CN106197648A - Fiber-optic vibration interference signal real-time data acquisition and transmitting device and application thereof - Google Patents
Fiber-optic vibration interference signal real-time data acquisition and transmitting device and application thereof Download PDFInfo
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- CN106197648A CN106197648A CN201610584379.4A CN201610584379A CN106197648A CN 106197648 A CN106197648 A CN 106197648A CN 201610584379 A CN201610584379 A CN 201610584379A CN 106197648 A CN106197648 A CN 106197648A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
-
- 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
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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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
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
-
- 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
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2656—Instrumentation
Abstract
The invention belongs to sensory field of optic fibre, relate to High speed data acquisition, it it is a kind of big data quantity for distributed optical fiber vibration sensing system, real-time fiber-optic vibration interference signal real-time data acquisition and transmitting device and application thereof, it is characterized in that being provided with super-narrow line width laser instrument, photomodulator, image intensifer, circulator, sensor fibre, wave filter, photodetector, gather and transmitting device and PC, the invention have the advantages that (1) this device uses PCIE interface to communicate with main frame, overcome the shortcoming that traditional harvester traffic rate is slow；(2) noise during this device uses the data that digital signal processing module suppression gathers, improves the signal to noise ratio of harvester；(3) this device uses DDR III memorizer, it is possible to achieve substantial amounts of, real-time data acquisition.
Description
Technical field
The invention belongs to sensory field of optic fibre, relate to High speed data acquisition, be a kind of for distributed optical fiber vibration
The big data quantity of sensor-based system, real-time fiber-optic vibration interference signal real-time data acquisition and transmitting device and application thereof.
Background technology
Distributed optical fiber sensing system, with whole piece optical fiber as sensing element, utilizes the scattering phenomenon in optical fiber, and it is right to realize
On sensor fibre, the continuous distribution formula of measured physical quantity is measured.When optical fiber is stressed effect, length (the strain effect of optical fiber
Should), the diameter (poisson effect) of fibre core, fiber core refractive index (photoelastic effect) all can change, these changes all can cause in optical fiber
The change of phase of light wave.Distributed optical fiber sensing system, with whole piece optical fiber as sensing element, utilizes the scattering phenomenon in optical fiber, can
Realize the continuous distribution formula of measured physical quantity on sensor fibre is measured.
Distributed optical fiber vibration sensing system uses φ-OTDR technique, and be injected in optical fiber is the most highly coherent, is
The result of interference of the backward Rayleigh scattering light that light produces in a fiber is detected in system output pulse width region.By launching arteries and veins
Washing and receive the time delay of backward Rayleigh scattering light off, φ-OTDR can position the disturbance in optical fiber somewhere.When certain portion of optical fiber
When position is disturbed, due to elasto-optical effect, the refractive index at this will change, thus cause the phase change of light wave at this,
Due to interference effect, the change of light phase will cause backward Rayleigh scattering light light intensity to change, after adjacent two moment
The disturbance that can detect and position outer bound pair optical fiber is subtracted each other to Rayleigh scattering curve.
The Changing Pattern gathering the interference signal in optical fiber is the foundation judging external interference behavior, the quantity of information persistent period
Length and the speed of transmission directly affect backstage and resolve, therefore will accurately, analytic signal accurately, thus carry out pattern knowledge
Not, needing a high speed, real time signal aquisition device, traditional optical fiber vibration sensing system generally uses the most general adopting
Truck, such capture card generally there are following shortcoming: (1) transmission speed is slow；(2) memory element capacity is little, it is impossible to storage is big
The field data of amount, limits measurement capability and the real time data acquisition transmittability of system.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is provided that a kind of fiber-optic vibration interference signal being applicable to distance counts in real time
According to gathering and transmitting device and application thereof.
For solving not enough problem of the prior art, present invention employs following technical scheme:
A kind of fiber-optic vibration interference signal real-time data acquisition and transmitting device, it is characterised in that be provided with super-narrow line width laser instrument,
Photomodulator, image intensifer, circulator, sensor fibre, wave filter, photodetector, collection and transmitting device and PC, its
The continuous light that middle super-narrow line width laser instrument sends is after light modulator modulates becomes pulsed light, then amplifies through image intensifer, warp
Circulator enters sensor fibre, and pulsed light occurs Rayleigh scattering and interference in sensor fibre, interferes light through circulator and filter
Ripple device enters photodetector and changes into the signal of telecommunication, and the signal of telecommunication carries out data acquisition and transmission through gathering with transmitting device,
It upload the data to PC eventually be analyzed and show.
Collection of the present invention and transmitting device are provided with ADC transducer, FPGA unit, DDR III memorizer, PCIE connect
Mouthful, wherein FPGA unit is connected with ADC transducer, DDR III memorizer, PCIE interface respectively, sets in described FPAG unit
ADC acquisition controlling unit, digital signal processing module, cache module, data are had to transport block of state, DDR III memorizer control
Molding block, DMA read control module, transmission control module, configuration information collection and output module, interface modular converter, MSI interrupt
Cache module, dma descriptor module, acquisition control module, capture card parameter control module, triggering signal generator module, RC_
Slave data transmission module, PCIE stone, triggering selection module.
Further, described ADC acquisition controlling unit is connected with ADC transducer, controls and receive ADC transducer to gather number
According to.
Further, described digital signal processing module is connected with ADC acquisition controlling unit, to ADC acquisition controlling unit
The data received carry out Digital Signal Processing, and described Digital Signal Processing is primarily referred to as cumulative being averaging.
Further, described cache module is connected with digital signal processing module, the Digital Signal Processing mould described in caching
The data that block process terminates.
Further, which kind of mode is the data that residing data transhipment block of state is used for controlling in cache module be by
Transmitting to main frame, described mode is the DDR III SDRAM first data stored to outside including first kind of way
Memorizer sends data to main frame with dma mode by PCIE interface the most again；The second is directly will with dma mode
Data are transmitted to main frame by PCIE interface.
Further, described DMA read control module and transmission control module jointly achieve the DMA of PCIE interface and read transmission
Mode.
Further, Avalon-ST is received signal and is converted into Data/Descriptor reception by described interface modular converter
Signal, is suitable for application layer and processes data according to submitting a tender.
Further, described MSI interrupt cache module, caching sends the data that control module sends to host PC IE stone
Completing Transmission signal, when total data is all transmitted, MSI interrupt cache module sends interrupt signal number to system
According to.
Further, described configuration information collection and output module, respectively at configuration signal line, the transmission control of PCIE stone
Molding block is connected with RC_slave transport module, is used for receiving the content of the configuration register of the configuration space of PCIE stone,
For sending control module and RC_slave transport module；The configuration that RC_slave transport module can update PCIE stone is empty
The leader depositor in advanced error reporting capabilities Parasites Fauna between, with to host computer system reporting communication errors.
Further, described RC_slave transport module is connected with capture card parameter control module, dma descriptor module,
It is used for the function of Common data transmission, including capture card acquisition parameter being arranged data and the phase of DMA transfer mode
Close the setting of depositor.
Further, described dma descriptor control module is used for receiving and sends control module or host computer system transmission
The configuration parameter of DMA transfer mode, start DMA data transfer.
Further, described capture card parameter control module is used for joining of the capture card parameter that Receiving Host system issues
Confidence ceases the information such as such as sampling number, accumulative frequency, triggering mode.
Further, described acquisition control module is used for controlling when ADC acquisition controlling unit carries out ADC transducer and adopt
The data receiver of collection.
Further, described triggering signal generator module, the triggering signal configuration parameter information issued according to host computer system
Produce the triggering signal of corresponding frequencies.
Further, described triggering selection module, the triggering signal configuration parameter information issued according to host computer system is to adopting
The inside and outside triggering mode of collecting system selects.
Further, described PCIE stone is the IP kernel existed with stone form inside fpga chip, by suitably joining
Put and be used for realizing PCIE host-host protocol.
Further, the read-write operation of described DDR III memory control module controls DDR III memorizer, described
The collection data that DDR III memorizer has processed through digital signal processing module for storage.
Further, described ADC transducer is used for analog data is converted into numerical data.
The invention allows for the using method of a kind of fiber-optic vibration interference signal real-time data acquisition and transmitting device, its
It is characterised by including herein below:
Step S01, completes the power-up initializing of each functional unit block of harvester；
Step S02, initializes PCIE communication interface, completes the configuration of PCIE communication interface；
Step S03, the configuration information of the acquisition parameter of harvester Receiving Host system hair washing, and complete the relevant of harvester
The configuration of acquisition parameter；
Step S04, ADC acquisition controlling unit starts to receive ADC transducer under triggering the control of signal and acquisition control module
Conversion numerical data and send data to digital signal processing module；
Step S05, digital signal processing module is processed and transmitted to cache module caching to the data received；
Step S06, the acquisition parameter configuration information sent according to main frame determines it is directly by DMA side by the data of cache module
Formula transmission is still transferred in DDR III memorizer to host computer system；
Step S07, harvester configuration has configured DMA channel according to the requirement of host computer system；
Step S08, the data in cache module are stored to DDR III memorizer, all count by DDR III storage control module
After being transmitted, it is already prepared to by MSI interrupt cache module notice host computer system data, prepares to start DMA channel
Transmission；
Step S09, harvester is started DMA channel transmission, the data of harvester is spread out of to main frame system by PCIE interface
System；
Step S10, data end of transmission, harvester sends MSI interrupt signal to host computer system, and notice host computer system data are
Through end of transmission；
Step S11, host computer system is according to gathering needs, and whether notice harvester continues new collection, if continuing to gather, returns
Returning step S04, otherwise exit, harvester enters idle condition.
The invention have the advantages that (1) this device uses PCIE interface to communicate with main frame, overcome traditional adopting
The shortcoming that acquisition means traffic rate is slow；(2) noise during this device uses the data that digital signal processing module suppression gathers, carries
The signal to noise ratio of high harvester；(3) this device uses DDR III memorizer, it is possible to achieve substantial amounts of, real-time data acquisition.
Accompanying drawing explanation
Accompanying drawing 1 applies the overall system diagram in distributed optical fiber vibration system for the present invention.
Accompanying drawing 2 is a kind of fiber-optic vibration interference signal real-time data acquisition structural representation with transmitting device of the present invention
Figure.
Accompanying drawing 3 is a kind of fiber-optic vibration interference signal real-time data acquisition workflow with transmitting device of the present invention
Figure.
Reference: super-narrow line width laser instrument 1, photomodulator 2, image intensifer 3, circulator 4, wave filter 5, photodetection
Device 6, gather and transmitting device 7, PC 8, ADC transducer 9, FPGA unit 10, DDR III memorizer 11, PCIE interface 12,
ADC acquisition controlling unit 101, digital signal processing module 102, cache module 103, data transhipment block of state 104, DDR
III memory control module 106, DMA read control module 105, transmission control module 107, configuration information collection and output module
108, interface modular converter 109, MSI interrupt cache module 110, dma descriptor module 112, acquisition control module 113, collection
Card parameter control module 114, trigger signal generator module 116, RC_slave data transmission module 115, PCIE stone 111, touch
Send out and select module 117.
Detailed description of the invention:
The present invention is described further below in conjunction with the accompanying drawings.
Fig. 1 is that the present invention applies the overall system diagram in distributed optical fiber vibration system
Fig. 2 is a kind of fiber-optic vibration interference signal real-time data acquisition and the transmitting device of the present invention
As it is shown in figure 1, what super-narrow line width laser instrument 1 sent continuous light is modulated into pulsed light through photomodulator 2 and puts through light
Big device 3 amplifies, and enters sensor fibre through circulator 4, and pulsed light occurs Rayleigh scattering in sensor fibre, obtains Rayleigh dorsad and dissipates
Penetrating light, the back-scattering light of diverse location has overlap, therefore can interfere, and interferes light to enter through circulator 4 and wave filter 5
Photodetector 6 changes into the signal of telecommunication, carries out data acquisition and transmission through gathering with transmitting device 7, and data are uploaded the most at last
It is analyzed to PC 8 and shows.
Gather and transmitting device 7 is exactly a kind of fiber-optic vibration interference signal real-time data acquisition of the present invention and transmits dress
Put, as in figure 2 it is shown, the ADC transducer 9 including connecting successively, FPGA unit 10, PCIE interface 12, DDR III memorizer 11.
In the present embodiment, PCIE interface 12 is connected with FPGA unit 10, realizes high speed by PCIE interface 12 real-time
Data acquisition and transfer function.
In the present embodiment, FPGA unit 10 is connected with DDR III11 memorizer, it is achieved jumbo collection data are deposited
Storage.
In the present embodiment, be provided with in FPGA unit ADC acquisition controlling unit 101, digital signal processing module 102,
Cache module 103, data are transported block of state 104, DDR III memory control module 106, DMA read control module 105, are sent out
Send control module 107, configuration information collection and output module 108, interface modular converter 109, MSI interrupt cache module 110,
Dma descriptor module 112, acquisition control module 113, capture card parameter control module 114, trigger signal generator module 116,
RC_slave data transmission module 115, PCIE stone 111, triggering selection module 117.
In the present embodiment, acquisition controlling unit 101 is believed with ADC transducer 1, triggering selection module 117 and numeral respectively
Number processing module 102 connects, and receives the signal that triggers that triggering selection module 117 sends and controls and by the number of ADC transducer conversion 1
Digital data is transmitted to digital signal processing module 102.
In the present embodiment, PCIE stone 111 respectively with RC_slave transport module 115, MSI interrupt cache module 110,
Interface modular converter 109, configuration information collection and output module are connected 108, it is possible to achieve the dma mode of PCIE interface and common
The data transmission of mode.
In the present embodiment, DMA read control module 105 and transmission control module 107, DDR III memory control module
111, data transhipment block of state 104, completes the data in cache module 103 or the number in DDR III memory module 111
According to directly being transmitted to host computer system by dma mode.
In the present embodiment, capture card parameter control module 114 and acquisition control module 113, triggering signal generator module
116, RC_slave transport module 115 is connected, the acquisition parameter configuration information that Receiving Host system issues, and controls to trigger signal and produces
Raw module 116 produces the triggering signal required, controls the reception of ADC acquisition controlling unit 101 and gathers data.
Fig. 3 is the workflow diagram of a kind of high speed and real time sampling transmitting device of the present invention.
Below by Fig. 3 by description detailed for the work process of a kind of high speed and real time sampling transmitting device of the present invention.
Step S01, completes the power-up initializing of each functional unit block of harvester.
Step S02, initializes PCIE communication interface, completes the configuration of PCIE communication interface.
Step S03, the configuration information of the acquisition parameter of harvester Receiving Host system hair washing, and complete harvester
The configuration of correlation acquisition parameter
Step S04, ADC acquisition controlling unit starts to receive ADC transducer under triggering the control of signal and acquisition control module
Conversion numerical data and send data to digital signal processing module.
Step S05, digital signal processing module is processed and transmitted to cache module caching to the data received.
Step S06, determines according to the acquisition parameter configuration information of main frame transmission and the data of cache module is directly passed through
Dma mode transmission is still transferred in DDR III memorizer to host computer system
Step S07, harvester configuration has configured DMA channel according to the requirement of host computer system.
Step S08, the data in cache module are stored to DDR III memorizer, entirely by DDR III storage control module
After portion's data are transmitted, it are already prepared to by MSI interrupt cache module notice host computer system data, prepare to start DMA
Channel transfer.
Step S09, harvester is started DMA channel transmission, the data of harvester is spread out of to master by PCIE interface
Machine system.
Step S10, data end of transmission, harvester sends MSI interrupt signal to host computer system, notifies host computer system number
According to end of transmission.
Step S11, host computer system is according to gathering needs, and whether notice harvester continues new collection, if continuing to gather
Then returning step S04, otherwise exit, harvester enters idle condition.
In a word, what embodiments of the invention were announced is its preferably embodiment, but is not limited to this.This area common
Technical staff, easily according to above-described embodiment, understands the spirit of the present invention, and makes different amplifications and change, but as long as not taking off
From the spirit of the present invention, all within protection scope of the present invention.
Claims (8)
1. a fiber-optic vibration interference signal real-time data acquisition and transmitting device, it is characterised in that be provided with super-narrow line width laser
Device, photomodulator, image intensifer, circulator, sensor fibre, wave filter, photodetector, collection and transmitting device and PC
Machine, the continuous light that wherein super-narrow line width laser instrument sends is after light modulator modulates becomes pulsed light, then puts through image intensifer
Greatly, entering sensor fibre through circulator, there is Rayleigh scattering and interference in pulsed light in sensor fibre, interferes light through circulator
Entering photodetector with wave filter and change into the signal of telecommunication, the signal of telecommunication carries out data acquisition and biography through gathering with transmitting device
Defeated, finally it upload the data to PC and be analyzed and show.
A kind of fiber-optic vibration interference signal real-time data acquisition the most according to claim 1 and transmitting device, its feature exists
Being provided with ADC transducer, FPGA unit, DDR III memorizer, PCIE interface in described collection and transmitting device, wherein FPGA is mono-
Unit is connected with ADC transducer, DDR III memorizer, PCIE interface respectively, is provided with ADC acquisition controlling in described FPAG unit
Unit, digital signal processing module, cache module, data transhipment block of state, DDR III memory control module, DMA read control
Molding block, transmission control module, configuration information collection and output module, interface modular converter, MSI interrupt cache module, DMA retouch
State symbol module, acquisition control module, capture card parameter control module, trigger signal generator module, RC_slave data transmission mould
Block, PCIE stone, triggering selection module.
A kind of fiber-optic vibration interference signal real-time data acquisition the most according to claim 2 and transmitting device, its feature exists
It is connected with ADC transducer in described ADC acquisition controlling unit, controls and receive ADC transducer to gather data.
A kind of fiber-optic vibration interference signal real-time data acquisition the most according to claim 2 and transmitting device, its feature exists
Being connected with ADC acquisition controlling unit in described digital signal processing module, the data receiving ADC acquisition controlling unit are carried out
Digital Signal Processing, described Digital Signal Processing is primarily referred to as cumulative being averaging.
A kind of fiber-optic vibration interference signal real-time data acquisition the most according to claim 2 and transmitting device, its feature exists
It is connected with digital signal processing module in described cache module, the number that the digital signal processing module process described in caching terminates
According to.
A kind of fiber-optic vibration interference signal real-time data acquisition the most according to claim 2 and transmitting device, its feature exists
The data being used for controlling in cache module in residing data transhipment block of state are by which kind of mode to be transmitted to main frame, institute
The mode stated is first data to be stored to outside DDR III SDRAM memory including first kind of way the most again
Main frame is sent data to by PCIE interface with dma mode；The second is directly data to be connect by PCIE with dma mode
Main frame is transported in oral instructions.
A kind of fiber-optic vibration interference signal real-time data acquisition the most according to claim 2 and transmitting device, its feature exists
The DMA jointly achieving PCIE interface in described DMA read control module and transmission control module reads transmission means, and described connects
Avalon-ST is received signal and is converted into Data/Descriptor reception signal by mouth modular converter, is suitable for application layer according to bid
Processing data, described MSI interrupt cache module, caching sends the data that control module sends to host PC IE stone
Completing Transmission signal, when total data is all transmitted, MSI interrupt cache module sends interrupt signal number to system
According to, described configuration information collection and output module, respectively at configuration signal line, transmission control module and the RC_ of PCIE stone
Slave transport module is connected, and is used for receiving the content of the configuration register of the configuration space of PCIE stone, controls mould for sending
Block and RC_slave transport module use；RC_slave transport module can update the senior mistake in the configuration space of PCIE stone
The leader depositor in capabilities register group is accused in wrong report, with to host computer system reporting communication errors, described RC_slave transmission
Module is connected with capture card parameter control module, dma descriptor module, is used for the function of Common data transmission, including
Capture card acquisition parameter arranges the setting of the related register of data and DMA transfer mode, and described dma descriptor controls
Module is used for receiving the configuration parameter of the DMA transfer mode sending control module or host computer system transmission, starts DMA data
Transmission, described capture card parameter control module is used for the configuration information of the capture card parameter that Receiving Host system issues such as
The information such as sampling number, accumulative frequency, triggering mode, described acquisition control module is used for controlling ADC acquisition controlling unit
When carry out the data receiver of ADC transducer collection, described triggering signal generator module, the triggering issued according to host computer system
Signal configuration parameter information produces the triggering signal of corresponding frequencies, described triggering selection module, issues according to host computer system
Triggering signal configuration parameter information to select the inside and outside triggering mode of acquisition system, described PCIE stone is fpga chip
The internal IP kernel existed with stone form, is used for realizing PCIE host-host protocol by suitably configuration.
8. the fiber-optic vibration interference signal real-time data acquisition as described in any one in claim 1-7 and transmitting device
Using method, it is characterised in that comprise the following steps:
Step S01, completes the power-up initializing of each functional unit block of harvester；
Step S02, initializes PCIE communication interface, completes the configuration of PCIE communication interface；
Step S03, the configuration information of the acquisition parameter of harvester Receiving Host system hair washing, and complete the relevant of harvester
The configuration of acquisition parameter；
Step S04, ADC acquisition controlling unit starts to receive ADC transducer under triggering the control of signal and acquisition control module
Conversion numerical data and send data to digital signal processing module；
Step S05, digital signal processing module is processed and transmitted to cache module caching to the data received；
Step S06, the acquisition parameter configuration information sent according to main frame determines it is directly by DMA side by the data of cache module
Formula transmission is still transferred in DDR III memorizer to host computer system；
Step S07, harvester configuration has configured DMA channel according to the requirement of host computer system；
Step S08, the data in cache module are stored to DDR III memorizer, all count by DDR III storage control module
After being transmitted, it is already prepared to by MSI interrupt cache module notice host computer system data, prepares to start DMA channel
Transmission；
Step S09, harvester is started DMA channel transmission, the data of harvester is spread out of to main frame system by PCIE interface
System；
Step S10, data end of transmission, harvester sends MSI interrupt signal to host computer system, and notice host computer system data are
Through end of transmission；
Step S11, host computer system is according to gathering needs, and whether notice harvester continues new collection, if continuing to gather, returns
Returning step S04, otherwise exit, harvester enters idle condition.
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Application publication date: 20161207 |