodiment of the present invention, as shown in figure 4, the time slot t=Serial Port Transmission data are taken
Between t1+ serial ports wait-for-response time t2+ network latency t3+ equipment processing data time t4+ serial ports returns data into environment prison
Survey instrument time t5, in general, t the time required to Serial Port Transmission data1Environment monitor time t is returned data into serial ports5Phase
Deng.In addition, the t2≤50ms.If serial ports is in t2Response Industrial Control Computer, then be put into buffering by the network data in period
Area, and in t3With t4In period, the network data is returned to the environment monitor of session therewith, the environment monitor connects
Receive and respond the network data, and the network data is back to Industrial Control Computer, so as to terminate this session and discharge string
Mouthful, carry out session next time；If serial ports is not in t2(i.e. serial ports wait-for-response is more than 50ms) does not respond Industry Control in period
Machine, no longer transmits the network data, then directly terminates this session, and discharges serial ports, carries out session next time.
The another aspect of the embodiment of the present invention additionally provides a kind of serial ports sharing method of environmental monitoring, methods described application
In above-mentioned serial ports shared system, Fig. 5 is the step schematic diagram of the serial ports sharing method of the environmental monitoring of the embodiment of the present invention, such as
Shown in Fig. 5, the method comprising the steps of：
S1, processing module are drawn to the serial ports time shared by each Industrial Control Computer and corresponding environment monitor session
Point, obtain multiple time slot t；
Step S1 utilizes time-division mechanics of communication, and one query formula serial ports is accessed and is defined as a session, a session is accounted for
The serial ports time, it is defined as a time slot.By for distinct device reasonable distribution time slot, you can realize that the serial ports of many equipment is visited
Ask.Wherein, t the time required to time slot t=Serial Port Transmissions data1+ serial ports wait-for-response time t2+ network latency t3+ equipment
Processing data time t4+ serial ports returns data into environment monitor time t5, and t2≤ 50ms, if serial ports wait-for-response exceedes
50ms, then directly terminate this session, and discharges serial ports, carries out session next time.
S2, in each time slot a, Industrial Control Computer passes through serial ports and transmits network data to corresponding environment monitor, ring
Border monitor is received and responds the network data, and the network data is back into the Industrial Control Computer.
It is also possible to ensure that what all devices can be fair obtains data.Even if serial ports is by a time slot
Session takes, and other equipment can also send network data to shared serial server, and now data will enter enqueue, when just
After the completion of the time slot session of work, you can with this data be other equipment start new session.The serial ports of the environmental monitoring is shared
Method uses time-division mechanics of communication, carries out the division of time slot, it is ensured that the separated transmission between data, meets multiple instruments and gather simultaneously
Data and manipulation support many Industrial Control Computers to access the serial communication of at least one environment monitor, realize multiple instruments same
When data acquisition and operational control.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail bright, it should be understood that the foregoing is only the present invention specific embodiment, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc. should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of serial ports shared system of environmental monitoring, it is characterised in that including：
Serial ports, including first end, the first end include at least one first interface；And second end, second end includes
Multiple second interfaces；
At least one environment monitor, for being electrically connected with the first interface；
Multiple Industrial Control Computers, for being electrically connected with described second interface, and each environment monitor is controlled with multiple industry
Machine correspondence processed, is conversated by the serial ports；
Processing module, is electrically connected with the serial ports, for shared by each Industrial Control Computer and corresponding environment monitor session
The serial ports time is divided, and obtains multiple time slot t, and in a time slot, an Industrial Control Computer is transmitted by the serial ports
Network data is to corresponding environment monitor, and the environment monitor receives and responds the network data, and by the network data
It is back to the Industrial Control Computer.
2. system according to claim 1, it is characterised in that the processing module is additionally operable to set the excellent of Industrial Control Computer
Grade is first weighed, to realize each Industrial Control Computer of different priority levels respectively in different time slots and corresponding environment monitor
Conversate.
3. system according to claim 1, it is characterised in that t the time required to the time slot t=Serial Port Transmissions data1+ string
Mouth response stand-by period t2+ network latency t3+ data processing time t4+ serial ports returned data time t5, wherein t2≤50ms。
4. system according to claim 3, it is characterised in that the processing module is additionally operable to：If serial ports is in t2In period
Industrial Control Computer is responded, then the network data is put into buffering area, and in t3With t4In period, the network data is returned
To corresponding environment monitor, the environment monitor is received and responds the network data, and the network data is back into this
Industrial Control Computer, so as to terminate this session and discharge serial ports, carries out session next time；If serial ports is not in t2Do not rung in period
Industrial Control Computer is answered, then directly terminates this session, and discharges serial ports, session next time is carried out.
5. system according to claim 1, it is characterised in that the system also has communication log writing function：It can check
Whether the communication state of each serial ports, command interval time, serial ports idle, and Communications failure record.
6. the serial ports sharing method of a kind of environmental monitoring, it is characterised in that methods described is applied to as claim 1 to 5 is any
The serial ports shared system of described environmental monitoring, including step：
Processing module is divided to the serial ports time shared by each Industrial Control Computer and corresponding environment monitor session, is obtained
Multiple time slot t；
In each time slot, an Industrial Control Computer transmits network data to corresponding environment monitor, environmental monitoring by serial ports
Instrument is received and responds the network data, and the network data is back into the Industrial Control Computer.
7. method according to claim 6, it is characterised in that t the time required to the time slot t=Serial Port Transmissions data1+ string
Mouth response stand-by period t2+ network latency t3+ data processing time t4+ serial ports returned data time t5, wherein t2≤50ms。
8. method according to claim 7, it is characterised in that if serial ports is in t2Response Industrial Control Computer in period, then will
The network data is put into buffering area, and in t3With t4In period, the network data is back to corresponding environment monitor,
The environment monitor is received and responds the network data, and the network data is back into the Industrial Control Computer, so as to terminate
This time session simultaneously discharges serial ports, carries out session next time；If serial ports is not in t2Industrial Control Computer is not responded in period, then directly
Terminate this session, and discharge serial ports, carry out session next time.
9. method according to claim 6, it is characterised in that in one time slot a, Industrial Control Computer enters guild
During words, the Industrial Control Computer not conversated sends network data to serial ports, and the network data enters enqueue, waits next successively
Individual slot transmission.
10. method according to claim 9, it is characterised in that the wait of the Industrial Control Computer not conversated
Time slot session queue maximum delay=mono- Time Slot Occupancy serial ports time * accesses the number of queues of this serial ports, wherein, the time slot meeting
Talk about queue maximum delay≤1s.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111585697A (en) * | 2020-04-03 | 2020-08-25 | 河南翔宇医疗设备股份有限公司 | Communication method, device and multi-module communication system |
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| CN104853451A (en) * | 2015-03-13 | 2015-08-19 | 扬州工业职业技术学院 | Aquarium fish culture environment monitoring system based on wireless sensor network |
| US10009979B2 (en) * | 2015-05-01 | 2018-06-26 | Hubbell Incorporated | Devices, systems, and methods for controlling electrical loads |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111585697A (en) * | 2020-04-03 | 2020-08-25 | 河南翔宇医疗设备股份有限公司 | Communication method, device and multi-module communication system |
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