CN105548685A - Electronic intelligent electric energy meter - Google Patents
Electronic intelligent electric energy meter Download PDFInfo
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- CN105548685A CN105548685A CN201510946205.3A CN201510946205A CN105548685A CN 105548685 A CN105548685 A CN 105548685A CN 201510946205 A CN201510946205 A CN 201510946205A CN 105548685 A CN105548685 A CN 105548685A
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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
Abstract
The invention discloses an electronic intelligent electric energy meter which comprises a front-end circuit conditioning module, an electric energy metering chip, an LED indication module, a micro control module, a display module, a communication module, a keyboard control module, a clock module, a memory and a power supply module, wherein the front-end circuit conditioning module is connected with the electric energy metering chip, the LED indication module is connected with the electric energy metering chip, the micro control unit is connected with the electric energy metering chip, and the display module, the communication module, the keyboard control module, the clock module and the memory are connected with the micro control module. The electric energy meter of the invention can be used to measure, display, collect and process electric parameters as the electric energy.
Description
Technical field:
The present invention relates to Electric Energy Metering Technology, in particular to a kind of electronic type intelligent electric energy meter.
Background technology:
In order to the Implement of sustainable development, solve the contradiction of environment and development, world many countries is trying to explore green energy resource to reduce the pollution of conventional Power Generation Mode to environment and the loss of non-renewable resources, or in order to reduce investment outlay, reduce energy consumption, improve security of system and dirigibility, adopt the power supply mode that bulk power system and distributed generation system combine.Design reasonably plan with power energy market through system science, distributed small-scale electric power system not only can solve resident energy problem and also can back electrical energy more than needed to electrical network, to realize repaying electricity with electricity, thus alleviate the burden of electric power system, reduce the consumption of non-renewable resources.
At present, the electricity generation system of many national regulation users oneself produces the electric energy that the electric energy be connected to the grid of equal value can exchange equivalent electrical network for.Although also do not come into effect in our country, this is a kind of developing direction.In order to meet this application needs, not only must design one can consume electric energy (forward electric energy) but also can feed back to the electric energy meter of the electric energy (i.e. reverse power) of electrical network, i.e. bidirectional power meter by metering user by metering user.
Summary of the invention:
Technical matters solved by the invention: the electricity generation system of user oneself produces the electric energy that the electric energy be connected to the grid of equal value can exchange equivalent electrical network for, so, one is needed can to consume electric energy (not only forward electric energy) but also the bidirectional power meter of the electric energy of electrical network can be fed back to by metering user by metering user.
The invention provides following technical scheme: a kind of electronic type intelligent electric energy meter, comprise power module, display module, LED indicating module, communication module, keyboard control module, micro-control unit, electric energy computation chip, clock module, storer and front-end circuit conditioning module.Described front-end circuit conditioning module is connected with electric energy computation chip, described LED indicating module is connected with electric energy computation chip, described micro-control unit is connected with electric energy computation chip, and described display module, communication module, keyboard control module, clock module, storer are connected with micro-control unit respectively.Described electric energy computation chip is CS5460A chip, and described display module (50) is chosen as LM32019TFW cake core, and described microcontroller is single-chip microcomputer or ARM.
By technique scheme, electronic type intelligent electric energy meter of the present invention forms primarily of power module, display module, LED indicating module, communication module, keyboard control module, MCU module, electric energy computation chip, clock module, memory module and front-end circuit conditioning module part.Preferred as one of the present invention, described front-end circuit conditioning module comprises electronic current type voltage transformer (VT), current transformer, precision resistance circuit.Electronic current type voltage transformer (VT), current transformer and precision resistance circuit transformations voltage and current signal receive electric energy computation chip with the form of differential mode voltage, the resistance of sample resistance is determined by the maximal value of measured signal, then after electric energy computation chip conversion, the signals such as voltage, electric current, power, electric energy are passed to micro-control unit, the display of the work of all chips of micro-control unit controls, cut-off and calculating and module.Display module normally showed when the energy value of pre-test, date, time.LED indicating module can indicate electric energy direction and electric power size.Communication module realizes electric energy meter telecommunication.Clock module provides time reference for electric energy meter, and lay the first stone for realizing many rates, memory module provides data to store for electric energy meter, can accomplish power down not obliterated data, can also realize the real time record of parameters of electric power system.
By electric energy meter of the present invention, the object to the electric parameter meterings such as electric energy, display and acquisition process can be realized.
As a further improvement on the present invention, described power module comprises power circuit, and described power circuit comprises power transformer, the bridge rectifier circuit be connected with power transformer, the fixed three terminal voltage regulator circuit be connected with bridge rectifier circuit, the three terminal voltage regulator circuit that is connected with fixed three terminal regulator.Power circuit is prerequisite and the key of whole electric energy meter energy steady operation, and the unit circuit in electric energy meter all needs to use DC power supply, and especially voltage transformer (VT) provides positive and negative 15V working power, ensures the smooth collection of voltage.The present invention adopts self-control Power supply mode, 220V electric main is transformed into AC low-tension by power transformer, again through bridge rectifier circuit rectification and filtering, a not very galvanic current pressure is formed at the two ends of fixed three terminal regulator, the voltage stabilizing of this DC voltage through three terminal regulator and the frequency compensation of electric capacity, just create at the output terminal of stabilized voltage supply the VD that precision is high, degree of stability is good.Obtain 15V, 5V, 3.3V direct supply, be mutual inductor, electric energy computation chip, the modules such as MCU provide stable working power.
Accompanying drawing illustrates:
Below in conjunction with accompanying drawing, the present invention is described further:
Fig. 1 is the structured flowchart of a kind of electronic type intelligent electric energy meter of the present invention;
Fig. 2 is the schematic diagram of the power circuit of the power module of electronic type intelligent electric energy meter of the present invention.
Symbol description in figure:
A-voltage signal;
B-current signal;
The voltage signal of C-after the conditioning of front-end circuit conditioning module;
The current signal of D-after the conditioning of front-end circuit conditioning module;
11-current mode voltage transformer (VT); 12-current transformer;
20-electric energy computation chip;
30-LED indicating module;
40-micro-control unit;
50-display module;
60-communication module;
70-keyboard control module;
80-clock module;
90-storer.
Embodiment:
As shown in Figure 1, a kind of electronic type intelligent electric energy meter, comprises front-end circuit conditioning module, electric energy computation chip 20, LED indicating module 30, micro-control unit 40, display module 50, communication module 60, keyboard control module 70, clock module 80, storer 90, power module.Described front-end circuit conditioning module is connected with electric energy computation chip 20, described LED indicating module 30 is connected with electric energy computation chip 20, described micro-control unit 40 is connected with electric energy computation chip 20, and described display module 50, communication module 60, keyboard control module 70, clock module 80, storer 90 are connected with micro-control unit 40 respectively.Described front-end circuit conditioning module comprises electronic current type voltage transformer (VT) 11, current transformer 12, precision resistance circuit.Described electric energy computation chip is CS5460A family chip, and described display module (50) is chosen as LM32019TFW cake core, and described microcontroller is single-chip microcomputer or ARM.
Wherein, electric energy computation chip 20 adopts CS5460A.Micro-control unit 40 is responsible for key-press input scanning, duty detects, the reading in, calculate and store of continuous data, the situ configuration of ammeter parameter and the Control on Communication etc. with the external world.Micro-control unit 40 preferably adopts MSP430F2274 single-chip microcomputer.Display module 50 adopts LCD12864 liquid crystal.Communication module 60 adopts serial ports asynchronous communication, uses RS-485 to do the communication module of interface standard.The DS1302 that clock module 80 adopts DALLAS company to release.Storer 90 adopts AT24C02 storage chip.
The present invention adopts self-control Power supply mode, 220V electric main is transformed into AC low-tension by power transformer, again through bridge rectifier circuit rectification and filtering, a not very galvanic current pressure is formed at the two ends of fixed three terminal regulator, the voltage stabilizing of this DC voltage through three terminal regulator and the frequency compensation of electric capacity, just create at the output terminal of stabilized voltage supply the VD that precision is high, degree of stability is good.Obtain 15V, 5V, 3.3V direct supply, be mutual inductor, electric energy computation chip, the modules such as MCU provide stable working power.Self-control power principle as shown in Figure 2.
For the front voltage conditioning part of system, we adopt New Active AC voltage transformer, and this mutual inductor is due to built in op amps, so measuring accuracy is high, this mutual inductor simultaneously can external capacitor, and compensating phase shift, can by phase shift compensation to≤15 °.Need for this voltage transformer (VT) provides positive and negative 15V working power simultaneously.Then obtain about 5V alternating voltage at secondary side, then obtain the input voltage of 131.6mv through precision resistance dividing potential drop, voltage signal can be provided for CS5460A, do not exceed the measurement range of chip.And add RC filter network to the preliminary filtering of signal, and add and put shake electric capacity protect IC.Current regulating part adopts the current transformer of no-load voltage ratio 2000:1, then through a precision resistance, current signal is transformed into voltage signal.And add RC filter network to the preliminary filtering of signal, and add and put shake electric capacity protect IC.Benefit after conversion surveys signal receives CS5460A input end of analog signal with the form of differential mode voltage.Due to the impact of mutual inductor angular difference, the phase shift of input signal may be caused, the error of power measurement is increased.And CS5460A has phase compensation function, the impact of mutual inductor angular difference greatly can be reduced.
Electric energy meter chip CS5460 is sent into by IIN+, IIN-, VIN+, VIN-interface through voltage signal C, the current signal D of modulate circuit conditioning, chip is through amplification, filtering, sampling, calculating, calculate instantaneous power, and calculate energy value, current effective value, voltage effective value according to the count cycle set in cycle count register, and by it stored in corresponding register, then single-chip microcomputer is by reading the energy value in corresponding registers, voltage effective value, current effective value with chip communication, and send and give liquid crystal display.The pulse that electric energy conversion can become to be directly proportional to electric energy by CS5460, is configured to forward electric energy by EOUT mouth and EDIR mouth and negative sense electrical energy pulse exports, so that the calibrating of electric energy meter, also can indicate electric energy direction.
The LED of two different colours is adopted to indicate electric energy direction and electricity consumption load, electric energy meter calibration after convenient.In order to protect LED, must on LED series limiting resistor.Because redness is different with green LED pressure drop, all current-limiting resistances difference to some extent.
Keyboard in keyboard control module 70 four buttons and four pull down resistors form simple keyboard, four buttons are connected with flat P2.4, P2.5, P2.6, P2.7 mouth of single-chip microcomputer respectively, after keyboard is pressed, corresponding mouth is dragged down as low level, and then the control realized single-chip microcomputer, at one's leisure, punctual regulating time and the more energy informations of lcd display etc. realize more function.
The present invention adopts the liquid crystal of serial line interface, and single-chip microcomputer passes through the serial port SIO of liquid crystal to liquid crystal register write order, and then realizes the control to liquid crystal display.
Above content is only better embodiment of the present invention, and for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, this description should not be construed as limitation of the present invention.
Claims (3)
1. an electronic type intelligent electric energy meter, comprise front-end circuit conditioning module, electric energy computation chip, LED indicating module, micro-control unit, display module, communication module, keyboard control module, clock module, storer, power module, it is characterized in that: described front-end circuit conditioning module is connected with electric energy computation chip, described LED indicating module is connected with electric energy computation chip, described micro-control unit is connected with electric energy computation chip, described display module, communication module, keyboard control module, clock module, storer is connected with micro-control unit respectively, described electric energy computation chip is RN8209G family chip, described display module is chosen as CS5460A cake core, described microcontroller is single-chip microcomputer or ARM, the DS1302 that clock module adopts DALLAS company to release.
2. a kind of electronic type intelligent electric energy meter as claimed in claim 1, is characterized in that: described front-end circuit conditioning module comprises electronic current type voltage transformer (VT), current transformer, precision resistance circuit.
3. a kind of electronic type intelligent electric energy meter as claimed in claim 1, it is characterized in that: described power module comprises power circuit, described power circuit comprises power transformer, the bridge rectifier circuit be connected with power transformer, the fixed three terminal voltage regulator circuit be connected with bridge rectifier circuit, the three terminal voltage regulator circuit that is connected with fixed three terminal voltage regulator circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510946205.3A CN105548685A (en) | 2015-12-15 | 2015-12-15 | Electronic intelligent electric energy meter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510946205.3A CN105548685A (en) | 2015-12-15 | 2015-12-15 | Electronic intelligent electric energy meter |
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| CN105548685A true CN105548685A (en) | 2016-05-04 |
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| CN201510946205.3A Pending CN105548685A (en) | 2015-12-15 | 2015-12-15 | Electronic intelligent electric energy meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199178A (en) * | 2016-07-20 | 2016-12-07 | 柳州六品科技有限公司 | A kind of metering separate intelligent electric energy meter resistant to common code interference |
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| CN204188704U (en) * | 2014-10-11 | 2015-03-04 | 苏州克兰兹电子科技有限公司 | A kind of electronic electric energy meter |
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2015
- 2015-12-15 CN CN201510946205.3A patent/CN105548685A/en active Pending
Patent Citations (7)
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| CN201215573Y (en) * | 2008-05-27 | 2009-04-01 | 长沙银海仪表电器有限公司 | Electric energy meter having safety protection function |
| CN101403773A (en) * | 2008-11-13 | 2009-04-08 | 北京航空航天大学 | Electric energy meter with WIFI communication function |
| WO2010102647A1 (en) * | 2009-03-09 | 2010-09-16 | Siemens Aktiengesellschaft | Electrical energy meter, monitoring system having at least one electrical energy meter, and method for operating a monitoring system |
| CN102830255A (en) * | 2012-08-23 | 2012-12-19 | 王金泽 | Smart electricity meter with function of monitoring and protecting power failure |
| CN203133163U (en) * | 2012-12-26 | 2013-08-14 | 广东浩迪创新科技有限公司 | Bidirectional-metering intelligent electric energy meter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199178A (en) * | 2016-07-20 | 2016-12-07 | 柳州六品科技有限公司 | A kind of metering separate intelligent electric energy meter resistant to common code interference |
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