CN202421328U - Self-testing electronic electricity meter - Google Patents
Self-testing electronic electricity meter Download PDFInfo
- Publication number
- CN202421328U CN202421328U CN2011205261599U CN201120526159U CN202421328U CN 202421328 U CN202421328 U CN 202421328U CN 2011205261599 U CN2011205261599 U CN 2011205261599U CN 201120526159 U CN201120526159 U CN 201120526159U CN 202421328 U CN202421328 U CN 202421328U
- Authority
- CN
- China
- Prior art keywords
- electric energy
- self
- energy meter
- computation chip
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a self-testing electronic electricity meter, which can carry out self-testing and accurately measure the electricity of a power system at the same time. The self-testing electronic electricity meter a measuring circuit, a microprocessor, an MTP memory unit, a display unit, a power supply and a meter calibration output end, and the measuring circuit comprises a sampling circuit, an A/D (analog/digital) conversion circuit and a measuring chip. The technical scheme of the utility model realizes low-cost meter calibration, increases the efficiency, enhances the security of meter calibration parameters and the reliability of the error of the electricity meter, reduces the cost, and is low-carbon and environment-friendly.
Description
Technical field
The utility model belongs to the electric energy metrical technology, is specifically related to a kind of electronic electric energy meter that can realize self-checking function.
Background technology
Electric energy meter is a kind of device that the power consumption of electric system is measured, and along with increasingly sophisticatedization of continuous advancement in technology and electric system, the measuring accuracy of electric energy meter improves constantly, precise information measurements such as for example timesharing, segmentation, rate control etc.Therefore; Whether most important the electric energy meter metering is accurately; Current, to electronic electric energy meter, especially the verification of intelligent electric energy meter is mainly through after gathering electric system electric current and information of voltage; At the metering section front end resistance supervising network is set, and realizes correction electric energy meter error through adjustment to resistor network.The operation process of the artificial calibration of this dependence is loaded down with trivial details, and error is bigger, and electromagnetic interference (EMI) is excessive, the infringement circuit chip.
There is the internal clocking of researching and proposing through intelligent electric meter MCU to come the output error corrected value; And the output verification pulse, though this technical scheme has been alleviated the problem that manual calibration produces, its technology itself in fact only is the content of a kind of " computation chip+calibration software "; Its technological deficiency is still to rely on hardware to realize calibration; The verification pulse of MCU output still needs the outside calibration equipment of electric energy meter to carry out Data Management Analysis, and the calibration operation is still loaded down with trivial details, reduces production efficiency.
Along with updating of technology, the someone proposes to adopt the scheme of " computation chip+MCU+EEPROM ", or adopts " NVM+ power-fail detection circuit " to address the aforementioned drawbacks; When mainly being the power down of assurance system, the purpose of doing like this can preserve some continuous data, in order to avoid cause loss of data, but cost is high; Also someone's mode of studying employing " computation chip+EEPROM " reduces cost, but these two kinds of schemes all can't solve a problem, and promptly data reliability can't guarantee at all; In the process that needs the repetitive read-write continuous data; Because (for example) be read data or cover data repeatedly, can cause the content multilated of EEPROM, even rewritten; And the probability of this defective is higher, so and inadvisable.Simultaneously, be not only can once accomplish under normal conditions to the degree of accuracy verification of electric energy meter, for example in the electric energy meter production run, exist to electric energy meter reequip or check maybe, technique scheme obviously can not solve or improve such problem.
Summary of the invention
The utility model is intended to solve the defective that prior art exists, and proposes a kind of self-monitoring electronic electric energy meter, and it can carry out accurate measurement to the electric system electric energy when realizing self check.The self-monitoring electronic electric energy meter of the utility model first technical scheme comprises: metering circuit; It comprises sample circuit, A/D change-over circuit and computation chip; Said sample circuit is used at least one phase electric energy analog quantity information is sampled; And analog quantity information transferred to the A/D change-over circuit to convert numerical information into, and said A/D change-over circuit is electrically connected on computation chip to transmit said numerical information, and said computation chip comprises receiving end and data buffer area; Respectively in order to receive the external perimysium reference data and to write the calibration parameter; Said receiving end intercouples with data buffer area and is connected, and after said computation chip compares said numerical information and external perimysium reference data, calculates and is converted into the calibration parameter; Microprocessor, its communication link is connected to said computation chip, receives said calibration parameter and it is at least once write the data buffer area in the computation chip; The MTP storage unit, its communication link is connected to said computation chip and microprocessor, is used for write state data, electric quantity data and calibration parameter at least one time, confirms parameter when microprocessor and after correct the calibration parameter is write in the MTP storage unit; Display unit, its communication link is connected to said microprocessor, is used to show electric quantity data and status data; Power supply, it is electrically connected to said metering circuit, microprocessor and display unit and working power is provided for it; And the calibration output terminal, its communication link is connected to said microprocessor, is used to export metrical information.
As preferably, status data comprises the visual indication information of reflection electric energy meter self check state.
As preferably, display unit provides first indication information of a reflection self check initial state.
As preferably, display unit provides a reflection self check to carry out second indication information of state.
As preferably, display unit provides the 3rd indication information of a reflection self check completion status.
The self-monitoring electronic electric energy meter of the utility model second technical scheme comprises: metering circuit; It comprises sample circuit, A/D change-over circuit and computation chip; Said sample circuit is used at least one phase electric energy analog quantity information is sampled, and analog quantity information is transferred to the A/D change-over circuit to convert numerical information into, and said A/D change-over circuit is electrically connected on computation chip to transmit said numerical information; Said computation chip comprises MTP storage unit and receiving end; Said MTP storage unit is used for write state data, electric quantity data and calibration parameter at least one time, and said receiving end is in order to receive the external perimysium reference data, and said MTP storage unit intercouples with receiving end and is connected; After said computation chip compares said numerical information and external perimysium reference data, calculate and be converted into the calibration parameter; Display unit, its communication link is connected to said computation chip, is used to show electric quantity data and status data; Power supply, it is electrically connected to said metering circuit and display unit and working power is provided for it; And the calibration output terminal, its communication link is connected to said computation chip, is used to export the numerical information after the metering.
As preferably, status data comprises the visual information of reflection electric energy meter calibrating state.
As preferably, display unit provides first indication information of a reflection self check initial state.
As preferably, display unit provides a reflection self check to carry out second indication information of state.
As preferably, display unit provides the 3rd indication information of a reflection self check completion status.
Realized low-cost calibration through technique scheme, raised the efficiency; Improve the security of calibration parameter, improve the reliability of electric energy meter error; Reduce cost low-carbon environment-friendly.
Description of drawings
Below in conjunction with accompanying drawing the utility model is done further explanation:
Fig. 1 is the structural representation of first preferred embodiment of the utility model self-monitoring electronic electric energy meter;
Fig. 2 is the structural representation of second preferred embodiment of the utility model self-monitoring electronic electric energy meter.
Embodiment
With reference to Fig. 1, first embodiment of a kind of self-monitoring three-phase of the utility model electronic electric energy meter mainly comprises: metering circuit 100, power supply 200, microprocessor 300, display unit 400 and MTP storage unit 500.Wherein as shown in the figure, metering circuit 100 comprises current sampling circuit 101, voltage sampling circuit 102, A/D change-over circuit and computation chip 103.Three-phase current Ia, Ib, Ic insert current sampling circuit 101 and power supply 200; Three-phase voltage U a, Ub, Uc insert voltage sampling circuit 102; Sample circuit; 101 and 102 are used for three-phase current and voltage signal are sampled, and respectively with electric current and voltage analog information transmission to A/D change-over circuit to convert numerical information into, the A/D change-over circuit is electrically connected on computation chip 103 with transmitting digital information.Computation chip 103 comprises receiving end 105 and data buffer area 104; Respectively in order to receive the external perimysium reference data and to write the calibration parameter; Receiving end 105 intercouples with data buffer area 104 and is connected; After computation chip 103 compares these numerical informations and external perimysium reference data, calculate and be converted into the calibration parameter.Microprocessor 300 communication link are connected to computation chip 103, receive the calibration parameter and it is at least once write the data buffer area 104 in the computation chip 103.MTP storage unit 500 communication link are connected to computation chip 103 and microprocessor 300, are used for write state data, electric quantity data and calibration parameter at least one time, confirm parameter when microprocessor 300 and after correct the calibration parameter are write in the MTP storage unit 500.Display unit 400 communication link are connected to microprocessor 300, are used to show electric quantity data and status data.Power supply 200 is electrically connected to metering circuit 100, microprocessor 300 and display unit 400 and working power is provided for it.Calibration output terminal 600 communication link are connected to microprocessor 300, are used to export metrical information.Be to be understood that; What provide is the preferred embodiment of being implemented on the three-phase electric energy meter here; Purpose is merely the more embodiment of best explain the utility model, but is not that the utility model content is limited on the three-phase electric energy meter, it will be understood by those skilled in the art that; On, the network prepayment electric energy meter single-phase (for example), the utility model is suitable equally.
Can repeatedly programming, (multi-time programmable MTP) belongs in the PLD (PLD) one type, and patent CN101473634A has specifically described the principle that a kind of MTP can not wipe storage organization, and this paper will not give unnecessary details.
Wherein, status data comprises the visual indication information of reflection electric energy meter self check state.
Computation chip 103 can multiply each other voltage digital information and current digital information, and adds up, and for example in a three-phase and four-line electric energy meter, the electric energy computing formula is:
P＝U
aI
a+U
bI
b+U
cI
c
Perhaps, can be expressed as P=∑ { DIG_U
XDIG_I
X, DIG_U wherein
XRepresent the digital signal of ployphase voltages U, DIG_I
XRepresent the digital signal of polyphase current I, X={a, b, c, a, b, c ....Then, computation chip 103 transfers to microprocessor 300 with this energy data.
In addition, microprocessor 300 can be controlled metering circuit 100, especially computation chip 103 and A/D change-over circuit is carried out Digital Control.
Simultaneously, the voltage digital amount and the phase angles data of computation chip 103 each phase of transmission (for example) three-phase current, computation chip 103 can be carried out a kind of for example RMS computing to voltage digital amount and current digital amount.Then, computation chip transfers to microprocessor 300 with voltage digital amount and current digital amount and phase angles data.What should understand is that microprocessor 300 can be carried out said further conversion through computational data information.It is in order to measure electric system power consumption information more accurately that the utility model electronic electric energy meter is carried out self-check program, and (for example) current digital amount or phasing degree then are main obstacles.
As shown in Figure 1, computation chip 103 comprises a receiving end 105, is used for receiving the electric impulse signal from a high precision electric power meter (specific is a standard scale).Preferred embodiment according to the utility model; This standard scale produces a pulse signal under the metering frequency, and this series of pulses is transferred to computation chip 103 through receiving end 105, according to this series of pulses; Computation chip compares one period schedule time with the variable of standard scale and the variable of self electric energy meter; This schedule time can be decided by microprocessor 300, also can be determined by computation chip itself---for some electric energy meter that does not possess processing capacity, itself do not have data processing unit (for example MCU); Then this time period is predefined; And, for example realize that the electric energy meter of time-shared charge, branch rate accounting or network service, this time cycle are selectivity to formulate for for example intelligent electric energy meter.
Simultaneously, according to the utility model first embodiment, electronic electric energy meter can be communicated by letter with being connected and also carried out self check simultaneously with other several electric energy meters.For example, can be with N electronic electric energy meter N
1, N
2, N
3... N
nCarry out self check simultaneously.Generally speaking, for best production efficiency, n is preferably 10 to 30, for each ammeter N
xCan set clock signal simultaneously, or,, and not influence the process of other electric energy meters so that after one of them the completion self check of these electric energy meters, make the relay tripping operation directly to each ammeter serial connection simplified manual switch.
As preferably, when receiving end 105 received the external perimysium reference data, display unit 400 provided first indication information of a reflection self check initial state.
As preferably, in electric energy meter carried out one period schedule time of self check, display unit 400 provided a reflection self check to carry out second indication information of state.
As preferably, after the electric energy meter self check was accomplished, display unit 400 provided the 3rd indication information of a reflection self check completion status.
Existing with reference to Fig. 2, schematically show second embodiment of a kind of self-monitoring electronic electric energy meter of the utility model among the figure.Do not have the control of communication, rate and the simple-type electric energy meter that only has metering meter reading function for some, the utility model is suitable equally.The electronic electric energy meter of the utility model embodiment mainly comprises metering circuit 100 ', display unit 400 ', MTP storage unit 500 ' and calibration output terminal 600 '.Metering circuit 100 ' comprises current sampling circuit 101 ', voltage sampling circuit 102 ', A/D change-over circuit and computation chip 103 '; Sample circuit 101 '; 102 ' is used for the three-phase electric energy analog quantity information is sampled; And analog quantity information transferred to the A/D change-over circuit to convert numerical information into, said A/D change-over circuit is electrically connected on computation chip 103 ' to transmit said numerical information.Computation chip 103 ' comprises MTP storage unit 500 ' and a receiving end 105 ', and MTP storage unit 500 ' is used for write state data, electric quantity data and calibration parameter at least one time, and receiving end 105 ' is in order to receive the external perimysium reference data.MTP storage unit 500 ' intercouples with receiving end 105 ' and is connected, and after computation chip 103 ' compares said numerical information and external perimysium reference data, calculates and is converted into the calibration parameter.Display unit 400 ' communication link is connected to said computation chip 103 ', is used to show electric quantity data and status data.Power supply 200 ' is electrically connected to said metering circuit 100 ' and with display unit 400 ' working power is provided for it also; Calibration output terminal 600 ' communication link is connected to said computation chip 103 ', is used to export the numerical information after the metering.
As preferably, status data comprises the visual information of reflection electric energy meter calibrating state.
With the utility model first embodiment similarly, computation chip 103 can multiply each other voltage digital information and current digital information, and adds up, for example in a phase three-wire three direct-reading electric energy meter, the electric energy computing formula is:
P＝U
aI
a+U
bI
b+U
cI
c
Perhaps, can be expressed as P=∑ { DIG_U
XDIG_I
X, DIG_U wherein
XRepresent the digital signal of ployphase voltages U, DIG_I
XRepresent the digital signal of polyphase current I, X={a, b, c, a, b, c ....Then, computation chip 103 directly transfers to calibration output terminal 600 ' with this energy data, and continuous data is shown on the display unit 400 '.
Simultaneously, the voltage digital amount and the phase angles data of computation chip 103 ' each phase of transmission (for example) three-phase current, computation chip 103 ' can be carried out a kind of for example RMS computing to voltage digital amount and current digital amount.
Simultaneously, according to the utility model second embodiment, electronic electric energy meter can be communicated by letter with being connected and also carried out self check simultaneously with other several electric energy meters.For example, can be with N electronic electric energy meter N
1, N
2, N
3... N
nCarry out self check simultaneously.Generally speaking, for best production efficiency, n is preferably 10 to 30, for each ammeter N
xCan set clock signal simultaneously, or,, and not influence the process of other electric energy meters so that after one of them the completion self check of these electric energy meters, make the relay tripping operation directly to each ammeter serial connection simplified manual switch.
As preferably, when receiving end 105 ' received the external perimysium reference data, display unit 400 ' provided first indication information of a reflection self check initial state.
As preferably, in electric energy meter carried out a period of time of self check, display unit 400 ' provided a reflection self check to carry out second indication information of state.
As preferably, after the electric energy meter self check was accomplished, display unit 400 ' provided the 3rd indication information of a reflection self check completion status.
More than being merely several preferred embodiment of the utility model, being merely the description that makes things convenient for the utility model technical scheme, is not to be the qualification to the utility model.Wherein, numeral-classifier compound " " refers to odd number, possibly comprise a plurality of or its combination.Should understand, all modifications based on the utility model, variation and alternative all should be covered by in the technological category of the utility model.The utility model can solve the defective that prior art exists, and can realize the automatic calibration of electric energy meter with least cost, is worthy to be popularized.
Claims (10)
1. self-monitoring electronic electric energy meter; Be used to measure at least one phase electric energy of electric system, it is characterized in that comprising: metering circuit (100), it comprises sample circuit (101; 102), A/D change-over circuit and computation chip (103); Said sample circuit (101,102) is used at least one phase electric energy analog quantity information is sampled, and analog quantity information is transferred to the A/D change-over circuit to convert numerical information into; Said A/D change-over circuit is electrically connected on computation chip (103) to transmit said numerical information; Said computation chip (103) comprises receiving end (105) and data buffer area (104), and in order to receive the external perimysium reference data and to write the calibration parameter, said receiving end (105) intercouples with data buffer area (104) and is connected respectively; After said computation chip (103) compares said numerical information and external perimysium reference data, calculate and be converted into the calibration parameter; Microprocessor (300), its communication link are connected to said computation chip (103), receive said calibration parameter and it is at least once write the data buffer area (104) in the computation chip (103);
MTP storage unit (500); Its communication link is connected to said computation chip (103) and microprocessor (300); Be used for write state data, electric quantity data and calibration parameter at least one time, confirm parameter when microprocessor (300) and after correct the calibration parameter is write in the MTP storage unit (500);
Display unit (400), its communication link are connected to said microprocessor (300), are used to show electric quantity data and status data; Power supply (200), it is electrically connected to said metering circuit (100), microprocessor (300) and display unit (400) and working power is provided for it; And
Calibration output terminal (600), its communication link are connected to said microprocessor (300), are used to export metrical information.
2. a kind of self-monitoring electronic electric energy meter as claimed in claim 1 is characterized in that: said status data comprises the visual indication information of reflection electric energy meter self check state.
3. a kind of self-monitoring electronic electric energy meter as claimed in claim 2 is characterized in that: said display unit (400) provides first indication information of a reflection self check initial state.
4. a kind of self-monitoring electronic electric energy meter as claimed in claim 2 is characterized in that: said display unit (400) provides a reflection self check to carry out second indication information of state.
5. a kind of self-monitoring electronic electric energy meter as claimed in claim 2 is characterized in that: said display unit (400) provides the 3rd indication information of a reflection self check completion status.
6. self-monitoring electronic electric energy meter; Be used to measure at least one phase electric energy of electric system; It is characterized in that comprising: metering circuit (100 '), it comprises sample circuit (101 ', 102 '), A/D change-over circuit and computation chip (103 '); Said sample circuit (101 '; 102 ') be used at least one phase electric energy analog quantity information is sampled, and analog quantity information is transferred to the A/D change-over circuit to convert numerical information into, said A/D change-over circuit is electrically connected on computation chip (103 ') to transmit said numerical information; Said computation chip (103 ') comprises MTP storage unit (500 ') and receiving end (105 '); Said MTP storage unit (500 ') is used for write state data, electric quantity data and calibration parameter at least one time, and said receiving end (105 ') is in order to receive the external perimysium reference data, and said MTP storage unit (500 ') intercouples with receiving end (105 ') and is connected; After said computation chip (103 ') compares said numerical information and external perimysium reference data, calculate and be converted into the calibration parameter;
Display unit (400 '), its communication link is connected to said computation chip (103 '), is used to show electric quantity data and status data; Power supply (200 '), it is electrically connected to said metering circuit (100 ') and display unit (400 ') and working power is provided for it; And
Calibration output terminal (600 '), its communication link is connected to said computation chip (103 '), is used to export the numerical information after the metering.
7. a kind of self-monitoring electronic electric energy meter as claimed in claim 6 is characterized in that: said status data comprises the visual information of reflection electric energy meter calibrating state.
8. a kind of self-monitoring electronic electric energy meter as claimed in claim 7 is characterized in that: said display unit (400 ') provides first indication information of a reflection self check initial state.
9. a kind of self-monitoring electronic electric energy meter as claimed in claim 7 is characterized in that: said display unit (400 ') provides a reflection self check to carry out second indication information of state.
10. a kind of self-monitoring electronic electric energy meter as claimed in claim 7 is characterized in that: said display unit (400 ') provides the 3rd indication information of a reflection self check completion status.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205261599U CN202421328U (en) | 2011-12-15 | 2011-12-15 | Self-testing electronic electricity meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205261599U CN202421328U (en) | 2011-12-15 | 2011-12-15 | Self-testing electronic electricity meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202421328U true CN202421328U (en) | 2012-09-05 |
Family
ID=46746081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205261599U Expired - Fee Related CN202421328U (en) | 2011-12-15 | 2011-12-15 | Self-testing electronic electricity meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202421328U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411090A (en) * | 2011-12-15 | 2012-04-11 | 华立仪表集团股份有限公司 | Self-checking electronic energy meter and self-checking method thereof |
| CN103983831A (en) * | 2014-05-14 | 2014-08-13 | 国家电网公司 | Voltmeter and voltmeter pen special for protecting pressure plate |
| CN105301554A (en) * | 2015-12-03 | 2016-02-03 | 国网重庆市电力公司电力科学研究院 | Electric energy metering loop high precision data synchronous sampling device and method |
-
2011
- 2011-12-15 CN CN2011205261599U patent/CN202421328U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411090A (en) * | 2011-12-15 | 2012-04-11 | 华立仪表集团股份有限公司 | Self-checking electronic energy meter and self-checking method thereof |
| CN103983831A (en) * | 2014-05-14 | 2014-08-13 | 国家电网公司 | Voltmeter and voltmeter pen special for protecting pressure plate |
| CN105301554A (en) * | 2015-12-03 | 2016-02-03 | 国网重庆市电力公司电力科学研究院 | Electric energy metering loop high precision data synchronous sampling device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102411090A (en) | Self-checking electronic energy meter and self-checking method thereof | |
| CN102590784B (en) | Single-phase intelligent energy meter distributed correction method | |
| CN201352235Y (en) | Three-phase multifunctional electric energy meter | |
| CN106569164A (en) | Method and system for synchronization testing of electric quantity of double-core electric energy meter | |
| CN103558453B (en) | Multiple feed straight power purchase client's maximum demand acquisition system | |
| CN104914304A (en) | Electric energy accurate measurement method and electric energy accurate measurement device under fluctuating load | |
| CN105319529A (en) | System and method for calibrating errors of watt-hour meters | |
| CN103091550B (en) | Synchronous isolation sampling direct-current power meter of wide voltage and large current | |
| CN202421328U (en) | Self-testing electronic electricity meter | |
| CN105182065A (en) | Electricity information acquisition system based on intelligent electric meter | |
| CN206470388U (en) | The apparatus for evaluating of metering performance under dynamic load | |
| CN101871976A (en) | Power clock detecting device | |
| CN201654223U (en) | Verification device for electric energy meters | |
| CN201917610U (en) | Electric energy metering device | |
| CN201247268Y (en) | Electronic two-in-one electric energy meter | |
| CN203643504U (en) | Single-phase intelligent electric energy meter based SOC technology | |
| CN109407039A (en) | Intelligent electric meter and its system, self-diagnosing method and fault detection method | |
| CN201066532Y (en) | Measuring device with remote meter reading function | |
| CN202649307U (en) | Embedded electric energy meter based on Ethernet | |
| CN105513311A (en) | Electric power system data acquisition device | |
| CN111044781B (en) | Electric energy meter time-sharing electric quantity calculation method and device and computer equipment | |
| Rashid | Design and implementation of smart electrical power meter system | |
| CN111707983B (en) | Electric energy meter constant test method, equipment, system and medium | |
| CN203658458U (en) | Multi-power-source power supply maximum demand acquisition apparatus for direct power purchase customer | |
| CN209342898U (en) | One kind metering device scene that do not have a power failure changes the outfit electricity addscope |
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: 20120905 Termination date: 20121215 |