CN105182144A - Multifunctional power network instrument - Google Patents
Multifunctional power network instrument Download PDFInfo
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- CN105182144A CN105182144A CN201510699941.3A CN201510699941A CN105182144A CN 105182144 A CN105182144 A CN 105182144A CN 201510699941 A CN201510699941 A CN 201510699941A CN 105182144 A CN105182144 A CN 105182144A
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Abstract
The invention relates to the technical field of medium-low voltage power parameter measurement equipment, and particularly relates to a multifunctional power network instrument. The instrument comprises a three-phase voltage and current collection circuit, a data processing circuit, a display unit and a power supply circuit, wherein the three-phase voltage and current collection circuit is used for collecting voltage and current of a power grid; the data processing circuit comprises a chip MSP430F149; the data processing circuit is used for receiving and processing data output by the three-phase voltage and current collection circuit and displaying the data on the display unit; and the power supply circuit is used for supplying power to the three-phase voltage and current collection circuit, the data processing circuit and the display unit. The instrument has multiple functions, can be used for centralized measurement of voltage, current, electric energy, phase position, frequency, harmonic wave, active and reactive power, active and reactive electrical degree, power factors and other multiple parameters, so that the cable distribution configuration of a measurement system can be simplified, the reliability and maintainability of the system can be improved.
Description
Technical field
The present invention relates to mesolow electric parameter measurement equipment technical field, particularly a kind of multifunction power network instrument.
Background technology
For a long time, various parameters in electric system have corresponding special ammeter, its major function is one-parameter display and record, still the feature of simple function, single parameter is not departed from, make electric system wiring configuration too numerous and jumbled, operation automaticity is low, troubleshooting and maintenance all more difficult.
Summary of the invention
The object of the present invention is to provide a kind of diverse in function, automaticity high and be convenient to the multifunction power network instrument of maintenance upgrade.
For realizing above object, the technical solution used in the present invention is: a kind of multifunction power network instrument, comprises three-phase voltage current Acquisition Circuit, data processing circuit, display unit and power circuit; Described three-phase voltage current Acquisition Circuit is for gathering the voltage and current of electrical network; Data processing circuit comprises chip MSP430F149, and data processing circuit receives the data of three-phase voltage current Acquisition Circuit output and shows on the display unit after process; Power circuit is that three-phase voltage current Acquisition Circuit, data processing circuit and display unit are powered.
Compared with prior art, there is following technique effect in the present invention: instrument of the present invention can accomplish a-table-multi-purpose, can concentrate the many kinds of parameters such as measuring voltage, electric current, electric energy, phase place, frequency, harmonic wave, active reactive power, active reactive electric degree, power factor; The wiring configuration of simplified measurement system, strengthens reliability, the maintainability of system.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention;
Fig. 2-1 to Fig. 2-23 is physical circuit figure of the present invention.
Embodiment
Below in conjunction with Fig. 1 to Fig. 2-23, the present invention is described in further detail.
Consult Fig. 1, a kind of multifunction power network instrument, comprise three-phase voltage current Acquisition Circuit 10, data processing circuit 20, power circuit 30 and display unit 40; Described three-phase voltage current Acquisition Circuit 10 is for gathering the voltage and current of electrical network; Data processing circuit 20 comprises chip MSP430F149, and data processing circuit 20 receives the data of three-phase voltage current Acquisition Circuit 10 output and shows on display unit 40 after process; Power circuit 30 is powered for three-phase voltage current Acquisition Circuit 10, data processing circuit 20 and display unit 40.Along with microprocessor and the develop rapidly of DSP technology and the continuous decline of price thereof, traditional Electronic Design concept just progressively changes. on the one hand instrument and meter is more and more intelligent, on the other hand originally many functions completed by hardware replaced by the software operated on microprocessor or dsp chip.In the present invention, the data processing circuit 20 formed by chip MSP430F149, the information that three-phase voltage current Acquisition Circuit 10 can be collected carries out processing and showing, make instrument to accomplish a-table-multi-purpose, the many kinds of parameters such as measuring voltage, electric current, electric energy, phase place, frequency, harmonic wave, active reactive power, active reactive electric degree, power factor can be concentrated; The wiring configuration of simplified measurement system, strengthens reliability, the maintainability of system.
For display unit 40, consider that this instrument is main in the face of industrial market, for brightness and visual consideration, have employed 4 rows and often arrange 48 segment encode LED numeral method designs.
Preferably, comprise push-button unit 50, user realizes optimum configurations, the cyclic query of power measurement parameter and the work of instrument calibration alternately by push-button unit 50 and instrument.By arranging push-button unit 50, user and instrument can be facilitated to carry out alternately.
Preferably, comprise communicating circuit 60, communicating circuit 60 comprises RS485 communication interface, and communicating circuit 60 uses MODBUS communications protocol and its communication baud rate is 2400-19200; Data after described data processing circuit 20 processes are uploaded to host computer by communicating circuit 60.By arranging communicating circuit 60, the electric power data of each power node can be sent to host computer in real time, realizing host computer Real-Time Monitoring, process, in automated system, having good application prospect.
Preferably, described three-phase voltage current Acquisition Circuit 10 comprises chip ATT7022C and peripheral circuit thereof; Described power circuit 30 comprises temperature-sensitive and pressure-active element, common-mode filter, LC filtering circuit, and temperature-sensitive and pressure-active element are for suppressing electrical network interference stability power supply, and common-mode filter and LC filtering circuit are for suppressing conduct radiation to meet electromagnetic compatibility demand.
Fig. 2-1 to Fig. 2-23 is circuit diagrams that this instrument is concrete, owing to clearly illustrating the annexation of each components and parts in circuit diagram, just repeats no more here.It is pointed out that the implementation of circuit is various, only provide the comparatively preferred mode of one for reference here.
In Fig. 2, three-phase voltage current Acquisition Circuit 10 is made up of accurate voltage mutual inductor, precision current transformer and high precision three-phase electric energy the special metering IC ATT7022C etc.ATT7022C is a high precision three-phase electric energy the special metering IC, be applicable to phase three-wire three and three-phase and four-line, it is integrated with the digital signal processing of reference voltage circuit and all power, energy, effective value and frequency measurement, supports the gain in digital territory, phase correction.Signal is passed to ATT70022C by precision transformer and differential resistance potential-divider network and is carried out data processing by three-phase current, voltage.In order to obtain good Electro Magnetic Compatibility, good PCB cabling is basic guarantee.First will notice that components and parts distribution will notice that strong, weak signal is separated; The performance of connection to electromagnetic compatibility of the second ground wire plays a very important role, and the input of suggestion power module of voltage regulation is connected with ground single-point, ensures the interference of being scurried into whole system by power supply to greatest extent; 3rd ATT7022 has multiple power sources VCC, AVCC, and that will note chip when connecting up in analog will ground connection nearby with numeral the, does not distinguish, reduce resistance, inductance and the capacitance profile on ground wire as far as possible; 4th chip REFCAP pin is chip internal simulation part reference voltage pin, and it is very large to Accuracy, and external filter capacitor can improve the stability of reference voltage; Five-way normal pulse output line cabling is longer, so current-limiting resistance will be tried one's best near chip; 6th crystal oscillator is high-frequency signal, distributes in large area near it, does not have other signal wire to pass from centre.
One 16 low-power microprocessor MSP430F149 that data processing circuit 20 adopts TI company designs to produce, this single-chip microcomputer have employed current most popular reduced instruction set computer (RISC) structure, 1 clock period can perform 1 instruction (traditional MCS51 single-chip microcomputer wants 12 clock period just can perform 1 instruction), make MSP430 when 5MHz crystal oscillator works, instruction speed can reach the instruction speed that 8MIPS(notes same 8MIPS, and in operational performance, 16 bit processors are higher than 8 bit processors is far above 2 times).This part have also been devised house dog in power-fail detection circuit bonding pad can make circuit performance safety and reliability by Software for Design.Use SPI pattern to carry out data transmission between MCU and ATT7022C, desired data is passed in MCU and carry out calculating and processing.This part EEPROM adopts AT24C256 chip, and for the storage of Electric energy accumulation amount and part bottom parameter, it is erasable that this chip can carry out 1,000,000 secondary data, and data can preserve 100 years.
Claims (5)
1. a multifunction power network instrument, is characterized in that: comprise three-phase voltage current Acquisition Circuit (10), data processing circuit (20), power circuit (30) and display unit (40); Described three-phase voltage current Acquisition Circuit (10) is for gathering the voltage and current of electrical network; Data processing circuit (20) comprises chip MSP430F149, and the data that data processing circuit (20) reception three-phase voltage current Acquisition Circuit (10) exports also above show at display unit (40) after process; Power circuit (30) is three-phase voltage current Acquisition Circuit (10), data processing circuit (20) and display unit (40) power supply.
2. multifunction power network instrument as claimed in claim 1, it is characterized in that: comprise push-button unit (50), user realizes optimum configurations, the cyclic query of power measurement parameter and the work of instrument calibration alternately by push-button unit (50) and instrument.
3. multifunction power network instrument as claimed in claim 1, it is characterized in that: comprise communicating circuit (60), communicating circuit (60) comprises RS485 communication interface, and communicating circuit (60) uses MODBUS communications protocol and its communication baud rate is 2400-19200; Data after described data processing circuit (20) process are uploaded to host computer by communicating circuit (60).
4. multifunction power network instrument as claimed in claim 1, is characterized in that: described three-phase voltage current Acquisition Circuit (10) comprises chip ATT7022C and peripheral circuit thereof.
5. multifunction power network instrument as claimed in claim 1, it is characterized in that: described power circuit (30) comprises temperature-sensitive and pressure-active element, common-mode filter, LC filtering circuit, temperature-sensitive and pressure-active element are for suppressing electrical network interference stability power supply, and common-mode filter and LC filtering circuit are for suppressing conduct radiation to meet electromagnetic compatibility demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510699941.3A CN105182144A (en) | 2015-10-26 | 2015-10-26 | Multifunctional power network instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510699941.3A CN105182144A (en) | 2015-10-26 | 2015-10-26 | Multifunctional power network instrument |
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| CN105182144A true CN105182144A (en) | 2015-12-23 |
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| CN201510699941.3A Pending CN105182144A (en) | 2015-10-26 | 2015-10-26 | Multifunctional power network instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337745A (en) * | 2020-03-18 | 2020-06-26 | 石家庄德堃电子科技有限公司 | Multifunctional three-phase power meter containing multiple harmonic measurement |
| CN111343066A (en) * | 2020-03-18 | 2020-06-26 | 中国舰船研究设计中心 | Anti-interference design method of power distribution information acquisition device |
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| WO2012059061A1 (en) * | 2010-11-04 | 2012-05-10 | 武汉国测恒通智能仪器有限公司 | Method and device for quality-monitoring of high-voltage electrical energy |
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| CN203216988U (en) * | 2013-05-13 | 2013-09-25 | 哈尔滨国力电气有限公司 | Multifunctional electric power meter |
| CN103383410A (en) * | 2013-07-02 | 2013-11-06 | 重庆跃腾电器有限公司 | Multifunctional power meter |
| CN205049673U (en) * | 2015-10-26 | 2016-02-24 | 合肥科菲电气技术有限公司 | Multi -functional power network instrument |
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2015
- 2015-10-26 CN CN201510699941.3A patent/CN105182144A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012059061A1 (en) * | 2010-11-04 | 2012-05-10 | 武汉国测恒通智能仪器有限公司 | Method and device for quality-monitoring of high-voltage electrical energy |
| CN201909811U (en) * | 2010-12-31 | 2011-07-27 | 利尔达科技有限公司 | Three-phase watt-hour meter based on MSP430 singlechip |
| CN103149431A (en) * | 2013-03-19 | 2013-06-12 | 青岛乾程电子科技有限公司 | Multifunction watt-hour meter |
| CN203216988U (en) * | 2013-05-13 | 2013-09-25 | 哈尔滨国力电气有限公司 | Multifunctional electric power meter |
| CN103383410A (en) * | 2013-07-02 | 2013-11-06 | 重庆跃腾电器有限公司 | Multifunctional power meter |
| CN205049673U (en) * | 2015-10-26 | 2016-02-24 | 合肥科菲电气技术有限公司 | Multi -functional power network instrument |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337745A (en) * | 2020-03-18 | 2020-06-26 | 石家庄德堃电子科技有限公司 | Multifunctional three-phase power meter containing multiple harmonic measurement |
| CN111343066A (en) * | 2020-03-18 | 2020-06-26 | 中国舰船研究设计中心 | Anti-interference design method of power distribution information acquisition device |
| CN111343066B (en) * | 2020-03-18 | 2022-03-01 | 中国舰船研究设计中心 | Anti-interference design method of power distribution information acquisition device |
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Application publication date: 20151223 |
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