CN203433041U - An electric energy meter provided with a communication function - Google Patents
An electric energy meter provided with a communication function Download PDFInfo
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- CN203433041U CN203433041U CN201320548033.0U CN201320548033U CN203433041U CN 203433041 U CN203433041 U CN 203433041U CN 201320548033 U CN201320548033 U CN 201320548033U CN 203433041 U CN203433041 U CN 203433041U
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Abstract
The utility model discloses an electric energy meter provided with a communication function and relates to an electric energy meter. The electric energy meter provided with a communication function is equipped with a communication interface so as to be capable of transmitting signals to a PC in real time. Therefore, the PC may acquire and monitor signals in real time. The electric energy meter is provided with current and voltage acquiring modules, a metering chip, a microprocessor, a communication module, a display module, and an EEPROM. The current and voltage acquiring modules comprise a phase-A current and voltage acquiring module, a phase-B current and voltage acquiring module, and a phase-C current and voltage acquiring module. The output end of the phase-A current and voltage acquiring module, the output end of phase-B current and voltage acquiring module, and the output end of the phase-C current and voltage acquiring module are connected with the input ends of the metering chip. The metering chip is connected with the microprocessor. The processing signal output end of the microprocessor is connected with the input end of the communication module, the input end of the display module, and the input end of the EEPROM. The electric energy meter is provided with an anti-electricity-stealing function so as to be capable of preventing electricity-stealing behaviors achieved by short circuit, external magnetic field, and meter inclination.
Description
Technical field
The utility model relates to electric energy meter, especially relates to a kind of electric energy meter with communication function.
Background technology
Along with the development that mechanics of communication and intelligent grid " informationization, robotization, interactive " are built, the limitation that traditional manual metering exists is more and more obvious.We wish on PC, to obtain data in real time, and equipment is carried out to monitoring in real time.We just need electric energy meter with communication function like this, can be interconnected with PC.
In order to realize this design with communication function electric energy meter, need to possess the knowledge of intelligent instrument principle and design and mechanics of communication aspect.
What at present, existing electric energy meter mainly solved on the market is metering single-phase, three-phase electric energy; Demonstration on the LCD of electric energy reading on electric energy meter; Single-phase plug-in power measurement and demonstration.Do not have SPI communication function in real time reading out data to computer, process.
Chinese patent CN202393826U discloses a kind of single-phase electronic energy meter.This electric energy meter can measure single-phase electric energy, LED shows electric energy.There is high precision, wide load, low-power consumption, the advantage such as reliable.But it can only measure single-phase electric energy, there is no communication function.
Chinese patent CN202404135U discloses a kind of three-phase and four-line remote monitoring electric energy meter.This electric energy meter utilizes GPRS communication, energy remote transmission signal, long distance of signal transmission, the advantages such as broad covered area.But it takies GPRS channel, and cost is high, narrow application range.
Chinese patent CN202362374U discloses a kind of three-phase and four-line electronic type active electric energy meter.That this electric energy meter can measure is meritorious, LED shows energy data, has the advantages such as low-power consumption, easy installation.But it does not have communication function, can not to computer, analyze by real-time transmission data.
Summary of the invention
The purpose of this utility model is do not have communication function for existing electric energy meter, shortcoming that can not be interconnected with PC, provide and there is communication interface, can, in real time to PC signal transmission, make a kind of electric energy meter with communication function of PC energy Real-time Collection signal and pilot signal.
The utility model is provided with current/voltage acquisition module, computation chip, microprocessor (MCU module), communication module, display module and EEPROM;
Described current/voltage acquisition module comprises A phase current voltage acquisition module, B phase current voltage acquisition module and C phase current voltage acquisition module; The output terminal of A phase current voltage acquisition module, B phase current voltage acquisition module and C phase current voltage acquisition module connects respectively the input end of computation chip, computation chip is connected with microprocessor (MCU module), and the processing signals output terminal of microprocessor (MCU module) is connected with the input end of communication module, display module and EEPROM respectively.
Described computation chip is provided with electric current and voltage simulating signal sampling module, DSP metering module, pulse producer, SPI communication interface, clock control circuit, temperature sensor, reference voltage module and power management module, the input termination A phase current voltage acquisition module of electric current and voltage simulating signal sampling module, the output terminal of B phase current voltage acquisition module and C phase current voltage acquisition module, the input end of the output termination DSP metering module of electric current and voltage simulating signal sampling module, the output terminal of DSP metering module connects respectively the input end of pulse producer and SPI communication interface, clock control circuit is connected with crystal oscillating circuit, SPI communication interface is connected with microprocessor (MCU module), the output termination electric current and voltage simulating signal sampling module of temperature sensor, reference voltage module is connected with temperature sensor with electric current and voltage simulating signal sampling module respectively, power management module provides power supply for chip.
The utlity model has following technique effect:
The utility model provides a kind of electric energy meter with communication function, electric energy meter with communication function is the element of all remote meter readings or control system, communication of the present utility model adopts spi bus, spi bus can transmit data by serial line interface with outside MCU, and be full duplex communication, do not need addressing operation, make communication more simple efficient.
The utility model is realized well computer and is concentrated image data, and to the real-time monitoring of equipment electric energy, ammeter infield is more flexible simultaneously, and data acquisition is more accurate.To a great extent, installation cost and the manpower financial capacity's loss that has reduced manual metering have been saved.In addition, the utlity model has anti-stealing electricity function, can prevent the electricity filching behaviors such as fraudulent use electricity by short-circuit, externally-applied magnetic field, inclination ammeter.
Accompanying drawing explanation
Fig. 1 is the structure composition frame chart of the utility model embodiment.
Fig. 2 is the structure composition frame chart of the computation chip of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated, thereby so that advantage of the present utility model and feature can more easily be those skilled in the art will recognize that protection domain of the present utility model is made to clearer and more definite defining.
Referring to Fig. 1 and 2, the utility model embodiment is provided with current/voltage acquisition module 1, computation chip 2, microprocessor (MCU module) 3, communication module 4, display module 5 and EEPROM6.
Described current/voltage acquisition module 1 comprises A phase current voltage acquisition module 11, B phase current voltage acquisition module 12 and C phase current voltage acquisition module 13; The output terminal of A phase current voltage acquisition module 11, B phase current voltage acquisition module 12 and C phase current voltage acquisition module 13 connects respectively the input end of computation chip 2, computation chip 2 is connected with microprocessor (MCU module) 3, and the processing signals output terminal of microprocessor (MCU module) 3 is connected with the input end of communication module 4, display module 5 and EEPROM6 respectively.
Described computation chip 2 is provided with electric current and voltage simulating signal sampling module 21, DSP metering module 22, pulse producer 23, SPI communication interface 24, clock control circuit 25, temperature sensor 26, reference voltage module 27 and power management module 28, the input termination A phase current voltage acquisition module 11 of electric current and voltage simulating signal sampling module 21, the output terminal of B phase current voltage acquisition module 12 and C phase current voltage acquisition module 13, the input end of the output termination DSP metering module 22 of electric current and voltage simulating signal sampling module 21, the output terminal of DSP metering module 22 connects respectively the input end of pulse producer 23 and SPI communication interface 24, clock control circuit 25 is connected with crystal oscillating circuit 7, SPI communication interface 24 is connected with microprocessor (MCU module) 3, the output termination electric current and voltage simulating signal sampling module 21 of temperature sensor 26, reference voltage module 27 is connected with temperature sensor 26 with electric current and voltage simulating signal sampling module 21 respectively, power management module 28 provides power supply for chip.
Except the selection of chip, also need peripheral circuit to design, peripheral circuit comprises the design of voltage divider and shunt, the voltage and current that the effect of voltage divider shunt is is small-signal alternating voltage and current conversion.Isolate line voltage and electric current simultaneously.Pulse producer has been mainly used in rated output, integration, the functions such as frequency computation part.
The design of relevant communication interface, the utility model adopts spi bus interface, and spi bus system is a kind of synchronous serial Peripheral Interface, and it can make MCU and various peripherals communicate with exchange message with serial mode.
By software verification electric energy meter, can effectively improve its precision.
It is electric current by voltage transitions that sampled voltage input can adopt electric resistance partial pressure type, then current conversion, is voltage by current transformer.Zero line and reference voltage output are coupled together, conveniently sampled signal is superimposed upon on bias direct current.By zero line and chip be connected for power supply sampling autotransformer application scenario.Current sample completes by current transformer.
The design relation of power circuit is to the Electro Magnetic Compatibility of product.Comprise that supply voltage will remain within the scope of specification error, at output terminal, select suitable filter capacitor, the filter resistance of rationally arranging, voltage dependent resistor (VDR) and electric capacity make it to guarantee good filter effect and Electro Magnetic Compatibility.
Relevant SPI Interface design, SPI connection should be short as far as possible, makes the interference of transmission signal line as far as possible little, at input end, adds low-pass filter circuit to eliminate high frequency interference, selects suitable decoupling capacitor to carry out the antijamming capability of increasing circuit.Single-chip microcomputer must be monitored SPI port, to guarantee metering accuracy.
The program of SPI communication writes.
SPI writes sequential:
The verification of electric energy meter adopts the method for calibration of pure software, comprises two parts of ratio verification and angular difference verification.Ratio verification is that the ratio of mutual inductor is revised, and angular difference verification is that mutual inductor angular difference is carried out to verification, and these two kinds of methods are all that segmentation is carried out.
By above implementation step, can realize the design to a kind of electric energy meter with communication function, electric energy meter with communication function can be analyzed real-time the passing on computer of energy information, the utility model is also the infrastructure device of some remote meter system, have many uses, have practical significance widely.
Claims (2)
1. with an electric energy meter for communication function, it is characterized in that being provided with current/voltage acquisition module, computation chip, microprocessor, communication module, display module and EEPROM;
Described current/voltage acquisition module comprises A phase current voltage acquisition module, B phase current voltage acquisition module and C phase current voltage acquisition module; The output terminal of A phase current voltage acquisition module, B phase current voltage acquisition module and C phase current voltage acquisition module connects respectively the input end of computation chip, computation chip is connected with microprocessor, and the processing signals output terminal of microprocessor is connected with the input end of communication module, display module and EEPROM respectively.
2. a kind of electric energy meter with communication function as claimed in claim 1, is characterized in that described computation chip is provided with electric current and voltage simulating signal sampling module, DSP metering module, pulse producer, SPI communication interface, clock control circuit, temperature sensor, reference voltage module and power management module, the input termination A phase current voltage acquisition module of electric current and voltage simulating signal sampling module, the output terminal of B phase current voltage acquisition module and C phase current voltage acquisition module, the input end of the output termination DSP metering module of electric current and voltage simulating signal sampling module, the output terminal of DSP metering module connects respectively the input end of pulse producer and SPI communication interface, clock control circuit is connected with crystal oscillating circuit, SPI communication interface is connected with microprocessor, the output termination electric current and voltage simulating signal sampling module of temperature sensor, reference voltage module is connected with temperature sensor with electric current and voltage simulating signal sampling module respectively, power management module provides power supply for chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320548033.0U CN203433041U (en) | 2013-09-04 | 2013-09-04 | An electric energy meter provided with a communication function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320548033.0U CN203433041U (en) | 2013-09-04 | 2013-09-04 | An electric energy meter provided with a communication function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203433041U true CN203433041U (en) | 2014-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320548033.0U Expired - Fee Related CN203433041U (en) | 2013-09-04 | 2013-09-04 | An electric energy meter provided with a communication function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249046A (en) * | 2016-07-18 | 2016-12-21 | 柳州好顺科技有限公司 | A kind of signals collecting metering module |
| CN106291087A (en) * | 2016-07-18 | 2017-01-04 | 柳州好顺科技有限公司 | A kind of electric meter signal gathers metering module |
| CN107015056A (en) * | 2017-02-28 | 2017-08-04 | 厦门理工学院 | A kind of kilowatt-hour meter based on ZigBee wireless transport modules |
-
2013
- 2013-09-04 CN CN201320548033.0U patent/CN203433041U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249046A (en) * | 2016-07-18 | 2016-12-21 | 柳州好顺科技有限公司 | A kind of signals collecting metering module |
| CN106291087A (en) * | 2016-07-18 | 2017-01-04 | 柳州好顺科技有限公司 | A kind of electric meter signal gathers metering module |
| CN107015056A (en) * | 2017-02-28 | 2017-08-04 | 厦门理工学院 | A kind of kilowatt-hour meter based on ZigBee wireless transport modules |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140212 Termination date: 20160904 |
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| CF01 | Termination of patent right due to non-payment of annual fee |