CN102072978A - Single-phase double-circuit manganese copper metering anti-theft electric charge-controlled intelligent electric energy meter - Google Patents
Single-phase double-circuit manganese copper metering anti-theft electric charge-controlled intelligent electric energy meter Download PDFInfo
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- CN102072978A CN102072978A CN 201110026422 CN201110026422A CN102072978A CN 102072978 A CN102072978 A CN 102072978A CN 201110026422 CN201110026422 CN 201110026422 CN 201110026422 A CN201110026422 A CN 201110026422A CN 102072978 A CN102072978 A CN 102072978A
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Abstract
The invention relates to the technical field of single-phase charge-controlled electric energy meters and provides a single-phase double-circuit manganese copper metering anti-theft electric charge-controlled intelligent electric energy meter. The electric energy meter comprises a live wire sampling module, a null line sampling module, a live wire electric energy metering module, a null line electric energy metering module, a singlechip central processing unit (CPU) and a basic function module of the intelligent electric energy meter, wherein the live wire sampling module is connected with the singlechip CPU through the live wire electric energy metering module; and the null line sampling module is connected with the singlechip CPU through the null line electric energy metering module. The electric energy meter can meet the requirements on high precision and low power consumption and can more accurately detect and process electricity-stealing behaviors.
Description
Technical field
The present invention relates to single-phase expense control electric energy meter technical field, particularly a kind of single-phase double-loop copper-manganese measures thief-proof electricity charge control intelligent electric energy meter.
Background technology
Present employed most of single loop electric energy meters, all adopt and flow through the foundation of the electric current of live wire, if electricity filching person with the live wire short circuit, makes electric current can not flow through the sampling device of electric energy meter inside as electric energy metrical, electric energy meter does not just measure load institute power consumption, causes and uses electric loss.At the problems referred to above, general anti-electricity-theft electric energy meter can be selected special-purpose anti-electricity-theft computation chip for use, as chip AD7751, but because of its zero line passage uses mutual inductor sample, the harmonious ripple ability of anti-DC component, and the uneven switching threshold in two loops is fixed value, can not adjust according to actual needs.Therefore, common single loop electric energy meter can't accurately detect or handle electricity filching behavior.
Summary of the invention
Purpose of the present invention is exactly in order to overcome above-mentioned the deficiencies in the prior art part, and provides a kind of single-phase double-loop copper-manganese to measure thief-proof electricity charge control intelligent electric energy meter, not only can satisfy the requirement of high precision, low-power consumption, more can accurately detect and handle electricity filching behavior.
The objective of the invention is to realize by following technical measures: the single-phase double-loop copper-manganese measures thief-proof electricity charge control intelligent electric energy meter, comprise live wire sampling module, zero line sampling module, live wire electric energy metrical module, zero line electric energy metrical module, single-chip microcomputer CPU (central processing unit) and intelligent electric energy meter basic function module, described live wire sampling module links through live wire electric energy metrical module and single-chip microcomputer CPU (central processing unit), and described zero line sampling module links through zero line electric energy metrical module and single-chip microcomputer CPU (central processing unit).
In technique scheme, described live wire sampling module is by the hot voltage sample circuit, the live wire current sampling circuit, and the live wire manganese copper diverter that links to each other with live wire current sampling circuit input end is formed; Described zero line sampling module is by the zero line voltage sampling circuit, the neutral line current sample circuit, and the zero line manganese copper diverter that links to each other with neutral line current sample circuit input end is formed.
In technique scheme, described live wire electric energy metrical module I C1 and zero line electric energy metrical module I C2 all adopt computation chip AD71056; 4 pin of described live wire electric energy metrical module I C1,5 pin are through the start to exchange fire sampling end of line manganese copper diverter of live wire current sampling circuit, 2 pin, 3 pin of the described live wire electric energy metrical module I C1 line voltage sampling circuit of starting to exchange fire, 14 pin of described live wire electric energy metrical module I C1 are that live wire metrical pulse output terminal and single-chip microcomputer CPU (central processing unit) link; 4 pin of described zero line electric energy metrical module I C2,5 pin are through the sampling end of neutral line current sample circuit connecting to neutral line manganese copper diverter, 2 pin of described zero line electric energy metrical module I C1,3 pin connecting to neutral line voltage sampling circuits, 14 pin of described zero line electric energy metrical module I C2 are that zero line metrical pulse output terminal and single-chip microcomputer CPU (central processing unit) link.
In technique scheme, described neutral line current sample circuit is made up of magnetic bead L1, magnetic bead L2, magnetic bead L3, resistance R 1, resistance R 2, capacitor C 1, capacitor C 2, wherein zero line output terminal J1 is connected to 4 pin of zero line electric energy metrical module I C2 through magnetic bead L1 and resistance R 1, and zero line input end J2 is through magnetic bead L3 ground connection; 1 end of described manganese copper diverter MT1 and 2 ends are connected in parallel between zero line output terminal J1 and the zero line input end J2, and 3 ends of manganese copper diverter MT1 are connected to 5 pin of zero line electric energy metrical module I C2 through magnetic bead L2 and resistance R 2; The 4 foot meridian capacitor C1 ground connection of described zero line electric energy metrical module I C2, the 5 foot meridian capacitor C2 ground connection of zero line electric energy metrical module I C2.
In technique scheme, the potential-divider network that described zero line voltage sampling circuit is made up of one group of resistance is formed, and the zero line voltage sampling circuit is connected between 2 pin, 3 pin of zero line input end and zero line electric energy metrical module I C2.
In technique scheme, the chip model that described single-chip microcomputer CPU (central processing unit) adopts is PIC18F67J11.
Single-phase double-loop copper-manganese of the present invention measures the utilization of the thief-proof electricity charge control intelligent electric energy meter zero line electric energy sampling module is set on the zero line passage, and dispose zero line electric energy metrical module separately, improved the anti-DC component ability of electric energy meter, and the uneven switching threshold among the present invention between live wire passage and the zero line passage is very little, and this switching threshold also can be by the program setting.The present invention also has advantages such as high precision, high reliability, low-power consumption.
Description of drawings
Fig. 1 measures the circuit block diagram of thief-proof electricity charge control intelligent electric energy meter for embodiment of the invention single-phase double-loop copper-manganese.
Fig. 2 is the circuit connection diagram of two-circuit copper-manganese electric energy metrical module in the embodiment of the invention.
Fig. 3 is a neutral line current sample circuit connection layout in the embodiment of the invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Present embodiment single-phase double-loop copper-manganese measures thief-proof electricity charge control intelligent electric energy meter, comprises live wire sampling module, zero line sampling module, live wire electric energy metrical module, zero line electric energy metrical module, single-chip microcomputer CPU (central processing unit) and intelligent electric energy meter basic function module.As shown in Figure 1, described power module respectively with the power supply that links of live wire electric energy metrical module, zero line electric energy metrical module and single-chip microcomputer CPU (central processing unit), described live wire sampling module links through live wire electric energy metrical module and single-chip microcomputer CPU (central processing unit), and described zero line sampling module links through zero line electric energy metrical module and single-chip microcomputer CPU (central processing unit).
Above-mentioned live wire measurement channel is the main channel, and the zero line measurement channel is a subaisle.
As shown in Figure 2, the sampling module of live wire described in the present embodiment is by the hot voltage sample circuit, the live wire current sampling circuit, and the live wire manganese copper diverter that links to each other with live wire current sampling circuit input end is formed; Described zero line sampling module is by the zero line voltage sampling circuit, the neutral line current sample circuit, and the zero line manganese copper diverter that links to each other with neutral line current sample circuit input end is formed.
4 pin of described live wire electric energy metrical module I C1,5 pin are through the start to exchange fire sampling end of line manganese copper diverter of live wire current sampling circuit, 2 pin, 3 pin of the described live wire electric energy metrical module I C1 line voltage sampling circuit of starting to exchange fire, 14 pin of described live wire electric energy metrical module I C1 are that live wire metrical pulse output terminal and single-chip microcomputer CPU (central processing unit) link; 4 pin of described zero line electric energy metrical module I C2,5 pin are through the sampling end of neutral line current sample circuit connecting to neutral line manganese copper diverter, 2 pin of described zero line electric energy metrical module I C1,3 pin connecting to neutral line voltage sampling circuits, 14 pin of described zero line electric energy metrical module I C2 are that zero line metrical pulse output terminal and single-chip microcomputer CPU (central processing unit) link.
In the foregoing description, the chip model that described single-chip microcomputer CPU (central processing unit) adopts is PIC18F67J11.
In the foregoing description, the live wire sampling module is identical with zero line sampling module circuit structure, explains with the zero line sampling module below.
As shown in Figure 3, in the present embodiment, described neutral line current sample circuit is made up of magnetic bead L1, magnetic bead L2, magnetic bead L3, resistance R 1, resistance R 2, capacitor C 1, capacitor C 2, wherein zero line output terminal J1 is connected to 4 pin of zero line electric energy metrical module I C2 through magnetic bead L1 and resistance R 1, and zero line input end J2 is through magnetic bead L3 ground connection; 1 end of described manganese copper diverter MT1 and 2 ends are connected in parallel between zero line output terminal J1 and the zero line input end J2, and 3 ends of manganese copper diverter MT1 are connected to 5 pin of zero line electric energy metrical module I C2 through magnetic bead L2 and resistance R 2; The 4 foot meridian capacitor C1 ground connection of described zero line electric energy metrical module I C2, the 5 foot meridian capacitor C2 ground connection of zero line electric energy metrical module I C2.
The potential-divider network that described zero line voltage sampling circuit is made up of one group of resistance is formed, and the zero line voltage sampling circuit is connected between 2 pin, 3 pin of zero line input end and zero line electric energy metrical module I C2.
In the foregoing description, the current signal of live wire passage, zero line passage inserts live wire electric energy metrical module I C1 and zero line electric energy metrical module I C2 by live wire manganese copper diverter and zero line manganese copper diverter through live wire current sampling circuit and neutral line current sample circuit respectively, the pulse signal that live wire electric energy metrical module I C1 and zero line electric energy metrical module I C2 output are directly proportional with real power, this pulse signal input single-chip microcomputer CPU (central processing unit) is handled.The single-chip microcomputer CPU (central processing unit) adds up the pulse signal of receiving, when the high-frequency pulse signal of the electric energy metrical module of one of them passage output when accumulative total reaches the preset value number earlier, the single-chip microcomputer CPU (central processing unit) just is judged as this channel current greater than the another one passage, power consumption is carried out one-accumulate according to this passage metering result, remove the accumulative total high-frequency impulse number of two passage electric energy metrical modules input simultaneously, restart to circulate next time.Like this, the pulse signal of the passage that electric current is big always is accumulated to preset value earlier, and then the single-chip microcomputer CPU (central processing unit) is a payment foundation with the electric current of this passage just always, even the short circuit live wire, electric energy meter also can pass through the actual electricity consumption of the accurate metering user of neutral line current.
Claims (5)
1. the single-phase double-loop copper-manganese measures thief-proof electricity charge control intelligent electric energy meter, comprise live wire sampling module, zero line sampling module, live wire electric energy metrical module, zero line electric energy metrical module, single-chip microcomputer CPU (central processing unit) and intelligent electric energy meter basic function module, it is characterized in that: described live wire sampling module links through live wire electric energy metrical module and single-chip microcomputer CPU (central processing unit), and described zero line sampling module links through zero line electric energy metrical module and single-chip microcomputer CPU (central processing unit).
2. single-phase double-loop copper-manganese according to claim 1 measures thief-proof electricity charge control intelligent electric energy meter, it is characterized in that: described live wire sampling module is by the hot voltage sample circuit, the live wire current sampling circuit, and the live wire manganese copper diverter that links to each other with live wire current sampling circuit input end is formed; Described zero line sampling module is by the zero line voltage sampling circuit, the neutral line current sample circuit, and the zero line manganese copper diverter that links to each other with neutral line current sample circuit input end is formed.
3. single-phase double-loop copper-manganese according to claim 2 measures thief-proof electricity charge control intelligent electric energy meter, it is characterized in that: described live wire electric energy metrical module I C1 and zero line electric energy metrical module I C2 all adopt computation chip AD71056; 4 pin of described live wire electric energy metrical module I C1,5 pin are through the start to exchange fire sampling end of line manganese copper diverter of live wire current sampling circuit, 2 pin, 3 pin of the described live wire electric energy metrical module I C1 line voltage sampling circuit of starting to exchange fire, 14 pin of described live wire electric energy metrical module I C1 are that live wire metrical pulse output terminal and single-chip microcomputer CPU (central processing unit) link; 4 pin of described zero line electric energy metrical module I C2,5 pin are through the sampling end of neutral line current sample circuit connecting to neutral line manganese copper diverter, 2 pin of described zero line electric energy metrical module I C1,3 pin connecting to neutral line voltage sampling circuits, 14 pin of described zero line electric energy metrical module I C2 are that zero line metrical pulse output terminal and single-chip microcomputer CPU (central processing unit) link.
4. single-phase double-loop copper-manganese according to claim 2 measures thief-proof electricity charge control intelligent electric energy meter, it is characterized in that: described neutral line current sample circuit is made up of magnetic bead L1, magnetic bead L2, magnetic bead L3, resistance R 1, resistance R 2, capacitor C 1, capacitor C 2, wherein zero line output terminal J1 is connected to 4 pin of zero line electric energy metrical module I C2 through magnetic bead L1 and resistance R 1, and zero line input end J2 is through magnetic bead L3 ground connection; 1 end of described manganese copper diverter MT1 and 2 ends are connected in parallel between zero line output terminal J1 and the zero line input end J2, and 3 ends of manganese copper diverter MT1 are connected to 5 pin of zero line electric energy metrical module I C2 through magnetic bead L2 and resistance R 2; The 4 foot meridian capacitor C1 ground connection of described zero line electric energy metrical module I C2, the 5 foot meridian capacitor C2 ground connection of zero line electric energy metrical module I C2.
5. single-phase double-loop copper-manganese according to claim 1 measures thief-proof electricity charge control intelligent electric energy meter, it is characterized in that: the chip model that described single-chip microcomputer CPU (central processing unit) adopts is PIC18F67J11.
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| CN 201110026422 CN102072978A (en) | 2011-01-25 | 2011-01-25 | Single-phase double-circuit manganese copper metering anti-theft electric charge-controlled intelligent electric energy meter |
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| CN 201110026422 CN102072978A (en) | 2011-01-25 | 2011-01-25 | Single-phase double-circuit manganese copper metering anti-theft electric charge-controlled intelligent electric energy meter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502694A (en) * | 2014-12-31 | 2015-04-08 | 宁波三星电气股份有限公司 | Single-phase electric energy meter sampling circuit |
| WO2018053726A1 (en) * | 2016-09-21 | 2018-03-29 | 深圳市思达仪表有限公司 | Method for generating pulses by double manganin sampling circuits of single-phase three-wire electric energy meter |
| CN114487529A (en) * | 2022-01-17 | 2022-05-13 | 无锡市恒通电器有限公司 | Single-phase electric energy meter with instantaneous value electricity stealing and electric leakage prevention detection function and with time scale/phase angle |
| CN116106623A (en) * | 2023-04-12 | 2023-05-12 | 浙江恒业电子股份有限公司 | Dual-power calculation single-phase electric energy meter and method for non-isolated sampling alternating current |
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| CN2781382Y (en) * | 2005-03-25 | 2006-05-17 | 杭州利尔达单片机技术有限公司 | Seingle-phase electric energy meter with device for preventing electric burglary |
| CN2921840Y (en) * | 2006-04-03 | 2007-07-11 | 杭州华隆电子技术有限公司 | Single-phase antistealing electricity electric energy meter |
| CN201247283Y (en) * | 2008-08-15 | 2009-05-27 | 张卫东 | Dual-loop dual-copper-manganese resistance sampling single-phase three-wire electric energy meter |
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2011
- 2011-01-25 CN CN 201110026422 patent/CN102072978A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2781382Y (en) * | 2005-03-25 | 2006-05-17 | 杭州利尔达单片机技术有限公司 | Seingle-phase electric energy meter with device for preventing electric burglary |
| CN2921840Y (en) * | 2006-04-03 | 2007-07-11 | 杭州华隆电子技术有限公司 | Single-phase antistealing electricity electric energy meter |
| CN201247283Y (en) * | 2008-08-15 | 2009-05-27 | 张卫东 | Dual-loop dual-copper-manganese resistance sampling single-phase three-wire electric energy meter |
Non-Patent Citations (1)
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| 《单片机与嵌入式系统应用》 20071231 王春光 等 AD71056基于LPC921的电能表设计 第54-56，60页 3-4 , 第10期 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502694A (en) * | 2014-12-31 | 2015-04-08 | 宁波三星电气股份有限公司 | Single-phase electric energy meter sampling circuit |
| WO2018053726A1 (en) * | 2016-09-21 | 2018-03-29 | 深圳市思达仪表有限公司 | Method for generating pulses by double manganin sampling circuits of single-phase three-wire electric energy meter |
| CN114487529A (en) * | 2022-01-17 | 2022-05-13 | 无锡市恒通电器有限公司 | Single-phase electric energy meter with instantaneous value electricity stealing and electric leakage prevention detection function and with time scale/phase angle |
| CN116106623A (en) * | 2023-04-12 | 2023-05-12 | 浙江恒业电子股份有限公司 | Dual-power calculation single-phase electric energy meter and method for non-isolated sampling alternating current |
| CN116106623B (en) * | 2023-04-12 | 2023-08-29 | 浙江恒业电子股份有限公司 | Dual-power calculation single-phase electric energy meter and method for non-isolated sampling alternating current |
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Application publication date: 20110525 |