CN107015056A - A kind of kilowatt-hour meter based on ZigBee wireless transport modules - Google Patents
A kind of kilowatt-hour meter based on ZigBee wireless transport modules Download PDFInfo
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- CN107015056A CN107015056A CN201710110612.XA CN201710110612A CN107015056A CN 107015056 A CN107015056 A CN 107015056A CN 201710110612 A CN201710110612 A CN 201710110612A CN 107015056 A CN107015056 A CN 107015056A
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- kilowatt
- voltage
- hour meter
- wireless transport
- computation chip
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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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- 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
- G01R22/063—Details of electronic electricity meters related to remote communication
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The present invention discloses a kind of kilowatt-hour meter based on ZigBee wireless transport modules, comprising:Voltage, current transformer, for by the big voltage of measurement, current signal its be converted into small voltage signal；Computation chip, receives electric current, the signal of voltage transformer output, is handled；Process chip, receives the signal of computation chip output, is handled；After the information storage that computation chip is treated, ZigBee sending modules are transferred to；ZigBee receiving modules receive and background interface are passed to after data, carry out data and refresh in real time.
Description
Technical field
Embodiments of the invention relate generally to a kind of kilowatt-hour meter, and more specifically to wireless based on ZigBee
The kilowatt-hour meter of transport module.
Background technology
Electricity plays essential role in the life and work of modern people, and how many point electricity have been generated by electricity power group,
User has used how many electricity, is required for being measured with electric energy meter, so electric energy meter is also common among daily life.Electric energy meter should
It is small to arrive ordinarily resident's cell and factory's electric administrative department greatly to major electricity power groups and power network with quite varied, all use
Electric energy meter, simply its precision and functionally difference.Electricity power group and power network are high to the precision of electric energy meter and functional requirement,
So more using the intelligent electric meter that price is high, function is strong, and ordinarily resident and factory's electric administrative department are required not electric energy meter
Such as Power Group is high, more economical and practical better in the case where meeting certain required precision, then induction type or electronic electric energy meter
It is exactly relatively good selection to be.
From development trend, digital intelligent ammeter can replace traditional electric energy meter, but improving for function will
Along with the rising of cost, particularly when the technology is not also to improve very much, and traditional electric energy meter is ripe already and steady
It is fixed.Under such a background, if improvement can be made on traditional electric energy meter, the partial function of intelligent electric meter, example are realized
Such as monitor the quality of power supply, the inquiry of historical data, electric energy wirelessly to copy and accept, without being substituted for intelligent electric meter.In addition, by whole
Close, one is improved electric energy meter and can monitor the electricity consumption situation at three families simultaneously, and this will save very big financial cost.
From the appearance of First electric energy meter in 1880, away from modern existing more than 100 years history, electric energy meter is mainly measurement electricity
The electric flux consumed in road.The electric energy meter of earliest period is very heavy, and only one just has tens kilogram weights, also has no idea to protect
Demonstrate,prove precision.But at that time, this is also an invention of great significance of scientific and technological circle, and promptly applies in engineering.
The content of the invention
Some or all above-mentioned needs and/or problem can be solved by certain embodiments of the present invention.According to a reality
Example is applied, the present invention discloses a kind of kilowatt-hour meter based on ZigBee wireless transport modules, comprising:Voltage, current transformer, for inciting somebody to action
Measurement big voltage, current signal its be converted into small voltage signal；Computation chip, receives electric current, the letter of voltage transformer output
Number, handled；Process chip, receives the signal of computation chip output, is handled；The information treated by computation chip
After storage, ZigBee sending modules are transferred to；ZigBee receiving modules receive and backstage display interface are passed to after data, carry out data
Refresh in real time.
Optionally, also comprising display screen, the data storage that computation chip processing is obtained internally behind memory block, is shown
On a display screen.
Optionally, the data of display screen are to carry out digital independent by outside MCU.
Optionally, computation chip is used for electric current, voltage, power factor, active power and the electric energy for measuring three-phase.
Optionally, computation chip is also used for measuring single-phase parameter, while measuring three family electricity consumption users.
Optionally, there are DSP processing modules, measuring parameter register inside computation chip, what the computation chip was received
Parameter, after DSP processing modules processing, is stored in different registers.
Optionally, the information for passing to background interface is stored in database to carry out the inquiry of historical data.
Optionally, also comprising Acquisition Circuit, the Acquisition Circuit includes voltage collection circuit and current collection circuit, is used for
Gather ammeter information.
For those skilled in the art, other embodiment, aspect and feature of the invention will from it is following in detail
Describe in detail apparent in bright, accompanying drawing and appended claims.
Brief description of the drawings
Now with reference to accompanying drawing, wherein accompanying drawing is not necessarily drawn to scale, in the accompanying drawings：
Fig. 1 is the part annexation schematic diagram of kilowatt-hour meter of the present invention；
Fig. 2 is metering chip structure schematic diagram in the present invention；
Fig. 3 is the voltage collection circuit schematic diagram in Acquisition Circuit；
Fig. 4 is the current collection circuit schematic diagram in Acquisition Circuit；
Fig. 5 is that tri- kinds of networks of ZigBee open up benefit structure；
Fig. 6 is MCU structural representations；
Fig. 7 is MCU structural representations；
Fig. 8 is liquid crystal display design diagram.
Embodiment
Exemplary embodiment is more fully described below now with reference to accompanying drawing, wherein only show section Example rather than
All embodiments.The present invention can be implemented using many multi-forms, and should not be construed as being limited to illustrate in this manual
Embodiment.In this manual, similar numeral refers to similar component.
Fig. 1 is the part annexation schematic diagram of kilowatt-hour meter of the present invention, by voltage, current transformer by the big electricity of measurement
It is converted into small voltage signal for pressure, current signal, is input to ATT7022 computation chips 11 and is handled, computation chip 11 is handled
Obtained data storage internally memory block, outside MCU carries out the reading of data by SPI interface, and it is included to show
Screen 13 on, can also by Serial Port Transmission to ZigBee sending modules 12, ZigBee receiving modules 15 are received passed to after data after
Platform display interface 16, carries out data and refreshes in real time, and be stored in MySQL database to carry out the inquiry of historical data.
Optionally, using being ATT7022 three phase metering chips, available for the electric current of measurement three-phase, voltage, power factor,
Active power and electric energy, it can also be used to measure single-phase above-mentioned parameter, while measuring three family electricity consumption users.Use
STC90C58AD is as process chip 14, because which employs the generation encryption technology of macrocrystalline the 7th, being compared to 89 be decrypted
Row single-chip microcomputer, its confidentiality, just turning now to that can not crack, is also completely compatible C language on programming language.Use
ZigBee wireless transport module model ZM5168, the advantage using the wireless transmission method be transmission range it is longer, transmission
Stable, networking capability is strong.Interface is completed by software LabVIEW 8.6, and the software is widely used in industrial circle, interface
It hurry up, the program development time is short.Database is set up by MySQL, configuration to data source ODBC and passes through LabVIEW kits
LabSQL, to modify and access.
In the eighties in last century, external developed country begins to use electronic electric energy meter, so market is also external
Some international corporations such as TDK, ADI etc. occupy.After more than ten years, China also begin to introduce electronic electric energy meter technology, and with
The supporting dynamics continued to increase in terms of chip, some the domestic companies made have gradually grasped core technology, pass through reduction
Cost squeezes into computation chip market, and there are Shanghai Belling, Zhuhai torch power etc. in producer more well-known at present.Optionally, the application
Computation chip used in file has structure as shown in Figure 2.
In Fig. 2, V1P, V1N, V3P, V3N, V5P, V5N are the thief hatch of three-phase current, and maximum working voltage is 1.5V；
V2P, V2N, V4P, V4N, V6P, V6N are the thief hatch of three-phase voltage, and maximum working voltage is also 1.5V；OSCI, OSCO are brilliant
The input shaken, output end, crystal oscillator frequency is 24.576MHz；SEL is the selection of working method, phase three-wire three during low level, high electricity
Usually three-phase and four-line；SIG ports will export low level after chip electrification reset, and when external processing unit passes through serial number
Horse back is exported into high level compared with SIG after table data according to interface write-in[19], so being usually used in judging whether calibration data are successfully write
Enter；RESET ports are the resetting pins of chip；CF1, CF2 be respectively have, the output port of reactive energy pulse, for error school
Test；REVP Port detectings to the active power of a certain phase be negative value when, will export high level, and when all phases active power all
For timing, low level state is returned to[19], for providing warning message；Input, the output of DIN, DOUT for serial data, it is main
It is used for and outside MCU is communicated；SCLK inputs for serial clock, and rising edge puts data, trailing edge access evidence；CS selects for piece
Signal, low level is effective；Power management and reference voltage mouth are directly using the application circuit on service manual, and shunt capacitance is gone
Coupling.
Alternatively, there are DSP processing modules, and many measuring parameter registers, computation chip inside the computation chip
The parameter received, after internal DSP processing, is stored in different registers, the access by MCU to different address,
Corresponding parameter can just be read.
Fig. 3 is the voltage collection circuit in Acquisition Circuit, and voltage sampling circuit has three kinds of sample modes：First, electric resistance partial pressure；
2nd, via voltage transformer；3rd, electric current is first converted voltage to, by current transformer, then voltage letter is converted the current to
Number.By the way of transformer, chip is isolated with power network, anti-interference can be greatly improved, but accurately
Degree depends on transformer, and electric resistance partial pressure accuracy is high but anti-interference is not strong, here by the way of current transformer.
Fig. 3 is the voltage collection circuit schematic diagram in Acquisition Circuit, in figure 3, via a current-limiting resistance, by 220V electricity
Pressure is limited in 2mA or so, by 1：After 1 converter, become 0.1V voltage after the resistance for flowing through 50 Ω, meet voltage channel
Voltage effective value 10mV to Linear Error between 1V be less than 0.1% requirement.0.01uF electric capacity and 1.2k Ω resistance below
Play a part of filtering.
Current sample is all carried out by current transformer, and the voltage effective value of current channel is in 2mV to 1V top-stitchings
Property error be less than 0.1%.The application of the design is shown in that Fig. 4, Fig. 4 are the current collection circuit schematic diagrames in Acquisition Circuit.Work as inflow
During 2A electric currents, secondary side current is 1.25mA, and voltage effective value is 62.5mV, meets and requires.
Three kinds of quite varied Radio Transmission Technologys of application are bluetooth, WiFi and ZigBee at present, and three kinds of modes respectively have
Advantage and disadvantage, table 1 is the comparison of three kinds of wireless transmission methods.
1 three kinds of communication contrast tables of table[17]
As seen from the above table, ZigBee wireless transmission distances are farthest, and occupation mode is simple, and security reliability is stronger, but pass
Defeated speed is relatively low, for ammeter, and configured transmission is limited, and the requirement to speed is not very high, but to safety and reliability
It is required that high, signal intensity is high, and transmission range is remote, so, when the ammeter is designed, from the ZigBee sides of being wirelessly transferred
Formula is undoubtedly optimal.
Three kinds of classic networks that Fig. 5 is ZigBee open up benefit structure, are hub-and-spoke configuration, number of clusters type structure and reticular pattern respectively
Structure, some child nodes are managed by a host node, and most host nodes can manage 254 child nodes[24]；While host node
Also the big net of 65000 nodes can at most be constituted by last layer network node control, in the range of whole network, each
It can be in communication with each other between ZigBee-network digital transmission module, the distance between each network node can infinitely expand from the 75m of standard
Exhibition.
Interconnection hub-and-spoke network topology is may be constructed after the either single Star Network extension of the Star Network of two interconnections
Structure, in mesh network topologies structure, each FFD in network (i.e. Full Function Device, also known as global function
Equipment), it can be used simultaneously as router.
The design uses the specific pin function of single-chip microcomputer (MCU) and can referred to shown in table 2 and Fig. 6.
The MCU pin assignment tables of table 2
Have and what time be worth noting：P4.0-P4.4 is not connected with, and P0 and P1 mouthfuls need to add pull-up resistor；Used
12864 be the LCDs with character library, and operating voltage is 5V, if selection work voltage can not be just for 3.3V liquid crystal display
Often work, or even burnt；DS1302 is the clock chip of one piece of low-power consumption, for carrying out timing to the time；AT24C02 is
One piece of E2PROM, the expansion for data is stored；S9013 is NPN type low-power transistor, and it plays a part of switch, control
The light on and off of liquid crystal display backlight.
According to the characteristic of this chip, P0 and P1 mouthfuls need to add pull-up resistor, as shown in Figure 7.
Because industrial circle is frequently with RS-232 communication modes, so MAX3232 chips are added here, single-chip microcomputer is defeated
The Transistor-Transistor Logic level gone out is converted into the RS232 level that PC can be received.Using 12864 liquid crystal displays, P1.0, P1.1, P1.2 are control
Signal input pin, P2.0-P2.7 is data-signal input pin, and P0.6 is reset signal input pin, P0.7 control LCD backlights
Light on and off, as shown in Figure 8.
Although carrying out language description for architectural feature and/or method behavior, it should be appreciated that the present invention is not limited to
The special characteristic or behavior.On the contrary, disclosed special characteristic and behavior is the exemplary implementation as embodiment.
Claims (8)
1. a kind of kilowatt-hour meter based on ZigBee wireless transport modules, it is characterised in that include:
Voltage, current transformer, for by the big voltage of measurement, current signal its be converted into small voltage signal；
Computation chip, receives the electric current, the signal of voltage transformer output, is handled；
Process chip, receives the signal of the computation chip output, is handled；
After the information storage that the computation chip is treated, ZigBee sending modules are transferred to；
ZigBee receiving modules receive and backstage display interface are passed to after data, carry out data and refresh in real time.
2. the kilowatt-hour meter as claimed in claim 1 based on ZigBee wireless transport modules, it is characterised in that also comprising display
Screen, the data storage that the computation chip processing is obtained internally behind memory block, it is included on the display screen.
3. the kilowatt-hour meter as claimed in claim 2 based on ZigBee wireless transport modules, it is characterised in that the display screen
Data are to carry out digital independent by outside MCU.
4. the kilowatt-hour meter as claimed in claim 1 based on ZigBee wireless transport modules, it is characterised in that the computation chip
Electric current, voltage, power factor, active power and electric energy for measuring three-phase.
5. the kilowatt-hour meter as claimed in claim 4 based on ZigBee wireless transport modules, it is characterised in that the computation chip
It is also used for measuring single-phase parameter, while measuring three family electricity consumption users.
6. the kilowatt-hour meter as claimed in claim 1 based on ZigBee wireless transport modules, it is characterised in that the computation chip
There are DSP processing modules, measuring parameter register, the parameter that the computation chip is received, by the DSP processing modules in inside
After processing, it is stored in different registers.
7. the kilowatt-hour meter as claimed in claim 1 based on ZigBee wireless transport modules, it is characterised in that pass to the backstage
The information at interface is stored in database to carry out the inquiry of historical data.
8. the kilowatt-hour meter as claimed in claim 1 based on ZigBee wireless transport modules, it is characterised in that also comprising collection electricity
Road, the Acquisition Circuit includes voltage collection circuit and current collection circuit, for gathering ammeter information.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710110612.XA CN107015056A (en) | 2017-02-28 | 2017-02-28 | A kind of kilowatt-hour meter based on ZigBee wireless transport modules |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710110612.XA CN107015056A (en) | 2017-02-28 | 2017-02-28 | A kind of kilowatt-hour meter based on ZigBee wireless transport modules |
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| CN107015056A true CN107015056A (en) | 2017-08-04 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062814A (en) * | 2009-11-16 | 2011-05-18 | 上海安科瑞电气股份有限公司 | ZIGBEE technology-based three-phase guide rail-type installed electric energy meter |
| CN202256488U (en) * | 2011-09-22 | 2012-05-30 | 苏州卡泰克电子科技有限公司 | Intelligent household appliance multi-parameter measurement electricity meter for household energy consumption management |
| CN103018551A (en) * | 2012-12-13 | 2013-04-03 | 青岛乾程电子科技有限公司 | Single-phase intelligent electric energy meter with ZigBee communication module |
| CN203433041U (en) * | 2013-09-04 | 2014-02-12 | 厦门理工学院 | An electric energy meter provided with a communication function |
-
2017
- 2017-02-28 CN CN201710110612.XA patent/CN107015056A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062814A (en) * | 2009-11-16 | 2011-05-18 | 上海安科瑞电气股份有限公司 | ZIGBEE technology-based three-phase guide rail-type installed electric energy meter |
| CN202256488U (en) * | 2011-09-22 | 2012-05-30 | 苏州卡泰克电子科技有限公司 | Intelligent household appliance multi-parameter measurement electricity meter for household energy consumption management |
| CN103018551A (en) * | 2012-12-13 | 2013-04-03 | 青岛乾程电子科技有限公司 | Single-phase intelligent electric energy meter with ZigBee communication module |
| CN203433041U (en) * | 2013-09-04 | 2014-02-12 | 厦门理工学院 | An electric energy meter provided with a communication function |
Non-Patent Citations (2)
| Title |
|---|
| 吴昕: "基于ZigBee短距离无线通信的三相智能电表系统的设计", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
| 王凌云 等: "基于ATT7022C 的电力参数无线监控系统的设计", 《电子测量技术》 * |
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Application publication date: 20170804 |