CN102998648A - Multifunctional electric meter for alternating and direct currents - Google Patents
Multifunctional electric meter for alternating and direct currents Download PDFInfo
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- CN102998648A CN102998648A CN2012105368788A CN201210536878A CN102998648A CN 102998648 A CN102998648 A CN 102998648A CN 2012105368788 A CN2012105368788 A CN 2012105368788A CN 201210536878 A CN201210536878 A CN 201210536878A CN 102998648 A CN102998648 A CN 102998648A
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Abstract
The invention discloses a multifunctional electric meter for alternating and direct currents. A main system module (5) is connected with a color liquid crystal display module (2), a precise alternating voltage sampling and gear switching module (3), a precise alternating current sampling and gear switching module (4), an electric energy input and output module (6), a keyboard module (7) and a direct current system module (9). The direct current system module (9) is connected with a precise direct voltage and current sampling and gear switching module (8). According to the multifunctional electric meter, intelligent electric measuring standard validation system software can be used for reading data of a measured device and the multifunctional electric meter for alternating and direct currents simultaneously and calculating errors, so that the validation work amount is reduced greatly; and alternating and direct currents are measured integrally, so that tedious processes of traditional validation methods are overcome for devices with alternating and direct currents needed to be verified, the labor intensity is reduced greatly, and the working efficiency is improved.
Description
Technical field
The invention belongs to the electrical measurement metering field, relate in particular to a kind of Multi-function ac/dc electrical measurement instrument that can measure the electric current and voltage of alternating current, direct current, single-phase electricity and three-phase electricity.
Background technology
The electrical measurement instrument is widely used in measurement of power test center and national metrology and measurement mechanism at different levels and quality testing department as the standard device of various single, the three-phase electric energy meter determinators of verification and alternating current-direct current indicating instrument determinator and all kinds of digital instruments.At present, the electrical measurement instrument of external import, RD-33, the RD-31 type electrical measurement instrument produced of thunder and lightning company for example, the PRS200.3 type electrical measurement instrument that EMH company produces, class of accuracy can reach 0.01 grade, but only has the measurement of alternating voltage electric current, can not measure direct current, and alternating voltage amount limit is only to 600V, and measurement range is narrow, can not satisfy the needs of domestic various electric measuring instrument and rules.And external standard scale operation of producing is very loaded down with trivial details, and communication software interface also can not be realized full-automatic verification.
Recent years is the CL3112 type three-phase multifunctional measuring instrument of section land company for example, the DK-45B2 type three-phase multifunctional measuring instrument of Nanjing Dan Dike company, its main control unit adopts built-in industrial control machine, the QWERTY keyboard input, have powerful, reliability is high, the characteristics such as software upgrading is easy to maintenance, properties of product are significantly promoted, and adopt advanced sampling computing technique to guarantee that function is excellent, and color screen liquid crystal display, full menu in Chinese, the interface is clear, easy to operate, good visual effect, voltage, electric current, power, the error of electric energy all provides Wide measuring range with relative error, and all range adopts microprocessor control to automatically switch, (English full name is the abbreviation of Analog-to-Digital Converter, and its Chinese translation is analog/digital converter to keep input ADC.) the voltage stability height, easy and simple to handle, reliable results.Also having the English full name of RS(is the abbreviation of Remote Sensing, and its Chinese translation is remote sensing.) 232, RS485 and network interface, the abbreviation that can to use the English full name of PC(be personal computer, its Chinese translation is PC.) machine controls and data management.But above-mentioned instrument all can not realize simultaneously AC and DC measurement, and alternating voltage amount limit is also only to 750V, accuracy can only reach 0.05 grade, can not satisfy the high electrical measurement verification demand of class of accuracy.
Summary of the invention
The technical problem to be solved in the present invention is, defective for the prior art existence, a kind of Multi-function ac/dc electrical measurement instrument is provided, satisfying the automatic Verification demand of alternating current-direct current electrical measurement instrument and device, and simultaneously the electric current and voltage of alternating current, direct current, single-phase electricity and three-phase electricity is measured.And obtain breaking through at class of accuracy and electric current and voltage amount limit.
Technical scheme of the present invention is, referring to accompanying drawing 1, the Multi-function ac/dc electrical measurement instrument that provides is comprised of with gear switch module 8, straight-flow system module 9 with gear switch module 4, main system module 5, electric energy input/output module 6, Keysheet module 7, the sampling of precision DC electric current and voltage with gear switch module 3, the sampling of accurate alternating current the linear power module 1 of transformer, liquid crystal screen module 2, the sampling of accurate alternating voltage as shown in Figure 1.The power output end of the linear power module 1 of wherein said transformer be connected in parallel power input, the power input of main system module 5, the power input of electric energy input/output module 6, the sampling of precision DC electric current and voltage and the power input of gear switch module 8, the power input of straight-flow system module 9 of the power input of liquid crystal screen module 2, the sampling of accurate alternating voltage and the power input of gear switch module 3, the sampling of accurate alternating current and gear switch module 4.The liquid crystal signal output part of described main system module 5 connects the signal input part of color liquid crystal panel module 2; The alternating voltage input end of analog signal of main system module 5 connects the alternating voltage analog signal output of accurate alternating voltage sampling and gear switch module 3; The control signal wire of main system module 5 connects the control signal interface of accurate alternating voltage sampling and gear switch module 3; The alternating current input end of analog signal of main system module 5 connects the alternating current analog signal output of accurate alternating current sampling and gear switch module 4; The control signal wire of main system module 5 connects the control signal interface of accurate alternating current sampling and gear switch module 4; The electric power signal line of main system module 5 connects the electric power signal interface of electric energy input/output module 6; The Keyboard Control signal wire of main system module 5 connects the keyboard signal interface of Keysheet module 7; The English full name of the SPI(of main system module 5 is the abbreviation of Serial Peripheral Interface, and its Chinese translation is serial peripheral interface.) connection connects the SPI communication interface of straight-flow system module 9.The dc voltage and current input end of analog signal of described straight-flow system module 9 connects the dc voltage and current analog signal output of the sampling of precision DC electric current and voltage and gear switch module 8; The control signal wire of described straight-flow system module 9 connects the control signal interface of the sampling of precision DC electric current and voltage and gear switch module 8.
Principle of work of the present invention is, with lower voltage, the AC/DC module through the linear power module 1 of transformer produces the required power supply of modules again by many taps Industrial Frequency Transformer of civil power 220V by the linear power module of transformer.The English full name of DSP(in the main system module is the abbreviation of Digital Signal Processor, and its Chinese translation is digital signal processor.) be embedded in real time operating system, the scanning of supervisory keyboard module, control color liquid crystal panel module shows, also controls alternating voltage data acquisition and gear switch simultaneously, control alternating current data acquisition and gear switch, and by calculating alternating voltage electric current True Data and showing.And the embedded real-time system of straight-flow system module, the sampling of control dc voltage and current and gear switch, and carry out data and process, data communication device is crossed the SPI communication modes and is sent in real time demonstration on the dsp system the most at last.Come therefrom, Multi-function ac/dc electrical measurement instrument of the present invention obtains breaking through at class of accuracy and electric current and voltage amount limit, class of accuracy reaches 0.02 grade, the three-phase alternating voltage amount is limited to 10V to 1000V, the three-phase alternating current flow is limited to 100mA to 100A, the DC voltage amount is limited to 100mV to 1000V, and direct current flow is limited to 10 μ A to 50A.
The invention has the beneficial effects as follows:
1, this measuring instrument can utilize intelligent electric mark pre-check system software that tested device and Multi-function ac/dc electrical measurement instrument data are read simultaneously, and the error of calculation, the workload of greatly having reduced verification.
2, realize alterating and direct current one bulk measurement, all needed the device of verification for alterating and direct current, overcome the complicated procedures of traditional verification mode, greatly alleviated labour intensity, improved work efficiency.
Description of drawings
Fig. 1 is the structured flowchart of a specific embodiment of Multi-function ac/dc electrical measurement instrument of the present invention, is denoted as among the figure:
The linear power module of 1-transformer,
The 2-liquid crystal screen module,
The accurate alternating voltage sampling of 3-and gear switch module,
The accurate alternating current sampling of 4-and gear switch module,
5-main system module,
6-electric energy input/output module,
The 7-Keysheet module,
The sampling of 8-precision DC electric current and voltage and gear switch module,
9-straight-flow system module.
Embodiment
Referring to Fig. 1, the linear Power supply functional module of HJ8 type transformer that the Chinese Suzhou of linear power module 1 employing of the transformer of this embodiment of Multi-function ac/dc electrical measurement instrument of the present invention shown in Figure 1 Western Hills mutual inductor scientific and technological development company limited produces.8.4 cun VGA Presentation Function modules that liquid crystal screen module 2 adopts NEC Corporation to produce.UPR-UPSC type alternating voltage sampling functions module, UPRNS-UPRND type alternating current sampling functions module that accurate alternating voltage sampling and gear switch module 3, the sampling of accurate alternating current and gear switch module 4 adopt respectively China Shenzhen Yi Jie Electronics Co., Ltd. to produce successively.The DSP ac control system functional module that main system module 5 adopts ADI company to produce.The HCPL-665KR type high speed optoelectronic isolation features module that electric energy input/output module 6 adopts Avago Technologies to produce.The film-type key-press module that Keysheet module 7 adopts Nanjing of China Ran Di electronics technology company limited to produce.The sampling of precision DC electric current and voltage adopts sky, Chinese Jining to plough the RNG-1 type direct current sampling functions module that Electric Applicance Co., Ltd produces with gear switch module 8.The ARM DC control system functional module that straight-flow system module 9 adopts NXP company to produce.
The linear power module 1 of described transformer, liquid crystal screen module 2, the sampling of accurate alternating voltage and gear switch module 3, the sampling of accurate alternating current are pressed technique scheme with gear switch module 4, main system module 5, electric energy input/output module 6, Keysheet module 7, the sampling of precision DC electric current and voltage with gear switch module 8, straight-flow system module 9, connect with reference to structure shown in Figure 1.Wherein, the power output end of the linear power module 1 of transformer power input, the power input of main system module 5, the power input of electric energy input/output module 6, the sampling of precision DC electric current and voltage and the power input of gear switch module 8, the power input of straight-flow system module 9 of the power input of liquid crystal screen module 2, the sampling of accurate alternating voltage and the power input of gear switch module 3, the sampling of accurate alternating current and gear switch module 4 that be connected in parallel.The liquid crystal signal output part of described main system module 5 connects the signal input part of color liquid crystal panel module 2; The alternating voltage input end of analog signal of main system module 5 connects the alternating voltage analog signal output of accurate alternating voltage sampling and gear switch module 3; The control signal wire of main system module 5 connects the control signal interface of accurate alternating voltage sampling and gear switch module 3; The alternating current input end of analog signal of main system module 5 connects the alternating current analog signal output of accurate alternating current sampling and gear switch module 4; The control signal wire of main system module 5 connects the control signal interface of accurate alternating current sampling and gear switch module 4; The electric power signal line of main system module 5 connects the electric power signal interface of electric energy input/output module 6; The Keyboard Control signal wire of main system module 5 connects the keyboard signal interface of Keysheet module 7; The SPI connection of main system module 5 connects the SPI communication interface of straight-flow system module 9.The dc voltage and current input end of analog signal of described straight-flow system module 9 connects the dc voltage and current analog signal output of the sampling of precision DC electric current and voltage and gear switch module 8; The control signal wire of described straight-flow system module 9 connects the control signal interface of the sampling of precision DC electric current and voltage and gear switch module 8.
The Multi-function ac/dc electrical measurement instrument of the present embodiment that consists of thus is through manufacturing experimently convenient and practical, the quickness and high efficiency that is proved to be on probation, greatly improved checker's work efficiency, alleviated its workload, economized the check evaluation of metering detection research institute through Hunan China and meet 0.02 classification standard.
Claims (1)
1. Multi-function ac/dc electrical measurement instrument, it is characterized in that, it is by the linear power module (1) of transformer, liquid crystal screen module (2), accurate alternating voltage sampling and gear switch module (3), accurate alternating current sampling and gear switch module (4), main system module (5), electric energy input/output module (6), Keysheet module (7), the sampling of precision DC electric current and voltage and gear switch module (8), straight-flow system module (9) forms, the be connected in parallel power input of liquid crystal screen module (2) of the power output end of the linear power module of wherein said transformer (1), the power input of accurate alternating voltage sampling and gear switch module (3), the power input of accurate alternating current sampling and gear switch module (4), the power input of main system module (5), the power input of electric energy input/output module (6), the power input of the sampling of precision DC electric current and voltage and gear switch module (8), the power input of straight-flow system module (9), the liquid crystal signal output part of described main system module (5) connects the signal input part of color liquid crystal panel module (2); The alternating voltage input end of analog signal of main system module (5) connects the alternating voltage analog signal output of accurate alternating voltage sampling and gear switch module (3); The control signal wire of main system module (5) connects the control signal interface of accurate alternating voltage sampling and gear switch module (3); The alternating current input end of analog signal of main system module (5) connects the alternating current analog signal output of accurate alternating current sampling and gear switch module (4); The control signal wire of main system module (5) connects the control signal interface of accurate alternating current sampling and gear switch module (4); The electric power signal line of main system module (5) connects the electric power signal interface of electric energy input/output module (6); The Keyboard Control signal wire of main system module (5) connects the keyboard signal interface of Keysheet module (7); The SPI connection of main system module (5) connects the SPI communication interface of straight-flow system module (9), and the dc voltage and current input end of analog signal of described straight-flow system module (9) connects the dc voltage and current analog signal output of the sampling of precision DC electric current and voltage and gear switch module (8); The control signal wire of described straight-flow system module (9) connects the control signal interface of the sampling of precision DC electric current and voltage and gear switch module (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210536878.8A CN102998648B (en) | 2012-12-13 | 2012-12-13 | Multifunctional electric meter for alternating and direct currents |
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| CN201210536878.8A CN102998648B (en) | 2012-12-13 | 2012-12-13 | Multifunctional electric meter for alternating and direct currents |
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| CN102998648B CN102998648B (en) | 2015-07-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676890A (en) * | 2013-12-18 | 2014-03-26 | 江苏方天电力技术有限公司 | Automatic calibrating device of comprehensive protection system |
| CN105866703A (en) * | 2016-05-25 | 2016-08-17 | 东莞博力威新能源有限公司 | Simulation automobile starting intelligent tester device and testing method |
| CN108008173A (en) * | 2016-10-28 | 2018-05-08 | 致茂电子股份有限公司 | Alternating current-direct current is superimposed test device |
| CN112118982A (en) * | 2018-03-19 | 2020-12-22 | 西门子股份公司 | Charging system for charging an electrical energy store of an electric vehicle and associated method |
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| CN2261029Y (en) * | 1996-10-09 | 1997-08-27 | 毛晋 | Comprehensive calibrator for electric measuring device |
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| CN201514448U (en) * | 2009-07-02 | 2010-06-23 | 上海市电力公司超高压输变电公司 | Integrated testing device of relay protection |
| CN201611357U (en) * | 2010-01-29 | 2010-10-20 | 上海纳宇电气有限公司 | Intelligent network electric power meter of an outlaid additional function module |
| DE102009057282A1 (en) * | 2009-12-07 | 2011-06-09 | Siemens Aktiengesellschaft | Current measuring system for use in voltage source inverter for measuring current of induction motor, has resistor for determining inverter module output current from determined alternating current portion and intermediate circuit current |
| CN202995019U (en) * | 2012-12-13 | 2013-06-12 | 湖南省电力公司科学研究院 | Multifunctional alternating current and direct current measuring instrument |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676890A (en) * | 2013-12-18 | 2014-03-26 | 江苏方天电力技术有限公司 | Automatic calibrating device of comprehensive protection system |
| CN105866703A (en) * | 2016-05-25 | 2016-08-17 | 东莞博力威新能源有限公司 | Simulation automobile starting intelligent tester device and testing method |
| CN108008173A (en) * | 2016-10-28 | 2018-05-08 | 致茂电子股份有限公司 | Alternating current-direct current is superimposed test device |
| CN108008173B (en) * | 2016-10-28 | 2020-02-18 | 致茂电子股份有限公司 | Alternating current-direct current superposition testing device |
| CN112118982A (en) * | 2018-03-19 | 2020-12-22 | 西门子股份公司 | Charging system for charging an electrical energy store of an electric vehicle and associated method |
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| CN102998648B (en) | 2015-07-08 |
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