CN202693676U - Electric energy meter realizing power failure display - Google Patents
Electric energy meter realizing power failure display Download PDFInfo
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- CN202693676U CN202693676U CN 201120526160 CN201120526160U CN202693676U CN 202693676 U CN202693676 U CN 202693676U CN 201120526160 CN201120526160 CN 201120526160 CN 201120526160 U CN201120526160 U CN 201120526160U CN 202693676 U CN202693676 U CN 202693676U
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- microprocessor
- electric energy
- energy meter
- display unit
- chip
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Abstract
The utility model discloses an electric energy meter realizing power failure display. The electric energy meter comprises a microprocessor, a metering chip, a sampling circuit, a clock circuit, an electric meter state data processing unit and a display unit. The microprocessor is in communication connection with the metering chip, the sampling circuit, the clock circuit, the electric meter state data processing unit and the display unit, respectively. A power-grid live wire and a zero wire are connected to the sampling circuit, which performs sampling and analog-digital conversion of current and voltage signals. Converted digital signals are transmitted to the metering chip for metering purpose. Metering data is transmitted to the microprocessor by the metering chip and is processed. The clock chip is in communication connection with the microprocessor so as to realize a real-time clock. The electric meter state data processing unit monitors the electric meter state and the metering data and transmits the state information to the microprocessor. The metering data and the state information are transmitted to the display unit by the microprocessor and are displayed.
Description
Technical field
The utility model belongs to field of instrumentation technology, is specifically related to a kind of electric energy measurement instrument that still has demonstration when mains supply interrupts or have a power failure.
Background technology
Electric energy measurement instrument is for measuring resident residence, industrial and mining enterprises, commercial facility or other similar site measurement and the display device to the consumption of electric energy, and the electronic electric energy meter that occurs in recent years generally uses electronic circuit to measure, quantitatively and show power consumption information.Generally speaking, electric energy meter can be divided into two parts, Sensor section and metering sections.Sensor section is connected on the power lead of electric power network system.Voltage and current in the signal designation power lead that sensor device produces.Normally, the Sensor section of an electric energy meter is to move with the high voltage and the electric current that come across on the power lead.The signal that the metering section receiving sensor produces is to determine for example watt-hour (Wh), volt-ampere (VA), var (VAR) or other quantitative informations that consume.Metering section typically comprises several microprocessors (MCU) or digital signal processor, and the display that is used for the display power supply signal message.
Break down and produce when unstable at electric network source outage or power supply, digital signal processing circuit in the metering section can lose the power supply that obtains from (for example) AC network, this moment, this digital circuit just can not be carried out metering and the Presentation Function of general electronic electric energy meter, even may permanently lose the metrical information that is stored in the interior FLASH storage facilities of (for example) electric energy meter, or rate information etc.
Current, after deliberation or develop the technology that critical data in the time of will cutting off the power supply writes the nonvolatile memory of ammeter when detecting grid alternating current source power failure.CN201724981U discloses a kind of electric energy meter with readable memory data, some significant data can be stored in this storer when detecting power cut-off, thereby still can read the critical data in this storer when restoring electricity.
In addition, in most instrument battery is installed, in order to avoid produce such problem, to allow digital circuit operator scheme work to simplify when the grid power blackout, when grid cut-off, is allowed clock and other circuit to work on.But the battery open question is installed in ammeter is and when Power supply interrupts, only can make the ammeter can reading.Particularly the numeral of instrument for stopping driver from driving meter apparatus shows in order to conserve battery charge.Because show that relevant electrical source consumption is larger, the power-on time that the instrument display unit is not prolonged battery to a great extent for electric energy with numeral.
When interrupting, mains supply do not had dial plate or display to show, caused difficulty so just for meter reading personnel or maintainer, and residential neighborhoods must cut off the power supply to the electrical network user in some district when the electrical network overload operation, and in the suburb or other inclement conditions area, the situation of grid power blackout is more frequent and unpredictable, and this class area is comparatively abominable owing to condition, and required electric energy quantity delivered is often very large, can't the copy reading data can increase loss.
Therefore, need electric energy meter when grid power blackout, can normally show reading, can not rely on separately battery or similar power-supply unit to keep ammeter simultaneously and normally show.
Summary of the invention
The utility model proposes a kind of electronic electric energy meter of showing of when grid cut-off, still keeping, be intended to solve this type of defective that prior art exists.
A kind of electric energy meter of realizing having a power failure and showing, it is characterized in that: comprise microprocessor, computation chip, sample circuit, clock chip, ammeter status data processing unit and display unit, wherein said microprocessor communicates to connect respectively to computation chip, sample circuit, clock chip, ammeter status data processing unit and display unit, electrical network live wire and zero line access sample circuit, described sample circuit is to electric current and voltage signal is taken a sample and analog to digital conversion, and digital data transmission to the computation chip after the conversion is measured, and described computation chip transfers to microprocessor with continuous data and processes to carry out data, described clock chip communicate to connect to microprocessor to realize real-time clock, described ammeter status data processing unit is monitored electric energy meter state and continuous data, and with status information transmission to microprocessor, described microprocessor is used for continuous data and status information transmission to display unit to show.
As preferably, display unit is solid-state liquid crystal display.
As preferably, display unit comprises booster circuit and mu balanced circuit.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1 is the structural representation of the utility model electric energy meter;
Fig. 2 is the liquid crystal display circuit schematic diagram of the utility model electric energy meter.
Embodiment
With reference to Fig. 1, the utility model is a kind of still to keep the electronic electric energy meter that shows when grid cut-off, be preferably three phases electronic energy meter and comprise microprocessor 1, computation chip 2, sample circuit 3, clock chip 4, ammeter status data processing unit 5 and display unit 6, wherein microprocessor 1 communicates to connect respectively to computation chip 2, sample circuit 3, clock chip 4, ammeter status data processing unit 5 and display unit 6, electrical network live wire and zero line access sample circuit 3,3 couples of three-phase current I of sample circuit
a, I
b, I
cAnd voltage U
a, U
b, U
cSignal is taken a sample and analog to digital conversion, digital data transmission to computation chip 2 after the conversion is measured, computation chip 2 transfers to microprocessor 1 with continuous data and processes to carry out data, clock chip 4 communicate to connect to microprocessor 1 to realize real-time clock, 5 pairs of electric energy meter states of ammeter status data processing unit and continuous data are monitored, and with status information transmission to microprocessor 1, microprocessor 1 is used for continuous data and status information transmission to display unit 6 to show.
As preferably, display unit 6 further comprises booster circuit and mu balanced circuit.
Referring now to Fig. 2, display unit 6 of the present utility model is preferably solid-state liquid crystal display, has provided the display part circuit theory diagrams of liquid crystal display among the figure.As shown in the figure, V0R, V5R, V43R and V5R end are as the driving voltage end of the solid-state LCDs of LCD, and generally, driving voltage can be set by several resitstance voltage dividers R30, R31, R32 and R33, and the resistance of these resistance is preferably 20K Ω; VSS should guarantee VSS≤V5＜V43＜V12＜V0 as earth terminal under normal condition; VDD as and flogic system/device, the supply voltage end of microprocessor 1 or computation chip 2 for example, its voltage range is generally+2.5 to+5.5V, is preferably+5V; The FR end is as the AC signal input part of LCD display driver waveform, and input signal is by the conversion of flogic system voltage level to drive voltage level, controls this LCD circuit.Simultaneously, when using the AC signal generating circuit, the from then on terminal output of AC signal; EIO1 is as bi-directional shift register data input pin; LP is as bi-directional shift register shift clock pulse input end, and data are in the falling edge displacement of time clock; NDISPOFF is as a control input end, and it is connected to microprocessor 1, and when being set as level " L ", the LCD drive output is set as level V5; EIO2 is as bi-directional shift register shifted data output terminal; V5L, V43L, V12L and V0L generally should guarantee VSS≤V5＜V43＜V12＜V0 as the driving voltage end of LCD display; COM and SEG are as this LCD drive output, and similarly, driving voltage can be set by several resitstance voltage dividers R40, R41, R42 and R43, and the resistance of these resistance is preferably respectively 20K Ω and 620K Ω.
The clock chip of the utility model electric energy meter can be independent of microprocessor 1 work, and the not impact of acceptor's crystal oscillator and electric capacity thereof for example realizes per month power consumption, by date, time or measure respectively the different electricity charge and electric energy operating position by the classification of power consumption electrical equipment.Clock chip 4 can guarantee the timing accuracy of system's real-time clock under the powering-off state that primary power power down or other factors cause.Clock chip 4 for example is connected with parallel mode with microprocessor 1 interface, and data rate is very fast.
5 pairs of electric energy meter states of ammeter status data processing unit and continuous data are monitored, and with status information transmission to microprocessor 1, microprocessor 1 is used for continuous data and status information transmission to display unit 6 to show.In a kind of preferred embodiment of the present utility model, 5 pairs of computation chips 2 of ammeter status data processing unit detect, control computation chip 2 calculates the continuous data of the previous schedule time that has a power failure when grid power blackout, and be transferred to and be shown in solid-state liquid crystal display after microprocessor 1 is processed, the unit of this schedule time is preferably μ s.With this, the maintainer also can directly read the continuous data information of recording at last when having a power failure, and can not cause because of aforementioned drawback information dropout when grid power blackout.
Be preferred implementation of the present utility model only below, but should be appreciated that it is not restriction to technical solutions of the utility model.The three-phase electric energy meter that the utility model adopts only is interpretation technique content more comprehensively, can be applicable to more on the polymorphic type electric energy meter.All modifications of having done based on the utility model, variation or replacement scheme all should be covered by in the technology category that the utility model advocates.
Claims (3)
1. electric energy meter of realizing having a power failure and showing, be used for the electrical network electric weight is measured, it is characterized in that: comprise microprocessor (1), computation chip (2), sample circuit (3), clock chip (4), ammeter status data processing unit (5) and display unit (6), wherein said microprocessor (1) communicates to connect respectively to computation chip (2), sample circuit (3), clock chip (4), ammeter status data processing unit (5) and display unit (6), electrical network live wire and zero line access sample circuit (3), described sample circuit (3) is to electric current and voltage signal is taken a sample and analog to digital conversion, digital data transmission to computation chip (2) after the conversion is measured, described computation chip (2) transfers to microprocessor (1) with continuous data and processes to carry out data, described clock chip (4) communicate to connect to microprocessor (1) to realize real-time clock, described ammeter status data processing unit (5) is monitored electric energy meter state and continuous data, and with status information transmission to microprocessor (1), described microprocessor (1) with continuous data and status information transmission to display unit (6) in order to show.
2. the realization as claimed in claim 1 electric energy meter that has a power failure and show, it is characterized in that: described display unit (6) is solid-state liquid crystal display.
3. the realization as claimed in claim 1 electric energy meter that has a power failure and show, it is characterized in that: described display unit (6) comprises booster circuit and mu balanced circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120526160 CN202693676U (en) | 2011-12-15 | 2011-12-15 | Electric energy meter realizing power failure display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120526160 CN202693676U (en) | 2011-12-15 | 2011-12-15 | Electric energy meter realizing power failure display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202693676U true CN202693676U (en) | 2013-01-23 |
Family
ID=47549277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120526160 Expired - Fee Related CN202693676U (en) | 2011-12-15 | 2011-12-15 | Electric energy meter realizing power failure display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202693676U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301349A (en) * | 2015-09-22 | 2016-02-03 | 深圳市科陆电子科技股份有限公司 | Electric energy meter power outage display processing method |
| CN114217123A (en) * | 2021-11-03 | 2022-03-22 | 威胜集团有限公司 | Low-power-consumption display method and device, electric energy meter and computer-readable storage medium |
-
2011
- 2011-12-15 CN CN 201120526160 patent/CN202693676U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301349A (en) * | 2015-09-22 | 2016-02-03 | 深圳市科陆电子科技股份有限公司 | Electric energy meter power outage display processing method |
| CN114217123A (en) * | 2021-11-03 | 2022-03-22 | 威胜集团有限公司 | Low-power-consumption display method and device, electric energy meter and computer-readable storage medium |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20201215 |