CN201382974Y - Power measurement device for variable-frequency power supply - Google Patents
Power measurement device for variable-frequency power supply Download PDFInfo
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- CN201382974Y CN201382974Y CN200920064038U CN200920064038U CN201382974Y CN 201382974 Y CN201382974 Y CN 201382974Y CN 200920064038 U CN200920064038 U CN 200920064038U CN 200920064038 U CN200920064038 U CN 200920064038U CN 201382974 Y CN201382974 Y CN 201382974Y
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Abstract
The utility model relates to a power measurement device for variable-frequency power supply, which comprises a variable-frequency signal, an electrical quantity sensor, a signal conditioning unit, a data acquisition card, a data processing unit and a data display unit which are connected together electrically. The power measurement device is characterized in that the data processing unit is also connected with a computer, data analysis software, test software, distance communication, data sheet and storage software internally; the data display unit is composed of a monitor and a printer. The power measurement device realizes the high speed synchronous acquisition from low frequency signal to high frequency signal, improves measurement accuracy and greatly reduces the error rate; adopting powerful analysis capacity of computer and employing virtual instrument technique, the high accuracy digital signal processing is realized. The power measurement device can measure non-sine alternating period signal with wide range and can perform high-accuracy power measurement and harmonic wave analysis on signals, and also can store test data for further analysis.
Description
Technical field
The utility model relates to a kind of measurement mechanism, is specifically related to based on the power measurement of the variable-frequency power sources of virtual instrument technique and the power measurement and the frequency analysis of all kinds of frequency conversion equipments.
Background technology
Along with the widespread use of all kinds of variable-frequency motors, variable-frequency power sources has spread all over different social sectors such as industry manufacturing, traffic, and enterprise is also more and more higher to the attention rate of the day-to-day operation of variable-frequency power sources, maintenance.
The product of current realization variable-frequency power sources power measurement and frequency analysis adopts the high-speed dsp chip mostly, can't measure non-sinusoidal alternating cycles signal, and frequency band is narrow, and precision also is difficult to guarantee.
Summary of the invention
The purpose of this utility model is to provide a kind of measuring accuracy height, reliable operation, the variable-frequency power sources power-measuring device of bandwidth.
The utility model is by frequency variation signal, electrical quantity sensor, and the signal condition unit, data collecting card, data processing unit and data display unit are electrically connected to be formed.It is characterized in that also being connected with in turn in the described data processing unit computing machine, data analysis software, testing software, telecommunication, data sheet and storage; Data display unit is made up of display and printer.
Frequency variation signal behind electrical quantity sensor, signal condition, through data acquisition with data transmission in computing machine, signal is carried out power and frequency analysis and realizes storage, printing by testing software data.
The utility model is to measure the positive improvement that frequency band range deficiency little, that precision is low, error is big is made at on-the-spot frequency variation signal.Realized the high-speed synchronous collection from the low frequency to the high-frequency signal in data acquisition, improved the precision of measuring, error rate reduces greatly; By the powerful analysis ability of computing machine, the utilization virtual instrument technique has been realized high-precision digital signal processing.Adopt the utility model can the wide non-sinusoidal alternating cycles signal of measurement range, signal is carried out high-precision power measurement and frequency analysis, test data is stored, so that ex-post analysis.
Description of drawings
Fig. 1 is the utility model structure principle chart.
1 frequency variation signal among the figure, 2 electrical quantity sensors, 3 signal condition unit, 4 data collecting cards, 5 data processing units, 6 computing machines, 7 data analysis software, 8 testing softwares, telecommunication, 10 data sheets and storage, 11 data display unit.
Embodiment
As above-mentioned accompanying drawing, the variable-frequency power sources power-measuring device is mainly by frequency variation signal 1, electrical quantity sensor 2, and signal condition unit 3, data collecting card 4, data processing unit 5, data display unit 11 is electrically connected composition successively.Wherein, also be connected with computing machine 6, data analysis software 7, testing software 8, telecommunication 9, data sheet and storage 10 in the data processing unit 5 in turn.Data display unit 11 comprises hardware display, printer and software data software for display.
Frequency variation signal 1 is converted into low-voltage, the weak current signal that signal condition unit 3 can receive to high voltage, big current signal by electrical quantity sensor 2, and the conditioning plate of signal condition unit 3 is converted into the voltage range that data collecting card 4 can receive to electric current, the voltage signal to electrical quantity sensor 2 outputs.Data collecting card 4 links to each other with the computing machine 6 of data processing unit 5 through data line, finish the isoparametric setting of sample frequency, sampling number of data collecting card 4 by the testing software 8 that is provided with in the computing machine 6, and the voltage signal of 4 pairs of signal condition unit of control data capture card, 3 outputs carries out synchronized sampling, the data that obtain after the sampling are delivered to data analysis software 7 carry out analytical calculation, can be applied in: voltage, the total effective value of electric current, first-harmonic effective value, total percent harmonic distortion THD, distortion index DF; Three phase variable frequency active power, fundamental active power, power factor, phase shift factor, total percent harmonic distortion THD, distortion index DF; Single-phase power and power factor; Higher hamonic wave analysis etc.The data result of handling is presented on the display in mode intuitively by data display unit 11, and important data are delivered to database storing and generated the test form, and the user can access historical data when needed and check and print.
Claims (2)
1, a kind of variable-frequency power sources power-measuring device, by frequency variation signal (1), electrical quantity sensor (2), signal condition unit (3), data collecting card (4), data processing unit (5), data display unit (11) are electrically connected composition successively, it is characterized in that: also be connected with computing machine (6), data analysis software (7), testing software (8), telecommunication (9), data sheet and storage (10) in the described data processing unit (5) in turn.
2, according to the described measurement mechanism of claim 1, it is characterized in that: described data display unit comprises display and printer in (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920064038U CN201382974Y (en) | 2009-04-10 | 2009-04-10 | Power measurement device for variable-frequency power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920064038U CN201382974Y (en) | 2009-04-10 | 2009-04-10 | Power measurement device for variable-frequency power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201382974Y true CN201382974Y (en) | 2010-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920064038U Expired - Fee Related CN201382974Y (en) | 2009-04-10 | 2009-04-10 | Power measurement device for variable-frequency power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201382974Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105808164A (en) * | 2016-03-02 | 2016-07-27 | 上海理工大学 | Variable frequency storage methods for low-frequency signals and low-frequency data of battery pack |
-
2009
- 2009-04-10 CN CN200920064038U patent/CN201382974Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105808164A (en) * | 2016-03-02 | 2016-07-27 | 上海理工大学 | Variable frequency storage methods for low-frequency signals and low-frequency data of battery pack |
| CN105808164B (en) * | 2016-03-02 | 2018-10-23 | 上海理工大学 | Low frequency signal frequency conversion storage method and battery pack low-frequency data frequency conversion storage method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100113 Termination date: 20130410 |