CN106370928A - Electronic watt-hour meter and measuring method thereof - Google Patents

Electronic watt-hour meter and measuring method thereof Download PDF

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Publication number
CN106370928A
CN106370928A CN201610727331.4A CN201610727331A CN106370928A CN 106370928 A CN106370928 A CN 106370928A CN 201610727331 A CN201610727331 A CN 201610727331A CN 106370928 A CN106370928 A CN 106370928A
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China
Prior art keywords
value
actual
transformer
voltage
actual power
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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
Application number
CN201610727331.4A
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Chinese (zh)
Inventor
娄震旦
刘春华
张玉清
冯发侨
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SHENZHEN STAR INSTRUMENT CO Ltd
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SHENZHEN STAR INSTRUMENT CO Ltd
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Priority to CN201610727331.4A priority Critical patent/CN106370928A/en
Publication of CN106370928A publication Critical patent/CN106370928A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R22/00Arrangements for measuring time integral of electric power or current, e.g. electricity meters
    • G01R22/06Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
    • G01R22/10Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

The invention provides an electronic watt-hour meter and a measuring method thereof. The electronic watt-hour meter comprises a current transformer, a voltage transformer and a central processing unit. The current transformer and the voltage transformer are externally connected with a tested circuit; and the central processing unit is connected with the current transformer and the voltage transformer. The central processing unit comprises an obtaining module, which is used for obtaining a measured value of the current transformer and a measured value of the voltage transformer; a conversion module, which is used for enabling the measured value of the current transformer to multiply variable ratio of the current transformer to obtain an actual current value, and enabling the measured value of the voltage transformer to multiply variable ratio of the voltage transformer to obtain an actual voltage value; a power calculation module, which is used for multiplying the actual current value and the actual voltage value to obtain an actual power value; and an electric energy calculation module, which is used for obtaining an actual electric energy value according to the actual power value. The actual electric energy value and the actual power value are calculated after converting the measured values of the current transformer and the voltage transformer into the actual values respectively through the central processing unit.

Description

Electronic electric meter and its measuring method
Technical field
The present invention relates to ammeter field, more particularly, to a kind of electronic electric meter and its measuring method.
Background technology
Traditional ammeter is ammeter for sensing, and its principle is: the faradic current phase in alternating magnetic field and moving part conductor Interaction and produce the Electromechanical indicating meters of rotating torque, but sensing is ammeter, and maximum shortcoming is that measurement range is little, because This, gradually replaced by electronic electricity meter.
Current electronic electricity meter typically adopts resistance sampling, and the such as Chinese patent of Publication No. cn 104808053 a provides A kind of electron watt-hour meter, is shown by current sampling circuit, voltage sampling circuit, power measurement circuit, single chip circuit, lcd Show circuit and power circuit composition.The sampling of the voltage and current of this electron watt-hour meter, all using resistance sampling, utilizes Hlw8012 single-phase electric energy computation chip measures active power, and application at89c2051 single-chip microcomputer carries out data processing, adopts Lcd1602 liquid crystal display shows the electricity consumption number of degrees of user.
But use resistance sampling, measurement range is still very restricted, therefore, research worker further provides logical Overvoltage transformer summation current transformer reduces the ammeter of tested voltage and current, then will be straight for the voltage and current after reducing Connect output display, or output display after multiplication.
But above-mentioned ammeter adopts voltage transformer summation current transformer to sample, the result finally recording and actual power consumption Have differences, such as actual power consumption is 10000 watts, total no-load voltage ratio of voltage transformer summation current transformer is 1000, then record Result be only 10 watts.Under common 220v civil power, the result measured using this ammeter is perhaps also differed not with actual power consumption Greatly, but in some special scenes, the environment that such as 10000v powers, above-mentioned ammeter cannot be suitable for.
Content of the invention
The technical problem to be solved is: a kind of electronic electric meter and its measuring method are provided, can be truly straight That sees reflects actual electricity in real time.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is:
A kind of electronic electric meter, including current transformer and voltage transformer, described current transformer and voltage transformer External circuit-under-test;Also include: CPU;Described CPU is mutual with described current transformer and voltage respectively Sensor electrically connects;Described CPU includes:
Acquisition module, for obtaining the measured value of current transformer and the measured value of voltage transformer;
Conversion module, obtains reality for the measured value of current transformer is multiplied with the change ratio of described current transformer Current value;The measured value of voltage transformer is multiplied with the change ratio of described voltage transformer and obtains actual voltage value;
Power computation module, for by mutually multiplied with actual voltage value for described actual current value actual power value;
Electric energy computing module, for being worth to actual power value according to described actual power.
Another technical scheme that the present invention provides is:
A kind of measuring method of above-mentioned electronic electric meter, comprising:
Obtain the measured value of current transformer and the measured value of voltage transformer;
The measured value of current transformer is multiplied with the change ratio of described current transformer and obtains actual current value;
The measured value of voltage transformer is multiplied with the change ratio of described voltage transformer and obtains actual voltage value;
By mutually multiplied with actual voltage value for described actual current value actual power value;
It is worth to actual power value according to described actual power.
The beneficial effects of the present invention is:
(1) above-mentioned electronic electric meter, CPU also includes a conversion module, to the measured value of current transformer and The measured value of voltage transformer is converted, and the electric current after being reduced by current transformer and voltage transformer and voltage are reduced into Actual numerical value, then power and electric energy are calculated.User directly can read actual electricity from this electronic electric meter, has Once reading, the advantage without manual conversion.
(2) above-mentioned measuring method, is different from prior art, first by the survey of the measured value of current transformer and voltage transformer Value is converted into current value and the magnitude of voltage of reality, further according to the current value after conversion and magnitude of voltage calculated power value and energy value Deng the result finally calculating is all the electricity of actual generation;User can directly read, and need not carry out manual conversion, pole again The earth improves the experience of user and the convenience of use.
Brief description
Fig. 1 is the structural representation of the electronic electric meter of the embodiment of the present invention;
Fig. 2 is the schematic flow sheet of the measuring method of the embodiment of the present invention;
Fig. 3 is the structural representation of the electronic electric meter of the embodiment of the present invention one;
Fig. 4 is the exemplary plot in kind of the present invention one electronic electric meter;
Fig. 5 is the schematic flow sheet of the measuring method of the embodiment of the present invention two.
Label declaration:
1st, current transformer;2nd, voltage transformer;3rd, CPU;31st, acquisition module, 32, conversion module, 33, Power computation module;34th, electric energy computing module;4th, clock unit;5th, display screen;6th, arranging unit;7th, display lamp.
Specific embodiment
By describing the technology contents of the present invention in detail, being realized purpose and effect, below in conjunction with embodiment and coordinate attached Figure is explained.
The design of most critical of the present invention is: by the change ratio phase of the measured value of current transformer and this current transformer Take advantage of, the measured value of voltage transformer is multiplied with the change ratio of this voltage transformer, carries out the meter of performance number, energy value afterwards again Calculate, obtain the charge value of reality.
Refer to Fig. 1, the present invention provides a kind of electronic electric meter, including current transformer 1 and voltage transformer 2, described Current transformer 1 and the external circuit-under-test of voltage transformer 2;Also include: CPU 3;3 points of described CPU Do not electrically connect with described current transformer 1 and voltage transformer 2;Described CPU 3 includes:
Acquisition module 31, for obtaining the measured value of current transformer and the measured value of voltage transformer;
Conversion module 32, obtains reality for the measured value of current transformer is multiplied with the change ratio of described current transformer Border current value;The measured value of voltage transformer is multiplied with the change ratio of described voltage transformer and obtains actual voltage value;
Power computation module 33, for by mutually multiplied with actual voltage value for described actual current value actual power value;
Electric energy computing module 34, for being worth to actual power value according to described actual power.
Knowable to foregoing description, the having the beneficial effects that of the electronic electric meter of the present invention: distinguish existing kilowatt-hour meter, user In addition it is also necessary to exclusively carry out manual conversion or using special computed in software after reading data;The electronic electric meter of the present invention, uses The electricity consumption situation of oneself reality can be intuitively read at family,
Further, also include clock unit 4, described clock unit 4 is electrically connected with shown CPU 3, described Electric energy computing module 34 will be mutually multiplied with the timing result of clock unit 4 for calculated for power computation module 33 actual power value To actual power.
Knowable to foregoing description, by clock unit timing, the time of recorded electronic kilowatt-hour meter, such as, this electronics electric degree Table be from January 10 point start to come into operation, be currently 0 point of January 2, then timing result is 24 hours, then by timing result with Actual power value is multiplied and can get 0 point of January 1 to 0 point of actual power value of January 2.
Further, also include display screen 5, described display screen 5 is electrically connected with CPU 3, and described display screen 5 is used In the described actual current value of display, actual voltage value, actual power value and actual power value.
Knowable to foregoing description, user passes through to read the numerical value on display screen, you can learn actual electricity consumption situation.
Further, also include arranging unit 6, described arranging unit 6 is electrically connected with CPU 3, for foundation Described current transformer 1 and the integer figure and the decimal digits that become ratio setting display result of voltage transformer 2.
Integer and the decimal digits of display result, knowable to foregoing description, can be set by arranging unit, such as at most only 8 digits can be shown, ratio is larger when becoming, when that is, actual charge value is larger, the setting relatively integer of multidigit (as 7) and less position Decimal (as 1);When becoming, ratio is less, then can arrange the integer of less bits (as 4) and the little of relatively (as 4) of multidigit Number;For different types of electricity, also different integers and decimal digits can be set, such as to be shown as 6 integers+2 little for electric energy Number;Power is shown as+4 decimals of 4 integers.
Further, also include display lamp 7, described display lamp 7 is electrically connected with CPU 3, for indicating each Unit or module whether normal work.
Knowable to foregoing description, by the working condition of display lamp instruction module and unit, such as current transformer damages, No measurement signal sends, and display lamp flashes;Display lamp small volume, easily realize naturally it is also possible to using voice guard etc. its His alarm device.
Refer to Fig. 2, another scheme of the present invention is:
A kind of measuring method of above-mentioned electronic electric meter, comprising:
Obtain the measured value of current transformer and the measured value of voltage transformer;
The measured value of current transformer is multiplied with the change ratio of described current transformer and obtains actual current value;
The measured value of voltage transformer is multiplied with the change ratio of described voltage transformer and obtains actual voltage value;
By mutually multiplied with actual voltage value for described actual current value actual power value;
It is worth to actual power value according to described actual power.
Knowable to foregoing description, the having the beneficial effects that of measuring method of the present invention: to current transformer and voltage transformer Measured value be converted into actual value after, calculate actual power value and actual power value;User can by directly reading measured value, Learn the actual electricity consumption situation of oneself, without manual conversion.
Further, start to start timing while measurement, be worth to actual power value according to described actual power concrete For:
Obtain actual power value according to described actual power value and timing result.
Knowable to foregoing description, the electricity consumption time is able to know that by timing, energy value can be calculated in conjunction with performance number.
Further, after obtaining actual power value according to described actual power value and timing result, further include:
Described actual current value, actual voltage value, actual power value and actual power value are carried out numerical monitor.
Knowable to foregoing description, after numerical monitor, user can intuitively read measurement result, it would however also be possible to employ traditional Pointer such as shows at the mode, and the present invention is that one kind is more preferably selected using numerical monitor, because numerical monitor is clearer and convenient Read.
Further, according to the integer figure becoming ratio setting display result of described current transformer and voltage transformer And decimal digits.
Knowable to foregoing description, generally, if the current transformer that needs of circuit-under-test and voltage transformer Become ratio bigger, illustrate that the actual electricity of circuit-under-test is bigger, can be big according to the change ratio of voltage transformer summation current transformer Little, the different result display patterns of setting, such as, in the case that change ratio is less than 1, the form of setting display result is whole for 6 Number and 2 decimals, become ratio between 1 and 10, and the form of setting display result is 7 integers and 1 decimal.
Further, if abnormal signal is detected, report to the police.
Knowable to foregoing description, if current transformer, voltage transformer occur, and damage etc. is abnormal it is impossible to normal measure electricity Stream and voltage, then report to the police, to remind relevant staff to keep in repair in time.
Refer to Fig. 3, embodiments of the invention one are:
A kind of electronic electric meter, comprising: include current transformer 1 and voltage transformer 2, described current transformer 1 and electricity The pressure external circuit-under-test of transformer 2;Also include: CPU 3, clock unit 4, display screen 5, arranging unit 6 and instruction Lamp 7;Described CPU 3 respectively with current transformer 1, voltage transformer 2, clock unit 4, display screen 5, arranging unit 6 and display lamp 7 electrically connect;The change ratio setting that arranging unit 6 is used for according to described current transformer 1 and voltage transformer 2 is aobvious Show integer figure and the decimal digits of result;Described CPU 3 includes:
Acquisition module 31, for obtaining the measured value of current transformer and the measured value of voltage transformer;
Conversion module 32, obtains reality for the measured value of current transformer is multiplied with the change ratio of described current transformer Border current value;The measured value of voltage transformer is multiplied with the change ratio of described voltage transformer and obtains actual voltage value;
Power computation module 33, for by mutually multiplied with actual voltage value for described actual current value actual power value;
Electric energy computing module 34, for being worth to actual power value according to described actual power;
Display screen 5 is used for described actual current value, actual voltage value, actual power value and actual power to carrying out numeral Display.
Specifically the Setting pattern of above-mentioned arranging unit 6 is as shown in table 1 below with the relation becoming ratio:
Table 1
As shown in figure 4, being the specific electronic electric meter of the present invention one structural representation in kind, wherein a is display lamp, B is setting button, i.e. arranging unit;Clock unit is high-precision real clock, and this electronic electric meter also includes non-volatile memories Unit and the aobvious button of wheel, the aobvious button of wheel is the c in Fig. 4, all electrically connects with CPU, can store measurement result, wheel The charge value that aobvious button controllable current value, magnitude of voltage etc. respectively calculate shows in turn;Also include backup battery, be individually for high-precision Degree real-time clock (RTC) is powered.
Refer to Fig. 5, embodiments of the invention two are:
A kind of measuring method of the electronic electric meter of above-described embodiment one, comprising:
The integer figure and the decimal place that become ratio setting display result according to described current transformer and voltage transformer Number;
Timing in real time;Obtain the measured value of current transformer and the measured value of voltage transformer in real time;
The measured value of current transformer is multiplied with the change ratio of described current transformer and obtains actual current value;
The measured value of voltage transformer is multiplied with the change ratio of described voltage transformer and obtains actual voltage value;
By mutually multiplied with actual voltage value for described actual current value actual power value;
Timing result is multiplied with actual power value and obtains actual power value;
By described actual current value, actual voltage value, actual power value and actual power value according to the integer pre-setting Digit and decimal digits carry out numerical monitor;
Any of the above-described process, if abnormal signal or transmission abnormality situation, is reported to the police.
In sum, the present invention provides measuring method and electronic electric meter, can intuitively reflect the generation of reality Electricity;User only need to directly read display result, you can learns electricity consumption situation, need not carry out manual conversion again or by specific soft Part is calculated, and saves follow-up data processing step, drastically increases the experience of user.
The foregoing is only embodiments of the invention, not thereby limit the present invention the scope of the claims, every using this The equivalents that bright description and accompanying drawing content are made, or directly or indirectly it is used in the technical field of correlation, all include in the same manner In the scope of patent protection of the present invention.

Claims (10)

1. a kind of electronic electric meter, including current transformer and voltage transformer, outside described current transformer and voltage transformer Connect circuit-under-test;It is characterized in that, also include: CPU;Described CPU respectively with described Current Mutual Inductance Device and voltage transformer electrical connection;Described CPU includes:
Acquisition module, for obtaining the measured value of current transformer and the measured value of voltage transformer;
Conversion module, obtains actual current for the measured value of current transformer is multiplied with the change ratio of described current transformer Value;The measured value of voltage transformer is multiplied with the change ratio of described voltage transformer and obtains actual voltage value;
Power computation module, for by mutually multiplied with actual voltage value for described actual current value actual power value;
Electric energy computing module, for being worth to actual power value according to described actual power.
2. electronic electric meter according to claim 1 is it is characterised in that also include clock unit, described clock unit with The electrical connection of described CPU, described electric energy computing module by calculated for power computation module actual power value and when The timing result of clock unit is multiplied and obtains actual power value.
3. electronic electric meter according to claim 1 is it is characterised in that also include display screen, described display screen and central authorities Processing unit electrically connects, and described display screen is used for showing described actual current value, actual voltage value, actual power value and reality electricity Can value.
4. electronic electric meter according to claim 3 is it is characterised in that also include arranging unit, described arranging unit with CPU electrically connects, for showing the whole of result according to the ratio setting that becomes of described current transformer and voltage transformer Numerical digit number and decimal digits.
5. electronic electric meter according to claim 1 is it is characterised in that also include display lamp, described display lamp and central authorities Processing unit electrically connects, for indicating unit or module whether normal work.
6. a kind of measuring method of the electronic electric meter described in claim 1-5 any one is it is characterised in that include:
Obtain the measured value of current transformer and the measured value of voltage transformer;
The measured value of current transformer is multiplied with the change ratio of described current transformer and obtains actual current value;
The measured value of voltage transformer is multiplied with the change ratio of described voltage transformer and obtains actual voltage value;
By mutually multiplied with actual voltage value for described actual current value actual power value;
It is worth to actual power value according to described actual power.
7. measuring method according to claim 6 is it is characterised in that start to start timing, according to described while measurement Actual power be worth to actual power value particularly as follows:
Obtain actual power value according to described actual power value and timing result.
8. measuring method according to claim 6 is it is characterised in that obtain according to described actual power value and timing result After actual power value, further include:
Described actual current value, actual voltage value, actual power value and actual power value are carried out numerical monitor.
9. measuring method according to claim 8 is it is characterised in that according to described current transformer and voltage transformer Become integer figure and the decimal digits of ratio setting display result.
If 10. measuring method according to claim 6, it is characterised in that abnormal signal is detected, is reported to the police.
CN201610727331.4A 2016-08-25 2016-08-25 Electronic watt-hour meter and measuring method thereof Pending CN106370928A (en)

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Application Number Priority Date Filing Date Title
CN201610727331.4A CN106370928A (en) 2016-08-25 2016-08-25 Electronic watt-hour meter and measuring method thereof

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CN106370928A true CN106370928A (en) 2017-02-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112014635A (en) * 2020-09-04 2020-12-01 南方电网科学研究院有限责任公司 Electric automobile wireless charging electric energy metering method and device and charging pile
CN115835051A (en) * 2022-10-31 2023-03-21 武汉慧联无限科技有限公司 Method, device, processing equipment and storage medium for executing predetermined operation

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Publication number Priority date Publication date Assignee Title
JPH08226940A (en) * 1995-02-22 1996-09-03 Tokyo Electric Power Co Inc:The Electric energy sensor, and system for processing electric energy, voltage and current signals
CN2589997Y (en) * 2002-11-30 2003-12-03 施必华 Intelligent limit electric energy metering equipment
WO2011025345A1 (en) * 2009-08-31 2011-03-03 Kizikas, Saulius Multifunctional electric energy meter
CN102081118A (en) * 2010-12-10 2011-06-01 华北电力大学(保定) Real-time metering two-way communication intelligent ammeter
CN202256488U (en) * 2011-09-22 2012-05-30 苏州卡泰克电子科技有限公司 Intelligent household appliance multi-parameter measurement electricity meter for household energy consumption management
CN202522635U (en) * 2011-12-12 2012-11-07 徐贻钦 Comprehensive electrical parameter measuring device
CN104808053A (en) * 2015-05-18 2015-07-29 张新安 Electronic watt hour meter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08226940A (en) * 1995-02-22 1996-09-03 Tokyo Electric Power Co Inc:The Electric energy sensor, and system for processing electric energy, voltage and current signals
CN2589997Y (en) * 2002-11-30 2003-12-03 施必华 Intelligent limit electric energy metering equipment
WO2011025345A1 (en) * 2009-08-31 2011-03-03 Kizikas, Saulius Multifunctional electric energy meter
CN102081118A (en) * 2010-12-10 2011-06-01 华北电力大学(保定) Real-time metering two-way communication intelligent ammeter
CN202256488U (en) * 2011-09-22 2012-05-30 苏州卡泰克电子科技有限公司 Intelligent household appliance multi-parameter measurement electricity meter for household energy consumption management
CN202522635U (en) * 2011-12-12 2012-11-07 徐贻钦 Comprehensive electrical parameter measuring device
CN104808053A (en) * 2015-05-18 2015-07-29 张新安 Electronic watt hour meter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112014635A (en) * 2020-09-04 2020-12-01 南方电网科学研究院有限责任公司 Electric automobile wireless charging electric energy metering method and device and charging pile
CN115835051A (en) * 2022-10-31 2023-03-21 武汉慧联无限科技有限公司 Method, device, processing equipment and storage medium for executing predetermined operation
CN115835051B (en) * 2022-10-31 2023-09-29 武汉慧联无限科技有限公司 Method, apparatus, processing device and storage medium for performing predetermined operation

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Application publication date: 20170201