CN201045621Y - Electric energy meter with power-off meter reading power supply device - Google Patents
Electric energy meter with power-off meter reading power supply device Download PDFInfo
- Publication number
- CN201045621Y CN201045621Y CNU2007200851235U CN200720085123U CN201045621Y CN 201045621 Y CN201045621 Y CN 201045621Y CN U2007200851235 U CNU2007200851235 U CN U2007200851235U CN 200720085123 U CN200720085123 U CN 200720085123U CN 201045621 Y CN201045621 Y CN 201045621Y
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Abstract
The utility model relates to a watt-hour meter with a power-off meter-reading power device, which comprises an electronic watt-hour meter measuring unit, a single chip microcomputer processing unit, an external power source and a liquid crystal displaying unit, wherein the power-off meter-reading power device is further arranged in the watt-hour meter and can read the watt-hour meter at the power-off instance. The utility model adopts the liquid crystal as the displaying device and the liquid crystal needs quite low current, thereby the utility model adopts a disposable battery as a backup power source when the watt-hour meter is power-off. The battery can only supply the power for the liquid crystal and cannot supply the power for other circuits, thereby saving the battery power when the external power source is power-off. The battery with 500mAh can continuously supply the power over three years.
Description
Technical field
The utility model belongs to a kind of electric energy metrical product, is a kind of electric energy meter of supply unit of checking meter that has a power failure that has specifically.
Background technology
Electronic electric energy meter in the market all needs the person of checking meter to check meter to the scene, if meet power failure, the person of checking meter can't be copied the reading of electric energy meter.The utility model patent that the applicant has authorized " power failure check meter formula the electronic electric energy meter " (patent No.: 200520097782.1), exist and the person of checking meter to carry magnet or the trouble of the card of checking meter though solved the problem that to copy the reading of electric energy meter after having a power failure.
Summary of the invention
The purpose of this utility model provides a kind ofly can still can copy the reading of electric energy meter under power-off condition, do not need again the person of checking meter carry magnet or the card of checking meter have an electric energy meter of supply unit of checking meter that has a power failure, to overcome above-mentioned deficiency.
To achieve these goals, the utility model is made of electronic electric energy meter metering units, single-chip microcomputer processing unit, external power source part and liquid crystal display, wherein in electric energy meter, also be provided with the power failure supply unit of checking meter, be characterized in: the supply unit of checking meter of having a power failure is made of battery, resistor R 1～R4, diode D1～D2 and NPN triode BG1～BG2, wherein:
The positive pole of a, battery links to each other with the emitter of triode BG2, and the negative pole of battery is connected with the base stage of triode BG1 and the collector of triode BG1 with resistor R 3 by resistor R 2 respectively;
The base stage of b, triode BG1 also links to each other with external power source part power supply output Vpp by resistor R 1, and the emitter of triode BG1 is connected with external power source part power supply output Vpp;
The base stage of c, triode BG2 links to each other with the collector of triode BG1 by resistor R 4, and the collector of triode BG2 is connected with the power end VDD of liquid crystal display;
D, external power source part power supply output Vpp provide power supply VCC for electric energy meter metering units and single-chip microcomputer processing unit by diode D1, and external power source part power supply output Vpp also is connected with the power end VDD of liquid crystal display by diode D2.
Because the utility model uses liquid crystal to need electric current very little as display device, so standby power supply when adopting disposable battery as the outside outage of electric energy meter, during the external power source outage, battery is not only given other circuit supply to the liquid crystal power supply, play the purpose of saving battery electric quantity, the sustainable power supply of battery of using 500mAh is more than 3 years.
Description of drawings
Fig. 1 is a theory diagram of the present utility model.
Check meter for the utility model the has a power failure schematic diagram of supply unit of Fig. 2.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Principle of work of the present utility model is: when civil power had electricity, Vpp was the operating voltage that external power source produces, and Vpp gives electric energy metrical unit, the power supply of single-chip microcomputer processing unit through diode D1, gives the liquid crystal display unit through diode D2; The on-off circuit conducting of forming by resistor R 1, R2,3, triode BG1 simultaneously, the on-off circuit that resistor R 4, triode BG2 form ends, and 3V battery BT is disconnected, not current sinking.When mains failure, the voltage of external power source part power supply output Vpp is 0, the on-off circuit of being made up of resistor R 1, R2,3, triode BG1 ends, the on-off circuit conducting that resistor R 4, triode BG2 form, battery BT gives the power supply of liquid crystal display unit, because electric energy metrical unit, the power supply of single-chip microcomputer processing unit are not given in the existence of diode D2,3V battery, reduce the current drain of battery greatly.
The content that is not described in detail in this instructions belongs to this area professional and technical personnel's known prior art.
Claims (1)
1. one kind has the electric energy meter of supply unit of checking meter that has a power failure, constitute by electronic electric energy meter metering units, single-chip microcomputer processing unit, external power source part and liquid crystal display, wherein in electric energy meter, also be provided with the power failure supply unit of checking meter, it is characterized in that: the supply unit of checking meter of having a power failure is made of battery, resistor R 1～R4, diode D1～D2 and NPN triode BG1～BG2, wherein:
The positive pole of a, battery links to each other with the emitter of triode BG2, and the negative pole of battery is connected with the base stage of triode BG1 and the collector of triode BG1 with resistor R 3 by resistor R 2 respectively;
The base stage of b, triode BG1 also links to each other with external power source part power supply output Vpp by resistor R 1, and the emitter of triode BG1 is connected with external power source part power supply output Vpp;
The base stage of c, triode BG2 links to each other with the collector of triode BG1 by resistor R 4, and the collector of triode BG2 is connected with the power end VDD of liquid crystal display;
D, external power source part power supply output Vpp provide power supply VCC for electric energy meter metering units and single-chip microcomputer processing unit by diode D1, and external power source part power supply output Vpp also is connected with the power end VDD of liquid crystal display by diode D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200851235U CN201045621Y (en) | 2007-06-07 | 2007-06-07 | Electric energy meter with power-off meter reading power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200851235U CN201045621Y (en) | 2007-06-07 | 2007-06-07 | Electric energy meter with power-off meter reading power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201045621Y true CN201045621Y (en) | 2008-04-09 |
Family
ID=39309089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200851235U Expired - Fee Related CN201045621Y (en) | 2007-06-07 | 2007-06-07 | Electric energy meter with power-off meter reading power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201045621Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338826A (en) * | 2011-06-17 | 2012-02-01 | 杭州炬华科技股份有限公司 | Three-phase intelligent electric energy meter with auxiliary power supply |
| CN102338823A (en) * | 2010-07-27 | 2012-02-01 | 深圳长城开发科技股份有限公司 | Power failure detection method and circuit for electric meter system |
| CN102426276A (en) * | 2011-09-22 | 2012-04-25 | 河南省电力公司南阳供电公司 | Fully electronic electric energy meter interruption meter reading device |
| CN102520241A (en) * | 2011-12-26 | 2012-06-27 | 武汉盛帆电子股份有限公司 | Three-phase charge-controlled electric energy meter based on resistance-capacitance voltage reduction and low-voltage direct-current/direct-current (DC/DC) power supply |
| CN103279044A (en) * | 2013-05-11 | 2013-09-04 | 兰如根 | Standby power-saving controller |
-
2007
- 2007-06-07 CN CNU2007200851235U patent/CN201045621Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338823A (en) * | 2010-07-27 | 2012-02-01 | 深圳长城开发科技股份有限公司 | Power failure detection method and circuit for electric meter system |
| CN102338823B (en) * | 2010-07-27 | 2015-08-26 | 深圳长城开发科技股份有限公司 | The power failure detection method of electric meter system and circuit |
| CN102338826A (en) * | 2011-06-17 | 2012-02-01 | 杭州炬华科技股份有限公司 | Three-phase intelligent electric energy meter with auxiliary power supply |
| CN102426276A (en) * | 2011-09-22 | 2012-04-25 | 河南省电力公司南阳供电公司 | Fully electronic electric energy meter interruption meter reading device |
| CN102520241A (en) * | 2011-12-26 | 2012-06-27 | 武汉盛帆电子股份有限公司 | Three-phase charge-controlled electric energy meter based on resistance-capacitance voltage reduction and low-voltage direct-current/direct-current (DC/DC) power supply |
| CN102520241B (en) * | 2011-12-26 | 2014-07-02 | 武汉盛帆电子股份有限公司 | Three-phase charge-controlled electric energy meter based on resistance-capacitance voltage reduction and low-voltage direct-current/direct-current (DC/DC) power supply |
| CN103279044A (en) * | 2013-05-11 | 2013-09-04 | 兰如根 | Standby power-saving controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080409 |