CN105675977A - Electric energy meter and method for pre-stage and post-stage stage power failure detection and control of power switching-off by magnetic latching relay and data storage - Google Patents
Electric energy meter and method for pre-stage and post-stage stage power failure detection and control of power switching-off by magnetic latching relay and data storage Download PDFInfo
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- CN105675977A CN105675977A CN201610117185.3A CN201610117185A CN105675977A CN 105675977 A CN105675977 A CN 105675977A CN 201610117185 A CN201610117185 A CN 201610117185A CN 105675977 A CN105675977 A CN 105675977A
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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
- G01R22/061—Details of electronic electricity meters
Abstract
The invention relates to an electric energy meter and method for pre-stage and post-stage stage power failure detection and control of power switching-off by a magnetic latching relay and data storage. The electric energy meter comprises a power supply module and a control module. The power supply module consists of a pre-stage detection unit and a rectification voltage-dividing unit. The control module includes a post-stage detection unit, a data storage unit, a relay unit, a single-chip microcomputer and a metering unit. The pre-stage detection unit, the rectification voltage-dividing unit, the post-stage detection unit, the data storage unit, the relay unit, and the metering unit connected with corresponding signal terminals of the single-chip microcomputer. According to the invention, power failure information can be captured correctly and immediately at the moment of power failure occurrence; and thus power switching-off by a magnetic latching relay and data storage can be controlled with enough energy, so that the data storage becomes secure and the cost of pure post-stage detection can be lowered. Therefore, the electric energy meter and method have broad application prospects.
Description
Technical field
The invention belongs to electric energy table fall electricity operate a switch and data preserve field, be specifically related to a kind of front stage detection of power loss and control magnetic latching relay operate a switch with data preserve electric energy table.
Background technology
At present, market is killed the electricity electric energy table preserved with data of operating a switch has simple detection rear class to fall electricity, also has and sends power-fail interrupt by computation chip. Simple detection rear class fall electricity in order to operate a switch falling electricity control rly. and preserve data, a lot of electric capacity must be increased in late-class circuit, so both adding cost, also As time goes on electric capacity charge storage ability becomes poor, and can not meet operates a switch again preserves with data. Electricity is fallen in computation chip detection can select half cycle detection time, 1 cycle detection time can also be selected, detection time is short, electrical network has fluctuation that relay misoperation can be caused to do, owing to computation chip detection is by detecting after Hi-pass filter when detection time is long, due to city's electricity fall electricity fast in half period voltage be just 0, cause computation chip can not capture electricity completely. The present invention can correctly capture electricity, enough energy hole rly.s also can be had to operate a switch and preserve with data, effectively compensate for above-mentioned defect.
Summary of the invention
The present invention is intended to solve above-mentioned prior art can not problem that effectively relay is operated a switch and stored with data when falling electricity, it is proposed to the electric energy table that a kind of front stage detection of power loss and control magnetic latching relay are operated a switch and preserved with data. Just can correctly capture electricity in the moment falling city's electricity, ensure that having sufficient energy hole rly. to operate a switch stores with data, makes data preserve safer, and reduces the cost of simple rear class detection, has a good application prospect.
The technical scheme of the present invention is:
The electric energy table that front stage detection of power loss and control magnetic latching relay are operated a switch and preserved with data, it comprises power supply module and control module, and described power supply module comprises prime detecting unit and rectification and voltage division unit; Described control module comprises rear class detecting unit, data storage unit, rly. unit, micro-chip and metering unit; Described prime detecting unit, rectification and voltage division unit, rear class detecting unit, data storage unit, rly. unit are all connected with the respective signal end of micro-chip with metering unit.
The prime detecting unit of the present invention comprises by diode D1-D3, resistance R1, R3, the rectification pressure limiting circuit that R4 and Zener diode VD1 is formed, and by triode Q1M, resistance R51M, R50M, R52M, electric capacity C51M, the prime detection circuit that C53M is formed, described diode D1-D3 forms half-wave rectification, the positive pole of diode D1-D3 connects the three-phase electricity source of electric energy table respectively, the negative pole of diode D1-D3 is contact resistance R1 respectively, R3, one end of R4, resistance R1, R3, the other end of R4 also connects the negative pole of Zener diode VD1 after connecing, the positive pole of Zener diode VD1 connects the input of prime detection circuit and the base stage of triode Q1M as the output of rectification pressure limiting circuit, the grounded emitter of triode Q1M, 3.3V power supply is connect after collector electrode series resistance R51M, the collector electrode of triode Q1M is also connected with the I/O port VT_CHK of micro-chip,The voltage stabilizing of transient voltage higher than Zener diode of described Zener diode VD1 is made when three-phase supply inputs, described single-chip I/O mouth VT_CHK is lower level, make described Zener diode VD1 transient voltage lower than voltage stabilizing when three-phase supply inputs, described single-chip I/O mouth VT_CHK is high level.
The rear class detecting unit of the present invention comprises resistance R1P, R4P, R7P, Zener diode D1P, triode Q1P and electric capacity C2P, C3P, the one termination power supply end DC of described resistance R4P, the negative pole of another termination Zener diode D1P of resistance R4P, the negative pole of Zener diode D1P connects the base stage of triode Q1P, the collector electrode of described triode Q1P connects one end of pull-up resistor R1P, the collector electrode of triode Q1P is connected with the tie point of resistance R1P input terminus VIN_INT corresponding to micro-chip, the grounded emitter of described triode Q1P, shunt capacitance C3P and resistance R7P between the emtting electrode of triode Q1P and base stage, when input voltage is higher than the Vbe sum of the voltage stabilizing of Zener diode and triode Q1P, described micro-chip VIN_INT pin is lower level, when input voltage is lower than the Vbe sum of the voltage stabilizing of Zener diode and triode Q1P, described micro-chip VIN_INT pin is high level.
The method that front stage detection of power loss and control magnetic latching relay are operated a switch and preserved with data, the electric energy table that application front stage detection of power loss and control magnetic latching relay are operated a switch and preserved with data, it comprises the following steps:
(1), prime detecting unit carry out detection of power loss, if electricity being detected, micro-chip control rly. unit operate a switch and by data storage unit store data, if can't detect electricity, then continue detection;
(2), rear class detecting unit carry out detection of power loss, if electricity also being detected, micro-chip reduce dominant frequency enter dormant state thus reduce power consumption, if electricity not detected, then continue detection 10S;
If rear class detection does not detect electricity yet in 10S, the aforementioned rly. of micro-chip control closes a floodgate, and returns step (1), if electricity being detected in 10S, then micro-chip reduction dominant frequency enters dormant state.
Present method also comprises the following steps:
(3), rear class detecting unit carry out electro-detection in rear class, when detecting that rear class powers on, user by button relay unit close a floodgate, return step (1), when not detecting that rear class powers on, continue detection.
The useful effect of the present invention:
The described micro-chip every millisecond detection level that once described prime detects when the electric energy table of the present invention works, find that described prime detects electricity, rly. processed described in described micro-chip control is operated a switch and is preserved with described data, terminating if the detection of described rear class also detects that electric and described rly. processed has operated a switch to preserve with described data, described electric energy table enters dormancy pattern, wait that described rear class detects to power on, described electric energy table normal operation. If described prime detects electricity, the detection of described rear class does not detect electricity in 10S, and described electric energy table controls described rly. and closes a floodgate, and normally runs.
Present invention achieves the moment falling city's electricity just can correctly capture electricity, ensures to have sufficient energy hole rly. to operate a switch and data store, data is preserved safer, and reduce the cost of simple rear class detection, have a good application prospect.
Accompanying drawing explanation
Fig. 1 is one of prime detecting unit functional block diagram of the present invention.
Fig. 2 is the two of the prime detecting unit functional block diagram of the present invention.
Fig. 3 is the rear class detecting unit functional block diagram of the present invention.
Fig. 4 is the three-phase input transient voltage figure of the present invention
Fig. 5 is the two-phase input transient voltage figure of the present invention
Fig. 6 is a phase input transient voltage figure of the present invention
Fig. 7 is the not input transient voltage figure of the present invention
Fig. 8 is the schema of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
Alternating-current A, B, C three-phase input as shown in Figure 1, through D1, D2, D3 diode again through current limliting resistance R1, R3, R4 resistance, make the described voltage stabilizing tube conducting of 20V and described Q1M transistor base voltage reaches 0.7V, then the transient voltage of described alternating-current A, B, C three-phase input is more than or equal to 20.7V.
There will be four kinds of situations, situation one: described alternating-current A, B, C three-phase all has voltage in three-phase electricity inputs; Situation two: described alternating-current A, B, C three-phase only two-phase have voltage; Situation three: described alternating-current A, B, C three-phase only a phase have voltage; Situation four: described alternating-current A, B, C three-phase does not all have voltage to input.
Situation one: described alternating-current A, B, C three-phase all has voltage (such as Fig. 4). In one-period, minimum transient voltage is that 220V*sin45 about equals 155.5V in that case. All it is greater than 20.7V. Then the detection of described prime is lower level always.
Situation two: described alternating-current A, B, C three-phase is two phase voltages (such as Fig. 5) only. In one-period, only voltage between t1, t2 is greater than 20.7V in that case. At the angle=arcsin (20.7/230) of t1, angle is between 0 to 90 degree, so the angle of t1 is 6 degree, the angle of t2 is 174+120=294 degree. Mains frequency is 50Hz, then the time that transient voltage is greater than 20.7V in one-period equals (294-6)/360/50=16ms. The detection of described prime has the high level of the lower level 4 milliseconds of 16 milliseconds.
Situation three: described alternating-current A, B, C three-phase is a phase voltage (such as Fig. 6) only. In one-period, only voltage between t1, t2 is greater than 20.7V in that case. At the angle=arcsin (20.7/230) of t1, angle is between 0 to 90 degree, so the angle of first blue line is 6 degree, the angle of t2 is 174 degree. Mains frequency is 50Hz, then the time that transient voltage is greater than 20.7V in one-period equals (174-6)/360/50 and is about 9.5ms. The detection of described prime has the high level of the lower level 10.5 milliseconds of 9.5 milliseconds.
Situation four: described alternating-current A, B, C three-phase does not all have voltage input (such as Fig. 7). Voltage is not had to be greater than 20.7V in that case in one-period. The detection of described prime has the high level of the lower level 20 milliseconds of 0 millisecond.
Draw to draw a conclusion according to above four kinds of situations:
| Three-phase has electricity | Two-phase has electricity | One phase has electricity | All do not have electricity | |
| Prime detection high level time in one-period | 0ms | 4ms | 10.5ms | 20ms |
| Prime detection low level time in one-period | 20ms | 16ms | 9.5ms | 0ms |
If like this with the resolving power of 1ms detect described prime detection detection high level time be greater than 10.5ms; think and fall electricity. Owing to city's electricity may exist shake, it is necessary to the time continuing detection 50ms is that high level is then thought and fallen electricity, once lower level then time clear 0 timing from newly; When described prime detects electricity, then relay is operated a switch and is preserved with data.
As shown in Figure 3: when the input voltage of 12V can be high from low change lower than single-chip I/O mouth VIN_INT pin during 7.5V, micro-chip can trigger positive rise to interrupt.Then thinking that described rear class detects electricity, micro-chip enters dormancy. When there being 12V voltage to input, single-chip I/O mouth VIN_INT pin can become low from height, and micro-chip can trigger negative edge to interrupt, and electric energy table wakes up from dormant state.
As shown in Figure 8: be described electric energy table workflow. Whether described micro-chip every millisecond detection prime falls electricity, and when prime falls electricity, relay is operated a switch and preserved with data, and rear class detects electricity, and electric energy table enters dormant state. When described rear class detects the ammeter work that powers on, but rly. must be closed a floodgate by button by user, avoids the damage of household electrical appliance.
Part that the present invention does not relate to is all same as the prior art maybe can adopt prior art to be realized.
Claims (5)
1. the electric energy table that front stage detection of power loss and control magnetic latching relay are operated a switch and preserved with data, is characterized in that: it comprises power supply module and control module, described power supply module comprises prime detecting unit and rectification and voltage division unit; Described control module comprises rear class detecting unit, data storage unit, rly. unit, micro-chip and metering unit; Described prime detecting unit, rectification and voltage division unit, rear class detecting unit, data storage unit, rly. unit are all connected with the respective signal end of micro-chip with metering unit.
2. the electric energy table that front stage detection of power loss according to claim 1 and control magnetic latching relay are operated a switch and preserved with data, it is characterized in that: described prime detecting unit comprises by diode D1-D3, resistance R1, R3, the rectification pressure limiting circuit that R4 and Zener diode VD1 is formed, and by triode Q1M, resistance R51M, R50M, R52M, electric capacity C51M, the prime detection circuit that C53M is formed, described diode D1-D3 forms half-wave rectification, the positive pole of diode D1-D3 connects the three-phase electricity source of electric energy table respectively, the negative pole of diode D1-D3 is contact resistance R1 respectively, R3, one end of R4, resistance R1, R3, the other end of R4 also connects the negative pole of Zener diode VD1 after connecing, the positive pole of Zener diode VD1 connects the input of prime detection circuit and the base stage of triode Q1M as the output of rectification pressure limiting circuit, the grounded emitter of triode Q1M, 3.3V power supply is connect after collector electrode series resistance R51M, the collector electrode of triode Q1M is also connected with the I/O port VT_CHK of micro-chip, the voltage stabilizing of transient voltage higher than Zener diode of described Zener diode VD1 is made when three-phase supply inputs, described single-chip I/O mouth VT_CHK is lower level, make described Zener diode VD1 transient voltage lower than voltage stabilizing when three-phase supply inputs, described single-chip I/O mouth VT_CHK is high level.
3. the electric energy table that front stage detection of power loss according to claim 1 and control magnetic latching relay are operated a switch and preserved with data, it is characterized in that: described rear class detecting unit comprises resistance R1P, R4P, R7P, Zener diode D1P, triode Q1P and electric capacity C2P, C3P, the one termination power supply end DC of described resistance R4P, the negative pole of another termination Zener diode D1P of resistance R4P, the negative pole of Zener diode D1P connects the base stage of triode Q1P, the collector electrode of described triode Q1P connects one end of pull-up resistor R1P, the collector electrode of triode Q1P is connected with the tie point of resistance R1P input terminus VIN_INT corresponding to micro-chip, the grounded emitter of described triode Q1P, shunt capacitance C3P and resistance R7P between the emtting electrode of triode Q1P and base stage, when input voltage is higher than the Vbe sum of the voltage stabilizing of Zener diode and triode Q1P, described micro-chip VIN_INT pin is lower level, when input voltage is lower than the Vbe sum of the voltage stabilizing of Zener diode and triode Q1P, described micro-chip VIN_INT pin is high level.
4. the method that a front stage detection of power loss and control magnetic latching relay are operated a switch and preserved with data, application rights requires the front stage detection of power loss that one of 1-3 is described and the electric energy table that control magnetic latching relay is operated a switch and preserved with data, it is characterised in that: it comprises the following steps:
(1), prime detecting unit carry out detection of power loss, if electricity being detected, micro-chip control rly. unit operate a switch and by data storage unit store data, if can't detect electricity, then continue detection;
(2), rear class detecting unit carry out detection of power loss, if electricity also being detected, micro-chip reduce dominant frequency enter dormant state thus reduce power consumption, if electricity not detected, then continue detection 10S;
If rear class detection does not detect electricity yet in 10S, the aforementioned rly. of micro-chip control closes a floodgate, and returns step (1), if electricity being detected in 10S, then micro-chip reduction dominant frequency enters dormant state.
5. the method that front stage detection of power loss according to claim 4 and control magnetic latching relay are operated a switch and preserved with data, it is characterised in that: it also comprises the following steps:
(3), rear class detecting unit carry out electro-detection in rear class, when detecting that rear class powers on, user by button relay unit close a floodgate, return step (1), when not detecting that rear class powers on, continue detection.
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| CN201610117185.3A CN105675977B (en) | 2016-03-02 | 2016-03-02 | A kind of electric energy meter and method with front stage detection of power loss |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526267A (en) * | 2016-12-21 | 2017-03-22 | 武汉阿迪克电子股份有限公司 | Single-phase intelligent electricity-stealing-prevention electric energy meter and method for reducing power consumption |
| CN112667643A (en) * | 2021-01-07 | 2021-04-16 | 南方电网数字电网研究院有限公司 | Power failure data storage method and device based on double-core intelligent electric meter |
| CN112821345A (en) * | 2021-01-25 | 2021-05-18 | 上海电器科学研究所（集团）有限公司 | Control device and control method for voltage fault protection |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2477890A (en) * | 2008-12-10 | 2011-08-17 | Palace Power Systems | Electricity meter and method of operating the electricity meter |
| EP2315041A3 (en) * | 2009-10-24 | 2011-06-29 | Hager Electro GmbH & Co. KG | Electronic electricity meter |
| 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 |
| CN103645655B (en) * | 2013-12-24 | 2016-03-09 | 上海贝岭股份有限公司 | A kind of control method of relay for one-phase smart electric meter |
| CN104535832A (en) * | 2015-01-19 | 2015-04-22 | 国家电网公司 | Intelligent household appliance electric energy metering device and intelligent household appliance |
| CN205562677U (en) * | 2016-03-02 | 2016-09-07 | 江苏林洋能源股份有限公司 | Around level power failure detection and control magnetic latching relay operate a switch and data storage's electric energy meter |
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2016
- 2016-03-02 CN CN201610117185.3A patent/CN105675977B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526267A (en) * | 2016-12-21 | 2017-03-22 | 武汉阿迪克电子股份有限公司 | Single-phase intelligent electricity-stealing-prevention electric energy meter and method for reducing power consumption |
| CN112667643A (en) * | 2021-01-07 | 2021-04-16 | 南方电网数字电网研究院有限公司 | Power failure data storage method and device based on double-core intelligent electric meter |
| CN112667643B (en) * | 2021-01-07 | 2023-09-15 | 南方电网数字电网研究院有限公司 | Power failure data storage method and device based on double-core intelligent ammeter |
| CN112821345A (en) * | 2021-01-25 | 2021-05-18 | 上海电器科学研究所（集团）有限公司 | Control device and control method for voltage fault protection |
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| CN105675977B (en) | 2018-12-28 |
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Effective date of registration: 20210916 Address after: No.188, Tianyuan East Road, Jiangning District, Nanjing City, Jiangsu Province, 210000 Patentee after: JIANGSU HUAYUAN APPARATUS AND INSTR Co.,Ltd. Address before: No. 666, Linyang Road, Qidong City, Nantong City, Jiangsu Province, 226200 Patentee before: JIANGSU LINYANG ENERGY Co.,Ltd. |
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