CN204214945U - A kind of electric energy meter accurately can measuring electric appliance standby energy consumption - Google Patents
A kind of electric energy meter accurately can measuring electric appliance standby energy consumption Download PDFInfo
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- CN204214945U CN204214945U CN201320815722.3U CN201320815722U CN204214945U CN 204214945 U CN204214945 U CN 204214945U CN 201320815722 U CN201320815722 U CN 201320815722U CN 204214945 U CN204214945 U CN 204214945U
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Abstract
The utility model discloses a kind of electric energy meter accurately can measuring electric appliance standby energy consumption, this electric energy meter is graded by phases line voltage sampling section, phase line current sampling section, neutral line current sampling section, metering section, central processor section, storage area, display section and Department of Communication Force and forms.Wherein, phase line current part adopts current transformer to carry out phase line current measurement, realize the electric energy metrical under electrical equipment is normally run, the amplifying circuit that neutral line current part adopts copper-manganese sheet to form in conjunction with three amplifiers, electric energy in electric appliance standby situation is measured, thus achieves the accurate measurement to the energy consumption under electrical equipment normal power supply and ideal case.
Description
Technical field
The present utility model relates to a kind of intelligent electric energy meter, particularly has the electric energy meter accurately measuring electric appliance standby energy consumption.
Background technology
Popularizing of a large amount of electronic product, various household electrical appliance are made to enter every family, people enjoy easily simultaneously, also have ignored the problem that electric equipment products power supply is not related to, create a large amount of standby energy consumptions, this not only increases the problem of electricity charge aspect to user, also exacerbate the anxiety of electric power resource simultaneously.Such as, after finishing watching TV, few people understand the power switch of closing television machine and Set Top Box.Show according to investigations, televisor is not related to power supply, also can power consumption 5-10 watt; Average power consumption per hour 43.06 watts when desktop computer is standby, if do not pull out power supply still power consumption per hour 12.34 watts after shutdown; The power consumption condition of not pulling out power supply after the shutdown such as sound appliances, electric fan and television decoder (Set Top Box) is respectively 3.91 watts, 3.38 watts and 1.56 watts.As can be seen here, electrical equipment is the used time not, timely powered-down, otherwise still can at consumption electric energy, and this not only causes the waste of electric energy, also can increase the electricity charge especially simultaneously.Therefore, a kind of an urgent demand is just become to the measurement of household electrical appliance standby energy consumption.
The proposition of the utility model patent, just can well solve this problem, can treat machine electric appliance power consumption by real-time prompting to user, thus effectively reminding user closes the Switching Power Supply of consumer in time, saves energy.
Summary of the invention
The utility model patent proposes a kind of new circuit structure, normally can measure under normal power supply He under outside power-off daily electrical equipment, based on the electric current that circuit structure can measure simultaneously two-way electric power signal according to existing computation chip, circuit voltage part adopts resistor voltage divider circuit to sample, and reduces cost of products; Circuit phase current part adopts copper-manganese sheet to carry out Direct Sampling, the sampling of copper-manganese sheet all has very strong advantage in starting current, the range of linearity, power consumption and precision etc., circuit neutral line current part is sampled by current transformer after adding three amplifier composition amplifiers, the effect of three amplifiers is exactly amplified by Weak current time standby, thus this small area analysis signal is transferred to computation chip through current transformer, thus complete the accurate measurement to standby energy consumption.Three amplifiers adopt three groups of series-parallel circuit of amplifier, Weak current in electric appliance standby situation can be accurately detected, current transformer adopts and meets IEC185 and GB GB1208-97 mutual inductor, utilize mutual inductor sample advantage be that anti-interference is stronger, circuit is simple, and measuring accuracy accurately and reliably.
The computation chip of the utility model patent adopts ATT7053A, and this computation chip dynamic range is large, and the dynamic range of nominal is 2000:1, can complete the metering to different electric current.Chip internal has two-way metering interface, wherein a road is connected with phase line current end, be used for measuring electric energy power consumption parameter when electrical equipment normally works, one tunnel connects with neutral line current end, be used for measuring the electric energy power consumption parameter under electric appliance standby work, finally, the supplemental characteristic that two-way measures is passed to central processor core.
The principle of the utility model patent is: electric energy meter measures electric current for foundation with phase line, judges whether to switch phase line, zero line measuring circuit: represent rated operational current when phase line measurement electric current is more than or equal to 5%Ib(Ib) time, using phase line current as measuring circuit; When phase line measurement electric current is less than 5%Ib, is switched to zero line and measures electric current as beasurement base.During big current duty, because neutral line current sampled signal is greater than sample range, so can not as normal measuring circuit, now, electric energy meter measures electric energy power consumption when electrical equipment normally runs.
The central processing unit of the utility model patent adopts NEC78F0526A, and this chip power-consumption is low, and stability is high, and antijamming capability is strong, and built-in AD, crystal oscillator, serial ports, power detecting, multiple timer etc., meet whole system control treatment needs.When electrical equipment normally runs, the phase line current information received from computation chip and current voltage information are processed, thus electric energy power consumption when showing that electrical equipment normally runs, when electric appliance standby, the neutral line current information received from computation chip and current voltage information are processed, thus energy consumption when accurately can draw electric appliance standby.Finally, electrical equipment normally to be run and the electric energy energy consumption of standby operation is stored to storage chip, for the process of outside display section, thus user can know easily electrical equipment normal and standby time accurate energy consumption, thus the accurate measurement achieved electrical equipment energy consumption, can the timely turning off standby power supply of real-time reminding user, saves energy.
Accompanying drawing explanation
Accompanying drawing 1 is the system chart of the utility model patent.
Accompanying drawing 2 is the phases line voltage sampling section circuit diagram of the utility model patent.
Accompanying drawing 3 is the phase line current sampling section circuit diagram of the utility model patent.
Accompanying drawing 4 is the neutral line current fractional-sample circuit diagram of the utility model patent.
Accompanying drawing 5 is the metering section circuit diagram of the utility model patent.
Embodiment
By reference to the accompanying drawings, book utility model patent is elaborated.
Accompanying drawing 1 is the system chart of the utility model patent, is made up of voltage sample, phase line current sampling, neutral line current sampling, computation chip, central processing unit, display section, storage area and communications portion.Wherein, voltage sample adopts electric resistance partial pressure mode external voltage to be divided to computation chip acceptable voltage range.Phase line current sampling and neutral line current are sampled and normally to be run electrical equipment respectively and electric current under ideal case is sampled.Computation chip processes after converting the voltage and current signal received to data available.Central processing unit carries out classified storage to computation chip data, meanwhile, plays management role to the running of whole electric energy meter.Storage area, display section and communications portion are all that conveniently user more directly can observe electrical equipment and normally runs and the electric energy of stand-by power consumption.
Accompanying drawing 2 is the phases line voltage fractional-sample circuit diagram of the utility model patent.External phases line voltage N_IN is after resistance R50, R51, R54, R140, R141, R142, R143, R144 and R145 step-down, be down to the operating voltage V3P that the chip ATT7053A that can be measured normally measures, electric capacity C43 is filter capacitor, removes the noise signal in voltage signal.
Accompanying drawing 3 is the phase line current sampling section circuit diagram of the utility model patent.The output pin 3 of current transformer J3 is split into acceptable current signal V2P by resistance R147 and R149 and inputs to computation chip electric current input channel, and pin 4 is reduced to the signal V2N of the chip acceptance that can be measured by resistance R148 and R150.Computation chip, by the process to V2P and V2N two signals, just can calculate electric energy power consumption when electrical equipment normally works.
Accompanying drawing 4 is the neutral line current sampling section circuit diagram of the utility model patent.From copper-manganese sheet J5 current signal out after C39 and C40 filtering, amplification process is carried out by A1, A2, A3 amplifier, A1, A2, A3 amplifier constitutes three amplifier amplifiers, the amplification can examined small area analysis and optimization process, make range of current within the scope of the input current of computation chip, thus the accurate measurement of electric energy under well realizing electric appliance standby situation.
Accompanying drawing 5 is the metering section circuit diagram of the utility model patent.Adopt high-precision the special metering IC ATT7053A.This chip is in the dynamic range of 2000:1, and measuring accuracy can reach 0.1%.Wherein, voltage carries out voltage sample by adopting the dividing potential drop mode of many resistant series such as resistance R4-R11, phase line current is sampled by copper-manganese sheet, and neutral line current is sampled by current transformer, thus completes the electric energy accurate measurement under and standby two states normal to electrical equipment.
The specific implementation process of the utility model patent is: when electrical equipment normally works, current signal V2P and V2N is computation chip normal operating voltage signal, system is normally run, and electric energy power consumption values is recorded, when electrical equipment is in stand-by operation, V2P and V2N signal reference value is lower than normal working signal, now, central processing unit judges that electrical equipment is in stand-by operation state, start neutral line current measuring parameter, computation chip measures current signal V3P and V3N from zero line, and the electric energy power consumption values after metering is stored, be convenient to user and inquire about the electric energy energy consumption of electrical equipment normally and under ideal case, thus the accurate measurement achieved electric appliance standby energy consumption.
Claims (2)
1. accurately can measure the electric energy meter of electric appliance standby energy consumption for one kind, it is characterized in that: neutral line current part accesses through copper-manganese sheet, after RC filtering, undertaken amplifying and optimization process by three amplifier amplifiers, eventually pass current transformer and receive computation chip, thus realize the accurate measurement to the energy consumption in electric appliance standby situation; Phase line current part adopts current transformer to carry out phase line current measurement, realizes the electric energy metrical under normally running electrical equipment.
2. electric energy meter as claimed in claim 1, it is characterized in that: described metering section adopts two-way metering, phase line and neutral line current can be measured simultaneously, wherein, phase line current adopts current transformer to measure, and the measurement of standby energy consumption adopts the circuit of three amplifier compositions, so just can be different according to consumer electronics electricity consumption situation, respectively accurate measurement, when electric current is greater than 10%Ib with phase line sample circuit for beasurement base, when electric current is less than 10%Ib with zero line sample circuit for beasurement base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320815722.3U CN204214945U (en) | 2013-12-13 | 2013-12-13 | A kind of electric energy meter accurately can measuring electric appliance standby energy consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320815722.3U CN204214945U (en) | 2013-12-13 | 2013-12-13 | A kind of electric energy meter accurately can measuring electric appliance standby energy consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204214945U true CN204214945U (en) | 2015-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320815722.3U Expired - Fee Related CN204214945U (en) | 2013-12-13 | 2013-12-13 | A kind of electric energy meter accurately can measuring electric appliance standby energy consumption |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204214945U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146740A (en) * | 2019-04-03 | 2019-08-20 | 国网浙江省电力有限公司 | A kind of household appliances energy consumption calculation system |
-
2013
- 2013-12-13 CN CN201320815722.3U patent/CN204214945U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146740A (en) * | 2019-04-03 | 2019-08-20 | 国网浙江省电力有限公司 | A kind of household appliances energy consumption calculation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150318 Termination date: 20151213 |
|
| EXPY | Termination of patent right or utility model |