CN202870286U - Calibration device used for calibration analysis apparatus - Google Patents
Calibration device used for calibration analysis apparatus Download PDFInfo
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- CN202870286U CN202870286U CN 201220380314 CN201220380314U CN202870286U CN 202870286 U CN202870286 U CN 202870286U CN 201220380314 CN201220380314 CN 201220380314 CN 201220380314 U CN201220380314 U CN 201220380314U CN 202870286 U CN202870286 U CN 202870286U
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- 238000004458 analytical method Methods 0.000 title claims abstract description 16
- 239000012491 analyte Substances 0.000 claims description 20
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
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Abstract
The utility model relates to a calibration device used for a calibration analysis apparatus. The calibration device is characterized by comprising two standard power sources, two universal meters, a calibration analysis apparatus and a control computer, wherein the standard power sources, the calibration analysis apparatus and the universal meters are respectively connected with the control computer via buses. A calibration value of the calibration device can be traced to a national standard, thereby solving problems of calibration and traceablility of a harmonic wave analysis apparatus.
Description
Technical field
The utility model relates to equipment, specifically, relates to the correcting device of electrotechnical instrument and meter.
Background technology
Among the GB/T 4365-2003 " electrotechnical terminology electromagnetic compatibility " for first-harmonic and harmonic wave just like giving a definition first-harmonic: a component of degree n n of the Fourier series of one-period amount; Harmonic wave: number of times is greater than the component of 1 integral multiple in the Fourier series of one-period.In the ideal case, electric system provides the standard sine wave signal of a constant power frequency (50Hz) for the user.But because the employed load of user is diversified, a large amount of nonlinear loads and the use of frequency conversion equipment can make the sine wave generator distortion of standard, namely have harmonic wave to produce in the circuit, and harm of harmonic is very serious.Harmonic wave makes the Efficiency Decreasing of production, transmission and the utilization of electric energy, makes device of overheating of electrical, produces vibration and noise, and make insulation ag(e)ing, and shorten serviceable life, even breaks down or burn.Harmonic wave is subject to the people's attention day by day as the important technology index of electric energy quality monitoring, in order to understand the size of harmonic wave, and then harmonic source is controlled, and a large amount of power quality analyzers, harmonic analysis instrument are applied in the every field of electric system widely.Be that device fabrication producer or coherent detection mechanism all need the harmonic standard device in order to calibrating the frequency analysis instrument, and guarantee that calibration result can be traceable to National primary standard.
At present, mostly the harmonic standard source device of selling on the market is to adopt " signal generator+amplifier " scheme to realize.Produce needed harmonic wave small-signal by signal generator, be enlarged into the standard harmonic signal via amplifier.There are several shortcomings in this scheme:
Because the limit bandwidth of amplifier, the harmonic wave order that can export is restricted.Because the linearity of amplifier is limit, need backfeed loop to adjust the harmonic wave small-signal of signal generator output, so that whole apparatus structure more complicated is expensive.Backfeed loop need to use DFT or FFT to carry out computing, so that device is for the fan-out capability reduction of a harmonic wave and subharmonic.
The utility model content
The purpose of this utility model is, in view of the foregoing defects the prior art has, a kind of correcting device for the calibration analyte instrument is provided, this equipment can be calibrated the equipment such as power quality analyzer, harmonic analysis instrument, simultaneously, the calibration value can be traceable to National primary standard, has solved the calibration of frequency analysis instrument and the problem of tracing to the source.
A kind of correcting device for the calibration analyte instrument that the utility model provides, its improvements are to comprise the accurate power source of 2 station symbols, 2 multimeters, calibration analyte instrument and control computing machines, and described calibration power source, calibration analyte instrument and multimeter couple together by bus and control computing machine respectively.
The first preferred correcting device that is used for the calibration analyte instrument that the utility model provides, described bus is the IEEE488 bus.
The second preferred correcting device that is used for the calibration analyte instrument that the utility model provides, described fundamental frequency is 45Hz～65Hz.
The 3rd preferred correcting device that is used for the calibration analyte instrument that the utility model provides, the harmonic wave order is up to 100 times.
The 4th preferred correcting device that is used for the calibration analyte instrument that the utility model provides, described correcting device outlet chamber harmonic wave and rd harmonic signal.
The 5th preferred correcting device that is used for the calibration analyte instrument that the utility model provides, described calibration analyte instrument is power quality analyzer or harmonic analysis instrument.
Fundamental frequency can be 45Hz～65Hz, and the harmonic wave order is up to 100 times, and energy outlet chamber harmonic wave and rd harmonic signal can be used for calibrating the equipment such as power quality analyzer, harmonic analysis instrument, and calibration result can be traceable to national standard.
Compared with prior art, a kind of correcting device for the calibration analyte instrument of providing of the utility model has following beneficial effect:
1, the device source tracing method is simple, and the nonsinusoidal signal of complexity is traced to the source is converted to tracing to the source of the sinusoidal wave high accuracy number voltage table of wideband;
2, stackable overtone order is high, and harmonic content is large;
3, exportable harmonic wave and subharmonic standard signal;
4, avoid adopting amplifier, so that the structure of whole device is comparatively simple, and cost is low.
Description of drawings
Fig. 1 is: the principle assumption diagram of a kind of correcting device for the calibration analyte instrument provided by the invention;
Fig. 2 is: the control principle process flow diagram of the control computing machine of a kind of correcting device for the calibration analyte instrument provided by the invention;
Among the figure: 1, control computing machine; 2, calibration power source; 3, calibration power source; 4, multimeter; 5, multimeter; 6, be calibrated the frequency analysis instrument.
Embodiment
Below by drawings and Examples a kind of correcting device for the calibration analyte instrument provided by the invention is done further more detailed description.
Embodiment 1
The correcting device that is used for the calibration analyte instrument of present embodiment may further comprise the steps:
1) calibration power source 2 and calibration power source 3, multimeter 4, multimeter 5, frequency analysis instrument 6 and control computing machine 1 are coupled together by the IEEE488 bus;
2) Application standard power source 2 sine wave output signals are as fundametal compoment, and this signal is measured by multimeter 4, and measured value is as the fundametal compoment standard value;
3) Application standard power source 3 sine wave output signals are as harmonic component, and this signal is measured by the multimeter 5 of correspondence, and measured value is as the harmonic component standard value;
4) first-harmonic source signal and harmonic source signal are by phase-locked control, and the harmonic signal that the series connection vector synthesizes standard is input in the frequency analysis instrument, in order to calibration.
Fundamental frequency is 45Hz, and the harmonic wave order is up to 100 times, correcting device outlet chamber harmonic wave and rd harmonic signal.
Namely as shown in Figure 1, Application standard power source 2 sine wave output signals are as fundametal compoment, and this signal is measured by multimeter 4, and measured value is as the fundametal compoment standard value.Calibration power source 3 sine wave output signals are as harmonic component, and this signal is measured by multimeter 5, and measured value is as the harmonic component standard value.First-harmonic source signal and harmonic source signal are by phase-locked control, and the harmonic signal that the series connection vector synthesizes standard is input in the frequency analysis instrument 6, in order to calibration instrument.Calibration power source 2,3 and multimeter 4,5 respectively by control computing machine 1 by the IEEE488 bus control output and data read; Wherein, control computing machine 1 is controlled output by the IEEE488 bus and data read and see Fig. 2.
Embodiment 2
Present embodiment has difference only and is to make calibration power source 3 sine wave output signals as fundametal compoment with embodiment 1, and this signal is measured by multimeter 5, and measured value is as the fundametal compoment standard value;
Application standard power source 2 sine wave output signals are as harmonic component, and this signal is measured by the multimeter 4 of correspondence, and measured value is as the harmonic component standard value; First-harmonic source signal and harmonic source signal are by phase-locked control, and the harmonic signal that the series connection vector synthesizes standard is input in the power quality analyzer, in order to calibration instrument; Fundamental frequency is 65Hz.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; although with reference to above-described embodiment the utility model is had been described in detail; those of ordinary skill in the field are to be understood that: the technician reads after the present specification still and can make amendment or be equal to replacement embodiment of the present utility model, does not await the reply within the claim protection domain but these modifications or change all break away from the utility model application.
Claims (3)
1. correcting device that is used for the calibration analyte instrument, it is characterized in that comprising the accurate power source of 2 station symbols, 2 multimeters, calibration analyte instrument and control computing machines, described calibration power source, calibration analyte instrument and multimeter couple together by bus and control computing machine respectively.
2. correcting device according to claim 1 is characterized in that described bus is the IEEE488 bus.
3. correcting device according to claim 1 is characterized in that described calibration analyte instrument is power quality analyzer or harmonic analysis instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380314 CN202870286U (en) | 2012-08-02 | 2012-08-02 | Calibration device used for calibration analysis apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380314 CN202870286U (en) | 2012-08-02 | 2012-08-02 | Calibration device used for calibration analysis apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202870286U true CN202870286U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220380314 Expired - Lifetime CN202870286U (en) | 2012-08-02 | 2012-08-02 | Calibration device used for calibration analysis apparatus |
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| CN (1) | CN202870286U (en) |
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2012
- 2012-08-02 CN CN 201220380314 patent/CN202870286U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |