CN103278679A - Comparison circuit for electric energy measuring chip - Google Patents
Comparison circuit for electric energy measuring chip Download PDFInfo
- Publication number
- CN103278679A CN103278679A CN201310202322XA CN201310202322A CN103278679A CN 103278679 A CN103278679 A CN 103278679A CN 201310202322X A CN201310202322X A CN 201310202322XA CN 201310202322 A CN201310202322 A CN 201310202322A CN 103278679 A CN103278679 A CN 103278679A
- Authority
- CN
- China
- Prior art keywords
- module
- current
- active power
- comparison module
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a comparison circuit for an electric energy measuring chip. The comparison circuit comprises a first current signal sampling module, a second current signal sampling module, a voltage signal sampling module, a first active power module, a second active power module, a comparison module, a threshold value comparison module and a timing module, wherein the first active power module is respectively connected with the first current signal sampling module and the voltage signal sampling module, the second active power module is respectively connected with the second current signal sampling module and the voltage signal sampling module, the comparison module is respectively connected with the first active power module and the second active power module, the threshold value comparison module is connected with the comparison module, and the timing module is connected with the threshold value comparison module. By adopting the two-channel comparison structure with two selectable modes, the detection of two channels in imbalance can be realized, and whether the electric power stealing behavior exists or not can be detected.
Description
Technical field
The present invention relates to the anti-theft electricity technology in the electric energy metrical, more specifically, is a kind of comparator circuit that is used for electric energy computation chip that can detect electricity filching behavior.
Background technology
Current, the status of the anti-theft electricity technology of electronic electric energy meter in the electric energy meter industry is more and more important, and the electric energy meter market in country variant, area is all requiring the anti-electricity-theft metering of electric energy meter in varying degrees.The stealing electricity phenomenon that people recognize and the type of anti-theft electricity technology are being on the increase, and all can work out corresponding anti-theft electricity technology at new electricity filching behavior every year.In the electric energy computation chip field, correspondingly require chip to have anti-electricity-theft detection and function of measuring.
Compare with three-phase electric energy meter, single-phase electric energy meter is paid attention to the anti-theft electricity technology of electric energy meter more.Fig. 1 is not for designing the simple single-phase electric energy table model synoptic diagram of anti-stealing electricity function, and it only can measure the current signal of live wire and the voltage signal of electric energy meter end of incoming cables, even and be helpless for very simple electricity filching behavior yet.
Usually current imbalance is presented as the ground connection pattern, and in fact current imbalance comprises the unbalanced situation of the resulting load current of measurement of any live wire and zero line.Stealing may be the bypass segment electric current, causes the measured value of ammeter less than actual value.As shown in Figure 2, electricity filching person may be thrown the terminals of ammeter with simple metal wedge 3 into, and this electricity filching behavior ratio is easier to implement.When meter reading was chargeed, electricity filching person can remove the metal wedge 3 of by-pass current in several seconds, so be difficult to detect this stealing mode.
Publication No. is CN102749502A, and denomination of invention discloses a kind of double-current comparator circuit that can be used for anti-electricity-theft monitoring for the application for a patent for invention of " the double-current comparator circuit that is used for electric energy computation chip ".This double-current comparator circuit can apply in the electric energy computation chip.This double-current comparator circuit comprises two signal sampling modules, be used for respectively live wire current signal and neutral line current signal being sampled, then respectively by high-pass filtering and Integral Processing, entering comparison module compares, comparative result being conveyed into a threshold value comparer and predetermined threshold compares again, thereby the uneven degree of monitoring two-way electric current has judged whether that electricity filching behavior takes place.
As shown in Figure 3, be a kind of application example of this kind electric energy computation chip.As shown in the figure, ammeter needs the extra current transformer 4 that increases, to realize the current detecting of zero line; Owing to isolating reason, can select copper-manganese resistance cheaply for use at the current channel of the first via, but another road just must the higher relatively current transformer of use cost.In Fig. 3, the electric energy computation chip 2 in the electronic electric energy meter 1 measures simultaneously through the live wire electric current of copper-manganese resistance sampling with through the neutral line current of current transformer sampling.Under normal circumstances, leakage current is very little, so electric current basically identical in live wire loop and zero line loop, preset the percent value n of the stealing of two current channels can for electric energy computation chip 2, when the difference of two current values during greater than default percent value n, electric energy computation chip 2 is judged the current imbalance of two current channels, and showing has electricity filching behavior to take place.
In addition, Granted publication number discloses a kind of double-current effective value comparator circuit for the utility model patent of CN201589801U, different with foregoing circuit is, this circuit carries out effective value calculating to the live wire current signal after the sampling and neutral line current signal respectively, then two kinds of watt current signals are compared, and carry difference to the threshold value comparer, and judge based on above-mentioned percent value whether electric current is uneven, take place to have judged whether electricity filching behavior.
Summary of the invention
Purpose of the present invention is existing circuit with anti-stealing electricity function is improved, thereby a kind of new comparator circuit that is used for electric energy computation chip is provided.
In one aspect of the invention, should be used for the comparator circuit of electric energy computation chip, comprise:
The first current signal sampling module, it is used for the live wire current signal of outside input is sampled and is converted to the first sample rate current signal of digital signal form;
The second current signal sampling module, it is used for the neutral line current signal of outside input is sampled and is converted to the second sample rate current signal of digital signal form;
The voltage signal sampling module, it is used for the voltage signal of outside input is sampled and is converted to the sampled voltage signal of digital signal form;
The first active power module that is connected with this voltage signal sampling module with this first current signal sampling module respectively, it is used for receiving this first sample rate current signal and this sampled voltage signal, and to the processing of multiplying each other of this first sample rate current signal and this sampled voltage signal, obtain the first active power value;
The second active power module that is connected with this voltage signal sampling module with this second current signal sampling module respectively, it is used for receiving this second sample rate current signal and this sampled voltage signal, and to the processing of multiplying each other of this second sample rate current signal and this sampled voltage signal, obtain the second active power value;
The comparison module that is connected with this second active power module with this first active power module respectively, it is used for this first active power value and this second active power value are compared, and exports the power difference between this first active power value and this second active power value;
The threshold value comparison module that is connected with this comparison module, it be used for to receive the power difference of this comparison module output, and relatively this power difference and predetermined threshold;
With the timing module that this threshold value comparison module is connected, it is used for when this power difference is all the time greater than this predetermined threshold in the given time, to uneven indicator signal of this threshold value comparison module feedback.
Preferably, when described power difference during greater than this predetermined threshold, start described timing module, and:
After described timing module starts, when described power difference is not more than this predetermined threshold in the described schedule time, the described timing module of zero clearing;
After described timing module starts, when described power difference is constantly greater than this predetermined threshold in the described schedule time, feed back described uneven indicator signal to this threshold value comparison module, and the described timing module of zero clearing.
In another aspect of the present invention, should be used for the comparator circuit of electric energy computation chip, comprising:
The first current signal sampling module, it is used for the live wire current signal of outside input is sampled and is converted to the first sample rate current signal of digital signal form;
The second current signal sampling module, it is used for the neutral line current signal of outside input is sampled and is converted to the second sample rate current signal of digital signal form;
The voltage signal sampling module, it is used for the voltage signal of outside input is sampled and is converted to the sampled voltage signal of digital signal form;
The first current effective value module that is connected with this first current signal sampling module is used for that this first sample rate current signal is carried out effective value and calculates, and exports first current effective value;
The second current effective value module that is connected with this second current signal sampling module is used for that this second sample rate current signal is carried out effective value and calculates, and exports second current effective value;
The first active power module that is connected with this voltage signal sampling module with this first current signal sampling module respectively, it is used for receiving this first sample rate current signal and this sampled voltage signal, and to the processing of multiplying each other of this first sample rate current signal and this sampled voltage signal, obtain the first active power value;
The second active power module that is connected with this voltage signal sampling module with this second current signal sampling module respectively, it is used for receiving this second sample rate current signal and this sampled voltage signal, and to the processing of multiplying each other of this second sample rate current signal and this sampled voltage signal, obtain the second active power value;
Comparison module, this comparison module comprise first comparison module and second comparison module, wherein,
This first comparison module is connected with this second current effective value module with this first current effective value module respectively, it is used for this first current effective value and this second current effective value are compared, and exports the current effective value difference between this first current effective value and this second current effective value;
This second comparison module is connected with this second active power module with this first active power module respectively, it is used for this first active power value and this second active power value are compared, and exports the power difference between this first active power value and this second active power value;
Threshold value comparison module, this threshold value comparison module comprise first threshold comparison module and the second threshold value comparison module, wherein,
This first threshold comparison module is connected with this first comparison module, and it be used for to receive the current effective value difference of this first comparison module output, and relatively this current effective value difference and scheduled current effective value threshold value;
This second threshold value comparison module is connected with this second comparison module, and it be used for to receive the power difference of this second comparison module output, and relatively this power difference and predetermined threshold;
The timing module that is connected with this threshold value comparison module, it is used for when this current effective value difference is all the time greater than this scheduled current effective value threshold value in the given time, to uneven indicator signal of this threshold value comparison module feedback, and be used for when this power difference is all the time greater than this predetermined threshold in the given time, feeding back this imbalance indicator signal to this threshold value comparison module;
The manner of comparison that is connected with this comparison module is selected module, is used for first comparison module and second comparison module are selected.
The present invention adopts the binary channels comparative structure of two kinds of alternative modes, can realize two detections of passage when imbalance, thereby whether detecting has electricity filching behavior to take place, guarantee that electric energy computation chip has anti-stealing electricity function, greatly reduce the ammeter manufacturing cost of anti-current imbalance stealing, provide maximum design flexibility to the user simultaneously, and whole binary channels comparative structure is simple in structure, is easy to realize.
Description of drawings
Fig. 1 is not for designing the simple single-phase electric energy table model synoptic diagram that anti-stealing electricity function is arranged;
Fig. 2 is for adopting the single-phase electric energy table model synoptic diagram of current imbalance electricity filching behavior;
Fig. 3 is the anti-electricity-theft single-phase electric energy table model synoptic diagram of anti-current imbalance electricity filching behavior in a kind of prior art;
Fig. 4 is the composition synoptic diagram of the comparator circuit that is used for electric energy computation chip of an embodiment of the invention;
Fig. 5 is the composition synoptic diagram of the comparator circuit that is used for electric energy computation chip of another embodiment of invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the structure of the comparator circuit for electric energy computation chip of the present invention is formed and principle of work is elaborated.
In conjunction with Fig. 3, in general, improved comparator circuit of the present invention can be used in the electric energy computation chip 2, and can receive live wire electric current, neutral line current and the voltage signal of ammeter again.Under normal circumstances, leakage current is very little, thus the electric current basically identical in live wire loop and zero line loop, and then also basically identical of the active power in two loops.When electricity filching behavior took place, the active power in two loops will create a difference.Therefore, a predeterminable power difference threshold when the difference of two active power during greater than this threshold value, then is judged as two current channel imbalances, and showing has electricity filching behavior to take place.Understand easily, this difference threshold can be an absolute difference amount with power unit, also can be preferably a nondimensional relative percentage amount.
Specifically with reference to figure 4, be the circuit diagram of an embodiment of the invention.As shown in the figure, this circuit comprises the first current signal sampling module 410, the second current signal sampling module 420, voltage signal sampling module 430, the first active power module 440, the second active power module 450, comparison module 460, threshold value comparison module 470 and timing module 480.
More specifically, in conjunction with Fig. 4, the first current signal sampling module 410 is used for the live wire current signal of outside input is sampled and is converted to the first sample rate current signal of digital signal form.
The second current signal sampling module 420 is used for the neutral line current signal of outside input is sampled and is converted to the second sample rate current signal of digital signal form.
The above-mentioned first current signal sampling module 410 and the second current signal sampling module 420 can adopt conventional current signal sample circuit that live wire current signal and neutral line current signal are sampled, and be converted to digital signal respectively, and then again digital signal separately is sent to the first active power module 440 and the second active power module 450 respectively.
Voltage signal sampling module 430 is used for the voltage signal of outside input is sampled and is converted to the sampled voltage signal of digital signal form.Voltage signal sampling module 430 can adopt conventional voltage signal sampling circuits built, after it carries out digital conversion with the voltage signal that samples, forms the sampled voltage signal, and is sent to the first active power module 440 and the second active power module 450.
The first active power module 440 is connected with voltage signal sampling module 430 with the first current signal sampling module 410 respectively, be used for receiving the first sample rate current signal and sampled voltage signal, and to the processing of multiplying each other of the first sample rate current signal and this sampled voltage signal, obtain the first active power value.The first active power module 440 can be conventional power calculation circuit, for example multiplier etc.
Similar with the first active power module 440, the second active power module 450 is connected with voltage signal sampling module 430 with the second current signal sampling module 420 respectively, be used for receiving the second sample rate current signal and sampled voltage signal, and to the processing of multiplying each other of the second sample rate current signal and this sampled voltage signal, obtain the second active power value.
Comparison module 460 is connected with the second active power module 450 with the first active power module 440 respectively, be used for the first active power value and the second active power value are compared, and export power difference between the first active power value and the second active power value.Comparison module 460 can adopt common comparator circuit to form.
Threshold value comparison module 470 is connected with comparison module 460, is used for receiving the power difference of comparison module output, and compares power difference and predetermined threshold.Threshold value comparison module 470 can comprise conventional subtraction circuit, and the comparative result that compares power difference and reservation threshold value can be sent to timing module 480 for starting or the zero clearing timing module.
Timing module 480 is connected with threshold value comparison module 470, is used for when this power difference is all the time greater than this predetermined threshold in the given time, to uneven indicator signal of threshold value comparison module 470 feedbacks.Timing module 480 is conventional timer, and it can start timing, stop timing or zero clearing under the control of threshold value comparison module 470.
Particularly, in a preferred embodiment of the present invention, when the power difference is not more than predetermined threshold, do not start timing module 480.And when power difference during greater than this predetermined threshold, start timing module 480, and: 1, after timing module 480 starts, when the power difference is not more than this predetermined threshold in the given time, then show and only be instantaneous current imbalance phenomenon, but not the electricity filching behavior generation, so timing module 480 zero clearings; Perhaps, 2, after timing module 480 starts, when the power difference is constantly greater than this predetermined threshold in the given time, then show current imbalance constantly, there is electricity filching behavior, so feed back described uneven indicator signal to this threshold value comparison module, and the described timing module of zero clearing, to detect again.After the threshold value comparison module receives uneven indicator signal, can externally send this imbalance indicator signal by chip, sending mechanism can be pilot lamp, also can be other similar digital indicator.This imbalance indicator signal also can be received by controller chip, and finally is presented on the display interfaces.Understand easily, uneven indicator signal also can directly externally be sent by timing module 480.
Threshold value comparison module 470 and corresponding timing module 480 are set, and are for preventing the electricity filching behavior judgement that makes a mistake.In actual measurement, because various electricity consumption situation differences, can there be little difference in the active power of two-way, thus need preestablish a threshold value according to actual conditions, to guarantee the accurate judgement to current imbalance.And the setting of timing module 480 is the erroneous judgements that cause because of instantaneous current imbalance for preventing.
As shown in Figure 5, be another circuit diagram in the embodiment more preferably of the present invention.In this embodiment, on active power basis relatively, increased by two current effective value modules, and by the comparison to two current effective values, judged whether that the current imbalance situation takes place.The user can select module by manner of comparison, according to practical application, two kinds of comparison judgment models is selected.Similarly, for the comparison of current effective value, a predeterminable electric current difference threshold by the difference of two-way electric current (live wire electric current and neutral line current) effective value and the comparison of electric current difference threshold, has judged whether that electricity filching behavior takes place.Understand easily, the difference of this current effective value difference threshold and two-way current effective value can be the actual difference with current unit, also nondimensional percentage difference preferably.For example, can be according to practical application, it is a nondimensional percent value n that the current effective value difference threshold is set, and when the effective value difference of two-way electric current during greater than this percent value n, then judges the current imbalance of two current channels, showing has electricity filching behavior to take place.
Particularly, with reference to Fig. 5, in this embodiment, comparator circuit comprises the first current signal sampling module 510, the second current signal sampling module 520, voltage signal sampling module 530, the first current effective value module 542, the second current effective value module 544, the first active power module 552, the second active power module 554, comparison module 560, threshold value comparison module 570, timing module 580 and manner of comparison selection module 590.
Identical with above-mentioned embodiment, the first current signal sampling module 510 is used for the live wire current signal of outside input is sampled and is converted to the first sample rate current signal of digital signal form; The second current signal sampling module 520 is used for the neutral line current signal of outside input is sampled and is converted to the second sample rate current signal of digital signal form; Voltage signal sampling module 530 is used for the voltage signal of outside input is sampled and is converted to the sampled voltage signal of digital signal form.
The first current effective value module 542 is connected with the first current signal sampling module 510, is used for that the first sample rate current signal is carried out effective value and calculates, and export first current effective value; The second current effective value module 544 is connected with the second current signal sampling module 520, is used for that the second sample rate current signal is carried out effective value and calculates, and export second current effective value.The first current effective value module 542 and the second current effective value module 544 all can adopt existing effective value counting circuit to constitute.
Similar with above-mentioned embodiment, the first active power module 552 is connected with voltage signal sampling module 530 with the first current signal sampling module 510 respectively, be used for receiving the first sample rate current signal and sampled voltage signal, and to the processing of multiplying each other of the first sample rate current signal and sampled voltage signal, obtain the first active power value; The second active power module 554 is connected with voltage signal sampling module 530 with the second current signal sampling module 520 respectively, it is used for receiving the second sample rate current signal and sampled voltage signal, and to the processing of multiplying each other of the second sample rate current signal and sampled voltage signal, obtain the second active power value.
Threshold value comparison module 570 comprises first threshold comparison module 572 and the second threshold value comparison module 574, wherein, first threshold comparison module 572 is connected with first comparison module 562, be used for to receive the current effective value difference of first comparison module, 562 outputs, and relatively this current effective value difference and scheduled current effective value threshold value; The second threshold value comparison module 574 is connected with second comparison module 564, be used for to receive the power difference of second comparison module, 564 outputs, and relatively this power difference and predetermined threshold.As mentioned above, two threshold value comparison modules 572,574 can adopt conventional subtracter to constitute.
Manner of comparison selects module 590 to be connected with comparison module 560, is used for first comparison module 562 and second comparison module 564 are selected.Manner of comparison selects module 590 can adopt conventional selector switch to form.In an embodiment of the invention, it can be a register that communicates with comparison module 560 that manner of comparison is selected module 590, according to one or two selects the position in the register, determine only to open first comparison module, only open second comparison module or two comparison modules are opened simultaneously.For example, can arrange two in the register and select the position, during for " 01 ", select first comparison module 562, during for " 10 ", select second comparison module 564, during for " 11 ", select two comparison modules simultaneously.After one of them comparison module was selected, its corresponding threshold comparison module and timing module further carried out threshold ratio and current stabilization is judged.
In sum, the present invention adopts the binary channels comparative structure of two kinds of alternative modes, can realize two detections of passage when imbalance, thereby whether detecting has electricity filching behavior to take place, guarantee that electric energy computation chip has anti-stealing electricity function, greatly reduce the ammeter manufacturing cost of anti-current imbalance stealing, provide maximum design flexibility to the user simultaneously, and whole binary channels comparative structure is simple in structure, is easy to realize.
Claims (3)
1. a comparator circuit that is used for electric energy computation chip is characterized in that, comprising:
The first current signal sampling module, it is used for the live wire current signal of outside input is sampled and is converted to the first sample rate current signal of digital signal form;
The second current signal sampling module, it is used for the neutral line current signal of outside input is sampled and is converted to the second sample rate current signal of digital signal form;
The voltage signal sampling module, it is used for the voltage signal of outside input is sampled and is converted to the sampled voltage signal of digital signal form;
The first active power module that is connected with this voltage signal sampling module with this first current signal sampling module respectively, it is used for receiving this first sample rate current signal and this sampled voltage signal, and to the processing of multiplying each other of this first sample rate current signal and this sampled voltage signal, obtain the first active power value;
The second active power module that is connected with this voltage signal sampling module with this second current signal sampling module respectively, it is used for receiving this second sample rate current signal and this sampled voltage signal, and to the processing of multiplying each other of this second sample rate current signal and this sampled voltage signal, obtain the second active power value;
The comparison module that is connected with this second active power module with this first active power module respectively, it is used for this first active power value and this second active power value are compared, and exports the power difference between this first active power value and this second active power value;
The threshold value comparison module that is connected with this comparison module, it be used for to receive the power difference of this comparison module output, and relatively this power difference and predetermined threshold;
With the timing module that this threshold value comparison module is connected, it is used for when this power difference is all the time greater than this predetermined threshold in the given time, to uneven indicator signal of this threshold value comparison module feedback.
2. the comparator circuit for electric energy computation chip according to claim 1 is characterized in that,
When described power difference during greater than this predetermined threshold, start described timing module, and:
After described timing module starts, when described power difference is not more than this predetermined threshold in the described schedule time, the described timing module of zero clearing;
After described timing module starts, when described power difference is constantly greater than this predetermined threshold in the described schedule time, feed back described uneven indicator signal to this threshold value comparison module, and the described timing module of zero clearing.
3. a comparator circuit that is used for electric energy computation chip is characterized in that, comprising:
The first current signal sampling module, it is used for the live wire current signal of outside input is sampled and is converted to the first sample rate current signal of digital signal form;
The second current signal sampling module, it is used for the neutral line current signal of outside input is sampled and is converted to the second sample rate current signal of digital signal form;
The voltage signal sampling module, it is used for the voltage signal of outside input is sampled and is converted to the sampled voltage signal of digital signal form;
The first current effective value module that is connected with this first current signal sampling module is used for that this first sample rate current signal is carried out effective value and calculates, and exports first current effective value;
The second current effective value module that is connected with this second current signal sampling module is used for that this second sample rate current signal is carried out effective value and calculates, and exports second current effective value;
The first active power module that is connected with this voltage signal sampling module with this first current signal sampling module respectively, it is used for receiving this first sample rate current signal and this sampled voltage signal, and to the processing of multiplying each other of this first sample rate current signal and this sampled voltage signal, obtain the first active power value;
The second active power module that is connected with this voltage signal sampling module with this second current signal sampling module respectively, it is used for receiving this second sample rate current signal and this sampled voltage signal, and to the processing of multiplying each other of this second sample rate current signal and this sampled voltage signal, obtain the second active power value;
Comparison module, this comparison module comprise first comparison module and second comparison module, wherein,
This first comparison module is connected with this second current effective value module with this first current effective value module respectively, it is used for this first current effective value and this second current effective value are compared, and exports the current effective value difference between this first current effective value and this second current effective value;
This second comparison module is connected with this second active power module with this first active power module respectively, it is used for this first active power value and this second active power value are compared, and exports the power difference between this first active power value and this second active power value;
Threshold value comparison module, this threshold value comparison module comprise first threshold comparison module and the second threshold value comparison module, wherein,
This first threshold comparison module is connected with this first comparison module, and it be used for to receive the current effective value difference of this first comparison module output, and relatively this current effective value difference and scheduled current effective value threshold value;
This second threshold value comparison module is connected with this second comparison module, and it be used for to receive the power difference of this second comparison module output, and relatively this power difference and predetermined threshold;
The timing module that is connected with this threshold value comparison module, it is used for when this current effective value difference is all the time greater than this scheduled current effective value threshold value in the given time, to uneven indicator signal of this threshold value comparison module feedback, and be used for when this power difference is all the time greater than this predetermined threshold in the given time, feeding back this imbalance indicator signal to this threshold value comparison module;
The manner of comparison that is connected with this comparison module is selected module, is used for first comparison module and second comparison module are selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310202322XA CN103278679A (en) | 2013-05-27 | 2013-05-27 | Comparison circuit for electric energy measuring chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310202322XA CN103278679A (en) | 2013-05-27 | 2013-05-27 | Comparison circuit for electric energy measuring chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103278679A true CN103278679A (en) | 2013-09-04 |
Family
ID=49061254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310202322XA Pending CN103278679A (en) | 2013-05-27 | 2013-05-27 | Comparison circuit for electric energy measuring chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103278679A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459303A (en) * | 2014-12-24 | 2015-03-25 | 国家电网公司 | Double-bus self-adaption sampling line selection device |
| CN104635194A (en) * | 2013-11-08 | 2015-05-20 | 中国石油天然气股份有限公司 | Online fault monitoring and timing device for three-phase metering circuit |
| CN107576844A (en) * | 2017-07-24 | 2018-01-12 | 广东电网有限责任公司汕尾供电局 | A kind of method of opposing electricity-stealing for finding that user's single-phase electric meter measurent wiring is abnormal |
| CN109061263A (en) * | 2018-08-31 | 2018-12-21 | 宁波三星智能电气有限公司 | A kind of electrical energy meter anti-theft electricity method |
| CN109581014A (en) * | 2018-12-11 | 2019-04-05 | 宁波三星医疗电气股份有限公司 | A kind of electric energy meter line metering method off zero |
| CN110244257A (en) * | 2019-07-26 | 2019-09-17 | 华立科技股份有限公司 | The earth detector and method of electric energy meter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61284669A (en) * | 1985-06-12 | 1986-12-15 | Fuji Electric Co Ltd | Digital watthour meter |
| JP2000338149A (en) * | 1999-05-31 | 2000-12-08 | Mitsubishi Electric Corp | Electric power measuring device |
| JP2008175532A (en) * | 2007-01-16 | 2008-07-31 | Hioki Ee Corp | Electric power measuring apparatus |
| CN201589801U (en) * | 2009-12-02 | 2010-09-22 | 上海贝岭股份有限公司 | Double current effective values comparison circuit |
| CN102749502A (en) * | 2011-04-22 | 2012-10-24 | 上海贝岭股份有限公司 | Double-current comparison circuit for electric energy metering chip |
| CN102998525A (en) * | 2011-09-15 | 2013-03-27 | 无锡华润矽科微电子有限公司 | Multifunctional single-phase electric energy measuring circuit and automatic ammeter calibrating method thereof |
| CN203299249U (en) * | 2013-05-27 | 2013-11-20 | 上海贝岭股份有限公司 | Comparison circuit for electric energy metering chips |
-
2013
- 2013-05-27 CN CN201310202322XA patent/CN103278679A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61284669A (en) * | 1985-06-12 | 1986-12-15 | Fuji Electric Co Ltd | Digital watthour meter |
| JP2000338149A (en) * | 1999-05-31 | 2000-12-08 | Mitsubishi Electric Corp | Electric power measuring device |
| JP2008175532A (en) * | 2007-01-16 | 2008-07-31 | Hioki Ee Corp | Electric power measuring apparatus |
| CN201589801U (en) * | 2009-12-02 | 2010-09-22 | 上海贝岭股份有限公司 | Double current effective values comparison circuit |
| CN102749502A (en) * | 2011-04-22 | 2012-10-24 | 上海贝岭股份有限公司 | Double-current comparison circuit for electric energy metering chip |
| CN102998525A (en) * | 2011-09-15 | 2013-03-27 | 无锡华润矽科微电子有限公司 | Multifunctional single-phase electric energy measuring circuit and automatic ammeter calibrating method thereof |
| CN203299249U (en) * | 2013-05-27 | 2013-11-20 | 上海贝岭股份有限公司 | Comparison circuit for electric energy metering chips |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104635194A (en) * | 2013-11-08 | 2015-05-20 | 中国石油天然气股份有限公司 | Online fault monitoring and timing device for three-phase metering circuit |
| CN104635194B (en) * | 2013-11-08 | 2017-12-05 | 中国石油天然气股份有限公司 | A kind of three phase measuring loop on-line fault monitoring time set |
| CN104459303A (en) * | 2014-12-24 | 2015-03-25 | 国家电网公司 | Double-bus self-adaption sampling line selection device |
| CN104459303B (en) * | 2014-12-24 | 2016-06-01 | 国家电网公司 | A kind of adaptively sampled line selection apparatus of double-bus |
| CN107576844A (en) * | 2017-07-24 | 2018-01-12 | 广东电网有限责任公司汕尾供电局 | A kind of method of opposing electricity-stealing for finding that user's single-phase electric meter measurent wiring is abnormal |
| CN107576844B (en) * | 2017-07-24 | 2019-11-15 | 广东电网有限责任公司汕尾供电局 | A kind of method of opposing electricity-stealing finding user's single-phase electric meter measurent wiring exception |
| CN109061263A (en) * | 2018-08-31 | 2018-12-21 | 宁波三星智能电气有限公司 | A kind of electrical energy meter anti-theft electricity method |
| CN109581014A (en) * | 2018-12-11 | 2019-04-05 | 宁波三星医疗电气股份有限公司 | A kind of electric energy meter line metering method off zero |
| CN109581014B (en) * | 2018-12-11 | 2024-02-02 | 宁波三星医疗电气股份有限公司 | Method for measuring broken zero line of electric energy meter |
| CN110244257A (en) * | 2019-07-26 | 2019-09-17 | 华立科技股份有限公司 | The earth detector and method of electric energy meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103278679A (en) | Comparison circuit for electric energy measuring chip | |
| CN105807230B (en) | Remaining battery capacity and health status rapid detection method and device | |
| US20090261805A1 (en) | System and method for monitoring power in a utility meter | |
| CN102608404B (en) | Voltage sampling circuit and controller applicable to dual-power automatic transfer switch | |
| CN210982557U (en) | Electrical safety detection device and smart electric meter | |
| CN104350388A (en) | System and method for detecting branch circuit current | |
| CN103439587A (en) | Three-phase alternating current detecting method | |
| CN203811727U (en) | Device for detecting commercial power | |
| CN202631727U (en) | Onsite detector of electric energy metering device | |
| CN102944712A (en) | Multi-range automatic selection device of electronic type current transformer | |
| CN102323461A (en) | Unit multi-user intelligent electric energy meter box | |
| CN102749502B (en) | Double-current comparison circuit for electric energy metering chip | |
| CN102486533A (en) | LED switching power supply test device | |
| CN205608084U (en) | Single -phase single line metering circuit | |
| CN102364356B (en) | Electric energy meter applied load on-site anti-electricity-stealing detector and detection method | |
| CN203299249U (en) | Comparison circuit for electric energy metering chips | |
| CN105137268A (en) | Sampling circuit for residual current transformer | |
| CN201133914Y (en) | Electric energy metering chip double-current comparing structure | |
| CN201589801U (en) | Double current effective values comparison circuit | |
| CN205049679U (en) | Residual current transformer sampling circuit | |
| CN202075369U (en) | Circuit for detecting open and short circuit states of current transformer | |
| CN204287447U (en) | A kind of alternating current-direct current input detecting circuit | |
| CN101446599A (en) | Power management device with self-check function | |
| CN211426590U (en) | Anti-electricity-theft single-phase smart electric meter | |
| CN102012452B (en) | Method, device and circuit for detecting alternating voltage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130904 |