CN1740890A - Multichannel optical fibre grating high-speed demodulating apparatus based on inserting technology - Google Patents
Multichannel optical fibre grating high-speed demodulating apparatus based on inserting technology Download PDFInfo
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Abstract
The multichannel fibre optics grating high-speed demodulation device based on embedded technique is formed from high-speed acquisition signal source, SoC single-chip computer high-speed data acquisition module of Cygnal, ARMT embedded microprocessor control module, 10M/100M network communication module, nRF905 wireless communication module, 12-bit DA conversion module, UART communication module, flash storage module and monitoring software module of PC machine terminal. Said invention also provides their connection mode and its application.
Description
Technical field
The invention belongs to optical fiber grating sensing, signals collecting and processing, health monitoring field, is a kind of multichannel optical fibre grating high-speed demodulating apparatus based on embedded technology specifically.
Background technology
At present mostly the Fibre Optical Sensor signal demodulating system of hyperchannel multiple spot is centralized processing system, promptly transducing signal gather, handle, analyze, show, function such as storage all concentrates among the PC, all functions are handled by PC, detuner does not possess processing capacity substantially.Though PC system function is complete, performance is higher, the price comparison costliness, especially when the monitoring structural health conditions control system of forming large-scale centralized needs many detuners, its serious waste of resources, and also cost is too high, more is unfavorable for the expansion of system upgrade and function.And in the dynamic monitoring of large scale structure engineering, require to realize high speed, high-precision data acquisition and processing.
Summary of the invention
The purpose of this invention is to provide a kind of multichannel optical fibre grating high-speed demodulating apparatus based on embedded technology, its adopts is that (SoC:System on Chip is a SOC (system on a chip) for the scheme of " SoC single-chip microcomputer+ARM7 ", ARM7: a kind of embedded microprocessor) based on reduced instruction set, the SoC single-chip microcomputer carries out high-speed signal acquisition, ARM7 carries out simple data with the data of gathering to be handled and Network Transmission, the independently developed monitoring client software of operation on the PC, to receive data analysis by Network Transmission, the demodulation of fiber grating sensing signal high speed and the data collector based on embedded technology of dynamic demonstration and stored data base are to overcome above-mentioned deficiency.
To achieve these goals, the present invention is by the high speed acquisition signal source, the SoC single-chip microcomputer high-Speed Data-Acquisition Module of Cygnal, ARM7 embedded microprocessor control module, 10M/100M network communication module, the nRF905 wireless communication module, 12 DA modular converters, the UART communication module, the flash memory module, compositions such as the monitoring software module of PC end, wherein the high speed acquisition signal source is connected with the SoC single-chip microcomputer high-Speed Data-Acquisition Module of Cygnal by special purpose interface, 10M/100M network communication module, 12 DA modular converters, the UART communication module, the flash memory module all is connected with ARM7 embedded microprocessor control module, and the monitoring software module of PC end is connected by the 10M/100M network based on ICP/IP protocol.
The SoC single-chip microcomputer high-Speed Data-Acquisition Module of above-mentioned Cygnal is by SPI universal serial bus and ARM7 embedded microprocessor control module transmission data, and ARM7 embedded microprocessor control module is by the monitoring software module transmission data of 10M/100M Ethernet module or nRF905 wireless module and PC end.
Above-mentioned ARM7 embedded microprocessor control module is by 12 D/A converters control F-P filter scan voltages, scan tuning voltage from motion tracking.
The present invention is divided into three grades of sub-devices by function.
The first order is the high speed acquisition signal source, its with original optical wavelength signal through opto-electronic conversion, amplification and shaping circuit output electric pulse sequence signal.Comprise 5 fibre optic sensor arra interface channels, sensing system protection and stable module and fiber F-P filter scan control module.5 Fibre Optical Sensor input channels are made up of 4 measurement passages and 1 reference channel (built-in); Sensing system protection and stable module provide the burning voltage of each functional module of system, and are under the abnormal work states such as over-voltage and over-current or sensor outrange in system, provide photoelectricity insulation blocking of voltage stabilizing current limliting and alerting signal to sensing system; Fiber F-P filter scan control module produces the scanning voltage of standard high-precision saws wave function control F-P wave filter.
The second level is based on the sub-device of high-speed data acquisition, processing and transmission of embedded technology, comprising Cygnal SoC single-chip microcomputer, ARM7 embedded microprocessor, 10M/100M Ethernet communication module, nRF905 wireless communication module, 12 DA modular converters, UART communication module, flash memory module.Cygnal SoC single-chip microcomputer is connected with first order high speed acquisition signal source; The ARM7 embedded microprocessor is by SPI interface and Cygnal SoC single chip communication; UART communication module, 10M/100M network communication module, wireless communication module and flash memory module directly are connected with the ARM7 embedded microprocessor; The input end of 12 DA modular converters is connected with the ARM7 embedded microprocessor, and output terminal is connected with the fiber F-P filter scan control circuit that is arranged in the first order.The sub-device characteristic in the second level is:
1, hyperchannel multiple spot: utilize Cygnal SoC single-chip microcomputer pulse capture functional module, realize the collection of hyperchannel multiple spot fiber grating sensing signal, but the number of sensors on each passage of flexible configuration, sensor sum maximum on the single detuner can reach 180, the convenient needs of realizing that the different distributions formula is measured;
2, high resolving power: be 250Hz in frequency, when sweep limit is not less than 50nm, the highest demodulation resolution is 1pm;
3, high speed: the sensor sum on the single detuner is no more than at 160 o'clock, and when resolution was 1pm, frequency, demodulation frequency can reach 250Hz; When the sensor sum on the single detuner was no more than 80, when resolution was 2pm, frequency, demodulation frequency can reach 500Hz.
4, adaptivity: in SoC pulse capture functional module inside, realized different frequency signals is carried out demodulation process first, do not needed change that parameter is set based on the five equilibrium principle.
Embedded fiber sensing and demodulating device box is formed in the first order and the second level.
The third level is upper PC workstation.The independently developed monitoring client software of operation on the PC, software is mainly realized functions such as Data Receiving, database storing, graphic presentation and the inquiry of historical data.Connect by the network based on ICP/IP protocol, the monitoring software that moves on the PC can be monitored maximum 4 embedded fiber sensing and demodulating device boxes of being made up of SoC single-chip microcomputer and ARM7 simultaneously, promptly monitors, monitors nearly 16 passages simultaneously.
The present invention is based on embedded technology, realize multichannel, adaptive high speed signal demodulation, simultaneity factor is simple in structure, is applicable to and forms large-scale distributed monitoring system, and help system upgrade and function expansion.The present invention is with system architecture and functional classification, utilize lower-cost embedded chip to realize crucial function---the high speed acquisition and the transmission of data, and the function that the analysis of data, storage, graphic presentation etc. are taken time and effort places upper PC, the software that development function is powerful, performance is remarkable is realized, both reduced system cost, make the present invention be suitable for large-scale distributed and concentrated monitoring scheme again, have the potentiality that are easy to upgrade with the function expansion.
Description of drawings
Fig. 1 is for being high speed acquisition signal source theory structure block diagram of the present invention.
Fig. 2 is embedded data acquisition of the present invention, control device structured flowchart.
Fig. 3 is the large-scale distributed Embedded intelligent high-speed collection monitoring system synoptic diagram based on Internet of the present invention.
Fig. 4 is a scanning voltage control principle block diagram of the present invention.
Fig. 5 is applied to the embodiment theory diagram of bridge health monitoring for the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are further described, but this embodiment should not be construed as limitation of the present invention.
As shown in Figure 1, high speed acquisition signal source of the present invention is mainly by the LED wideband light source, the F-P wave filter, and F-P filter scan control module, opto-electronic conversion, amplification and shaping circuit module, several parts such as 5 channel fibre channel light paths are formed.What the F-P wave filter adopted is the voltage-controlled FFP-TF wave filter of MIRCON OPTICS company, and its sweep limit is 60nm.By constantly in the effect of gate voltage, add the scanning voltage of a sawtooth wave to the voltage-controlled end of FFP-TF wave filter, wideband light source forms the line source that wavelength changes from low to high in measurement range by the FFP-TF wave filter, and be injected into each passage optical fiber Bragg grating sensor, the signal of the reflection of each passage bragg fiber-optic grating sensor carries out opto-electronic conversion, amplification and shaping respectively, obtains one and the corresponding time domain electric impulse signal of reflection narrow band light spectrum.
As shown in Figure 2, this embedded hardware module mainly realizes that by the ARM7 process chip S3C44B0 of the C8051F02X of Cygnal company series SoC single-chip microcomputer, Samsung embedded microprocessor module, 12 DA modular converters, UART communication module, 10M/100M network communication module (perhaps nRF905 wireless communication module), flash memory module etc. form.The SoC single-chip microcomputer of Cygnal is in conjunction with the scanning gate-control signal, and the electric impulse signal of measuring each passage is with respect to the relative time that scans the initial moment of gate-control signal, with 2Byte shaping data representation.Then these are detected data and be sent to the ARM7 microprocessor by the SPI serial communication bus.ARM does some simple process with these data, and by RTL8019 (based on the 10M/100M network interface of TCP/IP) these data is sent to upper PC.The UART communication module is used for embedded system is debugged and disposed.Flash storage system parameter and configuration information.ARM does the simply dealt while to data, calculates the tuning amount of 12 F-P filter scan control voltages, and delivers to the D/A converter output aanalogvoltage of 12bit.
The present invention adopts multichannel PCA (Programmable Counter Array) the pulse capture function on the SoC single-chip microcomputer to realize the collection of hyperchannel multiple spot fiber grating sensing signal, but the number of sensors on each passage of flexible configuration, sensor sum maximum on the single detuner can reach 180, the convenient needs of realizing that the different distributions formula is measured.In PCA inside, different frequency signals is carried out demodulation process simultaneously, do not need change that parameter is set, realized the adaptivity of frequency, demodulation frequency based on the five equilibrium principle.Be 250Hz in sweep frequency, when sweep limit is not less than 50nm, the highest demodulation resolution of SoC single-chip microcomputer is 1pm.In addition, the system clock of SoC single-chip microcomputer is 25MHz, 16MHz greater than index request, therefore the sensor sum on the single detuner is no more than at 160 o'clock, and when resolution was 1pm, frequency, demodulation frequency can reach 250Hz, when the sensor sum on the single detuner is no more than 80, when resolution was 2pm, frequency, demodulation frequency can reach 500Hz, had realized high resolving power and performance at a high speed.
Fig. 3 has provided the extensive central controlled distributed embedded intelligence high speed acquisition supervisory system synoptic diagram based on the TCP/IP network, and each Monitor And Control Subsystem carries out dynamic monitoring to a concrete object, as dam or bridge etc.These subsystems can further be analyzed and manage in Surveillance center in conjunction with expert system the concrete state of monitoring objective.
Fig. 5 is applied to the embodiment theory diagram of bridge health monitoring for the present invention.The present invention is applicable to dynamic monitoring and Static Detection, can be used for structure monitoring, steel construction strain testing, oil platform monitoring, large-scale healthy thing safety monitoring of bridge health monitoring, culvert etc.This system can also be used to some special structures are carried out the high-resolution dynamic monitoring in addition, as Performance Detection of various spacecraft coverings or the like.System adopts the large-scale distributed software support platform based on the TCP/IP network, makes things convenient for the user to carry out the system integration of various functions.
Software of the present invention is: SoC single-chip microcomputer high-speed signal acquisition system software, employing be the integrated exploitation of μ Version2, debugging and translation and compiling environment, by JTAG communication port compiling with download.
This program mainly realizes following function: data sampling and processing, based on data transmission of SPI universal serial bus etc.Data sampling and processing adopt PCA to catch pulse, and in conjunction with the scanning gate-control signal, the electric impulse signal of measuring each passage is with respect to the relative time that scans the initial moment of gate-control signal, with 2Byte shaping data representation.Be responsible for giving S3C44B0 based on the SPI universal serial bus with data.
Based on embedded Control, the communication system software of S3C44B0, employing be μ COSII+Lwip embedded real-time operating system and network protocol stack, and the integrated exploitation of SDT2.5, debugging and translation and compiling environment are by the compiling of JTAG communication port with download.
This program is mainly finished following function: based on the Data Receiving of SPI universal serial bus, 10M/100M network data transmission, flash data storage, monitoring of scanning tuning voltage etc. based on ICP/IP protocol.S3C44B0 receives the data that the SoC single-chip microcomputer sends by the SPI interface, and data layout is a user-defined format.S3C44B0 presses the user-defined format packing by RTL8019 (10M/100M network) with data, sends to upper PC with TCP or UDP bag.Simultaneously, S3C44B0 does simple process to data, calculates the tuning amount of 12 F-P filter scan control voltages, and delivers to the D/A converter output aanalogvoltage of 12bit.
Monitoring software system on the PC adopts the integrated exploitation of VC6.0, debugging and translation and compiling environment.
This program is mainly finished following function: packet is accepted real-time waveform demonstration, detuner monitoring of processing, database storing, data analysis and calculating, hyperchannel multiple spot etc.Software is at first accepted packet, and unpacks by user-defined format, and the data after will explaining are again carried out physics quantitative analysis and calculating, then can be with the data storage after handling to database.Software can be shown in the situation of change of the physical quantity of the point in some passages mode with waveform on the display.The specific implementation details of each function of software can be selected by parameter is set.Monitoring software on PC can be monitored maximum 4 embedded detuner boxes of being made up of SoC single-chip microcomputer and ARM7 simultaneously.
The content that is not described in detail in this instructions belongs to this area professional and technical personnel's known prior art.
Claims (4)
1, a kind of multichannel optical fibre grating high-speed demodulating apparatus based on embedded technology, by the high speed acquisition signal source, the SoC single-chip microcomputer high-Speed Data-Acquisition Module of Cygnal, ARM7 embedded microprocessor control module, 10M/100M network communication module, the nRF905 wireless communication module, 12 DA modular converters, the UART communication module, the flash memory module, compositions such as the monitoring software module of PC end, wherein the high speed acquisition signal source is connected with the SoC single-chip microcomputer high-Speed Data-Acquisition Module of Cygnal by special purpose interface, 10M/100M network communication module, 12 DA modular converters, the UART communication module, the flash memory module all is connected with ARM7 embedded microprocessor control module, and the monitoring software module of PC end is by being connected with 10M/100M network or wireless communication module based on ICP/IP protocol.
2, the multichannel optical fibre grating high-speed demodulating apparatus based on embedded technology as claimed in claim 1, it is characterized in that: the SoC single-chip microcomputer high-Speed Data-Acquisition Module of Cygnal is by SPI universal serial bus and ARM7 embedded microprocessor control module transmission data, and ARM7 embedded microprocessor control module is by the monitoring software module transmission data of 10M/100M Ethernet module or nRF905 wireless module and PC end.
3, the multichannel optical fibre grating high-speed demodulating apparatus based on embedded technology as claimed in claim 1, it is characterized in that: ARM7 embedded microprocessor control module is by 12 D/A converters control F-P filter scan voltages, scan tuning voltage from motion tracking.
4, multichannel optical fibre grating high-speed demodulating apparatus based on embedded technology as claimed in claim 1, it is characterized in that: the high speed acquisition signal source comprises 5 fibre optic sensor arra interface channels, sensing system protection and stable module and fiber F-P filter scan control module, 5 Fibre Optical Sensor input channels are made of 4 measurement passages and 1 reference channel, wherein sensing system protection and stable module provide the burning voltage of each functional module of system, and be under the abnormal work states such as over-voltage and over-current or sensor outrange in system, provide photoelectricity insulation blocking of voltage stabilizing current limliting and alerting signal to sensing system; Fiber F-P filter scan control module produces the scanning voltage of standard high-precision saws wave function control F-P wave filter.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100580383C (en) * | 2008-10-17 | 2010-01-13 | 中国科学院上海光学精密机械研究所 | Embedded multi-channel high-speed fiber grating sensor demodulation system |
| CN101216327B (en) * | 2008-01-08 | 2010-10-13 | 西安石油大学 | High precision optical fiber grating sensing signal demodulation instrument |
| CN102735270A (en) * | 2012-06-29 | 2012-10-17 | 西北核技术研究所 | Wavelength-scanning-based active fiber Bragg grating time domain demodulating device |
| CN103344265A (en) * | 2013-07-06 | 2013-10-09 | 北京航空航天大学 | Fiber bragg grating demodulation instrument |
| CN103822646A (en) * | 2014-03-03 | 2014-05-28 | 武汉理工大学 | Method for demodulating long distance light delayed effect in fiber bragg grating demodulation system |
| CN104052609A (en) * | 2014-03-10 | 2014-09-17 | 海口丰润动漫单片机微控科技开发有限公司 | Flash-Server embedded type network server module |
| CN114543887A (en) * | 2022-02-25 | 2022-05-27 | 北京卫星环境工程研究所 | Optical fiber type multi-module comprehensive test system |
-
2005
- 2005-08-22 CN CN 200510019332 patent/CN1740890A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216327B (en) * | 2008-01-08 | 2010-10-13 | 西安石油大学 | High precision optical fiber grating sensing signal demodulation instrument |
| CN100580383C (en) * | 2008-10-17 | 2010-01-13 | 中国科学院上海光学精密机械研究所 | Embedded multi-channel high-speed fiber grating sensor demodulation system |
| CN102735270A (en) * | 2012-06-29 | 2012-10-17 | 西北核技术研究所 | Wavelength-scanning-based active fiber Bragg grating time domain demodulating device |
| CN102735270B (en) * | 2012-06-29 | 2015-01-21 | 西北核技术研究所 | Wavelength-scanning-based active fiber Bragg grating time domain demodulating device |
| CN103344265A (en) * | 2013-07-06 | 2013-10-09 | 北京航空航天大学 | Fiber bragg grating demodulation instrument |
| CN103344265B (en) * | 2013-07-06 | 2015-08-26 | 北京航空航天大学 | A kind of fiber Bragg grating (FBG) demodulator |
| CN103822646A (en) * | 2014-03-03 | 2014-05-28 | 武汉理工大学 | Method for demodulating long distance light delayed effect in fiber bragg grating demodulation system |
| CN103822646B (en) * | 2014-03-03 | 2016-03-30 | 武汉理工大学 | The demodulation method of optical fiber grating regulating system middle and long distance light delay effect |
| CN104052609A (en) * | 2014-03-10 | 2014-09-17 | 海口丰润动漫单片机微控科技开发有限公司 | Flash-Server embedded type network server module |
| CN104052609B (en) * | 2014-03-10 | 2016-08-17 | 海口丰润动漫单片机微控科技开发有限公司 | Flash-Server embedded web server module |
| CN114543887A (en) * | 2022-02-25 | 2022-05-27 | 北京卫星环境工程研究所 | Optical fiber type multi-module comprehensive test system |
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