CN101854213A - Plastic optical fiber bus embedded type sensor device - Google Patents
Plastic optical fiber bus embedded type sensor device Download PDFInfo
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- CN101854213A CN101854213A CN201010133644A CN201010133644A CN101854213A CN 101854213 A CN101854213 A CN 101854213A CN 201010133644 A CN201010133644 A CN 201010133644A CN 201010133644 A CN201010133644 A CN 201010133644A CN 101854213 A CN101854213 A CN 101854213A
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Abstract
The invention discloses a plastic optical fiber bus embedded type sensor device, which is characterized in that: a singlechip C8051 performs information acquisition on sensor signals through an ADC; the sensor signals are transmitted to a large diameter plastic optical fiber in the mode of different wavelengths through an optical transmitting system; the large diameter plastic optical fiber receives various sensor signals, and a PZT controls an optical fiber phase shifting grating to perform wavelength filtering on the sensor signals so as to realize information separation of each sensor; and an optical network measurement and control terminal performs physical addresses allocation of the sensors on each sensor information through an IP address, adds a time tag, and then transmits the sensor information to an optical network by a photoelectric transformation technique. The device can overcome the defects of unicity and immovability of coupling of the current terminal information, and enhances the exchange capacity of the network information, so that the bus can measure and control through a plurality of media information to form a movable network measurement and control bus.
Description
Technical field
What the present invention relates to is a kind of automation equipment, the industrial detection sensor device in specifically a kind of measurement and control area.
Background technology
The message transmission of China's industry control sensor and control bus almost all adopts electronic type network detection and control terminal, complexity, the big poor work stability of phase mutual interference are used in existence, information format conversion is frequent and information detects shortcomings such as kind is few, and occur untrue, the untimely phenomenon of sensor information sometimes, seriously restricting of the effective reception of industrial network measurement and control bus multiple sensors information.For example according to China's coal-mine Safe Production Supervision department to the coal mine gas from explosion causal investigation, gas explosion be under many circumstances because gas pour out suddenly.At present, no matter be firedamp sensor or gas monitoring system, the gas density that is provided all is the current safety status data, can not predict the gas density in future, causes when gas density transfinites, and has little time to take the effective precautionary measures.The gas monitoring system that must opening can predict.The technology of new generation of safe condition and firedamp sensor is an optical transmission safe condition comprehensive detection technology.Detecting gas density with firedamp sensor is example, when the gas density of mine transfinites or exists when transfiniting hidden danger, in time reminds the relevant personnel to take measures to protect personnel, production equipment and surrounding environment under the mine.At present, realize that the technology that methane gas detects has a lot, more common has: electrochemical techniques, electronic technology, optical fiber sensing technology and spectrographic detection technology.
Summary of the invention
The object of the invention provides by coupler optical coupling of plastic fiber information and information separated technology, cooperates a kind of plastic optical fiber bus embedded type sensor device of fiber optic network detection and control terminal.
The object of the present invention is achieved like this:
Single-chip microcomputer C8051 carries out the ADC information gathering for sensor signal, sensor signal is carried out the different wave length mode by light emission system and is transmitted to large-bore plastics optical fiber, large-bore plastics optical fiber carries out the reception of various sensor signals then, and carry out wavelength filtering by PZT control optical fiber phase-shifted grating, realize each sensor information separation, the fiber optic network detection and control terminal is by each sensor information of photoelectric conversion technique, carry out the transducer physical address assignments by the IP address, and add time tag, be sent in the fiber optic network.
Beneficial effect of the present invention can be widened the total line use ratio of fiber optic network formula for adopting the plastic optical fiber bus optical information coupler, make bus be undertaken the issue formula to a plurality of heat transfer agents and receive and transmitted, can compress the measuring terminals of fiber optic network by plastic optical fibre coupler.Can utilize standard network software and virtual instrument software exploitation multisensor syste, reduce software development cost; The plastic optical fiber bus optical information coupler makes the Optical Network Terminal volume can move application.Lower the hardware and software cost of current fiber buss information gathering.Solve the coupling speed of current fiber optic network measuring terminals, line and the difficulty that moves solve metrical information and connect difficult problem.For being connected with wireless bus, the expansion fiber buss lays foundation.Make various heat transfer agents by IP address access industrial internet network easily, and can position for the physical location of a plurality of transducers.
Description of drawings
Fig. 1 is a plastic fiber information coupler terminal structure.
Fig. 2 is plastic fiber information coupler terminal knot and fiber optic Ethernet connection layout.
Fig. 3 is plastic fiber information coupler and network linker.
Fig. 4 is plastic optical fiber bus optical information coupler structure and course of work block diagram.
Fig. 5 adopts the plastic optical fiber bus optical information coupler to constitute the landslide monitoring system.
Fig. 6 adopts plastic fiber information coupler to constitute landslide monitoring system block diagram.
Fig. 7 is a landslide monitoring plastics plastic fiber information coupling sensing terminal structured flowchart.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
1) plastic fiber information coupler is connected with the industrial optical fiber Ethernet
1. plastic fiber information coupler is connected employing wireless network trunking scheme with the industrial optical fiber Ethernet,
2. plastic fiber information coupler utilizes infrared and radio laser and the wireless compatibility of 2.4G, adopts unified Ethernet platform.
3. plastic fiber information coupler its be distributed with bus-type and star dual mode.
4. being connected of plastic fiber information coupler and internet adopted wireless router and two kinds of traditional approachs of wireless exchange board.
2) plastic fiber information coupler terminal structure is seen plastic fiber information coupler terminal knot shown in Figure 1 and fiber optic Ethernet connection layout as shown in Figure 2.
The plastic optical fiber bus embedded type sensor terminal computer adopts C8051 to constitute,
1. plastic fiber information coupler terminal computer adopts C8051 to constitute, have ADC and `DAC and infrared ray photoelectricity transceiver, wireless network transceiver, transceiver is connected with network with switch by network photoelectricity router, carries out the remote information transmission by network.
2. plastic fiber information coupler information input, do the transducer input by ADC as sensor information collection and quantification, by network terminal analog to digital converter (ADC), physical quantity is measured, result data carries out long-range transmission by network.
3. plastic fiber information coupler information output is finished by DAC, and the control command that receives main computer by the network terminal is carried out Long-distance Control.
3) software platform that is connected with fiber optic network of plastic fiber information coupler
1. the network software platform constitutes fiber optic Ethernet measurement and control bus platform by LabWIEW+Windows+Quaaga route bag.LabWIEW and Windows remote control function belong to conventional software, the Quaaga software system function is realized the master-plan demand to gas monitor fiber optic network central office terminal Control Software System, promptly need the function of its realization mainly to comprise following content: (a) to make up a stable operating system platform based on Windows, provide good platform to support for embedding driving and webmaster program running, and sufficient configuration file stores space is provided.(b) stablize, drive reliably BCM5630X core exchange chip, realize the IEEE802.3z agreement, set up normal data transmission channel.(c) according to the functional requirement of product specification book, realize corresponding protocols and function.Comprise 802.1p, 802.1x, 802.1q, 802.1d, 802.3x, IGMP, IGMP-snooping, ACL or the like.(d), provide the api interface function, the feasible parameter assignment that can realize underlying protocol and function by network management interface according to the demand of upper strata webmaster.Function below supporting: (a) support multiple network management function: CLI, WEB, SNMP, EMS etc.; (b) process (task) scheduling feature is supported distinctive internal schedule mechanism, rather than is dispatched by Dos fully; (c) IPC communication modes: can support the mode of distributed IP C communication, can support seamless communication between many plates like this; (d) memory management mechanism; Can monitor Memory Allocation and release conditions; (e) timer management mechanism; Can define various timers: periodicity timer, relative timer, absolute timer etc.; (f) debug function; The state that debug switch comes supervisory control system running can be set; (g) abnormality processing function: pounce on and obtain unusual (endless loop, internal memory unauthorized access); (h) but system's maintenance function: internal memory monitoring function, debugging print function, journal function, upgrade function; Setting up a reliable and stable software platform needs the accumulation of time and experience, and fully from the beginning the software platform of exploitation oneself needs a large amount of time.Might as well on the framework of a maturation, make an amendment and transplant, avoid oneself starting afresh and set up a framework, in software development process, just can pay close attention to the business function of native system like this and realize, develop product rapidly with self-character.In the exploitation service product, if think that existing framework may be not mature enough or may set up own platform framework fully later on, in the time of can calling the interface function that this framework provides in code, the docking port function is done one deck encapsulation.As at the code that calls the IPC communication that particular platform provides, can be encapsulated as ipc_sendmsg.
2. plastic fiber information coupler terminal network connects software employing Ethernet common software.Possesses (a) device upgrade function (b) portability simultaneously, all codes of framework code adopt standard C to realize, code can be directly in PC/linux and the cofree transplanting of ppc/linux, but because individual modules has adopted some system calls of linux, can not be transplanted to freely other os as: on windows and the VxWorks, but such code seldom, and change if desired can be rewritten as complete transplantable code with this part code by the consideration manpower.
Plastic fiber information coupler software can be divided into (a) ADMINISTRATION SUBSYSTEM, comprises three submodules of SNMP agent, WebServer and Telnet.SNMP agent is the agent process of snmp protocol, and the communication interface with EMS is provided, and realizes access control to MIB (management information bank) in other modules by SMUX (the multiplexed management of SNMP) agreement.Web Server is a HTTP access server module, and by the administration configuration page of operation, response is based on the access request of http protocol, and realizes visit to MIB by the snmp agreement, thereby finishes the system configuration and the maintenance of WEB mode.Telnet is a TelnetClient login service module, uses the telnet client of standard just can sign in on the main control unit of system, and the various command by CLI provides realizes operations such as relevant test, upgrading.As figure shows, the management application module is as follows: the agent process of SNMPagent:SNMP agreement provides the communication interface with EMS webmastering software SNMP Manager, and realizes the access control to MIB.This module is carried out transplanting development based on Net-SNMP5.0.2 open-source software bag, supports snmp v1/v2c, supports standard mib 2/EtherMIB etc., by the access control of SMUX (expansion agency agreement) realization to MIB in other functional modules.Web Server:HTTP access server module, by the administration configuration page of operation, response is based on the access request of http protocol, and realizes visit to smib by the snmp agreement, thereby finishes the system configuration and the maintenance of WEB mode.Telnet:TelnetClient login service module, the telnet client of use standard just can sign in on the SCU, the full frame control interface of ANSI/VT100 compatibility is provided, and the various command by CLI provides realizes operations such as relevant diagnosis, test, upgrading.Telnet functional module and system business module, the unification of system support module are compiled as a SAM process.(b) service sub-system, the major function of service sub-system is provided respectively by each professional submodule, by supporting subsystem that they are coupled together the concrete function of realizing EPON, be divided into function service class, driving interface class and bottom hardware on the whole and drive the class three major types.Comprise following function sub-modules as top block diagram of FIG function service class: 23Hot Plug Detection (being that hot plug detects and handles): hot plug detection and processing capacity module, be used for the state on the throne of real-time detecting system hardware integrated circuit board, and carry out corresponding software processes.Redundant Protection Swap (master control redundancy protecting and switch processings): the master control redundancy protecting with switch processing module; in the assurance system two main control units on the throne have only at one time one in running order; another piece is in stand-by state; and the relevant running status of monitoring in real time; just carry out auto switching in case break down, with the steady and continuous work of safeguards system.Upgrade (software upgrading): the C8000 system also provides the function of on-line software updating, after by the tftp agreement software loading being gone up to SCU, is being loaded into respectively on each veneer, finishes the online upgrading of each board software.VLAN (VLAN): be used to provide the further encapsulation of the api function that bottom VLAN is handled,, realize the administration configuration function of 802.1Q VLAN for the tension management interface provides configuration interface simply clearly.IGMP (multicast): be used to provide the further encapsulation of the api function that bottom IGMP snooping is handled,, realize the administration configuration function of IGMP snooping for the tension management interface provides configuration interface simply clearly.The Others module is the configuration feature that provides or remained to be expanded, the configuration feature that the C8000 system provides also comprises 802.1p priority, the agreement of SLA professional skill, ACL Access Control List (ACL), allocated bandwidth or the like, all need the respective handling function of bottom is done the secondary encapsulation, for the tension management interface provides clear unified api interface.The driving interface class comprises the PON chip: access control and interface function to the PON chip are provided, and after initialization the operation some threads, realize OLT/ONU detection, find automatically and dispose, functions such as mandate and encryption handling, service provisioning, statistic collection.The CMD module: the CMD module is the core that we need, the CMD module provides the interface of the order line of similar IOS, and it mainly provides command template management, order line registration, and order line is resolved, functions such as command execution are for we provide powerful command line interface.
3. basic working procedure is seen Fig. 3.
Plastic optical fiber bus optical information coupler structure and course of work block diagram as shown in Figure 4,
Its sandwich layer refractive index of the optical fiber of fiber optic network is N1, and cladding index is N2, N2＜N1; The refractive index of plastic optical fibre coupler is N3, so N3＜N1 incident light can enter fiber optic network, enters the back because N2＜N1 transmits in fiber optic network so light produces total reflection; Make the focusing that lens shape is beneficial to light at large-bore plastics fiber coupler front end, on the large-bore plastics fiber coupler, be carved with phase-shifted grating, be used for carrying out that light wave is carried out wavelength and select.The transmission window broad of Transmission Fibers covers the filter range of each fiber grating, and the light by each grating can both be transmitted in optical fiber, and the light of each wavelength is distinguished demodulation in Optical Network Terminal.
Finish the quick real-time monitoring of task occasion utilize industrial measurement and control bus and multisensor to carry out to(for) running parameter at needs, utilize large-bore plastics optical fiber information coupling and device various physical quantity transducer information by networked mode coupling and, make up the fiber optic Ethernet of industrial measurement and control, cooperate corresponding industrial measurement and control terminal and network software, realize the industrial measurement and control function that multi-parameter is measured fast.
Example one: adopt the plastic optical fiber bus optical information coupler to constitute the landslide monitoring system.
Landslide monitoring system monitoring bus system has each probe node that can carry out extension of network (by the IP address location), stress measurement node for example, strain-type distortion probe node, massif vibration information acquisition node, interference of light massif deformation information acquisition node; Collection of GPS massif deformation information and processing node etc.The sensor information of each optical transmission is coupled into the measurement and control bus system that adopts distributed fiber optic network by large-bore plastics optical fiber.Fiber-optic signal transmission bandwidth ability is strong because plastic optical fibre coupler makes the fiber buss embedded type sensor can not have the cable connection, by the detection and control terminal of distributed modular structure, finish by traditional 485 interfaces the multi-sensor information that can't finish transmit fast and the information location tasks.The transmission of plastic optical fiber bus embedded type sensor snap information can be handled for the complex software of signal processing and massif deformation recognition and win the quality time.Adopt the plastic optical fiber bus optical information coupler to constitute the landslide monitoring system as shown in Figure 5.
Example two: adopt plastic optical fiber bus embedded type sensor to constitute the landslide monitoring system.
System has the probe node that each can carry out extension of network (by the IP address location) by its function landslide monitoring system monitoring bus system, stress measurement node for example, the distortion probe node, massif deformation pattern information gathering node, interference of light massif deformation information acquisition node; GPS massif deformation information is gathered and processing node.The sensor information of each optical transmission is coupled into the distributed measurement and control bus system based on the monomode fiber network that adopts by large-bore plastics optical fiber.Fiber-optic signal transmission bandwidth ability is strong because plastic optical fiber bus embedded type sensor does not have the cable connection, detection and control terminal by the distributed modular structure, finish by 485 interfaces the multi-sensor information that can't finish transmit information location tasks fast, the transmission of plastic optical fiber bus embedded type sensor snap information could be handled for the complex software of signal processing and massif deformation recognition win the quality time.As shown in Figure 6.
1. equipment needs, and is connected with computer one cover of industrial optical fiber Ethernet, plastic fiber information coupler sensing terminal 3 covers, massif strain transducer 3 covers.One of fiber optic network switch, one of fiber optic network router.
2. plastic fiber information coupler controller architecture
Plastic fiber information coupler terminal is made of low-power consumption C8051 single-chip microcomputer, measures landslide strain transducer input by ADC, by DAC output control information, and optoelectronic information transceiver and photoelectricity coupling detection and control terminal exchange message.Photoelectricity coupling detection and control terminal exchange message is given address mark as the operational terminal information of optical fiber observing and controlling Ethernet by information network, measures the strain variation of landslide particular location.See Fig. 7.
Claims (1)
1. plastic optical fiber bus embedded type sensor device, it is characterized in that: single-chip microcomputer C8051 carries out the ADC information gathering to sensor signal, sensor signal is carried out the different wave length mode by light emission system and is transmitted to large-bore plastics optical fiber, large-bore plastics optical fiber carries out the reception of various sensor signals, and carry out wavelength filtering by PZT control optical fiber phase-shifted grating, realize each sensor information separation, the fiber optic network detection and control terminal is by each sensor information of photoelectric conversion technique, carry out the transducer physical address assignments by the IP address, and add time tag, be sent in the fiber optic network.
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|---|---|---|---|---|
| CN2669186Y (en) * | 2003-12-25 | 2005-01-05 | 秦一涛 | Distribution type optical-fiber sensitive monitoring device for dam leakage positioning |
| CN1689054A (en) * | 2002-08-30 | 2005-10-26 | 梁宽淑 | Fiber optic security system and control method thereof |
| CN1809203A (en) * | 2006-02-17 | 2006-07-26 | 东南大学 | Central power and environment monitoring method for unattended equipment room |
| US20080140324A1 (en) * | 2006-12-07 | 2008-06-12 | Keyence Corporation | Optical Displacement Sensor |
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- 2010-03-29 CN CN201010133644A patent/CN101854213A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1689054A (en) * | 2002-08-30 | 2005-10-26 | 梁宽淑 | Fiber optic security system and control method thereof |
| CN2669186Y (en) * | 2003-12-25 | 2005-01-05 | 秦一涛 | Distribution type optical-fiber sensitive monitoring device for dam leakage positioning |
| CN1809203A (en) * | 2006-02-17 | 2006-07-26 | 东南大学 | Central power and environment monitoring method for unattended equipment room |
| US20080140324A1 (en) * | 2006-12-07 | 2008-06-12 | Keyence Corporation | Optical Displacement Sensor |
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Application publication date: 20101006 |