CN105608879A - Transient field signal synchronous acquisition system - Google Patents
Transient field signal synchronous acquisition system Download PDFInfo
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- CN105608879A CN105608879A CN201510741476.5A CN201510741476A CN105608879A CN 105608879 A CN105608879 A CN 105608879A CN 201510741476 A CN201510741476 A CN 201510741476A CN 105608879 A CN105608879 A CN 105608879A
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Abstract
The invention provides a transient field signal synchronous acquisition system. The transient field signal synchronous acquisition system comprises a plurality of sensors, a plurality of LXI conditioning acquisition equipments, a switch, a transmission medium, and a computer; the sensors are used for recording field signals; the LXI conditioning acquisition equipments are connected with the sensors, and are used for conditioning, collecting, and storing signals; the computer is connected with the switch via the transmission medium; and the switch is connected with the LXI conditioning acquisition equipments. The transient field signal synchronous acquisition system is capable of solving a problem of the prior art that signal test success rate of signal synchronous acquisition systems is not high, and avoiding sensor long distance cable laying.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of transient field signal synchronous collection system.
Background technology
In the test of blast, impact, Motion Field, because damage effect is serious to instrument damage, passThe method of testing of system, for extending sensor wire, makes instrument in being safely with and carrying out data acquisition.Because field signal testing sensor is counted more than general 10 road, it is multiple that long cable large area is laid entanglementAssorted, lengthen the testing time, reduce testing efficiency. Meanwhile, long cable causes drift to signal, outstandingWhen its high frequency, distorted signals, decay are seriously.
The sensor array placement area of transient field signal is larger, and signal sampling rate is high, and the sampling time is long,Short time data amount is huge, and the test macro based on buses such as PCI, VXI, PXI mostly is integrated at presentEquipment, portable, flexibility is less compliant in a test environment. LXI bus proposed from 2004Since, be subject to increasing application in field tests. For example Chinese patent " a kind of LXI-PXI/PXIeAdaption system " (patent No. CN103678238A), propose PXI/PXIe module adaptive fastBecome to possess the instrument of LXI basic function and expanded function; Chinese patent is " a kind of based on LXI busThe distribution testing device of framework " (patent No. CN202815819U), LXI bus architecture has been proposed,But do not relate to Large Volume Data real-time Transmission. Due to the particularity of field signal test, should large area clothIf sensor, again to the large capacity synchronous acquisition of signal with show in real time, makes to test success rate not high.
In correlation technique, the problem that signal synchronous collection system is not high to the test success rate of signal,Effective solution is not also proposed.
Summary of the invention
The invention provides a kind of transient field signal synchronous collection system, at least to solve in correlation techniqueThe problem that signal synchronous collection system is not high to the test success rate of signal.
According to an aspect of the present invention, provide a kind of transient field signal synchronous collection system, having comprised:Multiple sensors, many LXI (LANeXtensionforinstrumentation, referred to as LXI)Conditioning Acquisition Instrument, switch, transmission medium and computer; Wherein, described multiple sensor be used for intoPicking up of row field signal; Described many LXI conditioning Acquisition Instrument is connected to described multiple sensor, forSignal is nursed one's health, gathered and stores; Described in described computer is connected to by described transmission mediumSwitch, described switch is connected to described many LXI conditioning Acquisition Instrument.
Alternatively, described LXI conditioning Acquisition Instrument comprises synchronous acquisition module, trigger module, power supply mouldPiece, embedded nucleus module and memory module; Wherein, described synchronous acquisition module and described trigger modePiece, described power module and described flush bonding module are connected, for signal is nursed one's health; Described touchingSend out module for carrying out the transmission of synchronizing signal; Described power module for to described synchronous acquisition module,Described trigger module, described embedded nucleus module and described memory module are powered; Described embeddingFormula nucleus module is connected to described power module, for moving embedded OS; Described storage mouldPiece is connected with described embedded nucleus module, for storing data.
Alternatively, described switch is with the gigabit ethernet switch of IEEE1588 synchronous protocol.
Alternatively, described transmission medium comprise following one of at least: surpass five class Ethernet cables; Six classesEthernet cable; Optical fiber.
Alternatively, described synchronous acquisition module comprises transistor-transistor logic integrated circuit(Transistor-TransistorLogic, referred to as TTL) Trigger Bus, connects by coaxial cableInstrument triggers port.
Alternatively, described synchronous acquisition module comprises LXIM-LVDS (LANeXtensionforInstrumentation) bus, by multiple spot low-voltage differential signal (MultipointLowVoltageDifferentialSignaling, referred to as M-LVDS) connection instrument triggering port.
Alternatively, described memory module comprise following one of at least: solid state hard disc; USB flash disk.
Alternatively, adopt IEEE1588V2.0 agreement to complete between described many LXI conditioning Acquisition InstrumentClock synchronous.
By the present invention, adopt transient field signal synchronous collection system, comprising: multiple sensors, manyPlatform LXI conditioning Acquisition Instrument, switch, transmission medium and computer; Wherein, multiple sensors are used forCarry out picking up of field signal; Many LXI conditioning Acquisition Instruments are connected to multiple sensors, for to signalNurse one's health, gather and store; Computer is connected to switch by transmission medium, and switch connectsPlatform LXI conditioning Acquisition Instrument at the most. Solved in correlation technique, signal synchronous collection system is to signalThe not high problem of test success rate, has avoided sensor long-distance line cable to lay.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application'sPart, schematic description and description of the present invention is used for explaining the present invention, does not form thisBright improper restriction. In the accompanying drawings:
Fig. 1 is according to the structured flowchart of the transient field signal synchronous collection system of the embodiment of the present invention;
Fig. 2 is according to the structured flowchart () of the transient field signal synchronous collection system of the embodiment of the present invention;
Fig. 3 is the 8 road LXI conditioning Acquisition Instrument structured flowcharts according to the embodiment of the present invention;
Fig. 4 is according to embodiment of the present invention 16 road shock-wave field signal acquiring system structure principle chart;
Fig. 5 is the acquisition system structure chart according to the embodiment of the present invention;
Fig. 6 is the Acquisition Instrument structure chart according to the embodiment of the present invention.
Detailed description of the invention
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments. It should be noted that,In the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
It should be noted that the term in description of the present invention and claims and above-mentioned accompanying drawing" first ", " second " etc. are for distinguishing similar object, and needn't be used for describing specific order orPrecedence.
A kind of transient field signal synchronous collection system is provided in the present embodiment, and Fig. 1 is according to thisThe structured flowchart of the transient field signal synchronous collection system of bright embodiment, as shown in Figure 1, transient field letterNumber synchronous comprises: multiple sensors, many LXI conditioning Acquisition Instruments, switch, transmissionMedium and computer; Wherein, multiple sensors are for carrying out picking up of field signal; Many LXI conditioningsAcquisition Instrument is connected to the plurality of sensor, for signal is nursed one's health, gathered and stores; ComputerBe connected to this switch by transmission medium, switch is connected to this many LXI conditioning Acquisition Instruments. AndAdopt IEEE1588V2.0 agreement to complete the clock synchronous between each Acquisition Instrument. Signal is nursed one's healthCan comprise various ways, for example signal amplification, filtering, anti-aliasing processing.
By above-mentioned transient field signal synchronous collection system, Acquisition Instrument is distributed in test site and completes a letterNumber the collection of running simultaneously, real-time storage and demonstration, avoided sensor long-distance line cable lay, separateThe Large Volume Data of having determined cannot be stored and the difficult problem showing in real time.
In an optional embodiment, LXI conditioning Acquisition Instrument comprise synchronous acquisition module, trigger module,Power module, embedded nucleus module and memory module; Wherein, synchronous acquisition module and this trigger modePiece, power module and flush bonding module are connected, for signal is nursed one's health; Trigger module be used for intoThe transmission of line synchronising signal; Power module is used for synchronous acquisition module, trigger module, embedded coreCore module and memory module are powered; Embedded nucleus module is connected to this power module, for fortuneRow embedded OS; Memory module is connected with embedded nucleus module, for storing data.
In an optional embodiment, switch is with the gigabit Ethernet of IEEE1588 synchronous protocolSwitch.
In an optional embodiment, transmission medium can be to surpass five class Ethernet cables, can be alsoSix class Ethernet cables can also be optical fiber.
In an optional embodiment, synchronous acquisition module comprises TTL Trigger Bus, by coaxiallyCable connects instrument and triggers port.
In an optional embodiment, synchronous acquisition module is LXIM-LVDS bus, passes throughM-LVDS connects instrument and triggers port.
In an optional embodiment, memory module can be solid state hard disc, can be also USB flash disk.
For the problems referred to above that exist in correlation technique, say below in conjunction with concrete optional embodimentBright, following optional embodiment combines above-mentioned optional embodiment and optional embodiment thereof.
This optional embodiment is a kind of transient field signal synchronous collection hardware system, as shown in Figure 2, mainComprise sensor, 8 road LXI conditioning Acquisition Instruments, Ethernet switch, transmission medium and master control meterCalculate. In order to apply under harsh and unforgiving environments, design the portable casing of special robust sealed, adoptHigh strength aluminium numerical control cutting processes, and has ensured that the intensity of system has alleviated again instruments weight; InPortion's circuit module adopts hard connection, and multi-point is fixed; The heater members of circuit board adopts fin conductiveTo shell, shell adopts thorn chip architecture from heat radiation. Whole instrument volume is little, lightweight, heat dispersionGood, be easy to carry.
Multiple sensors complete field signal according to test request forming array and pick up; Sensor signal is through letterNumber cable transmission to 8 road LXI conditioning Acquisition Instrument, Acquisition Instrument carries out cascade by Trigger Bus, to letterAfter number conditioning, parallel acquisition is stored, and the data upload of compression is to main control computer simultaneously; Master control meterCalculation machine forms test LAN by Ethernet switch and 8 road LXI conditioning Acquisition Instrument, and adoptsIEEE1588V2.0 agreement completes the clock synchronous between each Acquisition Instrument.
Fig. 3 is the 8 road LXI conditioning Acquisition Instrument structured flowcharts according to the embodiment of the present invention, above-mentioned 8 tunnelsLXI conditioning Acquisition Instrument as shown in Figure 3, mainly comprise 8 Channel Synchronous acquisition modules, trigger module,Power module, embedded nucleus module and memory module;
8 Channel Synchronous acquisition modules, for the conditioning of 8 road signals, comprise signal amplification, filtering, anti-Aliasing processing; Be connected with trigger module and realize the collection of running simultaneously, the premenstrual panel terminal port of signal transfers to8 Channel Synchronous acquisition modules, the conditioning of settling signal, according to trigger module information, judge whether intoThe storage of row data;
Trigger module is for the triggering synchronous of 8 road LXI conditioning Acquisition Instruments, by TTL bus orEach Acquisition Instrument of M-LVDS bus cascade, completes synchronous transmission of signal;
Power module is for the power supply of modules, provide ± 12V, ± 5V and ± dc source of 3V;
Embedded nucleus module is used for moving built-in Linux operating system, carries out LXI regulation and stipulationService, communication 8 road synchronous acquisition modules and and to memory module operation, carry out data processing and depositStorage;
Memory module is for jumbo data storage.
Fig. 4 is according to embodiment of the present invention 16 road shock-wave field signal acquiring system structure principle chart,The main You16 of this system road sensor, 28 road LXI conditioning Acquisition Instruments, 1 Ethernet switchWell, 16 class Ethernet cable and 1 main control computer form. Sensor wire length is 30Rice, 6 60 meters of class Ethernet cable length, 28 road LXI conditioning Acquisition Instruments are distributed in test site.
Fig. 5 is the acquisition system structure chart according to the embodiment of the present invention, as shown in Figure 5, and acquisition systemMainly formed by sensor, LXI conditioning Acquisition Instrument, gigabit ethernet switch and main control computer.Air pressure fluctuation is converted into ultra-weak electronic signal by sensor; LXI conditioning Acquisition Instrument is to ultra-weak electronic signalNurse one's health (filtering, amplification and denoising), the signal after conditioning is shunted two places, and the first place depositsIn the hard disk of storage in Acquisition Instrument, the second place after algorithm process directly through uploading to computer; SwitchBuild the transmission of the complete field data stream of LAN; Computer completes the control to LXI conditioning Acquisition Instrument, and connectsBe subject to data display waveform.
Every LXI conditioning Acquisition Instrument can gather 8 channel signals, and 4 Acquisition Instruments complete 32 road letters altogetherNumber collection. In gatherer process, computer Real Time Display Algorithm Wave data after treatment, gathers and finishesAfter can according to actual conditions determine whether total data is uploaded.
Fig. 6 is the Acquisition Instrument structure chart according to the embodiment of the present invention, as shown in Figure 6, and Acquisition Instrument structureMain point four parts: conditioning collection plate, embedded processing plate, power supply and casing.
Conditioning collection plate mainly comprise the collection of sensor adaptation, signal amplification, signal filtering, AD,The formations such as FPGA controller and data caching circuit, complete sensor excitation, small-signal amplify,The function such as hardware filtering and data buffer storage.
Embedded processing plate mainly comprises internal bus administrative unit, triggers administrative unit, data storageUnit, data processing unit and interface management unit etc., complete data storage, data algorithm process,IEEE1588 is synchronous, the management of LXI agreement and triggering.
Can provide+3.3V of power module ,+5V and ± 12V power good signal.
Signal stream is processed:
The parallel data of 8 tunnel sensor signals after the conditioning of conditioning collection plate claims original data stream, originalData flow to embedded processing plate, is shunted two places through PXI bus transfer herein, and the first place passes throughDma mode is directly stored in hard disk, and second is in the process that is stored in hard disk, to data flowSegment processing, parses by algorithm (10 times down-sampled or small echo etc.) that to compare initial data lessData, directly upload to computer.
Waveform correspondence is uploaded:
In gatherer process, the data of arithmetic analysis show on computers in real time, the real-time number of computer storageAccording to, after end to be tested, select initial data to intercept and upload according to real-time waveform.
Total data is uploaded:
After the complete test of collection finishes, the initial data of this test is all uploaded to computer.
In sum, the present invention relates to a kind of transient field signal synchronous collection hardware system, especially applicableIn the distributed synchronization test of blast, impact, Motion Field. System is mainly by sensor, 8 road LXIConditioning Acquisition Instrument, Ethernet switch, transmission medium and main control computer form, and Acquisition Instrument is distributed inTest site completes the collection of running simultaneously, real-time storage and the demonstration of field signal, has avoided sensor longApart from cable laying, solve the difficult problem that Large Volume Data cannot be stored and show in real time.
Obviously, it is apparent to those skilled in the art that above-mentioned of the present invention each module or each stepCan realize with general calculation element, they can concentrate on single calculation element, orBe distributed on the network that multiple calculation elements form, alternatively, they can be held with calculation elementThe program code of row is realized, thereby, they can be stored in storage device to be come by calculation elementCarry out, and in some cases, can carry out shown or described with the order being different from hereinStep, or they are made into respectively to each integrated circuit modules, or by the multiple moulds in themPiece or step are made into single integrated circuit module and realize. Like this, the present invention is not restricted to any spyFixed hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, forThose skilled in the art, the present invention can have various modifications and variations. All in essence of the present inventionWithin god and principle, any amendment of doing, be equal to replacement, improvement etc., all should be included in the present inventionProtection domain within.
Claims (8)
1. a transient field signal synchronous collection system, is characterized in that, comprising: multiple sensors, manyPlatform LXI conditioning Acquisition Instrument, switch, transmission medium and computer; Wherein, described multiple biographySensor is for carrying out picking up of field signal; Described many LXI conditioning Acquisition Instrument is connected to described manyIndividual sensor, for nursing one's health, gather and store signal; Described in described computer passes throughTransmission medium is connected to described switch, and described switch is connected to described many LXI conditioning and adoptsCollection instrument.
2. system according to claim 1, is characterized in that, described LXI conditioning Acquisition Instrument comprisesSynchronous acquisition module, trigger module, power module, embedded nucleus module and memory module;Wherein, described synchronous acquisition module and described trigger module, described power module and described embeddingFormula module connects, for signal is nursed one's health; Described trigger module is used for carrying out synchronizing signalTransmission; Described power module is used for described synchronous acquisition module, described trigger module, instituteState embedded nucleus module and described memory module is powered; Described embedded nucleus module connectsBe connected to described power module, for moving embedded OS; Described memory module with described inEmbedded nucleus module connects, for storing data.
3. system according to claim 1, is characterized in that, described switch is with IEEE1588The gigabit ethernet switch of synchronous protocol.
4. system according to claim 1, is characterized in that, described transmission medium comprise with down toOne of few:
Surpass five class Ethernet cables;
Six class Ethernet cables;
Optical fiber.
5. system according to claim 2, is characterized in that, described synchronous acquisition module comprisesTTL Trigger Bus, connects instrument by coaxial cable and triggers port.
6. system according to claim 2, is characterized in that, described synchronous acquisition module comprisesLXIM-LVDS bus, connects instrument by M-LVDS and triggers port.
7. system according to claim 2, is characterized in that, described memory module comprise with down toOne of few:
Solid state hard disc;
USB flash disk.
8. according to the system described in any one in claim 1 to 7, it is characterized in that, adoptIEEE1588V2.0 agreement completes the clock synchronous between described many LXI conditioning Acquisition Instrument.
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Cited By (1)
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