CN203037755U - Programmable intelligent network electric power meter - Google Patents
Programmable intelligent network electric power meter Download PDFInfo
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- CN203037755U CN203037755U CN 201220619168 CN201220619168U CN203037755U CN 203037755 U CN203037755 U CN 203037755U CN 201220619168 CN201220619168 CN 201220619168 CN 201220619168 U CN201220619168 U CN 201220619168U CN 203037755 U CN203037755 U CN 203037755U
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- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to a programmable intelligent network electric power meter which comprises a three-phase current transformer, a three-phase voltage transformer and a MCU and is characterized in that the output ends of the three-phase current transformer and the three-phase voltage transformer are connected with a digital signal processing DSP through an analog signal sampling circuit, one output of the digital signal processing DSP controls a photoelectric isolation circuit through a pulse generator, the other output of the digital signal processing DSP is connected with the MCU through an SPI communication interface, the output end of the photoelectric isolation circuit is connected with an electric energy pulse output module, and the MCU is further connected with a display module, a keying circuit, an alarm analog output circuit and an RS485 communication module. The programmable intelligent network electric power meter is simple in circuit structure, can be used for realizing networked management and version update and has a good practical value.
Description
Technical field
The utility model relates to the electric instrument technical field, particularly a kind of programmable, intelligent network electric power instrument.
Background technology
Electric instrument plays an important role at power domain as power measurement and opertaing device, but the existing power instrument exists more shortcoming, and for example: 1, the instrument program function can not be upgraded; 2, instrument does not possess Network Management Function, only uses as survey instrument; 3, appliance circuit complexity; 4, power down loss of data; 5, the parameter measured of electrical network is single etc.Therefore, providing a kind of has the programmable, intelligent network electric power instrument and is necessary.
Summary of the invention
In view of this, the purpose of this utility model provides a kind of programmable, intelligent network electric power instrument, can realize network management and version updating.
The utility model adopts following scheme to realize: a kind of programmable, intelligent network electric power instrument comprises threephase current transformer, threephase potential transformer and a MCU; It is characterized in that: the output terminal of described threephase current transformer and threephase potential transformer is connected with a digital signal processing DSP through the simulating signal sample circuit; Described digital signal processing DSP one tunnel output is controlled a photoelectric isolating circuit through an impulse generator, and another road output is connected with described MCU through the SPI communication interface; The output terminal of described photoelectric isolating circuit connects an electrical energy pulse output module; Described MCU also is connected with display module, key circuit, warning analogue quantity output circuit and RS485 communication module.
In the utility model one embodiment, described simulating signal sample circuit, digital signal processing DSP, impulse generator and SPI communication interface circuit substitute with an ATT7026 computation chip, this ATT7026 computation chip input end is connected with the output terminal of described threephase current transformer and threephase potential transformer, one output terminal of this ATT7026 computation chip is controlled described photoelectric isolating circuit, and another output terminal is connected with described MCU.
In the utility model one embodiment, described display module is digital display module.
The utility model circuit structure is simple, possess network management and version programming update functions, and its inner electric energy metrical module in addition, by instantaneous power the integration of time is obtained active energy, reactive energy, and can pass through pulse producer outputting standard electrical energy pulse, after light-coupled isolation, offer secondary instrument and use.Has good practical values.
Description of drawings
Fig. 1 is the utility model schematic block circuit diagram.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.
As shown in Figure 1, present embodiment provides a kind of programmable, intelligent network electric power instrument, comprises threephase current transformer, threephase potential transformer and a MCU; It is characterized in that: the output terminal of described threephase current transformer and threephase potential transformer is connected with a digital signal processing DSP through the simulating signal sample circuit; Described digital signal processing DSP one tunnel output is controlled a photoelectric isolating circuit through an impulse generator, and another road output is connected with described MCU through the SPI communication interface; The output terminal of described photoelectric isolating circuit connects an electrical energy pulse output module; Described MCU also is connected with display module, key circuit, warning analogue quantity output circuit and RS485 communication module.
Please continue with reference to Fig. 1, empty frame part among Fig. 1, be that described simulating signal sample circuit, digital signal processing DSP, impulse generator and SPI communication interface circuit substitute with an ATT7026 computation chip, this ATT7026 computation chip input end is connected with the output terminal of described threephase current transformer and threephase potential transformer, one output terminal of this ATT7026 computation chip is controlled described photoelectric isolating circuit, and another output terminal is connected with described MCU.
In order to allow those skilled in the art better understand the utility model, principle of work to above-described embodiment is described further below, three-phase current and three-phase voltage are respectively by current transformer and voltage transformer (VT), obtain exchanging the millivolt small-signal, through the sampled signal input end of input computation chip ATT7026 behind the frequency overlapped-resistable filter.16 A/D converters of ATT7026 inside can convert analog quantity to digital signal, obtain active power, reactive power, applied power, current effective value, voltage effective value, power factor, a plurality of electrical network parameters such as frequency.It is inner to also have electric energy metrical module, by instantaneous power the integration of time is obtained active energy, reactive energy, and can pass through pulse producer outputting standard electrical energy pulse, after light-coupled isolation, offer the secondary instrument use.Be responsible for carrying out SPI with ATT7026 based on the MCU of the Cortex-M3 of ARM company kernel and communicate by letter, write and proofread parameter and read measured value, and show by charactron.The button input on the reading displayed panel simultaneously realizes the switching of the page and the input of parameter is set.MCU includes serial communication function, and serial ports transmitting-receiving pin and enable pin are isolated the back by signal and inserted level shifting circuit, can realize and the RS485 communication function of external unit, makes things convenient for check and correction, network management and programming to upgrade.MCU has also comprised the function of overload alarm and analog quantity output, by to the control of relay and the modulation of pwm signal, realizes reporting to the police and output function is sent in change.MCU includes the function of power down storage, can preserve setting and the accumulated value of last time under the situation of unexpected power down, in order to recover in power supply next time.What deserves to be mentioned is, when requirements at the higher level such as needs harmonic measure, tri-phase unbalance factor measurement, also can be by directly changing the compatible fully ATT7022 chip of PIN pin, software is identified and is disposed the realization three phase harmonic automatically and measures.
The above only is preferred embodiment of the present utility model, and all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (3)
1. a programmable, intelligent network electric power instrument comprises threephase current transformer, threephase potential transformer and a MCU; It is characterized in that: the output terminal of described threephase current transformer and threephase potential transformer is connected with a digital signal processing DSP through the simulating signal sample circuit; Described digital signal processing DSP one tunnel output is controlled a photoelectric isolating circuit through an impulse generator, and another road output is connected with described MCU through the SPI communication interface; The output terminal of described photoelectric isolating circuit connects an electrical energy pulse output module; Described MCU also is connected with display module, key circuit, warning analogue quantity output circuit and RS485 communication module.
2. programmable, intelligent network electric power instrument according to claim 1, it is characterized in that: described simulating signal sample circuit, digital signal processing DSP, impulse generator and SPI communication interface circuit substitute with an ATT7026 computation chip, this ATT7026 computation chip input end is connected with the output terminal of described threephase current transformer and threephase potential transformer, one output terminal of this ATT7026 computation chip is controlled described photoelectric isolating circuit, and another output terminal is connected with described MCU.
3. programmable, intelligent network electric power instrument according to claim 1, it is characterized in that: described display module is digital display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220619168 CN203037755U (en) | 2012-11-21 | 2012-11-21 | Programmable intelligent network electric power meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220619168 CN203037755U (en) | 2012-11-21 | 2012-11-21 | Programmable intelligent network electric power meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203037755U true CN203037755U (en) | 2013-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220619168 Expired - Lifetime CN203037755U (en) | 2012-11-21 | 2012-11-21 | Programmable intelligent network electric power meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN203037755U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630778A (en) * | 2013-11-22 | 2014-03-12 | 中国电子科技集团公司第三十八研究所 | Module for quickly collecting three-phase electrical parameters |
| CN105319462A (en) * | 2015-07-30 | 2016-02-10 | 成都华立达电力信息***有限公司 | Stable and high-efficient alternating-current sampling device |
| CN106249075A (en) * | 2016-07-22 | 2016-12-21 | 安徽亚辉电气自动化有限公司 | A kind of control system of multifunctional electric meter |
-
2012
- 2012-11-21 CN CN 201220619168 patent/CN203037755U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630778A (en) * | 2013-11-22 | 2014-03-12 | 中国电子科技集团公司第三十八研究所 | Module for quickly collecting three-phase electrical parameters |
| CN103630778B (en) * | 2013-11-22 | 2016-01-20 | 中国电子科技集团公司第三十八研究所 | Three phase electrical parameters Quick Acquisition module |
| CN105319462A (en) * | 2015-07-30 | 2016-02-10 | 成都华立达电力信息***有限公司 | Stable and high-efficient alternating-current sampling device |
| CN106249075A (en) * | 2016-07-22 | 2016-12-21 | 安徽亚辉电气自动化有限公司 | A kind of control system of multifunctional electric meter |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130703 |
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| CX01 | Expiry of patent term |