CN106249046A - A kind of signals collecting metering module - Google Patents
A kind of signals collecting metering module Download PDFInfo
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- CN106249046A CN106249046A CN201610564081.7A CN201610564081A CN106249046A CN 106249046 A CN106249046 A CN 106249046A CN 201610564081 A CN201610564081 A CN 201610564081A CN 106249046 A CN106249046 A CN 106249046A
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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
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Abstract
The present invention relates to electric meter field, provide a kind of signals collecting metering module, signals collecting in intelligent electric meter and electric energy metrical, including computation chip and peripheral hardware circuit, described computation chip is ATT7022C three-phase electrical energy computation chip, and described peripheral hardware circuit includes power supply, voltage input unit, electric current input block, pulse output unit and SPI communication interface circuit.The signals collecting metering module of the present invention, has the advantage that acquisition function is many, measuring accuracy is high, anti-electricity-theft.
Description
Technical field
The present invention relates to appliance field, particularly relate to signals collecting metering module.
Background
Along with the pace of progress of China's process of industrialization, industry and residential electricity consumption sharply increase, and huge supply network is given and used
Electricity management unit brings huge challenge, brings inconvenience also to resident factory.For this China in " 12 planning "
Propose to build the solution of " intelligent grid ", it is achieved electrical network, computer network, the telecommunications network integration of three networks.
Electric energy meter in early days is vicarious machinery electric energy meter, and the metering accuracy of this kind of table is poor, and power consumption is big, and gage width has
Limit, service life is short, does not the most adapt to demand and the demand of electric power enterprise reform and development of Electricity customers.Along with electronics industry
Development, electronic electric energy meter is by customer power supply voltage and current real-time sampling, uses special electric energy computation chip, collection
Become circuit design, be the smart instrumentation integrating the functions such as electric energy metrical, data process, telecommunication, possess data volume
Computing capability, capability of fast response and precision are high, real-time high, and no matter its design is for supplier of electricity or electricity consumption
Fang Douneng brings good economic benefit.In electronic electric energy meter, especially in intelligent electric meter, signals collecting metering module is
The unit of core.
Summary of the invention
Present invention solves the technical problem that and be to provide a kind of the most efficient, the signals collecting metering mould that function of measuring is many
Block.
For solving the problems referred to above, present invention employs following technical scheme:
A kind of signals collecting metering module, the signals collecting in intelligent electric meter and electric energy metrical, including computation chip and outer
Enclosing hardware circuit, described computation chip is ATT7022C three-phase electrical energy computation chip, and described peripheral hardware circuit includes power supply, electricity
Pressure input block, electric current input block, pulse output unit and SPI communication interface circuit；Wherein, described power supply is for giving metering
Chip power supply, the connection alternating current circuit, one end of described voltage input unit, the other end connects computation chip, and the input of described electric current is single
Unit is serially connected with in alternating current circuit, and connects described computation chip, described pulse output unit connect ATT7022C chip CFl,
CF2, CF3, CF4 foot, the communication line interface of described SPI communication interface circuit connect the CS of ATT7022C chip, SCLK, DIN,
DOUT foot.
Preferably, described voltage input unit uses electric resistance partial pressure type circuit, including resistance R1-R3 and electric capacity C1, C2；Institute
Stating resistance R1 one end and connect input live wire, the other end connects resistance R2, one end of electric capacity C1 and outfan, described resistance R2's
Another other end terminating bias voltage REFO, electric capacity C1 connects input zero line ground connection, a termination biased electrical of resistance R3
Pressure REFO, the other end connects one end and outfan, the other end ground connection of electric capacity C2 of C2.
Preferably, described electric current input block uses Differential input circuit, including transformator T1, resistance R4-R7 and electric capacity
C3、C4；The input of described transformator T1 connects input live wire and zero line, and outfan connects the one of resistance R4 and R6 respectively
End, the other end of resistance R4 connects resistance R5, one end of electric capacity C3 and outfan, another termination bias voltage of resistance R5
REFO；The other end of resistance R6 connects electric capacity C4, one end of resistance R7 and outfan, and the other end of electric capacity C4 connects electric capacity C3's
The other end ground connection, another termination bias voltage REFO of resistance R7.
Further, described pulse output unit connects CFl, CF2, CF3, CF4 foot of ATT7022C chip, and output is used for
The electrical energy impulse signals of calibration, wherein, the meritorious energy pulse of CFl foot output, the output quadergy pulse of CF2 foot；Arrange
When the control depositor of ATT7022C chip selects first-harmonic table schema, the output fundamental active pulse of CF3 foot, CF4 foot output first-harmonic
Idle pulse, during selected harmonic table schema, CF3 foot output harmonic wave is gained merit pulse, pulse that CF4 foot output harmonic wave is idle.
Preferably, the holding wire of described SPI communication interface is in series with a resistance, and is provided with one at signal input part
Decoupling capacitor.
Further, described power supply includes battery, Power Management Unit and AC/DC converter unit.
The signals collecting metering module of the present invention, selects ATT7022C three-phase electrical energy computation chip to measure as signals collecting
The core devices of module, its chip package is 44 pin QFP forms, owing to it has been internally integrated seven road second order sigma
DeltaADC, wherein sample for three-phase voltage in three tunnels, samples for three-phase current in three tunnels, also a road for neutral line current or
The sampling of other anti-electricity-theft parameters, very convenient to use.Its internal electric voltage observation circuit can ensure that powered up and down
Shi Zhengchang works, it is provided that a SPI interface, conveniently and carries out measuring parameter and the transmission of calibration parameter between outside MCU.
The signals collecting metering module of the present invention, has the advantage that acquisition function is many, measuring accuracy is high, anti-electricity-theft.For
When the collection of electricity is measured, have powerful data processing operation, storage and fan-out capability, and serial ports and spi bus can be passed through
It is connected with peripheral hardware, makes the electric energy meter oneself power consumption of this module of employing be greatly lowered, and internal offer software regulating meter, greatly reduce
Cost of human resources.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of signals collecting metering module of the present invention；
Fig. 2 is the peripheral circuit diagram of ATT7022C three-phase electrical energy computation chip in Fig. 1 embodiment；
Fig. 3 is the circuit diagram of voltage input unit in Fig. 1 embodiment；
Fig. 4 is the circuit diagram of electric current input block in Fig. 1 embodiment.
Specific embodiment
In order to be further appreciated by the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but
Should be appreciated that these describe simply as to further illustrate the features and advantages of the present invention rather than to the claims in the present invention
Limit.
In conjunction with the accompanying drawings and embodiments, the present invention is further described.
As Figure 1-4, in one embodiment of the invention, a kind of signals collecting metering module, for intelligent electric meter
In signals collecting and electric energy metrical, including computation chip and peripheral hardware circuit, described computation chip is ATT7022C three-phase
Electric energy computation chip, described peripheral hardware circuit includes power supply, voltage input unit, electric current input block, pulse output unit
And SPI communication interface circuit.
As it is shown on figure 3, voltage input unit uses electric resistance partial pressure type circuit, including resistance R1-R3 and electric capacity C1, C2；Its
In, resistance R1 one end connects input live wire, and the other end connects resistance R2, one end of electric capacity C1 and outfan, described resistance R2
Other end of another termination bias voltage REFO, electric capacity C1 connect input zero line ground connection, a termination biasing of resistance R3
Voltage REFO, the other end connects one end and outfan, the other end ground connection of electric capacity C2 of C2.
As shown in Figure 4, described electric current input block uses Differential input circuit, including transformator T1, resistance R4-R7 and electricity
Hold C3, C4；The input of described transformator T1 connects input live wire and zero line, and outfan connects the one of resistance R4 and R6 respectively
End, the other end of resistance R4 connects resistance R5, one end of electric capacity C3 and outfan, another termination bias voltage of resistance R5
REFO；The other end of resistance R6 connects electric capacity C4, one end of resistance R7 and outfan, and the other end of electric capacity C4 connects electric capacity C3's
The other end ground connection, another termination bias voltage REFO of resistance R7.
In the present embodiment, above-mentioned bias voltage REFO is set to 2.4V.
Electrical energy pulse output signal is mainly used in calibration, and CFl is the meritorious energy pulse of output, and CF2 is output quadergy
Pulse.And by ATT7022C controls the setting of depositor, when selecting first-harmonic table schema, CF3 is output fundamental active pulse,
CF4 is output fundamental wave reactive power pulse, and during selected harmonic table schema, CF3 is that output harmonic wave is gained merit pulse, CF4 be output harmonic wave without
Merit pulse.
Meanwhile, between ATT7022C and peripheral hardware MCU, have 6 connecting lines, wherein 4 be SPI communication line interface CS, SCLK,
DIN, DOUT, the reset control line of an ATT7022C, a handshake line SIG.Although ATT7022C SPI read-write own has
The most perfect verification means, but also with greater need for the capacity of resisting disturbance of reinforcement holding wire, SPI communication interface line the most in the design
Should be the shortest, for making SPI transmission signal not be interfered and should wrap by property-line around.Signal is received for eliminating
High-frequency Interference, a l0Q resistance of can connecting on SPI signal line, and add a decoupling capacitor at signal input part, this can approximate
Constituting a low pass filter, decoupling capacitor can suitably select greatly, to strengthen capacity of resisting disturbance.
Considering the various requirement of design, ATT7022C peripheral hardware circuit is as shown in Figure 2.
Finally, power supply includes battery, Power Management Unit and AC/DC converter unit, have good stability and
Electro Magnetic Compatibility.
The explanation of above example is only intended to help to understand method and the core concept thereof of the present invention.It is right to it should be pointed out that,
For those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention is carried out
Some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Claims (6)
1. a signals collecting metering module, the signals collecting in intelligent electric meter and electric energy metrical, it is characterised in that: include
Computation chip and peripheral hardware circuit, described computation chip is three-phase electrical energy computation chip, and described peripheral hardware circuit includes electricity
Source, voltage input unit, electric current input block, pulse output unit and SPI communication interface circuit；Wherein, described power supply is used for
Powering to computation chip, the connection alternating current circuit, one end of described voltage input unit, the other end connects computation chip, described electric current
Input block is serially connected with in alternating current circuit, and connects described computation chip, described pulse output unit connect chip CFl,
CF2, CF3, CF4 foot, the communication line interface of described SPI communication interface circuit connects CS, SCLK, DIN, DOUT foot of chip.
2. signals collecting metering module as claimed in claim 1, it is characterised in that: described voltage input unit uses resistance to divide
Pressure type circuit, including resistance R1-R3 and electric capacity C1, C2；Described resistance R1 one end connects input live wire, and the other end connects resistance
R2, one end of electric capacity C1 and outfan, the other end of another termination the bias voltage REFO, electric capacity C1 of described resistance R2 connects defeated
Entering to hold zero line ground connection, a termination bias voltage REFO of resistance R3, the other end connects one end and the outfan of C2, electric capacity C2's
Other end ground connection.
3. signals collecting metering module as claimed in claim 1, it is characterised in that: described electric current input block uses difference defeated
Enter circuit, including transformator T1, resistance R4-R7 and electric capacity C3, C4；The input of described transformator T1 connect input live wire and
Zero line, outfan connects one end of resistance R4 and R6 respectively, and the other end of resistance R4 connects resistance R5, one end of electric capacity C3 and defeated
Go out end, another termination bias voltage REFO of resistance R5；The other end of resistance R6 connects electric capacity C4, one end of resistance R7 and output
End, the other end of electric capacity C4 connects the other end the ground connection of electric capacity C3, another termination bias voltage REFO of resistance R7.
4. signals collecting metering module as claimed in claim 1, it is characterised in that: described pulse output unit connects
CFl, CF2, CF3, CF4 foot of ATT7022C chip, output is for the electrical energy impulse signals of calibration, and wherein, the output of CFl foot is meritorious
Energy pulse, the output quadergy pulse of CF2 foot；When the control depositor selection first-harmonic table schema of ATT7022C chip is set,
The output fundamental active pulse of CF3 foot, the output fundamental wave reactive power pulse of CF4 foot, during selected harmonic table schema, CF3 foot output harmonic wave has
Merit pulse, pulse that CF4 foot output harmonic wave is idle.
5. signals collecting metering module as claimed in claim 4, it is characterised in that: on the holding wire of described SPI communication interface
It is in series with a resistance, and is provided with a decoupling capacitor at signal input part.
6. the signals collecting metering module as described in any one of claim 1-5, it is characterised in that: described power supply include battery,
Power Management Unit and AC/DC converter unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610564081.7A CN106249046A (en) | 2016-07-18 | 2016-07-18 | A kind of signals collecting metering module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610564081.7A CN106249046A (en) | 2016-07-18 | 2016-07-18 | A kind of signals collecting metering module |
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| CN106249046A true CN106249046A (en) | 2016-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109682268A (en) * | 2019-03-15 | 2019-04-26 | 江南机电设计研究所 | A kind of micro missile test device |
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| CN201811994U (en) * | 2010-08-24 | 2011-04-27 | 杭州尚能科技有限公司 | Single-phase electronic electric energy measurer |
| CN203433041U (en) * | 2013-09-04 | 2014-02-12 | 厦门理工学院 | An electric energy meter provided with a communication function |
| CN105116244A (en) * | 2015-07-20 | 2015-12-02 | 柳州好顺科技有限公司 | Electronic product testing device |
| CN205246757U (en) * | 2015-10-16 | 2016-05-18 | 台州启辰电气设备有限公司 | Electric energy meter signal acquisition metering modules |
-
2016
- 2016-07-18 CN CN201610564081.7A patent/CN106249046A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201811994U (en) * | 2010-08-24 | 2011-04-27 | 杭州尚能科技有限公司 | Single-phase electronic electric energy measurer |
| CN203433041U (en) * | 2013-09-04 | 2014-02-12 | 厦门理工学院 | An electric energy meter provided with a communication function |
| CN105116244A (en) * | 2015-07-20 | 2015-12-02 | 柳州好顺科技有限公司 | Electronic product testing device |
| CN205246757U (en) * | 2015-10-16 | 2016-05-18 | 台州启辰电气设备有限公司 | Electric energy meter signal acquisition metering modules |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109682268A (en) * | 2019-03-15 | 2019-04-26 | 江南机电设计研究所 | A kind of micro missile test device |
| CN109682268B (en) * | 2019-03-15 | 2021-04-06 | 江南机电设计研究所 | Miniature guided missile testing arrangement |
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Address after: 545005 new willow Avenue, Liuzhou, Liuzhou, the Guangxi Zhuang Autonomous Region, No. 2, 20 floors 9, city E District Applicant after: LIUZHOU HAOSHUN TECHNOLOGY CO., LTD. Address before: No. 16 Golden Road Liunan District of Liuzhou city in 545005 the Guangxi Zhuang Autonomous Region Tan Hui 1 Building 1 unit 5-13 No. Applicant before: LIUZHOU HAOSHUN TECHNOLOGY CO., LTD. |
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Application publication date: 20161221 |