CN106370928A - Electronic watt-hour meter and measuring method thereof - Google Patents
Electronic watt-hour meter and measuring method thereof Download PDFInfo
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- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
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- 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
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.
Priority Applications (1)
| 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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| 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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| Publication Number | Publication Date |
|---|---|
| CN106370928A true CN106370928A (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610727331.4A Pending CN106370928A (en) | 2016-08-25 | 2016-08-25 | Electronic watt-hour meter and measuring method thereof |
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| Country | Link |
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Cited By (2)
| 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 |
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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| 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 |