CN205748484U - A kind of multichannel data acquisition system based on FPGA - Google Patents
A kind of multichannel data acquisition system based on FPGA Download PDFInfo
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- CN205748484U CN205748484U CN201620643041.7U CN201620643041U CN205748484U CN 205748484 U CN205748484 U CN 205748484U CN 201620643041 U CN201620643041 U CN 201620643041U CN 205748484 U CN205748484 U CN 205748484U
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Abstract
The utility model discloses a kind of multichannel data acquisition system based on FPGA, including a sensor group, one I V change-over circuit, one magnifier, one or eight way switch modules, a filter circuit, an analog-to-digital conversion module, one FPGA control module, a serial communication module and a level conversion bus transceiver;For analogue signal, system is passed through signal conditioning circuit, various analogue signals is converted to 0 5V DC voltage, and this voltage is carried out analog digital conversion by analog to digital conversion circuit, and the magnitude of voltage digital quantity of acquisition is sent to FPGA process;For pulse signal, system passes through signal conditioning circuit, by level conversion operation, various pulse signals is converted to digital signal and exports to being analyzed in FPGA processing.This utility model can have low cost to realize the collection to multi-signal forms such as current signal, voltage signal, low frequency microvolt voltage signals, simple to operate, and the advantages such as processing speed is fast can be widely applied to scientific experiment place and industrial site.
Description
Technical field
This utility model relates to industrial data monitoring technical field, more particularly, to a kind of multichannel based on FPGA
Data collecting system.
Background technology
Recently as computer technology level and the fast development of science power, whether in scientific research place, extensive
Among industry spot or national defense construction, the digital display circuit of modernization has obtained increasingly extensive application, to various electronic signals
Data acquisition have become as the key technology realizing digital display circuit.
Most of data collecting cards of equal cost in the market, often for the factor such as cost and market, gather letter
Number kind of interface less;Meanwhile, at some, measurement performance is required higher place, the data acquisition of domestic unit independent research
Collecting system performance is slightly worse, there is also certain gap, sampling rate, all Shortcomings, the sample rate such as sampling precision compared with abroad
General all at several below GSPS, bandwidth is less than 200MHz, and digital to analog converter figure place mostly is less than 12;Finally, the most domestic
Acquisition system universal functionality is the most single, and port number and kind of interface are less, and range of application is less.
Utility model content
For problems of the prior art, the purpose of this utility model is that design provides a kind of many based on FPGA
Channel data acquisition system, solves data collecting system universal functionality the most single, and port number and kind of interface are less, applies model
Enclose the technical problems such as less.
For solving above-mentioned purpose, this utility model provides a kind of multichannel data acquisition system based on FPGA, including
One sensor group, an I-V change-over circuit, a magnifier, one or eight way switch modules, a filter circuit, an analog digital conversion
Module, a FPGA control module, a serial communication module and a level conversion bus transceiver, wherein: described sensor group will
Current signal exports to described I-V change-over circuit;Low frequency microvolt voltage signal is exported and puts to described instrument by described sensor group
Big circuit;The current signal of storage is converted to voltage signal and exports to described eight way switch modules by described I-V change-over circuit;Institute
State magnifier be amplified by the low frequency microvolt voltage signal of storage and export to described eight way switch modules;Described eight
The voltage signal of storage is exported to described filter circuit by way switch module;The voltage signal of storage is carried out by described filter circuit
Filter and export to described analog-to-digital conversion module;Described analog-to-digital conversion module voltage signal is converted to digital signal output to
Described FPGA control module;The digital signal of acquisition is analyzed and processed and is transferred to described serial and leads to by described FPGA control module
News module.
Compared with prior art, this utility model has the advantages that multi-channel data acquisition system based on FPGA
System comprises voltage signal, current signal, low frequency microvolt signal (mV level), grating pulse signal, normal pulsed signal, Start/
The multiple input signal interfaces such as Stop signal, system interface type is abundanter, can complete pressure transducer in laboratory, weigh
The multiple sensors such as sensor, flow transducer, grating sensor, magneto strictive sensor, temperature sensor, speed probe
Measurement;While keeping lower cost, cover the analog signal form that most industry is on-the-spot, except can be applicable to section
Grind the signals collecting in field, more can extensively apply the data monitoring in industrial and agricultural production, at the data in industrial stokehold
Reason, or even entertainment life, the more areas such as domestic electronic, there is important actual application value and meaning.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments the utility model is further explained explanation.
Fig. 1 is overall structure schematic diagram of the present utility model;
Description of reference numerals: 1 sensor group;2 I-V change-over circuits;3 magnifiers;4 eight way switch moulds
Block;5 filter circuits;6 analog-to-digital conversion modules;7 FPGA control modules;8 serial communication modules;9 level conversion are total
Line transceiver.
Detailed description of the invention
Being described in detail this utility model below in conjunction with the accompanying drawings, the description of this part is only exemplary and explanatory,
Protection domain of the present utility model should there be is not any restriction effect.In conjunction with figure below, this utility model is made furtherly
Bright.
Fig. 1, a kind of based on FPGA multichannel data acquisition system that this utility model provides, including a sensor group 1,
One I-V change-over circuit 2, magnifier 3, a 1 way switch module 4, a filter circuit 5, an analog-to-digital conversion module 6, one
FPGA control module 7, serial communication module 8 and a level conversion bus transceiver 9;Sensor group 1 is electric with I-V conversion respectively
Road 2, magnifier 3, eight way switch module 4, level conversion bus transceiver 9 are connected, and I-V change-over circuit 2 is opened with eight tunnels
Closing module 4 to be connected, magnifier 3 is connected with eight way switch modules 4, and eight way switch modules 4 are connected with filter circuit 5, filter
Wave circuit 5 is connected with analog-to-digital conversion module 6, and analog-to-digital conversion module 6 is connected with FPGA control module 7, FPGA control module 7 and string
Row communication module 8 is connected, and level conversion bus transceiver 9 is connected with FPGA control module 7.
Sensor group 1 includes current signal output type sensor, low frequency microvolt signal output type sensor and digit pulse
Signal output type sensor: wherein current signal output type sensor includes pressure transducer, SCFT turbine flowmeter and SCT temperature
Degree sensor;Low frequency microvolt signal output type sensor includes that BSS LOAD CELLS, CR LOAD CELLS, CXH bellows are weighed biography
Sensor;Digital pulse signal output type sensor includes grating displacement sensor, magnetostrictive displacement sensor and photoelectric coding
Device;Current signal, voltage signal, low frequency microvolt voltage signal are exported and open to I-V change-over circuit 2, eight tunnel by sensor group 1 respectively
Closing module 4, magnifier 3, sensor group 1 also can be by output of pulse signal to level conversion bus transceiver 9 simultaneously.
I-V change-over circuit 2 is the output voltage being converted to the electric current of current source be proportional to;I-V change-over circuit 2 will
The current signal of input is converted to voltage signal and exports to eight way switch modules 4.
Magnifier 3 is a kind of precision differential voltage amplifier circuit, has the list of Differential Input and relative reference edge
End output;The low frequency microvolt voltage signal of storage is amplified and exports to eight way switch modules 4 by magnifier 3.
Eight way switch modules 4 are single 8 digital control simulant electronic switches of passage, have the lowest conduction impedance and cut-off leakage
Electric current, has extremely low quiescent dissipation in whole power range, and in the case of 10V power voltage supply, switching time is only
For 160ns, fully meet the time demand of switch Guan Bi switching at a high speed during circulating sampling;Eight way switch modules 4 will be deposited
The voltage signal of storage exports to filter circuit 5.
Filter circuit 5 is the alternating component in the DC voltage reducing pulsation, retains its flip-flop, makes output voltage stricture of vagina
Wave system number reduces, and waveform becomes smoother;The voltage signal of storage is filtered and exports to analog digital conversion by filter circuit 5
Module 6.
Analog-to-digital conversion module 6 is the circuit converting analog signals into digital signal, referred to as AD conversion, the work of AD conversion
With being that Time Continuous, amplitude also continuous print analog quantity are converted to the digital signal that time discrete, amplitude are the most discrete;Analog digital conversion
Voltage signal is converted to digital signal and exports to FPGA control module 7 by module 6.
The pulse signal of the various ways from different sensors is passed through level conversion by level conversion bus transceiver 9
Mode, is converted to digital signal and is transferred to FPGA control module 7.
The digital signal of acquisition is analyzed and processed and is transferred to serial communication module 8 by FPGA control module 7;It forms knot
Structure and operation principle belong to prior art, do not repeat them here.
Serial communication module 8 is to allow data sequentially transfer one by one, and serial line interface feature is that communication line is simple, only
Want a pair transmission line just can realize two-way communication;Serial communication module 8 uses MAX232 chip to be made by level conversion
The digital signal of FPGA control module 7 and the data of host computer, command interaction.
A kind of based on intelligent electric meter the energy consumption data that this utility model provides is analyzed system and is comprised the following steps:
Sensor group 1 current signal, voltage signal, low frequency microvolt voltage signal are exported respectively to I-V change-over circuit 2,
Eight way switch modules 4, magnifier 3, output of pulse signal also can be received and dispatched by sensor group 1 to level conversion bus simultaneously
Device 9, the current signal of storage is converted to voltage signal and exports to eight way switch modules 4 by I-V change-over circuit 2, and instrument amplifies electricity
The low frequency microvolt voltage signal of storage is amplified and exports to eight way switch modules 4 by road 3, and eight way switch modules 4 will storage
Voltage signal export to filter circuit 5, the voltage signal of storage is filtered and exports to analog digital conversion mould by filter circuit 5
Block 6, voltage signal is converted to digital signal and exports to FPGA control module 7 by analog-to-digital conversion module 6, and level conversion bus is received
Sending out device 9 by level conversion, the pulse signal of acquisition is obtained digital signal and exports to FPGA control module 7, FPGA controls mould
The digital signal of acquisition is analyzed and processed and is transferred to serial communication module 8 and realizes the data with host computer, order with this by block 7
Alternately.
The above, be only preferred embodiment of the present utility model, not make technical scope of the present utility model
Go out any restriction, thus every according to technical spirit of the present utility model, above example is made any trickle amendment, equivalent
Change and modification, in the range of all still falling within the technical solution of the utility model.
Claims (6)
1. a multichannel data acquisition system based on FPGA, it is characterised in that include a sensor group, an I-V conversion electricity
Road, a magnifier, one or eight way switch modules, a filter circuit, an analog-to-digital conversion module, a FPGA control module, one
Serial communication module and a level conversion bus transceiver, wherein: current signal is exported and turns to described I-V by described sensor group
Change circuit;Low frequency microvolt voltage signal is exported to described magnifier by described sensor group;Described I-V change-over circuit will
The current signal of storage is converted to voltage signal and exports to described eight way switch modules;Described magnifier is low by storage
Frequently microvolt voltage signal is amplified and exports to described eight way switch modules;Described eight way switch modules are by the voltage letter of storage
Number output to described filter circuit;The voltage signal of storage is filtered and exports to described analog digital conversion by described filter circuit
Module;Voltage signal is converted to digital signal and exports to described FPGA control module by described analog-to-digital conversion module;Described
The digital signal of acquisition is analyzed and processed and is transferred to described serial communication module by FPGA control module.
2. multichannel data acquisition system as claimed in claim 1, it is characterised in that voltage signal is passed by described sensor group
It is defeated by described eight way switch modules.
3. multichannel data acquisition system as claimed in claim 1, it is characterised in that pulse signal is passed by described sensor group
It is defeated by described level conversion bus transceiver.
4. multichannel data acquisition system as claimed in claim 1, it is characterised in that described level conversion bus transceiver will
The pulse signal obtained obtains digital signal by level conversion and is transferred to described FPGA control module.
5. multichannel data acquisition system as claimed in claim 1, it is characterised in that described filter circuit uses step low-pass
Voltage is filtered by filter circuit.
6. multichannel data acquisition system as claimed in claim 1, it is characterised in that described serial communication module uses
MAX232 chip realizes level conversion, is completed the data of described FPGA control module and host computer by described serial communication module
And command interaction.
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107167651A (en) * | 2017-06-19 | 2017-09-15 | 西北大学 | A kind of voltage signal acquisition system and method |
CN109324308A (en) * | 2018-11-20 | 2019-02-12 | 中国电力科学研究院有限公司 | A kind of automatic calibration of electric energy meter system multifunctional detector test method and device |
CN109753474A (en) * | 2018-12-27 | 2019-05-14 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | Adaptive-filtering universal data collecting system based on labview |
CN114003546A (en) * | 2022-01-04 | 2022-02-01 | 之江实验室 | Multi-channel switching value composite coding design method and device |
CN115436694A (en) * | 2022-09-05 | 2022-12-06 | 国网北京市电力公司 | Voltage measurement method, system, electronic device and non-volatile storage medium |
-
2016
- 2016-06-24 CN CN201620643041.7U patent/CN205748484U/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107167651A (en) * | 2017-06-19 | 2017-09-15 | 西北大学 | A kind of voltage signal acquisition system and method |
CN109324308A (en) * | 2018-11-20 | 2019-02-12 | 中国电力科学研究院有限公司 | A kind of automatic calibration of electric energy meter system multifunctional detector test method and device |
CN109753474A (en) * | 2018-12-27 | 2019-05-14 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | Adaptive-filtering universal data collecting system based on labview |
CN114003546A (en) * | 2022-01-04 | 2022-02-01 | 之江实验室 | Multi-channel switching value composite coding design method and device |
CN114003546B (en) * | 2022-01-04 | 2022-04-12 | 之江实验室 | Multi-channel switching value composite coding design method and device |
CN115436694A (en) * | 2022-09-05 | 2022-12-06 | 国网北京市电力公司 | Voltage measurement method, system, electronic device and non-volatile storage medium |
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Granted publication date: 20161130 Termination date: 20170624 |