CN102854356B - Two copper-manganese is adopted to design the circuit of anti-external magnetic field interference - Google Patents
Two copper-manganese is adopted to design the circuit of anti-external magnetic field interference Download PDFInfo
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- CN102854356B CN102854356B CN201210365386.7A CN201210365386A CN102854356B CN 102854356 B CN102854356 B CN 102854356B CN 201210365386 A CN201210365386 A CN 201210365386A CN 102854356 B CN102854356 B CN 102854356B
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Abstract
The circuit adopting two copper-manganese to design the interference of anti-external magnetic field comprises shape and structure identical and two pieces of copper-manganese sheets that impedance is identical and insulation spacer, two pieces of described copper-manganese sheets are divided into the first copper-manganese sheet and the second copper-manganese sheet, first copper-manganese sheet is superimposed on the downside of the second copper-manganese sheet, insulation spacer is accompanied between first copper-manganese sheet and the second copper-manganese sheet, first copper-manganese sheet side is provided with the first sample line and the second sample line, second copper-manganese sheet side is provided with the 3rd sample line and the 4th sample line, first sample line is connected with the 4th sample line, and the second sample line is connected with the 3rd sample line.Beneficial effect of the present invention is: the reverse signal utilizing space magnetic field to produce on the second extra copper-manganese sheet is offset due to the undesired signal that space magnetic field produces on the first copper-manganese sheet, thus realizes the counteracting of magnetic interference.
Description
Technical field
The present invention relates to and adopt two copper-manganese to design the circuit of anti-external magnetic field interference, the two copper-manganese of employing particularly relating to a kind of electronic electric energy meter field designs the circuit of anti-external magnetic field interference.
Background technology
The element that the current sample parts of Current electronic formula electric energy meter particularly single-phase electronic energy meter generally adopt is single copper-manganese.Because it has good stability, the feature that temperature variation is little, can adapt in the instrument of electric energy meter and the sampling of relevant needs big current, is a small voltage signal, thus realizes the sampling of electric current by big current signal by the impedance transformation of copper-manganese itself.This device, as the Sampling device of the current sampling devices of electronic electric energy meter, particularly single-phase electric energy meter, has had the history of decades, until in still using as a kind of necessary Sampling device today.
Current most single-phase electric energy meter all uses monolithic copper-manganese as the sampling of live wire electric current, realizes the function of metering.Current this copper-manganese and outlet method are due to its intrinsic eddy current, electromagnetic induction characteristic, cause and disturb at strong external magnetic field, when particularly with frequency homophase magnetic interference, a undesired signal superimposed with actual samples electric current can be produced, cause the inaccurate of sampling, the result of impact sampling.Uncertain due to what disturb, this interference is difficult to carry out filtering with software approach.Way general be at present reduce loop area, increase magnetic field shielding, away from magnetic interference etc., can not fundamentally head it off.
Owing to using single-phase electric energy meter in a large number in electrical network, similar interference source is there is in a large number in the installation environment of electric energy meter, cause the error change in the improper metering of electric energy meter under user does not have electricity consumption situation (anti-diving was lost efficacy) and normal electricity consumption situation, bring a lot of puzzlement to users.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art and shortcoming, the invention provides one and utilize Signal averaging principle, superpose a undesired signal in contrast for undesired signal, a positive and a negative two signals are superposed mutually thus offsets the circuit that the two copper-manganese of the employing disturbed designs the interference of anti-external magnetic field.
The circuit adopting two copper-manganese to design the interference of anti-external magnetic field comprises shape and structure identical and two pieces of copper-manganese sheets that impedance is identical and insulation spacer, two pieces of described copper-manganese sheets are divided into the first copper-manganese sheet and the second copper-manganese sheet, first copper-manganese sheet is superimposed on the downside of the second copper-manganese sheet, insulation spacer is accompanied between first copper-manganese sheet and the second copper-manganese sheet, first copper-manganese sheet side is provided with the first sample line and the second sample line, second copper-manganese sheet side is provided with the 3rd sample line and the 4th sample line, first sample line is connected with the 4th sample line, and the second sample line is connected with the 3rd sample line.
Beneficial effect of the present invention is: adopt two pieces of copper-manganese sheets as the live wire current sample of single-phase electric energy meter, wherein one piece is access live wire loop, use as normal signal sampling, a slice is superimposed upon on this normal copper-manganese in addition, pass through physical isolation between the two, two copper-manganese sheet bodies are without physical connection, the copper-manganese sheet sampling circuit reversal connection of extra increase is at the terminals of normal sample copper-manganese, , first copper-manganese sheet side is provided with the first sample line and the second sample line, second copper-manganese sheet side is provided with the 3rd sample line and the 4th sample line, first sample line is connected with the 4th sample line, second sample line is connected with the 3rd sample line, adopt same impedance, two pieces of copper-manganese sheets of identical encirclement area, the reverse signal utilizing space magnetic field to produce on the second extra copper-manganese sheet offsets the undesired signal that space magnetic field produces on the first copper-manganese sheet, thus realize the counteracting of magnetic interference.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the invention will be further described, but protection scope of the present invention is not limited to this.
Embodiment 1
As shown in Figure 1, the circuit adopting two copper-manganese to design the interference of anti-external magnetic field comprises shape and structure identical and two pieces of copper-manganese sheets that impedance is identical and insulation spacer 2, two pieces of described copper-manganese sheets are divided into the first copper-manganese sheet 3 and the second copper-manganese sheet 1, first copper-manganese sheet 3 is superimposed on the downside of the second copper-manganese sheet 1, insulation spacer 2 is accompanied between first copper-manganese sheet 3 and the second copper-manganese sheet 1, first copper-manganese sheet 3 side is provided with the first sample line 6 and the second sample line 7, second copper-manganese sheet 1 side is provided with the 3rd sample line 4 and the 4th sample line 5, first sample line 6 is connected with the 4th sample line 5, second sample line 7 is connected with the 3rd sample line 4.
Contain two copper-manganese sheets of protection feature to some extent; wherein a slice is by rigidity or be softly connected on large-signal loop; or by having on the relay of on-off function; when there being electric current to pass through; two copper-manganese completes the conversion of large-signal electric current to small signal; and utilize wire to be transferred in measurement loop by the small signal at sampled point two ends, make metering circuit obtain sampled signal, thus the collection of settling signal.
Finally, it should be pointed out that above embodiment is only the more representational example of the present invention.Obviously, the invention is not restricted to above-described embodiment, many distortion can also be had.Every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all should think and belong to protection scope of the present invention.
Claims (1)
1. adopt two copper-manganese to design the circuit of anti-external magnetic field interference, it is characterized in that: described two copper-manganese anti-jamming circuit bags
Draw together shape and structure identical and two pieces of copper-manganese sheets that impedance is identical and insulation spacer, two pieces of described copper-manganese sheets are divided into the first copper-manganese
Sheet and the second copper-manganese sheet, the first copper-manganese sheet is superimposed on the downside of the second copper-manganese sheet, accompanies between the first copper-manganese sheet and the second copper-manganese sheet
Insulation spacer, the first copper-manganese sheet side is provided with the first sample line and the second sample line, and the second copper-manganese sheet side is provided with the 3rd and adopts
Line-transect and the 4th sample line, first sample line is connected with the 4th sample line, second sample line is connected with the 3rd sample line, described first copper-manganese sheet and the second copper-manganese sheet are by rigidity or be softly connected on large-signal loop, electric current is transformed into small signal by described first copper-manganese sheet and the second copper-manganese sheet to large-signal electric current, described first sample line be connected with the 4th sample line be connected with the second sample line and the 3rd sample line after the small signal at sampled point two ends is transferred in measurement loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210365386.7A CN102854356B (en) | 2012-09-27 | 2012-09-27 | Two copper-manganese is adopted to design the circuit of anti-external magnetic field interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210365386.7A CN102854356B (en) | 2012-09-27 | 2012-09-27 | Two copper-manganese is adopted to design the circuit of anti-external magnetic field interference |
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| Publication Number | Publication Date |
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| CN102854356A CN102854356A (en) | 2013-01-02 |
| CN102854356B true CN102854356B (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210365386.7A Active CN102854356B (en) | 2012-09-27 | 2012-09-27 | Two copper-manganese is adopted to design the circuit of anti-external magnetic field interference |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114651575A (en) * | 2022-04-16 | 2022-06-24 | 石河子大学 | Electromagnetic interference prevention type high-voltage electrostatic seed metering roller |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976020Y (en) * | 2006-10-20 | 2007-11-14 | 深圳长城开发科技股份有限公司 | Current divider |
| CN202177647U (en) * | 2011-08-12 | 2012-03-28 | 桐乡市伟达电子有限公司 | Alternating magnetic field resistant manganin diverter |
| CN202854203U (en) * | 2012-09-27 | 2013-04-03 | 杭州炬华科技股份有限公司 | Circuit employing double manganese bronze design external magnetic field interference resistance |
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2012
- 2012-09-27 CN CN201210365386.7A patent/CN102854356B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976020Y (en) * | 2006-10-20 | 2007-11-14 | 深圳长城开发科技股份有限公司 | Current divider |
| CN202177647U (en) * | 2011-08-12 | 2012-03-28 | 桐乡市伟达电子有限公司 | Alternating magnetic field resistant manganin diverter |
| CN202854203U (en) * | 2012-09-27 | 2013-04-03 | 杭州炬华科技股份有限公司 | Circuit employing double manganese bronze design external magnetic field interference resistance |
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| CN102854356A (en) | 2013-01-02 |
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