CN103543330B - High-precision circuit collection device - Google Patents
High-precision circuit collection device Download PDFInfo
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- CN103543330B CN103543330B CN201310554522.1A CN201310554522A CN103543330B CN 103543330 B CN103543330 B CN 103543330B CN 201310554522 A CN201310554522 A CN 201310554522A CN 103543330 B CN103543330 B CN 103543330B
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Abstract
A kind of High-precision circuit collection device, comprise voltage transformer (VT), current transformer, dividing potential drop Acquisition Circuit, voltage conversion circuit, two π type filtering circuits, computation chip, microprocessor, button and display circuit, described voltage transformer (VT) summation current transformer connects external input power as signals collecting end, the signal output part of voltage transformer (VT) summation current transformer respectively with dividing potential drop Acquisition Circuit, the signal input part of changing voltage circuit is connected, described dividing potential drop Acquisition Circuit and the signal output part of changing voltage circuit are connected the signal input part of a π type filtering circuit respectively, the signal output part of two π type filtering circuits is all connected with the signal input part of computation chip, the signal output part of described computation chip connects a signal input part of microprocessor, another signal input part of microprocessor connects the signal output part of button, the signal output part of microprocessor connects display circuit.Structure of the present invention is simple, and signals collecting precision is high.
Description
Technical field
The present invention relates to electric energy metrical field, especially a kind of High-precision circuit collection device, can control and process the reliability improving electric instrument by realizing circuit.
Background technology
At present, along with the constantly progress of power transmission and distribution technology, intelligent power equipment is had significant progress, the employing of some intelligent control equipments and intelligent electric instrument, for realizing intelligent grid, there is impetus, carrying out intellectuality also needing gather the circuit of power transmission and distribution device, various signal by calculate and detection display on a display screen, also carry out telecommunication by remote interface and realize remote control and remote measurement.At present, the technology that electric circuit inspection adopts mostly can not reach the requirement of high-end devices in precision, easily produces error.The signal bringing mistake is exported to the signal of high-end devices, easily cause the damage of equipment, therefore concern important to the precision acquisition of circuit, in present most of Acquisition Circuit, also existence drift and temperature affect its precision, its high-precision requirement can not be obtained, so need provide a kind of High-precision circuit collection device reliably, to reach the requirement of high-end devices.
Summary of the invention
The object of the invention is, for the low problem of the precision existed in current electrical signal collection, to propose a kind of High-precision circuit collection device.
Technical scheme of the present invention is:
A kind of High-precision circuit collection device, it comprises voltage transformer (VT), current transformer, dividing potential drop Acquisition Circuit, voltage conversion circuit, two π type filtering circuits, computation chip, microprocessor, button and display circuit, described voltage transformer (VT) summation current transformer connects external input power as the signals collecting end of High-precision circuit collection device, the signal output part of voltage transformer (VT) summation current transformer respectively with dividing potential drop Acquisition Circuit, the signal input part of changing voltage circuit is connected, described dividing potential drop Acquisition Circuit and the signal output part of changing voltage circuit are connected the signal input part of a π type filtering circuit respectively, the signal output part of two π type filtering circuits is all connected with the signal input part of computation chip, the signal output part of described computation chip connects a signal input part of microprocessor, another signal input part of microprocessor connects the signal output part of button, the signal output part of microprocessor connects display circuit.
Computation chip of the present invention adopts the ADE7878 of ADI company.
Dividing potential drop Acquisition Circuit of the present invention comprises resistance in series R2-R7, one end of resistance in series R2-R7 connects an output terminal of voltage transformer (VT), and another output terminal of voltage transformer (VT) is connected with the respective signal input end of π type filtering circuit with the output of the other end of resistance in series R2-R7 as dividing potential drop Acquisition Circuit.
Beneficial effect of the present invention:
The present invention adopts the high-precision three phase metering integrated chip of ADE7878 in conjunction with Acquisition Circuit, high precision, three-phase electric energy metering integrated chip that ADE7878 chip Shi You ADI company releases, there is the 24bit of voltage, electric current, second order sigma-delta type ADC, digital integrator, reference voltage source.Voltage and current effective value is 1000 in dynamic range, and has several data interface and three outputs of pulses flexibly.Total (first-harmonic+harmonic wave) can be performed gain merit and reactive power, apparent power measurement, fundamental active and reactive power measurement, and effective value calculating etc.Circuit adopts current acquisition and voltage collection circuit, and adopt on current acquisition the electric current of high precision current transformer collection by resistance convert voltage to after, voltage acquisition then adopts dividing potential drop Acquisition Circuit and is undertaken outputting to the analysis and calculation that ADE7878 chip carries out data by filter circuit design, structure is simple, and signals collecting precision is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is dividing potential drop Acquisition Circuit figure of the present invention.
Fig. 3 is π type filtering circuit figure of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1, then external input power carries out the analysis and calculation of data again to ADE7878 chip by π type filtering circuit by dividing potential drop Acquisition Circuit through voltage transformer (VT).External input power again by after electric current changing voltage circuit through current transformer, is carried out the analysis and calculation of data, realizes the collection of voltage and current to ADE7878 chip by π type filtering circuit.
The present invention is by the voltage of external input power after voltage transformer (VT) no-load voltage ratio in fig. 2, and input voltage passage has three road univoltage input channels, is successively VA, VA, VC.
The present invention adopts the high-precision three phase metering integrated chip of ADE7878 in conjunction with Acquisition Circuit, high precision, three-phase electric energy metering integrated chip that ADE7878 chip Shi You ADI company releases.Voltage and current effective value is 1000 in dynamic range, and has several data interface and three outputs of pulses flexibly.Total (first-harmonic+harmonic wave) can be performed gain merit and reactive power, apparent power measurement, fundamental active and reactive power measurement, and effective value calculating etc.Circuit adopts current acquisition and voltage collection circuit, and adopt on current acquisition the electric current of high precision current transformer collection by resistance convert voltage to after, voltage acquisition then adopts dividing potential drop Acquisition Circuit and is undertaken outputting to the analysis and calculation that ADE7878 chip carries out data by filter circuit design, structure is simple, and signals collecting precision is high.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (3)
1. a High-precision circuit collection device, it is characterized in that it comprises voltage transformer (VT), current transformer, dividing potential drop Acquisition Circuit, voltage conversion circuit, two π type filtering circuits, computation chip, microprocessor, button and display circuit, described voltage transformer (VT) summation current transformer connects external input power as the signals collecting end of High-precision circuit collection device, the signal output part of voltage transformer (VT) summation current transformer respectively with dividing potential drop Acquisition Circuit, the signal input part of voltage conversion circuit is connected, described dividing potential drop Acquisition Circuit and the signal output part of voltage conversion circuit are connected the signal input part of a π type filtering circuit respectively, the signal output part of two π type filtering circuits is all connected with the signal input part of computation chip, the signal output part of described computation chip connects a signal input part of microprocessor, another signal input part of microprocessor connects the signal output part of button, the signal output part of microprocessor connects display circuit.
2. High-precision circuit collection device according to claim 1, is characterized in that described computation chip adopts the ADE7878 of ADI company.
3. High-precision circuit collection device according to claim 1, it is characterized in that described dividing potential drop Acquisition Circuit comprises resistance in series R2-R7, one end of resistance in series R2-R7 connects an output terminal of voltage transformer (VT), and another output terminal of voltage transformer (VT) is connected with the respective signal input end of π type filtering circuit with the output of the other end of resistance in series R2-R7 as dividing potential drop Acquisition Circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310554522.1A CN103543330B (en) | 2013-11-11 | 2013-11-11 | High-precision circuit collection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310554522.1A CN103543330B (en) | 2013-11-11 | 2013-11-11 | High-precision circuit collection device |
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| Publication Number | Publication Date |
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| CN103543330A CN103543330A (en) | 2014-01-29 |
| CN103543330B true CN103543330B (en) | 2016-01-27 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777779B (en) * | 2015-04-23 | 2018-10-23 | 山东泰开自动化有限公司 | A kind of mutual inductor bipolar signal translation circuit |
| CN105182265A (en) * | 2015-09-29 | 2015-12-23 | 中国电力科学研究院 | Metering chip model selection testing system |
| CN106018925A (en) * | 2016-07-15 | 2016-10-12 | 广州开能电气实业有限公司 | DC system intelligent sensor |
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| CN201233427Y (en) * | 2008-07-04 | 2009-05-06 | 广东东方电讯科技有限公司 | Multifunction electric energy meter |
| CN201311451Y (en) * | 2008-12-05 | 2009-09-16 | 冯占国 | High-accuracy single-phase electric meter |
| CN201532417U (en) * | 2009-09-29 | 2010-07-21 | 临沂市信友电器有限公司 | Electric quantity acquisition module |
| CN202693671U (en) * | 2012-06-21 | 2013-01-23 | 包依勤 | Voltage quality monitoring analyzer |
| CN202794334U (en) * | 2012-09-21 | 2013-03-13 | 郑州三晖电气股份有限公司 | Wide-range direct current standard electric energy meter |
| CN203561691U (en) * | 2013-11-11 | 2014-04-23 | 博耳(宜兴)电力成套有限公司 | High-precision circuit collection device |
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2013
- 2013-11-11 CN CN201310554522.1A patent/CN103543330B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201233427Y (en) * | 2008-07-04 | 2009-05-06 | 广东东方电讯科技有限公司 | Multifunction electric energy meter |
| CN201311451Y (en) * | 2008-12-05 | 2009-09-16 | 冯占国 | High-accuracy single-phase electric meter |
| CN201532417U (en) * | 2009-09-29 | 2010-07-21 | 临沂市信友电器有限公司 | Electric quantity acquisition module |
| CN202693671U (en) * | 2012-06-21 | 2013-01-23 | 包依勤 | Voltage quality monitoring analyzer |
| CN202794334U (en) * | 2012-09-21 | 2013-03-13 | 郑州三晖电气股份有限公司 | Wide-range direct current standard electric energy meter |
| CN203561691U (en) * | 2013-11-11 | 2014-04-23 | 博耳(宜兴)电力成套有限公司 | High-precision circuit collection device |
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