CN203587634U - Wide-range metering electric energy meter sampling in compound manner - Google Patents
Wide-range metering electric energy meter sampling in compound manner Download PDFInfo
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- CN203587634U CN203587634U CN201320688357.4U CN201320688357U CN203587634U CN 203587634 U CN203587634 U CN 203587634U CN 201320688357 U CN201320688357 U CN 201320688357U CN 203587634 U CN203587634 U CN 203587634U
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 29
- 238000005070 sampling Methods 0.000 title claims abstract description 19
- 238000005259 measurement Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
Provided is a wide-range metering electric energy meter sampling in a compound manner. The electric energy meter comprises a special purpose two-channel metering integrated circuit IC1, a microcontroller IC2, and a compound shunt formed by series resistors R1 and R2. The resistor R1, the microcontroller IC2 are connected with an externally-connected to-be-measured current signal input end. A control signal output end of the microcontroller IC2 is connected with a signal input end of the IC1, so as to control the IC1 to switch range. Two ends of the series resistor R1 are connected with two ends of a channel 1 of the IC1 in parallel. Two ends of series-connected resistors R1 and R2 are connected in parallel with two ends of a channel 2 of the IC1. When the electric energy meter is used, when periphery current is large current, the IC2 controls the IC1 to switch to the channel 1 to ensure heavy load requirement of the electric energy meter. When periphery current is low current, the IC2 controls the IC1 to switch to the channel 2, thereby ensuring accuracy of low current metering. The technology satisfies requirement for accurate metering of the electric energy meter in a whole power utilization range.
Description
Technical field
The utility model relates to electronic measurement field, especially introduces the wide-range metering system of compound shunt application, the wide-range metering electric energy meter of specifically a kind of compound sampling.
Background technology
At present, along with the raising of national life level, resident's household electrical appliance quantity significantly increases, and causes resident's power load increasing, for meeting electric energy metrical accuracy requirement, is required to be the electric energy meter that resident installs large current specification.But the high precision of the electric energy meter of these large current specification electric energy metrical when underloading can not be guaranteed.
Therefore, in order to solve the accurate-metering problem of large current specification electric energy meter when the underloading, need to design and develop wide magnitude electrical energy meter, to take into account heavy load and the metering of little electric current, improve accurate measurement precision.
Summary of the invention
The purpose of this utility model is for large current specification electric energy meter, to be difficult to the problem of accurate-metering when the underloading, proposes a kind of wide-range metering electric energy meter of compound sampling.This wide magnitude electrical energy meter can be taken into account heavy load and the metering of little electric current, improves accurate measurement precision.
The technical solution of the utility model is:
A kind of wide-range metering electric energy meter of compound sampling, it comprises special-purpose binary channels measuring IC IC1, microcontroller IC2 and by resistance in series R1, the compound shunt that R2 forms, described resistance R 1, described microcontroller IC2 is connected with the current signal input end to be measured of outside access as the input of the wide-range metering electric energy meter of compound sampling, the control signal output terminal of microcontroller IC2 is connected with the signal input part of special-purpose binary channels measuring IC IC1, control special-purpose binary channels measuring IC IC1 switching range, the two ends of resistance in series R1 the passage 1 that meets special-purpose binary channels measuring IC IC1 are the two ends of large electric current measurement channel, resistance R 1, two ends after R2 series connection the passage 2 that meets special-purpose binary channels measuring IC IC1 are the two ends of little electric current measurement channel.
In compound shunt of the present utility model, the resistance value ratio of resistance R 1, R2 is 1:2-1:4.
In compound shunt of the present utility model, the resistance value ratio of resistance R 1, R2 is 1:3.
In compound shunt of the present utility model, resistance R 1 is that 100 μ Ω, R2 are 300 μ Ω.
The beneficial effects of the utility model:
When the utility model is used, when peripheral electric current is large electric current, IC2 controls IC1 and switches to the heavy load demand that passage 1 guarantees electric energy meter; And when peripheral electric current is little electric current, IC2 controls IC1 and switches to passage 2, can guarantee again the accuracy of little electric current metering.This technique guarantee the requirement of the metering accuracy of electric energy meter within the scope of whole electricity consumption.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
In Fig. 1: IC1 is special-purpose binary channels measuring IC; IC2 is microcontroller.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
At present, in electric energy meter industry, the current sample of single-phase electric energy meter generally adopts the manganese copper diverter of single resistance to carry out current sample, and for the electric energy meter of large current specification, shunt resistance has certain restriction.Because conventional computation chip sampled voltage peak-to-peak value is limited in 30mV left and right now, therefore when doing circuit design, generally adopt the shunt of 100 μ Ω resistances, and due to the error characteristics of computation chip itself, its error precision when small-signal is sampled is poor, simultaneously because sampled signal is less, easily be subject to peripheral interference, therefore the error precision of the electric energy meter that causes existing large current specification when underloading is poor.Given this plant situation, the utility model is ad hoc has counted compound shunt, has two groups of sampling resistances on a shunt, change along with size of current, electric energy meter switches between two groups of samplings, during large electric current, adopts 100 μ Ω resistances, realizes large current load metering; And when little electric current, adopt 400 μ Ω resistances, the sampled signal while being multiplied little electric current, the metering accuracy while guaranteeing little electric current.The application of compound shunt has realized and has taken into account heavy load and the metering of little electric current, guarantees the demand of the accuracy of measuring.
Microcontroller IC2 switches peripheral electric current, and the sampling channel of controlling special-purpose binary channels measuring IC IC1 switches, and during large electric current, sampling channel switches to passage 1; During little electric current, sampling channel switches to passage 2.
As shown in Figure 1, a kind of wide-range metering electric energy meter of compound sampling, it comprises that special-purpose binary channels measuring IC IC1(model can be ADE7953), microcontroller IC2(model can be PIC16F690) and by resistance in series R1, the compound shunt that R2 forms, described resistance R 1, described microcontroller IC2 is connected with the current signal input end to be measured of outside access as the input of the wide-range metering electric energy meter of compound sampling, the control signal output terminal of microcontroller IC2 is connected with the signal input part of special-purpose binary channels measuring IC IC1, control special-purpose binary channels measuring IC IC1 switching range, the two ends of resistance in series R1 the passage 1 that meets special-purpose binary channels measuring IC IC1 are the two ends of large electric current measurement channel, resistance R 1, two ends after R2 series connection the passage 2 that meets special-purpose binary channels measuring IC IC1 are the two ends of little electric current measurement channel.
In compound shunt of the present utility model, the resistance value ratio of resistance R 1, R2 is 1:2-1:4.
In compound shunt of the present utility model, the resistance value ratio of resistance R 1, R2 is 1:3.
The utility model does not relate to partly all prior aries that maybe can adopt same as the prior art to be realized.
Claims (4)
1. the wide-range metering electric energy meter of a compound sampling, it is characterized in that it comprises special-purpose binary channels measuring IC IC1, microcontroller IC2 and by resistance in series R1, the compound shunt that R2 forms, described resistance R 1, described microcontroller IC2 is connected with the current signal input end to be measured of outside access as the input of the wide-range metering electric energy meter of compound sampling, the control signal output terminal of microcontroller IC2 is connected with the signal input part of special-purpose binary channels measuring IC IC1, control special-purpose binary channels measuring IC IC1 switching range, the two ends of resistance in series R1 the passage 1 that meets special-purpose binary channels measuring IC IC1 are the two ends of large electric current measurement channel, resistance R 1, two ends after R2 series connection the passage 2 that meets special-purpose binary channels measuring IC IC1 are the two ends of little electric current measurement channel.
2. the wide-range metering electric energy meter of compound sampling according to claim 1, is characterized in that in described compound shunt, the resistance value ratio of resistance R 1, R2 is 1:2-1:4.
3. the wide-range metering electric energy meter of compound sampling according to claim 1, is characterized in that in described compound shunt, the resistance value ratio of resistance R 1, R2 is 1:3.
4. the wide-range metering electric energy meter of compound sampling according to claim 1, is characterized in that in described compound shunt, resistance R 1 is that 100 μ Ω, R2 are 300 μ Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320688357.4U CN203587634U (en) | 2013-11-04 | 2013-11-04 | Wide-range metering electric energy meter sampling in compound manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320688357.4U CN203587634U (en) | 2013-11-04 | 2013-11-04 | Wide-range metering electric energy meter sampling in compound manner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203587634U true CN203587634U (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320688357.4U Expired - Lifetime CN203587634U (en) | 2013-11-04 | 2013-11-04 | Wide-range metering electric energy meter sampling in compound manner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977459A (en) * | 2015-07-15 | 2015-10-14 | 威胜集团有限公司 | Current detection device, electric energy meter made by device and metering method thereof |
| CN109959807A (en) * | 2018-10-11 | 2019-07-02 | 郭建国 | A kind of intelligent electric meter current loop sampling current divider and its metering circuit |
| CN109959821A (en) * | 2018-10-11 | 2019-07-02 | 郭建国 | A kind of high-precision intelligent ammeter based on current divider |
-
2013
- 2013-11-04 CN CN201320688357.4U patent/CN203587634U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977459A (en) * | 2015-07-15 | 2015-10-14 | 威胜集团有限公司 | Current detection device, electric energy meter made by device and metering method thereof |
| CN109959807A (en) * | 2018-10-11 | 2019-07-02 | 郭建国 | A kind of intelligent electric meter current loop sampling current divider and its metering circuit |
| CN109959821A (en) * | 2018-10-11 | 2019-07-02 | 郭建国 | A kind of high-precision intelligent ammeter based on current divider |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Qidong City, Jiangsu province 226200 Nantong City Lin Yang Lu No. 666 Patentee after: JIANGSU LINYANG ENERGY Co.,Ltd. Address before: Qidong City, Jiangsu province 226200 Nantong City Lin Yang Lu No. 666 Patentee before: JIANGSU LINYANG ELECTRONICS Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140507 |