CN110428602A - A kind of electromagnetic field Phototube Coupling system based on FPGA - Google Patents
A kind of electromagnetic field Phototube Coupling system based on FPGA Download PDFInfo
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- CN110428602A CN110428602A CN201910671578.2A CN201910671578A CN110428602A CN 110428602 A CN110428602 A CN 110428602A CN 201910671578 A CN201910671578 A CN 201910671578A CN 110428602 A CN110428602 A CN 110428602A
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- electromagnetic field
- fpga
- coupling system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0878—Sensors; antennas; probes; detectors
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/06—Non-electrical signal transmission systems, e.g. optical systems through light guides, e.g. optical fibres
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
A kind of electromagnetic field Phototube Coupling system based on FPGA disclosed by the invention includes sequentially connected electromagnetic field signal acquisition module, signal conditioning module, A/D conversion module, transmitting terminal FPGA module, optical transmission module, light receiving module, receiving end FPGA module, D/A conversion module and module is locally displayed.Electromagnetic field Phototube Coupling system of the invention, solves the problems, such as that data are low vulnerable to electromagnetic interference and efficiency of transmission in long-distance transmission line.
Description
Technical field
The invention belongs to electromagnetic field signal monitoring technical fields, and in particular to a kind of electromagnetic field Phototube Coupling based on FPGA
System.
Background technique
As electromagnetic environment problem has been to be concerned by more and more people, precise measurement transmission line of electricity generate electromagnetic field and
Assessing it and doing great damage to the work of electric system and electrical equipment becomes a major issue with disturbed condition, therefore,
In the research fields such as the research of electromagnetic pulse environmental characteristics, the evaluation of electromagnetic protection performance and electromagnetic protection method, pulse electricity
The measuring technique in magnetic field is received significant attention and is furtherd investigate.
The measurement request sensor response band of pulse electromagnetic field is wide, dynamic range is big, and measurement method is direct with antenna
Based on actinobolia, transient electric field or magnetic field signal are directly acquired by broad-band antenna, handled using cable and integral etc. to obtain
To Wave data.
Traditional electrical measurement technology is using the electricity such as electromagnetic probe and diode detector probe, very due to electricity probe
It is easy to reach saturation in forceful electric power magnetic environment, so needing to carry out signal just measure after greatly decaying, but decay
Coefficient still can not be measured accurately, and be difficult to measure the peak power of strong electromagnetic pulse always；In addition, forceful electric power magnetic signal can be to electricity
It learns measuring system to interfere while the uncertain of measuring results being caused to increase, or even can not work, it also can be to tested
Electromagnetic field generates interference.
With the further investigation to electromagnetic pulse and High-Power Microwave technology, develop corresponding testing and diagnosing technology, especially
It is to design and produce that broadband, passive, small size, anti-electromagnetic interference capability be strong, pulse electromagnetic field measurement of Larger Dynamic range
System seems especially urgent.
Summary of the invention
The electromagnetic field Phototube Coupling system based on FPGA that the object of the present invention is to provide a kind of, solves data remote
The problem low vulnerable to electromagnetic interference and efficiency of transmission in transmission line.
The technical scheme adopted by the invention is that a kind of electromagnetic field Phototube Coupling system based on FPGA, includes successively
The electromagnetic field signal acquisition module of connection, signal conditioning module, A/D conversion module, transmitting terminal FPGA module, optical transmission module,
Light receiving module, receiving end FPGA module, D/A conversion module and module is locally displayed.
It is of the invention to be further characterized in that,
Electromagnetic field signal acquisition module includes the electric field probe and magnet field probe connecting respectively with signal conditioning module.
Signal conditioning module includes concatenated amplifier and filter, electric field probe and magnet field probe respectively with amplifier
Connection, filter are connect with A/D conversion module.
The model SFE1G of electric field probe, the model SFM2G of magnet field probe, the model ATA5510 of amplifier, filter
Wave device uses the active filter of model UAF42.
Optical transmission module is connected with light receiving module by optical fiber, and optical fiber interface is LC type.
A/D conversion module uses 12 high-speed transitions chip AD9226.
Transmitting terminal FPGA module and receiving end FPGA module select the XC7A100T chip of ARTIX-7 series.
The model of optical transmission module and light receiving module is XAS85-192-M3.
D/A conversion module uses 14 high-speed transitions chip AN9767.
It is oscillograph that module, which is locally displayed,.
The beneficial effects of the present invention are:
(1) a kind of electromagnetic field Phototube Coupling system based on FPGA of the present invention, isolation is good, strong interference immunity, real-time
It is good, by A/D conversion module, multi-channel high-speed signal acquisition, storage and the Transmission system of FPGA, Fibre Optical Communication Technology and D/A
Conversion module realizes detection and transmission to electromagnetic field signal, not only increases the accuracy and quickly of electromagnetic field signal acquisition
Property, also using optical fiber interface high bandwidth, the bit error rate is low, connection type is simple, transmission process strong interference immunity the advantages that, greatly
Improve the reliability and security in electromagnetic field signal transmission process.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of electromagnetic field Phototube Coupling system based on FPGA of the invention；
Fig. 2 is the connected development board partial structure diagram of electromagnetic field Phototube Coupling system transmitting terminal A/D of the invention；
Fig. 3 is the connected development board partial structure diagram of electromagnetic field Phototube Coupling system receiving terminal D/A of the invention.
In figure, 1. electromagnetic field signal acquisition modules, 2. signal conditioning modules, 3.A/D conversion module, 4. transmitting terminal FPGA moulds
Block, 5. optical transmission modules, 6. smooth receiving modules, 7. receiving end FPGA modules, 8.D/A conversion module, 9. are locally displayed module；
1-1. electric field probe, 1-2. magnet field probe；
2-1. amplifier, 2-2. filter；
The core board of 4-1. transmitting terminal FPGA module；
7-1. the core board of receiving end FPGA module.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
The present invention provides a kind of electromagnetic field Phototube Coupling system based on FPGA, as shown in Figure 1-3, include to be sequentially connected
Electromagnetic field signal acquisition module 1, signal conditioning module 2, A/D conversion module 3, transmitting terminal FPGA module 4, optical transmission module 5,
Light receiving module 6, receiving end FPGA module 7, D/A conversion module 8 and module 9 is locally displayed；
Electromagnetic field signal acquisition module 1 includes that the electric field probe 1-1 connecting respectively with signal conditioning module 2 and magnetic field are visited
Head 1-2, the model SFE1G of electric field probe 1-1, the model SFM2G of magnet field probe；
Signal conditioning module 2 includes concatenated amplifier 2-1 and filter module 2-2, electric field probe 1-1 and magnet field probe
1-2 is connect with amplifier 2-1 respectively, and filter 2-2 is connect with A/D conversion module 3.
The model ATA5510 of amplifier 2-1, filter use the active filter of model UAF42.
Electromagnetic field signal acquisition module 1 is by collected electromagnetic field analog signal through signal conditioning module 2, A/D modulus of conversion
Block 3 is connected to the input terminal of transmitting terminal FPGA module 4, specifically: the collected electric field signal of electric field probe 1-1 and magnet field probe
The collected magnetic field signal of 1-2 passes sequentially through amplifier 2-1 respectively and filter 2-2, A/D conversion module 3 is connected to transmitting terminal
The input terminal of FPGA module 4.
Transmitting terminal FPGA module 4 carries the four serial high-speed transceiver channels tunnel high speed GTP and is connected with optical transmission module 5,
Optical transmission module 5 is connected by optical fiber with light receiving module 6, and light receiving module 6 also connect with receiving end FPGA module 7, connects
Receiving end FPGA module 7 is connected with D/A conversion module 8, and D/A conversion module 8 is connected by interface with module 9 is locally displayed.
A/D conversion module 3 uses 12 high-speed transitions chip AD9226, which can achieve
65MSPS。
Transmitting terminal FPGA module 4 and receiving end FPGA module 7 select the XC7A100T of XILINX company ARTIX-7 series
Chip, carries the four serial high-speed transceiver channels tunnel high speed GTP, the transmitting-receiving speed in every channel be 500Mb/s to 6.6Gb/s it
Between, GTP transceiver supports different serial transmission interface or agreement, it is by four transceiver channel GTPE2_CHANNEL and one
A GTPE2_COMMON composition, every road GTPE2_CHANNEL include transmitting line TX and reception circuit RX, GTPE2_CHANNEL
Transmitting terminal and receiving end function be it is independent, be made of two sublayers of PMA and PCS, wherein PMA sublayer include high speed string simultaneously
The circuits such as conversion (Serdes), clock generator and clock recovery, PCS sublayer include 8B/10B encoding and decoding, buffer area and clock
The circuits such as amendment.
The model of optical transmission module 5 and light receiving module 6 is XAS85-192-M3, and data transmission rate is up to
11.3Gbps, optical transmission module 5 are connected with light receiving module 6 by optical fiber, and optical fiber interface is LC type.
D/A conversion module 8 uses 14 high-speed transitions chip AN9767, which supports the sampling speed of 125MSPS
Rate.
It is oscillograph that module 9, which is locally displayed,.
Electromagnetic field signal acquisition module 1 is that the electromagnetic field signal around route is detected and adopted using emf probe
Collection.
Signal conditioning module 2 is that the electromagnetic field signal come to acquisition is handled, by the circuits such as amplifying, filtering to electromagnetism
The interference signal that field signal is mingled with is handled, while the electromagnetic field signal of acquisition also being made to meet the input of A/D conversion module 3
Range.
The analog signal received is converted to digital signal in a manner of 12 parallel-by-bits and is sent to by A/D conversion module 3
Sending end FPGA module 4, transmitting terminal FPGA module 4 are that A/D conversion module 3 provides the acquisition clock of its needs.
Transmitting terminal FPGA module 4 sends 16 parallel-by-bit analog signal datas after 8B/10B is encoded, by 16 parallel-by-bit numbers
It is encoded according to two 8 data are divided into, the data after coding are 20, and into a transmission buffer area, the buffer area is main
It is the clock isolation of two clock domains of PMA sublayer and PCS sublayer, solves the problems, such as the matching of the two clock rate and phase difference,
Finally carrying out parallel-serial conversion by high speed Serdes is serial data stream, and is connected in a manner of differential signal by capacitance
Optical transmission module 5.
Optical transmission module 5 receives serial data, carries out electro-optic conversion, is transferred to light in the form of light by optical fiber and receives mould
Block 6.For light receiving module 6 using double LC interfaces, rate can achieve 11.3Gbps, and 300m, operation temperature may be implemented in transmission range
Degree range is big, and practical value is very wide.
Light receiving module 6 receives the optical signal transmitted by optical fiber, carries out photoelectric conversion and the side with differential signal
Formula is sent to receiving end FPGA module 7.
Receiving end FPGA module 7 receives 20 bit-serial data streams in a manner of differential signal, is gone here and there by high speed Serdes
And convert, it into buffer area is received, is decoded using 10B/8B, data is transmitted to D/A conversion module 8 in a parallel fashion.
D/A conversion module 8 receives 12 bit parallel datas, completes digital-to-analogue conversion, obtains original analog, be sent to local
Display module 9 is shown.
Module 9 is locally displayed can realize the display of waveform using oscillograph.
As shown in Fig. 2, A/D conversion module 3 is connected to transmitting terminal FPGA module 4 by the extension mouth of 40 needle 2.54mm spacing
Core board 4-1.
Two are provided on the core board 4-1 of transmitting terminal FPGA module 4 and the core board 7-1 of receiving end FPGA module 7
The active differential crystal oscillator of Sitime company, one is 200MHz, model SiT9102-200.00MHz, the system for FPGA
Master clock；Another is 125MHz, and reference clock of the model SiT9102-125MHz for GTP transceiver is defeated, differential reference
Clock is converted into single-ended clock signal and enters in the PLL0 and PLL1 of GTPE2_COMMOM, generates needed for TX and RX circuit
Clock frequency.If TX with RX transceiver speed is identical, the clock that the same PLL is generated is can be used in TX circuit and RX circuit,
If TX and RX transceiver speed is different, the clock generated using different pll clocks is needed.ARTIX-7FPGA's
4 road high-speed transceivers of GTP transceiver are connected to 4 optical transmission modules 5 or 4 light receiving modules 6, realize the light of 4 tunnel high speeds
Fiber communication interface.
Transmitting terminal FPGA module 4 is mainly completed the control of A/D conversion module 3, the control of optical transmission module 5 respectively and is gone here and there
The functions such as conversion and control, clock division and data processing；
As shown in figure 3, D/A conversion module 8 is connected to receiving end FPGA module 7 by the extension mouth of 40 needle 2.54mm spacing
Core board 4-1.
Receiving terminal FPGA module 7 is main respectively to complete the control of D/A module 8, the control of optical receiver module 6, serioparallel exchange
The functions such as control, clock division and data processing.
Advantages of the present invention are as follows:
(1) method that electromagnetic field Phototube Coupling system of the invention is transmitted based on emf sensor and optical fiber is by electric signal
It is converted into optical signal, is restored as electric signal, this transmission mode isolation voltage with higher, strong antijamming capability, communication
The features such as capacity is big, transmission loss is small；
(2) electromagnetic field Phototube Coupling system of the invention is used as data using high-performance FPGA (field programmable gate array)
The main control chip of capture card, the advantages such as its sharp concurrency and the I/O interface abundant for supporting more level are realized to four railway digital amounts
The synchronous data collection and Subdividing Processing of signal are acquired and are reserved using parallel interface to the analog-to-digital conversion module in eight channels
General purpose I/O Interface facilitates the extension of system, while optical fiber transport protocol is utilized and enhances reliability.Using optical fiber as data
The prevailing transmission of transmission is by way of solving data and ask in long-distance transmission line vulnerable to electromagnetic interference and efficiency of transmission are low
Topic.By D/A converter module reduction and simulation signal, the detection to electromagnetic field signal is realized；
(3) electromagnetic field Phototube Coupling system of the invention, may be implemented to the pulse in complex environment or in the confined space
The measurement of electromagnetic field progress undisturbed, high-fidelity；Compared to traditional electrical measurement means, had using optical fiber measurement technology anti-
The features such as electromagnetic interference capability is strong, long transmission distance, measurement sensitivity are high, dynamic range is big, can be real to strong electromagnetic pulse signal
Existing real-time online measuring, technical advantage is obvious, has broad application prospects.
Claims (10)
1. a kind of electromagnetic field Phototube Coupling system based on FPGA, which is characterized in that include sequentially connected electromagnetic field signal
Acquisition module (1), signal conditioning module (2), A/D conversion module (3), transmitting terminal FPGA module (4), optical transmission module (5), light
It receiving module (6), receiving end FPGA module (7), D/A conversion module (8) and is locally displayed module (9).
2. a kind of electromagnetic field Phototube Coupling system based on FPGA according to claim 1, which is characterized in that the electromagnetism
Field signal acquisition module (1) includes the electric field probe (1-1) and magnet field probe (1- connecting respectively with signal conditioning module (2)
2)。
3. a kind of electromagnetic field Phototube Coupling system based on FPGA according to claim 2, which is characterized in that the signal
Conditioning module (2) includes concatenated amplifier (2-1) and filter (2-2), and the electric field probe (1-1) and the magnetic field are visited
Head (1-2) is connect with amplifier (2-1) respectively, and the filter (2-2) connect with A/D conversion module (3).
4. a kind of electromagnetic field Phototube Coupling system based on FPGA according to claim 3, which is characterized in that the electric field
The model SFE1G of probe (1-1), the model SFM2G of the magnet field probe, the model of the amplifier (2-1)
ATA5510, the filter (2-2) use the active filter of model UAF42.
5. a kind of electromagnetic field Phototube Coupling system based on FPGA according to claim 1, which is characterized in that the light hair
Module (5) is sent to connect with light receiving module (6) by optical fiber, optical fiber interface is LC type.
6. a kind of electromagnetic field Phototube Coupling system based on FPGA according to claim 1, which is characterized in that the A/D
Conversion module (3) uses 12 high-speed transitions chip AD9226.
7. a kind of electromagnetic field Phototube Coupling system based on FPGA according to claim 1, which is characterized in that the transmission
End FPGA module (4) and the receiving end FPGA module (7) select the XC7A100T chip of ARTIX-7 series.
8. a kind of electromagnetic field Phototube Coupling system based on FPGA according to claim 1, which is characterized in that the light hair
Sending the model of module (5) and the smooth receiving module (6) is XAS85-192-M3.
9. a kind of electromagnetic field Phototube Coupling system based on FPGA according to claim 1, the D/A conversion module (8)
Using 14 high-speed transitions chip AN9767.
10. a kind of electromagnetic field Phototube Coupling system based on FPGA according to claim 1, which is characterized in that described
Ground display module (9) is oscillograph.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110995625A (en) * | 2019-12-06 | 2020-04-10 | 盛科网络（苏州）有限公司 | Verification system and verification method of Ethernet interface chip |
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| JPH10276248A (en) * | 1997-03-28 | 1998-10-13 | Ando Electric Co Ltd | Optical fiber telephone set |
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