CN203561691U - High-precision circuit collection device - Google Patents
High-precision circuit collection device Download PDFInfo
- Publication number
- CN203561691U CN203561691U CN201320705889.4U CN201320705889U CN203561691U CN 203561691 U CN203561691 U CN 203561691U CN 201320705889 U CN201320705889 U CN 201320705889U CN 203561691 U CN203561691 U CN 203561691U
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- circuit
- voltage
- signal output
- precision
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Abstract
A high-precision circuit collection device comprises a voltage transformer, a current transformer, a partial voltage collection circuit, a voltage switching circuit, two pi-type filter circuits, a metering chip, a microprocessor, a key and a display circuit. The voltage transformer and the current transformer serve as signal collection terminals and are connected with an external input power source. The signal output ends of the voltage transformer and the current transformer are connected with the signal input ends of the partial voltage collection circuit and the voltage switching circuit respectively. The signal output ends of the partial voltage collection circuit and the voltage switching circuit are connected with the signal input ends of the pi-type filter circuits respectively. The signal output ends of the two pi-type filter circuits are respectively connected with the signal input end of the metering chip. The signal output end of the metering chip is connected with one signal input end of the microprocessor. The other signal input end of the microprocessor is connected with the signal output end of the key. The signal output end of the microprocessor is connected with the display circuit. The high-precision circuit collection device is simple in structure and high in signal collection precision.
Description
Technical field
The utility model. relate to electric energy metrical field, especially a kind of high-precision circuit harvester, can realize circuit and control and process the reliability that improves electric instrument.
Background technology
At present, along with power transmission and distribution technology is constantly progressive, make intelligent power equipment have significant progress, the employing of some intelligent control equipments and intelligent electric instrument, for realizing intelligent grid, there is impetus, in intellectuality, also need the circuit of power transmission and distribution device to gather carrying out, various signals by calculate and detection display on display screen, also can carry out telecommunication by remote interface and realize remote control and remote measurement.At present, the technology mostly adopting in electric circuit inspection can not reach the requirement of high-end devices in precision, easily produces error.Signal output to high-end devices brings wrong signal, easily cause the damage of equipment, therefore to the precision collection of circuit, concern important, in present most of Acquisition Circuit, also exist drift and temperature to affect its precision, can not obtain its high-precision requirement, so needing to provide a kind of reliable high-precision circuit harvester, to reach the requirement of high-end devices.
Summary of the invention
The utility model. object be for the low problem of the precision existing in current electrical signal collection, a kind of high-precision circuit harvester is proposed.
The utility model. technical scheme be:
A kind of high-precision circuit harvester, 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 outside input power as the signals collecting end of high-precision circuit harvester, 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 respectively the signal input part of a π type filtering circuit, 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.
The utility model. computation chip adopt the ADE7878 of ADI company.
The utility model. dividing potential drop Acquisition Circuit comprise resistance in series R2-R7, one end of resistance in series R2-R7 connects an output terminal of voltage transformer (VT), and the output as dividing potential drop Acquisition Circuit is connected with the respective signal input end of π type filtering circuit another output terminal of voltage transformer (VT) with the other end of resistance in series R2-R7.
The utility model. beneficial effect:
The utility model. adopt 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, the 24bit with 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 pulse flexibly.Can carry out total (first-harmonic+harmonic wave) meritorious with reactive power, apparent power measurement, first-harmonic is meritorious and reactive power measurement, and effective value calculating etc.On circuit, adopt current acquisition and voltage collection circuit, and on current acquisition, adopt electric current the converting to after voltage by resistance of high precision current transformer collection, voltage acquisition adopts dividing potential drop Acquisition Circuit and outputs to by filtering circuit design the analysis and calculation that ADE7878 chip carries out data, simple in structure, signals collecting precision is high.
Accompanying drawing explanation
Fig. 1 is the utility model. structural representation.
Fig. 2 is the utility model. dividing potential drop Acquisition Circuit figure.
Fig. 3 is the utility model. π type filtering circuit figure.
Embodiment
Below in conjunction with drawings and Examples to the utility model. be further described.
As shown in Figure 1, then outside input power carries out the analysis and calculation of data by π type filtering circuit by dividing potential drop Acquisition Circuit again through voltage transformer (VT) to ADE7878 chip.Outside input power again by after current conversion potential circuit, to ADE7878 chip carries out the analysis and calculation of data by π type filtering circuit through current transformer, realizes the collection of voltage and current.
The utility model in Fig. 2. the voltage by outside input power after voltage transformer (VT) no-load voltage ratio, input voltage passage is to have three road univoltage input channels, is successively VA, VA, VC.
The utility model. adopt 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 pulse flexibly.Can carry out total (first-harmonic+harmonic wave) meritorious with reactive power, apparent power measurement, first-harmonic is meritorious and reactive power measurement, and effective value calculating etc.On circuit, adopt current acquisition and voltage collection circuit, and on current acquisition, adopt electric current the converting to after voltage by resistance of high precision current transformer collection, voltage acquisition adopts dividing potential drop Acquisition Circuit and outputs to by filtering circuit design the analysis and calculation that ADE7878 chip carries out data, simple in structure, signals collecting precision is high.
The utility model. do not relate to partly all prior aries that maybe can adopt same as the prior art and realized.
Claims (3)
1. a high-precision circuit harvester, 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 outside input power as the signals collecting end of high-precision circuit harvester, 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 respectively the signal input part of a π type filtering circuit, 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 harvester according to claim 1, is characterized in that described computation chip adopts the ADE7878 of ADI company.
3. high-precision circuit harvester 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 the output as dividing potential drop Acquisition Circuit is connected with the respective signal input end of π type filtering circuit another output terminal of voltage transformer (VT) with the other end of resistance in series R2-R7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320705889.4U CN203561691U (en) | 2013-11-11 | 2013-11-11 | High-precision circuit collection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320705889.4U CN203561691U (en) | 2013-11-11 | 2013-11-11 | High-precision circuit collection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203561691U true CN203561691U (en) | 2014-04-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320705889.4U Withdrawn - After Issue CN203561691U (en) | 2013-11-11 | 2013-11-11 | High-precision circuit collection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203561691U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543330A (en) * | 2013-11-11 | 2014-01-29 | 博耳(宜兴)电力成套有限公司 | High-precision circuit collection device |
-
2013
- 2013-11-11 CN CN201320705889.4U patent/CN203561691U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543330A (en) * | 2013-11-11 | 2014-01-29 | 博耳(宜兴)电力成套有限公司 | High-precision circuit collection device |
| CN103543330B (en) * | 2013-11-11 | 2016-01-27 | 博耳(宜兴)电力成套有限公司 | High-precision circuit collection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140423 Effective date of abandoning: 20160127 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |